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Pesquisa : D08.811.277.450.410.100 [Categoria DeCS]
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Id: lil-731304
Autor: Santos, Osmara Alves dos; Borges, Ana Luiza Vilela; Chofakian, Christiane Borges do Nascimento; Pirotta, Kátia Cibelle Machado.
Título: Determinants of emergency contraception non-use among women in unplanned or ambivalent pregnancies / Determinantes del no uso de la anticoncepción de emergencia entre mujeres con embarazo no planeado u ambivalente / Determinantes do não uso da anticoncepção de emergência entre mulheres com gravidez não planejada ou ambivalente
Fonte: Rev. Esc. Enferm. USP;48(spe):16-22, 08/2014. tab.
Idioma: en.
Projeto: CNPq.
Resumo: Objective To analyze the determinants of emergency contraception non-use among women in unplanned and ambivalent pregnancies. Method Cross-sectional study with a probabilistic sample of 366 pregnant women from 12 primary health care units in the city of São Paulo, Brazil. A multinomial logistic regression was performed, comparing three groups: women who used emergency contraception to prevent ongoing pregnancies (reference); women who made no use of emergency contraception, but used other contraceptive methods; and women who made no use of any contraceptive methods at all. Results Cohabitation with a partner was the common determinant of emergency contraception non-use. No pregnancy risk awareness, ambivalent pregnancies and no previous use of emergency contraception also contributed to emergency contraception non-use. Conclusion Apart from what is pointed out in the literature, knowledge of emergency contraception and the fertile period were not associated to its use. .

Objetivo Analizar los determinantes del no uso de la anticoncepción de emergencia entre las mujeres con embarazo no planeado o ambivalente. Método Estudio transversal en una muestra probabilística de 366 mujeres embarazadas de 12 Unidades Básicas de Salud de São Paulo. Mediante regresión logística multinomial, se comparó tres grupos de mujeres: aquellas que usaron la anticoncepción de emergencia para prevenir el embarazo en curso (referencia), aquellas que usaron algún método anticonceptivo, pero no la anticoncepción de emergência; y aquellas que no usaron ningún método. Resultados Los hallazgos mostraron que vivir com la pareja fue el determinante común del no uso de la anticoncepción de emergencia. No tener conciencia del riesgo de embarazo, estar en un embarazo ambivalente y nunca tener utilizado la anticoncepción de emergencia también fueron associados con su no uso para prevenir el embarazo en curso. Conclusión Contrariamente a lo que reporta la literatura, el conocimiento de la anticoncepción de emergencia y el período fértil no mostró asociación con el no uso. .

Objetivo Analisar os determinantes do não uso da anticoncepção de emergência entre mulheres com gravidez não planejada ou ambivalente. Método Estudo transversal com amostra probabilística de 366 gestantes de 12 Unidades Básicas de Saúde da cidade de São Paulo. Por meio de regressão logística multinomial, compararam-se três grupos de mulheres: as que usaram anticoncepção de emergência para prevenir a gravidez em curso (referência); as que usaram algum método contraceptivo, mas não anticoncepção de emergência; e as que não usaram nenhum método. Resultados Os achados mostraram que morar com o parceiro foi o determinante comum do não uso da anticoncepção de emergência. Não ter consciência do risco de engravidar, estar em uma gravidez ambivalente e nunca ter usado anticoncepção de emergência também foram associados ao seu não uso para prevenir a gravidez em curso. Conclusão Diferentemente do que relata a literatura, o conhecimento sobre anticoncepção de emergência e sobre o período fértil não mostrou qualquer associação ao não uso. .
Descritores: Proteínas de Ligação a DNA
Escherichia coli/genética
Mapeamento de Interação de Proteínas/métodos
Técnicas do Sistema de Duplo-Híbrido
-Bacteriófago lambda/genética
DNA Bacteriano/genética
RNA Polimerases Dirigidas por DNA/biossíntese
RNA Polimerases Dirigidas por DNA/genética
RNA Polimerases Dirigidas por DNA/fisiologia
Proteínas de Escherichia coli/biossíntese
Proteínas de Escherichia coli/genética
Proteínas de Escherichia coli/fisiologia
Escherichia coli/enzimologia
Genes Reporter/genética
Fosforilação
Plasmídeos/biossíntese
Plasmídeos/genética
Regiões Promotoras Genéticas/genética
RNA Bacteriano/genética
Proteínas Recombinantes de Fusão/biossíntese
Proteínas Recombinantes de Fusão/genética
Proteínas Recombinantes de Fusão/fisiologia
Proteínas Repressoras/biossíntese
Proteínas Repressoras/genética
Proteínas Repressoras/fisiologia
Transcrição Genética/genética
Transcrição Genética/fisiologia
Proteínas Virais/biossíntese
Proteínas Virais/genética
Proteínas Virais/fisiologia
Proteínas Virais Reguladoras e Acessórias
beta-Galactosidase/biossíntese
beta-Lactamases/biossíntese
Responsável: BR1.1 - BIREME


