Consulta: subjectFacets:"Microorganisms"
Registros recuperados: 91
Data/hora: 09/06/2024 06:06:18

PHYSICOCHEMICAL CHARACTERIZATION OF FERMENTED BOKASHI COMPOST PRODUCED ON FARM IN SOUTHERN BRAZIL
Provedor de dados: 196
Autores: Lopes Pereira, Gustavo; Leite de Araújo, Larissa; Soares Wenneck, Gustavo; Saath, Reni; Ghuidotti, Gabriela Cristina; Presotto Bertolo, Raissa.
Bokashi is fermented organic compost capable of improving the physical, chemical, and biological conditions of the soils. The compost action in the agricultural production system is influenced by its preparation, resulting in products with different physicochemical characteristics. The study aimed to characterize bokashi produced on-farm and compare it with commercial products. The produced composts in southern Brazil were obtained through efficient microorganisms (EM), collected in an area of permanent preservation, and kefir. Two commercial composts were used for comparison (Plantae FertTM and Bokashi Sementes BrasilTM). Physical characteristics related to apparent specific gravity, water content, and water retention capacity and chemical characteristics...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; On-farm; Organic compost; Residues; Microrganismos; On-farm; Composto orgânico; Resíduos.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6926

Casuarina equisetifolia fitorremeciación de suelo contaminado con diesel y aplicación de bioestimulación y bioaumentación.
Provedor de dados: 32
Autores: Díaz Martínez, María Esther.
En este trabajo se evaluó la germinación de semillas y el crecimiento de plantas de C. equisetifolia L. ante diesel, y su potencial de fitorremediación en combinación de bioaumentación y bioestimulación. La primera fase experimental evaluó el efecto tóxico de 15 dosis de diesel (0, 100, 250, 500, 800, 1000, 1500, 2000, 2500, 3000, 5000, 7500, 10000, 15000 y 20000 mg kg-1) en la germinación de semillas y la emergencia de plántulas. A los 10 días, la germinación fue mayor en concentraciones altas de diesel; la mayor geminación ocurrió en 20000 mg kg-1, y la menor se registró ante 5000 mg kg-1. La emergencia de plántulas fue mayor en las concentraciones menores a 5000 mg kg-1. A los 15 días, el crecimiento de las plántulas disminuyó ante concentraciones...
Palavras-chave: Germinación; Emergencia de plantas; Simbiosis; Fertilización; Microorganismos; Degradación de hidrocarburos; Seed germination; Seedling emergence; Symbiosis; Fertilization; Microorganisms; Hydrocarbon degradation; Maestría; Edafología.
Ano: 2012
URL: http://hdl.handle.net/10521/730

Quantificação de microrganismos em solos sob plantio puro de Pseudosamanea guachapele (Kunth) Harms e em consórcio com Eucaliptus grandis Hill ex Maideu.
Provedor de dados: 14
Autores: FREIXO, A. A.; FADIGAS, F. de S.; FREIRE, M. de O.; BALDANI, V. L. D.
bitstream/CNPAB-2010/27168/1/cot039.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pseudisamanea guachapele; Litter.; Bactéria; Eucalyptus Grandis; Eucalipto; Microrganismo; Serapilheira; Solo.; Microorganisms; Soil.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623911

Microrganismos e disponibilidade de fósforo (P) nos solos: uma análise crítica.
Provedor de dados: 14
Autores: MENDES, I. de C.; REIS JUNIOR, F. B. dos.
ABSTRACT: Cerrado soils are extremely old, highly weathered and depleted in essential nutrients, especially P. For this reason, the addition of P fertilizers is mandatory in order to obtain economical yields of annual crops. Soil microorganisms play a key role in the P cycle. The P immobilized in the soil microbial biomass acts as reservoir of this element. Soil microorganisms also produce enzymes that act in the P mineralization, participate in the solubilization of inorganic phosphorus and are able to form symbiosis with plants, denominated mycorrizha, enhancing the uptake of this element. In this review we discuss the results of several studies evaluating the use of soil microorganisms to increase P availability in soils, some of the difficulties...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fósforo; Inoculação; Microbiologia do Solo; Mineralização; Microrganismo; Solubilização.; Inoculation methods; Microbiology; Microorganisms; Mineralization; Phosphorus; Solubilization.; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568171

COLEÇÕES de culturas de microrganismos de interesse da agroindústria e produção animal.
Provedor de dados: 14
bitstream/item/36723/1/FD-0032.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Indústria de alimento; Microrganismo; Indústria agrícola; Produção animal; Microorganisms; Animal production; Agricultural industry.
Ano: 2010
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/894627

Microrganismos deteriorantes do leite armazenado em tanques de resfriamento coletivo em Rondônia.
Provedor de dados: 14
Autores: DIAS, J. A.; OLIVEIRA, A. M. de; MACEDO, S. C. C.; FARIA, G. V.; CONSTANTINO, N. A. S.; SILVA, F. de A. C.
Considerando a predominância do uso de tanques de resfriamento coletivos no armazenamento do leite cru em Rondônia e a grande diversidade de microrganismos deletérios ao leite, o objetivo do trabalho foi avaliar a microbiota deteriorante do leite armazenado em 23 tanques coletivos da microrregião de Ji-Paraná e Cacoal. Para a contagem dos microrganismos utilizou-se semeadura em duplicata de 1 mL em placas de Petrifilm® AC aeróbios mesófilos e Petrifilm® EC coliformes totais de acordo com o fabricante. Para a contagem de psicrotróficos e termodúricos psicotróficos, as amostras foram semeadas em ágar padrão leite a 10%. Para a pesquisa de microrganismos termodúricos mesófilos e psicrotróficos, as amostras foram submetidas ao tratamento térmico (62,8 ± 0,5...
Tipo: Folhetos
Palavras-chave: Microbiota; Cooling tank; Leite; Qualidade; Armazenamento; Tanque; Resfriamento; Milk quality; Cold storage; Microorganisms.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1136312

PORTFÓLIO insumos biológicos: menos insumos sintéticos, mais economia e maior sustentabilidade.
Provedor de dados: 14
Este portfólio engloba os temas controle biológico de pragas, promoção do crescimento de plantas e fitoquímicos/bioativos. Os ativos gerados são a base para o desenvolvimento de bioinsumos e/ou tecnologias para atenderem às demandas do setor produtivo.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Ativos biológicos; Microrganismos; Biofertilizante; Microorganisms; Biological resources.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1135842

Extração conjunta de DNA e RNA bacteriano de alta pureza.
Provedor de dados: 14
Autores: OLIVEIRA, A. L. M. de; SIMÕES-ARAÚJO, J. L.; BALDANI, J. I.
bitstream/CNPAB-2010/32378/1/cot075.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Ácido ribonucléico; Deoxyribonucleic acid; Ribonucleic acid.; Ácido Nucléico; Bactéria; Microrganismo.; Microorganisms; Nucleic acids.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/628137

Microflore et anchoitage.
Provedor de dados: 5
Autores: Campello, Francois.
The author studies the microbial phenomena which occur during the maturation of French anchovies, some from the Basque, the others from the Roussillon coast. There are some differences in relation with the origin of the fishes. On a marine agar, the microflora of the Mediterranean ones is almost constant or in a light diminution while that of the Atlantic ones is climbing during 9 weeks before a decline. On an extremely salted agar and in the both origins the archaebacteria are increasing in number during 5 to 6 weeks and diminishing before. The complete ripening is obtained within 16-17 weeks. The limits of the significance of the microbiological analysis are discussed.
Tipo: Text
Palavras-chave: MED; France; ANE; Clupeidae; Pisces; Engraulis encrasicolus; Microorganisms; Curing; Processing fishery products.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1826.pdf

Microflores sulfatoreductrices en milieu subantarctique. Relations avec quelques parametres physicochimiques et biologiques. (Microflores totales et heterotrophes)
Provedor de dados: 5
Autores: Delille, D; Bouvy, M.
The archipelago of Kerguelen with its complex fjord distribution is particularly interesting for the study of anoxic systems. Between 1968 and 1972, several stations were investigated fortnightly. One of these was further sampled weekly throughout 1982. Each sample series of sediment included the superficial aerobic and subsuperficial anaerobic levels. Each level was examined for direct epifluorescent counts, heterotrophic and sulfate-reducing bacterial numbers by M.P.N. methods, organic carbon and sulfide measurements. Sulfate-reducing bacteria seemed less related to total biomass than the heterotrophic microflora, the latter being dependent on organic supplies. The hydrogen sulfide production was directly related to the presence of sulfate reducers;...
Tipo: Text
Palavras-chave: Anoxic conditions; Bacteria; Heterotrophic organisms; Sulphur; Organic carbon; Physicochemical properties; Seasonal variations; Population number; Microorganisms; Polar waters; Sulfate reduction.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-970.pdf

Heavy metals effect on bacterial communities from coastal sediments.
Provedor de dados: 5
Autores: Modamio, X; Mallo, S.
The effects of heavy metals on bacterial communities of sea sediments are studied. Samples were taken from a very polluted zone near Barcelona. Bacterial populations were estimated by the plate count method, using culture medium amended with heavy metals (Hg, Cd, Cr and Cu). The authors have also made a numerical taxonomy study with a hundred resistant strains, using 129 unit characters.
Tipo: Text
Palavras-chave: Microorganisms; Marine environment; Toxicity; Bacteria; Numerical taxonomy; Sediment pollution; Pollution effects; Heavy metals.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1013.pdf

Production and consumption of B group vitamins in situ.
Provedor de dados: 5
Autores: Kurata, A.
The changes in concentration of thiamine, biotin and vitamin B sub(12) in water of the soaked bottles for 6 h in situ in the north basin of Lake Biwa were examined successively over 30 hours. The concentrations of the vitamins changed comparatively during 6 h. soaking in situ. Generally, the concentrations of thiamine, biotin and vitamin B sub(12) were in high levels in the morning and in low levels in evening both in the soaked bottles and in the surrounding water. The fluctuation ranges in concentration of vitamins in a 5 m deep layer were greater than those in thermocline. From the data obtained with the soaked bottles in situ, it was supposed that the decrease of vitamins in concentration during the daytime surpass consumption of vitamins by...
Tipo: Text
Palavras-chave: Phytoplankton; Microorganisms; Bacteria; Metabolism; Biological production; Vitamin B; Fresh water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-958.pdf

Etude de la diversité métabolique des micro-organismes des sources hydrothermales
Provedor de dados: 5
Autores: Byrne, Nathalie.
Since the discovery of oceanic hydrothermal vents, microbial diversity of this extreme environment was studied using both cultivation and molecular approaches. In this study the microbial diversity of active chimney from both TAG and Lucky Strike sites (Mid Atlantic Ridge) was investigated using both molecular survey and continuous enrichment culture in a bioreactor. To reproduce as close as possible environmental conditions the cultures were performed in oligotrophic conditions, in the presence of hydrogen and carbondioxide in the gas sweeping mix or using in situ sampled fluid/sea water mix as culture medium. The effect of environmental changes such as temperature and the absence or presence of sulphur was also investigated. Archaeal and Bacterial...
Tipo: Text
Palavras-chave: Culture; Molecular diversity; Metabolism; Hydrothermal vents; Microorganisms; Microbiology; Culture; Diversité moléculaire; Métabolisme; Sources hydrothermales; Micro organismes; Microbiologie.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-7295.pdf

