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580 Newest Publications about the topic pumps

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IJMS, Vol. 11, Pages 704-718: Molecular Design and Functional Control of Novel Self-Oscillating Polymers

10-Feb-2010 | Hara, Yusuke ; Maeda, Shingo ; Hashimoto, Shuji ; Yoshida, Ryo, International Journal of Molecular Sciences, 2010

If we could realize an autonomous polymer system driven under biological conditions by a tailor-made molecular design, human beings could create unprecedented biomimetic functions and materials such as heartbeats, autonomous peristaltic pumps, etc. In order to achieve this objective, we have ...

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Repairing and extending life of replacement steel parts of high-pressure oil and gas drilling pumps

25-Jan-2010 | E. Kh. Isakaev, V. B. Mordynskii, A. S. Tyuftyaev, Yu. M. Avilkin, V. A. Katarzhis, Chemical and Petroleum Engineering, 2010

Promising methods of strengthening fast-wearing friction couples of drilling pumps are described. Advantage of application of plasma-jet powder hard-facing for extending the service life of cylindrical bushings and valve systems is shown. The results of laboratory and industrial tests of ...

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Calculation of characteristics of variable-pitch worm

25-Jan-2010 | B. N. Zotov, Chemical and Petroleum Engineering, 2010

Performance of a variable-pitch worm (endless screw), like that of a positive-displacement pump operating with leaks (reverse flows), is analyzed. An examination has been made of the head characteristics of two modified versions of sectional variable-pitch worms: where one worm with a smaller and ...

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PRELIMINARY INVESTIGATION OF GALLIC ACID EXTRACTION FROM JATROPHA CURCAS LINN. LEAVES USING SUPERCRITICAL CARBON DIOXIDE WITH METHANOL CO‐SOLVENT

18-Nov-2009 | MANPONG, PATUMPORN; DOUGLAS, SUPAPORN; DOUGLAS, PETER L.; PONGAMPHAI, SUWASSA; TEPPAITOON, WITTAYA, Journal of Food Process Engineering, 2009

ABSTRACT The leaves of Jatropha curcas Linn. contain antioxidant, anticancer and anti‐HIV compounds. This research investigated the extraction of the phenolic compound, gallic acid (GA), from Jatropha curcas Linn. leaves using supercritical carbon dioxide (SCCO2) and methanol co‐solvent. The ...

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Investigation of nuclear-reactor friction units operating in heavy high-temperature liquid-metal heat carriers. Part 1. Experimental equipment

05-Nov-2009 | Yu. N. Drozdov, A. V. Beznosov, V. V. Makarov, V. N. Puchkov, M. A. Antonenkov, D. V. Kuznetsov, Journal of Friction and Wear, 2009

Experimental equipment designed for solving tribological problems arising in friction units operating in heavy liquid-metal heat carriers for nuclear-reactor circuits is discussed. In order to study fretting corrosion, a setup has been produced that simulates the wear of a fuel element in contact ...

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Multidrug Resistance in Bacteria

02-Jun-2009 | Hiroshi Nikaido, Annual Review of Biochemistry, 2009

Large amounts of antibiotics used for human therapy, as well as for farm animals and even for fish in aquaculture, resulted in the selection of pathogenic bacteria resistant to multiple drugs. Multidrug resistance in bacteria may be generated by one of two mechanisms. First, these bacteria may ...

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Multidrug Resistance in Bacteria

02-Jun-2009 | Hiroshi Nikaido, Annual Review of Biochemistry, 2009

Large amounts of antibiotics used for human therapy, as well as for farm animals and even for fish in aquaculture, resulted in the selection of pathogenic bacteria resistant to multiple drugs. Multidrug resistance in bacteria may be generated by one of two mechanisms. First, these bacteria may ...

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Multidrug Resistance in Bacteria

02-Jun-2009 | Hiroshi Nikaido, Annual Review of Biochemistry, 2009

Large amounts of antibiotics used for human therapy, as well as for farm animals and even for fish in aquaculture, resulted in the selection of pathogenic bacteria resistant to multiple drugs. Multidrug resistance in bacteria may be generated by one of two mechanisms. First, these bacteria may ...

more

Multidrug Resistance in Bacteria

02-Jun-2009 | Hiroshi Nikaido, Annual Review of Biochemistry, 2009

Large amounts of antibiotics used for human therapy, as well as for farm animals and even for fish in aquaculture, resulted in the selection of pathogenic bacteria resistant to multiple drugs. Multidrug resistance in bacteria may be generated by one of two mechanisms. First, these bacteria may ...

more

Evaluating quenchants and facilities for hardening steel

08-Apr-2008 | R. W. Monroe, C. E. Bates, Journal of Heat Treating, 2008

The effects of agitation and quenchant temperature on the ability of a fast oil, water, and a 16 pct solution of a polyglycol in water to remove heat from steel during quenching have been determined using instrumented probes and bars of known hardenability. The fast oil was relatively insensitive ...

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