نتایج جستجو برای: water structure

تعداد نتایج: 2058744  

Journal: :Current Opinion in Structural Biology 2002

Journal: :Philosophical Magazine 1968

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2007
mohammad simjoo mohsen vafaie sefti ahmad dadvand koohi reza hasheminasab valiahmad sajadian

in this paper, polyacrylamide/chromium acetate gel polymer system was prepared as water shut-off system to control water production in one of the iranian oil reservoirs condition. effect of various parameters such as temperature (90 °c) and water formation from view point of salinity and divalent cations, was evaluated on the gelation kinetic and gel strength using bottle testing method. the re...

Journal: :The journal of physical chemistry. B 2007
Wei Jiang Yanting Wang Gregory A Voth

Molecular dynamics simulations have been carried out to investigate nanostructural organization in mixtures of 1-octyl-3-methylimidazolium nitrate ionic liquid and water at multiple water concentrations. Evolution of the polar network, water network, and micelle structures is visualized and analyzed via partial radial distribution functions. The calculated static partial structure factors show ...

There is a multifaceted approach of water resource in a watershed, which is accompanied by complexity and issues such as the interaction of natural and human systems. Achieving the consistent governance of water resources is one of the most important management approaches in the water sector, which requires a coherent structure of knowledge transfer and information on the organizations stakehol...

Journal: :The journal of physical chemistry. A 2008
Piotr A Pieniazek Joost VandeVondele Pavel Jungwirth Anna I Krylov Stephen E Bradforth

The spectroscopic signatures of proton transfer in the water dimer cation were investigated. The six lowest electronic states were characterized along the reaction coordinate using the equation-of-motion coupled-cluster with single and double substitutions method for ionized systems. The nature of the dimer states was explained in terms of the monomer states using a qualitative molecular orbita...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Tamsin L Malkin Benjamin J Murray Andrey V Brukhno Jamshed Anwar Christoph G Salzmann

The freezing of water to ice is fundamentally important to fields as diverse as cloud formation to cryopreservation. At ambient conditions, ice is considered to exist in two crystalline forms: stable hexagonal ice and metastable cubic ice. Using X-ray diffraction data and Monte Carlo simulations, we show that ice that crystallizes homogeneously from supercooled water is neither of these phases....

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