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Pesquisa : D08.811.277.656 [Categoria DeCS]
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Id: biblio-1001902
Autor: Santis, Laís Priscila De; Garcia, Patrícia Carvalho; Secco, Valéria Nogueira Dias Paes; Ferreira, Rosana Rossi; Deffune, Elenice.
Título: Applicability of papain solutions in immunohematology / Aplicabilidade de soluções de papaína em imuno-hematologia
Fonte: Einstein (Säo Paulo);17(2):eAO4328, 2019. tab, graf.
Idioma: en.
Resumo: ABSTRACT Objective: To compare the enzyme activity of different presentations of papain solution to validate in-house preparations. Methods: Two papain solutions were prepared, and the third presentation was a commercial solution. Tests were carried out with samples of red cells typed as weak RhD. Results: In-house prepared papain solutions showed similar enzyme reactivity, and statistically no differences compared to the enzyme activity of the commercial solution. Conclusion: Evaluating the cost-benefit ratio, the in-house prepared papain solutions present more economic advantages, and can be incorporated into immunohematological routines as a way to cope with periods of financial crisis and cost-containment policies.

RESUMO Objetivo: Comparar a atividade enzimática de diferentes apresentações de solução de papaína para validação de preparados in-house. Métodos: Foram preparadas duas soluções de papaína, e a terceira apresentação tratou-se de uma solução comercial. Os testes comparativos das reações enzimáticas foram realizados com amostras de hemácias tipadas como RhD fraco. Resultados: As soluções de papaína preparadas in-house apresentaram reatividade enzimática semelhante e estatisticamente sem diferenças em comparação com a atividade enzimática da solução comercial. Conclusão: Avaliando-se a relação entre custo e benefício, as soluções de papaína preparadas in-house são economicamente vantajosas, podendo ser incorporadas às rotinas imuno-hematológicas como forma de enfrentamento em períodos de crise financeira e em políticas de retenção de gastos.
Descritores: Peptídeo Hidrolases/química
Soluções/normas
Papaína/química
Eritrócitos/enzimologia
Testes Hematológicos/normas
-Peptídeo Hidrolases/economia
Sistema do Grupo Sanguíneo Rh-Hr/economia
Sistema do Grupo Sanguíneo Rh-Hr/química
Soluções/economia
Fatores de Tempo
Testes de Aglutinação/métodos
Papaína/economia
Reprodutibilidade dos Testes
Testes Hematológicos/economia
Limites: Humanos
Tipo de Publ: Estudo de Validação
Responsável: BR1.1 - BIREME


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Id: biblio-1055405
Autor: Silva, Anna Carolina da; Queiroz, Alana Emilia Soares de França; Oliveira, João Tiago Correia; Medeiros, Erika Valente; Souza-Motta, Cristina Maria de; Moreira, Keila Aparecida.
Título: Antioxidant Activities of Chicken Egg White Hydrolysates Obtained by New Purified Protease of Aspergillus avenaceus URM 6706
Fonte: Braz. arch. biol. technol;62:e19180062, 2019. tab, graf.
Idioma: en.
Projeto: FACEPE; . CAPES.
Resumo: Abstract Protein hydrolysates originating from egg white have already been reported to be bioactive and, among their biological activities, possess the antioxidant property that protects the body from early ageing and diseases linked to oxidation. Therefore, the objective of this work was to evaluate the antioxidant activity of hydrolysates obtained by the hydrolysis of egg white from hen poultry. The protease produced by Aspergillus avenaceus URM 6706 was purified and subsequently applied to hydrolysate the egg white, and the degree of hydrolysis was verified during the protease exposure time (4-24 h). The hydrolysis was intensified over time of exposure to the protease. It was possible to detect the antioxidant activities of eliminating the 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) radical (ABTS•+) from 97% to 99% and 2,2-diphenyl-1-picrylhydrazyl (DPPH•) up to 27%, as well as the chelation of Cu2+ metal ions up to 62% and Fe2+ up to 54%. The elimination of ABTS•+ radical had a positive correlation with the degree of hydrolysis; however, all the other activities tested showed a negative correlation with the degree of hydrolysis. The results obtained suggest that the egg white of hen chicken represents a food source of animal origin with potential application in the functional food industry.