Ecologie des vibrions pathogenes
Provedor de dados: 5
Autores: Dodin, A; Dosso, M; Guillou, M.
There exists no biochemical test allowing to define the pathogenicity of a bacterium, still less for a Vibrionaceae. Two essential characters are to be retained to hold responsible an isolated germ, for an illness: 1) the binding factor, the identification is difficult but a double diffusion of agar should simplify the method; 2) the search for the choleric toxin or a common part of the choleric toxin (toxin LT or ST of E. coli ). Here again, simplified techniques may be used. The acquirement of a plasmid responsible for the binding factor or for the toxin production of the non-pathogenic Vibrionaceae in the origin of certain epidemic diseases in France and in the world. Frequently, epidemics due to common germs (Aeromonas hydrophila of Africa) lead to...
Tipo: Text
Palavras-chave: Aeromonas hydrophila; Vibrionaceae; Bacteria; Ecology; Microorganisms; Hosts; Bacterial diseases; Pathogenic bacteria.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-999.pdf

Rapid method for determining the sensitivity of sulphate-reducing bacteria to biocides.
Provedor de dados: 5
Autores: Sharma, A; Battersby, N; Stewart, D.
The Minimal Inhibitory Concentration (MIC) of a biocide is usually determined by adding it in various concentrations to a suitable growth medium which is then inoculated with the test bacterium. These cultures are then observed for up to 28 days for growth of the organism as shown by its production of black ferrous sulphide. A method has been developed whereby the MIC of a biocide can be found within 4 days. Instead of noting ferrous sulphide production, this new method measures changes in: 1) optical density and 2) sulphate reduction of a logarithmic culture of the test strain exposed to the biocide.
Tipo: Text
Palavras-chave: Bacteria; Microorganisms; Pesticides; Analytical techniques; Sulfate reduction.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1016.pdf

Etude Histopathologique et Ultrastructurale d'une Maladie Rickettsienne Chez le Crabe Carcinus mediterraneus Czerniavski (Crustace Decapode).
Provedor de dados: 5
This study constitutes the first occurrence of a rickettsia-like organism causing a disease experimentally transmissible in marine crustaceans. The high pathogenous power of this microorganism is an important factor of the regulation of the populations of Carcinus mediterraneus.
Tipo: Text
Palavras-chave: Carcinus mediterraneus; Population control; Ultrastructure; Histology; Microorganisms; Diseases.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1933.pdf

Estimates of carbon flow through bacteriplankton in the S. Benguela upwelling region based on 3H-thymidine incorporation and predator-free incubations.
Provedor de dados: 5
Autores: Lucas, M; Painting, S; Muir, D.
Spatial and temporal estimates of bacterial numbers, biomass, activity and production were measured in the S. Benguela upwelling system during the course of a phytoplankton bloom. Bacterial numbers and biomass were highest in the euphotic zone and correlated closely with particulate carbon in the water column rather than with chlorophyll a concentrations. 3H-Thymidine incorporation gave good estimates of production. Differential utilisation of photosynthetic exudates and detrital POC by bacterioplankton during the course of a bloom might account for the varying significance ascribed to exudates and POC as a source of carbon for bacterial production.
Tipo: Text
Palavras-chave: Ecological associations; Algal blooms; Biomass; Microorganisms; Carbon cycle; Bacteria; Nannoplankton; Upwelling; Biogeochemistry.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-985.pdf

Etude d'un Microorganisme de Type Chlamydien chez la Palourde Ruditapes Decussatus L.
Provedor de dados: 5
The authors study a chlamydial micro-organism parasite of the digestive epithelium of the carpet shell Ruditapes decussatus. The action of this microorganism seems of little import : the intracellular infection is limited to a small number of cells and does not cause any serious lesion in the digestive epithelium.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Digestive system; Lesions; Parasitism; Histology; Microorganisms; Diseases.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1934.pdf

Approche microbiologique de l'anchoitage.
Provedor de dados: 5
Autores: Campello, Francois.
The maturation of salted anchovies leads to a product of particular organoleptic properties. The manufacturers have to resolve many problems. A thorough investigation of the phenomenons which occur is necessary to resolve them. The maturation is conducted at different temperatures. The present paper reports the microbiological variations of the present microfloras, from hyper-halophilic to the non-halophilic, which escort organoleptical and biochemical ones chiefly at 20 degree C. If the maturation's temperature is maintained high (28 degree C) there is a strong proteolysis. At 20 degree C the organoleptical characters appear within 2 months.
Tipo: Text
Palavras-chave: France; MED; Engraulis encrasicolus; Clupeidae; Pisces; Microorganisms; Microbiology; Organoleptic properties; Curing; Processing fishery products.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1825.pdf

Models of relations between bacteria and plankton, and regeneration processes in marine planktonic ecosystem.
Provedor de dados: 5
Autores: Martin, Y; Lelong, P; Cauchi, B.
In order to study bacteria-plankton relationships, experimental and mathematical models were used to stimulate biological processes implicated in plankton ecosystems and to analyze community relationships. The model components are phytoplankton, zooplankton, autotrophic and heterotrophic bacteria, ciliates, nutrients, organic matter and phytoplankton antibiotics. This study shows the importance of some factors affecting bacteria communities dynamics and the bacterial activity in mineralization process. Bacterial populations seem to be controlled essentially by the concentration and chemical composition of organic substrates. Antibiosis and predation show a lesser importance on changes in bacteria communities.
Tipo: Text
Palavras-chave: Biogeochemistry; Bacteria; Microorganisms; Mathematical models; Mineralization; Ecosystems; Plankton; Ecological associations.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-982.pdf

Isolation and physiological characterization of two novel, piezophilic, thermophilic chemolithoautotrophs from a deep-sea hydrothermal vent chimney
Provedor de dados: 5
Autores: Takai, Ken; Miyazaki, Masayuki; Hirayama, Hisako; Nakagawa, Satoshi; Querellou, Joel; Godfroy, Anne.
P&gt;Two novel, thermophilic piezophiles, capable of chemolithoautotrophic growth, are successfully cultivated and isolated from a black smoker chimney at the TAG field (Mid Atlantic Ridge: MAR) by using a piezophilic cultivation technique. Both strains (strains 106 and 108) represent dominant cultivated populations of the microbial communities in the chimney surface habitat. Strain 106 represents typically thin, long spiral cells under the piezophilic growth condition but short bent cells under the non-piezophilic condition. It is a strictly chemolithoautotrophic gammaproteobacterium using reduced sulfur compounds as the electron donors, and nitrate and O-2 as the electron acceptors. Based on the 16S rRNA gene sequence, strain 106 would represent a novel...
Tipo: Text
Palavras-chave: Sp. nov.; Ecological signifiance; Hydrostatic pressure; Subsurface biosphere; Base composition; High temperature; Membrane lipids; Gen. nov.; Microorganisms; Diversity.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6652.pdf

Geoglobus acetivorans sp nov., an iron(III)-reducing archaeon from a deep-sea hydrothermal vent
Provedor de dados: 5
Autores: Slobodkina, G. B.; Kolganova, T. V.; Querellou, Joel; Bonch-osmolovskaya, E. A.; Slobodkin, A. I.
A hyperthermophilic, anaerobic, dissimilatory Fe(III)-reducing, facultatively chemolithoautotrophic archaeon (strain SBH6(T)) was isolated from a hydrothermal sample collected from the deepest of the known World Ocean hydrothermal fields, Ashadze field (12 degrees 58' 21 '' N 44 degrees 51' 47 '' W) on the Mid-Atlantic Ridge, at a depth of 4100 m. The strain was enriched using acetate as the electron donor and Fe(III) oxide as the electron acceptor. Cells of strain SBH6(T) were irregular cocci, 0.3-0.5 mu m in diameter. The temperature range for growth was 50-85 degrees C, with an optimum at 81 degrees C. The pH range for growth was 5.0-7.5, with an optimum at pH 6.8. Growth of SBH6(T) was observed at NaCl concentrations ranging from 1 to 6 % (w/v) with an...
Tipo: Text
Palavras-chave: Dissimilatory reduction; Microorganisms; Gradient.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6977.pdf

Evolution de la communaute bacterienne heterotrophe de l'eau de mer lors d'une experience d'aquaculture de crevettes peneides en systemes clos
Provedor de dados: 5
Autores: Sohier, L; Bianchi, M.
The quantitative and qualitative evolution of the heterotrophic bacterial community of sea water was studied throughout an experimental rearing of Penaeus japonicus in closed systems. Cluster analysis was realised on 417 strains coming from water sampled at different moments of the experiment. This collection includes 40 strains coming from a mussel used for diet and 40 strains coming from the digestive tract of one prawn after six months rearing. Quantitative and qualitative studies have both shown a similar evolution of heterotrophic microflora whatever the initial animal load was. The dendrogram obtained led to a description of characteristics of the various populations constituting the heterotrophic bacterial community of the water environment...
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Bacteria; Recirculating systems; Numerical taxonomy; Temporal variations; Microorganisms; Shrimp culture; Heterotrophic organisms.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-972.pdf

Etude des liens trophiques au sein d'une communaute bacterienne selectionnee a partir d'un sediment marin sur le cyclohexene-4 dicarboximide-1,2 (THPI)
Provedor de dados: 5
Autores: Terrom, G; Gil, G; Lepetit, J.
A bacterial community has been selected from a marine sediment on 4-cyclohexene-1,2 dicarboximide or THPI (fungicide). This community consists of nine strains. The "principal" strain, Photobacterium mandapamensis , degrades THPI by different metabolic pathways many of which require co-oxidative sequences. The other eight "auxiliary" strains occur at different states along the trophic chain formed by the "principal" strain, so increasing velocity and intensity of the THPI biodegradation.
Tipo: Text
Palavras-chave: Bacteria; Marine pollution; Microorganisms; Metabolism; Fungicides; Biodegradation; Sediment pollution; Trophic relationships.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1021.pdf

Fecal contamination in coastal areas: An engineering approach
Provedor de dados: 5
Autores: Pommepuy, Monique; Hervio Heath, Dominique; Caprais, Marie-paule; Gourmelon, Michele; Le Saux, Jean-claude; Le Guyader, Soizick.
Introduction : "The occurrence of pathogenic microorganisms in seawater or in shellfish could exist anytime sewage from human or animal origin would be discharged to the coast" (Metcalf, 1982). According to the diseases occurring in the human population or in animals, pathogens might be present in recreational waters or in shellfish. Thus, the presence of human enteric viruses (norovirus, astrovirus, rotavirus, hepatitisAvirus (HAV)) and pathogenic bacteria (Salmonella, Listeria monocytogenes, Shiga-toxin-producing Escherichia coli (STEC), Vibrio cholerae, Vibrio parahaemolyticus, etc.) has been reported in coastal areas for a long time (Colwell, 1978; Metcalf, 1978; Melnick et al., 1979; Grimes, 1991; Bosch et al., 2001;Kong et al., 2002). These...
Tipo: Text
Palavras-chave: Estimating model; Infection dose; Microorganisms; STEC; Bacteria; Virus; Fecal contamination; Pathogenic agent; Marine sediment; Estuarine water; Coastal area; Marine water.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1207.pdf

