نتایج جستجو برای: atmospheric composition

تعداد نتایج: 332625  

2013
Ali Asghar Sadeghi Ali Nikkhah Amir Fattah Mohammad Chamani

This study was conducted to evaluate the effects of infrared irradiation for 60, 90, 120 and 150 seconds on starch degradability and chemical compositions of corn grains. Three ruminally fistulated rams were used to measure in sacco degradation. There was a linear increase in DM of irradiated corn grains (P<0.001). Infrared irradiation decreased potentially degradable fraction and constant degr...

Journal: :Acta chimica Slovenica 2015
Gerhard Lammel Alice Dvorská Jana Klánová Jiři Kohoutek Petr Kukučka Roman Prokeš Aissa M Sehili

Despite the fact that the occurrence of polycyclic aromatic hydrocarbons (PAHs) in the atmospheric environment has been studied for decades the photochemistry, deposition and, consequently, the long-range transport potential (LRTP) are not well understood. The reason is gas-particle partitioning (GPP) in the aerosol, its sensitivity to temperature and particulate phase composition, and sampling...

2005
Ralph D Lorenz

Planetary entry probes may carry a variety of ‘simple’ instrumentation to characterize the profiles of basic atmospheric physical properties and composition, in addition to sophisticated chemical analyses and imagers. I survey these ‘simple’ sensors, noting technological improvements in conventional atmospheric structure instruments as well as a number of less well-known instruments such as sho...

Journal: :Atmospheric Chemistry and Physics 2022

Abstract. The Indian Ocean is coupled to atmospheric dynamics and chemical composition via several unique mechanisms, such as the seasonally varying monsoon circulation. During winter season, high pollution levels are regularly observed over entire northern Ocean, while during summer monsoon, clean air dominates composition, leading distinct regimes. changing can interact with oceanic biogeoche...

2012
X. Y. Zhang Y. Q. Wang T. Niu X. C. Zhang S. L. Gong Y. M. Zhang J. Y. Sun

From 2006 to 2007, the daily concentrations of major inorganic water-soluble constituents, mineral aerosol, organic carbon (OC) and elemental carbon (EC) in ambient PM10 samples were investigated from 16 urban, rural and remote sites in various regions of China, and were compared with global aerosol measurements. A large difference between urban and rural chemical species was found, normally wi...

2014
Yao Chen Caiyu Wen Xiaoming Zhou Jun Zeng

In this study liquid phase equilibrium compositions were measured at 298.15 K under atmospheric pressure for (water + propan-1-ol + diethyl carbonate (DEC) + benzene or cyclohexane or heptane) quaternary systems and (water + DEC + propan-1-ol or benzene or cyclohexane) ternary systems. Good correlation of the experimental LLE data was seen for the measured systems by both modified and extended ...

Journal: :Computers & Mathematics with Applications 2013

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