The influence of submicron particles of photocatalytically active heavy metal oxides on the content of organic acids in the cultivation medium of filamentous biodestructors fungi

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The effect of submicron particles of heavy metal oxides WO3, CsTeMoO6 и RbTe1.5W0.5O6 with photocatalytic activity on the content of organic acids in the culture medium of fungi Aspergillus niger, Chaetomium globosum, Penicillium chrysogenum was studied. It has been shown that submicron particles WO3, CsTeMoO6 и RbTe1.5W0.5O6 are able to influence the concentration and composition of organic acids produced by the studied biodestructor fungi both in darkness and under the influence of light, and the effect is multidirectional. In a number of experimental variants, a decrease in the content of individual organic acids in the culture medium of the studied fungi was observed. At the same time, under the action of CsTeMoO6, the concentration of lactic acid in the culture medium of Aspergillus niger increased many times. A similar trend was observed for succinic acid in the case of Penicillium chrysogenum under the action of RbTe1.5W0.5O6 and Chaetomium globosum under the action of CsTeMoO6 in dark conditions. It was noted that in some cases, under the action of the studied particles, there was an absence of individual organic acids in the mushroom culture medium compared with the control. A decrease in the content of organic acids in the culture medium in both dark and light conditions for all fungi was observed only in the case of WO3. In most cases, the studied biocides, both in the dark and in the light, caused a decrease in the total content of organic acids in the culture medium. This allows us to talk about the inhibition of acid formation processes in fungi by these compounds, which explains the expediency of using them as a means of protecting materials from microbiological damage caused by microscopic fungi.

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作者简介

N. Anikina

Lobachevsky State University

编辑信件的主要联系方式.
Email: undinaf@gmail.com
俄罗斯联邦, Nizhny Novgorod, 603022

Ya. Shirokov

Lobachevsky State University

Email: yarshirokov@gmail.com
俄罗斯联邦, Nizhny Novgorod, 603022

O. Smirnova

Lobachevsky State University

Email: protectfun@mail.ru
俄罗斯联邦, Nizhny Novgorod, 603022

V. Smirnov

Lobachevsky State University

Email: biodeg@mail.ru
俄罗斯联邦, Nizhny Novgorod, 603022

A. Shishkin

Lobachevsky State University

Email: uandshi@yandex.ru
俄罗斯联邦, Nizhny Novgorod, 603022

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2. Fig. 1. Content of organic acids produced by the fungus Chaetomium globosum in culture medium containing submicron particles of WO3 (A), RbTe1.5W0.5O6 (B) and CsTeMoO6 (C) under dark (T) and light (C) conditions.

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3. Fig. 2. Content of organic acids produced by the fungus Aspergillus niger in culture medium containing submicron particles of WO3 (A), RbTe1.5W0.5O6 (B) and CsTeMoO6 (C) under dark (T) and light (C) conditions.

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4. Fig. 3. Content of organic acids produced by the fungus Penicillium chrysogenum in culture medium containing submicron particles of WO3 (A), RbTe1.5W0.5O6 (B) and CsTeMoO6 (C) under dark (T) and light (C) conditions.

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