Nutrition experimentale: Problemes methodologiques lies a l'utilisation des microorganismes comme source trophique
Provedor de dados: 5
Autores: Guidi, L.
The present study deals with technical problems encountered under lab conditions in studies of trophic relations between deposit-feeding invertebrates and microorganisms. Using 2 pure cultures of Pseudomonas and Navicula , it was shown that these microorganisms will attach to artificial (glass beads) and natural (sand grains) substrates. Best microbial attachment was observed on sand (up to 4.8 x 10 super(8) cells.g super(-1) dry wt.). The radioactive labelling of the microorganisms depends not only on the form under which the isotope ( super(14)C) is supplied to the cultures, but also on the time and the duration of the labelling. 70% of the isotope was incorporated in a stable manner by the diatoms. The bacteria incorporated, at most, 34% of the...
Tipo: Text
Palavras-chave: Navicula; Pseudomonas; Bacillariophyceae; Algae; Bacteria; Biological attachment; Radioactive tracers; Methodology; Microorganisms; Trophic relationships; Microbiological culture; Zoobenthos; Nutrition.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-987.pdf

Ecophysiological studies on luminous bacteria associated with marine gastropods.
Provedor de dados: 5
Autores: Ramesh, A; Venugopalan, V.
Information available on the association of luminous bacteria with marine invertebrates is limited. Hence qualitative and quantitative investigations were undertaken with a view to understand the distribution of luminous microflora in relation to the environmental factors and also in the gut of two marine gastropods, Aplysia benedicti Eliot and Bullia tranquebarica (Roding) from Porto Novo (11 degree 29'N, 79 degree 46'E) waters of the East coast of India. The gut of the gastropods harboured maximum number of luminous bacteria when compared to the water and sediment. Qualitative analysis revealed the presence of two luminous bacterial components, viz. Vibrio harveyi and V. fishceri. V. fischeri was not found in association with A. benedicti . The isolates...
Tipo: Text
Palavras-chave: Gastropoda; Vibrio fischeri; Vibrio harveyi; Bioluminescence; Bacteria; Physicochemical properties; Environmental factors; Microorganisms; Luminous organisms; Interspecific relationships; Ecophysiology.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-993.pdf

Interactions of deep-sea vent invertebrates with their environment: The case of Rimicaris exoculata
Provedor de dados: 5
Autores: Schmidt, Caroline; Le Bris, Nadine; Gaill, F.
The vent shrimp Rimicaris exoculata thrives around many hydrothermal vent sites along the Mid-Atlantic Ridge (MAR), where it aggregates into dense swarms. In contrast to hydrothermal vent fields at the East Pacific Rise (EPR), where the biomass is dominated by tubeworms, clams, and mussels, this shrimp is one of the major animal species at MAR vents. These animals are found in the dynamic mixing interface between cold oxygenated seawater and hot, reduced hydrothermal vent fluid. The adaptation of this shrimp to the hostile deep-sea hydrothermal environment and its survival strategy has been investigated since their discovery at the TAG site in the late 1980s. Rimicaris exoculata is now known to colonize black smoker complexes along the MAR in the...
Tipo: Text
Palavras-chave: Extreme environments; Microorganisms; Chemosynthesis; Biomineralization; Symbiosis; Deep sea; Hydrothermal vents; Mid Atlantic Ridge; Shrimp.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3925.pdf

Etude des effets des hautes pressions hydrostatiques sur Pyrococcus yayanosii, un piézophile extrême par une approche multi -”omics”
Provedor de dados: 5
Autores: Michoud, Grégoire.
Since the discovery of hydrothermal vents in 1977, a small number of studies have allowed the isolation and characterization of microorganisms that can withstand high pressures and temperatures. Among these, Pyrococcus yayanosii, a hyperthermophilic archaea of the order Thermococcales, came from the Ashadze site (Mid-Atlantic Ridge) at 4100 m depth. This species represents the first organism both hyperthermophilic and strict piezophilic described to date. It cannot divide at pressures below 20 MPa and its optimal growth pressure is 52 MPa. In order to study the mechanisms used by this species to grow under high pressures, transcriptomics (DNA chips) and proteomics (LC-MS/MS) experiments have been carried out at different pressures, notably sub- and...
Tipo: Text
Palavras-chave: Micro-organismes; Pression; Piézophile extrême; Hyperthermophile; Microorganisms; Hyperthermophilic.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00609/72138/70890.pdf

Chitin/toxicant interactions and microbial degradation within estuarine ecosystems.
Provedor de dados: 5
Autores: Portier, R; Meyers, S.
The environmental effect and fate of several agricultural and industrial source toxicants were evaluated in controlled laboratory microcosm systems in the presence of the aminopolysaccharide polymer, chitin. Toxicants examined included methyl parathion, phenol, pentachlorophenol, 2,4 dichlorophenol, 1,2 dichloroethane and Kepone. Microcosm operating parameters, including pH/Eh, salinity, temperature, flow rate and sediment/water interface conditions, were based on comparable in situ measurements. Fate analysis predictions were based on mineralization of the parent toxicant compound as measured by chromatographic analysis or super(14)CO sub(2) expiration. Chitin, amended to continuous flow microcosms, promoted either cometabolic or cooxidative...
Tipo: Text
Palavras-chave: Controlled conditions; Chemical pollutants; Industrial wastes; Pesticides; Metabolism; Food webs; Biodegradation; Ecosystems; Microorganisms; Environmental effects; Brackishwater pollution; Estuaries; Toxicants; Chitin.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1011.pdf

Role of bacteria in the gastral cavity of Anthozoa.
Provedor de dados: 5
Autores: Herndl, G; Velimirov, B.
Bacterial density of the coelenteric fluid (CF) of some anthozoan species was determined in situ and under laboratory conditions. In all species examined bacterial density of the CF was higher in the gastral cavity than in ambient ranging from 10 super(5) up to 5 x 10 super(6) cells. ml super(-1). Incubation experiments with the CF indicate that a bacterial population within the coelenteron is efficiently controlled by the CF, favoring bacterial growth if bacterial densities are low in the CF and showing clearance activity at high bacterial densities. Feeding of pre-starved anthozoans caused a rapid response of coelenteric rod-shaped bacteria. Evidence is presented that coelenteric bacteria are digested periodically although they contribute 1% to the...
Tipo: Text
Palavras-chave: Anthozoa; Coelomic fluids; Bacteria; Microorganisms; Interspecific relationships; Metabolism; Nutrition.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-989.pdf

Etude ecologique des vibrions du bassin d'Arcachon
Provedor de dados: 5
Autores: Marchand, Michel.
Water and sediment samples monthly collected from Arcachon Bay (Gironde, France) were examined during three years for the presence of marine vibrios. V. cholerae serotype 01 was never detected. On the other hand, the Eyre River and mouth contain non-agglutinating V. cholerae (127 strains) principally in water. The low temperatures slow their development down without stopping it completely. V. parahaemolyticus (257 strains) present in the same areas is particularly isolated from water when the aquatic medium temperature rises to 15 degree C. V. alginolyticus (638 strains) settles the whole Bay, except the river, in any season. The low temperatures promote growth of V. metschnikovii (203 strains) very tolerant towards salinity. V. anguillarum (46 strains)...
Tipo: Text
Palavras-chave: Vibrio metschnikovii; Vibrio anguillarum; Vibrio alginolyticus; Vibrio cholerae; Vibrio; Marine environment; Microorganisms; Sediments; Salinity effects; Temperature effects; Ecology; Water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-998.pdf

Biomass distribution and physiological capabilities of bacteria in the water column above a sea grass system.
Provedor de dados: 5
Autores: Velimirov, B; Herndl, G; Kavka, G.
The distribution pattern of bacteria in the water column above and within a Posidonia oceanica bed near Ischia (off the Gulf of Naples) was investigated and correlated with DOC and POM data for autumn and winter. Data from samples of 5 stations along a transect from shallow to deep showed rather low bacterial densities (10 super(4).ml super(-1)) for both seasons. The number of attached bacteria was higher in late winter as compared to autumn when the leaves are shed from the stands. Except for occasional peaks DOC ranged between 1.5 and 4.5 mg C/1 while POM concentrations ranged form 4 to 14 mg AFDW.1 super(-1). Hydrolytic capabilities of isolated bacterial colonies showed that more carbohydrate substrates could be fermented in winter as compared to...
Tipo: Text
Palavras-chave: Posidonia oceanica; Microorganisms; Physiology; Seasonal distribution; Algae; Bacteria; Particulate organic matter; Metabolism; Water column; Fermentation; Sea grass.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-954.pdf

Polychaete tube walls as zonated microhabitats for marine bacteria.
Provedor de dados: 5
Autores: Reichardt, W.
The predominantly anoxic, sulfide-rich sandy sediment of a shallow lagoon at Kiel Fjord was densely inhabited by the polychaete worm Nereis diversicolor (280 cm super(3) m super(-2) of biomass volume). Burrow walls which contrasted by their brown coloration of at least 1.5 mm thickness with the bulk of the reduced black sediment, made up for 6% of the total volume of the 10 cm cores investigated. Only the uppermost mm of the internal surface layer contained detectable O sub(2). As a result of the build up of internal redox gradients, CO sub(2) dark fixation was activated in the burrow walls (by a factor of approximately equals 2). Assays of ribulose-biphosphate carboxylase activities and viable counts of potentially chemoautotrophic bacteria in different...
Tipo: Text
Palavras-chave: Nereis diversicolor; Polychaeta; Bacteria; Microorganisms; Carbon cycle; Tube dwellers; Carbon fixation; Burrows; Bioturbation; Sediments.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-990.pdf

Sequential resuspension of biofilm components (viruses, prokaryotes and protists) as measured by erodimetry experiments in the Brouage mudflat (French Atlantic coast)
Provedor de dados: 5
Autores: Dupuy, Christine; Mallet, Clarisse; Guizien, Katell; Montanie, Helene; Breret, Martine; Mornet, Francoise; Fontaine, Camille; Nerot, Caroline; Orvain, Francis.
Resuspension thresholds in terms of friction velocity were experimentally quantified for the prokaryotes, protists and for the first time, viruses of intertidal mudflat biofilms. Differences in resuspension thresholds could be related to the type, behaviour and size of microorganisms and their association with particles. Free microorganisms (viruses, bacteria and some nanoflagellates) were resuspended by weak flow at friction velocities lower than 2 cm s- 1. Chlorophyll a, some nanoflagellates and attached bacteria were resuspended together with the bed’s muddy sediment, which required friction velocities larger than 3 cm s- 1. Diatoms smaller than 60 μm were resuspended at velocities between 3 and 5 cm s- 1, while those larger than 60 μm were resuspended...
Tipo: Text
Palavras-chave: Viruses; Microorganisms; Resuspension; Benthic-pelagic coupling; Spatial distribution; Mudflat.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00168/27922/26196.pdf

Biodegradation du petrole en mer. Influence de l'apport d'azote et de phosphore sous forme minerale
Provedor de dados: 5
Autores: Lepetit, J; Guiot, J; Martin, Y; Tagger, S.
To exploit the presence in the sea of microorganisms capable of degrading petroleum products a mineral fertilizer, containing immediatly assimilable nitrogen and phosphorus compounds, was used to increase the microbial population and therefore, the degradation potential of treated polluted waters. The fertilizer supply caused an increase in heterotrophic and hydrocarbon-splitting bacteria and an increase in the phytoplanktonic biomass. The latter is characterized by an increase in a few selected species; it constitutes an important supply of organic substances, and it is responsible for increasing the dissolved oxygen which is essential for petroleum oxidation. Supplying the fertilizer results in an increase in the treated water degradation potential and a...
Tipo: Text
Palavras-chave: Bacteria; Microorganisms; Heterotrophic organisms; Phosphorus compounds; Nitrogen compounds; Fertilizers; Hydrocarbons; Biodegradation; Sea water.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1020.pdf

