نتایج جستجو برای: propylene

تعداد نتایج: 6219  

Journal: :Applied microbiology 1974
A Hart M W Brown

Liquid propylene oxide added to a variety of disinfectant solutions resulted in a significant reduction of the bacterial spore content of these solutions.

K. Sedighi M. Ebrahimi M. Farhadi, S. Akbarzadeh

In this paper, the measurement of the viscosity of ZnO in ethylene glycol, propylene glycol, mixture of ethylene glycol and water (60:40 by weight), and a mixture of propylene glycol and water (60:40 by weight) and the thermal conductivity in ethylene glycol and propylene glycol as base fluids in the range of temperature from 25 ºC to 60 ºC are investigated. The results indicate that as the tem...

Journal: :Icarus 2021

Infrared (IR) spectra of the hydrocarbon ices C3H8 (propane), C3H6 (propylene, propene), and C3H4 (propyne, methylacetylene) are relevant to study low-temperature chemistry spectroscopy objects within beyond Solar System, but IR band strengths absorption coefficients lacking for these compounds. Here we present new crystalline non-crystalline forms C3H8, C3H6, C3H4. Measurements ice density ref...

Journal: :Environmental science & technology 2009
Kelly E Fletcher Frank E Löffler Hans-Hermann Richnow Ivonne Nijenhuis

The isotope fractionation of 1,2-dichloropropane (1,2-D) during dichloroelimination to propene by Dehalococcoides populations was explored in laboratory experiments in order to provide data for the characterization of the fate of 1,2-D in heterogeneous subsurface systems. Compound specific stable carbon isotope analysis (CSIA) was used to determine the bulk enrichment factors (epsilonbulk), rea...

Journal: :Physical chemistry chemical physics : PCCP 2014
L M Molina M J López J A Alonso

Ab initio density functional simulations have been performed to study the adsorption of propene on partially oxidized silver surfaces and its interaction with surface oxygen. Two different adsorption conformations for propene are studied, with the molecule either intact or forming an Ag-C3H6-O oxymetallacycle (OMC) intermediate. Then, pathways for propene oxide, acrolein and propanone formation...

2012
S J Swamy A Dharma

Complexes of oxovanadium(lV) with N,N' -ethylene-bis-(2-aminobenzamide) [EBAB], N,N ' -propylene-bis-(2ami nobenzamide) [PBAB], N.N ' -(o-phenylene)-bis-(2-aminobenzamide) [PhBAB] , N,N' -ethylene-bis-(3-carboxypropenamide) [EBCP], N,N' -propylene-bis-(3-carboxypropenamide) [PBCP]and 1-(2'-hydroxyphenyl)-3-phenyl-I ,3-propanedione [HPPPD] have been prepared and characterized by chemical analyse...

2017
Lihua Guo Chen Zou Shengyu Dai Changle Chen Marinos Pitsikalis

In this work, we studied propylene polymerization using some α-diimine palladium catalysts with systematically varied ligand sterics. In propylene polymerization, the ligand steric effect exhibits significant variations on the catalytic activity, polymer molecular weight, and branching density. However, the regio control for the polymer microstructure is poor. Furthermore, copolymerization of 1...

2015
Stefan Naumann Anthony W Thomas Andrew P Dove

The metal-free polymerization of propylene oxide (PO) using a special class of alkene—N-heterocyclic olefins (NHOs)—as catalysts is described. Manipulation of the chemical structure of the NHO organocatalyst allows for the preparation of the poly(propylene oxide) in high yields with high turnover (TON>2000), which renders this the most active metal-free system for the polymerization of PO repor...

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