Consulta: subjectFacets:"Viability"
Registros recuperados: 83
Data/hora: 03/06/2024 03:31:56

Uso comercial de azadiractina y su integración a los agroecosistemas tropicales.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Esparza Díaz, Gabriela.
Se estudiaron los procesos de extracción de compuestos de la semilla de nim y su efecto en Aphis gossypii Glover, se exploró la viabilidad del uso comercial de azadiractina y su producción en México. En la primera parte se evaluaron los procesos de extracción de azadiractina de la semilla por extrusión y Soxhlet, con los solventes metanol, hexano, agua y d-limoneno. La concentración de 2478 mg kg-1 de azadiractina A (AZA) producida al usar metanol por extrusión, fue significativamente mayor que el resto de los solventes. Este extracto de la semilla (azadirex) también contuvo salanina, azadiractina B, y nimbina; la concentración de salanina fue de 3866 mg kg-1 y superó significativamente a las otras sustancias. Los métodos de extracción (acuosa, Soxhlet con...
Palavras-chave: Azadirachta indica A. Juss.; Viabilidad; Salanina; Nimbina; Viability; Salannin; Nimbin; Doctorado; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/213

Determinación del óptimo económico en la producción de "setas" (Pleurotus ostreatus)
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Alemán Morales, Mireya.
La producción de “setas” (Pleurotus ostreatus), es una alternativa para producir y diversificar los alimentos que requiere la población en México. En el país es escasa la información acerca de la  rentabilidad de éste cultivo. Por ello, el objetivo de este trabajo fue estimar una función de producción que muestre matemáticamente la relación funcional entre los insumos productivos utilizados y la producción “setas”. La variable dependiente la constituyó la producción de “setas” producidas y la variable independiente fueron las bolsas en producción. Los resultados económicos mostraron que la etapa de producción II, la que es económicamente relevante, se inicia en el punto donde se encuentran en el área de producción 2449 bolsas y termina donde el producto...
Tipo: Tesis
Palavras-chave: Función de producción; Pleurotus ostreatus; Optimización; Rentabilidad; “setas”; Production function; Pleurotus ostreatus; Optimisation; Viability; “mushrooms”.
Ano: 2008
URL: http://hdl.handle.net/10521/1417

Germinación y propagación de Tillandsia macdougallii L. B Sm. y Tillandsia violacea Baker (Bromeliaceae) con fines de aprovechamiento sustentable.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Vázquez Hurtado, Nora Berenice.
Los procesos sustentables son adoptados con mayor frecuencia por comunidades rurales de México. La conveniencia de conservar y aprovechar de una forma sostenible los recursos naturales, especialmente las bromelias (con potencial ornamental), pueden generar opciones y beneficios para las familias. Como una opción para evitar el saqueo, así como contribuir al manejo y protección, de las bromelias .En esta investigación se plantearon los siguientes objetivo:1) se evaluó el porcentaje de germinación y viabilidad en las semillas de Tillandsia macdougallii y Tillandsia violacea, 2) se probó el efecto de los tratamientos pregerminativos, AG₃ y NKO₃ en la germinación y desarrollo de plántulas, 3) se estudiaron los efectos de diferentes sustratos para el...
Palavras-chave: Germinación; Viabilidad; Sustratos; Micropropagación; Sobrevivencia; Germination; Viability; Substrates; Micropropagation; Survival; Botánica; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2298

Uso comercial de azadiractina y su integración a los agroecosistemas tropicales.
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Esparza Díaz, Gabriela.
Se estudiaron los procesos de extracción de compuestos de la semilla de nim y su efecto en Aphis gossypii Glover, se exploró la viabilidad del uso comercial de azadiractina y su producción en México. En la primera parte se evaluaron los procesos de extracción de azadiractina de la semilla por extrusión y Soxhlet, con los solventes metanol, hexano, agua y d-limoneno. La concentración de 2478 mg kg-1 de azadiractina A (AZA) producida al usar metanol por extrusión, fue significativamente mayor que el resto de los solventes. Este extracto de la semilla (azadirex) también contuvo salanina, azadiractina B, y nimbina; la concentración de salanina fue de 3866 mg kg-1 y superó significativamente a las otras sustancias. Los métodos de extracción (acuosa, Soxhlet con...
Palavras-chave: Azadirachta indica A. Juss.; Viabilidad; Salanina; Nimbina; Viability; Salannin; Nimbin; Doctorado; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/213

Effect of refrigerated storage on the probiotic survival and sensory properties of milk/carrot juice mix drink
Provedor de dados: Electronic Journal of Biotechnology
Autores: Daneshi,Mohammad; Ehsani,Mohammad Reza; Razavi,Seyed Hadi; Labbafi,Mohsen.
Background: There is a genuine interest in the development of probiotic milk and juice based beverages because they are a good-vehicle to deliver probiotic microorganisms to consumers. For this purpose, the viability and metabolism of four probiotic strains (Lactobacillus acidophilus LA5, Bifidobacterium lactis BB12, L. rhamnosus and L. plantarum) were studied in non-fermented milk and carrot juice mix drink. The drinks were evaluated in 5 days interval for viable cell count, pH, acidity, sedimentation and sensory quality during refrigerated storage at 4 ± 2ºC for up to 20 days. Results: The results showed that all strains had good viability in milk/carrot juice drink (88-98%), but L. acidophilus LA5 seemed more stable than three other strains. The levels...
Tipo: Journal article
Palavras-chave: Carrot juice; Functional beverage; Non-fermented; Probiotic; Viability.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000500005

Viability of probiotic bacteria and some chemical and sensory characteristics in cornelian cherry juice during cold storage
Provedor de dados: Electronic Journal of Biotechnology
Autores: Nematollahia,Amene; Sohrabvandi,Sara; Mortazavian,Amir Mohammad; Jazaeri,Sahar.
Background: Increased popularity of vegetarianism, lactose intolerance, and the high cholesterol content in dairy products, are all factors that have recently increased the demand for nondairy probiotic products. The objective of this study is to evaluate the effect of refrigeration on the viability of probiotics and asses some of the chemical and sensory characteristics in cornelian cherry juice. Results: The Iranian native probiotic strain (L. casei T4) showed greater viability compared to industrial types (viable count of 8.67 log cfu/mL versus &lt;6.0 log cfu/mL at d 28). However, this most tolerant Iranian strain, could not withstand the conditions of 'Natural juice' at pH 2.6 for more than 7 d. Following a pH adjusted treatment (to pH ~3.5), the...
Tipo: Journal article
Palavras-chave: Antioxidant activity; Anthocyanin; Cornelian cherry; Phenolic compounds; Probiotic; Viability.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000300005

Selection of Trichogramma species for controlling the Diamondback moth
Provedor de dados: Horticultura Brasileira
Autores: Pratissoli,Dirceu; Polanczyk,Ricardo A; Holtz,Anderson M; Dalvi,Leandro P; Silva,Alexandre F; Silva,Luciano N.
Biological characteristics of the egg parasitoids Trichogramma acacioi, T. atopovirilia, and T. bennetti were studied to select the one with better performance on the control of the Diamondback moth, Plutella xylostella. Parasitism rate, viability, and sex ratio were studied. Parasitism rate ranged from 1.67 to 41.33%. T. atopovirilia and T. acacioi were respectively the most and less aggressive species. The viability ranged from 6.20% for T. acacioi to 53.34% for T. atopovirilia. There were no differences on sex ratio (p&lt;0.05) that remained above 0,88. T. atopovirilia was the species with best performance in the laboratory when rearing on the Diamondback moth eggs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plutella xylostella; Biological control; Egg parasitoids; Parasitism; Sex ratio; Viability.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000200026

Selection of Trichogramma species for controlling the Diamondback moth
Provedor de dados: Horticultura Brasileira
Autores: Pratissoli,Dirceu; Polanczyk,Ricardo A; Holtz,Anderson M; Dalvi,Leandro P; Silva,Alexandre F; Silva,Luciano N.
Biological characteristics of the egg parasitoids Trichogramma acacioi, T. atopovirilia, and T. bennetti were studied to select the one with better performance on the control of the Diamondback moth, Plutella xylostella. Parasitism rate, viability, and sex ratio were studied. Parasitism rate ranged from 1.67 to 41.33%. T. atopovirilia and T. acacioi were respectively the most and less aggressive species. The viability ranged from 6.20% for T. acacioi to 53.34% for T. atopovirilia. There were no differences on sex ratio (P &lt; 0.05) that remained above 0,88. T. atopovirilia was the species with best performance in the laboratory when rearing on the Diamondback moth eggs.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plutella xylostella; Biological control; Egg parasitoids; Parasitism; Sex ratio; Viability.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000200013

ЖИЗНЕСПОСОБНОСТЬ DUNALIELLA SALINA В ЗАВИСИМОСТИ ОТ УСЛОВИЙ ОБЕЗВОЖИВАНИЯ И ДЛИТЕЛЬНОСТИ ХРАНЕНИЯ В СОСТОЯНИИ АНГИДРОБИОЗА
Provedor de dados: IBSS Repository
Autores: Харчук, И. А.
Изучена жизнеспособность Dunaliella salina в зависимости от условий обезвоживания и длительности хранения в состоянии ангидробиоза Показано, что неинцистированные клетки D. salina сохраняют жизнеспособность в обезвоженном состоянии в течение 7 суток. Более длительное их хранение приводит к необратимым изменениям в клетках и потере способности восстанавливать жизнеспособность. Биохимические исследования зарегистрировали деструкцию пигментного ком- плекса. Зависимости инцистирования клеток от температуры обезвоживания, длительности дегидратации, остаточной влажности культуры после высушивания и времени хранения не выявлено. Во всех случаях цисты прорастали через 20 дней. http://biotex.ibss.org.ua/
Tipo: Journal Contribution
Palavras-chave: Dunaliella salina; Жизнеспособность; Ангидробиоз; Цисты; Биохимический состав; Життєздатність; Ангідробіоз; Біохімічний склад; Viability; Anhydrbiosis; Cysts; Biochemical structure.
Ano: 2010
URL: http://repository.ibss.org.ua/dspace/handle/99011/1873

Fitness components of a recently-established population of Zaprionus indianus (Diptera, Drosophilidae) in Brazil
Provedor de dados: Iheringia Série Zoologia
Autores: Setta,Nathalia de; Carareto,Cláudia M. A.
This study aimed to evaluate fitness components of Zaprionus indianus Gupta, 1970, a species recently introduced in Brazil and currently in process of colonization. Longevity, productivity, developmental speed and viability of flies sampled from a population from Mirassol (state of São Paulo, Brazil) were evaluated. Longevity was higher than that of some Indian populations and productivity was similar or higher than in other Drosophilidae. Time of development, one of the main fitness components for competition, was very similar to the values scored in Drosophila sturtevanti Duda, 1927, a species that occurs in high frequencies in the same area as Z. indianus. These data might contribute further for understanding the colonization success of this newcomer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fitness components; Productivity; Viability; Time of development; Zaprionus.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000100007