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Angelo, Margareth
Texto completo
Id: lil-731303
Autor: Angelo, Margareth; Cruz, Andréia Cascaes; Mekitarian, Francine Fernandes Pires; Santos, Carolina Cavalcante da Silva dos; Martinho, Maria Júlia Costa Marques; Martins, Maria Manuela Ferreira Pereira da Silva.
Título: Nurses’ attitudes regarding the importance of families in pediatric nursing care / Actitudes de enfermeras sobre la importancia de las familias en los cuidados de enfermería en pediatría / Atitudes de enfermeiros em face da importância das famílias nos cuidados de enfermagem em pediatria
Fonte: Rev. Esc. Enferm. USP;48(spe):74-79, 08/2014. tab.
Idioma: en.
Resumo: Affective, cognitive and behavioral components affect nurses´ attitudes to include families in the care processes. The purpose of this study was to investigate the attitudes of nurses about the importance of including families in nursing care. Data collection was performed in pediatric and maternal-child unit of a Brazilian university hospital. A sample of 50 nurses completed the Portuguese version of the instrument Families’Importance in Nursing Care-Nurses’ Attitudes (FINC-NA). The results indicated that nurses have supportive attitudes regarding families participation in nursing care. Attitudes of lower support for involving families in nursing care were found among nurses with older age, more time in the profession and who had no previous contact with contents related to Family Nursing. The application of the instrument in other contexts of assistance may help to illuminate important aspects of the challenges to implementing a family-centered approach in clinical practice.



.

El propósito de este estudio fue identificar las actitudes de los enfermeros sobre la importancia de incluir a las familias en el cuidado de enfermería. La recolección de datos se llevó a cabo en las unidades de pediatría y materno-infantil de un hospital universitario brasileño. Una muestra de 50 enfermeras completó la versión en portugués del el instrumento Families’ Importance in Nursing Care-Nurses’ Attitudes (FINC-NA). Los resultados indicaron las puntuaciones más altas en dimensiones indicativas de actitudes de apoyo a la participación de las familias en el cuidado. Enfermeras con más tiempo en la profesión y que no tenían conocimiento previo de enfermería de familia tuvieron puntuaciones que indican actitudes de menor apoyo para involucrar a las familias en el cuidado de enfermería. La aplicación de este instrumento en otro tipo de asistencia contextos puede ayudar a iluminar aspectos importantes de los desafíos para la implementación de un enfoque centrado en la familia, en la práctica clínica.
.

