نتایج جستجو برای: chemical preparation

تعداد نتایج: 542016  

1996
R.G. Agrawal P.C. Joshi M.J. Pandey G. Pandey

The drug standardization project functioning at IIADR, Tarikhet has carried out chemical studies and other investigations on Tribhuvanakirti rasa a commonly used medicinal preparation in current practice, these studies are presented in this paper.

Journal: :analytical and bioanalytical chemistry research 2014
mir ali farajzadeh leila khoshmarram saheleh sheykhizadeh

foodstuffs analysis is very important due to population growth and increasing consumer demand for safety and nutritional excellence. the analysis of different compounds in foodstuffs is so difficult without using sample preparation techniques. traditional techniques require large amounts of toxic organic solvents. as a result, they are not only expensive but also environmentally unfriendly and ...

Journal: :Bioinformatics 2015
John D. Westbrook Chenghua Shao Zukang Feng Marina Zhuravleva Sameer Velankar Jasmine Young

UNLABELLED The Chemical Component Dictionary (CCD) is a chemical reference data resource that describes all residue and small molecule components found in Protein Data Bank (PDB) entries. The CCD contains detailed chemical descriptions for standard and modified amino acids/nucleotides, small molecule ligands and solvent molecules. Each chemical definition includes descriptions of chemical prope...

2012
Carlos J. Durán-Valle

carbon from waste biomass. Journal of Hazardous Materials, Vol. 165, No. 1-3, (June 2009), pp. (481–485), ISSN 0304-3894. [39] Tongpoothorn, W., Sriuttha, M., Homchan, P., Chanthai, S. & Ruangviriyachai, C. (2011). Preparation of activated carbon derived from Jatropha curcas fruit shell by simple thermo-chemical activation and characterization of their physico-chemical properties Chemical Engin...

2011
Ryuichi Watanabe Toshiyuki Suzuki Yasukatsu Oshima

Mouse bioassay is the official testing method to quantify paralytic shellfish toxins (PSTs) in bivalves. A number of alternative analytical methods have been reported. Some methods have been evaluated by a single laboratory validation. Among the different types of methods, chemical analyses are capable of identifying and quantifying the toxins, however a shortage of the necessary calibration st...

2015
P. A. Nimal Punyasiri Brasathe Jeganathan Jeevan Dananjaya Kottawa-Arachchi Mahasen A. B. Ranatunga I. Sarath B. Abeysinghe M. T. Kumudini Gunasekare B. M. Rathnayake Bandara

Chemical analysis of the Sri Lankan tea (Camellia sinensis, L.) germplasm would immensely contribute to the success of the tea breeding programme. However, the polyphenols, particularly catechins (flavan-3-ols), are readily prone to oxidation in the conventional method of sample preparation. Therefore, optimization of the present sample preparation methodology for the profiling of metabolites i...

Journal: :Acta biochimica Polonica 2007
Leonid L Danilov Tatyana N Druzhinina

Several methods for simple and efficient chemical synthesis of dolichyl phosphates and their analogues and derivatives are briefly summarized with a special emphasis on chemical modification of phosphoryl group and preparation of dolichyl phosphates labelled at the omega-end and at the gamma-isoprene unit of the isoprene chain by fluorescent groups, 2-aminopyridine and 1-aminonaphtalene residue...

Journal: :Organic & biomolecular chemistry 2013
Monica Deponti Sergei I Kozhushkov Dmitry S Yufit Lutz Ackermann

The chemical behavior of cyclopropyl-substituted alkynes has been probed using the reaction conditions of ruthenium-catalyzed oxidative C-H/O-H and C-H/N-H bond functionalizations. The oxidative annulations proceeded with complete conservation of all cyclopropane fragments and allowed for the one-step preparation of synthetically useful cyclopropyl-substituted isocoumarins and isoquinolones wit...

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