Results: 110

Role of pH on antioxidants production by Spirulina (Arthrospira) platensis

Braz. j. microbiol; 47 (2), 2016
Abstract Algae can tolerate a broad range of growing conditions but extreme conditions may lead to the generation of highly dangerous reactive oxygen species (ROS), which may cause the deterioration of cell metabolism and damage cellular components. The antioxidants produced by algae alleviate the harmfu...

Efecto del tiempo de almacenamiento sobre propiedades fisicoquímicas y antioxidantes de productos derivados del fruto agraz (Vaccinium meridionale Swartz)

Vitae (Medellín); 23 (3), 2016
Antecedentes: Agraz es una baya globosa, de color púrpura intenso cuando está madura. Posee alta capacidad antioxidante comparada con bayas del mismo género, atribuido al contenido de compuestos polifenólicos. Objetivo: Evaluar la composición, actividad antioxidante y algunos parámetros microbioló...

Evaluación cualitativa y cuantitativa de metabolitos secundarios en variedades de morera
Qualitative and quantitative evaluation of secondary metabolites in mulberry varieties

La morera, también conocida como mora blanca, es una planta ampliamente usada en diversos campos (medicina, alimento, etc), esto debido a su composición fitoquímica. En este trabajo se realizó un estudio de los metabolitos secundarios de la Morus alba y determinar comparativamente 4 variedades de est...

Evaluación de fenoles y limonoides en hojas de Cedrela odorata (Meliaceae) de una plantación experimental establecida en Tezonapa Veracruz, México

Rev. biol. trop; 63 (2), 2015
Cedrela odorata (Meliaceae) is a native timber tree to Tropical America, known for its high-quality wood, unfortunately, plantations of this species are severely attacked by Hypsipyla grandella. The attraction or repellency of this pest is related to secondary metabolites such as phenols and limonoids (t...

Evaluación de la actividad antioxidante y determinación del contenido de fenoles totales y flavonoides de hojas de diferentes genotipos de Ugni molinae Turcz

Ugni molinae, Myrtaceae, es un arbusto silvestre que crece en el sur de Chile, especialmente en la cordillera de la Costa y parte de la precordillera andina. La planta produce frutos globosos y pequeños, de agradable sabor y aroma, y las infusiones de sus hojas han sido utilizadas por la medicina folcl...

In vitro antioxidant capacity and free radical scavenging evaluation of active metabolite constituents of Newbouldia laevis ethanolic leaf extract

Biol. Res; 48 (), 2015
BACKGROUND: The aim of the present study was to evaluate the in vitro antioxidant and free radical scavenging capacity of bioactive metabolites present in Newbouldia laevis leaf extract. RESULTS: Chromatographic and spectrophotometric methods were used in the study and modified where necessary in the stu...

Anticholinesterse and antioxidant investigations of crude extracts, subsequent fractions, saponins and flavonoids of atriplex laciniata L: potential effectiveness in Alzheimer's and other neurological disorders

Biol. Res; 48 (), 2015
BACKGROUND: Atriplex laciniata L. was investigated for phenolic, flavonoid contents, antioxidant, anticholinesterase activities, in an attempt to explore its effectiveness in Alzheimer's and other neurological disorders. Plant crude methanolic extract (Al.MeF), subsequent fractions; n-hexane (Al.HxF), ch...

Comparison of different methods for total RNA extraction from sclerotia of Rhizoctonia solani

Electron. j. biotechnol; 17 (1), 2014
Background Rhizoctonia solani (teleomorph: Thanatephorus cucumeris) is one of the most important pathogens of rice (Oryza sativa L.) that causes severe yield losses in all rice-growing regions. Sclerotia, formed from the aggregation of hyphae, are important structures in the life cycles of R. solani and ...

Compositional studies and biological activities of some mash bean (Vigna mungo (L) Hepper) cultivars commonly consumed in Pakistan

Biol. Res; 47 (), 2014
BACKGROUND: In recent years, the desire to adopt a healthy diet has drawn attention to legume seeds and food products derived from them. Mash bean is an important legume crop used in Pakistan however a systematic mapping of the chemical composition of mash bean seeds is lacking. Therefore seeds of four m...

Assessment of the phytochemical constituents and antioxidant activity of a bloom forming microalgae Euglena tuba

Biol. Res; 47 (), 2014
BACKGROUND: Unstable generation of free radicals in the body are responsible for many degenerative diseases. A bloom forming algae Euglena tuba growing abundantly in the aquatic habitats of Cachar district in the state of Assam in North-East India was analysed for its phytochemical contents, antioxidant ...