نتایج جستجو برای: macroporous weak acid resin mwar

تعداد نتایج: 909449  

Journal: :Molecules 2010
Zengjie Cui Kecheng Zhang Gaimei She Yinni Lin Lei Sun Yan Cheng Beibei Tan

The aim of this study was to evaluate the antimicrobial activity of Wuyiencin fractions with different polarities against six indicator microorganisms: Rhodotorula rubra, Bacillus subtilis, Bacillus megaterium, Escherichia coli, Cladosporium fulvum and Staphylococcus aureus. The fermentation broth of Wuyiencin was submitted to AB-8 macroporous adsorptive resin and fractionated with solvents of ...

Journal: :Molecules 2017
Sha-Sha Li Ke-Ke Li Fei Xu Li Tao Li Yang Shu-Xiao Chen Xiao-Jie Gong

The present study was designed to simultaneously isolate the less polar ginsenosides from the flower buds of Panax ginseng (FBPG). Five ginsenosides, including a pair of new 20-methoxyl isomers, were extracted from FBPG and purified through a five-step integrated strategy, by combining ultrasonic extraction, Diaion Hp-20 macroporous resin column enrichment, solid phase extraction (SPE), reverse...

Journal: :Dental materials journal 2002
Kiyoshi Kakuta Somchai Urapepon Yukio Miyagawa Hideo Ogura Masahiko Yamanaka Chatcharee Suchatlampong Apiwat Rittapai

The flexural strength and flexural modulus of an experimental metal-resin composite, which used Ag-In alloy particle as the filler, were evaluated. The effect of acid treatment and heat treatment on the Ag-In alloy particle was investigated. The flexural strength of the experimental metal-resin composites ranged from 65.5 MPa to 91.0 MPa. The flexural strength of the metal-resin composite incre...

Journal: :Processes 2021

Oil palm leaves (OPL) containing flavonoid C-glycosides are abundantly generated as oil byproducts. The performances of three macroporous resins with different physical and chemical properties for the enrichment isoorientin, orientin, vitexin, isovitexin from acid-hydrolyzed OPL (OPLAH) extract were screened. XAD7HP resin exhibited best sorption capacities targeted was thus selected further eva...

Journal: :Nanoscale 2013
Jiale Ren Yifu Yu Fangfang Dai Ming Meng Jing Zhang Lirong Zheng Tiandou Hu

Herein, we introduce a specially designed domain-confined macroporous catalyst, namely, the Co3O4 nanocrystals anchored on a TiO2 nanotube array catalyst, which was synthesized by using the mercaptoacetic acid induced surface-grafting method. This catalyst exhibits much better performance for catalytic soot combustion than the conventional TiO2 powder supported one in gravitational contact mode...

Journal: :Biomaterials 2005
Stéphane G Lévesque Ryan M Lim Molly S Shoichet

Dextran hydrogels have been studied as drug delivery vehicles but not as scaffolds for tissue-engineering likely because previously synthesized dextran hydrogels had pores too small for cell penetration. Our goal was to create macroporous, interconnected dextran scaffolds. To this end, we took advantage of the liquid-liquid immiscibility of poly(ethylene glycol) and methacrylated dextran during...

Journal: :Biomacromolecules 2008
Bo Chen Jun Hu Elizabeth M Miller Wenchun Xie Minmin Cai Richard A Gross

Candida antarctica Lipase B (CALB) was covalently immobilized onto epoxy-activated macroporous poly(methyl methacrylate) Amberzyme beads (235 microm particle size, 220 A pore size) and nanoparticles (nanoPSG, diameter 68 nm) with a poly(glycidyl methacrylate) outer region. Amberzyme beads allowed CALB loading up to 0.16 g of enzyme per gram of support. IR microspectroscopy generated images of A...

2012
Mohamed H. Mohamed Lee D. Wilson

In this review, the preparation of porous copolymer resin (PCR) materials via suspension polymerization with variable properties are described by tuning the polymerization reaction, using solvents which act as porogens, to yield microporous, mesoporous, and macroporous materials. The porogenic properties of solvents are related to traditional solubility parameters which yield significant change...

Journal: :Journal of dentistry 2005
Manuel Toledano Raquel Osorio Estrella Osorio Carlo Prati Ricardo M Carvalho

OBJECTIVE The aim is to determine if superficial or deep dentine microhardness (MH) is affected by different chemical dentine pre-treatments performed for resin bonding. METHODS Dentine discs of superficial (SD) and deep dentine (DD) were obtained by transversally sectioning the crowns of human third molars. Knoop MH was measured after different treatments: (1) polished up to 4000 grit, (2) p...

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