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Ten compounds were isolated from the rhizomes of Paris axialis H. Li (PA). Based on spectral data, the isolated compounds were identified as Diosgenin (1), Paris saponin V (2), Paris saponin VI (3), Paris saponin I 4), P...

Ethanol and dichloromethane extracts from the marine sponge Iotrochota birotulata collected in the Urabá Gulf (Colombia) were tested against three human tumor cellular lines, including lung (A- 549), colon (HT29) and ...

Intact ribonucleic acid (RNA) has been prepared from tissues rich in ribonuclease such as the rat pancreas by efficient homogenization in a 4 M solution of the potent protein denaturant guanidinium thiocyanate plus 0.1 M...

A method is presented for the rapid isolation of high molecular weight plant DNA (50,000 base pairs or more in length) which is free of contaminants which interfere with complete digestion by restriction endonucleases. T...

Materias / palabras clave: Isolation (microbiology); Simple (philosophy); Chemistry; Chromatography; Biology; Biochemistry; Microbiology; Epistemology; Philosophy

Materias / palabras clave: DNA; Isolation (microbiology); RNA; Biochemistry; Biology; Homologous chromosome; Chemistry; Chromatography; Computational biology; Microbiology; Gene

Materias / palabras clave: RNA extraction; Chloroform; Extraction (chemistry); Phenol; Chemistry; RNA; Thiocyanate; Chromatography; Isolation (microbiology); Phenol extraction; Yield (engineering); Biochemistry

Materias / palabras clave: RNA extraction; Chloroform; Phenol; Extraction (chemistry); Chemistry; Thiocyanate; Chromatography; RNA; Isolation (microbiology); Phenol extraction; Yield (engineering); Biochemistry

The purpose of this study was to obtain information on the photochemical properties of ketoconazole, an antifungal agent. Photodegradation of ketoconazole in solution and shampoo under exposure to UV-C (254 nm) and UV-A ...

People with intellectual disabilities remain among the mostvulnerable members of society and often face many barriersto healthcare. They experience major health problems andrisks yet pay a ´disability penalty´, the res...

Infections caused by Carbapenem-resistant Acinetobacter baumannii (CRAB) isolates, such as hospital-acquired pneumonia (HAP), bacteremia, and skin and soft tissue infections, among others, are particularly challenging to...

Objective. To analyze the results of a stool work-up protocolin a series of infants and preschoolers with acute diarrhea.Material and Methods. A cross-sectional descriptive studywas conducted between April 1999 and March...

In an attempt to identify new antimicrobial compounds with potential to be used as a bactericidal/ fungicidal agent, a biomonitored study of extracts of Alternanthera brasiliana, which is used in Brazilian folk medicin...

Fractionation of the ethyl acetate soluble fraction from the ethanol extract of the leaves of Scutia buxifolia (Rhamnaceae) led to the isolation of quercetin, quercetin 3-0-rhamnoside (quercitrin), quercetin 3-0-glucosid...

This paper outlines and deals with the problem of fault detection, isolation and identification of the four-elements detector system attached to the Cairo Fourier diffractometer facility (CFDF) used for neutron time-of-f...

Este trabajo presenta un estudio comparativo de la eficacia de diferentes adsorbentes cromatográficos en el aislamiento del illustrol, un compuesto bioactivo con estructura de tipo nor-pregnano, a partir del extracto ...

El ciclo reproductor de hembras de Tupinambis merianae criadas en ambiente templado consiste de tres fases gonadales: previtelogénica, vitelogénica y postovulatoria o lútea. Durante la fase previtelogénica, que ocupa...

Se ha aislado una nueva endopeptidasa a partir de frutos inmaduros de Bromelia hieronymi Mez (Bromeliaceae). Los extractos crudos fueron parcialmente purificados por fraccionamiento con solventes orgánicos, habiéndose ...

En los últimos años se ha incrementado considerablemente el interés medicinal en las imidas cíclicas. Desde el aislamiento de la filantimida, un nuevo alcaloide presente en Phyllantus sellowianus, que posee moderadas...

Investigation of the bioactive crude extracts from the leaves of Erythrina speciosa Andr. (Leguminosae-Papilionoideae) from Brazil led to the isolation of nororientaline as a new alkaloid in this plant. The activity of c...

El presente trabajo describe el aislamiento de dos componentes de hojas y corteza de Aleurites moluccana, una planta medicinal ampliamente empleada en medicina popular para el tratamiento de varias dolencias. Sobre la b...

Este trabajo presenta un estudio comparativo de la eficacia de diversos adsorbentes cromatográficos en el aislamiento de cantin-6-one y 4 metoxicantin-6-one, dos alcaloides bioactivos aislados del extracto diclorometán...

Un nuevo aminoácido del tipo no proteico, el ácido 1-amino-3-metilciclobutano carboxílico, fue aislado de las semillas de Ateleia glazioviana Baill. extraídas con etanol 50%. El extracto alcohólico, después de ser ...

This paper presents a critique of expected utility theory as a descriptive model of decision making under risk, and develops an alternative model, called prospect theory. Choices among risky prospects exhibit several per...