نتایج جستجو برای: reactant concentration

تعداد نتایج: 383815  

Journal: :Environmental science 2023

Human skin oil is rich in ozone-reactive constituents, including squalene and unsaturated acyl groups of free fatty acids, glycerols, wax esters. Squalene are each responsible...

Journal: :SIAM Journal on Applied Mathematics 1987

Journal: :The Journal of chemical physics 2014
Penghao Xiao Qiliang Wu Graeme Henkelman

Within the harmonic approximation to transition state theory, the rate of escape from a reactant is calculated from local information at saddle points on the boundary of the state. The dimer minimum-mode following method can be used to find such saddle points. But as we show, dimer searches that are initiated from a reactant state of interest can converge to saddles that are not on the boundary...

2013
Rupak Banerjee Satish G. Kandlikar

Water management is crucial to the performance of PEM fuel cells. Water is generated as part of the electrochemical reaction, and is removed through the reactant channels. This results in two-phase flow in the reactant channels. Increased understanding of the behavior of the liquid water in the channels allows us to devise better strategies for managing the water content inside the fuel cell. M...

Journal: :Angewandte Chemie 2015
Jianfeng Xu Xingkuan Chen Ming Wang Pengcheng Zheng Bao-An Song Yonggui Robin Chi

A convergent, organocatalytic asymmetric aminomethylation of α,β-unsaturated aldehydes by N-heterocyclic carbene (NHC) and (in situ generated) Brønsted acid cooperative catalysis is disclosed. The catalytically generated conjugated acid from the base plays dual roles in promoting the formation of azolium enolate intermediate, formaldehyde-derived iminium ion (as an electrophilic reactant), and ...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2014
Kento Shimaoka Shota Kuwahara Makoto Yamashita Kenji Katayama

Photocatalytic organic reactions were performed using automatic photocatalytic microreactor, where several open-end capillaries with photocatalytic materials coated inside were just soaked in a test tube including a reactant solution. Organic reactions of the alkyl radicals generated from carboxylic acids due to the photo-Kolbe reaction was studied, in analogy with the reactions using a photose...

Journal: :Microelectronics Reliability 2007
Liliana Caristia Giuseppe Nicotra Corrado Bongiorno Nicola Costa Sebastiano Ravesi Salvo Coffa Riccardo De Bastiani Maria Grazia Grimaldi Corrado Spinella

This work reports the study concerning the influence of the preparation conditions on the structure of silicon rich oxide (SRO) deposited by PECVD method by which the structural properties of the film are strictly related. In particular we investigated the role of reactant gases N2O and SiH4 on the total Si concentration, Si excess concentration, Si clustered concentration and size of nanoclust...

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