Objetivo Identificar as atitudes dos enfermeiros sobre a importância de incluir as famílias nos cuidados de enfermagem. Método Estudo de abordagem quantitativa descritiva, cuja coleta de dados foi realizada em unidades de pediatria e materno-infantil de um hospital universitário brasileiro. Uma amostra de 50 enfermeiros completou a versão em português da escala Families Importance in Nursing Care-Nurses Attitudes (FINC-NA). Resultados Indicaram escores mais elevados em dimensões indicativas de atitudes de apoio sobre a participação das famílias no cuidado de enfermagem. Enfermeiros com mais tempo na profissão e que não tiveram conhecimento prévio de enfermagem da família apresentaram escores indicativos de atitudes de menor apoio para envolver as famílias no cuidado de enfermagem. Conclusão A aplicação desse instrumento em outros contextos de assistência poderá contribuir para iluminar importantes aspectos relacionados aos desafios para a implementação de uma abordagem centrada na família na prática clínica e subsidiar o desenvolvimento de pesquisas mais amplas.
 .
Descritores: Azoarcus/metabolismo
Coenzima A Ligases/genética
Fenilacetatos/metabolismo
-Aerobiose
Azoarcus/genética
Coenzima A Ligases/metabolismo
Immunoblotting
Mutação
Proteínas Recombinantes de Fusão/genética
Análise de Sequência de DNA
beta-Galactosidase/genética
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: biblio-1053493
Autor: Gao, Ling; Guo, Qingqing; Lin, Huibin; Pan, Deng; Huang, Xiaodong; Lin, Jianqun; Lin, Jianqiang.
Título: Modeling of lactose enzymatic hydrolysis using Monte Carlo method
Fonte: Electron. j. biotechnol;40:78-83, July. 2019. tab, graf, ilus.
Idioma: en.
Projeto: Taishan Industry Leading Talents Engineering for High-Efficiency Ecoagriculture Innovation project of Shandong province, China; . National Natural Science Foundation of China.
Resumo: Background: Mathematical modeling is useful in the analysis, prediction, and optimization of an enzymatic process. Unlike the conventional modeling methods, Monte Carlo method has special advantages in providing representations of the molecule's spatial distribution. However, thus far, Monte Carlo modeling of enzymatic system is namely based on unimolecular basis, not suitable for practical applications. In this research, Monte Carlo modeling is performed for enzymatic hydrolysis of lactose for the purpose of real-time applications. Results: The enzyme hydrolysis of lactose, which is conformed to Michaelis­Menten kinetics, is modeled using the Monte Carlo modeling method, and the simulation results prove that the model predicts the reaction kinetics very well. Conclusions: Monte Carlo modeling method can be used to model enzymatic reactions in a simple way for real-time applications.
Descritores: Método de Monte Carlo
Enzimas/metabolismo
Hidrólise
Lactose/metabolismo
-Fatores de Tempo
Cinética
beta-Galactosidase/metabolismo
Enzimas Imobilizadas
Galactose/metabolismo
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1010283
Autor: Niu, Dandan; Tian, Xiaojing; Peace Mchunu, Nokuthula; Jia, Chao; Singh, Suren; Liu, Xiaoguang; Prior, Bernard A; Lu, Fuping.
Título: Biochemical characterization of three Aspergillus niger ß-galactosidases
Fonte: Electron. j. biotechnol;27:37-43, May. 2017. tab, ilus, graf.
Idioma: en.
Projeto: National Natural Science Foundation of China; . National Natural Science Foundation of Fujian Province, China; . Priming Scientific Research Foundation of Fuzhou University.
Resumo: Background: ß-Galactosidases catalyze both hydrolytic and transgalactosylation reactions and therefore have many applications in food, medical, and biotechnological fields. Aspergillus niger has been a main source of ß-galactosidase, but the properties of this enzyme are incompletely studied. Results: Three new ß-galactosidases belonging to glycosyl hydrolase family 35 from A. niger F0215 were cloned, expressed, and biochemically characterized. In addition to the known activity of LacA encoded by lacA, three putative ß-galactosidases, designated as LacB, LacC, and LacE encoded by the genes lacB, lacC, and lacE, respectively, were successfully cloned, sequenced, and expressed and secreted by Pichia pastoris. These three proteins and LacA have N-terminal signal sequences and are therefore predicted to be extracellular enzymes. They have the typical structure of fungal ß-galactosidases with defined hydrolytic and transgalactosylation activities on lactose. However, their activity properties differed. In particular, LacB and lacE displayed maximum hydrolytic activity at pH 4­5 and 50°C, while LacC exhibited maximum activity at pH 3.5 and 60°C. All ß-galactosidases performed transgalactosylation activity optimally in an acidic environment. Conclusions: Three new ß-galactosidases belonging to glycosyl hydrolase family 35 from A. niger F0215 were cloned and biochemically characterized. In addition to the known LacA, A. niger has at least three ß-galactosidase family members with remarkably different biochemical properties.
Descritores: Aspergillus niger/enzimologia
beta-Galactosidase/química
-Especificidade por Substrato
Cinética
Sequência de Aminoácidos
Clonagem Molecular
beta-Galactosidase/genética
beta-Galactosidase/metabolismo
Responsável: CL1.1 - Biblioteca Central