Microbiological analysis of water used in hydrotherapy
Provedor de dados: 80
Autores: Perestrelo,M. F.; Norberg,A. N.; Guerra-Sanches,F.; Torres,A. C.; Pile,E.
Water used in hydrotherapy units of Nova Iguaçu and Nilópolis, Rio de Janeiro State, Brazil, was microbiologically analyzed. Thirty samples (5ml each) were weekly collected from September 2001 to June 2002 before the beginning and after the end of activities in the units. For analysis, routine techniques were used, which showed the presence of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella spp, Candida spp, Penicillium spp, Epidermophyton spp, Aspergillus fumigatus, Aspergillus niger, Aspergillus spp, Cephalosporium spp, Cladosporium spp, Trichophyton rubrum, and Trichophyton spp. Results indicated a need for improving hygienic conditions, suggesting that water might be a contamination source in the evaluated units.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrotherapy; Water; Microorganisms; Bacteria; Fungi.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000300006

Estudios de enterobacterias en las inmediaciones de Punta Fort William, Isla Greenwich
Provedor de dados: 20
Autores: Helguero, C.; Valencia T., M.
Se presenta un estudio microbiológico de las aguas de Ensenada Guayaquil y Bahía Chile, con el propósito de determinar presencia de enterobacterias en las mismas; se detectó la existencia de tres grupos: Escherichiae, Yersinieae y Klebsielleae. Se estima que eventualmente dicha presencia es ocasionada por la presencia de la actividad humana en el área y por el aporte de los excrementos de las aves transportadas en aguas provenientes de deshielos en el verano.
Tipo: Journal Contribution
Palavras-chave: Microbiological analysis; Microorganisms; Polar waters; Microbiological analysis; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_25302; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 1993
URL: http://hdl.handle.net/1834/3808

Macrofauna bentónica en la zona intermareal y submareal en Caleta Aeolian, Isla Baltra (Galápagos, Ecuador)
Provedor de dados: 20
Autores: Villamar, F.; Cruz, M.
Esta investigación tiene como propósito identificar y dar a conocer las especies de marco invertebrados bentónicos más comunes del área de la Caleta de Aeolian, Isla Baltra del Archipiélago de Galápagos, y conocer la actividad biológica de estos organismos marinos en la zona intermareal y submareal con la finalidad de determinar la composición, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, como un marco referencial futuro que nos permita conocer los cambios para evaluar el impacto ambiental que puedan tener los hábitat de estos invertebrados marinos.
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Abundance; Marine organisms; Community composition; Distribution; Marine invertebrates; Benthos; Intertidal environment; Distribution; Benthos; Intertidal environment; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_3923; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2007
URL: http://hdl.handle.net/1834/2405

Protocols for the Joint Global Ocean Flux Study (JGOFS) Core Measurements
Provedor de dados: 20
This manual describes the protocol approved by the international Scientific Steering Committee for the Joint Global Ocean Flux Study (JGOFS) for the most of the 20 JGOFS Core Measurements. However, the methods for the analysis of various parameters of the seawater CO2 system are described in a separate handbook. In order to have a complete set of the JGOFS measurements protocols, you should request a copy of the "Handbook of Methods for the Analysis of the Various Parameters of the Carbon Dioxide System in Seawater"version 2, A.G. Dickson and C. Goyet, eds. ORNL/CDIAC-74.
Tipo: Book
Palavras-chave: Oceanography; Ocean circulation; Oceanographic stations; Oceanographic data; Oceanographic surveys; Samples; Sampling; Data processing; Data; Data collections; Quality control; Salinity measurement; Oxygen; Inorganic carbon; Nitrites; Nitrates; Phosphorus compounds; Phosphorus cycle; Silicate minerals; Marine organisms; Microorganisms; Bacteriology; Bacteria; Zooplankton; Sampling; Nitrites; Nitrates; Zooplankton; Data processing; Data; Oxygen; Microorganisms; Bacteriology; Bacteria; Http://aims.fao.org/aos/agrovoc/c_6774; Http://aims.fao.org/aos/agrovoc/c_5190; Http://aims.fao.org/aos/agrovoc/c_5187; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_10289; Http://aims.fao.org/aos/agrovoc/c_49816; Http://aims.fao.org/aos/agrovoc/c_5477; Http://aims.fao.org/aos/agrovoc/c_4807; Http://aims.fao.org/aos/agrovoc/c_768; Http://aims.fao.org/aos/agrovoc/c_765.
Ano: 1994
URL: http://hdl.handle.net/1834/2795

Queso fresco probiótico de leche de búfala
Provedor de dados: 20
Autores: Suárez-Solís, V.; Núñez de Villavicencio, M.; Fernández, A.
En el presente trabajo se estudió la obtención de un queso fresco probiótico elaborado a partir de leche de búfala, de características similares al queso crema tradicional cuyos principales indicadores resultaron: humedad 70 %; grasa 12 %; proteínas 10 %; cenizas 1,77 %; acidez 1,39 %. La viabilidad celular fue de 107  UFC/g y su durabilidad fue de 17 días conservado entre 4 y 6 ºC. La evaluación sensorial poblacional lo calificó como “Me gusta mucho”.
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Shelf life.
Ano: 2008
URL: http://hdl.handle.net/1834/4726

Cianobacterias filamentosas, terrícolas de Punta Fort William, Isla Greenwich, Shetland del sur, Antártida
Provedor de dados: 20
Autores: Treiber de Espinoza, B.
Los especímenes de Oscillatoria sp., Phormidium sp. y Phormidium mucicola Hub. constituyen componentes importantes de la microflora terrícola de la cobertura vegetal sobre un afloramiento rocoso de LAGO PEVIMA, Punta Fort William, Isla Greenwich, Shetland del sur. La mayoría de individuos son observados en asociación con los musgos Polytrichum sp. y Polytrichum juníperus Hed, y además como constituyentes del suelo. El presente estudio comprende descripciones morfológicas de los individuos mencionados. El aislamiento y cultivo de las cianobacterias se efectuó mediante el método de diluciones consecutivas en medio de cultivo según Allen (1952) y con la incubación de los cultivos a temperatura ambiental y bajo intensidad y periodicidad de luz natural, en...
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Organism morphology; Physicochemical properties; Microorganisms; Physicochemical properties; Http://aims.fao.org/aos/agrovoc/c_4807; Http://aims.fao.org/aos/agrovoc/c_13330.
Ano: 1993
URL: http://hdl.handle.net/1834/3810

Variación estacional de las especies del microbentos de la Bahía Manta en la costa ecuatoriana, durante 2011
Provedor de dados: 20
Autores: Gualancañay, E.
Durante la estación lluviosa (marzo 2011), las especies identificadas de la microfauna bentónica en el área de la bahía de Manta son: Bulimina pulchella, Buliminella elegantissima, Cibicides bertheloti, F. boueana, Nonion pizarrense, Quinqueloculina lamarckiana, Rotalia beccarii, Lagena striata y la única especie de la microflora béntica fue Coscinodiscus perforatus y corresponden a la provincia zoogeográfica panameña propuesta por Boltovskoy (1965) y confirmada por Boltosvskoy y Gualancañay (1975) y Gualancañay (1986). Durante la fase seca (septiembre 2011), la microflora béntica estuvo representada por dos especies de diatomeas bénticas: Cocinodiscus perforatus y Polymixus coronalis. En cambio la microfauna bentónica se la halló distribuida en el área de...
Tipo: Journal Contribution
Palavras-chave: Seasonal variations; Microorganisms; Benthos; Diatoms; Biogeography; Rainy season; Dry season.
Ano: 2012
URL: http://hdl.handle.net/1834/4708

Microbentos de las vías de agua alrededor de Guayaquil, durante mayo del 2001
Provedor de dados: 20
Autores: Gualancañay, E.
Se analiza el estudio de la microfauna bentónica y de la micro flora béntica del área de las vías de acceso de la ciudad de Guayaquil que comprende, el Río Guayas, Estero Salado, Canales del Morro y de Jambelí, Estero del Muerto y los puentes internos de la ciudad. La microfauna bentónica debido a la gran sedimentación y por las condiciones anóxicas del área al quedarse sepultados y/o fragmentados estuvieron ausentes en unos casos y en otros con representantes muy aislados. En cambio la microflora béntica tuvo una población más frecuente a pesar de la gran turbidez del área, sin embargo y debido a la gran cantidad de restos vegetales son llevados por las corrientes y de esta manera tiene la capacidad de renovar el oxígeno del agua muy vital para el...
Tipo: Journal Contribution
Palavras-chave: Benthos; Microorganisms; Anoxic sediments; Estuaries; Estuarine organisms; Benthos; Estuaries; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2002
URL: http://hdl.handle.net/1834/2258

Variación y frecuencia de algunas especies de Rotíferos provenientes de la Ciénaga Grande de Santa Marta (Colombia)
Provedor de dados: 20
Autores: Avila Parga, Guerly.
Se describen las variaciones de seis especies de Rotíferos, en un lapso determinado, con respecto a los fuertes cambios de salinidad que presenta la Ciénaga Grande. Cuatro de las especies pertenecen a la familia Brachionidae siendo tres especies del género Brachionus y una del género Platyias; una especie pertenece al género Lecane (familia Lecanidae) y una al género Filinia de la familia Testudinelidae. También se comunica la existencia, para esa región colombiana, de otros géneros de Rotíferos.
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Plankton; Microorganisms; Seasonal variations; Coastal lagoons; Estuaries; Zooplankton; Plankton; Estuaries; Microorganisms; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_4807; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1973
URL: http://hdl.handle.net/1834/3316

Estudio de la contaminación con hidrocarburos de un ecosistema de manglar en cayo Santa María, Jardines del Rey, Cuba
Provedor de dados: 20
Autores: Bermúdez Acosta, Jelvys; González Delgado, Alejandro; Castro Hernández, Yoelvis; Ortiz Guilarte, Eudalys; Núñez Moreira, Roberto; Oramas García, Julio; García García, Yaliany.
El propósito de esta investigación fue estudiar la contaminación de un ecosistema de manglar impactado con hidrocarburos en el sector centro sur de Cayo Santa María, Jardines del Rey, Cuba. Para el estudio de los indicadores microbiológicos y fisicoquímicos fue diseñado un muestreo estratificado, donde se seleccionaron dos estratos y diez estaciones de muestreo, considerando los patrones de flujos de marea en pleamar y bajamar, así como el impacto perceptible de la contaminación. La determinación de las poblaciones de microorganismos heterótrofos totales (BHT) y degradadores de petróleo (BDP) en agua y sedimentos se realizó por el método de conteo de colonias, expresadas como UFC·mL-1 o UFC· g-1 según la matriz de análisis. El contenido de hidrocarburos...
Tipo: Journal Contribution
Palavras-chave: ASW; Cuba; Degradation; Dispersion; Hydrocarbons; Microorganisms; Pollution.
Ano: 2014
URL: http://hdl.handle.net/1834/5912