Descritores: Aspergillus
Quelantes
Clara de Ovo
-Peptídeo Hidrolases
Antioxidantes
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-1287438
Autor: Frías-Quintana, Carlos Alfonso; Peña-Marín, Emyr Saul; Ramírez-Custodio, Carlos David; Martínez-García, Rafael; Jiménez-Martínez, Luis Daniel; Camarillo-Coop, Susana; Guerrero-Zárate, Rocío; Asencio-Alcudia, Gloria Gertrudys; Álvarez-González, Carlos Alfonso.
Título: Comparative characterization of digestive proteases in redhead cichlid (Vieja melanurus) and twoband cichlid (Vieja bifasciata) (Percoidei: Cichlidae)
Fonte: Neotrop. ichthyol;19(1):e200095, 2021. graf.
Idioma: en.
Projeto: FOMIX CONACYT - Government of the State of Tabasco.
Resumo: In the Southeast of Mexico, there are many native cichlids with commercial interest such as redhead cichlid (Vieja melanurus) and twoband cichlid (V. bifasciata), which have a great local demand and excellent meat quality. However, it is necessary to implement their culture based on nutrition studies and digestive biochemistry. This study's objective was to characterize these two cichlids' digestive proteases (pH, temperature, and inhibitors) through biochemistry techniques. Results showed that V. melanurus and V. bifasciata have a digestive capacity analogous to other omnivore fishes, where the optimal pH values of stomach proteases (4 and 2, respectively) and intestinal proteases (6 and 12, respectively), the optimal temperature of acid (35°C and 55°C, respectively) and alkaline proteases (45°C and 55°C, respectively) are quite similar. Both species presented high thermal and pH stabilities. Inhibition showed that V. melanurus is more sensitive to specific inhibitors for alkaline proteases than V. bifasciata. In conclusion, V. bisfasciata and V. melanurus have different digestive protease patterns. Both species can hydrolyze different protein ingredients to formulate a specific diet. Nevertheless, V. bifasciata is more resistant to the presence of inhibitors, which allow it to include vegetable proteins in its diet.(AU)

En el sureste de México, existen muchas especies de cíclidos nativos de interés comercial como el cíclido rojo (Vieja melanurus) y el cíclido de dos bandas (V. bifasciata), los cuales tienen una gran demanda local y tienen una excelente calidad de carne; sin embargo, es necesario implementar su cultivo con base en estudios de nutrición y bioquímica digestiva. El objetivo de este estudio fue caracterizar las proteasas digestivas (pH, temperatura e inhibidores) de estos dos cíclidos nativos mediante técnicas bioquímicas. Los resultados mostraron que V. melanurus y V. bifasciata tienen una capacidad digestiva similar a otros peces omnívoros, donde los valores óptimos de pH de proteasas estomacales (4 y 2, respectivamente) e intestinales (6 y 12, respectivamente), la temperatura óptima de proteasas ácidas (35°C y 55°C, respectivamente) y alcalinas (45°C y 55°C, respectivamente) son muy parecidas. Ambas especies presentaron alta estabilidad térmica y de pH. La inhibición mostró que V. melanurus es más sensible a inhibidores específicos de proteasas alcalinas que V. bifasciata. En conclusión, V. bisfasciata y V. melanurus tienen diferentes patrones de proteasas digestivas, pero ambas especies pueden hidrolizar diversos ingredientes proteicos para formular dietas específicas; sin embargo, V. bifasciata es más resistente a la presencia de inhibidores, lo que permitiría incluir proteínas vegetales en su dieta.(AU)
Descritores: Peptídeo Hidrolases
Perciformes/fisiologia
Fenômenos Fisiológicos do Sistema Digestório
Inibidores Enzimáticos
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-1278433
Autor: Gul, Anum; Siddiqui, Maryam; Arain, Habiba; Khan, Sadaf; Khan, Hanzala; Ishrat, Urooj.