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Texto completo SciELO Brasil
Texto completo
Id: lil-727016
Autor: Pérez, Edmundo A.; Fernández, Francisco J.; Fierro, Francisco; Mejía, Armando; Marcos, Ana T.; Martín, Juan F.; Barrios-González, Javier.
Título: Yeast HXK2 gene reverts glucose regulation mutation of penicillin biosynthesis in P. chrysogenum
Fonte: Braz. j. microbiol;45(3):873-883, July-Sept. 2014. ilus, graf, tab.
Idioma: en.
Resumo: The mutant Penicillium chrysogenum strain dogR5, derived from strain AS-P-78, does not respond to glucose regulation of penicillin biosynthesis and β-galactosidase, and is partially deficient in D-glucose phosphorilating activity. We have transformed strain dogR5 with the (hexokinase) hxk2 gene from Saccharomyces cerevisiae. Transformants recovered glucose control of penicillin biosynthesis in different degrees, and acquired a hexokinase (fructose phosphorylating) activity absent in strains AS- P-78 and dogR5. Interestingly, they also recovered glucose regulation of β-galactosidase. On the other hand, glucokinase activity was affected in different ways in the transformants; one of which showed a lower activity than the parental dogR5, but normal glucose regulation of penicillin biosynthesis. Our results show that Penicillium chrysogenum AS-P-78 and dogR5 strains lack hexokinase, and suggest that an enzyme with glucokinase activity is involved in glucose regulation of penicillin biosynthesis and β-galactosidase, thus signaling glucose in both primary and secondary metabolism; however, catalytic and signaling activities seem to be independent.
Descritores: Regulação Fúngica da Expressão Gênica/efeitos dos fármacos
Glucose/metabolismo
Hexoquinase/metabolismo
Penicilinas/biossíntese
Penicillium chrysogenum/genética
Penicillium chrysogenum/metabolismo
Proteínas de Saccharomyces cerevisiae/metabolismo
-Hexoquinase/genética
Proteínas Recombinantes/genética
Proteínas Recombinantes/metabolismo
Proteínas de Saccharomyces cerevisiae/genética
Transformação Genética
beta-Galactosidase/biossíntese
Responsável: BR1.1 - BIREME


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Texto completo
Id: lil-723123
Autor: Solanki, Manu; Garg, Faquir C..
Título: The use of lacZ marker in enumeration of Azotobacter chroococcum in carrier based inoculants
Fonte: Braz. j. microbiol;45(2):595-601, Apr.-June 2014. tab.
Idioma: en.
Resumo: A transconjugant of Azotobacter chroococcum Mac 27 tagged with lac Z(A. chroococcum Mac27 L) was found to possess high levels of β-galactosidase activity constitutively.Further, the lac Z marker was found to be stably integrated into the chromosome of the A. chroococcum Mac 27 and did not have any adverse effect on growth, nitrogen fixation and excretion of ammonia. A quick method to determine the viable cell number in broth culture and carrier based inoculants has been developed on the basis of β-galactosidase assay. It was found that there was a direct relationship between the number of cell as determined by standard plate count and intensity of colour that developed upon degradation of ONPG due to β-galactosidase activity .The method was found to be sensitive enough to determine 1.7 x 10(6) CFU mL-1 in broth culture as well as carrier based Azotobacter inoculants. Further, it was observed that when A. chroococcum Mac27 L was inoculated on Brassica campestris, it could be detected in the presence of other bacteria capable of growing on Burks agar medium containing X-gal on the basis of lac Z genetic marker.
Descritores: Azotobacter/isolamento & purificação
Carga Bacteriana/métodos
Genes Reporter
beta-Galactosidase/análise
-Brassica rapa/microbiologia
Sensibilidade e Especificidade
beta-Galactosidase/genética
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Texto completo SciELO Cuba
Texto completo
Id: lil-709199
Autor: Hernández García, Iván; Seiglie Díaz, Frances; Campos Hernández, Derbis; Marrón Portarles, Lourdes; Díaz González, Jorge Luís; Carmona Padrón, Orlando.
Título: Gangliosidosis generalizada tipo 1 / Generalized gangliosidosis type 1
Fonte: Rev. cuba. pediatr;86(1):103-107, abr.-jun. 2014.
Idioma: es.
Resumo: La gangliosidosis generalizada tipo 1 es una enfermedad de acúmulo lisosomal producida por mutaciones en el gen de la enzima b-galactosidasa, caracterizada fundamentalmente por toma del sistema nervioso central, la visceromegalia, disostosis ósea y dimorfismo facial. Se presenta el caso de un lactante varón, hijo de padres no consanguíneos, de 5 meses de edad, Apgar 6/8 debido a hipoxia neonatal, con historia de múltiples ingresos por enfermedad diarreica e infecciones respiratorias. Es remitido a la Consulta de Genética Clínica por retardo del desarrollo psicomotor, macrocráneo y hepatomegalia, además de máculas hipercrómicas en piel. En el examen físico se encontraron evidencias de una posible afectación por enfermedad metabólica lisosomal. Entre las enfermedades a descartar estaban la galactosialidosis, de características clínicas similares, y la enfermedad de Morquio, con diferente presentación clínica pero idéntico defecto enzimático

