نتایج جستجو برای: gold and silver

تعداد نتایج: 16853666  

2016
Adrien Chauvin Cyril Delacôte Mohammed Boujtita Benoit Angleraud Junjun Ding Chang-Hwan Choi Pierre-Yves Tessier Abdel-Aziz El Mel

We report on a novel fabrication approach of metal nanowires with complex surface. Taking advantage of nodular growth triggered by the presence of surface defects created intentionally on the substrate as well as the high tilt angle between the magnetron source axis and the normal to the substrate, metal nanowires containing hillocks emerging out of the surface can be created. The approach is d...

Journal: :Sustainability 2021

This study aimed to assess the impact of a four-point bonus system on recertification in Leadership Energy and Environmental Design for Existing Buildings (LEED-EB) 2009 office space projects four metropolitan cities: Washington, DC, Chicago, New York, San Francisco. We analyzed 123 paired LEED-EB where each pair (i.e., certification–recertification) was used same building. The percentage avera...

Journal: :The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society 2011
Endre Dobó Virág T Takács Attila I Gulyás Gábor Nyiri András Mihály Tamás F Freund

The available methods for double-labeling preembedding immunoelectron microscopy are highly limited because not only should the ultrastructure be preserved, but also the different antigens should be visualized by reaction end products that can be clearly distinguished in gray-scale images. In these procedures, one antigen is detected with 3,3'-diaminobenzidine (DAB) chromogen, resulting in a ho...

Journal: :Nanoscale 2014
Gianvito Vilé Javier Pérez-Ramírez

We report on the excellent stereo and chemoselectivity of nanosized silver and gold catalysts in the three-phase hydrogenation of acetylenic compounds under flow chemistry conditions. The materials featuring metal nanoparticles in the range of 2-21 nm were prepared by spray deposition or incipient wetness impregnation of silver nitrate and sol immobilisation of gold chloride on different carrie...

2015
Gabriela Figueroa Jesus L. Valenzuela Jose R. Parga Victor Vazquez Alejandro Valenzuela

Over the past decade the concern about toxic metals in freshwater has increased. Environmental laws such as the Clean Water Act have forced industries that produce metal containing wastewater to treat their wastewater prior to discharge. The purpose of this study was to investigate the use of a novel method for the minimization of heavy metals in the wastewater from the mining industry. A very ...

2012
Jana Ficeriová Peter Baláž Eberhard Gock

Au-Ag noble metal wastes represent a wide range of waste types and forms, with various accompanying metallic elements. The presented leaching strategy for Au-Ag contained in circuit boards (PCBs) aims at gaining gold and silver in the metallic form. Application of the proposed ammonium thiosulphate leaching process for the treatment of the above mentioned Au-Ag containing wastes represents a pr...

2012
Ian Lewin Şenay Kafkas Dietrich Rebholz-Schuhmann

Motivation: Gold Standards for named entities are, ironically, not standard themselves. Some specify the “one perfect annotation”. Others specify “perfectly good alternatives”. The concept of Silver standard is relatively new. The objective is consensus rather than perfection. How should the two concepts be best represented and related? Approach: We examine several Biomedical Gold Standards and...

Journal: :Nanoscale 2013
Hai-nan Xie Iain A Larmour Yi-Chieh Chen Alastair W Wark Vasiliki Tileli David W McComb Karen Faulds Duncan Graham

Optical analysis in the near infrared region is of significant biological importance due to better tissue penetration and reduced autofluorescence. In this work, an improved synthesis of hollow gold nanospheres (HGNs), which provides a tunable localized surface plasmon resonance (LSPR) from 610 nm up to 1320 nm, is demonstrated. The scattering properties of these nanoparticles are shown using s...

2001
Anthony N. van den Pol

Silver-intensified gold (SIG) particles were used for lightand electron-microscopic immunocytochemical localization of neuronal antigens, and the SIG method was compared with related heavy-metal methods for the purpose of dual ultrastructural localization of neurotransmitter-related antigens. SIG immunostaining was combined with peroxidase immunostaining to allow simultaneous study of different...

2005
PAUL W. JEWELL W. T. PARRY

The term "Carlin-type" deposit has been applied to a number of low-grade, sedimentary rock-hosted gold deposits that have been discovered and brought into production in the western United States since the 1960s. Carlin-type deposits are characterized by replacement of carbonate and silty carbonate rocks by silica, pyrite, barite, various arsenic, mercury, antimony, and thallium minerals and by ...

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