Výsledky vyhledávání - "R. D. Sedgwick"

Fast Atom Bombardment mass spectra of involatile sulphonated and phosphonated azo dyestuffs

Autor: John J. Monaghan, R. D. Sedgwick, Andrew N. Tyler, Robert S. Bordoli, Michael Barber

Publikováno v: International Journal of Mass Spectrometry and Ion Physics. 46:447-450

Positive and negative ion Fast Atom Bombardment mass spectra have been obtained for involatile mono- and disazo dyestuffs, containing up to five sulphonate and phosphonate groups. The spectra are discussed with special reference to the ions formed by

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d3bcb14a09ce0262a34cd40c08e31b65
https://doi.org/10.1016/0020-7381(83)80148-x

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Application of mass spectrometry to copolymers of ethylene and propylene oxides. II. Kinetic analysis

Autor: R. D. Sedgwick, A. K. Lee

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 16:997-1003

Molecular-weight distributions derived from mass spectrometric studies of some alkylene oxide copolymers have been used to calculate rate constant ratios for the first eight steps in the polymerization process. Results suggest that there is a signifi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8307bb0add22368a96b08ca3f2644934
https://doi.org/10.1002/pol.1978.170160511

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Degradation of low-density polyethylene in the presence of water and deuterium oxide

Autor: R. D. Sedgwick, A. M. Abushihada, Y. Y. Al-Sultan

Publikováno v: Journal of Polymer Science: Polymer Chemistry Edition. 19:2007-2015

The degradation of low-density polyethylene in the presence of water as the degradative agent was studied at a temperature of 450°C and a pressure greater than 160 atm. The experimental work was conducted in an autoclave of 333-mL capacity. The prod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66b32d9ee4244d8c50b003b499dc9a99
https://doi.org/10.1002/pol.1981.170190813

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The Kinetics of Ester-Ester Exchange Reactions by Mass Spectrometry

Autor: H. G. Ramjit, R. D. Sedgwick

Publikováno v: Journal of Macromolecular Science: Part A - Chemistry. 10:815-824

The kinetics of ester-ester exchange reactions between poly(ethy1ene adipate) and poly(trimethy1ene adipate) have been studied by mass spectrometric techniques. Reactions were carried out in the absence of catalyst and solvent. Rate constants for the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0567356f6bd4428fa714ae6246e1b27
https://doi.org/10.1080/00222337608061220

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High-temperature reactions of hydroxyl and carboxyl PET chain end groups in the presence of aromatic phosphite

Autor: R. D. Sedgwick, C. E. Forbes, Shaul M. Aharoni, F. Mares, Willis B. Hammond, K. P. O'Brien, D. M. Hindenlang

Publikováno v: Journal of Polymer Science Part A: Polymer Chemistry. 24:1281-1296

When melt-extruded in the presence of triphenylphosphite (TPP), the molecular weight of polyesters such as poly(ethylene terephthalate) (PET) increases with time. Analysis of the PET chain end groups and model studies of high-temperature reactions in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d19ca5ab96135eb4af354cfec35d495
https://doi.org/10.1002/pola.1986.080240614

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Fast-atom-bombardment mass spectra of enkephalins

Autor: G V Garner, Andrew N. Tyler, Robert S. Bordoli, D B Gordon, L W Tetler, R. D. Sedgwick, M Barber

Publikováno v: Biochemical Journal. 197:401-404

The positive- and negative-ion mass spectra of [methionine]enkephalin and [leucine]enkephalin have been obtained by using a fast-atom-bombardment source described previously by Barber, Bordoli, Sedgwick & Tyler [(1981) J. Chem. Soc. Chem. Commun., in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0838145a8a35111ff78d15326a6de904
https://doi.org/10.1042/bj1970401

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Binary decision prediction probabilities and the accuracy of interpretation of mass spectra

Autor: R. D. Sedgwick, R. A. Adams

Publikováno v: Organic Mass Spectrometry. 9:884-887

The results of the applications of computer learning techniques to decision making in the evaluation of mass spectral data are used to propose a model in which molecular complexity is related to binary decision prediction probability. This model is t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1042a1fb33c417923cd0f1979b11f000
https://doi.org/10.1002/oms.1210090908

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Mass spectral studies of some dithioethers and diamine-dithioethers

Autor: F.P. McCullough, William Levason, C. A. Mcauliffe, R. D. Sedgwick

Publikováno v: Inorganica Chimica Acta. 27:185-189

The mass spectra of bis(phenylthio)methane, 1,2-bis(phenylthio)ethane, 1,3-bis(phenylthio)propane, 1,6-bis(phenylthio)hexane, 1,8-bit(phenylthio)octane, cis -1,2-bis(phenylthio)ethylene, o-phenylenebis(phenylthioether), some methyl-substituted analog

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33bdcc6d3462386545753caac1fd9bd6
https://doi.org/10.1016/s0020-1693(00)87282-5

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