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L M Fadeeva

Publications and source records attributed to L M Fadeeva.

4 recordsLinked to original sources
PubMed1980

[Components of cyclic electron transport in stromal subchloroplast particles enriched with photosystem I].

The effects of specific electron transport inhibitors (e. g. Hg2+, dibromothymoquinone, antimycin A) on photo-induced oxidation-reduction of P700, electrochromic pigment changes and ATP yields in the photophosphorylation reactions of PS I-enriched subchloroplast particles, were studied. The results obtained suggest that in the absence of exogenous cofactors the cyclic electron transport proceeds through plastoquinone and plastocyanine molecules, partly maintained in the preparations. The low ATP production is correlated with the low rates of an electron transfer. The cyclic transfer increases to some extent after addition of exogenous plastocyanine; in addition to the above-mentioned carriers it includes also cytochrome b6; however, the electron flow in this case is not coupled with phosphorylation. None of these components are involved in cyclic electron transport in the presence of reduced DCIP, which ensures the ATP synthesis via an artificial loop for proton translocation.

2,6-Dichloroindophenol↗
PubMedDate not supplied

[Characteristics of the microflora of food products from the southwest zone of Kazakhstan].

The question as to the prevalence of toxigenic microscopic fungi in foodstuffs originating in Kazakhstan is but little studied. In particular, no information on the microflora in the products coming from the south-western areas of the republic are available. The paper brings forth the results consequent upon the study of the problem in the Guriev and Dzhambul regions typical of this area. Microflora in 317 samples of various foodstuffs (wheat grains, flour and mealy products, rice, husket millet, dried meat, etc.) taken in rural families was studied by conventional methods. A highly frequent and intensive contamination of the vegetable and animal products with micomycetes, among which a definite prevalence of the species belonging to genus Aspergillus was noted. Aspergilli were represented mainly by the species known by their toxigenicity (A. flavus, A. fumigatus, A. candidus, A. niger, A. versicolor and others). A conclusion is drawn as to a potential hazard of mycotoxicoses arising in the south-western part of Kazakhstan. Recommendations for instituting preventive measures are given.

Food Contamination↗