Antártica: fuente de recursos biológicos para la biotecnología nacional
Provedor de dados: 20
Autores: Blamey, J.
En diciembre del 2007, Innova-Chile de CORFO aprobó el financiamiento del proyecto “Antártica: Fuente de recursos biológicos para la biotecnología nacional”. Este proyecto tiene como fin crear una plataforma que facilite el acceso a los recursos antárticos de microorganismos y plantas, de una forma que permitirá su valorización para la biotecnología chilena y su desarrollo científico en el área. Por sus únicas condiciones de aislamiento y bajas temperaturas, la Antártica alberga un potencial científico y biotecnológico enorme, pero también muy altas barreras de entrada de diferente índole.
Tipo: Journal Contribution
Palavras-chave: Biotechnology; Microorganisms; Flora; Biotechnology; Microorganisms; Flora; Http://aims.fao.org/aos/agrovoc/c_16165; Http://aims.fao.org/aos/agrovoc/c_4807; Http://aims.fao.org/aos/agrovoc/c_2983.
Ano: 2008
URL: http://hdl.handle.net/1834/3237

Composición y variación estacional del fitoplancton, zooplancton y microbentos en el estuario interior del Golfo de Guayaquil, durante el año 2003
Provedor de dados: 20
Autores: Gualancañay, E.; Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende el estudio de la distribution cualitativa y cuantitativa del fitoplancton en el Golfo de Guayaquil, durante dos épocas: Húmeda y seca. El propósito del presente trabajo con respecto al zooplankton está orientado a conocer los cambios en la composición, abundancia y diversidad del zooplancton y en particular el Phyllum Chaetognatha con el objetivo de relacionar la distribución de las especies de Quetognatos con los parámetros físicos. En lo relacionado al estudio del microbentos, se pretende estudiar la composición específica y la abundancia relativa de las especies de la microflora béntica y de la microfauna bentónica y su relación con factores ambientales.
Tipo: Journal Contribution
Palavras-chave: Community composition; Seasonal variations; Phytoplankton; Diatoms; Biomass; Zooplankton; Microorganisms; Benthos; Geographical distribution; Estuaries; Phytoplankton; Biomass; Zooplankton; Benthos; Geographical distribution; Estuaries; Diatoms; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2004
URL: http://hdl.handle.net/1834/2283

Evaluación de la fermentación láctica en un yogur dietético
Provedor de dados: 20
Autores: Perea, J.; Brito, A.I.
Se evaluó la cinética de fermentación ácido láctica desarrollada por los cultivos probióticos Bifigur y Bioyogur, en una leche descremada, con adición indistinta de fibras dietéticas solubles (inulina) e insolubles (salvado de trigo). Las evaluaciones se realizaron tomando muestras de la leche recién inoculada y cada 0,5 h hasta la coagulación para expresar gráficamente los valores medios de acidez y pH contra el tiempo. A las 24 h se determinó la viabilidad de los microorganismos inoculados. Las curvas de fermentación presentaron un comportamiento típico, con mayor cinética en la variante con salvado de trigo inoculada con cultivo de Bioyogur, con respecto a la que utilizó inulina y cultivo de Bifigur. La inulina mostró a su vez propiedades estimuladoras...
Tipo: Journal Contribution
Palavras-chave: Food; Microorganisms; Fermentation.
Ano: 2008
URL: http://hdl.handle.net/1834/4721

Un aporte al conocimiento de cianobacterias en Punta Fort William, Isla Greenwich, Shetland del sur. Nostoc sp. Ficobionte de Stereocaulon alpinum Laur.
Provedor de dados: 20
Autores: Treiber de Espinoza, B.
En estudios realizados en líquenes de la especie Stereocaulon alpinum Laur., muestreados en Punta Fort William, Isla Greenwich, Shetland del Sur, se han encontrado clorofíceas del género Trebouxia y cianobacterias del género Nostoc como ficobiontes. Nostoc sp. se localiza en los cefalodios del líquen. El aislamiento del especímen y su cultivo se realizó bajo condiciones fotoautógrafas y en ausencia de nitrógeno combinado. Las características morfológicas y el ciclo de vida de Nostoc sp. en cultivo están descritas en base a observaciones bajo microscopio de luz.
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Organism morphology; Symbiosis; Symbiosis; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_7563; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 1993
URL: http://hdl.handle.net/1834/3809

Search for beneficial bacterial strains for turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt; L.) larviculture
Provedor de dados: 27
Autores: Huys, L.; Dhert, P.; Robles, R.; Ollevier, F.P.; Sorgeloos, P.; Swings, J.
The aerobic bacterial flora in the gut of turbot larvae and their influence on larval survival was examined. Two turbot experiments were run with six replicates each time. Large variation, from 0% up to 44%, was observed in the survival percentage of turbot larvae. There was no correlation between the number of bacteria present in the gut of turbot larvae and the larval survival rate. During both experiments, all replicates followed nearly the same rate of bacterial development in the gut of turbot larvae going from circa 10&lt;sup&gt;2&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; just before first feeding at day 3 post hatch to 10&lt;sup&gt;5&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; at day 9 post hatch.In total, 127 bacterial isolates from 12...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic bacteria; Aquaculture; Commensals; Digestive system; Fish culture; Fish larvae; Gastrointestinal tract; Microorganisms; Rearing; Scophthalmus maximus; Survival; Bacteria; Scophthalmus maximus; Vibrio mediterranei.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5720

Experiences on importance of diet for shrimp postlarval quality
Provedor de dados: 27
Autores: Lavens, P.; Sorgeloos, P.
This paper gives an overview of own experiences with respect to the impact of dietary conditions on the quality of postlarval penaeid shirmp. Direct nutrient-specific effects are documented for highly unsaturated fatty acid (HUFA), phosphatidyl choline (PC) and ascorbic acid (AA). Specific immunostimulants may also contribute to an improved stress resistance of the shrimp fry. Last, but not least, some emphasis is placed on the role of the microflora during the hatchery rearing, the possible reduction of bacteria in the live food adminstered, and the use of probionts through the diet.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Condition factor; Diets; Disease resistance; Feed composition; Microorganisms; Polyunsaturated fatty acids; Rearing; Shrimp culture; Vitamin C; Artemia; Penaeidae [Penaeid shrimps].
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3876

Decomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil
Provedor de dados: 86
Autores: Oliveira,Christiane Abreu de; Muzzi,Maria Rita Scotti; Purcino,Hortênsia Abrantes; Marriel,Ivanildo Evódio; Sá,Nadja Maria Horta de.
Tropical grasslands under lowland soils are generally underutilized and the litter of forage legumes may be used to recover these degraded pastures. The objective of this work was to study the dynamics of litter decomposition of Arachis pintoi (pinto peanut), Hyparrhenia rufa (thatching grass) and a mixture of both species in a lowland soil. These treatments were analyzed in three areas: grass monoculture, legume monoculture and legume intercropped with the grass during the dry and wet seasons. Litter bags containing the legume, grass or a mixture of both species were incubated to estimate the decomposition rate and microorganism colonization. Decomposition constants (K) and litter half-lives (T1/2) were estimated by an exponential model whereas number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage; Microorganisms; Pinto peanuts; Soil organic matter; Thatching grass.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000900010

Genetic variability of Brazilian phytoplasma and spiroplasma isolated from maize plants
Provedor de dados: 86
Autores: Gomes,Eliane Aparecida; Jardim,Sílvia Neto; Guimarães,Claudia Teixeira; Souza,Isabel Regina Prazeres de; Oliveira,Elizabeth de.
The objective of this work was to characterize the genetic variability of phytoplasma and Spiroplasma kunkelii isolated from maize plants showing symptoms of stunt collected from different Brazilian geographic regions. A DNA fragment of 500 base pairs (bp) was amplified from the spiralin gene in S. kunkelii and one fragment of 1,200 bp was generated from 16S rDNA gene in phytoplasma. The partial sequences of the spiralin gene showed similarity of 98% among the isolates of S. kunkelii analyzed. These sequences were compared with the sequence of the spiralin gene from other Spiroplasma species deposited in the GenBank, resulting in a similarity varying from 76.9% to 88.1%. The 16S rDNA sequence from the phytoplasma were completely similar within the...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Zea mays; Microorganisms; Spiralin; Mollicutes; Genetic polymorphism; Gene sequence.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000100009

Microbial alterations of the soil influenced by induced compaction
Provedor de dados: 90
Autores: Pupin,Breno; Freddi,Onã da Silva; Nahas,Ely.
Compaction is one of the most destructive factors of soil quality, however the effects on the microbial community and enzyme activity have not been investigated in detail so far. The objective of this study was to evaluate the effects of soil compaction caused by the traffic of agricultural machines on the soil microbial community and its enzyme activity. Six compaction levels were induced by tractors with different weights driving over a Eutrustox soil and the final density was measured. Soil samples were collected after corn from the layers 0-0.10 and 0.10-0.20 m. The compaction effect on all studied properties was evident. Total bacteria counts were reduced significantly (by 22-30 %) and by 38-41 % of nitrifying bacteria in the soil with highest bulk...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Enzymes; Corn.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500014

The ant fauna of hospitals: advancements in public health and research priorities in Brazil
Provedor de dados: 92
Autores: Castro,Mariana Monteiro de; Prezoto,Helba Helena Santos; Fernandes,Elisa Furtado; Bueno,Odair Correa; Prezoto,Fábio.
Ants inhabit several types of natural and urban habitats, where they successfully nest. In urban environments, the hospitals should be considered priority for studies, as ants pose risks to human health due to their pathogen carrying potential. We aimed at surveying the literature about studies on ants in hospital settings in Brazil in the past 20 years. We found 40 papers in 22 journals, the first one published in 1993. Among them, 26 papers assessed pathogenic microorganisms on ants. We recorded 59 ant species, being Tapinoma melanocephalumthe most common. The Minas Gerais and São Paulo states had the largest number of published papers. Mato Grosso do Sul and Rio Grande do Sul showed the highest number of species. Exotic ant species were recorded in all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cross infection; Disease transmission; Microorganisms; Pest control.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000100077

Physicochemical and microbiological dynamics of the fermentation of the ccn51 cocoa material in three maturity stages
Provedor de dados: 94
Autores: Hernández,Martha del Pilar López; Núñez,Jenifer Criollo; Gómez,María Soledad Hernández; Tovar,María Denis Lozano.
Abstract  The physicochemical and microbiological dynamics during the fermentation phase of the CCN51 cocoa material was evaluated in three maturity stages (stage 2: 130-152 days after anthesis (DAA), stage 3: 153-174 DAA, and stage 4: 175-196 DAA). Through the microfermentation technique, the physicochemical variables (pH, titratable acidity, total soluble solids, and fermentation index) were monitored every 24 hours. The microbiological dynamics were evaluated by counting the colony forming units (CFU) in a plaque, quantifying three types of microorganisms (Bacillus, acetic acid bacteria and yeasts). In the three maturity stages assessed, a decrease in the pH of the beans was observed as the fermentation progressed; between 72 and 96 hours after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maturity; Microorganisms; Quality; Theobroma cacao.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000300903

