TO STUDY THE EFFECT OF ANHYDROUS SOLVENT ON METHOTREXATE BY USING UV-SPECTROPHOTOMETER

2017 ◽  
pp. 904-911 ◽  
Author(s):  
Mahesh Pratapwar
Keyword(s):  
Anhydrous Solvent

Characterisation of silicon electrodes in absolute anhydrous solvent

1982 ◽  
Vol 138 (2) ◽  
pp. 435-442 ◽  
Author(s):  
Dominique Guyomard ◽  
Michel Herlem ◽  
Charles Mathieu ◽  
Claudie Miossec ◽  
Jean-Lou Sculfort
Keyword(s):  
Anhydrous Solvent

Enhancement of Third-Order Optical Susceptibility in Polythiophene Thin Films Fabricated by Drop Casting Using Anhydrous Solvent

2011 ◽  
Vol 50 (7R) ◽  
pp. 072601 ◽  
Author(s):  
Takashi Kobayashi ◽  
Toshiyuki Endo ◽  
Wataru Shinke ◽  
Takashi Nagase ◽  
Shuichi Murakami ◽  
...  
Keyword(s):  
Thin Films ◽  
Third Order ◽  
Optical Susceptibility ◽  
Anhydrous Solvent

ChemInform Abstract: CHARACTERIZATION OF SILICON ELECTRODES IN ABSOLUTE ANHYDROUS SOLVENT

1982 ◽  
Vol 13 (47) ◽  
Author(s):  
D. GUYOMARD ◽  
M. HERLEM ◽  
C. MATHIEU ◽  
C. MIOSSEC ◽  
J.-L. SCULFORT
Keyword(s):  
Abstract Characterization ◽  
Anhydrous Solvent

scholarly journals Isolation of some precursors of 2-methylpyrrole in the Elson–Morgan reaction

1970 ◽  
Vol 120 (4) ◽  
pp. 873-876 ◽  
Author(s):  
Franca Serafini-Cessi ◽  
C. Cessi
Keyword(s):  
Acid Hydrolysis ◽  
Amino Group ◽  
Mild Conditions ◽  
Derivatives Of ◽  
Anhydrous Solvent

1-C-(1-Acetylacetonyl)-2-deoxy-2-(1-methyl-3-oxobut-1-enyl)amino -d-galactitol is obtained from the condensation of 2-amino-2-deoxy-d-galactose with pentane-2,4-dione in anhydrous solvent. On treatment with hot alkali it gives 2-methylpyrrole with 37% yield. By acid hydrolysis under mild conditions the compound loses the N substituent and from the resulting unstable derivative 2-methylpyrrole is obtained (52% yield). It is concluded that derivatives of aminohexoses substituted at C-1 with a dioxopentyl chain are the precursors of 2-methylpyrrole in the Cessi & Serafini-Cessi (1963) modification of the Elson–Morgan reaction. As demonstrated previously, products of condensation of aminohexoses with pentane-2,4-dione at the amino group are not converted directly into 2-methylpyrrole, but this step provides protection of the amino group during condensation at C-1.

Role of important parameters in ring opening polymerization of polylactide

2011 ◽  
Vol 31 (2-3) ◽  
Author(s):  
Paramjit Kaur ◽  
Rajeev Mehta ◽  
Sidh Nath Upadhyay
Keyword(s):  
Molecular Weight ◽  
Ring Opening ◽  
Side Reaction ◽  
Polymerization Reaction ◽  
Polymerization Temperature ◽  
Polymer Yield ◽  
A Value ◽  
Prolonged Reaction Time ◽  
Anhydrous Solvent

Abstract Different parameters, namely polymerization temperature, polymerization time, monomer/initiator ratio, nature of the initiator, amount of water or other impurities etc. are very significant for polymerization reactions either in bulk or solution. Monomer to initiator ratio has a very significant role in polymerization reactions and a value ranging from 50 to 5000 that has been reported by different researchers. Recrystallization of the monomer removes the meso compounds from the monomer, which absorbs the moisture and effects polymerization reaction. So, it is necessary to recrystallize the monomer with any anhydrous solvent like dry toluene, ethyl acetate etc. Prolonged reaction time cannot increase the polymer yield; it generally causes the decrease of molecular weight and broadening of molecular weight distribution of formed polymers. This is probably due to the transesterification side reaction in polymerization, intensifying at prolonged time periods. Several groups like hydroxyl and carboxylic acid affect the polymerization rate.

Interaction of chlorides with soils — a factor in salt retention by saline soils

Soil Research ◽  
1982 ◽  
Vol 20 (4) ◽  
pp. 325
Author(s):  
BM Tucker
Keyword(s):  
Land Use ◽  
Ethylene Glycol ◽  
Soluble Form ◽  
Saline Soils ◽  
Moisture Contents ◽  
Aqueous Solvent ◽  
Dry Soil ◽  
The Difference ◽  
Chloride Salts ◽  
Anhydrous Solvent

The soluble chloride salts in soils may be divided into two parts, one which is freely soluble even at low moisture contents and may be extracted by a suitable anhydrous solvent, and a second which becomes soluble only when ample moisture is present. The chloride retained in the less soluble form may be estimated by the difference between the chloride extracted from a dry soil sample by an anhydrous mixture of 90% ethanol and 10% ethylene glycol and that extracted by an aqueous solvent, 17% glycerol with 83% water. This technique could be used to identify weakly and strongly salt-retentive soils, and to follow changes in salt retention caused by various types of land use.

Characterisation of organoboron ligands by electrospray mass spectrometry using anhydrous solvent application

1994 ◽  
Vol 29 (12) ◽  
pp. 806-807 ◽  
Author(s):  
Francine Libot ◽  
Henri Virelizier ◽  
Olivier Froelich ◽  
Martine Bonin ◽  
Jeancharles Quirion ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Mass Spectrometry ◽  
Anhydrous Solvent
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