نتایج جستجو برای: base metal

تعداد نتایج: 448699  

The Gandy gold-base metal deposit is located in Tertiary Torud-Chahshirin volcano-plutonic range, north of Central Iran. Various styles of gold mineralization occur throughout the range. Mineralization at Gandy occurs in close spatial relation with rhyolitic domes in a caldera setting in a series of narrow brecciated veins. Two mineralogically and spatially different argillic alterations have a...

Sabokrouh, M., Saroghi, M.,

High strength low alloy steels are widely used in gas industry, so shield metal arc welding in pipelines to transport natural gas from Iran is of great importance. For experimental investigation of seam weld and integrity of girth weld, destructive and non-destructive tests are required. In this article the effects of normal heat treatment on properties of multi pass welding in different situat...

ژورنال: مجله دندانپزشکی 2001
گرامی پناه, فریده ,

The formation of oxides on the surface of the metal are proven to contribute to the formation of strong bonding. However, The base metal alloys are expected to exhibit more oxidation than high gold alloys, increase in oxide layer thickness due to repeated firing in them can reduce the bond strength. The aim of this study was to compare the effect of repeated porcelain firing on the bond strengt...

Journal: :Chemical communications 2011
Kristof Seubert Célia Fonseca Guerra F Matthias Bickelhaupt Jens Müller

DNA double helices comprising chimeric GNA/DNA metal-mediated base pairs have been synthesized and characterized (GNA = glycol nucleic acid). The possibility to combine different nucleic acid backbones within one metal-mediated base pair expands the applicability of metal-functionalized nucleic acids.

2015
Kaneyoshi Yoshida Yutaka Takahashi Ippei Hamanaka Tomohiro Kawaguchi Hirono Sasaki Hiroshi Shimizu

Objective: This study evaluated the reinforcing effect of glass fiber-reinforced composite (FRC) reinforcement on flexural strength at the proportional limit (FS-PL) of a repaired denture base resin. Materials and methods: Repaired denture base resins reinforced with metal and with FRC reinforcement, and that without reinforcement were tested. The ultimate flexural strength, the FS-PL and the e...

ژورنال: مجله دندانپزشکی 2007
سیادت, حکیمه , علی خاصی, مرضیه , محمد علیزاده, محسن , میرفضائلیان, علی ,

Background and Aim: An important criterion for success assessment of implant-supported prostheses is marginal fit. Vertical and horizontal discrepancy can result in loosening of the prosthetic screw, crestal bone resorption, peri-implantitis and loss of osseointegration. Despite careful attention to waxing, investing, and casting, marginal discrepancies are inevitable. The aim of this study was...

2016
Lisheng Gao Hanzheng Guo Shujun Zhang Clive A. Randall Delbert Tesar

Piezoelectrics have been widely used in different kinds of applications, from the automobile industry to consumer electronics. The novel multilayer piezoelectrics, which are inspired by multilayer ceramic capacitors, not only minimize the size of the functional parts, but also maximize energy efficiency. Development of multilayer piezoelectric devices is at a significant crossroads on the way t...

2013
Tuncer Burak Ozcelik Burak Yilmaz

Metal ceramic partial fixed dental prostheses have been commonly used for the replacement of missing teeth for many years. Because of an increase in the price of gold, base metal alloys have been the choice of alloy for the fabrication of metal ceramic restorations in many dental clinics. Some major disadvantages of base metals are their corrosion and the dark coloration they may cause at the c...

Journal: :Organic & biomolecular chemistry 2017
Pascal Röthlisberger Fabienne Levi-Acobas Ivo Sarac Philippe Marlière Piet Herdewijn Marcel Hollenstein

The expansion of the genetic alphabet with an additional, artificial base pair is of high relevance for numerous applications in synthetic biology. The enzymatic construction of metal base pairs is an alluring strategy that would ensure orthogonality to canonical nucleic acids. So far, very little is known on the enzymatic fabrication of metal base pairs. Here, we report on the synthesis and th...

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