The Properties and Structure of Water

Author(s):  
Patrick Echlin
Keyword(s):  
2018 ◽  
Author(s):  
Sandeep K. Reddy ◽  
Raphael Thiraux ◽  
Bethany A. Wellen Rudd ◽  
Lu Lin ◽  
Tehseen Adel ◽  
...  

Vibrational sum-frequency generation (vSFG) spectroscopy is used to determine the molecular structure of water at the interface of palmitic acid monolayers. Both measured and calculated spectra display speci c features due to third-order contributions to the vSFG response which are associated with nite interfacial electric potentials. We demonstrate that theoretical modeling enables to separate the third-order contributions, thus allowing for a systematic analysis of the strictly surface-sensitive, second-order component of the vSFG response. This study provides fundamental, molecular-level insights into the interfacial structure of water in a neutral surfactant system with relevance to single layer bio-membranes and environmentally relevant sea-spray aerosols. These results emphasize the key role that computer simulations can play in interpreting vSFG spectra and revealing microscopic details of water at complex interfaces, which can be difficult to extract from experiments due to the mixing of second-order, surface-sensitive and third-order, bulk-dependent contributions to the vSFG response.


1994 ◽  
Vol 30 (5) ◽  
pp. 261-268 ◽  
Author(s):  
Selmin Burak ◽  
I. Ethem Gönenç ◽  
Arzu Erol

This paper examines the administrative and legal structure of the wastewater sector in Turkey, identifying its shortcomings and their causes, and suggests solutions. The study begins by outlining the existing administrative and legal structure, then focusing on the areas where difficulties are faced and seeking solutions to them. Those administrative and legal facets which have produced improvements and/or function effectively have been analysed so as to provide examples for other areas. When examining the sector it was observed that problems common to every area are the failure to adequately define powers and responsibilities, the lack of coordination between sectoral organisations, and the fact that attention is generally concentrated on routine matters of secondary importance. The fact that numerous organisations share powers in the same area causes confusion. Plurality also creates difficulties where enforcement is concerned. The existence of more than one set of regulations relating to the same area gives rise to loopholes. At the same time, unrealistic, and hence unenforceable standards undermine the effectiveness of sanctions. It has been concluded that a single organisation should be invested with the legal powers to lay down the principles of water management, that environmental courts should be set up to enforce legislation by means of sanctions; and that for this purpose existing legislation should be reexamined and revised as necessary and/or brought up to date.


2017 ◽  
Vol 11 (2) ◽  
pp. 187-201 ◽  
Author(s):  
Bacal Petru ◽  
Burduja Daniela

Abstract The purpose of this research consists in the elucidation of spatial and branch aspects of the water use in the river basins of Republic of Moldova. The main topics presented in this paper are: 1) the dynamics of water use; 2) spatial and branch profile of water use and its dynamics: 3) existing problems in the evaluation and monitoring of water use. To achieve these objectives were used traditional methods of geographical and economic research. Also, the content of the present study is focused on the methodology to elaborate the management plans of hydrographical basins and their chapters on economic analysis of water use in the river basin. of Republic of Moldova.


1976 ◽  
Vol 16 (5) ◽  
pp. 739-747 ◽  
Author(s):  
Yu. M. Kessler ◽  
V. P. Emelin ◽  
A. I. Mishustin ◽  
P. S. Yastremskii ◽  
E. S. Verstakov ◽  
...  
Keyword(s):  

Langmuir ◽  
1994 ◽  
Vol 10 (3) ◽  
pp. 653-657 ◽  
Author(s):  
Omar A. El Seoud ◽  
Andrei Blasko ◽  
Clifford A. Bunton

1984 ◽  
Vol 25 (2) ◽  
pp. 232-233
Author(s):  
A. K. Lyashchenko

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