نتایج جستجو برای: polycarbonate

تعداد نتایج: 2649  

Journal: :The European Physical Journal B 2000

Journal: :Europhysics Letters (EPL) 2005

Journal: :Chemical and Biochemical Engineering Quarterly 2018

Journal: :Environmental science. Nano 2023

Polycarbonate photodegradation products, namely nanoplastics and molecular by-products, are formed in a single step. Studying their effects suitable hepatic model proves that both components induce toxicity toward hepatocellular functions.

Journal: :Microelectronics Journal 2004
Te-Hua Fang Win-Jin Chang

The nanoindentation experiment was carried out to estimate nanomechanical characteristics of polycarbonate polymer films. Hardness, effective elastic modulus and contact stress–strain rate curve were obtained. The results showed that the effective elastic modulus and the hardness decreased as the applied load was increased. As the hold time was increased, the effective elastic modulus and the h...

Journal: :Chemical communications 2008
Chayanant Hongfa Jianhua Tian Jeremy Andreatta Donald J Darensbourg David E Bergbreiter

Polyisobutylene is shown to be a nonpolar phase tag that separates a highly colored salen Cr(III) complex from products but is otherwise kinetically similar to a low molecular weight salen Cr(III) complex in polycarbonate formation by Cr(III)-catalyzed copolymerization of CO2 and cyclohexene oxide.

Journal: :European journal of orthodontics 2008
Enver Morina Theodore Eliades Nikolaos Pandis Andreas Jäger Christoph Bourauel

The purpose of this research was to investigate the torque capacity of active and passive self-ligating brackets compared with metallic, ceramic, and polycarbonate edgewise brackets. Six types of orthodontic brackets were included in the study: the self-ligating Speed and Damon2, the stainless steel (SS), Ultratrimm and Discovery, the ceramic bracket, Fascination 2, and the polycarbonate bracke...

Journal: :Food additives and contaminants 2003
C Brede P Fjeldal I Skjevrak H Herikstad

Baby bottles are often made of polycarbonate plastic. Impurities remaining in the bottle from the monomer bisphenol A can migrate from the plastic bottles into baby food, thereby causing a health concern. Previous migration testing of new baby bottles showed only trace migration levels of the substance. In the present work, polycarbonate baby bottles were subjected to simulated use by dishwashi...

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