A gueroba (Syagrus oleracea Becc.) nas comunidades rurais II: sistema de producao e avaliacao economica.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: AGUIAR, J. L. P. de; ALMEIDA, S. P. de.
A gueroba, guariroba ou gariroba e uma palmeira importante para a populacao do Cerrado, sendo extraido dela um palmito de sabor amargo muito apreciado na culinaria regional. Esse produto e comercializado, geralmente, in natura e sua industrializacao ainda e artesanal. Seu principal mercado localiza-se nos Estados de Goias, Tocantins, Mato Grosso, Mato Grosso do Sul, algumas regoes da Bahia e de Minas Gerais e no Distrito Federal. Com a exploracao predatoria e a acelerada destruicao da vegetacao nativa por meio da expansao da fronteira agricola, a oferta do produto, oriunda do extrativismo, vem sendo reduzida substancialmente. No entanto, tem-se observado o cultivo dessa palmeira em alguns Estados, principalmente em Goias que, em 1999, cultivava 4.499...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Gueroba; Syagrus oleracea; Production system; Viabilidade; Cerrado; Guariroba; Palmae; Palmeira Oleaginosa; Sistema de Produção; Viability.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/564012

Genipa americana L.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: JOKER, D.; SALOMAO, A. N.
bitstream/item/179035/1/genipa-americana-67-int.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Distribuição natural; Uso; Manipulação; Viabilidade; Genipa americana L; Natural distribution; Uses; Botanics; Fruit; Processing; Handling; Armazenamento; Botânica; Colheita; Dormência; Floração; Frutificação; Fruto; Germinação; Habitat; Processamento; Semeadura; Semente; Taxonomia; Dormancy; Flowering; Fruiting; Germination; Habitats; Harvesting; Seeds; Sowing; Storage; Taxonomy; Viability.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1092807

Assessment of viability in the bacterial standing stock of the Antarctic sea from the Indian side
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loka Bharathi, Pa; Nair, S; Bd De Souza, Mj; Chandramohan, D.
During the austral summer, we examined the bacterial population along the cruise track extending from 70degrees S and 18degrees E to 30degrees S and 35degrees E. During the cruise, three distinct fractions of the bacterioplankton viz. total count, total direct viable and retrievable counts were simultaneously enumerated in these waters. In the stations south of the convergent region designated as section I the population ranged within 10(8-9) L-1 whereas in the north of the region designated as section 11 they were one order higher and ranged from 10(9-10) L-1. The percentage of viability in the region was high corresponding to the generally high chlorophyll and primary productivity encountered in the eastern Aghulas bank. The study substantiates the...
Tipo: Text
Palavras-chave: Bactérie; Viabilité; Océan Antarctique; Secteur indien; Bacteria; Viability; Antarctic ocean; Indian side.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43334/42893.pdf

Ecological-economic modelling for the sustainable management of biodiversity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doyen, Luc; Cisse, Abdoul; Gourguet, Sophie; Mouysset, L.; Hardy, Pierre-yves; Bene, Christophe; Blanchard, Fabian; Jiguet, Frederic; Pereau, J.-c.; Thebaud, Olivier.
Terrestrial and marine biodiversity provides the basis for both ecosystems functioning and numerous commodities or services that underpin human well-being. From several decades, alarming trends have been reported worldwide for both biodiversity and ecosystem services. Therefore the sustainable management of biodiversity requires a double viewpoint balancing ecological conservation with the welfare of human societies. Understanding the underlying trade-offs, synergies and interactions imposes the development of interdisciplinary researches and methods. In that respect, bio-economic or ecological economic modeling is likely to play a major role. The present paper intends to elicit the key features, strengths and challenges of bio-economic approaches...
Tipo: Text
Palavras-chave: Ecological economics; Modeling; Sustainability; Biodiversity; Public policy; Criterion; Equilibrium; Optimality; Viability.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00171/28208/26510.pdf

Ecoviability for ecosystem-based fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doyen, Luc; Bene, Christophe; Bertignac, Michel; Blanchard, Fabian; Cisse, Abdoul; Dichmont, Catherine; Gourguet, Sophie; Guyader, Olivier; Hardy, Pierre-yves; Jennings, Sarah; Little, Lorne Richard; Macher, Claire; Mills, David Jonathan; Noussair, Ahmed; Pascoe, Sean; Pereau, Jean-christophe; Sanz, Nicolas; Schwarz, Anne-maree; Smith, Tony; Thebaud, Olivier.
Reconciling food security, economic development and biodiversity conservation is a key challenge, especially in the face of the demographic transition characterizing many countries in the world. Fisheries and marine ecosystems constitute a difficult application of this bio-economic challenge. Many experts and scientists advocate an ecosystem approach to manage marine socio-ecosystems for their sustainability and resilience. However, the ways by which to operationalize ecosystem-based fisheries management (EBFM) remain poorly specified. We propose a specific methodological framework-viability modelling-to do so. We show how viability modelling can be applied using four contrasted case-studies: two small-scale fisheries in South America and Pacific and two...
Tipo: Text
Palavras-chave: Biodiversity; Ecological economics; Ecosystem approach; Fisheries; Scenario; Viability.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00409/52009/52724.pdf

A stochastic viability approach to ecosystem-based fisheries management
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Doyen, Luc; Thebaud, Olivier; Bene, Christopher; Martinet, V.; Gourguet, S.; Bertignac, Michel; Fifas, Spyros; Blanchard, Fabian.
Academia and management agencies show a growing interest for ecosystem-based fishery management (EBFM). However, the way to operationalize this approach remains challenging. The present paper illustrates how the concepts of stochastic co-viability, which accounts for dynamic complexities, uncertainties, risk and sustainability constraints, can be useful for the implementation of EBFM. In the present case, this concept is used to identify fishing strategies that satisfy both ecological conservation and economic sustainability in a multi-species, multi-fleet context. Economic Viability Analysis (EVA) and the broader Co-Viability Analysis (CVA), are proposed to expand the usual Population Viability Analysis (PVA) and precautionary approach. An illustration is...
Tipo: Text
Palavras-chave: Ecosystem based fisheries management; Viability; Stochastic; Nephrops; Hake.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00074/18571/16153.pdf

Fishery externalities and biodiversity: Trade-offs between the viability of shrimp trawling and the conservation of Frigatebirds in French Guiana
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martinet, Vincent; Blanchard, Fabian.
Sustainable management of natural resources, and in particular fisheries, must take into account several conflicting objectives. This is the case in the French Guiana shrimp fishery for which profitability objectives imply a reduction in the fishing activity. On the one hand, this fishery has negative externalities on marine biodiversity due to discards. On the other hand, this fishery has positive externalities on the economy of the local community and interestingly enough on a protected seabird species in the area (the Frigatebird that feeds on discards). In this paper, we examine the viability of that system considering two sustainability objectives: an economic objective in terms of the profitability of the fishing activity, and a conservation...
Tipo: Text
Palavras-chave: Bio-economic modeling; Viability; Sustainability; Fishery externalities; Species conservation.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00020/13135/10195.pdf

Ecoviability for small-scale fisheries in the context of food security constraints
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cisse, Abdoul; Doyen, L.; Blanchard, Fabian; Bene, Christophe; Pereau, J. -c.
This paper applies a stochastic viability approach to a tropical small-scale fishery, offering a theoretical and empirical example of ecosystem-based fishery management approach that accounts for food security. The model integrates multi-species, multi-fleet and uncertainty as well as profitability, food production, and demographic growth. It is calibrated over the period 2006–2010 using monthly catch and effort data from the French Guiana's coastal fishery, involving thirteen species and four fleets. Using projections at the horizon 2040, different management strategies and scenarios are compared from a viability viewpoint, thus accounting for biodiversity preservation, fleet profitability and food security. The analysis shows that under certain...
Tipo: Text
Palavras-chave: Small-scale fishery; Biodiversity; Sustainability; Profitability; Food security; Multi-species; Multi-fleet; Stochasticity; Viability; Scenario.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00276/38732/37310.pdf

Is a management framework based on spawning-stock biomass indicators sustainable ? A viability approach
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Lara, Michel; Doyen, Luc; Guilbaud, Therese; Rochet, Marie-joelle.
Fisheries management agencies have to drive resources on sustainable paths, i.e. within defined boundaries for an indefinite time. The viable-control approach is proposed as a relevant method to deal with sustainability. We analyse the ICES precautionary approach (PA) by means of the notion of viability domain, and provide a mathematical test for sustainability. It is found that the PA based on spawning-stock biomass (SSB) and fishing mortality (F) indicators is sustainable only when recruits make a significant contribution to SSB. In this case, advice based upon SSB, with an appropriate reference point, is sufficient to ensure sustainability. In all other cases, SSB is not a sufficient metric of stock productivity and must be complemented with other...
Tipo: Text
Palavras-chave: Viability; Sustainable management; Indicators; ICES precautionary approach.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2821.pdf

ATP content and viability of spermatozoa drive variability of fertilization success in the Pacific oyster ( Crassostrea gigas )
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boulais, Myrina; Soudant, Philippe; Le Goic, Nelly; Quere, Claudie; Boudry, Pierre; Suquet, Marc.
Fertilization of the oocyte is a critical process of sexual reproduction depending among other factors on spermatozoa functionality. Mitochondria participate in many crucial processes for spermatozoa motility and fertilizing ability. The Pacific oyster, Crassostrea gigas, is characterized by a high inter-individual variability of its reproductive success which has been shown to be partially due to the variability of gamete quality. The present study explored spermatozoa characteristics such as: i) relationships among mitochondrial functionality (ATP content, mitochondrial membrane potential (MMP), reactive oxygen species production); sperm viability (percentages of live, dying, and dead); and motility; and ii) their involvement in inter-oyster variability...
Tipo: Text
Palavras-chave: Spermatozoa; Quality; Motility; Viability; ATP content; ROS production.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00386/49769/50309.pdf