Título: Extraction, Partial Purification and Characterization of Bromelain from Pineapple (Ananas Comosus) Crown, Core and Peel Waste
Fonte: Braz. arch. biol. technol;64:e21200639, 2021. tab, graf.
Idioma: en.
Projeto: Higher Education Commission.
Resumo: Abstract Ananas Comosus (also known as pineapple) is a part of Bromeliaceae family and it is consumed as food as well as folk medicine for the treatment of various diseases. It is reported that pineapple is a rich source of bromelain, a cysteine protease and it is considered as an important enzyme in different industries due to its significant therapeutic and industrial applications such as anticancer, anti-inflammatory and meat tenderizing. Bromelain is mostly present in fruit and stem of pineapple, but it is reported that crown, core, and peels, which constitute the waste of the pineapple plant, also contain bromelain but limited data is available. Therefore, the proposed study aimed at utilizing pineapple waste for the extraction and characterization of bromelain. Firstly, crude bromelain was extracted with phosphate buffer (pH 7), then it was subjected to partial purification using different fractions of ammonium sulphate (NH4)2SO4 such as 30, 40, 50 and 60% followed by desalting and concentration. Enzyme activity was calculated by using casein digesting unit (CDU) method. The results demonstrated that the crown bromelain showed highest purification of 4.34-fold at 30% (NH4)2SO4 saturation, whereas core and peel bromelain showed highest purification of 2.75 and 2.59-fold at 40% (NH4)2SO4 saturation. The molecular weight of crude and partially purified bromelain was determined by SDS-PAGE analysis and found to be 26 KDa. The pH and thermal stability of all the parts of pineapple showed maximum stability at pH 7 and at 35oC temperature.
Descritores: Bromelaínas/isolamento & purificação
Ativação Enzimática
Sulfato de Amônio
-Peptídeo Hidrolases
Eletroforese em Gel de Poliacrilamida
Responsável: BR1.1 - BIREME


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Id: biblio-1278444
Autor: Sharma, Vishakha; Aseri, Gajender; Bhagwat, Prashant; Jain, Neelam; Ranveer, Rahul Chudaman.
Título: Production, Purification and Characterization of a Novel Bacteriocin Produced by Bacillus subtilis VS Isolated from Mango (Mangifera indica L)
Fonte: Braz. arch. biol. technol;64:e21190749, 2021. tab, graf.
Idioma: en.
Resumo: Abstract Bacteriocin has been identified as an excellent alternative to chemical preservatives due to its astonishing antimicrobial activity against food spoiling and food-borne pathogens. So there is a need to identify the newer and potent sources of bacteriocin producers. This study aims the isolation of potent bacteriocin producing microorganism from fresh fruits and vegetables, its production, purification, and characterization. Firstly, 43 isolates were analysed for its antimicrobial potential, out of which7 were found to inhibit the growth of various pathogens. Considering the results of antimicrobial activity; the microorganism isolated from mango was regarded as the most potent one; which was identified as Bacillus subtilis VS.70% ammonium sulphate precipitated and dialysed bacteriocin was purified using DEAE cellulose and sephadex G75 chromatography. Bacteriocin was purified by 24.64 fold with 8.65% recovery and its molecular weight was found to be 31.2kDa. The Purified bacteriocin was found to be stable at broad pH and temperature. It was found to be degraded by various proteases studied confirming its proteinaceous nature. Considering all these attributes; the purified bacteriocin isolated from Bacillus subtilis VS can be exploited by various food industries.
Descritores: Peptídeo Hidrolases/análise
Bacteriocinas/análise
Anti-Infecciosos/análise
-Bacillus subtilis
Cromatografia
Responsável: BR1.1 - BIREME


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Id: biblio-1041422
Autor: Paula-Mattiello, Shaiana; Oliveira, Sílvia Dias de; Medina-Silva, Renata.
