Transformationen von trans-2-Hexenal durch Botrytis cinerea PERS. als Entgiftungsmechanismen / Transformations of trans-2-Hexenal by Botrytis cinerea PERS. as Detoxification Mechanisms

Abstract The metabolization of trans-2-hexenal - one of the main components of plant wound gases with antibiotic activity - was investigated for 5 different isolates of Botrytis cinerea PERS. The transformation products as well as the kinetics of their formation were analyzed. Isolates exclusively mycelium forming (Bc 1 and Bc 13) transformed tr-2-hexenal into tr-2- hexenol, while sporulating isolates (Bc 3, Bc 9 and Bc 10) converted tr-2-hexenal to hexanol-1. Basically the metabolization of tr-2-hexenal proceeded in the same way via the aqueous phase as in the gas phase. The transformation products tr-2-hexenol and hexanol-1 showed significantly lower toxicity against the tested B. cinerea isolates than tr-2-hexenal. In each isolate the end product of tr-2- hexenal conversion had the weakest inhibitory activity. The transformation reactions thus represent detoxification mechanisms for these fungi.

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Characterization and kinetics of lipase inhibitory Activity of streptomyces tendae

International Journal of Pharma and Bio Sciences ◽

10.22376/ijpbs.2017.8.2.b270-274 ◽

2017 ◽

Vol 8 (2) ◽

Author(s):

GURMEET SINGH ◽

VENKATA KRISHNA BAYINENI ◽

RAVIKUMAR KADEPPAGARI

Keyword(s):

Inhibitory Activity ◽

Streptomyces Tendae ◽

Kinetics Of

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Polarographic studies on renaturation of urea-denatured human serum albumin

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19890536 ◽

1989 ◽

Vol 54 (2) ◽

pp. 536-543 ◽

Cited By ~ 1

Author(s):

Josef Chmelík ◽

Pavel Anzenbacher ◽

Vítěz Kalous

Keyword(s):

Human Serum Albumin ◽

Serum Albumin ◽

Human Serum ◽

Irreversible Process ◽

State Model ◽

Native Protein ◽

Main Components ◽

Two State Model ◽

Kinetics Of

The renaturation of the two main components of human serum albumin, i.e. of mercaptalbumin and nonmercaptalbumin, was studied polarographically. It has been demonstrated that renaturation of both proteins after 1-min denaturation in 8M urea is reversible. By contrast, renaturation after 200 min denaturation in 8M urea is an irreversible process; the characteristics of renatured mercaptalbumin differ more from the properties of the native protein than the characteristics of nonmercaptalbumin. The studies of the kinetics of renaturation of both proteins have shown that the renaturation can be represented by a two-state model. This means that the existence of stable intermediary products during the renaturation process was not determined polarographically.

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Diffusion model for deposition of epitaxial GaAs layers prepared by the MOCVD method

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19912020 ◽

1991 ◽

Vol 56 (10) ◽

pp. 2020-2029

Author(s):

Jindřich Leitner ◽

Petr Voňka ◽

Josef Stejskal ◽

Přemysl Klíma ◽

Rudolf Hladina

Keyword(s):

Experimental Data ◽

Growth Rate ◽

Kinetic Model ◽

Gas Phase ◽

Substrate Surface ◽

Deposition Process ◽

Hydrogen Atmosphere ◽

Epitaxial Gaas ◽

Kinetics Of ◽

Good Agreement

The authors proposed and treated quantitatively a kinetic model for deposition of epitaxial GaAs layers prepared by reaction of trimethylgallium with arsine in hydrogen atmosphere. The transport of gallium to the surface of the substrate is considered as the controlling process. The influence of the rate of chemical reactions in the gas phase and on the substrate surface on the kinetics of the deposition process is neglected. The calculated dependence of the growth rate of the layers on the conditions of the deposition is in a good agreement with experimental data in the temperature range from 600 to 800°C.

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Kinetics of the intramolecular four-center elimination of isobutylene from triisobutylaluminum in the gas phase

Journal of the American Chemical Society ◽

10.1021/ja01039a007 ◽

1969 ◽

Vol 91 (11) ◽

pp. 2867-2871 ◽

Cited By ~ 44

Author(s):

Kurt W. Egger

Keyword(s):

Gas Phase ◽

Kinetics Of

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Study on leaching kinetics of hexavalent chromium from aged calcium-free chromium slag

Main Group Chemistry ◽

10.3233/mgc-210045 ◽

2021 ◽

pp. 1-13

Author(s):

Quan Qi ◽

Liang Li ◽

Liangyu Wei ◽

Baoming Hu ◽

Zheng Liu ◽

...

Keyword(s):

Hexavalent Chromium ◽

Resource Utilization ◽

Scientific Basis ◽

Diffusion Reaction ◽

Leaching Kinetics ◽

Leaching Rate ◽

Chromium Slag ◽

Leaching Solution ◽

Main Components ◽

Kinetics Of

To provide a scientific basis for the resource utilization of chromium slag, this article studies the release law of hexavalent chromium in the aged calcium-free chromium slag. XRD (X-ray diffractometer) and MLA (Mineral Liberation Analyzer) were used to analyze the composition of the chromium slag; using sulfuric acid-nitric acid as the leaching solution, the release law of hexavalent chromium in chromium slag and the leaching kinetics were studied. The results show that main components of the chromium slag are magnesioferrite, chromite, hematite, hydrargillite, and spinel; chromium is mainly present in chromite and magnesioferrite; the leaching rate of hexavalent chromium increases with the increase of temperature or the decrease of pH. The analysis of leaching kinetics shows the leaching rate is controlled by the internal diffusion reaction, and the apparent activation energy is 11.93 kJ·mol–1. The chromium slag is aged in high temperature seasons, which is conducive to the precipitation of hexavalent chromium in the chromium slag, can increase the yield of chromate in the roasting kiln, and is conducive to resource utilization; chromium slag should be stored in order to prevent acid rain erosion which leads to environmental pollution risk (e.g. drinking water).

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