Stress factors resulting from the Arctic vernal sea-ice melt : Impact on the viability of bacterial communities associated with sympagic algae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amiraux, Rémi; Burot, Christopher; Bonin, Patricia; Massé, Guillaume; Guasco, Sophie; Babin, Marcel; Vaultier, Frédéric; Rontani, Jean-françois.
During sea-ice melt in the Arctic, primary production by sympagic (sea-ice) algae can be exported efficiently to the seabed if sinking rates are rapid and activities of associated heterotrophic bacteria are limited. Salinity stress due to melting ice has been suggested to account for such low bacterial activity. We further tested this hypothesis by analyzing samples of sea ice and sinking particles collected from May 18 to June 29, 2016, in western Baffin Bay as part of the Green Edge project. We applied a method not previously used in polar regions—quantitative PCR coupled to the propidium monoazide DNA-binding method—to evaluate the viability of bacteria associated with sympagic and sinking algae. We also measured cis-trans isomerase activity, known to...
Tipo: Text
Palavras-chave: Bacteria; Sea ice; Sympagic algae; Ice biota; Viability; Stress factors; Salinity; Bactericidal free fatty acids; Carbon export.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00681/79329/81840.pdf

First study in cryopreserved Crassostrea angulata sperm
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Riesco, Marta F.; Felix, Francisca; Matias, Domitilia; Joaquim, Sandra; Suquet, Marc; Cabrita, Elsa.
Sperm cryopreservation is a widely employed technique that promotes alternative techniques to contribute to broodstock management or restoration programs for species of commercial interest, endangered species or species with an interesting genotype. The preservation of genetic material from improved stocks or from the original population is extremely important for the oyster aquaculture industry to prevent the potential impacts of epidemic diseases and natural disasters. The Portuguese oyster, Crassostrea angulata, was the most important species commercialized by the shellfish industry. However, inadequate management of this industry and pathology occurrences resulted in a significant decrease in natural populations. For this reason, in this work a...
Tipo: Text
Palavras-chave: Crassostrea angulata; Sperm; Cryopreservation; Motility; Viability; Fertilization.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00333/44432/44098.pdf

Flow cytometric assessment of morphology, viability, and production of reactive oxygen species of Crassostrea gigas oocytes. Application to Toxic dinoflagellate (Alexandrium minutum) exposure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Goic, Nelly; Hegaret, Helene; Boulais, Myrina; Beguel, Jean-philippe; Lambert, Christophe; Fabioux, Caroline; Soudant, Philippe.
The Pacific oyster Crassostrea gigas accounts for a large part of shellfish aquaculture production worldwide. Aspects of morphological and functional characteristics of oyster oocytes remain poorly documented, and traditional techniques, such as microscopic observations of shape or fertilization rate, are time and space consuming. The purpose of this study was to assess for the first time viability and reactive oxygen species (ROS) production of Pacific oyster oocytes using flow cytometry (FCM) and to apply this method to determine oocyte responses to in vitro exposure to the toxic dinoflagellate Alexandrium minutum. A culture of A. minutum caused a significant increase in oocyte ROS production, which gradually increased with the age of the culture, but...
Tipo: Text
Palavras-chave: Pacific oyster; Gamete quality; ROS production; Viability; Flow cytometry; Ecotoxicology.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00216/32760/31321.pdf

Monotonicity properties for the viable control of discrete-time systems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: De Lara, Michel; Doyen, Luc; Guilbaud, Therese; Rochet, Marie-joelle.
This paper deals with the control of nonlinear systems in the presence of state and control constraints for discrete-time dynamics in finite-dimensional spaces. The viability kernel is known to play a basic role for the analysis of such problems and the design of viable control feedbacks. Unfortunately, this kernel may display very nonregular geometry and its computation is not an easy task in general. In the present paper, we show how monotonicity properties of both dynamics and constraints allow for relevant analytical upper and lower approximations of the viability kernel through weakly and strongly invariant sets. An example on fish harvesting management illustrates some of the assertions.
Tipo: Text
Palavras-chave: Monotonicity; Invariance; Viability; State constraints; Control.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2405.pdf

Sperm Motility and Viability in West African Dwarf Rams Treated with Euphorbia hirta
Provedor de dados: International Journal of Morphology
Autores: Oyeyemi,M. O; Olukole,S. G; Taiwo,Bolanle; Adeniji,Deborah A.
Four adult sexually matured and clinically healthy West African Dwarf (WAD) rams aged between 24 and 30 months were used for the study. The rams were first used as control and later as experimental animals upon being orally dosed with Euphorbia hirta extract at 400mg/kg body weight for 14 days. Semen samples were collected from the rams a day after the administration of the plant extra and seven days after. The objective of the study was to investigate the effect of Euphorbia hirta on the semen picture of WAD rams. There were significantly differences (P &lt;0.05) in the semen picture as reflected in a reduction of sperm motility from 80% to 47.5% and live-dead ratio from 90.75% to 32.5% in the control and post-experimental stages of the study...
Tipo: Journal article
Palavras-chave: Sperm motility; Ram; Viability; Euphorbia hirta.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200024

ALT-C, a disintegrin-like Cys-rich protein from Bothrops alternatus, increases skeletal myoblast viability
Provedor de dados: Journal of Venomous Animals and Toxins Including Tropical Diseases
Autores: Mesquita-Ferrari,RA; Moraes,CK de; Micocci,KC; Selistre-de-Araújo,HS.
ALT-C, an ECD motif (glutamic acid, cysteine, aspartic acid) disintegrin from Bothrops alternatus snake venom, induces α2β1 integrin-mediated signaling and neutrophil chemotaxis. In vitro, in human umbilical vein endothelial cells (HUVEC), ALT-C induces cell proliferation, thus showing an interesting potential for tissue regeneration studies. This work aimed to evaluate the influence of ALT-C in myoblast viability and differentiation. Myoblasts were obtained from hind limb muscles of 3 to 4-day old Wistar rats. The cells were incubated with ALT-C at different concentrations and incubation periods were followed by total RNA isolation. cDNA synthesis and real time polymerase chain reaction (PCR) were performed with primers of myoD as well as of both (slow...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Viability; Myosin heavy chain; Myoblast; Disintegrin; Skeletal muscle; Bothrops alternatus.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000200013

Influencia del tiempo de conservación por liofilización en cepas del género penicillium de utilidad en la industria alimenticia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Godínez, S.; Calderón, M.
Se realizó la evaluación de 10 cepas de hongos filamentosos pertenecientes a la especie Penicillium camemberti de utilidad en la elaboración de quesos Camembert y conservadas por liofilización entre 10 y 20 años en un banco de cepas. El estudio comprendió la determinación de porcentaje de retención de viabilidad, crecimiento en medio sólido, características macromorfológicas, características micromorfológicas, capacidad proteolítica y lipolítica. Los resultados mostraron que el empleo de este método aseguró una supervivencia de 100 % de las cepas, no detectándose alteraciones en sus características macromorfológicas y micromorfológicas. Los cultivos mantuvieron sus características de crecimiento y actividad enzimática.
Tipo: Journal Contribution
Palavras-chave: Growth; Growth; Enzyme activity; Viability.
Ano: 2008
URL: http://hdl.handle.net/1834/4842

Effect of substrate, color and size on germination and vigor of Melanoxylon brauna seeds
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Flores, Andressa Vasconcelos; Borges, Eduardo Euclydes de Lima e; Gonçalves, José Francisco de Carvalho; Guimarães, Valéria Monteze; Ataíde, Glauciana da Mata; Barros, Daniela de Pádua; Pereira, Márcio Dias.
The objective of this work was to investigate the effect of substrate, color and size on the germination and vigor of Melanoxylon brauna seeds. It was performed two essays. In the first, the seeds were classified by color (light and dark) and size (small and large). In the second essay, it was investigated the influence of substrates on sand, between sand, above paper, between paper and in paper rolls, type germitest. In both essays, the seeds were maintained in controlled conditions (light and temperature) during 10 days. The percentage of germination and germination speed index (GSI) were calculated. Furthermore, it was determined the weight of 1,000 seeds and the germination of the species was characterized by observation until the seedling formation....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Physiology; Viability; Propagation; Morphology Silvicultura - sementes florestais Fisiologia; Viabilidade; Propagação; Morfologia.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/558

Avaliação de danos causados por percevejos em sementes de Jatropha curcas
Provedor de dados: PFB - Pesquisa Florestal Brasileira
Autores: Schulz, Deisinara Giane; schneider, Cristina Fernanda; Brand, Fabiane Cristina Gusatto; Malavasi, Ubirajara Contro; Malavasi, Marlene de Matos.
O presente trabalho objetivou identificar danos causados por percevejos em sementes de pinhão-manso por meio do teste de tetrazólio. As sementes foram imersas em água por 16 horas. Após a retirada do tegumento, os albumens foram submersos em solução de tetrazólio na concentração de 0,5% por 4 horas a 40±2 ºC em BOD na ausência de luz, e avaliados de acordo com os níveis de viabilidade e danos causados por percevejos. O teste de tetrazólio foi eficiente para avaliar a viabilidade das sementes de pinhão-manso, permitindo a interpretação do vigor e danos causados por percevejos
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pinhão-manso; Viabilidade; Vigor; Pachycoris torridus Physic nut; Viability; Vigor; Pachycoris torridus.
Ano: 2012
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/330

Longevity of Horseweed Seed Bank Depending on the Burial Depth
Provedor de dados: Planta Daninha
Autores: VARGAS,A.A.M.; AGOSTINETTO,D.; ZANDONÁ,R.R.; FRAGA,D.S.; AVILA NETO,R.C.
ABSTRACT: Horseweed (Conyza spp.) is considered as one of the major weeds occurring in the agricultural areas of South America, especially in Brazil. This species stands out from the other weeds due to characteristics such as large seed production, continued seed production, dispersion over long distances and resistance to 5-enolpyruvoylshikimate 3-phosphate (EPSP) and acetolactate synthase (ALS) inhibiting herbicides, features that increase their management. Therefore, this study aimed at determining the physiological quality and longevity of horseweed seeds over 12 months. The experiment was established under field conditions, using a randomized block design with four replications. Fifty horseweed seeds were distributed into 50 g of dry soil, placed in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conyza spp.; Survival; Dormancy; Germination; Viability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100249

PHYSIOLOGICAL QUALITY OF SOYBEAN SEEDS DEPENDING ON THE PREHARVEST DESICCATION
Provedor de dados: Planta Daninha
Autores: PEREIRA,T.; COELHO,C. M. M.; SOBIECKI,M.; SOUZA,C. A.
ABSTRACTDepending on the cultivar, the use of desiccants in the preharvest can favor maintenance of physiological quality. The objective of the study was to assess the physiological quality of soybean seeds as due to the use of apreharvest desiccant and desiccation time in two harvests (2011/12 and 2012/13). The treatments were five soybean cultivars, two growth stages of application, a control (without desiccant application), and three desiccants (glufosinate-ammonium, carfentrazone-ethyl and paraquat) (2011/12 harvest). In the 2012/13 harvest the carfentrazone-ethyl desiccant was replaced by diquat. The physiological quality of seeds was assessed by the percentage of viability and vigor (cold test, tetrazolium test and accelerated aging test). In 2011/12...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Viability; Desiccant; Vigor.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300441

