نتایج جستجو برای: column chromatography

تعداد نتایج: 168223  

H KALANTARI, ME MAKVANDI, PY DIGHE,

HBs vaccines were prepared by three different methods: 1) Heat inactivation (Krugman, et.al 1971)2) Ammonium sulphate precipitation followed by column chromatography (Sephadex G-200) 3) PEG-6000 (polyethylene glycol) precipitation followed by column chromatography using Sephadex G-200. Their efficacy was studied in guinea pigs, and the results compared with commercial Japanese vaccine (Gr...

2017
NICOLE RIDDELL Nicole Riddell

Nicole Riddell (2017): Packed Column Supercritical Fluid Chromatography: Applications in Environmental Chemistry. Örebro Studies in Chemistry 19. Although gas and liquid chromatography have emerged as dominant separation techniques in environmental analytical chemistry, these methods do not allow for the concurrent analysis of chemically diverse groups of persistent organic pollutants (POPs). T...

Journal: :Journal of Chemical Education 1974

Journal: :Journal of Research of the National Institute of Standards and Technology 2017

Journal: :iranian journal of pharmaceutical sciences 0
marzieh matin yekta iau pharmaceutical sciences branch and department of pharmacognosy, institute of medicinal plants, acecr, tehran, iran seyed hamid reza alavi iau pharmaceutical sciences branch and department of pharmacognosy, institute of medicinal plants, acecr, tehran, iran

from hexanic extract of aerial parts of peucedanum ruthenicum m. bieb (apiaceae) collected from mazandaran province of iran, four triterpenoids namely taraxasterol, y-taraxasterol, poriferasterol and b-sitosterol have been isolated by column chromatography, thin layer chromatography, and crystallization. their structures were elucidated by spectroscopic methods (uv, ir, ms, 1h and 13c-nmr).

Journal: :research journal of pharmacognosy 0
m. babashpour-asl department of horticultural sciences, university campus 2, university of guilan, rasht, iran. research center for pharmaceutical nanotechnology, faculty of pharmacy, tabriz university of medical sciences, tabriz, iran. h. nazemiyeh research center for pharmaceutical nanotechnology, faculty of pharmacy, tabriz university of medical sciences, tabriz, iran. h. zakizadeh department of horticultural sciences, university campus 2, university of guilan, rasht, iran. a. motallebi-azar department of horticultural sciences, faculty of agriculture, tabriz university, tabriz, iran.

background and objectives: many members of the amaryllidaceae are regarded as toxic. the toxic constituents that occur in the whole family are referred to as the amaryllidaceae alkaloids. the main aim of this study was the identification of alkaloid compounds from galanthus transcaucasicus fomin, a medicinal plant from amaryllidaceae. methods: planar and column chromatography techniques were us...

Abolfazl Farahani Farzad Khajavi Parvin Baghai Ravanbakhsh Shirdam,

The aim of this research is to develop a silica gel and alumina column chromatography for separation of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) into two groups. This is achieved by optimizing the cut-off volume of eluting solvent and weight ratio of silica gel and alumina. In this process mixture of PAHs and PCBs divide in two groups and simultaneously o...

A. Motallebi-Azar H. Nazemiyeh H. Zakizadeh M. Babashpour-Asl

Background and objectives: Many members of the Amaryllidaceae are regarded as toxic. The toxic constituents that occur in the whole family are referred to as the Amaryllidaceae alkaloids. The main aim of this study was the identification of alkaloid compounds from Galanthus transcaucasicus Fomin, a medicinal plant from Amaryllidaceae. Methods: Planar a...

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