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| Registros recuperados: 60 | |
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| Guimarães,Fernanda Aparecida Rodrigues; Pereira,Marlon Corrêa; Felício,Cristiane da Silva; Torres,Denise Pereira; Oliveira,Sabrina Feliciano; Veloso,Tomás Gomes Reis; Kasuya,Maria Catarina Megumi. |
| In nature, orchid seeds obtain the nutrients necessary for germination by degrading intracellular fungal structures formed after colonization of the embryo by mycorrhizal fungi. Protocols for asymbiotic germination of orchid seeds typically use media with high concentrations of soluble carbohydrate and minerals. However, when reintroduced into the field, seedlings obtained via asymbiotic germination have lower survival rates than do seedlings obtained via symbiotic germination. Tree fern fiber, the ideal substrate for orchid seedling acclimatization, is increasingly scarce. Here, we evaluated seed germination and protocorm development of Cyrtopodium glutiniferum Raddi cultivated in asymbiotic media (Knudson C and Murashige & Skoog) and in oatmeal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epulorhiza sp.; Symbiosis; Orchid; Substrate; Fern fiber. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000300016 |
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| Guedes, Roberta Sales; UNIVERSIDADE FEDERAL DA PARAIBA; Alves, Edna Ursulino; UNIVERSIDADE FEDERAL DA PARAIBA; Gonçalves, Edilma Pereira; UFRPE; França, Pablo Radamés Cabral de; UNIVERSIDADE FEDERAL DA PARAIBA; Moura, Macio Faria de; UNIVERSIDADE FEDERAL DA PARAIBA; Santos, Sueli da Silva; UNIVERSIDADE FEDERAL DA PARAIBA. |
| Dalbergia nigra (Vell.) Fr. All., conhecida popularmente como jacarandá-da-bahia, é uma espécie bastante conhecida pela exploração da sua madeira. Foi realizado um experimento no Laboratório de Análises de Sementes (CCA/UFPB) Areia, Estado da Paraíba, com o objetivo de determinar metodologia adequada para a condução de testes de germinação e vigor com sementes de D. nigra. O experimento foi conduzido em delineamento inteiramente ao acaso, em esquema fatorial 2 x 7, sendo duas temperaturas (25 e 20-30°C) e sete substratos (entre areia, entre vermiculita, bioplant®, plantmax®, entre e sobre papel mata-borrão e papel toalha), com quatro repetições de 25 sementes cada. As características avaliadas foram: germinação (%), primeira contagem de... |
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Palavras-chave: 2.03.03.00-9 sementes florestais; Jacarandá-da-bahia; Vigor; Substrato; Temperatura 2.03.03.03-3 forest seeds; Jacarandá-da-bahia; Vigor; Substrate; Temperature. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5834 |
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| Borsari, Raquel Renan Jorge; Universidade Estadual de Londrina; Buzato, João Batista; UEL; Silva, Rui Sérgio dos Santos Ferreira da; UEL; Celligoi, Maria Antonia Pedrini Colabone; UEL. |
| The effect of the variables pantothenic acid, yeast extract and sodium chloride, as well as the cell permeabilization technique, were investigated on the formation of levan, ethanol, sorbitol and biomass of Zymomonas mobilis, using a 24-1 fraction factorial design. Cell growth was determined by turbidimetry at 605 nm, relating it to a biomass with a dry weight calibration curve. Reducing sugars were quantified according to Somogyi and Nelson. Total sugars were quantified by the phenol-sulfuric acid method, sorbitol by HPLC and ethanol. The levan produced was precipitated by the addition of absolute ethanol and quantified in fructose units. In levan biosynthesis, the variable that had the largest contribution was cell condition. The results suggested that... |
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Palavras-chave: 2.08.02.00-5; 2.12.02.02-8 Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan Bioquímica dos microrganismos; Microbiologia industrial e de fermentação Zymomonas mobilis; Fermentation; Biomass; Substrate; Sorbitol; Levan. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1519 |
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| Santos, Daniele Bezerra dos; UFRN; Pontes, Cibele Soares; UFERSA; Freire, Fúlvio Aurélio Morais; UFERSA; Bessa Júnior, Ambrósio Paula; UFERSA. |
