1,227 research outputs found

    Gluonium as Bound State of Massive Gluons Described by the Joos-Weinberg Wave Functions

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    On the basis of the Kadyshevsky equal-time (quasipotential) approach, a set of partial-wave equations is derived for the wave function of a gluonium, a bound state of two gluons. The field operators of constituent gluons are considered as six component quantities according to the Joos-Weinberg 2(2S+1)2(2S+1)- component approach. The quasiclassical quantization condition for relativistic two-particle states and the above set could be used for calculations of gluonium energy levels.Comment: LaTeX file. 15 pp., 1 postscript figur

    Effect of type of explosives and physical-mechanical properties of explosive rock on formation of toxic gases in atmosphere of shafts

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    The quality of toxic gases formed during explosive work in underground shafts depends upon the type of explosives and the conditions of explosion. Several types of explosives and rocks were examined. All remaining conditions were maintained the same (sandy-argillaceous stemming, electrical method of explosions, diameter of blast holes, and the direct triggering of charges)

    Metabolic Responses to Prolonged Fasting in a Naturally Obese Marine Mammal

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    Many animals undergo fasting in order to survive during periods of severe weather, food scarcity, migration, or reproduction. While most animals decrease their metabolism while fasting, northern elephant seals fast for several months while undergoing energy-intensive activities such as molting and reproduction. Seals fuel their energy needs with large fat stores that they accumulate while foraging at sea, resembling human patients with diabetes and obesity (insulin sensitivity, high levels of glucose and fat) while fasting. While some of the hormone signals involved in fasting have been identified, the molecular mechanisms that regulate healthy metabolic adaptations to fasting in seals are not fully understood. We used proteome sequencing to examine changes in protein abundance in blood plasma and the main energy-utilizing (skeletal muscle) and energy-storing (blubber) tissues of adult female elephant seals over their five-week molting fast. We found that while blubber and muscle proteomes were remarkably stable over fasting, over 50 proteins changed in abundance in plasma, including those associated with fat storage, metabolism, and transport. Apolipoproteins, which are key components of cholesterol and fat-transporting particles (such as HDL and LDL), dominated proteome responses to fasting. Apolipoproteins associated with fat storage decreased, while those associated with fat burning and HDL function increased over fasting. Our findings suggest that changes in apolipoprotein composition may mediate the metabolic transitions between feeding and fasting and underlie metabolic health in elephant seals. Many of these proteins have not been previously studied in this species and provide intriguing hypotheses about metabolic regulation during prolonged fasting in mammals

    DEVELOPMENT OF TECHNICAL SOLUTIONS AIMED AT IMPROVING TECHNOLOGICAL CAPABILITIES, DESIGN CHARACTERISTICS AND INCREASING THE SERVICE LIFE OF BRIQUETTE PRESSES

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    Development of technical solutions for manufacturing and further use advanced roller press having advanced technological capabilities and increased resource exploitation
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