Dissolved hydrocarbon metabolism: The concentration-dependent kinetics of toluene oxidation in some North American estuaries1
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چکیده
منابع مشابه
Dissolved hydrocarbon metabolism: The concentration-dependent kinetics of toluene oxidation in some North American estuaries’
The metabolism of toluene by natural populations of marine bacteria, stored to enhance their activity, gave hyperbolic kinetics with saturation at only K, = 0.6 to 3.4 pg liter-‘. Similarly Kl in fresh seawater was 0.26 pg toluene liter-‘. Freshly collected populations could be moderately active toward toluene, affinity azA = 1.1-37.5 liters g-cells-l h-l. These moderate affinities taken togeth...
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A method having sufficient sensitivity to resolve the kinetic constants for dissolved nonpolar substrate metabolism, together with the related rate constants in natural waters, is presented. The method is based on the rate of CO(2) recovery from radioactive dissolved substrate. Sensitivity is enhanced by using large seawater volumes, high-specific-activity isotopes, and by reducing background r...
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Deactivation kinetics of a V/Ti-oxide catalyst was studied in partial oxidation of toluene to benzaldehyde (BA) and benzoic acid (BAc) at 523–573 K. The catalyst consisted of 0.37 monolayer of VOx species and after oxidative pre-treatment contained isolated monomeric and polymeric metavanadate-like vanadia species under dehydrated conditions as was shown by FT Raman spectroscopy. Under the reac...
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The kinetics of concentration-dependent toluene metabolism were examined by evaluating each term in the second-order rate equation. Marine and freshwater pseudomonads were used. Uptake for Pseudomonas sp. strain T2 was characterized by a completely saturatable system with small transport constant (K(t) = 44 mug/liter) and large specific affinity. Kinetics for Pseudomonas putida PpF1 were simila...
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چکیده هدف از این کار بررسی الکترواکسیداسیون کتکول و مشتقات آن در حضور 4-فنیل سمی کاربامازید بوده است اکسیداسیون کتکولها ترکیبات نا پایدار کینونها را تولید می کنند که این ترکیبات می تواند در واکنش مایکل بعنوان پذیرنده نوکلئوفیل عمل نمایند. در ادامه اکسایش کتکولهای (a-c1) را درحضور 4-فنیل سمی کاربامازید در محلول آب/استونیتریل (90/10)بوسیله ولتامتری چرخه ای و کولن متری در پتانسیل ثابت مورد بررسی ...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1986
ISSN: 0024-3590
DOI: 10.4319/lo.1986.31.1.0101