| Este estudo avaliou o desempenho zootécnico do camarão marinho Litopenaeus vannamei em diferentes tipos de substratos não consolidados. Juvenis (0,97 ± 0,27 g) foram aclimatados na densidade de 52 m-2, em 21 caixas de polietileno com biofiltros individuais, em um sistema fechado de filtração contínua, sendo submetidos aos tratamentos: 1) A = 25% silte + 25% argila + 25% areia muito fina + 25% areia fina; 2) B = 50% areia fina + 50% areia muito fina e 3) Controle = sem substrato, em um delineamento experimental completamente casualizado, com três tratamentos e sete repetições cada. Os animais foram alimentados com 12% da biomassa/dia com ração peletizada (35% de proteína bruta), ofertada em bandejas e parcelada em duas ofertas diárias (8 e 16h).... |
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Palavras-chave: 5.06.03.02-7 Carcinicultura; Substrato; Etologia aplicada; Litopenaeus vannamei; Aquicultura Ciências Agrárias shrimp culture; Substrate; Applied ethology; Litopenaeus vannamei; Aquaculture. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6134 |
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| Araya-Vargas,Alexander; Busutil,Linnet; García-Rojas,Andrea; Pereira-Chaves,José Miguel; Piedra-Castro,Liliana. |
| ABSTRACT Marine sponges fulfill many critical functions to coral reefs. In turn, variations in the community structure of the poriferans may indicate changes in the environmental conditions of the ecosystems where they live. However, their study has been scarce in the Caribbean of Costa Rica, mainly in the ecological field. Therefore, the community structure of these organisms was evaluated in four reef patches (Perezoso, Pequeño, Coral Garden, and the 0.36) and it was determined whether it could be explained by sedimentation, substrate, and depth. Relative abundance (RA) and relative coverage (RC) for each species, sponge density, and diversity indices (species richness, Shannon heterogeneity, Pielou's evenness, and Simpson's dominance) were calculated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porifera; Coral reef; Sedimentation; Substrate; Depth. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612020000100039 |
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| Franco,Elias; Miglioranza,Edison; Fonseca,Ésio de Pádua. |
| The objective of this study was to analyze the effect of biosolid composts (BC) and carbonized rice hull (RH) on the production of Coffea arabica L. cv Catuaí Vermelho seedlings (IAC H 2077-2-5-99) grown in tubets. A totally randomized experimental design with five treatments and four replications was conducted in a nursery, to evaluate Co, Ni, Cr, Pb, Cu, Mn and Zn contents in roots, stems and leaves. Higher contents of Cr, Co, Ni, Pb, Cu and Zn were found in roots, while leaves carried the highest content of Mn. Zn in leaves went from average to high in plants developed in BC. In plants developed in RH. Mn content was about four times higher than the adequate concentration. Ni, Co, Cr, Pb and Cu contents found in leaves were considered normal, according... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; Substrate; Sewage sludge; Coffee nutrition; Coffee seedling. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400002 |
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| Dias,Roberto Júnio Pedroso; Bessa,Elisabeth Cristina de Almeida; D'Ávila,Sthefane. |
| The aim of this study was to verify the influence of substrate humidity on desiccation resistance of Subulina octona, continuously exposed, for 48 h, to the temperature of 35 °C. Forty individuals conditioned in 2 plastic boxes, one box containing black earth humidified with 40 ml water and the other one containing dry black earth were used. The retraction of cephalopodal mass inside the shell and the number of dead individuals was evaluated. Snails from dry and humid substrate boxes showed cephalopodal mass retraction of 9.9 cm±2.88 and 2.78 cm±3.17, respectively, after 12 h of exposure; 8.55 cm±1.3 and 6.33 cm±2.91, after 24 h; 11.07 cm±4.19 and 7.27 cm±2.7, after 36 h, 9.12 cm±2.15 and 6.47 cm±2.11, after 48 h. Every individual of dry substrate box died... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land snail; Desiccation; Cephalopodal mass retraction; Substrate; Humidity. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100016 |
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| Montini,Renato Mamede de Castro; Passos,José Raimundo de Souza; Eira,Augusto Ferreira da. |
