scholarly journals Oxidation of Aromatic Alcohols with Chromium(VI) Trioxide in the Presence of “Wet-Aluminium Oxide” in Aprotic Solvent

1990 ◽  
Vol 63 (8) ◽  
pp. 2433-2434 ◽  
Author(s):  
Masao Hirano ◽  
Hisanori Kuroda ◽  
Takashi Morimoto
Keyword(s):  
Aprotic Solvent ◽  
Aluminium Oxide ◽  
Chromium Vi ◽  
Aromatic Alcohols

Oxidative Stress and Chromium(VI) Carcinogenesis

2008 ◽  
Vol 27 (2) ◽  
pp. 77-88 ◽  
Author(s):  
Hua Yao ◽  
Lan Guo ◽  
Bing-Hua Jiang ◽  
Jia Luo ◽  
Xianglin Shi
Keyword(s):  
Oxidative Stress ◽  
Chromium Vi

Methods to Determine Phytopharmaceuticals in Tobacco and Tobacco Products. 4th Report: A Procedure to Determine Vamidothion and its Metabolites/Methoden zur Bestimmung von Phytopharmaka in Tabak und Tabakerzeugnissen: IV. Mitteilung: Ein Bestimmungsverfahren fuer Vamidothion und seine Metaboliten

1977 ◽  
Vol 9 (2) ◽  
Author(s):  
A.N. Sagredos ◽  
R. Moser
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Acetic Acid ◽  
Magnetic Resonance ◽  
Aluminium Oxide ◽  
Nuclear Magnetic Resonance Data ◽  
Gas Chromatograph ◽  
Tobacco Products ◽  
Magnetic Resonance Data ◽  
Resonance Data

AbstractBased on previous work (7) a method to simultaneously determine vamidothion [I], vamidothion-sulfoxide [II] and vamidothion sulfone [III] in tobacco has been developed. The compounds are extracted with water/acetone/acetic acid from the tobacco, cleansed over an aluminium oxide column and then determined on the gas chromatograph with the specific sulphur detector. Rates of recovery are 70 % - 92 %, the determination level is 0.1 ppm. Mass spectrometry and nuclear magnetic resonance data of vamidothion [I], vamidothion-sulfoxide [ II ] and vamidothion-sulfone [III] are given.

Testing Aluminium Oxide based Ceramics at Irregular Interrupted Cut

2013 ◽  
Vol 10 (2) ◽  
pp. 26-28
Author(s):  
Ladislav Kyncl ◽  
Robert Cep ◽  
Pavel Novacek ◽  
Jiri Schreier
Keyword(s):  
Aluminium Oxide ◽  
Cutting Effect ◽  
Intermittent Cutting

Abstract This article discusses the test removable ceramic plates during machining with interrupted cut. Tests were performed on a lathe, which was clamped preparation which simulated us the interrupted cut. By changing the number plates mounted in a preparation it was a regular or irregular cut. When with four plates it was regular interrupted cut, the remaining three variants were already irregular cut. It was examined whether it will have the irregular intermittent cutting effect on the insert and possibly how it will change life of inserts during irregular interrupted cut.

Synthesis of carbonate esters by carboxymethylation using NaAlO2 as a highly active heterogeneous catalyst

2018 ◽  
Author(s):  
Sreerangappa Ramesh ◽  
Kiran Indukuri ◽  
Olivier Riant ◽  
Damien Debecker
Keyword(s):  
Heterogeneous Catalyst ◽  
Dimethyl Carbonate ◽  
Sodium Aluminate ◽  
High Yield ◽  
Solid Catalyst ◽  
Highly Active ◽  
Aromatic Alcohols ◽  
Green Conditions ◽  
Mixed Carbonate

<p>Sodium aluminate is presented as a highly active heterogeneous catalyst able to convert a range of alcohols into the corresponding mixed carbonate esters, in high yield and under green conditions. The reaction is carried out using dimethyl carbonate both as a reactant and solvent, at 90°C. Allylic, aliphatic and aromatic alcohols are converted in good yields. The solid catalyst is shown to be truly heterogeneous, resistant to leaching, and recyclable. </p>

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