نتایج جستجو برای: covalent bulk polymerization

تعداد نتایج: 123703  

Journal: :international journal of occupational hygiene 0
mohsen rahiminezhad department of occupational health, school of public health, tehran university of medical sciences, tehran, iran seyed jamaleddin shahtaheri department of occupational health, school of public health, center for environmental research, tehran university of medical sciences, tehran, iran mohammad reza ganjali 3center of excellence in electrochemistry, endocrine & metabolism research center, tehran university of medical sciences, tehran, iran ali-reza koohpaei department of occupational health, qom university of medical sciences, qom, iran. abbas rahimi forushani department of biostatistics, school of public health, tehran university of medical sciences, tehran farideh golbabaei department of occupational health, school of public health, tehran university of medical sciences, tehran, iran

this study describes the synthesis of molecularly imprinted polymers (mips) by using an anti-che ops, namely dursban, as a template. non-covalent bulk polymerization was successfully applied to synthesis different imprinted and non-imprinted polymers with maa, mma, aa, and 4-vpy as monomer in selected porogens (chloroform, toluene, and acetonitrile). in order to evaluate the template binding of...

Journal: :The Journal of clinical investigation 1989
S L Smith R B Jennett M F Sorrell D J Tuma

Acetaldehyde is known to form covalent adducts with tubulin and to inhibit microtubule formation. Available evidence indicates that lysine residues are prominently involved in adduct formation. Previous work has shown that lysines on tubulin can be divided into two general classes based upon their reactivity toward acetaldehyde; those of normal reactivity ("bulk" lysines) and a highly reactive ...

Journal: :international journal of nano dimension 0
s. jalili department of chemistry, k. n. toosi university of technology,tehran, iran. computational physical sciences research laboratory, department of nano-science, institute for studies in theoretical physics and mathematics (ipm),tehran, iran r. vaziri department of chemistry, k. n. toosi university of technology,tehran, iran.

first principle calculations were performed using density functional theory within the local spin density approximation (lsda) to understand the electronic properties of au(100)+tbt system and compare the results with au(100) and bulk au properties. band structure, the total dos and charge density for these materials are calculated. we found that the homo for au(100)+tbt becomes broader than au...

R. Vaziri, S. Jalili

First principle calculations were performed using Density functional theory within the local spin density approximation (LSDA) to understand the electronic properties of Au(100)+TBT system and compare the results with Au(100) and bulk Au properties. Band structure, the total DOS and charge density for these materials are calculated. We found that the HOMO for Au(100)+TBT becomes broader than Au...

R. Vaziri, S. Jalili

First principle calculations were performed using Density functional theory within the local spin density approximation (LSDA) to understand the electronic properties of Au(100)+TBT system and compare the results with Au(100) and bulk Au properties. Band structure, the total DOS and charge density for these materials are calculated. We found that the HOMO for Au(100)+TBT becomes broader than Au...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2004
hedayatollah ghourchian ahmad moulaie rad hossein elyasvandi

urease was immobilized on platinum electrode both by chemical binding and electropolymerization.the conductometric urea biosensor thus prepared showed a detection limit of 4.9×10-5 m and linear dynamic range from 4.9×10-5 to 5.8×10-3 m for urea concentration when the enzyme is covalently immobilized on pt electrodes. conductometric transducers respond to the changes in ionic strength thereby le...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Oren A Scherman G B W L Ligthart Haruki Ohkawa Rint P Sijbesma E W Meijer

We show that combining concepts generally used in covalent organic synthesis such as retrosynthetic analysis and the use of protecting groups, and applying them to the self-assembly of polymeric building blocks in multiple steps, results in a powerful strategy for the self-assembly of dynamic materials with a high level of architectural control. We present a highly efficient synthesis of bifunc...

Journal: :Chemical communications 2014
Johanna Eichhorn Thomas Strunskus Atena Rastgoo-Lahrood Debabrata Samanta Michael Schmittel Markus Lackinger

The role of organometallic intermediates during on-surface polymerization via Ullmann coupling was studied on Ag(111). The polymerization progress was monitored by X-ray photoelectron spectroscopy (XPS). Scanning Tunneling Microscopy (STM) was used to characterize organometallic and covalent networks and to identify the temperature regimes for organometallic and covalent bond formation.

A. Ghassemi, A. Najafi, A. Nakhostin, F. Ameri, F. Raoufinejad, H. Norouzi, M. Abdo Tabrizi,

Objective: Bulk-fill composites are a group of composite resins designed for easy and fast filling of large cavities. This study aimed to assess the color stability of bulk-fill composites subjected to xenon radiation and evaluate their color change (&DeltaE) following polymerization. Methods: In this in vitro experimental study, 30 specimens (4mm in height and 8mm in diameter) were fabricat...

Journal: :journal of dental school, shahid beheshti university of medical sciences 0
f. ameri dept. of color physics, institute for color science and technology, tehran, iran. m. abdo tabrizi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. a. ghassemi dept. of restorative dentistry, dental research center, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. a. najafi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran. a. nakhostin dept. of restorative dentistry, school of dentistry, arak university of medical sciences, arak, iran. h. norouzi dept. of restorative dentistry, school of dentistry, shahid beheshti university of medical sciences, tehran, iran.

objective: bulk-fill composites are a group of composite resins designed for easy and fast filling of large cavities. this study aimed to assess the color stability of bulk-fill composites subjected to xenon radiation and evaluate their color change (&deltae;) following polymerization. methods: in this in vitro experimental study, 30 specimens (4mm in height and 8mm in diameter) were fabricated...

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