ANÁLISE COMPARATIVA DA VIABILIDADE ECONÔMICA DOS SISTEMAS DE PRODUÇÃO CONVENCIONAL E INTEGRADO DE CAFÉ
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Pereira,   Vanessa da Fonseca; Mendonca,   Talles Girardi de; Reis,   Bricio dos Santos.
Due to growing consumer demands regarding product quality and the social and environmental aspects of the production process, there is a need to redefine the agricultural productive structure so as to make it sustainable. The Integrated Production System in Coffee (CIP) aims to meet these new requirement standards. The system, however, is still very recent and requires more detailed studies to identify its strengths and weaknesses. Therefore, the objective of this work is to carry out a comparative analysis of the economic viability and the risk associated to the conventional and integrated systems of coffee production in the farm property of São João, in the Coimbra district in Minas Gerais state. The method used was the calculation of the viability and...
Tipo: Journal Article
Palavras-chave: Coffee; Integrated production; Viability; Risk; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2008
URL: http://purl.umn.edu/61726

Quality Differentiation as a Strategy for the Viability of Traditional Olive Farming in Trás-os-Montes Region
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Baptista,   Alberto; Biswas,   Pradip.
Despite special quality of the olive oil of Trás-os-Montes (TM), producers fail to create niche market and raise price commensurate with the high cost. Some local manufacturers made some attempts to establish special brands for their oil and the association of the local producers (AOTAD) made the required efforts to bring the product of the region under PDO, designated as Azeite de Trás-os-Montes DOP. Only a small part of the marketed product is sold under PDO (4%) and a fraction of which is sold under some brand till date. The cost structure of olive oil depends on multiple factors - the type of production system (traditional or intensive), plant variety, inclination of plots and productivity, among others. The harvesting cost in general represents more...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive Oil in Trás-os-Montes; Quality Differentiation; Viability; Traditional Farming; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/95325

PARTICIPAÇÃO, VIABILIDADE E SUSTENTABILIDADE: DIMENSÕES DE DESENVOLVIMENTO LOCAL NUMA ASSOCIAÇÃO DE PRODUTORES RURAIS
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Carvalho,   Daniela Moreira de; Rios,   Gilvando Sa Leitao.
The agribusiness unfolds in the rural Brazilian environment as one of the most efficient and competitive in the world but the rural poverty also blunts as one of the largest social blemishes for the society. The methodology applied was the study case, a milk producers’ association, comprehending some observation, semi-structured interviews and informal conversations. The study has evidenced that the association accomplishes several development indicators, job and income generation, access to rural credit, access to new technologies and important institutional partnerships. However, the association inclusion is still very limited to the associates and the social sustainability is fragile (there is an incidence of objective participation and low subjective...
Tipo: Journal Article
Palavras-chave: Participation; Viability; Sustainability and associativism.
Ano: 2007
URL: http://purl.umn.edu/43703

Financial costs and benefits of investing in domesticated “Sonkyi” (Allanblackia spp) in the forest region of Southern Ghana
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Egyir,   Irene Susana; Kwadzo,   George Tsey-Mensah.
The integration of “Sonkyi” Allanblackia spp into cocoa farming systems has been initiated in Southern Ghana.  Currently, it is a collection activity although its domestication is being championed by Unilever R&amp;D Netherlands in collaboration with the Forestry Research Institute of Ghana.  Feasibility studies suggest that the venture is viable for farmers if the financial support assurances by Uniliver would be sustained.  It is important to assess the feasibility of ‘no support’ so that those private sector entrepreneurs who want to venture into this activity would understand the real cost and return issues.  This paper presents the results of a financial cost-benefit appraisal of AB investment in the Western Region of Ghana. Using alternate viability...
Tipo: Journal Article
Palavras-chave: Allanblackia; Tree crop; Financial benefit-cost analysis; Viability; Profitability; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/95783

Análise de arranjos para extração de óleos vegetais e suprimento de usina de biodiesel
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Sartori,   Marco Antonio; Perez,   Ronaldo; da Silva Junior,   Aziz Galvao; Machado,   Silvia Regina Sartori; Santos,   Manoela Maciel de Souza; Miranda,   Carlos Alberto de Castro.
This study aimed at the technical-economical evaluation of implanting some vegetal-oil extraction units in order to insert the family agriculture into bio-diesel production chain. Three project models (arrangements) for vegetal-oil extraction units at different sizes were proposed, using extraction by pressing and mixed extraction (extracting by either pressing or solvent) and different raw materials (castor-oil and soybean). For the size analysis, the oil production scales between 50/60 tons/day were used with real market data concerning investments, inputs prices of the process, raw materials and vegetal oil. For the economic analyses, the software BioSoft was used. The BioSoft is a program for supporting the decision-making process, which was developed...
Tipo: Journal Article
Palavras-chave: Vegetal oil; Extraction; Viability; Crop Production/Industries; L25; D81; L69.
Ano: 2009
URL: http://purl.umn.edu/60807

Tolerância à dessecação e armazenamento de sementes de Caesalpinia echinata Lam. (pau-brasil), espécie da Mata Atlântica
Provedor de dados: Revista Brasileira de Botânica
Autores: BARBEDO,CLAUDIO  J.; BILIA,DENISE A.C.; FIGUEIREDO-RIBEIRO,RITA DE CÁSSIA L.
A exploração descontrolada do pau-brasil reduziu sua distribuição original a pequenos remanescentes na atualidade. O conhecimento da fisiologia da unidade de dispersão da espécie pode contribuir para a ampliação de seu cultivo, uso racional e conservação. A sensibilidade das sementes à dessecação foi avaliada em sementes recém-colhidas, separadas em quatro categorias (estádios I, II, III e IV), segundo avaliação visual de tamanho e cor. Sementes de cada estádio foram submetidas a secagem a 40 °C e a 50 °C, até que o teor de água atingisse 8% (base úmida). A capacidade de manutenção da viabilidade das sementes durante o armazenamento foi avaliada em diferentes embalagens (permeável, semi-permeável e impermeável), em ambiente natural (22 ± 7 °C) ou em câmara...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drying; Longevity; Orthodox seeds; Viability.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000007

Physalis peruviana seed storage
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Souza,Cíntia L. M. de; Souza,Manuela O. de; Oliveira,Ronaldo S.; Pelacani,Claudineia R.
ABSTRACT Physalis peruviana belongs to Solanaceae family and has a high nutritional and nutraceutical potential. The production is intended for fruit consumption and the propagation is mainly by seeds. This study aimed to evaluate the influence of priming on the kinetics of germination of P. peruviana seeds stored at different temperatures. The seeds were stored at 5 and 25 °C in a chamber saturated with zinc chloride solution and in liquid nitrogen (-196 °C). Every 4 months, the seeds were removed from storage for evaluation of germination and moisture content in the laboratory and emergence and development of seedlings in greenhouse. During the last evaluation at 16 months, the seeds under the same conditions were subjected to salt stress. The moisture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Priming; Cryopreservation; Salt solution; Viability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300263

Physiological and sanitary quality of soybean seeds under different chemical treatments during storage
Provedor de dados: Revista Brasileira de Engenharia Agrícola e Ambiental
Autores: Conceição,Gerusa M.; Lúcio,Alessandro D.; Mertz-Henning,Liliane M.; Henning,Fernando A.; Beche,Manoela; Andrade,Fabricio F. de.
ABSTRACT The purpose of this study was to evaluate the effect of the chemical treatment with fungicide, insecticide, micronutrient and polymer on physiological and sanitary quality of soybean seeds during storage. The treatments were arranged in a 3 x 5 x 5 factorial scheme (cultivars x seeds treatment x storage period), in completely randomized design with four replicates. Three cultivars were used: NA 4823RG, BMX TurboRR and Fundacep 62RR. The treatments were: T1: no chemical treatment, T2: fungicide, insecticide and micronutrient; T3: fungicide, insecticide, micronutrient and polymer, T4: fungicide; T5: insecticide. After the chemical treatment, the seeds were stored under environmental conditions from May to December 2012, and seed quality was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Chemical treatment; Viability.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001101020

Physiological potential of seeds and morphological characterization of Campomanesia adamantium seedlings
Provedor de dados: Revista Brasileira de Fruticultura
Autores: Leão-Araújo,Érica Fernandes; Souza,Eli Regina Barboza de; Peixoto,Nei; Gomes-Júnior,Francisco Guilhien.
Abstract  The cultivation of native fruit species depends on the existence of consistent technical and scientific information on the germination and vigor of seeds for efficient management by seedling producers. The evaluation of the physiological potential of seeds is performed through germination and vigor tests, which must be standardized to ensure the generation of accurate information. For Campomanesia adamantium, information on parameters for conducting physiological tests is scarce. The aims of this work were (i) to evaluate the effect of temperature and seed positioning on the substrate for seed germination and vigor, and (ii) to characterize and describe the essential structures and main types of seedling abnormality. After harvest, fruits were...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Abnormal seedling; Gabiroba; Temperature; Viability; Vigor.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000402001

Lolium Multiflorum seeds in the soil: II. Longevity under natural conditions
Provedor de dados: Revista Brasileira de Sementes
Autores: Maia,Fernanda Costa; Maia,Manoel De Souza; Bekker,Renée M.; Berton,Rogério Previatti; Caetano,Leandro Sebastião.
The interest was the seed longevity dynamics of annual ryegrass in natural conditions as an important tool to explain its dynamics in no tillage systems used in the South of Brazil. The species is commonly managed for natural re-sowing and, in this way, allows cattle grazing with reduced costs during the winter time. In February of 2003, twenty bags of nylon screen containing sterilised soil with 100 seeds in each were randomly buried in the field, 5 cm deep. Around every three or four months, four sacks were exhumed. Seeds were counted and tested using germination and tetrazolium tests.The seeds showed high primary dormancy, which was overcome very fast. After 108, 226, 326, 565 and 732 days of burial there were no significant differences as the secondary...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annual ryegrass; Persistence; Viability; Dormancy; Buried seeds.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222009000200014

Seed quality parameters of three interspecific hybrids of elephant grass x pearl millet
Provedor de dados: Revista Brasileira de Sementes
Autores: Pozitano,Marina; Usberti,Roberto.
An interspecific hybrid resulting from the crossing of elephant grass (Pennisetum purpureum Schumach) x pearl millet (Pennisetum glaucum (L.) R. Brown) has been developed. This hybrid, however, revealed low phenotypic uniformity and low production of pure seeds. Through recurrent selection, two improved populations were obtained (genotypes Corte and Pastoreio). The aim of this study was assessing seed quality of the three hybrids (genotypes Corte, Pastoreio and Paraiso) by tests of: seed purity; seed germination; accelerated aging test, at 42 ºC; 1,000 seeds weight; drying curves; and sorption and desorption isotherms. Recurrent selection altered the seed size and increased initial quality of population for genotype Pastoreio. Drying curves for the three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pennisetum purpureum; Pennisetum glaucum; Drying; Viability.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300004

