نتایج جستجو برای: atmospheric pressure

تعداد نتایج: 473990  

Journal: :Applied optics 1995
X Quan E S Fry

We have determined an empirical equation for the index of refraction of water as a function of temperature, salinity, and wavelength at atmospheric pressure. The experimental data selected by Austin and Halikas ["The index of refraction of seawater," SIO Ref. 76-1 (Scripps Institution of Oceanography, La Jolla, Calif., 1976)] were fitted to power series in the variables. A ten-parameter empiric...

2002
Katalin Solymosi László Smeller Judit Fidy Béla Böddi

The kinetics of protochlorophyllide phototransformation and of the subsequent blue shift were studied in homogenates prepared from etiolated wheat leaves using fluorescence spectroscopy at high pressures. The pressure dependence of the processes was studied between 0.1 and 400 MPa. The activation volumes were calculated from the pressure dependence of the kinetical curves of the processes and w...

2011
H. M. Ng

The mean sea level trend estimates from shorter records (less than 50 years) are easily influenced by a number of additional transient effects including atmospheric pressure variations, interannual and decadal changes in the mean sea level or various station dependent disturbances, which are not always accounted for in previous studies because their influences may be negligible for stations lon...

Journal: :Chemical communications 2014
Yingming Zhu Dongsheng Liu Ming Meng

Black TiO2 was usually obtained via hydrogenation at high pressure and high temperature. Herein, we reported a facile hydrogenation of TiO2 in the presence of a small amount of Pt at relatively low temperature and atmospheric pressure. The hydrogen spillover from Pt to TiO2 accounts well for the greatly enhanced hydrogenation capability. The as-synthesized Pt/TiO2 exhibits remarkably improved p...

Journal: :Chemical communications 2014
Yanli Xu Jinwu Zhao Huoji Chen Wanqing Wu Huanfeng Jiang

A simple and efficient synthesis of cyclopentadienones via palladium-catalyzed cyclocarbonylation of alkynes under atmospheric pressure of carbon monoxide has been developed. The transformation was carried out under mild and ligand-free conditions, a wide range of substrates and exceptional functional group tolerance.

1999
M. Sugihara

In order to improve the accuracy of repeat gravity surveys for reservoir monitoring, it is desirable to perform continuous gravity measurements in addition to the ordinary survey program. We can apply time series analysis to the continuous recording to evaluate the causes of various gravity variations. We have made continuous gravity measurements using a Scintrex CG-3M gravimeter at several geo...

Journal: :Chemical communications 2013
Rhodri E Owen Justin P O'Byrne Davide Mattia Pawel Plucinski Sofia I Pascu Matthew D Jones

A series of cobalt heterogeneous catalysts have been developed that are effective for the conversion of CO2 to hydrocarbons. The effect of the promoter and loadings have been investigated.

2016
Yusuke Ominami Kenji Nakahira Akiko Hisada Makoto Nakabayashi Minami Shoji Mai Yoshihara Kenichi Sato

Yusuke Ominami, Dr. Eng. Kenji Nakahira, Dr. Eng. Akiko Hisada Makoto Nakabayashi Minami Shoji Mai Yoshihara Kenichi Sato Sukehiro Ito OVERVIEW: Hitachi High-Technologies developed the AE1500, a tabletop atmospheric SEM that is capable of scanning electron microscopy under atmospheric pressure, by using a membrane that allows an electron beam to pass while keeping the atmospheric-pressure chamb...

2013
Laura Kerber François Forget Robin Wordsworth James W. Head Lionel Wilson

0019-1035/$ see front matter 2012 Elsevier Inc. A http://dx.doi.org/10.1016/j.icarus.2012.11.037 ⇑ Corresponding author. Fax: +33 06 41 67 41 62. E-mail address: [email protected] (L. Kerber). A planetary global circulation model developed by the Laboratoire de Météorologie Dynamique (LMD) was used to simulate explosive eruptions of ancient martian volcanoes into paleo-atmospheres with high...

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