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Characterization of Acacia mangium polyflavonoid tannins by MALDI-TOF mass spectrometry and CP-MAS 13C NMR

Matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrum indicated a ?twice-angular? structure resolving itself into a branched polymer structure up to 7 units oligomers presented in Acacia mangium tannin.

出版机构:Elsevier Science

刊物名称:European Polymer Journal

出版时间:2010

ISSN:0014-3057

数据源:报刊文摘

Fabaceae Polysaccharides. III. Galactomannan from Astragalus cicer seeds

Seeds of Astragalus cicer L. (Fabaceae) afforded a galactomannan (5.90% yield of seed mass) of molecular weight 1064 kDa, solutions of which had high viscosity [?] 925.

出版机构:Springer US

刊物名称:Chemistry of Natural Compounds

出版时间:2010

ISSN:0009-3130

数据源:报刊文摘

Triterpene glycosides from Astragalus and their genins. LXXXV. Structure of cyclomacroside E

The structure of a new cycloartane-type triterpene glycoside, cyclomacroside E, which was isolated from roots of Astragalus macropus Bunge (Leguminosae), was established as 3-O-?

出版机构:Springer US

刊物名称:Chemistry of Natural Compounds

出版时间:2010

ISSN:0009-3130

数据源:报刊文摘

Molecular Heterogeneity of Cationic Polyisoprene

The effect of polymerization conditions on the molecular parameters and unsaturation of cationic polyisoprene synthesized with the BF3?O(C2H5)2-trichloroacetic acid catalytic system has been studied.

出版机构:Taylor & Francis

刊物名称:International Journal of Polymer Analysis and Characterization

出版时间:2009

ISSN:1023-666X

数据源:报刊文摘

Synthesis and structure elucidation of five new pyrimido[5,4‐c]quinoline‐4(3H)‐one derivatives using 1D and 2D NMR spectroscopy

Five new 2?(amino/aroxy)?5?methylpyrimido[5,4?c]quinolin?4(3H)?one derivatives have been designed and synthesized via an aza?

出版机构:John Wiley & Sons, Ltd.

刊物名称:Magnetic Resonance in Chemistry

出版时间:2010

ISSN:0749-1581

数据源:报刊文摘

Polychloroprene Degradation by Photo-Fenton. Conductivity Measures as New Approach for Detecting/Evaluation of Degradation Products

In the present work the photo-degradation of polychloroprene (PCP) in toluene solution catalyzed by FeCl3?

出版机构:Springer US

刊物名称:Journal of Polymers and the Environment

出版时间:2010

ISSN:1566-2543

数据源:报刊文摘

Use of chemical modification to determine the binding of Cd(II), Zn(II) and Cr(III) ions by orange waste

This study focuses on the roles played by three major functional groups (amine, carboxyl and hydroxyl) in the orange waste biomass for sorption of three heavy metals (Cd2+, Zn2+ and Cr3+).

出版机构:Elsevier Science

刊物名称:Biochemical Engineering Journal

出版时间:2010

ISSN:1369-703X

数据源:报刊文摘

Crystal transition from Na–cellulose IV to cellulose II monitored using synchrotron X-ray diffraction

Oriented samples of Na?cellulose IV, a hydrate form of cellulose II, were prepared from ramie fibers by mercerization. Crystal transition from Na?cellulose IV to cellulose II was monitored using synchrotron X-ray fiber diffraction under a controlled relative humidity. During drying of the Na?

出版机构:Elsevier Science

刊物名称:Carbohydrate Polymers

出版时间:2011

ISSN:0144-8617

数据源:报刊文摘

Origin of the regioselectivity in an intramolecular nucleophilic addition to arene chromium tricarbonyl complexes

The source of the regioselectivity in the intramolecular nucleophilic addition of nitrile-stabilized carbanions to arene chromium tricarbonyl complexes was investigated for seven different substitution patterns on the arenes.

出版机构:Elsevier Science

刊物名称:Inorganica Chimica Acta

出版时间:2010

ISSN:0020-1693

数据源:报刊文摘

A Study on the Processes for Lube Base Oil from Different Crude Lube Stocks

The lube oil industry has faced unprecedented changes in the process of manufacturing crude lube stocks. Furfural refining, ketone-benzol dewaxing, and clay finishing are selected and optimized respectively to process crude lube stocks.

出版机构:Taylor & Francis

刊物名称:Petroleum Science and Technology

出版时间:2011

ISSN:1091-6466

数据源:报刊文摘