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1.984 Aktuelle Fachpublikationen zum Thema temperature

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Synergistic Effect between Defect Sites and Functional Groups on the Hydrolysis of Cellulose over Activated Carbon

12.12.2014 | Guo Shiou Foo, Carsten Sievers, ChemSusChem, 2014

Abstract The chemical oxidation of activated carbon by H2O2 and H2SO4 is investigated, structural and chemical modifications are characterized, and the materials are used as catalysts for the hydrolysis of cellulose. Treatment with H2O2 enlarges the pore size and imparts functional groups such ...

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Catalytic surface radical in dye-decolorizing peroxidase: A computational, spectroscopic and site-directed mutagenesis study

11.12.2014 | Linde D; Pogni R; Canellas M; Lucas F; Guallar V; Baratto M; Sinicropi A; S{a}ez-jim{e}nez V; Coscolin C; Romero A; ..., Biochemical Journal, 2014

Dye-decolorizing peroxidase (DyP) of Auricularia auricula-judae has been expressed in E. coli, as a representative for new DyP family, and subjected to mutagenesis, spectroscopic, crystallographic and computational studies. The crystal structure of DyP shows a buried haem cofactor, and surface ...

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Secondary Organic Aerosol from Aqueous Reactions of Green Leaf Volatiles with Organic Triplet Excited States and Singlet Molecular Oxygen

11.12.2014 | Nicole K. Richards-Henderson; Andrew T. Pham; Benjamin B. Kirk; Cort Anastasio, Environmental Science & Technology, 2014

Vegetation emits a class of oxygenated hydrocarbons - the green leaf volatiles (GLVs) - under stress or damage. Under foggy conditions GLVs might be a source of secondary organic aerosol (SOA) via aqueous reactions with hydroxyl radical (OH), singlet oxygen (1O2*), and excited triplet states ...

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Detection of H2O2 at the Nanomolar Level by Electrode Modified with Ultrathin AuCu Nanowires

11.12.2014 | Ning Wang; Yu Han; Ying Xu; Caizhen Gao; Xia Cao, Analytical Chemistry, 2014

Bimetallic AuCu nanowires (AuCuNWs) are synthesized via a facile water solution method at room temperature. Enhanced electrocatalytic activity is observed toward the oxidation of H2O2, which makes the AuCu nanowire, along with its unique catalytic properties, intriguing bifunctional mechanism, ...

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Classical and Nonclassical Germanium Environments in High-Pressure BaGe5

11.12.2014 | Rodrigo Castillo; Wilder Carrillo-Cabrera; Ulrich Schwarz; Yuri Grin, Inorganic Chemistry, 2014

A new crystalline form of BaGe5 was obtained at a pressure of 15(2) GPa in the temperature range from 1000(100) to 1200(120) K. Single-crystal electron and powder X-ray diffraction patterns indicate a body-centered orthorhombic structure (space group Imma, Pearson notation oI24) with unit cell ...

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Materials, Vol. 7, Pages 7737-7751: Surface Characteristics and Catalytic Activity of Copper Deposited Porous Silicon Powder

04.12.2014 | Halim, Muhammad Yusri Abdul; Tan, Wei Leng; Bakar, Noor Hana Hanif Abu; Bakar, Mohamad Abu, Materials, 2014

Porous structured silicon or porous silicon (PS) powder was prepared by chemical etching of silicon powder in an etchant solution of HF: HNO3: H2O (1:3:5 v/v). An immersion time of 4 min was sufficient for depositing Cu metal from an aqueous solution of CuSO4 in the presence of HF. Scanning ...

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Kinetics Analysis of Heterogeneous Oxidation of Coal Particles in Supercritical Water

03.12.2014 | Honghe Ma, Shuzhong Wang, Lu Zhou, Suxia Ma, Jiang Fan, Donghai Xu, Chemical Engineering & Technology, 2014

Abstract Little research has been conducted on the heterogeneous kinetics of coal oxidation in supercritical water (SCW). Therefore, the oxidation of coal particles in SCW coupled with heat and mass transfer was investigated. The real coal particle temperature was estimated in terms of a ...

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Entropy, Vol. 16, Pages 6300-6312: Ab intio Investigation of the Thermochemistry and Kinetics of the SO2 + O3− → SO3− + O2 Reaction in Aircraft Engines and the Environment

01.12.2014 | Guo, Xuechao ; Nadykto, Alexey B.; Xu, Yisheng ; Zhang, Qingzhu ; Hu, Jingtian, Entropy, 2014

In the present work, the mechanisms, thermochemistry and kinetics of the reaction of SO2 with O3− have been studied using the CCSD(T)/6-31G(d) + CF method. It has been shown that there exist two possible pathways A and B of the SO2 + O3− → SO3− + O2 reaction. The two pathways’ A and B barrier ...

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Development of a stability-indicating high performance liquid chromatography method for assay of erythromycin ethylsuccinate in powder for oral suspension dosage form

30.11.2014 | Author(s): Fahimeh Kamarei , Farshid Movaghari , Alireza Ghaffari , Iman Soltani Bozchalooi , Ali Zamani , Ali ..., Arabian Journal of Chemistry, 2014

Publication date: December 2014 Source:Arabian Journal of Chemistry, Volume 7, Issue 6 Author(s): Fahimeh Kamarei , Farshid Movaghari , Alireza Ghaffari , Iman Soltani Bozchalooi , Ali Zamani , Ali Jabbari In this study an effective method was developed to assay erythromycin ...

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Molecules, Vol. 19, Pages 19907-19922: The Epoxidation of Limonene over the TS-1 and Ti-SBA-15 Catalysts

28.11.2014 | Wróblewska, Agnieszka, Molecules, 2014

Limonene belongs to a group of very important intermediates used in the production of fine chemicals. This monoterpene compound can be obtained from peels of oranges or lemon which are a (biomass) waste from the orange juice industry. Thus, limonene is a renewable, easy available and a relatively ...

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