Magnetically operated nanorelay based on two single-walled carbon nanotubes filled with endofullerenes Fe@C20

Structural and energy characteristics of the smallest magnetic endofullerene Fe@C20 have been calculated using the density functional theory approach. The ground state of Fe@C20 is found to be a septet state, and the magnetic moment of Fe@C20 is estimated to be 8 Bohr magnetons. Characteristics of an (8,8) carbon nanotube with a single Fe@C20 inside are studied in the framework of the semiempirical approach. The scheme of a magnetic nanorelay based on cantilevered nanotubes filled with magnetic endofullerenes is elaborated. The proposed nanorelay is turned on as a result of bending of nanotubes by a magnetic force. Operational characteristics of such a nanorelay based on (8,8) and (21,21) nanotubes fully filled with Fe@C20 are estimated and compared to the ones of a nanorelay made of a (21,21) nanotube fully filled with experimentally observed (Ho3N)@C80 with the magnetic moment of 21 Bohr magnetons. Room temperature operation of (21,21) nanotube based nanorelays is shown.Comment: 18 pages, 9 figure

Thermocatalytic conversion of plastics into liquid fuels over clays

Recycling polymer waste is a great challenge in the context of the growing use of plastics. In this review, the comprehensive information on the thermocatalytic conversion of plastics over clays obtained during the last two decades was summarize

ANALYSIS OF HYDROGEN-INDUCED DIRECT PHASE TRANSFORMATION KINETICS IN Y2FE17 ALLOY ON THE BASE OF KOLMOGOROV'S MODEL

Кинетика индуцированного водородом прямого фазового превращения в магнитотвердом сплаве Y2Fe17 проанализирована в рамках кинетической модели Колмогорова. Установлено, что индуцированное водородом прямое фазовое превращение в магнитотвердом сплаве Y2Fe17 классифицируется как диффузионно-контролируемое превращение, реализующееся по механизму зарождения и роста с убывающей скоростью зарождения центров новых фаз − -Fe и YH2. На основе кинетической теории фазовых превращений Колмогорова получено кинетическое уравнение, хорошо описывающее изотермические кинетические кривые фазового превращения в сплаве Y2Fe17 в зависимости от температуры превращения.inetics of the hydrogen induced direct phase transformation in Y2Fe17 hard magnetic alloy has been analyzed in framework of Kolmogorov's kinetic model. It is established that hydrogen induced direct phase transformation in Y2Fe17 hard magnetic alloy classified as diffusion controlled transformation which occurs by mechanism of nucleation and growth with decreasing nucleation rate of new phases − α-Fe and YH2. On the base of Kolmogorov's kinetic theory of the phase transformations has been obtained kinetic equation that well described the isothermal kinetic curves of phase transformation in Y2Fe17 alloy depending on transformation temperature

Eritrocytic Parameters of the Blood of Calves with Different Birth Weights

In the conditions of a dairy farm with the help of the standard clinical, instrumental and laboratory methods the research on particularities of Eritrocytic parameters of the blood of calves (n=299) with different birth weights was carried out. It is shown that Holstein calves with normal intrauterine growth, born with body weight from 36.5 to 29 kg, have no reliable differences in red blood cell count. With a 1 kg reduction in body weight, there is a trend towards hyperchromia, but an increase in weight deficiency promotes of hypovolemia, hypochromia, and polycythaemia. In newborns with a body weight of 27.9–26.9 kg, polycythaemia is derived from hypovolemia, but, with a more pronounced weight deficiency, the role of erythrogenesis disorder in the pathogenesis of the syndrome increases. Hypochromia is a consequence of hematopoietic organs dysfunction and transmembrane loss of hemoglobin. Herein membrane destruction is caused by the increase in the content of toxical metabolites in the blood (sorptivity of red blood cells by 10–12 percent), and by a higher level of adrenaline (modification coefficient of membranes by adrenaline by 20–30 %). This indicates that the response of the fetus to the factors that inhibit its development is similar to a metabolic response against stress. At strong underweight body (b.w. less than 25 kg) exhausting of adaptive capability is observed with the increase in the blood level of toxical metabolites (sorptivity of red blood cells by 15 %), level of membrane destruction (level of ectoglobular hemoglobin in 2,8 times), and heterogeneity of red blood cells. Thus, in newborns with a body weight of less than 29 kg, the significant disturbances in the structure and functions of red blood cells were revealed, which gave grounds for stating that they had antenatal hypotrophy. Herewith, the severity of hematological changes depends on the degree of weight deficiency. Initially, it is hypovolemia and the resulting polycythemia, but, erythropoiesis disorders, and destruction of their membranes with increased polycythemia, and the development of hypochromia occur with the increasing severity of hypotrophy

Current hydroecological situation of the Starooskolsko-Gubkinsky mining region on the example of the Oskolets River

The results of the hydroecological study of the small Oskolets river in the area of influence of mining enterprises are presented. It is shown that the residential industrial flow of Gubkin city has a leading influence on the hydrochemical situation. Discharges of drainage waters made by the Lebedinsky mining and processing plant have a definite impact on the hydro-ecological situation with respect to the content of fluorine and lead compounds, and occasionally with respect to nitrogen compound

Use Of Plants To Remediate Soil Polluted With Oil

In the present investigation the growing and development ability of various annual and perennial plants to grow on model peat substrate artificially polluted with oil products in the range of concentrations from 1 to 5% was evaluated. The highest tolerance towards peat contamination by oil products has been demonstrated by three annual crops (maize, oat and lupine). These plants were tested for phytoremediation of polluted black soil from the area of oil refinery plant (Mazeikiai, Lithuania), which was treated by association of oil oxidizing bacteria up to residual concentration of the oil products of 4.5 %. The maize plants revealed the highest remediation ability: oil content in the soil decreased by ~ 1.5 times in one month plant vegetation