نتایج جستجو برای: flash chromatography

تعداد نتایج: 124038  

Journal: :Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes 2008
Kelber Miranda Marcelo L F Cunha Eliana F G C Dores Debora F Calheiros

Sediment samples from 25 sites in 17 rivers of the Pantanal (Brazil) were analyzed with the objective of evaluating pesticide contamination in sediments. Samples were extracted with an acetone, ethylacetate, and water mixture 2:2:1 (v/v/v). The extract was purified by flash chromatography with aluminum oxide and florisil. A multiresidue gas chromatography-mass spectrometry method was applied to...

Journal: :Al Kimiya: Jurnal Ilmu Kimia dan Terapan 2023

Characterization of secondary metabolites and cytotoxic testing Haliclona sp. against T47D breast cancer cells were conducted in this study. The objective was to assess the cytotoxicity identify functional groups involved. research methods employed included maceration, partitioning, phytochemical testing, toxicity using BSLT method, separation through flash column chromatography (FCC), MTT char...

برومندفر, خدیجه, دلارام, معصومه, صفدری, فرانک, نوریان, کبری, کاظمیان, افسانه,

Background and Aim: Menopause is a period in women’s lives that is accompanied with outcomes and effects which can adversely affect on the quality of life and weaken well-being. The most widely recognized outcome of menopause is hot flash that adversely affects on work, social activities, enjoying life, sleep, and- in sum- total quality of living. The common treatment of this symptom is hormone...

Journal: :the iranian journal of pharmaceutical research 0
fatemeh nahidi faculty member of midwifery department shaheed behashti universty elham zare school of pharmacy and pharmaceutical sciences research center, shahid beheshty university of medical sciences, tehran, iran. faraz mojab school of pharmacy and pharmaceutical sciences research center, shahid beheshty university of medical sciences, tehran, iran. hamid alavi-majd department of biostatistics, school of paramedical, shahid beheshti university of medical sciences, tehran, iran.

vasomotor hot flash is the most common and distressful complication of menopausal women. its treatment is the most frequent clinical challenge. as a result, an effective and harmless therapy is needed. this double-blind controlled clinical trial was conducted to determine the effects of licorice roots on the relief and recurrence of hot flash in menopausal women referring to the healthcare cent...

For some of the EOS models the dimension of equilibrium problem can be reduced. Stability and difficulties in implementation are among the problems of flash calculation. In this work, a new reduction technique is presented to prepare a reduced number of equilibrium equations. Afterwards, a number of appropriate solution variables are selected for the prepared equation system to solve the equati...

Journal: :Journal of lipid research 1987
W R Snyder

Dioctanoylthiophosphatidylcholine, a racemic thiophosphate analog of L-alpha-dioctanoylphosphatidylcholine, has been synthesized and isolated by flash chromatography. In contrast with the didecanoylthiophosphatidylcholine synthesized previously, the analog is easily dispersed on sonication in aqueous media and is rapidly hydrolyzed to produce a free thiol group in the presence of the extracellu...

2006
Vincenzo Tortorella Francesca Cateni Gioacchino Falsone Jelena Zilic Paolo Bonivento Marina Zacchigna Dušan Žigon Silvio Sosa Gianmario Altinier

Two new glyceroglycolipids as well as three known ones were isolated from the glyceroglycolipids molecular species obtained from two less polar fractions of the MeOH extract of the plant Euphorbia nicaeensis All. using normal and reversed phase column flash chromatography. The structures of the isolated glyceroglycolipids were determined on the basis of chemical and spectroscopic evidences. Two...

2009
Sérgio M. F. Vilela Filipe A. Almeida Paz João P. C. Tomé Verónica de Zea Bermudez José A. S. Cavaleiro João Rocha

The title compound, C(6)H(6)Cl(2)N(4)O(2), was prepared by the nucleophilic substitution of 2,4,6-trichloro-1,3,5-triazine by glycine methyl ester hydro-chloride, and was isolated from the reaction by using flash chromatography. The crystal structure at 150 K reveals the presence two crystallographically independent mol-ecules in the asymmetric unit which differ in the orientation of the pendan...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2011
Chuichi Watanabe Shihori Takeda Robert R Freeman Hajime Ohtani

A novel and simple interface for capillary gas chromatography-mass spectrometry (GC-MS) was developed using a piece of deactivated stainless-steel tubing. This interface eliminated the need to vent the MS ion source when changing columns. Various chromatographic performance indicators, such as inertness, and thermal and chemical stability, were confirmed to be unaffected by using this interfa...

ژورنال: :مجله دانشگاه علوم پزشکی اراک 0
علیرضا مرادآبادی alireza moradabadi department of hematology and laboratpry sciences, kerman university of medical sciences, kerman, iranگروه خون شناسی و علوم آزمایشگاهی، دانشگاه علوم پزشکی کرمان، کرمان، ایران علیرضا فارسی نژاد alireza farsinezhad phd of hematology, department of hematology, pathology and stem cell research center, kerman university of medical sciences, kerman, iranدکترای تخصصی هماتولوژی، گروه هماتولوژی، مرکز تحقیقات پاتولوژی و سلول های بنیادی، دانشگاه علوم پزشکی کرمان، کرمان، ایرانسازمان اصلی تایید شده: دانشگاه علوم پزشکی کرمان (kerman university of medical sciences) مریم فکری صوفی آبادی maryam fekri soofiabadi msc in biochemistry, department of pathology, pathology and stem cell research center, kerman university of medical sciences, kerman, iranکارشناس ارشد بیوشیمی،گروه پاتولوژی، مرکز تحقیقات پاتولوژی و سلول های بنیادی، دانشگاه علوم پزشکی کرمان، کرمان، ایرانسازمان اصلی تایید شده: دانشگاه علوم پزشکی کرمان (kerman university of medical sciences)

زمینه وهدف: لیشمانیوز یک بیماری انگلی تک یاخته ای است که به عنوان یک معضل بهداشتی در بسیاری از کشورها مطرح است.هدف از این مطالعه، تشخیص عفونت انگل در انسان به منظور شناسایی اپیدمیولوژیک و ارائه برنامه کنترل با استفاده از پرایمر اختصاصی مشترک طراحی شده در سه گونه لیشمانیا است. مواد و روش ها:30 نمونه ایزوله شایع انگل لیشمانیا از مراکز مختلف در ایران جمع آوری شد. dna این ایزوله ها پس از کشت در محی...

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