| The mycelium growth kinetics and vigor of shiitake (Lentinula edodes (Berk.) Pegler) strains LE 96/17, LE 98/51, LE 98/53, and LE 98/56 were studied under different agar medium compositions. The strains were from the mycological collection of the Módulo de Cogumelos, Faculdade de Ciências Agronômicas, Unesp-Botucatu, Brazil. Mycelium fragments from stock cultures were transferred to Petri dishes with Sawdust extract-Dextrose-Agar medium. The area of growth and vigor (density) of the mycelia were daily recorded with a digital camera, during incubation, until the complete colonization of the Petri dish. The images were analyzed by the freeware UTHSCSA ImageTool, v. 2.0, developed by the University of Texas Health Science Center, San Antonio. The kinetics of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lentinula edodes; Shiitake; Substrate; Mycelium growth; Strains. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000100017 |
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| Andrade,Vânia Sousa; Sarubbo,Leonie Asfora; Fukushima,Kasutaka; Miyaji,Makoto; Nishimura,Kazuko; Campos-Takaki,Galba Maria de. |
| Recently, some Mucorales species have been reported as protease producers. The production of extracellular proteases by Mucor circinelloides using glucose as substrate was studied. Experiments were carried out with different D-glucose concentrations (40, 60 and 80 g/L). Biomass, pH and protease activity were determined. Although biomass production had reached best yields for the medium containing D-glucose in a concentration of 80 g/L, the enzymatic production was higher when the substrate concentration was reduced to 40 g/L. The yield factor for product on cell growth and the yield factor for product on carbon substrate were higher when the microorganism grew in medium containing 40 g/L glucose. The kinetics parameters suggest that this strain seems to be... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extracellular proteases; D-glucose; Substrate; Mucor circinelloides. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200002 |
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| Bressan,Wellington. |
| Nutrients media (Murashige & Skoog, Hoagland & Arnon and White's media) supplemented or not with sucrose and substrates (vermiculite, agar and natrosol) were tested for their effects on plant development and root colonization of micropropagated sweet potato, cv. White Star, by Glomus etunicatum Becker & Gerdemann (isolate INVAM FL S329). Addition of sucrose (3%) did not affect plant development. However, hyphal growth and root colonization were depressed. Contrasting responses to media nutrient concentration were observed for plant height, root colonization, and hyphal growth. The highest concentration of nutrients in Murashige & Skoog medium improved plant development, but this medium decreased hypha growth and inhibited... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arbuscular mycorrhiza; Micropropagation; Media composition; Substrate. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100006 |
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| Linde,Giani Andrea; Luciani,Alana; Lopes,Ana Daniela; Valle,Juliana Silveira do; Colauto,Nelson Barros. |
| Abstract Basidiomycetes have several biotechnological and industrial applications such as enzyme production, bioremediation, pharmaceutical and functional food production. Due to climatic features, the preservation of several basidiomycetes is threatened, and to guarantee the preservation of this genetic resource, the development of long-term preservation techniques is necessary once there is no universal protocol for the cryopreservation of basidiomycetes. Cryopreservation is a technique in which microorganisms are submitted to ultralow temperatures. Therefore, this study aimed to collect information on the main conditions for long-term cryopreservation of basidiomycetes in the last 20 years. Scientific articles on cryopreservation of basidiomycetes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preservation; Substrate; Fungi; Mycelial viability; Cryoprotectant. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200220 |
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| Tapia,Maria Luisa; Caro,José Marcelo. |
