نتایج جستجو برای: hptlc densitometry

تعداد نتایج: 4132  

2014
Shuai Sun Hailing Liu Shunjun Xu Yuzhen Yan Peishan Xie

Due to the scarcity of resources of Ziziphi spinosae semen (ZSS), many inferior goods and even adulterants are generally found in medicine markets. To strengthen the quality control, HPLC fingerprint common pattern established in this paper showed three main bioactive compounds in one chromatogram simultaneously. Principal component analysis based on DAD signals could discriminate adulterants a...

2013
Vertika Khare Pradeep Kushwaha Shikhar Verma Abhishek Gupta Sharad Srivastava Ajay Kumar Singh Rawat

Background: Urtica dioica L. is a common Himalayan species which produces allergenic substances causing oedema and inflammation in humans. It has become a source of folk medicine for the treatment of many diseases. The leaves and roots both are used internally as a blood purifier and diuretic and an infusion of the plant is used for nasal and menstrual haemorrhage, diabetes, rheumatism, eczema,...

2013
KVVS Krishna K Gouri Sankar M Syam Vardhan T Tamizhmani

A simple, rapid and reliable HPTLC method has been developed for simultaneous estimation of Chebulagic acid and Chebulinic acid in marketed polyherbal formulations. Identification and quantification were performed on 10cm x 10cm, layer thickness 0.2mm, aluminumbacked silica gel 60 F254 HPTLC plates previously washed with methanol. The solvent system consisting of Ethyl Acetate: Toluene: Formic ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه الزهراء - دانشکده علوم پایه 1388

جداسازی ترکیبات دارویی، به منظور تحقیق و کنترل کیفیت در صنعت داروسازی، تعیین مقدار مقادیر کم دارو در پلاسما، بافت و خون، در آزمایشگاه های تشخیص پزشکی و پزشکی قانونی اهمیت ویژه ای دارد. تکنیک ساده، ارزان، کارآمد و انعطاف پذیر کروماتوگرافی لایه نازک hptlc قادر به حل بسیاری از مشکلات موجود می باشد و می تواند جایگزین بسیار مناسبی برای تکنیک های معمول و پیچیده ی کروماتوگرافی گازی و کروماتوگرافی مایع...

2006
C. Sullivan J. Sherma

A new quantitative method using silica gel high-performance thinlayer chromatography (HPTLC) plates with fluorescent indicator, channels, and a concentration zone; instrumental bandwise application of standards and samples; development with dichloromethane–acetone, 4:1, as mobile phase; and ultraviolet absorption densitometry of fluorescence quenched zones is reported for determination of salic...

2016
Meenu Mehta Saurabh Satija Munish Garg

Objective: Boswellic acids (BAs) are active constituents of plant Boswellia serrata. In the present study boswellic acids were extracted from Boswellia serrata and dry methanolic extracts were quantified by HPLC and HPTLC. Method: A gradient HPLC method was used for the quantification of the boswellic acids; 11-keto-β-boswellic acid (KBA) and 3acetyl-11-keto-β-boswellic acid (AKBA). A direct HP...

2013
M. Venkataramana P. Shilpa K. Balakrishna H.S. Murali H.V. Batra

Hundred Fusarium culmorum strains, isolated from freshly harvested maize grain samples from Southern parts of India, were incubated in czapek-dox medium and analyzed for trichothecene (DON/NIV) production. The mPCR assay was standardized targeting trichothecene metabolic pathway genes viz., Tri6, Tri7, Tri13 for detection of trichothecene (DON/NIV) chemotypes and rDNA gene for specific detectio...

2010
P. Rajeswari S. Krishnakumari

To estimate phenols and flavonoids, enzymic antioxidants in the leaves of Boerhaavia erecta (LBE). The sample was extracted with 0.1M phosphate buffer for the analysis of phenols, flavonoids and antioxidants. The total phenolic content and total flavonoids in LBE were measured using Folin-Ciocalteau and aluminium chloride colorimetric methods respectively. The activity of Superoxide Dismutase (...

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