Título: In vitro evaluation of hydrolytic enzyme activity and biofilm formation of Candida parapsilosis species complex from a nosocomial environment
Fonte: Rev. Soc. Bras. Med. Trop;50(4):558-561, July-Aug. 2017. tab, graf.
Idioma: en.
Resumo: Abstract INTRODUCTION: Candida parapsilosis complex species, frequently found in hospital environments, have gained importance as etiological agents of candidemia. METHODS: Candida parapsilosis complex isolates from a nosocomial environment were identified and their hydrolitic enzyme activity and ability to form biofilm were characterized. RESULTS: Twenty-two C. parapsilosis sensu stricto isolates produced proteinase and three produced phospholipase. Most Candida metapsilosis isolates produced proteinase and one also produced phospholipase. All 29 isolates formed biofilms. CONCLUSIONS: The nosocomial environment may act as a reservoir for C. parapsilosis complex isolates with phenotypic features that could possibly lead to nosocomial infections and health complications in hospital patients.
Descritores: Peptídeo Hidrolases/biossíntese
Fosfolipases/biossíntese
Candida/enzimologia
Biofilmes/crescimento & desenvolvimento
-Candida/isolamento & purificação
Candida/metabolismo
Ambiente de Instituições de Saúde
Hidrólise
Responsável: BR1.1 - BIREME


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Id: biblio-1132169
Autor: Rosa-Garzon, Nathalia Gonsales da; Siqueira, Ana Claudia Rodrigues de; Hirano, Viviane Naomi; Rodrigues, André; Pessela, Benevides Costa; Cabral, Hamilton.
Título: Amino Acid Supplementation Improves the Production of Extracellular Peptidases by Aspergillus Section Flavi and their Ionic Immobilization
Fonte: Braz. arch. biol. technol;63:e20190127, 2020. graf.
Idioma: en.
Projeto: Fundação de Amparo à Pesquisa do Estado de São Paulo; . Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.
Resumo: Abstract Bioprocess studies have been highlighted due to the importance of physiological processes and industrial applications of enzymes. The potential of peptidase production from Aspergillus section Flavi using different amino acids as a supplemental nitrogen source was investigated. A production profile revealed that amino acids had positive effects on peptidase production when compared to the control without amino acids. Optimal production (100 U/mL) was obtained with Arginine amino acid in 96 h of fermentation. Extracellular peptidase from Aspergillus section Flavi was identified in submerged bioprocesses by in situ activity. Biochemical studies revealed that the maximum activities of the enzyme extract were obtained at pH 6.5 and a temperature of 55°C. The inhibition by EDTA and PMSF suggests the presence of more than one peptidase while the Ni2+ and Cu2+ had a negative influence on the enzyme activity. When the crude extract was reversibly immobilized on ionic supports, DEAE-Agarose and MANAE-Agarose the derivative showed different profiles of thermal and pH stabilities. Hence, this study revealed the basic properties and biochemical characteristics that allowed the production improvement of this class of enzyme. Moreover, with known properties stabilization and immobilization process is required to further explore its biotechnological capacities.
Descritores: Peptídeo Hidrolases/biossíntese
Aspergillus/enzimologia
Aminoácidos/administração & dosagem
-Arginina
Sefarose
Inibidores Enzimáticos
Responsável: BR1.1 - BIREME


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Id: biblio-1147195
Autor: Ahmed, Mohamed Morsi M; Khan, Md. Mohibul Alam; Al-Garni, Saleh M. S; Bora, Roop Singh; Kabli, Saleh A.
Título: Comparative molecular studies of halophilic bacteria from saline water and soil in the Saudi environment / Estudos moleculares comparativos de bactérias halofílicas de água salina e solo no meio ambiente saudita
Fonte: Biosci. j. (Online);36(3):1024-1031, 01-05-2020. tab, ilus.
Idioma: en.