Physiological quality, content and activity of antioxidants in soybean seeds artificially aged
Provedor de dados: Revista Brasileira de Sementes
Autores: Ávila,Marizangela Rizzatti; Braccini,Alessandro de Lucca e; Souza,Cristina Giatti Marques de; Mandarino,José Marcos Gontijo; Bazo,Gabriel Loli; Cabral,Yara Camila Fabrin.
The objective of this study was to evaluate physiological quality, content, and activity of antioxidants, in soybean seeds subjected to accelerated aging during different periods. Seeds of cultivars BRS 258, BRS 262 and BRS 268, subjected to accelerated aging during 12, 24, 36 and 48 hours and non-aged seeds were used. After each aging period, the seed were evaluated by tests of: germination; first count and tetrazolium. The total of phenolic compounds, total flavonoides, total of isoflavones, and activity for eliminating ABTS●+ radicals were quantified. There were differences among cultivars according to vigor and viability only after seeds were aged. Cultivars BRS 158 and BRS 268 have shown better seed physiological quality in each aging period; however,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Isoflavones; Glycine max; Phenolic compounds; Viability; Vigor.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222012000300006

Reserve mobilization during imbibition of stored Gliricidia sepium (Jacq.) Steud. (Leguminosae - Papilionoideae) seeds
Provedor de dados: Revista Brasileira de Sementes
Autores: Reis,Renata Conduru Ribeiro; Dantas,Bárbara França; Castro,Renato Delmondez de; Antunes,Cimille Gabrielle Cardoso; Silva,Fabrício Francisco Santos da; Pelacani,Claudinéia Regina.
Gliricidia sepium is a drought-tolerant species, easily multiplied by seeds, and has been exploited by farmers as a source of forage in the semi-arid region of northeast Brazil. The objective of the present study was to evaluate the effect of seed storage on the mobilization of reserves during imbibition of "Gliricidia" seeds. Freshly-harvested seeds were packed in kraft paper bags and stored for three and six months in the laboratory under ambient conditions (25 º C ± 3 T and 75% ± 3 RH). Cotyledons were isolated from imbibed seeds and macerated for the extraction and quantification of total soluble sugars, reducing sugars, sucrose and starch, as well as of proteins, amino acids and for amylase activity. Storage under these conditions resulted in an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macromolecules; Longevity; Viability; Germination; Water content.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222011000300018

Development and characterization of probiotic fermented smoothie beverage
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Gallina,Darlila Aparecida; Barbosa,Paula de Paula Menezes; Ormenese,Rita de Cássia Salvucci Celeste; Garcia,Aline de Oliveira.
ABSTRACT Dairy products are the primary delivery for probiotics, with great popularity among the public looking for functional foods. The addition of probiotics to new food matrices requires studies about the stability and viability of these microorganisms in the final product. This study aimed to develop a probiotic smoothie beverage and to evaluate the microbiological quality, pH, acidity, syneresis, probiotics viability, sensory acceptance, and consumers’ preference. For that, thirty-six beverage formulations were prepared using yogurt and different fruit pulps. Six formulations were selected for the study, as follows: probiotic yogurt with the addition of mango pulp, grape, red fruits (containing 8 and 10% sucrose), mango/passion fruit, and red...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yogurt; Bifidobacteria; Viability; Acceptance; Fruit Pulp.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300378

Physiological quality evaluation of Piptadenia stipulacea (Benth.) Ducke seeds by tetrazolium test
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Pereira,Kleane Targino Oliveira; Paiva,Emanoela Pereira de; Souza Neta,Maria Lilia de; Benedito,Clarisse Pereira; Torres,Salvador Barros.
ABSTRACT The tetrazolium test is one of the promising alternatives to determine the viability of dormant, recalcitrant and slow-germinating seeds. The objective of this study was to adapt the tetrazolium test methodology to estimate the viability and vigor of Piptadenia stipulacea (Benth.) Ducke seeds. For this, a sample of seeds was classified into three sublots using round sieves, corresponding to six, five and four millimeters in diameter, respectively. Moisture content, imbibition curve, germination, emergence, germination and emergence speed indices, mean germination time and seedling emergence were initially evaluated. The second stage was conducted using a completely randomized experimental design, in 3 x 9 factorial scheme, corresponding to three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fabaceae; Biochemical test; Viability; Forestry species; Triphenyl formazan.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100419

Storage of sunflower seeds
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Lima,Denise de Castro; Dutra,Alek Sandro; Pontes,Felipe Moura; Bezerra,Francisco Thiago Coelho.
The sunflower is among the top five crops in the world for the production of edible vegetable oil. The species displays rustic behavior, with an excellent edaphic and climatic adaptability index, being able to be cultivated throughout Brazil. Seed quality is the key to increasing production and productivity in the sunflower. The objective of this work was to monitor the viability of sunflower seeds with a view to their conservation when stored in different environments and packaging. The seeds were packed in paper bags, multilayered paper, black polyethylene and PET bottles; and stored for a period of twelve months in the following environments: dry cold room (10 ºC and 55% RH), the ambient conditions of Fortaleza, Ceará, Brazil (30-32 ºC and 75% RH),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annus L.; Packaging; Viability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200018

Tetrazolium test for the viability of gherkin seeds
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Paiva,Emanoela Pereira de; Torres,Salvador Barros; Almeida,João Paulo Nobre de; Sá,Francisco Vanies da Silva; Oliveira,Renata Ramayane Torquato.
ABSTRACT The tetrazolium test is a quick and effective method for evaluating viability in seeds. The aim of this study was to determine a methodology for using the tetrazolium test, and its efficiency in verifying viability in seeds of the gherkin (Cucumis anguria L.). Consequently, five batches of gherkin seed were initially evaluated by the tests for germination, first count and speed of germination. The batches were then subjected to treatments in order to adjust the methodology for the tetrazolium test, evaluating three concentrations of tetrazolium solution (0.100, 0.075 and 0.050%), kept in the dark for two, four and six hours, under temperatures of 35 °C and 40 °C, with four replications of 25 seeds per treatment. At the end of the staining period,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis anguria; Viability; Vigour; Quick test.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100118

EVALUATION OF THE VIABILITY OF PLEUROTUS SPP. STRAINS AFTER LIQUID NITROGEN CRYOPRESERVATION
Provedor de dados: Revista de Microbiologia
Autores: Lara-Herrera,Isabel; Mata,Gerardo; Gaitán-Hernández,Rigoberto.
Viability of 6 mushroom strains of the Pleurotus genus (2 from P. djamor var. djamor, 1 from P. ostreatus var. ostreatus, 2 from P. ostreatus var. columbinus and 1 from P. pulmonarius) after liquid nitrogen cryopreservation (-196º) was evaluated. The contact time for the mycelia of these strains with the cryoprotectant (glycerol) was studied 1, 2 and 3 hours before freezing. We also tested the effect of different times (5, 10 and 15 minutes) and temperatures (30, 45 and 60ºC) of the thawing system for mycelial recovery. The results showed a marked tendency toward faster mycelial recovery when samples were thawed at 30ºC, while at 60ºC no recovery was observed. A change in thawing and contact times with the cryoprotectant did not affect the results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pleurotus; Viability; Liquid nitrogen; Mushroom.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300009

Post-thaw acrosomal viability and reaction in sperm obtained from equine epididymis tail
Provedor de dados: Revista de Salud Animal
Autores: Hernández,P.J.E; Fernández,R.F; Rodríguez,S.J.L; Soto,M.Y.G; Verona,J.E.H; García,R.A.D.
In order to evaluate the post-thaw effect on acrosomal viability and reaction of sperm collected from equine epididymis tail, 62 testes were collected and transported at 4°C. Epididymis was dissected to perform the retrograde flushing of the epididymis tail , using 10 mL of a diluent based on skim milk (INRA 82). The diluent obtained with the spermatic content was recovered in graduated collecting tubes and 1mL of each sample was taken to be evaluated. For evaluations, the samples having a minimum of 30% of progressive motility were selected. The evaluations were on: percentage of live sperm, normal morphology, sperm concentration, percentage of live sperm without acrosomal reaction (VsRA) and live with acrosomal reaction (VcRA), evaluating this indicator...
Tipo: Journal article
Palavras-chave: Cryopreservation; Viability; Acrosomal reaction; FITC-PNA/IP; Sperm; Epididymis; Equine.
Ano: 2012
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000200004

Effect of cryopreservation of sheep semen related to its viability and acrosomal status
Provedor de dados: Revista de Salud Animal
Autores: Hernández,P.J.E; Fernández,R.F; Rodríguez,S.J.L; Juárez,R.E; Soto,M.Y.G; García,R.A.D.
In the present research, the effects of cryopreservation on the viability and acrosomal status of sheep sperms were analyzed. Forty five ejaculates were obtained by the artificial vagina method for analysis, evaluating in fresh semen the following characteristics: volume (Vol), progressive motility (PM), viability percentage (Viab), normal morphology (NM), spermatic concentration (Concentr); as well as its viability and acrosomal status, The last two parameters were evaluated staining with fluorescein isothiocyanate conjugated with Arachis hypogaea lectin and propidium iodide (FITC-PNA/IP), in which there were different patterns of staining: live sperms without acrosomal reaction (VsRA), live with acrosomal reaction (VcRA), dead without acrosomal reaction...
Tipo: Journal article
Palavras-chave: Cryopreservation; Viability; Acrosomal reaction; FITC-PNA/IP; Sheep semen.
Ano: 2012
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000200003

Effect of mini-sprinkler irrigation system on Heterorhabditis baujardi LPP7 (Nematoda: Heterorhabditidae) infective juvenile
Provedor de dados: Scientia Agricola
Autores: Lara,Juan Carlos; Dolinski,Cláudia; Sousa,Elias Fernandes de; Daher,Rogério Figueiredo.
Entomopathogenic nematodes (EPNs) are currently being used as successful biological control agents of soil-dwelling insect pests. Previous field and greenhouse studies demonstrated that application techniques and non-biotic factors (temperature and pressure) have a significant effect on EPNs efficacy. The objective of this study was to evaluate the influence of an irrigation spray application system on the viability, infectivity and host search capability of Heterorhabditis baujardi LPP7 (Nematoda: Heterorhabditidae) infective juveniles (IJ). Two assays were proposed. Their viability was evaluated under the microscope after the IJ passed through the irrigation system. Infectivity on Galleria mellonella larvae, and host search capability, as evidenced by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological pest control; Application technology; Viability; Infectivity; Search capability.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400017

