Výsledky vyhledávání

Soil cation exchange capacity measurements using ultrafiltration techniques: Comparison of different metal ions as substitutes

Autor: M. T. Lam, B.‐J. Zhao, C. Wang, D. S. Gamble, M. H. Back

Publikováno v: Communications in Soil Science and Plant Analysis. 28:161-171

An attempt was made to introduce a membrane ultrafiltration technique into the measurement of soil cation exchange capacity (CEC). The CEC data from four soil samples obtained using the simplified method yielded identical results to those obtained us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::01defd4570dca14b04d372d1e5e33f4a
https://doi.org/10.1080/00103629709369780

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The flash photolysis of aqueous solutions of rhodizonic and croconic acids

Autor: B. Zhao, M. H. Back

Publikováno v: International Journal of Chemical Kinetics. 26:25-36

The flash photolysis of aqueous solutions of rhodizonic and croconic acids has been studied in the presence and absence of electron acceptors. No transient absorption which could be identified with an excited state was observed with either anion. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a73500d71770a8aaefe5f1922aeaf588
https://doi.org/10.1002/kin.550260105

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Photoinitiation of acrylamide polymerization using the dianions of rhodizonic and croconic acids

Autor: B. Zhao, M. H. Back

Publikováno v: Journal of Polymer Science Part A: Polymer Chemistry. 30:2399-2406

Polymerization of acrylamide has been initiated by the photochemical reactions of the dianions of croconic acid (1,2-dihydroxycyclopentenetrione) and rhodizonic acid (1,2-dihydroxycyclohexenetetrone) in the presence of various acceptor molecules. Pho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da9a2b711873d7f05df378ff2f67e73f
https://doi.org/10.1002/pola.1992.080301114

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Kinetics of the photochemical reactions of the croconate dianion in aqueous solution

Autor: M. H. Back, B Zhao

Publikováno v: Canadian Journal of Chemistry. 70:135-143

The kinetics of the photochemical reactions of the dianion of croconic acid (1,2-dihydroxycyclopentenetrione) have been studied in aqueous solution in the presence of electron acceptors. In neutral solutions the quantum yield for disappearance of cro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd0a8c3cf32407494bde959d0aed40ce
https://doi.org/10.1139/v92-023

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The photochemistry of the rhodizonate dianion in aqueous solution

Autor: B Zhao, M. H. Back

Publikováno v: Canadian Journal of Chemistry. 69:528-532

The thermal and photochemical reactions of rhodizonate dianion have been studied in aqueous solution in the presence of various oxidizing agents. Both reactions are initiated by electron transfer to an acceptor which is a sufficiently strong oxidizin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e8da963485dd02ceaab54247a81fc54e
https://doi.org/10.1139/v91-079

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The decomposition of ethylene by pulsed CO2 laser radiation at pressures from 500 to 3000 torr and the use of the 2 C2H4?cyclobutane equilibrium as an internal thermometer

Autor: R.A. Back, L. Giroux, M. H. Back

Publikováno v: Applied Physics B Photophysics and Laser Chemistry. 52:138-149

The decomposition of ethylene by pulsed, unfocussed CO2-laser radiation has been studied at pressures from 500 to 3000 Torr, using the P(14) line of the 10.6μm band (v=949.48cm−1) at incident fluences from about 0.1 to 1.0J/cm2. Major products in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::115a5b6f95e6d7e696ccb7f33f875d3c
https://doi.org/10.1007/bf00357668

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Comment: A re-evaluation of the rate constant for abstraction of hydrogen from isobutane by methyl radicals

Autor: M. H. Back, H.-X. Zhang

Publikováno v: International Journal of Chemical Kinetics. 22:537-541

The rate constant for abstraction of hydrogen from isobutane by methyl radicals has been re-examined making use of new measurements at temperatures above 660 K. Most of the data over the temperature range 300-855 K can be accommodated by the followin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::57ea87312534615e64ca153e93d01077
https://doi.org/10.1002/kin.550220509

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Rate constants for abstraction of hydrogen from ethylene by methyl and ethyl radicals over the temperature range 650-770 K

Autor: H.-X. Zhang, M. H. Back

Publikováno v: International Journal of Chemical Kinetics. 22:21-35

Measurements rate constants for abstraction of hydrogen from ethylene by methyl and ethyl radicals relative to the corresponding rate constants for abstraction from hydrogen, over the temperature range 650-770 K, are reported. The method is based on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::691168910dc62889db4ebcb1ecb56d9b
https://doi.org/10.1002/kin.550220103

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