Results: 26

Enzymatic purification of glucomannan from Amorphophallus oncophyllus using α-Amylase

Biosci. j. (Online); 35 (1), 2019
The international standards for top glucomannan flour require a minimum of 70% glucomannan. The glucomannan content of Amorphophallus oncophyllus flour was approximately 60%, with starch as the major impurity. Elimination of starch was expected to increase the purity of...

Actividad de la α-amilasa en leche materna en los primeros 50 días postparto
Activity of the α-amylase in human milk in the first 50 days postpartum

Actual. nutr; 20 (1), 2019
Introducción: la α-amilasa es una enzima que tiene la capacidad de digerir uniones α (1,4). En la leche sus funciones son poco conocidas. Objetivos: determinar la actividad de la α-amilasa en el suero lácteo humano. Materiales y métodos: la medición se realizó con un kit comercial para determinac...

Molecular cloning and biochemical characterization of an α-amylase family from Aspergillus niger

Background: α-Amylase is widely used in the starch processing, food and paper industries, hydrolyzing starch, glycogen and other polysaccharides into glucose, maltose and oligosaccharides. An α-amylase gene family from Aspergillus niger CBS513.88 encode eight putative α-amylases. The differences and s...

Introduction of a synthetic Thermococcus-derived α-amlyase gene into barley genome for increased enzyme thermostability in grains

Background: The enzymes utilized in the process of beer production are generally sensitive to higher temperatures. About 60% of them are deactivated in drying the malt that limits the utilization of starting material in the fermentation process. Gene transfer from thermophilic bacteria is a promising too...

Evaluation of cytogenotoxicity, antioxidant and hypoglycemiant activities of isolate compounds from Mansoa hirsuta D.C. (Bignoniaceae)

An. acad. bras. ciênc; 89 (1), 2017
ABSTRACT Mansoa hirsuta (Bignoniaceae) is a native plant from caatinga in Brazilian semiarid. This plant has been locally used as antimicrobial and hypoglycemiant agents, but their action mechanisms and toxicity remain largely unknown. Therefore, we evaluated the composition and antioxidant, cytoprotecti...

Highly efficient enzymatic preparation of isomalto-oligosaccharides from starch using an enzyme cocktail

Background: Current commercial production of isomalto-oligosaccharides (IMOs) commonly involves a lengthy multistage process with low yields. Results: To improve the process efficiency for production of IMOs, we developed a simple and efficient method by using enzyme cocktails composed of the recombinant...

Salivary cortisol and alpha-amylase: subclinical indicators of stress as cardiometabolic risk

Braz. j. med. biol. res; 50 (2), 2017
Currently, the potential for cardiovascular (CV) stress-induced risk is primarily based on the theoretical (obvious) side effects of stress on the CV system. Salivary cortisol and α-amylase, produced respectively by the hypothalamus-pituitary-adrenal (HPA) axis and the sympathetic-adrenomedullary (S...

Salivary stress biomarkers and anxiety symptoms in children with and without temporomandibular disorders

Abstract The etiology of temporomandibular disorders (TMD), which are considered as a heterogeneous group of psychophysiological disturbances, remains a controversial issue in clinical dentistry. This study aimed to evaluate whether the salivary alpha-amylase (sAA), cortisol levels, and anxiety symptoms ...

Aqueous extract of Psidium guajava leaves: phenolic compounds and inhibitory potential on digestive enzymes

An. acad. bras. ciênc; 89 (3,supl), 2017
ABSTRACT Leaves of Psidium guajava L. (guava) have been widely used in the popular way for prevention and treatment of various diseases. Thus, the objective of this study was to evaluate the inhibitory potential of leaves aqueous extract from three cultivars of P. guajava (Pedro Sato, Paluma and Século ...

Determinação da energia metabolizável do farelo residual do milho com e sem enzima em dietas para frangos de corte

O objetivo deste trabalho foi avaliar o valor nutricional e determinar a energia metabolizável do farelo residual de milho (FRM) sem e com o uso da enzima alfa- amilase. Foi realizado um experimento de metabolismo com 180 pintos machos Cobb com 14 dias, distribuídos em um delineamento inteiramente ao a...