Dehydration curve, fungi and mycotoxins in Tifton 85 hay dehydrated in the field and in shed
Provedor de dados: 96
Autores: Taffarel,Loreno Egidio; Mesquita,Eduardo Eustáquio; Castagnara,Deise Dalazen; Costa,Patrícia Barcellos; Neres,Marcela Abbado; Horn,Marcelina Bottoni; Oliveira,Paulo Sérgio Rabello de; Meinerz,Cristiane Claudia.
The objective of this study was to estimate the dehydration curve and occurrence of fungi and mycotoxins in Tifton 85 hay. The experimental design was randomized blocks in split plots with four replications and five levels of nitrogen (0, 25, 50, 75 and 100 kg ha-1) in the form of urea, two regrowth ages (28 and 35 days) and drying hay in the sun and in shed. After harvesting, the grass was sampled four times (0, 8, 23 and 32 hours) to dry in the sun and twelve times (0, 3, 18, 27, 42, 51, 66, 75, 90, 99, 114 and 123 hours) for drying in shed, turned over daily. The fungi were identified after seeding and growth in three steps of haymaking (cutting, baling and after 30 days of storage). To verify the presence of mycotoxins, 20 samples, composed of hay...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contaminants; Dry matter; Forage conservation; Microorganisms; Toxins.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000600003

The importance of mastitis in dairy production in Brazil
Provedor de dados: 195
Autores: Costa, Elizabeth Oliveira da.
Mastitis is an inflammation of the mammary gland that causes severe economic losses due to reduced milk production, expence on pharmaceuticals, veterinary care, discarding of milk after treatment and discarding of affected animals. This inflammatory process may have distinct origins, but all cases of economic importance are caused by microorganisms. According to their origin and means of transmission, the main etiological agents were put together in two groups, contagious microorganisms (Streptococcus agalactiae, Staphylococcus sp, e Corynebacterium bovis) transmitted mainly during rnilking and environmental microorganisms (Streptococcus uberis, Enterobacteriaceae, fungos, algae of the genus Prototheca, etc.).Clinical mastitis is characterized by visible...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mastitis; Bovine; Mammary gland; Microorganisms; Control mastite; Bovinos; Glândula mamária; Microrganismos; Controle.
Ano: 1998
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3381

Soil microbial biomass under mulch types in an integrated apple orchard from Southern Brazil
Provedor de dados: 63
Autores: Almeida,Denice de Oliveira; Klauberg Filho,Osmar; Almeida,Henrique Cesar; Gebler,Luciano; Felipe,Aline Franciane.
The use of mulching is an alternative to control weeds but there are few studies on its effect on soil quality. In this sense, this study aimed to evaluate the effect of types of mulching on the attributes of microbial carbon, nitrogen and phosphorus in a Typic Hapludox with production of integrated apples in southern Brazil. The experiment was conducted in randomized blocks in the Vacaria, state of Rio Grande do Sul, southern Brazil. The soil mulch types studied were: pine needle, sawdust, black plastic and a control. The soil samples were collected in February (summer) and August (winter) of 2006, and the attributes related to total organic and microbial carbon, nitrogen and phosphorus were determined. Organic mulchings (pine needle and sawdust) promoted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial carbon; Soil cover; Microbial compartments; Microorganisms; Organic mulch.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200012

การเสริม Schizochytrium sp. ในอาหารต่อการเจริญเติบโต และอัตราการรอดตายในปลานิลรุ่น
Provedor de dados: 106
Autores: Soudsada Saiyasaeng; Bundit Yuangsoi; Sutee Wongmaneeprateep.
Effects of Schizochytrium sp. on growth performance and survival rate of Nile tilapia, Oreochromis niloticus, juveniles were studied. Fish (initial weight 2.27-2.30 g) were fed with commercial pellet feed (32% crude protein) supplemented with Schizochytrium sp. at 0 (control group), 2.5, 5.0 and 7.5% for 8 weeks. The result showed that average weight gain of the 7.5, 5.0 and 2.5% Schizochytrium sp. supplemented were 37.84+1.227, 32.81+0.648 and 31.17+0.226 g, respectively, which were significantly different (P&lt;0.05) from the control group (28.11+2.393 g). The Schizochytrium sp. supplemented fish had the average daily growth rate was significantly higher (P&lt;0.05) than the control group but there was no statistically significant difference among...
Tipo: PhysicalObject
Palavras-chave: Nile tilapia; Oreochromis niloticus; Schizochytrium; Microorganisms; Dietary supplementation; Omega 3; Growth performance; Survival rate; Hepatosomatic index; HSI; Feed formula; Thraustochytrids; ปลานิล; จุลินทรีย์ทะเล; การเสริมอาหาร; โอเมก้า 3; อัตราการเจริญเติบโต; อัตรารอดตาย; ค่าดัชนีตับ; สูตรอาหารสัตว์น้ำ; ปริมาณอาหารที่ได้รับ.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5776

Distribution and biodegradability of polyester degrading microorganisms isolated from soils in Thailand
Provedor de dados: 106
Autores: Jarerat, A.; Kittinapakul, K.; Sriroth, K.; Tokiwa, Y.
Palavras-chave: Biodegradability; Polyester; Thailand; Microorganisms.
Ano: 1998
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4834

Distribution of polycaprolactone (PCL) degrading microorganisms and degradation at high temperature
Provedor de dados: 106
Autores: Jarerat, A.; Sriroth, K.
Palavras-chave: Temperature; Microorganisms; Polycaprolactone.
Ano: 1997
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4843

ผลของการเสริม Schizochytrium sp. ในอาหารต่อการเจริญเติบโต และอัตรารอดตายของกุ้งก้ามกราม
Provedor de dados: 106
Autores: Anousone Sisouvong; Chalor Limsuwan; Niti Chuchird; Sutee Wongmaneeprateep.
The effects of dietary Schizochytrium sp. supplementation on growth and survival rate of giant freshwater prawn (Macrobrachium rosenbergii) were studied. The prawns (approximate weight of 0.5 g/prawn) were fed with pelleted feed supplemented with Schizochytrium sp. at the levels of 0% (control group), 2.5%, 5.0%, 7.5% and 10.0%. Fifteen prawns were used for each treatment with the experiments being carried out in triplicate. Initial weight of the prawns was measured at the beginning of the experiment and after culturing for 50 days in suitable conditions, final weight, weight gain and survival rate of the prawns were recorded. The results showed that survival rates of the prawns were not significantly different regardless of levels of Schizochytrium sp....
Tipo: PhysicalObject
Palavras-chave: Giant freshwater prawn; Macrobrachium rosenbergii; Dietary supplementation; Schizochytrium; Microorganisms; Omega 3; Growth performance; Survival rate; กุ้งก้ามกราม; จุลินทรีย์ทะเล; การเสริมอาหาร; โอเมก้า 3; กรดไขมันอิ่มตัว; อัตราการเจริญเติบโต; อัตรารอดตาย; ปริมาณอาหารที่ได้รับ.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5784

Nutritional evaluation of silage with coffee (Coffea Arabica L.) cherry for ruminant supplementation
Provedor de dados: 109
Autores: Aguirre-Fernández,Paola Andrea; Acosta-Pinto,Liria María; Cardozo-Corzo,Luz Dary; Rodríguez-Arenas,Sergio Andrés; Corredor-Sánchez,Guillermo Arturo.
Abstract The aim of this study was to evaluate nutritionally coffee cherry (Coffea Arabica L.) silages with different additives: efficient microorganisms (EM) and kumis, to be used in ruminant supplementation. Micro silos were prepared according to treatments: a control treatment with coffee cherry and two experimental treatments with additives (cherry + EM and cherry + commercial kumis). Five fermentation times (1, 8, 16, 21 and 31 days) were evaluated for pH and temperature, and three fermentation times (1, 16 and 31 days) were evaluated for dry matter, protein and neutral detergent fiber; organoleptic indicator evaluation (smell, color and texture) was performed at day 31. A completely randomized design with factorial arrangement was used and linear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Additives; Feeds; Fermentation; Organoleptic properties; Microorganisms; Kumis.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200326

Microbiological attributes of a cultivated Plinthosol with sugarcane on different levels of straw
Provedor de dados: 109
Autores: Torres-Pórtela,Mirya Grazielle; Carvalho-Leite,Luiz Fernando; Pires-Barbosa,Ranyellson.
Abstract The objective of this work was to evaluate the microbiological attributes of a Plinthossol cropped with sugar cane in straw. The experiment was installed in União (04 ° 51’09”S and 42 ° 53’10 ‘’ W, altitude 52 m), northern region of Piauí state, Brazil. The experimental design was randomized blocks, with four replications, and treatments corresponding to different rates of straw (Mg.ha-1) (0, 4.19, 9.54, 13.04 and 18.38). Microbiological attributes were determined at a depth of 0-10 cm. Data was submitted to analysis of variance, cluster analysis and main components. An increase of straw in the soil influenced the stocks and contents of C, Cmic, Nmic, respiration and microbial and metabolic quotients. Cluster analysis combined the treatments into...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Multivariate; Biomass; Saccharum offcinarum; Soil organic matter.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000400306

Degradação ruminal da silagem de milho e da palha de arroz utilizando enzimas fibrolíticas exógenas - DOI: 10.4025/actascianimsci.v30i4.6462
Provedor de dados: 2
Autores: Martins, Adriana de Souza; CESCAGE; Vieira, Paulo de Figueiredo; UNIFENAS; Berchielli, Telma Teresinha; UNESP; Prado, Ivanor Nunes do; UEM.
Estudou-se o efeito da adição de enzimas fibrolíticas (celulase e xilanase) sobre a degradabilidade in situ da matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN), fibra em detergente ácido (FDA) e hemicelulose da silagem de milho (SM) e da palha de arroz (PA), utilizando seis bovinos fistulados no rúmen. Também foi avaliada a proporção de nitrogênio (N) insolúvel em detergente ácido em relação ao N total (NIDA/N total). As enzimas fibrolíticas foram extraídas dos fungos Aspergillus Níger e Trichoderma longibrachiatum, sendo fornecido 0,75 g kg-1 de MS animal-1 dia-1, via cânula ruminal. Os tempos de incubação foram: 0, 3, 6, 12, 24, 48, 72 e 96 h. Os resíduos de incubação foram comparados por meio da microscopia eletrônica de...
Palavras-chave: 5.04.03.00-1 Nutrição e Alimentação Animal celulase; Fibra; Microrganismos; Microscopia eletrônica; Rúmen. cellulose; Electron micrograph; Fiber; Microorganisms; Rumen.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6462

Effects of different lipid levels on protozoa population, microbial protein synthesis and rumen degradability in cattle - doi: 10.4025/actascianimsci.v34i3.12729
Provedor de dados: 2
Autores: Messana, Juliana Duarte; Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho”; Berchielli, Telma Teresinha; Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho”; Arcuri, Pedro Braga; Empresa Brasileira de Pesquisa Agropecuária, Setor Gado de Leite; Ribeiro, Andressa Ferreira; Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho”; Fiorentini, Giovani; Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho”; Canesin, Roberta Carrilho; Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista “Júlio de Mesquita Filho”.
Protozoa population, microbial synthesis efficiency and rumen degradability of dry matter and neutral detergent fiber in cattle fed on diets with different lipid rates were evaluated. Nine 16-month-old Nelore young bulls, cannulated in the rumen and duodenum, weighing 232 ± 35 kg, were used in the trial. Experimental design consisted of a 3 x 3 square in triplicate, comprising the following treatments: 2, 4 and 6% lipid in diet. In situ degradability was assessed by rumen incubation of corn silage, soybean, soybean meal and citrus pulp during 0, 3, 6, 12, 24, 48, 72 and 96h. The flow of microbial nitrogen and microbial efficiency were not influenced (p &amp;gt; 0.05) by the inclusion of lipid levels in the diet. When the animals received diet with 4%...
Tipo: Pesquisa de campo e analises laboratoriais
Palavras-chave: 5.04.00.00-2 (Zootecnia) degradability; Fat; Microorganisms; Ruminants; Soybean.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12729