ความมีชีวิตและการเปลี่ยนแปลงคุณภาพของข้าวกล้อง
Provedor de dados: Thai Agricultural Research Repository
Autores: Anchalee Prasertsak; Sunanta Wongpiyachon; Siriwan Tangwisuttijit; Suparat Kositchareonkul; Lamaimaat Youngsuk.
Viability and quality changes of brown rice are important to find out the appropriate approach of brown rice management in trade. Two experiments, (1) Survey on viability and qualities of brown rice in trade and (2) Longevity and quality changes of brown rice after harvest, were carried out in Pathum Thani Rice Research Center during 2002-2004. Viability of brown rice sampled from millers and exporters at the range of 0, 1-25, 26-50 and 80-100% were found at 5, 6, 12, 23 and 54%, respectively. Low amylose content, soft gel consistency and 1-2 aromatic level were found in all samples. Free fatty acid was 14.04-50.78 mg KOH/100 g starch. Aflatoxin B1 of the samples were detected in the range of 0-11 ppb which were below maximum level against standard (20...
Tipo: Collection
Palavras-chave: ฺBrown rice; KDML 105; Storage time; Viability; Quality changes; Aflatoxin B1; Store; Insects damage; ข้าวกล้อง; พันธุ์ขาวดอกมะลิ 105; ความมีชีวิต; การเปลี่ยนแปลงคุณภาพหลังการเก็บเกี่ยว; แอฟลาทอกซิน บี1; การเก็บรักษา; การทำลายของแมลง; คุณภาพ; การจัดการคุณภาพเพื่อการค้า.
Ano: 2007
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5299

Algumas características da reprodução e ontogênese de Epilachna paenulata (Germar) (Coleoptera, Coccinellidae, Epilachninae)
Provedor de dados: Zoologia
Autores: Ganho,Norma G.; Marinoni,Renato C.
Epilachna paenulata (Germar, 1824) was reared feeding on pumpkin leaves (Cucurbita pepo Lourt.) in laboratory conditions at temperatures of 20±0,5ºC, relative humidity of 65±0,5% and 12 hour photoperiod. Groups of fecunded and non-fecunded females were studied. The ovarioles showed four developing stages during egg production, morphologically alike for fecunded and non-fecunded females, but differing in the duration time of the stages. Each ovarium has 24 ovarioles on average, less than any other species known into the genus, and all ovarioles are physiologically active at each oviposition. The mean number of ovarioles is lower when compared with the other species of Epilachninae known. Fecunded and non-fecunded females showed a similar preoviposition...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epilachninae; Reproduction; Ovariole development; Mate influence; Viability.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000200015

Sowing seeds for the future: the need for establishing protocols for the study of seed dormancy
Provedor de dados: Acta Botanica Brasilica
Autores: Silveira,Fernando Augusto Oliveira.
Seed dormancy is a widely misunderstood plant trait. In several research areas, a lack of germination is wrongly assumed to result from seed dormancy. In an attempt to standardize seed dormancy research and improve communication among seed scientists, a straightforward protocol to address the occurrence and causes of seed dormancy is provided. Standardizing communication is not just a theoretical exercise but also has practical implications in agriculture and conservation. Standardization will make studies comparable and hence we will have a deeper understanding of the physiology, ecology and evolution of seed dormancy. A better understanding of the various aspects of seed dormancy will lead to greater appreciation of the biogeographical and phylogenetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dormancy classification system; Viability; Embryoless seeds; Lack of germination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200003

Effects of the hydrogen potential and fungicide treatment on Pitaya seed germination
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Ortiz, Thiago Alberto; Moritz, Aline; Oliveira, Mariana Alves de; Takahashi, Lúcia Sadayo Assari.
The objective of the present study was to evaluate pitaya seed germination under different hydrogen potentials, with or without fungicide treatment. A completely randomized design was employed under a 3 x 13 x 2 factorial scheme, corresponding to three pitaya species (white pitaya, pitaya hybrid I, pitaya hybrid II), thirteen hydrogen potentials (3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, and 9.0) and two fungicide conditions (presence and absence), with four replications. The percentage of germination, germination speed index and mean germination time were evaluated. The data were subjected to ANOVA, and the means were compared using the Scott-Knott test (p &lt; 0.05). The pH influenced the germination speed index in white pitaya. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hylocereus undatus  H; Costaricensis; Carboxim+thiran; Vigor; Viability; Physiological quality Tecnologia e produção de sementes.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18088

The germination of bush mint (Hyptis marrubioides EPL.) seeds as a function of harvest stage, light, temperature and duration of storage - doi: 10.4025/actasciagron.v33i4.4611
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Sales, Juliana de Fátima; Instituto Federal Goiano; Pinto, José Eduardo Brasil Pereira; Universidade Federal de Lavras; Oliveira, João Almir de; Universidade Federal de Lavras; Botrel, Priscila Pereira; Universidade Federal de Lavras; Silva, Fabiano Guimarães; Instituto Federal Goiano; Corrêa, Ricardo Monteiro; Instituto Federal Minas Gerais.
This study evaluated the effect of light, temperature, physiologic stage at harvest and length of time on the germination of Hyptis marrubioides seeds. Two trials were conducted. The first experiment was performed immediately after the seed harvest and consisted of a 2 x 3 x 3 factorial design with 2 environmental conditions (light and dark), 3 temperatures (20, 30 and 20/30ºC) and 3 seed harvest times (green colored seeds, light brown seeds and dark brown seeds). The second experiment was conducted in the presence of light at a temperature of 30ºC and consisted of a 4 x 3 factorial design, with 4 storage times (0, 6, 12 and 18 months) and the 3 three harvest physiologic stages used in the previous experiment. Both of the experiments were conducted in...
Palavras-chave: 5.01.03.00-8 medicinal plant; Viability; Lamiaceae Fitotecnia medicinal plant; Viability; Lamiaceae.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4611

Qualidade fisiológica de sementes de soja submetidas ao hidrocondicionamento - DOI: 10.4025/actasciagron.v30i5.5972
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Giurizatto, Maria Izabel Kruger; Iagro; Robaina, Antonio Dias; UFGD; Gonçalves, Manoel Carlos; UFGD; Marchetti, Marlene Estevão; UFGD.
A técnica de hidratação controlada de sementes vem sendo utilizada como método de condicionamento fisiológico, tanto para sementes deterioradas como para sementes altamente sensíveis à embebição rápida, ou a interação entre ambas, objetivando melhorar o desempenho destas no campo. A hidratação pode ser seguida por secagem, se as sementes não tiverem atingido a fase III da germinação, facilitando, assim, o subseqüente manuseio, armazenamento e semeadura no campo. O objetivo do presente trabalho foi avaliar os efeitos do hidrocondicionamento na qualidade fisiológica de sementes de soja, sendo estas sementes hidrocondicionadas por períodos de 0, 20 e 24h, secas e armazenadas por 0, 90, 180 e 270 dias em câmara seca, com umidade e temperatura controladas. O...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Glycine max; Storage; Viability; Vigor Glycine max; Storage; Viability; Vigor.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5972

An on-line advisor for sizing and economic analysis of  anaerobic digestion plants
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Busato, Patrizia; Berruto, Remigio; Sopegno, Alessandro; Cornelissen, Renè.
A web-based service was deployed to appropriately size bio-gas plant capacity and perform its economic viability and return on investment based on biomass availability.  The tool is based on accepted biogas plant engineering design practice, incorporating the effects of incentives resulting from energy policies for member nations of the European Union participating in the Bioenergy Farm IEE and EU funded project.  The service provides a comprehensive database that allows consultants and farmers to analyze anaerobic digestion systems at different levels of granularity.  It also included multilingual support.  An adoption program was conducted to increase awareness on the availability of the service and ensure appropriate use and interpretation of its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering; Information Technology Biogas; Bioenergy; Feasibility; Viability; Subsidy; Web application; Free.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2714

Embryogenic induction of torch ginger (Etlingera elatior) callus
Provedor de dados: Agrociencia
Autores: Días,Gabrielen de M. Gomes; Rodrigues,Filipe Almendagna; Soares,J. Dória Rodrigues; Pasqual,Moacir; Carvalho,A. Cristina Portugal- Pinto de.
Torch ginger Etlingera elatior (Jack) R.M. Smith is a tropical herb-like, rhizome-like and perennial plant that possesses inflorescences that are both pretty and showy at different colour shades, and have a great visual appeal. Producing seedlings at a high enough level when done conventionally by the division of tussocks, has high costs and phytosanitary problems. The objective of this study was to evaluate the induction of somatic embryogenesis and its potential for subsequent plant regeneration in torch ginger. Rhizomes, leaves and roots from the seedlings grown in vitro were used as explant segments. The different explants were cultured on MS medium supplemented with 30 g L-1 sucrose, and it was solidified with 5.5 g L-1 of agar. The effect of 2.4-D...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zingiberaceae; Etlingera elatior; Viability.
Ano: 2014
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000200004

Campomanesia adamantium (Cambess.) O. Berg seed desiccation: influence on vigor and nucleic acids
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: DRESCH,DAIANE M.; MASETTO,TATHIANA E.; SCALON,SILVANA P.Q.
The aim of this study was to evaluate the sensitivity of Campomanesia adamantium seeds to desiccation by drying in activated silica gel (fast) and under laboratory conditions (slow). To assess the sensitivity of the seeds to desiccation, we used drying with silica gel and drying under laboratory conditions (25 °C), in order to obtain seeds with moisture content of 45, 35, 30, 25, 20, 15, 10 and 5%. The physiological potential of the seeds after desiccation was evaluated by measuring primary root protrusion, percentage of normal seedlings, germination seed index, seedling length, total seedling dry mass, electrical conductivity and DNA and RNA integrities. The C. adamantium seeds were sensitive to desiccation and to a reduction in moisture content to 21.1%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; DNA; Drying; RNA; Viability.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502217

Cross-disciplinary approaches for measuring parasitic helminth viability and phenotype
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Peak,Emily; Hoffmann,Karl F.
Parasitic worms (helminths) within the Phyla Nematoda and Platyhelminthes are responsible for some of the most debilitating and chronic infectious diseases of human and animal populations across the globe. As no subunit vaccine for any parasitic helminth is close to being developed, the frontline strategy for intervention is administration of therapeutic, anthelmintic drugs. Worryingly, and unsurprising due to co-evolutionary mechanisms, many of these worms are developing resistance to the limited compound classes currently being used. This unfortunate reality has led to a renaissance in next generation anthelmintic discovery within both academic and industrial sectors. However, a major bottleneck in this process is the lack of quantitative methods for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helminth; Schistosome; Nematode; Viability; Phenotype.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200024

