نتایج جستجو برای: bar metal

تعداد نتایج: 226489  

Journal: :Journal of Neurosciences in Rural Practice 2012

Journal: :Journal of the American Chemical Society 2011
Zoey R Herm Joseph A Swisher Berend Smit Rajamani Krishna Jeffrey R Long

Selected metal-organic frameworks exhibiting representative properties--high surface area, structural flexibility, or the presence of open metal cation sites--were tested for utility in the separation of CO(2) from H(2) via pressure swing adsorption. Single-component CO(2) and H(2) adsorption isotherms were measured at 313 K and pressures up to 40 bar for Zn(4)O(BTB)(2) (MOF-177, BTB(3-) = 1,3,...

Journal: :Bioscience, biotechnology, and biochemistry 2005
Atsunori Negishi Tadashi Muraoka Terunobu Maeda Fumiaki Takeuchi Tadayoshi Kanao Kazuo Kamimura Tsuyoshi Sugio

Growth of five strains of sulfur-oxidizing bacteria Acidithiobacillus thiooxidans, including strain NB1-3, was inhibited completely by 50 microM of sodium tungstate (Na(2)WO(4)). When the cells of NB1-3 were incubated in 0.1 M beta-alanine-SO(4)(2-) buffer (pH 3.0) with 100 microM Na(2)WO(4) for 1 h, the amount of tungsten bound to the cells was 33 microg/mg protein. Approximately 10 times more...

2009
R. Hofman P. J. Gellings

Silica coatings have been deposited on various alloys by MOCVD (Metal Organic Chemical Vapor Deposition) to protect them against high temperature corrosion in coal gasification environments. DiAcetoxyDitertialyButoxySilane (DADBS) has been used as a metal organic precursor at deposition temperatures between 773 873 "K and amorphous layers were produced with a growth rate of about 1 pm. h-'. The...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2014
mansoor anbia vahid hoseini sakineh mandegarzad elahe motaee sara sheykhi

mil-53-cu has been synthesized hydrothermally and has been used for the first time for gas separation. mil-53-cu shows adsorption capacities of 8.1, 0.7 and 0.5 m.mol/g, respectively, for ch4, co2 and h2 at 30 bar and 298 k. the high ch4 adsorption capacity of mil-53-cu maybe attributed to the high pore volume and large number of open metal sites. the high selectivity for ch4 over co2 (11.5) an...

2014
A. Erman Tekkaya Sami Chatti

Introduction Bar extrusion is a process in which a block of metal (billet) is forced to flow by compression through a tool (die) opening of a smaller crosssectional area than that of the original billet. There are two basic types of bar extrusion: direct and indirect. The most important and common method used is the direct extrusion (Lange 1988). Figure 1 shows the principle of direct bar extru...

2016
Young Jo Sa Jongho Lee Jin Yong Jeong Moonhee Choi Soo Seog Park Sung Bo Sim Keon Hyon Jo

BACKGROUND Bar displacement is one of the most common and serious complications after the Nuss procedure. However, measurements of and factors affecting bar displacement have not been reported. The objectives of this study were to develop a decision model to guide surgeons considering repeat treatment and to estimate optimal cut-off values to determine whether reoperation to correct bar displac...

2014
Stefano Betti Gastone Ciuti Leonardo Ricotti Marco Ghionzoli Filippo Cavallo Antonio Messineo Arianna Menciassi

Pectus Excavatum is an anatomical deformation characterized by a depression of the anterior chest wall. Nuss technique (representing the current clinical golden standard) consists in the introduction of a corrective metal bar, in order to raise the sternum in its anatomic natural position. Nowadays, the bar plays purely a mechanical/corrective action and is kept implanted for about three years,...

2014
Felipe Gándara Hiroyasu Furukawa Seungkyu Lee Omar M. Yaghi

The use of porous materials to store natural gas in vehicles requires large amounts of methane per unit of volume. Here we report the synthesis, crystal structure and methane adsorption properties of two new aluminum metal-organic frameworks, MOF-519 and MOF-520. Both materials exhibit permanent porosity and high methane volumetric storage capacity: MOF-519 has a volumetric capacity of 200 and ...

2013
Yichao Lin Qiuju Yan Chunlong Kong Liang Chen

A series of polyethyleneimine (PEI) incorporated MIL-101 adsorbents with different PEI loadings were reported for the first time in the present work. Although the surface area and pore volume of MIL-101 decreased significantly after loading PEI, all the resulting composites exhibited dramatically enhanced CO2 adsorption capacity at low pressures. At 100 wt% PEI loading, the CO2 adsorption capac...

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