Plant- and microbial-based mechanisms to improve the agronomic effectiveness of phosphate rock: a review
Provedor de dados: 42
Autores: Arcand,Melissa M.; Schneider,Kim D.
Deficiency in plant-available phosphorus is considered to be a major limiting factor to food production in many agricultural soils. Mineral resources are necessary to restore soil phosphorus content. In regions where conventional fertilizers are not used due to cost limitations or to mitigate adverse environmental effects, local sources of phosphate rock are being increasingly recognized for potential use as alternative phosphorus fertilizers. The main obstacle associated with using directly applied ground phosphate rock is that the phosphate released is often unable to supply sufficient plant-available phosphorus for crop uptake. Plantand microbial-based mechanisms are low-cost, appropriate technologies to enhance the solubilization and increase the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture; Microorganisms; Phosphate rock; Phosphorus; Rhizosphere; Solubilization.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400013

Chemical composition and nutrient degradability in elephant grass silage inoculated with Streptococcus bovisisolated from the rumen
Provedor de dados: 42
Autores: FERREIRA,DANIELE J.; ZANINE,ANDERSON M.; LANA,ROGÉRIO P.; RIBEIRO,MARINALDO D.; ALVES,GUILHERME R.; MANTOVANI,HILÁRIO C.
The objective of the present study was to assess the chemical and bromatological composition and in situ degradability of elephant grass silages inoculated with Streptococcus bovisisolated from cattle rumen. A complete randomized design was used with four treatments and six replications: elephant grass silage, elephant grass silage inoculated with 106 CFU/g Streptococcus bovisJB1 strains; elephant grass silage inoculated with 106 CFU/gStreptococcus bovis HC5 strains; elephant grass silage inoculated with 106 CFU/g Enterococcus faeciumwith six replications each. The pH and ammoniacal nitrogen values were lower (P&lt;0.05) for the silages inoculated with Streptococcus bovis JB1 and HC5, respectively. The silage inoculated withStreptococcus bovis had a higher...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestion; Microorganisms; Nutritive value; Ruminant.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100465

Exogenous enzyme complex prevents intestinal soybean meal-induced enteritis in Mugil liza (Valenciennes, 1836) juvenile.
Provedor de dados: 42
Autores: RAMOS,LEONARDO R.V.; PEDROSA,VIRGÍNIA F.; MORI,AGNES; ANDRADE,CARLOS F.F. DE; ROMANO,LUIS A.; ABREU,PAULO C.; TESSER,MARCELO B.
ABSTRACT Four soybean meal-based diets containing increasing levels of an enzyme complex (E50, E100, E150 and E200 at 50, 100, 150 and 200 g ton-1, respectively) and one soybean meal-based diet without the enzyme complex (E0) were fed in triplicate to M. liza juveniles in a semi-static flow system with 20 fish per tank for 75 days. There were no differences between the treatments for animal performance parameters, but fish fed the enzyme complex treatment exhibited significantly (P&lt;0.05) higher values of calcium bone retention compared with control fish. Although there was no relationship between bacterial counts in different sections of the gastrointestinal tract or enzyme levels, filamentous bacteria were increased in E50 compared with E150. All of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbohydrase; Growth; Histology; Microorganisms; Mullet; Phytase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100341

Prevalence and etiology of buffalo mastitis and milk somatic cell count in dry and rainy seasons in a buffalo herd from Analândia, São Paulo State, Brazil
Provedor de dados: 45
Autores: Pizauro,L.J.L.; Silva,D.G.; Santana,A.M.; Clemente,V.; Lara,G.H.B.; Listoni,F.J.P.; Vaz,A.C.N.; Vidal-Martins,A.M.C.; Ribeiro,M.G.; Fagliari,J.J.
The aim of this study was to evaluate somatic cell count (SCC), prevalence and etiology of mastitis in a dairy buffalo herd from Analândia, São Paulo State, Brazil, in the dry and rainy seasons. Additionally, antimicrobial susceptibility profile of microorganisms isolated from milk samples was also evaluated. 1,042 milk samples from female Murrah buffaloes in a dairy farm located in Analândia, São Paulo State, Brazil, collected between May 2011 and November 2012 were analyzed. After the mammary gland physical examination, strip cup test and California Mastitis Test (CMT) were performed. Afterwards, 50mL of milk samples from each mammary quarter were collected aseptically for SCC in automatic equipment and microbiological examination. The antimicrobial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiogram; Bubalus bubalis; SCC; Mammary gland; Microorganisms.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352014000601703

Bubaline mastitis etiology in Northeast of Brazil
Provedor de dados: 45
Autores: Medeiros,E.S.; Freitas,M.F.L.; Pinheiro Júnior,J.W.; Saukas,T.N.; Krewer,C.C.; Santos,A.S.; Costa,M.M.; Mota,R.A.
Este estudo teve como objetivo avaliar a frequência de mastite clínica e subclínica e descrever os micro-organismos envolvidos no processo inflamatório da glândula mamária nos rebanhos de búfalos leiteiros no Nordeste do Brasil. Foram analisadas 1.896 amostras de leite provenientes de 474 búfalos em quatro propriedades localizadas nos Estados de Alagoas, Bahia, Ceará e Pernambuco. Após o exame físico da glândula mamária, as amostras de leite de cada teto foram submetidas aos testes da caneca do fundo preto e CMT (California Mastitis Test). As amostras que apresentaram scores ++ e +++ no CMT e as positivas para a caneca do fundo preto foram submetidas ao exame microbiológico. Do total de amostras estudadas, 90/1.896 (4,74%) apresentaram mastite clínica. Com...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Milk; Mammary gland; Buffaloes; Microorganisms.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000600043

Absorption efficiency in post-larvae of the shrimp Litopenaeus vannamei fed a diet of marine yeast from mangrove mudflats
Provedor de dados: 50
Autores: Solorzano-Reyes,Fulvia; Velásquez-López,Patricio C.
ABSTRACT The present study investigated marine yeast as a food source in the Pacific white shrimp Litopenaeus vannamei. Yeast absorption efficiency was determined by measuring the proportion of organic matter assimilated by shrimp post-larvae (PLs). The yeast was isolated and propagated in the laboratory from a sediment sample obtained from a mangrove mudflat. Shrimp post-larvae at six stages, from PL-5-days-old to PL-35-days-old were fed exclusively with yeasts, at three concentrations (1.5 × 105, 3 × 105, 5 × 105cell/mL). The overall average of yeast absorption was around 65.85 ± 11.42 %. The two-way analysis of variance ANOVA (p &lt; 0.05) showed that the efficiency of yeast absorption was not affected by the concentrations of yeasts as a food source:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuarine aquaculture; Food absorption; Mangroves; Microorganisms; Pacific white shrimp.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612021000200073

Benefits Associated with the Interaction of Endophytic Bacteria and Plants
Provedor de dados: 52
Autores: Santos,Miriam Langner dos; Berlitz,Diouneia Lisiane; Wiest,Shana Leticia Felice; Schünemann,Rogerio; Knaak,Neiva; Fiuza,Lidia Mariana.
ABSTRACT The endophytic bacteria belong to a larger group of microorganisms that have their life-cycle partly or entirely inside the plant and are located in intra and inter-cellular spaces or in the vascular tissue. These bacteria can be found colonizing aerial parts or roots. This review aims to analyze the colonization strategies of endophytic bacteria through interaction with plants, as well as to highlight the metabolic influence of these organisms in plant tissues, which result in physiological and biochemical changes. Depending on the different mechanisms used internally to colonize a plant, these microorganisms are called obligate, facultative, or passive endophytes. Phytostimulation, biofertilization and biological control are mechanisms that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofertilization; Biological control; Colonization strategies; Microorganisms; Phytostimulation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100200

Ultrasound efficiency in relation to sodium hypochlorite and filtration adsorption in microbial elimination in a water treatment plant
Provedor de dados: 52
Autores: Bello,Antonio Roberto Crystal; Angelis,Dejanira de Franceschi; Domingos,Roberto Naves.
Processes like ultrasound, chlorination and filtration-adsorption were compared to eliminate microorganisms and to adjust established parameters of public drinking water. A mini water treatment plant (WTP-CB), in pilot scale, was projected and built to evaluate each process influence as: decontamination, coagulation-flocculation, sedimentation and filtration. Total and fecal coliforms, Escherichia coli and heterotrophic bacteria and physic/chemical parameters were quantified from water. Ultrasound, chlorination and filtration-adsorption were efficient to inactivate and/or eliminate bacteria. Ultrasound decontamination in addition to coagulation-flocculation, sedimentation and filtration, could be considered as an alternative treatment water solution where...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Filtration; Microorganisms; Ultrasound; Chlorination.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000600009

Microbiological and physicochemical treatments applied to metallurgic industry aiming water reuse
Provedor de dados: 52
Autores: Bello,Antonio Roberto Crystal; Angelis,Dejanira de Franceschi de; Domingos,Roberto Naves.
A study was conducted on the reuse of the water in a system composed of a sewage treatment plant (STP) using prolonged aeration with activated sludge and a compact water treatment plant (CWTP) in a metallurgic industry. The processes for obtaining the water for reuse were microbiological and physicochemical. The domestic sewage was then pumped to the STP, where biological flocks were formed and clarified water was obtained. The efficiency of the microbiological process in the STP was evaluated for removal of biochemical oxygen demand (BOD), chemical oxygen demand (COD) and sedimentary solids (SS). The efficiency of physicochemical processes for clarifying the water and disinfection was evaluated through analysis of pH, turbidity, color, aerobic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water; Reuse; Sewage; Microorganisms; Disinfection.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200020

Trophic state and microorganisms community of major sub-basins of the middle Rio Doce basin, southeast Brazil
Provedor de dados: 52
Autores: Petrucio,Mauricio Mello; Medeiros,Adriana Oliveira; Rosa,Carlos Augusto; Barbosa,Francisco Antônio Rodrigues.
Total phosphorus concentration was used to define the trophic state of the main sub-basins of the middle Rio Doce, in Minas Gerais State (southeast Brazil) and physical, chemical, and microbiological variables of water were analyzed during 2000 to 2001. The study evaluated changes in water quality caused by seasonality and human activities. Water temperature, conductivity, pH, total alkalinity, dissolved oxygen, and concentrations of NH4-N, NO2-N, NO3-N, total-N, PO4-P, total-P, DOC, and chlorophyll-a were measured in seven rivers stretches (sampling stations). Total yeasts, faecal and total coliforms, and heterotrophic bacteria were also determined. The studied areas were considered to be under oligotrophic to eutrophic conditions. The variables that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Phosphorus; Rivers; Trophic state.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500015

