نتایج جستجو برای: water pumps

تعداد نتایج: 560954  

Journal: :Journal of Development Studies 2021

Irrigation with electric pumps is cheaper than diesel in West Bengal where electricity and are unsubsidised, pump owners typically irrigate their winter rice crop often sell water to farmers who do not own pumps. Using purposefully selected primary data, we examine whether electric-pump have greater access production during the monsoon seasons compared diesel-pump buyers. We also pump-owners pr...

Davood Rahmatabadi Enayatolah Mohemi Hesam Moghadasi Moslem Tayebi Ramin Hashemi,

In this paper, the reasons of damage water pumps parts of the air compressor cooling system were studied. To reach this goal, the works like preparing metallographic samples, evaluation of structure, investigation of mechanical properties, the alloy parts detection and chemical analysis of deposit and corrosion products collected from the parts were performed. According to studies and results o...

Water requirements in many large water supply systems are provided by mixing water withdrawal from surface and underground resources with different quantity and quality.Water supply from underground sources requires energy consumption and surface water resources are limited and unstable.The aim of this research is managing optimal supply of required water of system with minimum energy cost and ...

Davood Rahmatabadi Enayatolah Mohemi Hesam Moghadasi Moslem Tayebi Ramin Hashemi,

In this paper, the reasons of damage water pumps parts of the air compressor cooling system were studied. To reach this goal, the works like preparing metallographic samples, evaluation of structure, investigation of mechanical properties, the alloy parts detection and chemical analysis of deposit and corrosion products collected from the parts were performed. According to studies and results o...

Journal: :E3S web of conferences 2021

The aim of the research is to identify hydrodynamic regularities in improvement operating modes water supply structures pumping stations with vertical vane pumps. authors studied conditions for supplying station and flow path pumps OP2...OP10 type. curvature jets causes swirl front impellers, directed counterclockwise units located left axis direction clockwise - right. With such a structure, m...

Journal: :Journal of cell science. Supplement 1993
D Brown I Sabolić

The plasma membrane composition of virtually all eukaryotic cells is maintained and continually modified by the recycling of specific protein and lipid components. In the kidney collecting duct, urinary acidification and urinary concentration are physiologically regulated at the cellular level by the shuttling of proton pumps and water channels between intracellular vesicles and the plasma memb...

Journal: :journal of medical microbiology and infectious diseases 0
abolghasem tohidpour department of medical bacteriology, school of medical sciences, tarbiat modares university, tehran, iran shahin najar peerayeh department of medical bacteriology, school of medical sciences, tarbiat modares university, tehran, iran sarah najafi pharmaceutical incubator centers, tehran university of medical sciences, tehran, iran

target modification and reduced drug accumulation are the main resistance mechanisms against fluoroquinolone antibiotics in pseudomonas aeruginosa. we performed a genotypic characterization of three major mex multidrug efflux pumps (mexab-oprm, mexxy-oprm and mexcd-oprj) in ciprofloxacin resistant clinical isolates of p. aeru­ginosa, collected from tehran, iran this was followed by sequencing a...

Journal: :Chemical Industry & Chemical Engineering Quarterly 2023

The present work aims to retrofit an existing Egyptian oilfield plant improve desalter performance and reduce the power of crude oil shipping pumps. In this work, waste heat in disposed water that represents a value is used heating brackish injected over before shipping. ASPEN HYSYS version 11 simulation software was used. considered based on implementation two new exchangers recover water. res...

Journal: :Biophysical journal 2004
Dmitry A Cherepanov Wolfgang Junge Armen Y Mulkidjanian

Crossing the membrane/water interface is an indispensable step in the transmembrane proton transfer. Elsewhere we have shown that the low dielectric permittivity of the surface water gives rise to a potential barrier for ions, so that the surface pH can deviate from that in the bulk water at steady operation of proton pumps. Here we addressed the retardation in the pulsed proton transfer across...

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