Relationship between number of ovipositions of Cotesia flavipes (Cam.) and number of descendants emerged from its host Diatraea saccharalis (Fabr.)
Provedor de dados: Anais da Sociedade Entomológica do Brasil
Autores: Yamauchi,Meire N.; Gobbi,Nivar; Chaud-Netto,José; Campos-Farinha,Ana E.
Females of Cotesia flavipes (Cam.) were individually introduced into Petri dishes containing one larva of its host Diatraea saccharalis (Fabr.). Each C. flavipes female was allowed to oviposit once or twice in the same larva. Time of emergence of larvae and adults, sex-ratio, number of non-viable larvae and pupae, and longevity of adults of C. flavipes were recorded. Data revealed that two successive ovipositions in the host did not affect sex-ratio, but increased number of parasitoids and number of non-viable larvae and pupae.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Parasitoid; Superparasitism; Sex-ratio; Viability.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000100012

Effect of vitrification on viability and chromosome abnormalities in 8-cell mouse embryos at various storage durations
Provedor de dados: Biological Research
Autores: MOZDARANI,HOSSEIN; MORADI,SHABNAM Z.
This study was desµgned to investµgate the effect of vitrification and post-thaw survival and chromosomal aberrations caused by vitrification of vitrified 8-cell mouse embryos in comparison with a controligroup. To this purpose the survival rate and the frequency of chromosomal aberrations were assessed in frozen-thawed 8-cell mouse embryos after various storage durations in the presence of ethyleneiglycol as cryoprotectant. eight-cell mouse embryos were obtained from NMRI mice 3 days after mating. Retrieved embryos were transferred to vitrification solution containing ethyleneiglycol as cryoprotectant, then transferred into a vitrification straw using standard technique, and vitrified in liquid nitrogen. Sixigroups of embryos according to storage duration...
Tipo: Journal article
Palavras-chave: Cryopreservation; Vitrification; Mouse embryo; Viability; Chromosome abnormalities.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000400004

Intraspecific and interspecific pre-adult competition on the neotropical region colonizer Zaprionus indianus (Diptera: Drosophilidae) under laboratory conditions
Provedor de dados: Bragantia
Autores: Galego,Luís Gustavo da Conceição; Carareto,Claudia Marcia Aparecida.
This study analyzes the pre-adult interactions of Zaprionus indianus, a recently-introduced species in Brazil, with two others Drosophilidae under laboratory conditions. The effects of larval residues on the viability and on the developmental time of Z. indianus, Drosophila simulans and D. sturtevanti were used to evaluate pre-adult competitive interactions, conditioning the culture medium with larval residues. Pre-adult interactions between Z. indianus, D. sturtevanti and D. simulans may affect their relative abundance over time, since the viability of Z. indianus was negatively affected by residues of D. sturtevanti, and its residues reduced the viability of D. simulans and the developmental time of both D. simulans and D. sturtevanti.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zaprionus indianus; Fitness components; Competitive interactions; Viability; Developmental time.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052005000200012

Soy Protein Isolate-Alginate Microspheres for Encapsulation ofEnterococcus faecalis HZNU P2
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Zhang,Yu; Zheng,Wei; Gu,Jian-Fei; Ni,Jian; Wang,Ling; Tang,Zhen-Xing; Shi,Lu-E.
ABSTRACTIn this work, the mixture of alginate and soy protein isolate used as a wall material was developed to encapsulateEnterococcus faecalis HZNU P2 (E. faecalis HZNU P2). The survival ability in the simulated gastric fluid (SGF) and bile salt solution, storage stability at different temperatures and release properties in the simulated intestinal fluid (SIF) of encapsulated cells were assessed. The results showed that encapsulation could offer sufficient protection toE. faecalis HZNU P2. The viability of encapsulatedE. faecalis HZNU P2 did not decrease in SGF at pH 2.5 or 2.0 after 2 h incubation, while free cells were reduced from 11 to 9.85 log CFU/mL in SGF (pH 2.5) at the same exposure time. Only minor viability of encapsulatedE. faecalis HZNU P2...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enterococcus faecalis; Encapsulation; Soy protein isolate; Alginate; Stability; Viability.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000500805

Physiological changes of Candida tropicalis population degrading phenol in fed batch reactor
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Komarkova,Eliska; Paca,Jan; Klapkova,Eva; Stiborova,Marie; Soccol,Carlos R; Sobotka,Miroslav.
Candida tropicalis can use phenol as the sole carbon and energy source. Experiments regarding phenol degradations from the water phase were carried out. The fermentor was operated as a fed-batch system with oxistat control. Under conditions of nutrient limitation and an excess of oxygen the respiration activity of cells was suppressed and some color metabolites (black-brown) started to be formed. An accumulation of these products inhibited the cell growth under aerobic conditions. Another impact was a decrease of the phenol hydroxylase activity as the key enzyme of the phenol degradation pathway at the end of the cell respiration activity. This decrease is linked with the above mentioned product inhibition. The cell death studied by fluorescent probe...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenol; Biodegradation; Candida tropicalis; Phenol hydroxylase; Starvation stress; Viability.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400007

Viability of bull spermatozoa collected from the epididymis stored at 18-20°C
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Bertol,Melina Andrea Formighieri; Weiss,Romildo Romualdo; Thomaz-Soccol,Vanete; Kozicki,Luiz Ernandes; Fujita,Aline Silva; Abreu,Renata Azevedo de; Green,Kerriel Thandile.
The aim of this study was to evaluate the viability of bull spermatozoa collected from the cauda epididymis stored at 18-20°C, which were compared with semen collected by electro-ejaculation method and preserved at 5°C. Ten pairs of testes from Tabapuã bulls were removed by orchiectomy and stored for 6 (G6), 12 (G12), 18 (G18), 24 (G24) and 30 (G30) h at room temperature (18-20°C). Seven days before orchiectomy, semen was collected by electro-ejaculation method. The sperm parameters evaluated were: sperm motility, vigor, concentration, morphology and acrosome defects. Sperm motility declined (p&lt;0.05) when spermatozoa were stored for 30 h in the epididymis. The spermatozoa from the epididymis showed lower sperm motility than that of spermatozoa collected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bull; Epididymis; Orchiectomy; Sperm; Room temperature; Viability.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500008

Effects of Storage and Exogenous Ga3 on Lychee Seed Germination
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Ono,Elizabeth Orika; Leonel,Sarita; Duarte Filho,Jayme; Rodrigues,João Domingos.
The effects of storage time and exogenous gibberellic acid on lychee seeds germination were studied. The seeds were removed from ripe fruits, washed, dried, stored at 8°C for 0, 15 and 30 days, and soaked during 24 hours in water and GA3 at 50, 100 and 200 mg.L-1 solutions. As the storage period increased, the germination capacity was lost, and the seeds had a short germinability after 30-day storage period. Gibberellic acid had not significant effect on enhancing both the germination percentage and rate.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gibberellic acid; Gibberellins; Deterioration; Viability; Recalcitrant seed.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400015

Cytotoxicity Assessment of a Poly(methyl methacrylate) Synthesized for the Direct Fabrication of Bone Tissues
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Linan,Lamia Zuniga; Lima,Nadson Murilo Nascimento; Benatti,Carol; Xavier,Mariana; Rodrigues,Ana A.; Manenti,Flavio; Jardini,Andre; Maciel Filho,Rubens; Gilioli,Rovilson.
ABSTRACT A cytotoxicity study is performed on a poly(methyl methacrylate) polymer (PMMA) to be used for the fabrication of bone tissue by Rapid Prototyping (RP). The solution polymerization is conducted in a pilot plant reactor using more appropriated reagents in consideration of the medical application. Moreover, the polymer is efficiently handled to avoid the side effect of the monomer, reducing the concentration of this specie to 287,731 µg MMA/kg PMMA. The cytotoxicity of the polymer is determined through growth monitoring, adherence and morphology of L-929 cells. Additionally, MTT and LIVE/DEAD tests are performed. The results showed continuous and progressive growth of the cells on the surface of the specimens. Moreover, the material did not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PMMA; Synthesis; Cytotoxicity; Viability; Mesenchymal cells.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100601

Development of single tubing-type canister for cryo-storage of bull semen and their effect on sperm motility and viability
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Ismail,Mohd Iswadi; Osman,Khairul; Ibrahim,Siti Fatimah; Jaafar,Farah Hanan Fatihah; Ghani,Nur Azianie Abd; Zainalabidin,Fazly Ann; Othman,Abas Mazni.
The objective of this study was to evaluate the potential of using single tubing-type canister on sperm quality. Semen was collected from the Bali cattle bull by electroejaculation technique and was cryopreserved in liquid nitrogen using slow freezing cryopreservation method. Two type of canister volume was used in this study; commercial canister (342.25π x 278 mm²) and single tubing-type canister (4π x 90 mm²). Makler counting chamber and computer assisted sperm analyzer (CASA) were used to evaluate the sperm motility and viability of post-thaw sperm. Results showed that the bull sperm motility and viability at the bottom of tubing-type canister was statistically higher and significant as compared to the commercial canister (p&lt;0.05). Significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryopreservation; Sperm; Canister; Motility; Viability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200006

Effect of N-acetyl-L-cysteine on lymphocyte apoptosis, lymphocyte viability, TNF-alpha and IL-8 in HIV-infected patients undergoing anti-retroviral treatment
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Treitinger,Aricio; Spada,Celso; Masokawa,Ivete Yoshico; Verdi,Júlio César Vidal; Silveira,Mariette Van Der  Sander; Luis,Magali Chaves; Reis,Marcellus; Ferreira,Silvia Inês Alejandra Cordova de Pires; Abdalla,Dulcinéia Saes Parra.
N-acetyl-L-cysteine (NAC) has been proposed as an additional therapeutic agent for AIDS patients because it reduces human immunodeficiency virus type 1 (HIV-1) replication in stimulated CD4+ lymphocytes, and it ameliorates immunological reactivity. In a randomized, 180-day, double-blind, placebo-controlled trial performed with HIV-infected patients classified as A2 and A3 according to the criteria of the Center for Disease Control and Prevention, we investigated the effects of oral administration of NAC on HIV-infected patients undergoing their first anti-retroviral therapy; viral load, CD4+ lymphocyte, lymphocyte viability and apoptosis, and TNF-alpha and IL-8 levels were determined. Sixteen patients who received anti-retroviral therapy plus a placebo...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: N-acetylcysteine; Apoptosis; Viability; HIV; Glutathione; TNF-alpha; IL-8.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702004000500005