| The quality of lettuce (Lactuca sativa) seedlings is closely dependent on the substrate and the management practice during the transplant to the hydroponic system. This seed bed process may affect the normal development of the seedlings by affecting the post-transplanting period, potentially causing root stress, influencing establishment and even leading to seedling loss. An important criterion when choosing either a single or mixed substrate is the ability to provide for both growth and establishment of the seedlings in the hydroponic system. The main objective of this study was to evalúate the effect of granulated rockwool substrate (Agrolan, Compañía IndustrialEl Volcán S.A., Santiago, Chile), expanded perlite A6 (Harbolite Chile Ltda., Santiago,... |
| Tipo: Journal article |
Palavras-chave: Hydroponic; Lactuca sativa; NFT-modified hydroponic; Seedling bed; Substrate; Transplant stress. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300007 |
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| Cichoski,Alexandre José; Rotta,Renata Bezerra; Scheuermann,Gerson; Cunha Junior,Anildo; Barin,Juliano Smanioto. |
| Due to the fact that previous studies on the enzymatic activity of Glutathione peroxidase (GSH-Px) diverge widely in their methodology and results, this study aimed to investigate the influence of different analytical conditions on GSH-Px activity in chicken thighs from broilers that were fed different diets with different sources and concentrations of selenium. GSH-Px activity was evaluated six hours after slaughter and 120 days after frozen storage at -18 ºC. The different analytical conditions included time of pre-incubation (0, 10 and 30 minutes), reaction medium, types of substrate (H2O2 (0.72 mM, 7.2 mM, and 72 mM) and Terc-butil hydroperoxide 15 mM), and different buffer concentrations (buffer 1, potassium phosphate 50 mM pH 7.0 + EDTA 1 mM +... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: GSH-Px; Meat chicken; Enzymatic activity; Selenium; Buffers; Substrate. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000400004 |
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| Antunes,Luiz Fernando de Sousa; Scoriza,Rafael Nogueira; Silva,Dione Galvão da; Correia,Maria Elizabeth Fernandes. |
| ABSTRACT: The putrefactive activity of organisms such as diplopods in the edaphic macrof auna can be leveraged to promote the transformation of agricultural and urban waste into a low-cost substrate for the production of vegetable seedlings. This research aimed to evaluate: (1) the quantity of Gervais millipedes ( Trigoniulus corallinus ) needed to produce an acceptable quantity of organic compost; (2) the main physical and chemical characteristics of different compost types; and (3) compost efficiency in the production of lettuce seedlings. The first experiment lasted 90 days and was conducted using 6.5L of Gliricidia, 6.5L of Flemingia, 13.5L of grass cuttings, 4.5L of cardboard, 4.5L of coconut husk, and 4.5L of corncob. Treatments consisting of 0,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diplopoda; Substrate; Vegetables.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500815 |
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| Catalan,Aiane Aparecida da Silva; Krabbe,Everton Luis; Avila,Valdir Silveira de; Lopes,Letícia dos Santos; Nunes,Ana Paula; Morés,Marcos Antonio Zanella; Roll,Victor Fernando Büttow; Xavier,Eduardo Gonçalves. |
| ABSTRACT: In order to evaluate the efficiency of phytase in diets with low and high phytate phosphorus (PP) 0content, as a consequence of wheat bran inclusion, on the relative weight of organs, intestinal morphometry and performance, three hundred and eighty-four male Cobb500 broilers were housed in metabolic cages. Animals were assigned into four treatments in a 2x2 factorial scheme in a randomized block design with eight replicates of 12 birds each. From 11 days of age birds received experimental diets, which consisted of: Diet low in PP; Diet low in PP with phytase (500FTU kg-1); Diet with a high PP and Diet with a high PP with phytase (500FTU kg-1). At 22 and 32 days of age two birds were slaughtered in order to collect gizzard, heart, liver, cecum,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bird; Enzyme; Substrate; Wheat bran.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001858 |
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| Registros recuperados: 60 | |
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