Results: 3070

Determinación y comparación de propiedades físico-químicas de dos aceites de pino (Pinus oocarpa schiede) extraídos mediante las técnicas de soxhlet y clevenger

El aceite de pino es una mezcla de monoterpenos, hidrocarburos terpénicos y alcoholes terpénicos cíclicos derivados de la destilación de la madera de pino con aproximadamente un 57% de alfa-pineno como su principal componente. Es un líquido incoloro o ámbar claro con olor característico a pino. Pu...

Ensayo biodirigido del extracto etanólico del fruto Cocos nucìfera con actividad antioxidante

En Nicaragua el uso de plantas medicinales es una práctica muy común ya que constituye los diferentes elementos fitoterapéuticos disponibles a nuestro alcance para subsanar enfermedades comunes como no comunes; se han encontrado plantas que poseen un amplio campo de propiedades curativas por lo que pe...

Evaluación de la calidad en los extractos de Zingiber officinale, Passiflora incarnata, Petiveria alliacea L, comercializadas en farmacias herbolarias de León, mediante la utilización de métodos biológicos

El presente estudio trata de evaluar la calidad de los extractos de Zingiber officinale, Passiflora incarnata, Petiveria alliacea L, comercializados en farmacias herbolarias de la ciudad de León mediante la utilización de métodos biológicos de octubre 2013 a junio 2014, asi como, también determinar...

Evaluación fitoquímica y actividad antimicrobiana de tessaria integrifolia, recurso medicinal del Perú

La leishmaniasis cutánea o “uta” es una enfermedad producida por Leishmania peruviana y transmitida en la picadura de diversas especies de mosquitos del género Lutzomyia; su terapia se basa en el uso de fármacos antimoniales pentavalentes como el estibogluconato de sodio y antimoniato de meglumine...

Formulation of gastroretentive floating drug delivery system using hydrophilic polymers and its in vitro characterization

Braz. j. pharm. sci; 50 (2), 2014
The aim of the present research is to formulate and evaluate the gastroretentive floating drug delivery system of antihypertensive drug, propranolol HCl. Gastroretentive floating tablets (GRFT) were prepared by using a synthetic hydrophilic polymer polyethylene oxide of different grades such as PEO WSR N...

Immune enhancement activities of silk lutein extract from Bombyx mori cocoons

Biol. Res; 47 (), 2014
BACKGROUND: Declining immune function poses an important clinical challenge worldwide and supplementation with natural products that possessing immune enhancing properties is a promising approach for preventing or delaying immune function decline. Cocoons from yellow silkworms are a significant source of...

Physiological and biochemical characterization of egg extract of black widow spiders to uncover molecular basis of egg toxicity

Biol. Res; 47 (), 2014
BACKGROUND: Black widow spider (L. tredecimguttatus) has toxic components not only in the venomous glands, but also in other parts of the body and its eggs. It is biologically important to investigate the molecular basis of the egg toxicity. RESULTS: In the present work, an aqueous extract was prepared f...

The structure of selective dinucleotide interactions and periodicities in D melanogaster mtDNA

Biol. Res; 47 (), 2014
BACKGROUND: We found a strong selective 3-sites periodicity of deviations from randomness of the dinucleotide (DN) distribution, where both bases of DN were separated by 1, 2, K sites in prokaryotes and mtDNA. Three main aspects are studied. I) the specific 3 K-sites periodic structure of the 16 DN. II) ...

Effect of chlorocholine chlorid on phenolic acids accumulation and polyphenols formation of buckwheat plants

Biol. Res; 47 (), 2014
BACKGROUND: Effect of chlorocholine chloride (CCC) on phenolic acids composition and polyphenols accumulation in various anatomical parts (stems, leaves and inflorescences) of common buckwheat (Fagopyrum esculentum Moench) in the early stages of vegetation period were surveyed. RESULTS: Treatment of buck...

Methanol extract from Vietnamese Caesalpinia sappan induces apoptosis in HeLa cells

Biol. Res; 47 (), 2014
BACKGROUND: This study evaluated the cytotoxic activity of extracts from Caesalpinia sappan heartwood against multiple cancer cell lines using an MTT cell viability assay. The cell death though induction of apoptosis was as indicated by DNA fragmentation and caspase-3 enzyme activation. RESULTS: A methan...