Zobrazeno 1 - 10
of 31
pro vyhledávání: '"P. Ioselis"'
Publikováno v:
Journal of Thermal Analysis. 42:31-40
Thermogravimetric and Rock-Eval techniques were used for the characterization of natural (humic) and synthetic (melanoidins) substances and their hydrocarbon generation potential. A similarity between the thermal behaviour of humic substances and of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a1da4aeb4a285b43c21c9733687a350
https://doi.org/10.1007/bf02546990
https://doi.org/10.1007/bf02546990
Autor:
J.W. de Leeuw, M. Muller-Vonmoos, Isaac R. Kaplan, T. Macihara, Thomas F. Dorsey, Shuichi Yamamoto, W.R. Woolfenden, Jaap J. Boon, Ronald J. Pugmire, Raphael Ikan, A. Rub, Shmuel Yariv, Zeev Aizenshtat, P. Ioselis, Y. Rubinsztain, Kenneth E. Peters, I. Miloslavsky, S. Morinaga, Ryoshi Ishiwatari, L.L. Anderson
Publikováno v:
Science of The Total Environment. :1-12
It has been suggested that marine humic and fulvic acids are formed by a condensation of sugars with amino acids or proteins via Maillard reaction. In order to investigate this hypothesis a series of melanoidins were synthesised under laboratory cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc1f4253736af1d750faf77db9c8a93e
https://doi.org/10.1016/0048-9697(92)90068-4
https://doi.org/10.1016/0048-9697(92)90068-4
Publikováno v:
Organic Geochemistry. 11:65-71
ESR measurements of stepwise-pyrolyzed melanoidins and humic substances (at various temperatures, mesh size, and pH values) furnished the following information: the melanoidin structure stabilizes the long-living free radicals in a manner similar to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e974ec3dcd6bbb72c5f5b03927f5538
https://doi.org/10.1016/0146-6380(87)90028-3
https://doi.org/10.1016/0146-6380(87)90028-3
Publikováno v:
Organic Geochemistry. 9:371-374
The infrared spectra of melanoidins which were prepared from galactose and neutral and basic amino acids (at various ratios) support in general the conclusion gained in Part I of this series. A striking resemblance in the IR spectra was obtained in m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::078798c4b8f60c38f6b2055af5cd71de
https://doi.org/10.1016/0146-6380(86)90118-x
https://doi.org/10.1016/0146-6380(86)90118-x
Publikováno v:
Organic Geochemistry. 12:273-279
Pyrolysis of humic substances and melanoidins in closed systems (autoclave and sealed ampoules) yielded a series of light hydrocarbons and volatile products. The yield of C 1 –C 4 hydrocarbons obtained by pyrolysis of certain melanoidins was consid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5723f8fca3b7d41414cad07996ca721a
https://doi.org/10.1016/0146-6380(88)90264-1
https://doi.org/10.1016/0146-6380(88)90264-1
Autor:
L.L. Anderson, Warner R. Woolfenden, Raphael Ikan, Zeev Aizenshtat, Ronald J. Pugmire, P. Ioselis, Y. Rubinsztain
Publikováno v:
Organic Geochemistry. 9:199-212
Melanoidins synthesized from amino-acids and sugars in various ratios and humic substances from Hula Basin (Israel) have been investigated by 13 C-CP/MAS NMR spectroscopy. Most spectra indicated a significant similarity between melanoidins and humics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9e5523253560366b137829b73c0534d
https://doi.org/10.1016/0146-6380(86)90070-7
https://doi.org/10.1016/0146-6380(86)90070-7
Publikováno v:
Organic Geochemistry. 6:805-811
Melanoidins of glucose or galactose and the amino acids tyrosine, methionine and lysine were analysed by Curie point pyrolysis-mass spectrometry and pyrolysis-gas chromatography-mass spectrometry. Specific chain characteristics of the reactant amino
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce3792499cb51783fedce26346009a29
https://doi.org/10.1016/0146-6380(84)90102-5
https://doi.org/10.1016/0146-6380(84)90102-5
Publikováno v:
Organic Geochemistry. 6:791-804
A series of sugar-amino acid derived melanoidins were synthesized and their chemical and physical properties were evaluated using spectral, chemical and thermal analyses. It is suggested that the melanoidin “back-bone” is probably a sugar-moiety
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a21a35f8e9314c8d9ceb578acad3382
https://doi.org/10.1016/0146-6380(84)90101-3
https://doi.org/10.1016/0146-6380(84)90101-3
Publikováno v:
Physics and Chemistry of the Earth. 12:567-577
A series of humic acid (HA) metal (Fe, Al) complexes were prepared and subjected to thermogravimetric and spectroscopic studies. The activation energies of decarboxylation were found to be 6–9 kcal/mole. H 2 O and CO 2 accounted for the main weight
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e1671e2916cf303eb12f6b757a022c1
https://doi.org/10.1016/0079-1946(79)90138-1
https://doi.org/10.1016/0079-1946(79)90138-1
Publikováno v:
Organic Geochemistry. 8:95-101
Thermogravimetric technique was used for the characterization of natural (humic) and synthetic (melanoidins) substances. The influence of pH on the thermal stability of humic substances was studied. A similarity in thermal behaviour of natural humic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faaf8dcef8f8d329163a7a5f1f7a237c
https://doi.org/10.1016/0146-6380(85)90057-9
https://doi.org/10.1016/0146-6380(85)90057-9