Resumo: Halophilic bacteria are microorganisms that grow optimally in the presence of the very high concentration of sodium chloride. Halophiles are vital sources of various enzymes including hydrolases, which are very stable and catalytically highly efficient at high salt concentration and other extreme conditions such as high temperature, pH and presence of organic solvents. Several hydrolases such as amylases, proteases, and lipases have been obtained from halophilic bacteria and are commonly used for various industrial applications. We initiated a screening to isolate and characterize the halophilic bacteria from the Red Sea, which is one of the saltiest bodies of water in the world. Water and soil samples, collected from the Red Sea coast, Jeddah, Saudi Arabia, were screened for isolation of halophilic bacteria. Ten bacterial isolates were obtained, which were characterized by biochemical tests and 16S rRNA gene sequencing. Hydrolase producing bacteria among the isolates were screened by plate assay on starch and gelatin agar plates for amylase and protease, respectively. Two bacterial isolates i.e. Bacillus glycinifermentans S3 and Enterobacter cloacae W1were found to possess significant amylase and protease activity.

Bactérias halofílicas são microrganismos que crescem de maneira ideal na presença de uma concentração muito alta de cloreto de sódio. Halófilos são fontes vitais de várias enzimas, incluindo hidrolases, que são muito estáveis e cataliticamente altamente eficientes em alta concentração de sal e outras condições extremas, como alta temperatura, pH e presença de solventes orgânicos. Várias hidrolases como amilases, proteases e lipases foram obtidas a partir de bactérias halofílicas e são comumente usadas para várias aplicações industriais. Iniciamos uma triagem para isolar e caracterizar as bactérias halofílicas do Mar Vermelho, que é um dos corpos de água mais salgados do mundo. Amostras de água e solo, coletadas na costa do Mar Vermelho, Jeddah, na Arábia Saudita, foram examinadas quanto ao isolamento de bactérias halofílicas. Foram obtidos dez isolados bacterianos, caracterizados por testes bioquímicos e seqüenciamento do gene 16S rRNA. As bactérias produtoras de hidrolase entre os isolados foram triadas por ensaio em placa em placas de amido e ágar de gelatina para amilase e protease, respectivamente. Verificou-se que dois isolados bacterianos, isto é, Bacillus glycinifermentans S3 e Enterobacter cloacae W1, possuíam significativa atividade de amilase e protease.
Descritores: Peptídeo Hidrolases
Halobacteriales
Salinidade
Amilases
Hidrolases
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-1131496
Autor: Diana, T. F; Pinheiro, S. R. F; Dalólio, F. S; Dourado, L. R. B; Santos, A. S; Bonafé, C. M; Valentim, J. K.
Título: Protease em dietas com baixa proteína contendo farinha de Penas para codornas de corte / [Protease in low-protein diets for meat-type quails containing feather meal]
Fonte: Arq. bras. med. vet. zootec. (Online);72(4):1487-1496, July-Aug. 2020. tab.
Idioma: pt.
Projeto: Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior.
