نتایج جستجو برای: pt

تعداد نتایج: 46502  

Journal: :Dalton transactions 2008
Hai-Bing Xu Li-Yi Zhang Zhong-Hui Chen Lin-Xi Shi Zhong-Ning Chen

Reactions of 5-[2-(trimethylsilyl)-1-ethynyl]-2,2'-bipyridine (Me3SiC-Cbpy) with Pt(bpy)C12 (bpy = 2,2'-bipyridine) and Pt(bpyC[triple bond]C-C[triple bond]Cbpy)Cl2 (bpyC[triple bond]C-C[triple bond]Cbpy=bis(2,2'-bipyridin-5-yl)butadiyne) induced isolation of Pt(bpy)(C[triple bond]Cbpy)2 (1) and Pt(bpyC[triple bond]C-C[triple bond]Cbpy)(C[triple bond]Cbpy)2 (5), respectively. Incorporating Ln(h...

2016
Wenxian Lan Zhongpei Hu Jie Shen Chunxi Wang Feng Jiang Huili Liu Dewu Long Maili Liu Chunyang Cao

DNA phosphorothioate (PT) modification, with sulfur replacing a nonbridging phosphate oxygen in a sequence and stereo specific manner, is a novel physiological variation in bacteria. But what effects on DNA properties PT modification has is still unclear. To address this, we prepared three double-stranded (ds) DNA decamers, d(CG(PX)GCCGCCGA) with its complementary strand d(TCGGCG(PX)GCCG) (wher...

Journal: :The journal of physical chemistry. B 2005
Soonhyun Kim Seong-Ju Hwang Wonyong Choi

Platinum-ion-doped TiO2 (Pt(ion)-TiO2) was synthesized by a sol-gel method, and its visible light photocatalytic activities were successfully demonstrated for the oxidative and reductive degradation of chlorinated organic compounds. Pt(ion)-TiO2 exhibited a yellow-brown color, and its band gap was lower than that of undoped TiO2 by about 0.2 eV. The flat band potential of Pt(ion)-TiO2 was posit...

Journal: :iranian red crescent medical journal 0
ilker ilhanli department of physical medicine and rehabilitation, school of medicine, giresun university, giresun, turkey; department of physical medicine and rehabilitation, school of medicine, giresun university, giresun, turkey. tel: +90-4543101690, fax: +90-4543101699 necip guder physical medicine and rehabilitation state hospital, giresun, turkey murat gul department of statistics, faculty of science, giresun university, giresun, turkey

patients and methods seventy patients with chronic partial supraspinatus tears in magnetic resonance imaging were randomized into two groups; prp (n = 35) and pt (n = 35). before the treatment, at the end of the treatment and at the 12th month after the end of the treatment, range of motion (rom), visual analog scale (vas) for pain, disabilities of arm, shoulder and hand questionnaire (dash), n...

Journal: :Nanoscale 2014
Hee-Jeong Jang Soonchang Hong Songyi Ham Kevin L Shuford Sungho Park

In this report, we tune the surface plasmonic behavior of Au nanoplates depending on the morphology of the Pt shell in which Pt is considered as a less optically inactive element. We describe the synthesis of flat Au nanoplates coated with Pt via rim-preferential or uniform growth methods. Depending on the site-selective growth of Pt on core Au nanoplates, the aspect ratio of the resulting Au@P...

Journal: :Dalton transactions 2014
Longhui Nie Yingqiu Zheng Jiaguo Yu

Pt/honeycomb ceramic (Pt/HC) catalysts with ultra-low Pt content (0.005-0.055 wt%) were for the first time prepared by an impregnation of honeycomb ceramics with Pt precursor and NaBH4-reduction combined method. The microstructures, morphologies and textural properties of the resulting samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), a...

2015
Laura Usón Victor Sebastian Alvaro Mayoral Jose L. Hueso Adela Eguizabal Manuel Arruebo Jesus Santamaria

Figure S1. STEM‐HAADF micrographs of Pt clusters. a) Pt clusters as prepared, b) Detail image of Pt clusters as prepared. It can be observed the nanocrystal lattice and a well‐crystallization. c) Particle size distribution of Pt clusters as prepared. d) and e) Pt clusters after an ageing process of 4 months. The clusters keep a well‐crystallized structured. f) Particle size distribution of Pt c...

2001
S. R. Brankovic J. X. Wang R. R. Adžić

A new method for the preparation of Pt-Ru and similar bimetallic electrocatalysts is reported. It involves a spontaneous deposition of Pt submonolayers on metallic Ru nanoparticles, which yields electrocatalysts with a considerably lower Pt loading and higher CO tolerance than the commercial Pt-Ru alloy electrocatalysts. The method offers a unique possibility to place the Pt atoms onto the surf...

2010
Han-Ik Joh Sang Joon Seo Hyun Tae Kim Sang Heup Moon

−Highly loaded and dispersed Pt/C catalysts, used as cathodic electrocatalysts in low temperature fuel cells, were prepared using a new method involving the slow addition of a Pt precursor to a solution containing dispersed carbon powder and a reducing agent. During this process, the added Pt precursor was reduced instantaneously into fine particles and adsorbed onto the carbon surface in the s...

2013
Manoel M. Bezerra-Neto Marcelo S. Ribeiro Biplab Sanyal Anders Bergman Roberto B. Muniz Olle Eriksson Angela B. Klautau

We present an approach to control the magnetic structure of adatoms adsorbed on a substrate having a high magnetic susceptibility. Using finite Ni-Pt and Fe-Pt nanowires and nanostructures on Pt(111) surfaces, our ab initio results show that it is possible to tune the exchange interaction and magnetic configuration of magnetic adatoms (Fe or Ni) by introducing different numbers of Pt atoms to l...

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