نتایج جستجو برای: β cyclodextrin sulfuric acid

تعداد نتایج: 911766  

Journal: :Indian Journal of Pharmaceutical Education and Research 2021

Abstract: Introduction: Embelin, a phytoconstituent obtained from Embelia ribes of the Myrsinaceae family, has anti-cancer, anti-inflammatory, anti-bacterial, anti-fertility, analgesic, antidiabetic, anti-depressant and wound healing activities. It is hydrophobic in nature leading to low bioavailability. Aim: The present study aims improve water solubility rate dissolution Embelin by complexati...

Journal: :Applied biochemistry and biotechnology 2011
Jae-Won Lee J Y Zhu Danilo Scordia Thomas W Jeffries

In scale-up, the potential of ethanol production by dilute sulfuric acid pretreatment using corncob was investigated. Pretreatments were performed at 170 °C with various acid concentrations ranging from 0% to 1.656% based on oven dry weight. Following pretreatment, pretreated biomass yield ranged from 59% to 67%. More than 90% of xylan was removed at 0.828% of sulfuric acid. At same pretreatmen...

2008
Alicia Viviana Veglia

From the effect of β-cyclodextrin and hydroxypropyl-β-cyclodextrin on the UVvisible and fluorescence spectra of carbaryl and carbofuran, the values of association constants were determined. The ratio of the fluorescence quantum yields for the bound and free substrates indicated an enhanced fluorimetric method of detection.

Journal: :Chemical communications 2012
Xiao Mei Shun Yang Dongyun Chen Najun Li Hua Li Qingfeng Xu Jianfeng Ge Jianmei Lu

Hollow mesoporous silica nanoparticles (HMSs) were modified by β-cyclodextrin via a "click" reaction, an amphiphilic copolymer with a trans-azobenzene structure was then assembled onto β-cyclodextrin to cover the surface of the HMSs. The prepared nanocomposites can release drugs in a "release-stop-release" manner by converting light irradiation.

Journal: :Dalton transactions 2012
Sébastien Noël Bastien Léger Rudy Herbois Anne Ponchel Sébastien Tilloy Gerhard Wenz Eric Monflier

Rhodium(0) nanoparticles stabilized by a polymer containing carboxylate and β-cyclodextrin moieties have high stability and catalytic activity for aqueous hydrogenation reactions of olefins and aromatic substrates. This catalytic system can be recycled and reused without loss of activity. These high catalytic performances can be attributed to conjugated electrostatic interactions (carboxylate g...

Journal: :International Journal of Pharmaceutics 2020

2010
Pravin Nalawade Vilasrao Kadam Rajashree Hirlekar

This study presents improvement in solubility and dissolution rate of valsartan (VAL) using β-cyclodextrin (βCD) and hydroxypropyl-β-cyclodextrin (HP-βCD). Formation and characterization of solid inclusion complexes were investigated by DSC, FTIR, SEM, HNMR and in-vitro dissolution studies. Preparation method influenced physical properties of binary mixtures. Inclusion complexes obtained by co-...

2008
Rima Kassab Noha Ghanem Paolo Yammine Hatem Fessi Hélene Parrot-Lopez

Polymers, based on Poly L-lactic acid (L-PLA) and coupled with β-Cyclodextrin (β-CD), have been used for the preparation of microspheres for drug encapsulation. The strategy was based on the modification of the terminal carboxylic group of L-PLA (73.000) by coupling it with a β-CD in the presence of the peptide coupling agents: DCC/HOBT. The degree of functionalisation was found to be 80%. Char...

2010
Dieter Brodalla

Introduction Sulfuric acid was first assessed to be carcinogenic in 1997 in a report of the World Health organization WHO (IARC). Based on this report, the Senate committee dealing with the control of harmful substances in the workplace submitted the first proposal justifying a lower occupational exposure limit [2].This proposal contained a list of many individual studies. In the investigations...

Journal: :Chemical communications 2011
Toshihiro Ihara Tsugutoshi Wasano Ryuta Nakatake Pelin Arslan Akika Futamura Akinori Jyo

Two DNA conjugates modified with ferrocene and β-cyclodextrin were prepared as a pair of probes that work cooperatively for DNA sensing, in which the electrochemical signal of ferrocene on one probe was significantly "quenched" by the formation of an inclusion complex with β-cyclodextrin of the other probe on the DNA templates.

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