Resumo: Objetivou-se avaliar a suplementação de protease em dietas com baixa proteína contendo farinha de penas (FP) sobre o desempenho e o rendimento de carcaça de codornas de corte. Foram utilizadas 240 codornas, machos, distribuídas em delineamento inteiramente ao acaso, em esquema fatorial 2x 3 (com e sem protease x 3 níveis de FP (0%, 5% e 10%)), totalizando seis tratamentos (dieta reduzida (DR) em 8% da exigência de proteína bruta e aminoácidos + 0% FP; DR + 5% FP; DR + 10% FP; DR + 0% FP + protease; DR + 5% FP + protease e DR + 10% FP + protease), quatro repetições de 10 codornas por parcela, nas fases de oito-21 dias e oito-35 dias de idade. Observou-se interação (P≤0,05) entre os níveis de FP e protease no ganho de peso de oito-21 dias. Os níveis de FP influenciaram (P≤0,05) o consumo de ração e o ganho de peso de oito-21 e oito-35 e a conversão alimentar de oito-21 dias. Verificou-se interação (P≤0,05) entre aprotease e a inclusão de FPpara o peso corporalaos 35 dias. Conclui-se que aFP pode ser utilizada em até 5% em dietas para codornas de corte semsuplementação comprotease.(AU)

The objective of this study was to evaluate protease supplementation in low-protein diets containing feather meal (FP) on the performance and carcass yield of meat-type quails. Twenty male quails were used in a completely randomized design, in a 2 x 3 factorial scheme (with and without protease x 3 FP levels (0, 5 and 10%)), totaling six treatments (Reduced diet (RD) in 8 % of the requirement of crude protein and amino acids + 0% FP; RD + 5% FP; RD + 10% FP; RD + 0% FP + protease; RD + 5% FP + protease and RD + 10% FP + protease), four replicates of 10 quails per plot, in the phases of 8-21 days and 8-35 days of age. Interaction (P≤0.05) was observed between FP and protease levels on weight gain over the period of 8-21 days. The levels of FP influenced (P≤0.05) the feed intake and the weight gain of 8-21 and 8-35 and the feed conversion ratio of 8-21 days. There was interaction (P≤0.05) between protease supplementation and FP inclusion for body weight at 35 days. It is concluded that FP can be used up to 5% in diets for meat-type quails without protease supplementation.(AU)
Descritores: Peptídeo Hidrolases/administração & dosagem
Dieta com Restrição de Proteínas/veterinária
Coturnix/metabolismo
Plumas
Aminoácidos Sulfúricos/administração & dosagem
Limites: Animais
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-1052027
Autor: Delgado-García, Mariana; Flores-Gallegos, Adriana C; Kirchmayr, Manuel; Rodríguez, Jorge A; Mateos-Díaz, Juan C; Aguilar, Cristobal N; Muller, Marcelo; Camacho-Ruíz, Rosa M.
Título: Bioprospection of proteases from Halobacillus andaensis for bioactive peptide production from fish muscle protein
Fonte: Electron. j. biotechnol;39:52-60, may. 2019. ilus, tab, graf.
Idioma: en.
Resumo: BACKGROUND: Biologically active peptides produced from fish wastes are gaining attention because their health benefits. Proteases produced by halophilic microorganisms are considered as a source of active enzymes in high salt systems like fish residues. Hence, the aim of this study was the bioprospection of halophilic microorganisms for the production of proteases to prove their application for peptide production. RESULTS: Halophilic microorganisms were isolated from saline soils of Mexico and Bolivia. An enzymatic screening was carried out for the detection of lipases, esterases, pHB depolymerases, chitinases, and proteases. Most of the strains were able to produce lipases, esterases, and proteases, and larger hydrolysis halos were detected for protease activity. Halobacillus andaensis was selected to be studied for proteolytic activity production; the microorganism was able to grow on gelatin, yeast extract, skim milk, casein, peptone, fish muscle (Cyprinus carpio), and soy flour as protein sources, and among these sources, fish muscle protein was the best inducer of proteolytic activity, achieving a protease production of 571 U/mL. The extracellular protease was active at 50°C, pH 8, and 1.4 M NaCl and was inhibited by phenylmethylsulfonyl fluoride. The proteolytic activity of H. andaensis was used to hydrolyze fish muscle protein for peptide production. The peptides obtained showed a MW of 5.3 kDa and a radical scavenging ability of 10 to 30% on 2,2-diphenyl-1-picrylhydrazyl and 2,2-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) and a ferric reducing ability of plasma. Conclusion: The use of noncommercial extracellular protease produced by H. andaensis for biologically active peptide production using fish muscle as the protein source presents a great opportunity for high-value peptide production.
Descritores: Peptídeo Hidrolases/metabolismo
Peptídeos/metabolismo
Proteínas de Peixes/metabolismo
Halobacillus/enzimologia
-Solo
Bactérias/isolamento & purificação
Bolívia
Esterases
Salinidade
Hidrólise
Lipase
México
Proteínas Musculares
Antioxidantes
Responsável: CL1.1 - Biblioteca Central



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