Low-molecular-weight model study of peroxide cross-linking of ethylene-propylene (-diene) rubber using gas chromatography and mass spectrometry

2008 ◽  
Vol 1201 (2) ◽  
pp. 141-150 ◽  
Author(s):  
R. Peters ◽  
D. Tonoli ◽  
M. van Duin ◽  
J. Mommers ◽  
Y. Mengerink ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Molecular Weight ◽  
Gas Chromatography ◽  
Cross Linking ◽  
Low Molecular Weight ◽  
Ethylene Propylene ◽  
Model Study ◽  
Ethylene Propylene Diene Rubber ◽  
Diene Rubber ◽  
Weight Model

Chemical analysis of flavour volatiles in heat-treated milks

1978 ◽  
Vol 45 (3) ◽  
pp. 391-403 ◽  
Author(s):  
Haytham A. Jaddou ◽  
John A. Pavey ◽  
Donald J. Manning
Keyword(s):  
Mass Spectrometry ◽  
Heat Treatment ◽  
Molecular Weight ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Volatile Compounds ◽  
Raw Milk ◽  
Low Molecular Weight ◽  
Total Volatile ◽  
Heat Treated

SummaryThe effect of heat treatment of milk on low molecular weight, volatile compounds was studied in order to relate changes in the flavour of milks to changes in chemical composition. Milks were heat treated in a UHT plant for 3 or 90 s at 140 °C and stored at ambient temperature for periods up to 112 d. Volatile compounds in raw milk and in heated milks were isolated by a low temperature spray distillation technique and identified using gas chromatography and mass spectrometry. Cabbagey defects in heated milks are correlated with total volatile sulphur and it is concluded that the compounds H2S, COS, CH3SH, CS2 and (CH3)2S could be responsible for this defect.

scholarly journals Off-line analysis in the manganese catalysed epoxidation of ethylene-propylene-diene rubber (EPDM) with hydrogen peroxide

RSC Advances ◽  
2021 ◽  
Vol 11 (51) ◽  
pp. 32505-32512
Author(s):  
C. Maurits de Roo ◽  
Johann B. Kasper ◽  
Martin van Duin ◽  
Francesco Mecozzi ◽  
Wesley Browne
Keyword(s):  
Hydrogen Peroxide ◽  
Cross Linking ◽  
Reactive Blending ◽  
Ethylene Propylene ◽  
Polar Materials ◽  
Ethylene Propylene Diene Rubber ◽  
Diene Rubber ◽  
Line Analysis

Epoxidation of ethylene-propylene-diene rubber (EPDM), based on 5-ethylidene-2-norbornene, to epoxidized EPDM (eEPDM) opens routes to cross-linking and reactive blending, with increased polarity aiding adhesion to polar materials such as silica.

scholarly journals Studien über Wespengift, I Niedermolekulare Bestandteile des Giftblasenextraktes von Paravespula vulgaris / Studies on Wasp Venom, I Low Molecular Weight Constituents of Venom Sac Extracts from Paravespula vulgaris

1981 ◽  
Vol 36 (6) ◽  
pp. 757-762 ◽  
Author(s):  
Hartmut Klein ◽  
Wittko Francke ◽  
Wilfried A. König
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Fatty Acids ◽  
Molecular Weight ◽  
Gas Chromatography ◽  
Acetic Acid ◽  
Quantitative Analysis ◽  
Amino Acid ◽  
Low Molecular Weight ◽  
Wasp Venom

Abstract Low molecular weight constituents of 3400 venom sacs of Paravespula vulgaris were extracted with water, diluted acetic acid, and methanol. After conversion to volatile derivatives carbohydrates, amino acids, fatty acids, other constituents of phospho lipids, and biogenic amines were identified by gas chromatography and mass spectrometry. Quantitative analysis was achieved for amino acids by amino acid analysis and for glucose by an enzymatic assay. Results are discussed with regard to biosynthesis of wasp toxins and phylogenetic aspects of hymenopteran venoms.

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