Generalized or GM 1 gangliosidosis is a lysosomal storage disease caused by mutations in the enzyme b-galactosidase gene, mainly characterized by affecting the central nervous system, visceromegalia, osseous dysostosis and facial dimorphism. This is the case of a male nursling born to non-consanguineous parents, 5 months of age, Apgar index of 6/8 due to neonatal hypoxia, with a history of several admissions to hospital because of diarrheal disease and respiratory infections. He was referred to the clinical genetic service since he presented with retarded psychomotor development, macrocrania and hepatomegalia, in addition to hyperchromic skin spots. The physical exam found evidence of possible effects by lysosomal metabolic disease. Among the diseases to be ruled out for the diagnosis were galactosialidosis of similar clinical characteristics and Morquio B disease with different clinical presentation but identical enzymatic deficiency
Descritores: Doenças por Armazenamento dos Lisossomos/complicações
Gangliosidose GM1
beta-Galactosidase/genética
-Relatos de Casos
Limites: Humanos
Masculino
Lactente
Responsável: CU1.1 - Biblioteca Médica Nacional


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Texto completo SciELO Brasil
Texto completo
Id: lil-705252
Autor: Faria, Janaína T. de; Rocha, Pollyana F.; Converti, Attilio; Passos, Flávia M.L.; Minim, Luis A.; Sampaio, Fábio C..
Título: Statistical investigation of Kluyveromyces lactis cells permeabilization with ethanol by response surface methodology
Fonte: Braz. j. microbiol;44(4):1067-1074, Oct.-Dec. 2013. graf, tab.
Idioma: en.
Resumo: The aim of our study was to select the optimal operating conditions to permeabilize Kluyveromyces lactis cells using ethanol as a solvent as an alternative to cell disruption and extraction. Cell permeabilization was carried out by a non-mechanical method consisting of chemical treatment with ethanol, and the results were expressed as β-galactosidase activity. Experiments were conducted under different conditions of ethanol concentration, treatment time and temperature according to a central composite rotatable design (CCRD), and the collected results were then worked out by response surface methodology (RSM). Cell permeabilization was improved by an increase in ethanol concentration and simultaneous decreases in the incubation temperature and treatment time. Such an approach allowed us to identify an optimal range of the independent variables within which the β-galactosidase activity was optimized. A maximum permeabilization of 2,816 mmol L-1 oNP min-1 g-1 was obtained by treating cells with 75.0% v/v of ethanol at 20.0 °C for 15.0 min. The proposed methodology resulted to be effective and suited for K. lactis cells permeabilization at a lab-scale and promises to be of possible interest for future applications mainly in the food industry.
Descritores: Membrana Celular/efeitos dos fármacos
Etanol/toxicidade
Kluyveromyces/efeitos dos fármacos
Permeabilidade/efeitos dos fármacos
-Membrana Celular/fisiologia
Kluyveromyces/fisiologia
Modelos Estatísticos
Temperatura
Fatores de Tempo
beta-Galactosidase/análise
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Texto completo SciELO Brasil
Texto completo
Id: lil-659653
Autor: Sotomaior, P.; Araújo, L.M.; Nishikawa, C.Y.; Huergo, L.F.; Monteiro, R.A.; Pedrosa, F.O.; Chubatsu, L.S.; Souza, E.M..
Título: Effect of ATP and 2-oxoglutarate on the in vitro interaction between the NifA GAF domain and the GlnB protein of Azospirillum brasilense
Fonte: Braz. j. med. biol. res = Rev. bras. pesqui. méd. biol;45(12):1135-1140, Dec. 2012. ilus, tab.
Idioma: en.
