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Article
Organic Silicon in Plants as a Limiting Factor of Forage Digestibility in the Nutrition of Herbivorous Mammals
The effect of organic forms of silicon contained in plant tissues on the digestibility of feed for herbivorous mammals was studied. In the process of digestion, an extremely small part of the consumed silicon ...
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Article
Forage Resources, Nutrition, and Food Supply of Free-Grazing Camels (Сamelus bactrianus) in a Pasture within the Natural Steppe Zone
Abstract—This paper reports the results of investigation on the food of free-grazing Bactrian camels in a forb–grass steppe pasture, including anthropogenically disturbed areas with dominance of ruderal annuals. ...
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Article
Nutrition of bison (Bison bison), camels (Сamelus bactrianus), and horses (Equus caballus) from their joint grazing on an isolated steppe pasture
The nutrition of free-ranging bison (Bison bison), domestic horses (Equus caballus), and camels (Camelus bactrianus) were investigated from their joint grazing on a forb-grass steppe pasture. The species compo...
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Article
Fodder resources and feeding of semifree bison (Bison bison) on a steppe pasture in the Western Manych valley
In 2012–2013, the species composition, aboveground phytomass, and nutrition of freely ranging bison were investigated on a natural steppe pasture of the Western Manych valley. The aboveground mass of plants on...
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Article
Modeling of abiotic ATP synthesis in the context of problems of early biosphere evolution
The pathway of adenosine triphosphate (ATP) synthesis in living organisms consists of two autonomous stages; this must be taken into account during the design and analysis of chemical models of the abiogenesis...
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Article
Photoexcited molecules of pteridine derivatives in prebiotic and biological evolution
In the models of prebiotic processes, flavins and other pteridine derivatives transform light energy into the energy of chemical bonds, including energy-rich bonds of ATP. In the course of biological evolution...
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Article
Abiotic model of photophosphorylation of ADP to ATP: Characteristics of photoreceptor pigments and the role of organosilicate matrix
A model of photophosphorylation of ADP to ATP under UV and blue light with the use of substances available in the prebiotic period of evolution is proposed. It is shown that the photoactive pigments of flavin ...
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Article
Quantitative characterization of the nutrition of the free-living horse (Equus caballus) on Vodnyi Island (Manych-Gudilo Lake)
The nutritional value of plant fodder, daily consumption, and digestibility of forage were assessed in an isolated group of free-living (wild) horses inhabiting the pastures of Vodnyi Island during different s...
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Article
Quantitative assessment of feeding in a free-ranging group of Przewalski horses, Equus przewalskii, in a steppe habitat (the Askania Nova Biosphere Reserve)
The daily food intake and digestibility by Przewalskii horses were estimated under conditions of free ranging in the steppe Askania Nova Reserve. The digestibility was determined from the proportions of inert ...
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Article
Characteristics of the accumulation of phenolic compounds in amaranth leaves under the effect of growth stimulators
It is shown that preplanting treatment of seeds and foliar treatment of amaranth plants in the budding stage with amaranth-based biopreparations Amirosel, Albit, and Amir has a positive effect on accumulation ...
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Article
Excited flavin and pterin coenzyme molecules in evolution
Excited flavin and pterin molecules are active in intermolecular energy transfer and in photocatalysis of redox reactions resulting in conservation of free energy. Flavin-containing pigments produced in models...
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Article
Photoactivated matrices in prebiotic evolution processes
The processes of abiogenesis of biologically important compounds (amino acids, peptides, pyruvic acid, etc.) under the conditions of adsorption in mineral (titanium dioxide, silica gel) or organic (melanoidin)...
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Article
Photobiochemistry of folates: A photochemical reduction of folic acid
Exposure of deaerated folic acid solutions containing an electron donor to UV radiation (310–390 nm, I = 0.4 W m−2) induced formation of dihydrofolic acid (DHFA), a photoexcitation which gave tetrahydrofolic acid...
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Article
Modeling of abiogenic synthesis of ATP
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Article
Forms of Silicon in Medicinal Plants
The contents of three forms of silicon (organic, soluble mineral, and polymeric) were determined in leaves of 21 medicinal plants. At a total content of silicon of 0.74 to 3.59%, the organic, soluble mineral, ...
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Article
Study of Chemical Structure and of Photochemical Activity of Abiogenic Flavin Pigment
A product with molecular mass of 500–550 Da was isolated from a pigmented material formed by thermolysis (185°C) of a mixture of glutamic acid, glycine, and lysine (the optimal molar ratio of 8:3:1). After pur...
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Article
Phenolic Substances in Medicinal Plants
Compositions of phenolic substances were studied in the leaves of 21 species of medicinal plants. Flavonoid levels varied from 1.94 to 5.42%, whereas total amounts of monomeric polyphenols and hydroxybenzoic a...
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Article
Pellets of Some Mollusks in the Biogeochemical Flows of C, N, P, Si, and Al
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Chapter and Conference Paper
The Nucleotide and Nucleotide-Like Coenzymes in Primitive Metabolism, Photobiology and Evolution
The evolutionary link between hypothetical primordial RNA world [1] and the modern R(D)NA/Protein biosphere can hardly be revealed by only searching for chemical roots of primitive genetic coding. The analysis of...
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Article
Hydroxyanthraquinones and flavonoids of garland chrysanthemum
The stems of the vegetable plant garland chrysanthemum (Chrysanthemum coronarium L.) were shown to contain emodin (in its aglycone and glycoside forms) and chrysophanol. Chrysophanol and chrysazin were isolated f...