Performance of the constructed wetland system for the treatment of water from the corumbataí river
Provedor de dados: 52
Autores: Borges,Ana Kleiber Pessoa; Tauk-Tornisielo,Sâmia Maria; Domingos,Roberto Naves; Angelis,Dejanira de Franceschi de.
The aim of this work was to study the constructed wetland system for the treatment of water from the Corumbataí river simulated on a laboratory scale. The parameters analyzed at different points of the system were ammonia, biochemical demand for oxygen (BDO), chemical demand for oxygen (CDO), chlorides, apparent color, conductivity, dissolved oxygen, magnesium (Mg), sodium (Na), potassium (K), silicon (Si), total phosphorous, total coliforms and Escherichia coli, total dissolved solids (TDS), turbidity, and macrophyte biomass. The results demonstrated that this alternative water treatment system was effective in removing the microorganisms (total coliforms and E. coli), among other parameters analyzed, for varying periods of the treatment, promoting...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquatic macrophytes; Filtering soil; Microfiltration; Bioreactor; Microorganisms.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600024

Comparative study of etiological diagnosis of nosocomial pneumonia
Provedor de dados: 55
Autores: Carvalho,Eliane Maria de; Massarollo,Paulo Celso Bosco; Levin,Anna S.; Isern,Maria Rita Montenegro; Pereira,Wilson Leite; Abdala,Edson; Rossi,Flavia; Mies,Sérgio.
Nosocomial pneumonia is a common complication in patients on mechanical ventilation and results in significant mortality. Diagnosis of pneumonia in patients who are intubated and under mechanical ventilation is difficult, even with the aid of clinical, laboratorial, and endoscopic tests. The objective of this study was to compare three methods of tracheal sputum collection in patients with a clinical and radiological diagnosis of pneumonia. Twenty-two patients with a clinical diagnosis of liver disease were enrolled, 18 years of age or older, 13 males and nine females, who had been mechanically ventilated over an intubation period of 5.86 ± 4.62 days. These patients were being treated in intensive care unit (ICU) of the Liver Transplantdepartment....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pneumonia; Microorganisms; Bronchoalveolar lavage; Tracheal aspiration; Closed aspiration system.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702008000100015

Acceptable microorganisms concentration in a semen sample for in vitro embryo production
Provedor de dados: 58
Autores: D'Angelo,Magali; Pavão,Danielle L.; Melo,Gisele Martins; Rojas,Natali; Souza,Rosimeire Joaquim; Athayde,Christiani; Galuppo,Andrea Giannotti; Pinheiro,Eliana Scarcelli.
The aim of this study was to report that the acceptable concentration of microorganisms in a semen sample for insemination may not be safe for an in vitro fertilization procedure. It seems that the semen sample should be completely germ-free, because of the excellent microorganism proliferation condition promoted by the in vitro environment.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Semen; Microorganisms; In vitro fertilization.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400031

Soil amendment with sewage sludge and its impact on soil microflora
Provedor de dados: 58
Autores: Vieira,Rosana Faria; Silva,Célia Maria Maganhotto de Souza.
The objective of this work was to verify the effect of frequent sludge soil amendments on the soil's activity and microbial biomass C. Results showed that the use of excessive sludge doses could be detrimental to the soil's microflora.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microorganisms; Nitrogen; Biosolid.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500019

Production of gaba (γ - aminobutyric acid) by microorganisms: a review
Provedor de dados: 58
Autores: Dhakal,Radhika; Bajpai,Vivek K.; Baek,Kwang-Hyun.
GABA (γ-aminobutyric acid) is a four carbon non-protein amino acid that is widely distributed in plants, animals and microorganisms. As a metabolic product of plants and microorganisms produced by the decarboxylation of glutamic acid, GABA functions as an inhibitory neurotransmitter in the brain that directly affects the personality and the stress management. A wide range of traditional foods produced by microbial fermentation contain GABA, in which GABA is safe and eco-friendly, and also has the possibility of providing new health-benefited products enriched with GABA. Synthesis of GABA is catalyzed by glutamate decarboxylase, therefore, the optimal fermentation condition is mainly based on the biochemical properties of the enzyme. Major GABA producing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: GABA (γ-aminobutyric acid); Microorganisms; Optimal conditions; Lactic acid bacteria; GABA-enriched food.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400001

Improved 1-Deoxynojirimycin (DNJ) production in mulberry leaves fermented by microorganism
Provedor de dados: 58
Autores: Jiang,Yun-Gang; Wang,Chu-Yan; Jin,Chao; Jia,Jun-Qiang; Guo,Xijie; Zhang,Guo-Zheng; Gui,Zhong-Zheng.
DNJ, an inhibitor of α-glucosidase, is used to suppress the elevation of postprandial hyperglycemia. In this study, we focus on screening an appropriate microorganism for performing fermentation to improve DNJ content in mulberry leaf. Results showed that Ganoderma lucidum was selected from 8 species and shown to be the most effective in improvement of DNJ production from mulberry leaves through fermentation. Based on single factor and three factor influence level tests by following the Plackett-Burman design, the optimum extraction yield was analyzed by response surface methodology (RSM). The extracted DNJ was determined by reverse-phase high performance liquid chromatograph equipped with fluorescence detector (HPLC-FD). The results of RSM showed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mulberry; DNJ Production; Microorganisms; Fermentation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200048

Thiocyanate degradation by pure and mixed cultures of microorganisms
Provedor de dados: 58
Autores: Souza-Fagundes,Elaine M.; Rosa,Luiz H.; Gomes,Newton C.M.; Santos,Mércia H.; Pimentel,Patricia F.
A mixed culture and a pure bacterial strain (BMV8) were isolated from a bioreactor for thiocyanate treatment. Both cultures removed 5 mM of thiocyanate from the medium in 36 hours. The mixed culture was able to tolerate concentrations up to 60 mM. The efficiency of thiocyanate degradation decreased when the cells were immobilized.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodegradation; Cyanate; Immobilization; Microorganisms; Thiocyanate.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300012

Integrated evaluation of soil quality after the incorporation of organic matter and microorganisms
Provedor de dados: 58
Autores: Valarini,Pedro J.; Alvarez,Mª Cruz Díaz; Gascó,José Mª; Guerrero,Francisca; Tokeshi,Hasime.
The soil quality was evaluated following the addition of organic matter and microorganisms to a clay loam soil collected in Aranjuez (Madrid) under controlled conditions of temperature and moisture, and over a period of three months. The following treatments were carried out: soil (control); soil + 50 t/ha of animal manure (E50); soil + 50 t/ha of animal manure + 30l/ha of effective microorganisms (E50EM); soil + 30 t/ha of combination of various green crop residues and weeds (RC30) and soil + 30 t/ha of combination of various green crop residues and weeds + 30l/ha of effective microorganisms (RC30EM). The soil samples were taken before and after the incubation and analysed using physical, chemical and microbiological parameters. A significant increase in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methodology; Organic matter; Microorganisms; Physico-chemical; Microbiological soil properties.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100007

Leaf-cutting ant faecal fluid and mandibular gland secretion: effects on microfungi spore germination
Provedor de dados: 58
Autores: Rodrigues,André; Carletti,Carla D.; Bueno,Odair C.; Pagnocca,Fernando C.
The mandibular gland secretion (MGS) and the faecal fluid (FF) of the leaf-cutting ant Atta sexdens rubropilosa Forel affected the spore germination of selected microfungi isolated from nests of this insect. MGS was more effective than the FF, completely inhibiting the spore germination of four out of six microfungi species.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungus garden; Microorganisms; Atta.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100016

Microbial degradation of sulfentrazone in a Brazilian rhodic hapludox soil
Provedor de dados: 58
Autores: Martinez,Camila O.; Silva,Celia Maria M. S.; Fay,Elisabeth F.; Abakerli,Rosangela B.; Maia,Aline H. N.; Durrant,Lucia R.
Sulfentrazone is amongst the most widely used herbicides for treating the main crops in the State of São Paulo, Brazil, but few studies are available on the biotransformation of this compound in Brazilian soils. Soil samples of Rhodic Hapludox soil were supplemented with sulfentrazone (0.7 µg active ingredient (a.i.) g-1 soil) and maintained at 27ºC. The soil moisture content was corrected to 30, 70 or 100 % water holding capacity (WHC) and maintained constant until the end of the experimental period. Herbicide-free soil samples were used as controls. Another experiment was carried out using soil samples maintained at a constant moisture content of 70% WHC, supplemented or otherwise with the herbicide, and submitted to different temperatures of 15, 30 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Degradation; Microorganisms; Half-life.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100030

Stoking residue from extraction of cassava starch without the use of storage technologies
Provedor de dados: 65
Autores: Javorski,Cleovani Rossi; Zambom,Maximiliane Alavarse; Pozza,Magali Soares dos Santos; Fernandes,Tatiane; Castagnara,Deise Dalazen; Paladini,Simoni; Tinini,Rodrigo Cesar dos Reis; Neres,Marcela Abbado.
The purpose of this paper was to study the storage of the residue from the extraction of cassava starch without the use of storage technologies, through chemical evaluation, pH values, temperature, development of microorganisms and mycotoxins. A randomized block design was used with eight treatments (different storage periods: 0, 3, 6, 9, 12, 15, 18 and 21 days) and five replications. There was a significant difference for DM content, as a function of days in storage. The chemical composition of the residue from the extraction of cassava starch did not changed throughout the storage period. A negative linear effect was obtained for the pH values, which decreased with days in storage. There was significance of the storage period only for the fungus and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Manihot esculenta; Wet material; Mycotoxins; Microorganisms.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000300405

Antimicrobial activity and chemical characterization of the bark decoction of cumaru stem
Provedor de dados: 65
Autores: Ferreira,Maria Jaiana Gomes; Nogueira,Patrícia Coelho do Nascimento; Dias,Flayanna Gouveia Braga; Silva,Larissa Morais Ribeiro da; Silveira,Edilberto Rocha; Figueiredo,Evânia Altina Teixeira de.
ABSTRACT: The plant, Amburana cearensis A. C. Smith (Fabaceae), commonly called cumaru, is widespread in the Caatinga cearense, a less known ecosystem in Brazil. A. cearensis is rich in several compounds like protocatechuic acid, tannins, coumarin, flavonoids and phenolic heterosides, such as amburosides A and B, that have been isolated. The aim of this study was to determine the antimicrobial potential and draw the chemical profile of the distinct characteristics of A. cearensis stem bark decoction, for its possible potential as a food conservation agent. The chemical compounds were characterized by one- and two-dimensional 1H and 13C NMR analyses and Liquid Chromatography-Mass Spectrometry (LCMS). The compounds of coumarin, amburosides A and B, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioactive compounds; Microorganisms; Natural antimicrobials.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300452

Digestibility, fermentation and microbiological characteristics of Calotropis procera silage with different quantities of grape pomace
Provedor de dados: 64
Autores: Belém,Clérison dos Santos; Souza,Anderson Miranda de; Lima,Patrícia Rodrigues de; Carvalho,Francisco Allan Leandro de; Queiroz,Mário Adriano Ávila; Costa,Mateus Matiuzzi da.
ABSTRACT Preserving forage plants adapted to a semi-arid climate as silage may minimize the animal feed deficit during drought. The objective of this study was to evaluate the effects of different quantities of grape pomace added to Calotropis procera silage on its fermentation, in vitro digestibility, total digestible nutrients and microbiology. A completely randomized experimental design was used with four treatments (0, 10, 20 and 40% fresh matter) and four replicates. The silos were opened after 90 days of ensilage, and the soluble carbohydrate, ethanol, organic acid and ammoniacal nitrogen concentrations; pH; fermentation loss; dry matter (DM) recovery; DM density, and microbial populations were determined. The pH (3.96-3.87) was adequate for ensiling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fermentation losses; Microorganisms; Organic acids.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000600698