Resumo: Azospirillum brasilense is a diazotroph that associates with important agricultural crops and thus has potential to be a nitrogen biofertilizer. The A. brasilense transcription regulator NifA, which seems to be constitutively expressed, activates the transcription of nitrogen fixation genes. It has been suggested that the nitrogen status-signaling protein GlnB regulates NifA activity by direct interaction with the NifA N-terminal GAF domain, preventing the inhibitory effect of this domain under conditions of nitrogen fixation. In the present study, we show that an N-terminal truncated form of NifA no longer required GlnB for activity and lost regulation by ammonium. On the other hand, in trans co-expression of the N-terminal GAF domain inhibited the N-truncated protein in response to fixed nitrogen levels. We also used pull-down assays to show in vitro interaction between the purified N-terminal GAF domain of NifA and the GlnB protein. The results showed that A. brasilense GlnB interacts directly with the NifA N-terminal domain and this interaction is dependent on the presence of ATP and 2-oxoglutarate.
Descritores: Trifosfato de Adenosina/metabolismo
Azospirillum brasilense/enzimologia
Proteínas de Bactérias/metabolismo
Ácidos Cetoglutáricos/metabolismo
Fatores de Transcrição/metabolismo
beta-Galactosidase/metabolismo
-Azospirillum brasilense/metabolismo
Vetores Genéticos
Plasmídeos
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Texto completo SciELO Chile
Texto completo
Id: lil-640526
Autor: Illanes, Andrés.
Título: Whey upgrading by enzyme biocatalysis
Fonte: Electron. j. biotechnol;14(6):9-9, Nov. 2011. ilus, tab.
Idioma: en.
Resumo: Whey is a co-product of processes for the production of cheese and casein that retains most of the lactose content in milk. World production of whey is estimated around 200 million tons per year with an increase rate of about 2 percent/per year. Milk production is seasonal, so surplus whey is unavoidable. Traditionally, whey producers have considered it as a nuisance and strategies of whey handling have been mostly oriented to their more convenient disposal. This vision has been steadily evolving because of the upgrading potential of whey major components (lactose and whey proteins), but also because of more stringent regulations of waste disposal. Only the big cheese manufacturing companies are in the position of implementing technologies for their recovery and upgrading, so there is a major challenge in incorporating medium and small size producers to a platform of whey utilization, conciliating industrial interest with environmental protection within the framework of sustainable development. Within this context, among the many technological options for whey upgrading, transformation of whey components by enzyme biocatalysis appears as prominent. In fact, enzymes are green catalysts that can perform a myriad of transformation reactions under mild conditions and with strict specificity, so reducing production costs and environmental burden. This review pretends to highlight the impact of biocatalysis within a platform of whey upgrading. Technological options are shortly reviewed and then an in-depth and critical appraisal of enzyme technologies for whey upgrading is presented, with a special focus on newly developed enzymatic processes of organic synthesis, where the added value is high, being then a powerful driving force for industrial implementation.
Descritores: Lactose
Leite/enzimologia
Oligossacarídeos/metabolismo
Prebióticos
beta-Galactosidase/metabolismo
-Biocatálise
Esterificação
Enzimas/metabolismo
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central



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