Research of component composition and catalitic reactivity of metallurgical industry slag

The article deals with the research of component composition and catalitic reactivity of metallurgical waste products. The slags component composition was investigated by X-ray fluorescence analysis. The slag stuff has been modified with alkali (NaOH) and mineral acids (HNO3, H2SO4, HCI and H3PO4), and their catalytic reactivity in the catalytic decomposition of ethyl alcohol and hydrogen peroxide has been determined for the first time. The revealed catalytic reactivity of the slag staff for the decomposition of ethyl alcohol and hydrogen peroxide indicates the need for a more detailed research and development of an industrial non-ferrous waste treatment technology

Research of component composition and catalitic reactivity of metallurgical industry slag

The article deals with the research of component composition and catalitic reactivity of metallurgical waste products. The slags component composition was investigated by X-ray fluorescence analysis. The slag stuff has been modified with alkali (NaOH) and mineral acids (HNO3, H2SO4, HCI and H3PO4), and their catalytic reactivity in the catalytic decomposition of ethyl alcohol and hydrogen peroxide has been determined for the first time. The revealed catalytic reactivity of the slag staff for the decomposition of ethyl alcohol and hydrogen peroxide indicates the need for a more detailed research and development of an industrial non-ferrous waste treatment technology

Research on zinc concentrate dressing at the zhezkent processing plant to obtain conditioned concentrate

The article investigates dressing of zinc concentrate of Zhezkent processing plant with the purpose of receiving conditioned zinc concentrate and copper product output. The scheme of the zinc concentrate ressing is suggested which includes the following operations: desorption of the initial concentrate by sodium sulfide and activated carbon; preliminary hydraulic classification (washing of thin sludge) complicating the flotation process; comminution of the concentrate in a ball mill up to the size of 96 %, class - 0,044 mm; flotation of copper minerals by reagents: xanthate, Methyl isobutyl ketone blowing agent, and depressors (Na2S, FeSO4, ZnSO4). The proposed dressing scheme provides obtaining conditioned zinc concentrate of grade KC-3 with Zn 47,0 %, and Cu 1,9 %

Fetal growth, birth size and energetic cost of gestation in southern right whales

The cost of reproduction greatly affects a species’ life history strategy. Baleen whales exhibit some of the fastest offspring growth rates in the animal kingdom. We quantified the energetic cost of gestation for southern right whales (Eubalaena australis) by combining whaling catch records of pregnant females with photogrammetry data on southern right whale mothers and calves from two breeding grounds in Argentina and Australia. The relationship between calf birth size and maternal length was determined from repeated measurements of individual females before and after giving birth. Fetal growth was determined from generalized linear models fitted to fetal length data from whaling operations between 1961 and 1967. Fetal length was converted to volume and mass, using the volume-to-length relationship of newborn southern right whales calves, and published tissue composition and energy content estimates. Fetal maintenance costs (heat of gestation) and the energy content of the placenta were predicted from published relationships and added to the fetal growth cost to calculate the total cost of gestation. Our findings showed that fetal growth rates and birth size increased linearly with maternal length, with calves being born at ∼35% maternal length. Fetal length increased curvilinearly through gestation, which resulted in an exponential increase in fetal volume and mass. Consequently, the cost of gestation was very low during the first (0.1% of total cost) and second trimester (4.9%), but increased rapidly during the last trimester (95.0%). The heat of gestation incurred the highest cost for pregnant females (73.8%), followed by fetal growth (21.2%) and the placental energy content (5.0%)

Percolation in Models of Thin Film Depositions

We have studied the percolation behaviour of deposits for different (2+1)-dimensional models of surface layer formation. The mixed model of deposition was used, where particles were deposited selectively according to the random (RD) and ballistic (BD) deposition rules. In the mixed one-component models with deposition of only conducting particles, the mean height of the percolation layer (measured in monolayers) grows continuously from 0.89832 for the pure RD model to 2.605 for the pure RD model, but the percolation transition belong to the same universality class, as in the 2- dimensional random percolation problem. In two- component models with deposition of conducting and isolating particles, the percolation layer height approaches infinity as concentration of the isolating particles becomes higher than some critical value. The crossover from 2d to 3d percolation was observed with increase of the percolation layer height.Comment: 4 pages, 5 figure

АКТУАЛЬНЫЕ ВОПРОСЫ ОРГАНИЗАЦИИ СПЕЦИАЛИЗИРОВАННОМ ПОМОЩИ ПОСТРАДАВШИМ ОТ ОЖОГОВ В КРАСНОДАРСКОМ КРАЕ

BACKGROUND. The number of burn victims in Russia is growing annually. However, combustiology remains one of the few medical specialties in the country, which has no accepted procedure for the care delivery.MATERIAL AND METHODS. The article presents an analysis of high-tech medical assistance delivery to victims of burns in the Krasnodar Region. We also consider challenging issues on combustiology services organization in Russia and economic aspects for patients with burn injury under the compulsory medical insurance.RESULTS AND CONCLUSION. Up to 3,000 patients requiring hospital treatment are registered in the Krasnodar Region. Of 2,200 operations, 2,000 surgeries are performed in the regional burn center. Implementation of regional system of “early surgical treatment” allowed to reach some of the lowest mortality rates in Russia (in the Region: total 2.43%, adults 4.69%, children 0.16%).АКТУАЛЬНОСТЬ. Ежегодно в Российской Федерации отмечается рост числа пострадавших от ожогов. Однако ком-бустиология остается одной из немногих медицинских специальностей в России, по которой не принят Порядок оказания помощи.МАТЕРИАЛ И МЕТОДЫ. В статье представлен анализ организации и оказания доступности высокотехнологичной медицинской помощи пострадавшим от ожогов в Краснодарском крае. Рассмотрены проблемные вопросы организации комбустиологической службы в России и экономические аспекты оплаты больных с ожоговой травмой по системе обязательного медицинского страхования.РЕЗУЛЬТАТЫ И ЗАКЛЮЧЕНИЕ. Ежегодно в Краснодарском крае регистрируется до 3000 больных c ожоговой травмой, требующих стационарного лечения. Из 2200 операций 2000 выполняют в Краевом ожоговом центре. Организация краевой системы «раннего хирургического лечения» позволила достигнуть одних из самых низких показателей летальности в России (в крае: общая 2,43%, взрослая 4,69%, детская 0,16%)

Orbital effects of a monochromatic plane gravitational wave with ultra-low frequency incident on a gravitationally bound two-body system

We analytically compute the long-term orbital variations of a test particle orbiting a central body acted upon by an incident monochromatic plane gravitational wave. We assume that the characteristic size of the perturbed two-body system is much smaller than the wavelength of the wave. Moreover, we also suppose that the wave's frequency is much smaller than the particle's orbital one. We make neither a priori assumptions about the direction of the wavevector nor on the orbital geometry of the planet. We find that, while the semi-major axis is left unaffected, the eccentricity, the inclination, the longitude of the ascending node, the longitude of pericenter and the mean anomaly undergo non-vanishing long-term changes. They are not secular trends because of the slow modulation introduced by the tidal matrix coefficients and by the orbital elements themselves. They could be useful to indepenedently constrain the ultra-low frequency waves which may have been indirectly detected in the BICEP2 experiment. Our calculation holds, in general, for any gravitationally bound two-body system whose characteristic frequency is much larger than the frequency of the external wave. It is also valid for a generic perturbation of tidal type with constant coefficients over timescales of the order of the orbital period of the perturbed particle.Comment: LaTex2e, 24 pages, no figures, no tables. Changes suggested by the referees include