نتایج جستجو برای: chemical operation

تعداد نتایج: 584268  

2012
Kui Qian Aiguo Song Jiatong Bao Huatao Zhang

In order to meet the actual requirements of nuclear radiation and chemical leak detection, and emergency response, a new small teleoperated robot for nuclear radiation and chemical detection is proposed. A small‐size robot is manufactured according to technical requirements and the overall structure and control system is described. Meanwhile, based on the ...

Journal: :Journal of colloid and interface science 2015
Katerina Voitko Ajna Tóth Evgenij Demianenko Gábor Dobos Barbara Berke Olga Bakalinska Anatolij Grebenyuk Etelka Tombácz Volodymyr Kuts Yurij Tarasenko Mykola Kartel Krisztina László

The catalytic performance of multi-walled carbon nanotubes (MWCNTs) with different surface chemistry was studied in the decomposition reaction of H2O2 at various values of pH and temperature. A comparative analysis of experimental and quantum chemical calculation results is given. It has been shown that both the lowest calculated activation energy (∼18.9 kJ/mol) and the highest rate constant co...

2015
Yuya Kitaguchi Satoru Habuka Hiroshi Okuyama Shinichiro Hatta Tetsuya Aruga Thomas Frederiksen Magnus Paulsson Hiromu Ueba

Mechanical methods for single-molecule control have potential for wide application in nanodevices and machines. Here we demonstrate the operation of a single-molecule switch made functional by the motion of a phenyl ring, analogous to the lever in a conventional toggle switch. The switch can be actuated by dual triggers, either by a voltage pulse or by displacement of the electrode, and electro...

2008
Martina O'Toole Dermot Diamond

The ever increasing demand for in situ monitoring of health, environment and security has created a need for reliable, miniaturised sensing devices. To achieve this, appropriate analytical devices are required that possess operating characteristics of reliability, low power consumption, low cost, autonomous operation capability and compatibility with wireless communications systems. The use of ...

Journal: :Journal of chemical information and computer sciences 2004
Joachim Braun Ralf Gugisch Adalbert Kerber Reinhard Laue Markus Meringer Christoph Rücker

The MOLGEN Chemical Identifier MOLGEN-CID is a software module freely accessible via the Internet. For a molecule or graph entered in molfile format (2D) it produces, by a canonical renumbering procedure, a canonical molfile and a unique character string that is easily compared by computer to a similar string. The mode of operation of MOLGEN-CID is detailed and visualized with examples.

2014
Thoru Pederson John F. Marko

The nucleus is physically distinct from the cytoplasm in ways that suggest new ideas and approaches for interrogating the operation of this organelle. Chemical bond formation and breakage underlie the lives of cells, but as this special issue of Molecular Biology of the Cell attests, the nonchemical aspects of cell nuclei present a new frontier to biologists and biophysicists.

2015
Ross Edward. Swaney Ignacio E. Grossmann

One of the key components of chemical plant operability is flexibility the ability to operate over a range of conditions while satisfying performance specifications. A general framework for analyzing flexibility in chemical process design is presented in this paper. A quantitative index is proposed which measures the size of the parameter space over which feasible steady-state operation of the ...

2011

Tubes are a vital component of most structures, especially in the power, and oil and gas industries. Tube failure, especially in the nuclear and chemical industries, can have catastrophic effects with irreversible environmental and ecological damage. The notable Chernobyl nuclear accident in the Soviet Union has made the public extremely sensitive and concerned about the safety of nuclear plant...

2013
G. A. Mun

The feasibility of heat engines, coupled with an internal combustion engine and designed to increase the coefficient of efficiency of hydrocarbon or other chemical fuels, was considered. The prospects of the use of osmotic phenomena in aqueous solutions of thermosensitive polymers in order to improve the operation of heat engines were shown.

Journal: :Chemical research in toxicology 2009
Kent S Gates

The sequence of heterocyclic bases on the interior of the DNA double helix constitutes the genetic code that drives the operation of all living organisms. With this said, it is not surprising that chemical modification of cellular DNA can have profound biological consequences. Therefore, the organic chemistry of DNA damage is fundamentally important to diverse fields including medicinal chemist...

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