نتایج جستجو برای: diethyl fumarate (def)

تعداد نتایج: 14596  

Journal: :iranian journal of radiation research 0
m. kattan atomic energy commission of syria, department of radiation technology,accuracy of measurements division, p.o. box 6091, damascus, syria h. alkassiri atomic energy commission of syria, department of radiation technology,accuracy of measurements division, p.o. box 6091, damascus, syria y. daher atomic energy commission of syria, department of radiation technology,accuracy of measurements division, p.o. box 6091, damascus, syria

background: dosimetry is a fundamental part of the radiation processing industry. aqueous inorganic dosimeters have been used for gamma radiation dosimetry such as standard ferrous sulfate dosimeter. the purpose of this study was to investigate the effect of gamma radiation on the diethyl fumarate def in dimethyl sulfoxide dmso solution and its possible use in chemical dosimetry. materials and ...

H. Alkassiri, M. Kattan, Y. Daher,

Background: Dosimetry is a fundamental part of the radiation processing industry. Aqueous inorganic dosimeters have been used for gamma radiation dosimetry such as standard ferrous sulfate dosimeter. The purpose of this study was to investigate the effect of gamma radiation on the diethyl fumarate DEF in dimethyl sulfoxide DMSO solution and its possible use in chemical dosimetry. Materials and ...

Journal: :Contact dermatitis 2010
Kaija Lammintausta Erik Zimerson Sandra Winhoven Päivikki Susitaival Taina Hasan Birgitta Gruvberger Jason Williams Michael Beck Magnus Bruze

BACKGROUND Chairs and sofas imported from China to Europe were shown to contain dimethyl fumarate (DMF), a sensitizing, volatile chemical. Many of the sensitized patients also had positive patch test reactions to acrylates. OBJECTIVES To analyse the occurrence and strength of DMF sensitization and the appearance of concomitant reactions. METHODS Patch testing with DMF in concentrations of 0...

2012
S. Beke F. Anjum H. Tsushima L. Ceseracciu E. Chieregatti A. Diaspro A. Athanassiou F. Brandi

We demonstrate high-resolution photocross-linking of biodegradable poly(propylene fumarate) (PPF) and diethyl fumarate (DEF) using UV excimer laser photocuring at 308 nm. The curing depth can be tuned in a micrometre range by adjusting the total energy dose (total fluence). Young's moduli of the scaffolds are found to be a few gigapascal, high enough to support bone formation. The results prese...

Journal: :Organic & biomolecular chemistry 2010
Pattama Saisaha Dirk Pijper Ruben P van Summeren Rob Hoen Christian Smit Johannes W de Boer Ronald Hage Paul L Alsters Ben L Feringa Wesley R Browne

A practical method for the multigram scale selective cis-dihydroxylation of electron deficient alkenes such as diethyl fumarate and N-alkyl and N-aryl-maleimides using H(2)O(2) is described. High turnovers (>1000) can be achieved with this efficient manganese based catalyst system, prepared in situ from a manganese salt, pyridine-2-carboxylic acid, a ketone and a base, under ambient conditions....

2014
Ju-Yi Hsieh Jyung-Hurng Liu Pai-Chun Yang Chi-Li Lin Guang-Yaw Liu Hui-Chih Hung

Human mitochondrial NAD(P)+-dependent malic enzyme (m-NAD(P)-ME) is allosterically activated by the four-carbon trans dicarboxylic acid, fumarate. Previous studies have suggested that the dicarboxylic acid in a trans conformation around the carbon-carbon double bond is required for the allosteric activation of the enzyme. In this paper, the allosteric effects of fumarate analogs on m-NAD(P)-ME ...

Journal: :Journal of the American Chemical Society 2006
Dennis G H Hetterscheid Coen Hendriksen Wojciech I Dzik Jan M M Smits Ernst R H van Eck Alan E Rowan Vincenzo Busico Michele Vacatello Valeria Van Axel Castelli Annalaura Segre Erica Jellema Tom G Bloemberg Bas de Bruin

Unprecedented rhodium-catalyzed stereoselective polymerization of "carbenes" from ethyl diazoacetate (EDA) to give high molecular mass poly(ethyl 2-ylidene-acetate) is described. The mononuclear, neutral [(N,O-ligand)M(I)(cod)] (M = Rh, Ir) catalytic precursors for this reaction are characterized by (among others) single-crystal X-ray diffraction. These species mediate formation of a new type o...

Journal: :Journal of Polymer Science Part A-1: Polymer Chemistry 1970

Journal: :ACS Sustainable Chemistry & Engineering 2021

Grafting novel and nature-inspired phenolic esters onto cellulose nanocrystals (CNCs) provides nanofibers with excellent protection against UV radiation when incorporated into a polymer matrix. In this work, CNCs decorated UV-absorbing diester (CNC-diethyl ferulate or CNC-DEF) obtained via click-type copper-catalyzed azide/alkyne cycloaddition reaction were polyvinyl alcohol (PVA) matrix to pro...

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