نتایج جستجو برای: temperature rising

تعداد نتایج: 486843  

2013
H. A. SHILAJYAN

Interactions of potassium salt–dimethylsulfoxide (DMSO)–water systems in 25–45C temperature range were studied using electrical conductivity method. The results show that the conductance of these solutions depends on anions salvation state and is reduced according to this row: 3 NO Cl I Br        . Ion mobility increases with rising of temperature, which leads to an increase in the limit...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

2013
Khalid Siraj

The ionic conductivity of 8, 9 and 10 mol% K doped Ag2CdI4 showed slight decrease whereas the phase transition was observed almost at the same temperature as it reported for pure Ag2CdI4. This decrease in conductivity likely results from decrease in free volume because of the larger K ions ( K r  = 133 pm and Ag r  = 129 pm) entering Ag2CdI4 lattice which is unchanging in size. The dielectric...

2002
Michael D. Rutter Richard A. Secco Hongjian Liu Takeyuki Uchida Mark L. Rivers Stephen R. Sutton Yanbin Wang

Synchrotron x-ray radiography has been used to measure the viscosity of pure liquid Fe at high pressure and temperature in a large volume press. A probe sphere rising through liquid Fe at high pressure and temperature is imaged, in situ, allowing for the derivation of sample viscosity through a modified form of Stokes’ equation. The effect of pressure on viscosity is fit by the semi empirical f...

Journal: :Environmental science & technology 2005
Youxue Zhang

The sequestration of fossil fuel CO2 in the deep ocean has been discussed by a number of workers, and direct ocean experiments have been carried out to investigate the fate of rising CO2 droplets in seawater. However, no applicable theoretical models have been developed to calculate the dissolution rate of rising CO2 droplets with or without hydrate shells. Such models are important for the eva...

Journal: :The Journal of General Physiology 1942
L. R. Blinks

The effect of temperature upon the bioelectric potential across the protoplasm of impaled Valonia cells is described. Over the ordinary tolerated range, the P.D. is lowest around 25 degrees C., rising both toward 15 degrees and 35 degrees . The time curves are characteristic also. The magnitude of the temperature effect can be controlled by changing the KCl content of the sea water (normally 0....

2014
Nathan P. Lemoine Deron E. Burkepile John D. Parker

Rising temperatures can influence the top-down control of plant biomass by increasing herbivore metabolic demands. Unfortunately, we know relatively little about the effects of temperature on herbivory rates for most insect herbivores in a given community. Evolutionary history, adaptation to local environments, and dietary factors may lead to variable thermal response curves across different sp...

2014
Paolo Domenici Bridie J. M. Allan Sue-Ann Watson Mark I. McCormick Philip L. Munday

Recent studies have shown that elevated CO2 can affect the behaviour of larval and juvenile fishes. In particular, behavioural lateralization, an expression of brain functional asymmetries, is affected by elevated CO2 in both coral reef and temperate fishes. However, the potentially interacting effects of rising temperatures and CO2 on lateralization are unknown. Here, we tested the combined ef...

2016
Tianhua He Haylee D’Agui Sim Lin Lim Neal J. Enright Yiqi Luo

Substantial climate changes are evident across Australia, with declining rainfall and rising temperature in conjunction with frequent fires. Considerable species loss and range contractions have been predicted; however, our understanding of how genetic variation may promote adaptation in response to climate change remains uncertain. Here we characterized candidate genes associated with rainfall...

2008

Rice is arguably the most important food source on the planet and is consumed by over half of the world’s population. Considerable increases in yield are required over this century to continue feeding the world’s growing population. This meta-analysis synthesizes the research to date on rice responses to two elements of global change, rising atmospheric carbon dioxide concentration ([CO2]) and ...

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