Yeast CUP1 protects HeLa cells against copper-induced stress
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Xie,X.X.; Ma,Y.F.; Wang,Q.S.; Chen,Z.L.; Liao,R.R.; Pan,Y.C.
As an essential trace element, copper can be toxic in mammalian cells when present in excess. Metallothioneins (MTs) are small, cysteine-rich proteins that avidly bind copper and thus play an important role in detoxification. Yeast CUP1 is a member of the MT gene family. The aim of this study was to determine whether yeast CUP1 could bind copper effectively and protect cells against copper stress. In this study, CUP1 expression was determined by quantitative real-time PCR, and copper content was detected by inductively coupled plasma mass spectrometry. Production of intracellular reactive oxygen species (ROS) was evaluated using the 2',7'-dichlorofluorescein-diacetate (DCFH-DA) assay. Cellular viability was detected using the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yeast; Overexpression; Copper stress; Viability; ROS.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000700616

Selective enumeration and viability of Bifidobacterium animalis subsp. lactis in a new fermented milk product
Provedor de dados: Brazilian Journal of Microbiology
Autores: Antunes,Adriane Elisabete Costa; Grael,Elza Terezinha; Moreno,Izildinha; Rodrigues,Luana Gajardoni; Dourado,Fernanda Martelo; Saccaro,Daniela Marques; Lerayer,Alda Luiza Santos.
One of the key focuses of today's dairy industry worldwide is the continued development of new products, especially probiotic-based products. Buttermilk is originally a by-product of butter making fermented by Mesophilic Aromatic Cultures (MAC). It can also be made by fermentation of pasteurized whole milk or skimmed milk. This product is not marketed in Brazil. The objectives of this work were: (1) to develop a selective medium for Bifidobacterium animalis subsp. lactis enumeration and (2) to determine the viability of this microorganism during the shelf life of the buttermilk. Skim milk added with 10% sucrose or 0.03% sucralose was pasteurized and inoculated with a composite starter culture consisting of 1% MAC (containing Lactococcus lactis subsp....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mesophilic cultures; Buttermilk; Selectivity; Viability.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100035

Beijerinckia derxii stimulates the viability of non-N2-fixing bacteria in nitrogen-free media
Provedor de dados: Brazilian Journal of Microbiology
Autores: Barbosa,Heloiza R.; Thuler,Daniela Strauss; Shirakawa,Márcia Aiko; Miyasaka,Natália R. S.
The interactions between the nitrogen-fixing microorganism Beijerinckia derxii with two non-diazotrophic bacteria, either Escherichia coli or a facultative sulphur-oxidizing chemolitotroph, were studied in mixed cultures. Direct and indirect contact between B. derxii and E. coli were tested. B. derxii increased CFU numbers and/or maintained the viability of the non-diazotrophic bacteria, but neither growth nor nitrogenase activity of the nitrogen-fixing bacterium were affected by either partner.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beijerinckia derxii; Coculture; Viability.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300004

Electrical stimulation of saccharomyces cerevisiae cultures
Provedor de dados: Brazilian Journal of Microbiology
Autores: Araújo,Ofelia Q.F.; Coelho,Maria Alice Z.; Margarit,Isabel C.P.; Vaz-Junior,Carlos A.; Rocha-Leão,Maria Helena M.
Modulation of cell endogenous membrane potential by an external electrical field influences the structure and function of membrane compartments, proteins and lipid bi-layer. In this work, the effects of applied potential on Saccharomyces cerevisiae growth were characterized through simple yet conclusive experiments. Cell growth time profile and cell division were investigated as macroscopic response to the electrical stimulation. Control experiments were conducted under identical conditions except for the absence of applied potential. Through comparative analysis, electrical stimulation was verified to alter cell cycle as smaller sized population was observed, suggesting that a synchrony in cell division was promoted. Power spectral analysis was employed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electrochemical stress; Saccharomyces cerevisiae; Cell cycle; Viability.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000100016

Transmission of Campylobacter coli in chicken embryos
Provedor de dados: Brazilian Journal of Microbiology
Autores: Rossi,Daise Aparecida; Fonseca,Belchiolina Beatriz; Melo,Roberta Torres de; Felipe,Gutembergue da Silva; Silva,Paulo Lourenço da; Mendonça,Eliane Pereira; Filgueiras,Ana Luzia Lauria; Beletti,Marcelo Emilio.
Campylobacter coli is an important species involved in human cases of enteritis, and chickens are carriers of the pathogen mainly in developing country. The current study aimed to evaluate the transmission of C. coli and its pathogenic effects in chicken embryos. Breeder hens were inoculated intra-esophageally with C. coli isolated from chickens, and their eggs and embryos were analyzed for the presence of bacteria using real-time PCR and plate culture. The viability of embryos was verified. In parallel, SPF eggs were inoculated with C. coli in the air sac; after incubation, the embryos were submitted to the same analysis as the embryos from breeder hens. In embryos and fertile eggs from breeder hens, the bacterium was only identified by molecular methods;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Campylobacter coli; Viability; Transmission; Breeder hens.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200014

The Effects of Different Fungicides on the Viability of Entomopathogenic Nematodes Steinernema feltiae (Filipjev), S. carpocapsae Weiser, and Heterorhabditis downesi Stock, Griffin &amp;amp; Burnell (Nematoda: Rhabditida) under Laboratory Conditions
Provedor de dados: Chilean Journal of Agricultural Research
Autores: Laznik,&amp;#381;iga; Vidrih,Matej; Trdan,Stanislav.
To increase our knowledge on the susceptibility of entomopathogenic nematodes (EPN) species to agrochemicals, the compatibility of the infective juveniles (IJ) of the entomopathogenic nematodes Steinernema feltiae, S. carpocapsae, and Heterorhabditis downesi with 15 chemical fungicides was investigated under laboratory conditions. The effect of direct IJ exposure to fungicides for 24 h was tested in a petri dish at 15, 20, and 25 °C. The results showed that the compatibility of S. feltiae with azoxystrobin was high, and similar findings were obtained for S. carpocapsae (strain C67) and all of the tested fungicides, except for tebuconazole + spiroxamine + triadimenol, maneb, dinocap, and copper (II) hydroxide + metalaxil-M. Nematode H. downesi (strain 3173)...
Tipo: Journal article
Palavras-chave: Compatibility; Fungicides; Viability.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100010

Vigor tests to evaluate the physiological quality of corn seeds cv. 'Sertanejo'
Provedor de dados: Ciência Rural
Autores: Sena,Daniela Vieira dos Anjos; Alves,Edna Ursulino; Medeiros,Dayana Silva de.
ABSTRACT: The vigor tests are intended to monitor the quality of seeds as it allows reliably distinguish lots of low and high vigor, providing additional information to the germination test. So in this study the objective was to identify the most efficient vigor tests on stratification of lots of corn seeds cv. 'Sertanejo'. The experiment was conducted at Laboratory of Seed Analysis at the Center of agricultural Science of the Universidade Federal da Paraíba, using samples from 20 seed lots in a completely randomized design. For characterization of the lots it was evaluated water content, germination and vigor (cold test, electrical conductivity, accelerated aging, seedling emergence in field and germination at low temperatures). The accelerated aging,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Viability; Seed analysis.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300151

pH of exudate test in the physiological quality of crambe seeds
Provedor de dados: Ciência Rural
Autores: Alves,Charline Zaratin; Rodrigues,Lennis Afraire; Rego,Carlos Henrique Queiroz; Silva,Josué Bispo da.
ABSTRACT: Crambe is a rapeseed with high oil content and can be used as a winter cover or as a source of raw material for the production of biodiesel, however espite the growing interest in the culture, research on the subject is still incipient, especially concerning the seed production and analysis technology. The purpose of this study is to evaluate the physiological quality of crambe seeds, 'FMS Brilhante' cultivar, by testing the pH of exudate. Five seed lots were submitted to the determination of water content and the tests of germination and vigor (first count, emergence and tetrazolium). In the conduction of pH exudate test, temperatures (25 and 30oC), and periods of seed imbibition in water (15, 30 and 45 minutes) were tested. The experiment was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crambe abyssinica Hochst; Viability; Vigor.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000601014

Encapsulation of Lactobacillus acidophilus La-5 and Bifidobacterium Bb-12 by spray drying and evaluation of its resistance in simulated gastrointestinal conditions, thermal treatments and storage conditions
Provedor de dados: Ciência Rural
Autores: Nunes,Graciele Lorenzoni; Motta,Mariana Heldt; Cichoski,Alexandre José; Wagner,Roger; Muller,Édson Irineu; Codevilla,Cristiane Franco; Silva,Cristiane de Bona da; Menezes,Cristiano Ragagnin de.
ABSTRACT: Lactobacillus acidophillus La-5 (ML) and Bifidobacterium Bb-12 (MB) microparticles were produced at different temperatures by spray dryer. The influence of different temperatures on the viability, encapsulation efficiency, water activity and moisture were evaluated. Microparticles that presented more viability were submitted to thermal resistance, gastrointestinal simulation, storage stability, morphology and particle size analyses. Drying temperature of 130°C showed higher encapsulation efficiency, 84.61 and 79.73% for Lactobacillus acidophillus (ML) and Bifidobacterium Bb-12 (MB) microparticles, respectively. In the evaluation of thermal resistance and gastrointestinal simulation, the microparticles of Lactobacillus acidophillus La-5 (ML)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spray dryer; Viability; Probiotics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600751

Suitability of the tetrazolium test methodology for recently harvested and stored coffee seeds
Provedor de dados: Ciência e Agrotecnologia
Autores: Clemente,Aline da Consolação Sampaio; Carvalho,Maria Laene Moreira de; Guimarães,Renato Mendes.
Germination of coffee seeds occurs in a slow and non-uniform manner and the tetrazolium test (TZ) may be a quick alternative for assessment of viability, as long as the preparation and imbibition of the seeds is established. This study was performed in two stages: in the first, recently harvested seeds from three coffee cultivars were submitted to four methodologies for removal of the parchment: manual extraction or use of sodium hypochlorite (NaClO at 5%) and two periods of imbibition of the seeds in water (36 and 48 hours) for removal of the embryos. In the second phase, manual removal and the use of NaClO were compared for elimination of the parchment of stored seeds for monthly performance of the tetrazolium test for six months. Sodium hypochlorite is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Viability; Parchment.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000400005

Improved assessment of wheat seeds vigor
Provedor de dados: Ciência e Agrotecnologia
Autores: Carvalho,Tereza Cristina de; Krzyzanowski,Francisco Carlos; Ohlson,Osvaldo de Castro; Panobianco,Maristela.
The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Physiological quality; Viability.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600002