Lebedev S.L.,Surgut State University
International Journal of Modern Physics A | Year: 2014
The radiation processes emerging as a result of interaction between spin and orbit degrees of freedom of spinning charge are investigated with the use of the Bargmann-Michel-Telegdi (BMT) model. The spin contribution to the self-energy of the ultrarelativistic particle is imaginary and proportional to invariant constructed from the derivatives of the worldline and from the spin. This invariant determines up to negative numerical factor of the QED spin contribution to the imaginary part of the mass shift (MS). Particular cases of crossed, electric and magnetic external fields are considered in detail. The influence of an ideal boundary upon the self-energy of the particle is analyzed for the crossed field case. In the presence of the "mirror" the imaginary part of the MS gets an addition and the nonzero spin dependent real part appears, both however giving the small corrections to no-boundary MS. An alternative method to obtain the spin magnetic moment correction to the power of synchrotron radiation entails in generalization of the result known for the planar motion. Special attention is given to disagreement between classical and quantum pictures of spin radiation. © 2014 World Scientific Publishing Company.
Lebedev S.L.,Surgut State University
Journal of Experimental and Theoretical Physics | Year: 2016
Spin radiative effects in a one-particle sector of QED have a dual nature and can be understood with the Frenkel classical rotating-electron model. In the region of parameters under study γ⊥ 2 ≫ 1 (γ⊥ 2 = 1 + p⊥ 2/m2) and χ ≪ 1 (χ = √(eFµvpv)2/m3), the imaginary part of the mass shift and radiation power contain two types of spin contributions. The contributions of the first type are related to the intrinsic magnetic moment of a fermion representing an additional source of electromagnetic radiation. The contributions of the second type have the opposite sign and are caused by a small change in the electron acceleration appearing due to the Frenkel addition to the particle mass. Contributions of the second type dominate, which explains the “wrong” sign of total spin corrections. We show that not only the sign but also the values of coefficients can be explained with specified accuracy using classical electrodynamics if corrections to the mass shift (action) and radiation power are calculated in canonical variables, i.e., for fixed velocity and momentum values, respectively. The results can be treated as a demonstration of the correspondence principle in the field of radiative spin effects, in addition to correspondence between classical and quantum theories at the tree (in the external filed) level. For ae ≡ (g–2)/2 ≲ χ ≪ 1, equations of the Frenkel model lead to generalization of the system of Lorentz–BMT (Bargmann–Michel–Telegdi) equations taking into account the Frenkel addition to mass. Some features of experimental observations of the spin light are discussed. © 2016, Pleiades Publishing, Inc.
Eskov V.M.,Surgut State University |
Eskov V.V.,Surgut State University |
Filatova O.E.,Surgut State University
Measurement Techniques | Year: 2011
We have identified five special properties of biological systems requiring development of new synergistic study methods. We consider the possibility of constructing some quasi-attractors for biosystems in multidimensional phase space and evaluate the properties of the biosystems based on analysis of the parameters of these quasiattractors and using the three postulates of compartmental/cluster theory. We give some biological examples. © 2011 Springer Science+Business Media, Inc.
Korneeva E.V.,Surgut State University
Russian Journal of Cardiology | Year: 2015
Aim. The assessment of the influence of long-term orlistat use on the eating behavior of obesity patients. Material and methods. Totally 189 young patients studied with various grade of obesity, of those 107 women and 82 men at the age 18-44 y. o. Comparison group consisted of 34 healthy women and 31 healthy men (mean age — 39,21±0,46 y.). The anthropometric study performed, evaluation of food taking behavior, measurement of ghrelin level in the blood serum via ELISA method. Non-medication treatment (hypocaloric diet, physical exertion) was provided during 3 months. If no effect, then orlistat was prescribed 120 mg per os t. i.d. for 6-24 months. Results. Among the studied patients, there were various types of eating behavior disorders found, mostly of emotiogenic and external types, nonbalanced of the food being taken. The decrease of body mass and mean value of WC was more prominent in patients with the III grade of obesity. Ghrelin level in the blood correlated with DMI and WC. The decrease of ghrelin in blood serum by from 10,4% in 6 months treatment to 46,3% in 24 months treatment witnessed sufficient saturation by the food if rational pattern of eating had been kept. After the end of treatment stability of following the rational pattern of food intake and healthy life style in the orlistat group less than 6 months was 59,5%, in 24 months — 97,8%. Conclusion. Medication type of treatment, especially orlistat usage, is recommended to obesity patients as supportive to life style modification. Serious decrease of bodyweight is possible for the patients with obesity if long-term following healthy lifestyle. © 2015, Silicea-Poligraf. All rights reserved.
Konovalova E.V.,Surgut State University
Bulletin of the Russian Academy of Sciences: Physics | Year: 2014
It is found means of X-ray structural analysis, transmission electron microscopy, scanning electron microscopy combined with electron backscatter diffraction, and optical metallography that the reduction of the integral magnitude of the long-range atomic order in Ni3Mn and Pd3Fe L12-superstucture alloys ordered through the A1 + L12two-phase region is accompanied by antiphase domains coarsening and grains fining. © Allerton Press, Inc., 2014.
Karpin V.A.,Surgut State University
Human Ecology | Year: 2014
In recent decades, great achievements in the field of geology, astronomy and cosmology attracted attention of the scientific community to study of biotropic effects of heliogeophysical factors, especially to different anomalies of natural magnetic fields. A new branch in science - magnetic biology has appeared. Several strategic directions in study of magnetic biological effects have been outlined so far: importance of natural magnetic anomalies in complex biotropic impact of various adverse ecological factors on human body; interrelation of heliogeomagnetic activity with climatic elements of regions; study of features of magnetic biological effects in the territory of the northern latitudes where biogenic effects of heliogeomagnetic anomalies are most vivid. The obtained results necessitate the need of a wider research of heliogeophysical factors' risk for population health in the northern urban territories.
Nenashev A.V.,Surgut State University
Radioelectronics and Communications Systems | Year: 2014
The problem of simulation of nonlinear radio engineering devices is considered on the basis of the functional analysis theory. It has been shown that in particular cases such approach results in known techniques of harmonic balance and Volterra series. The new algorithm, which has better computing characteristics compared with techniques of harmonic balance and of Krylov subspaces, has been developed. © 2014, Allerton Press, Inc.
Lebedev S.L.,Surgut State University
JETP Letters | Year: 2015
The equations of motion of the Frenkel model at γ ≫ 1, ae ≲- χ ≪ 1 (where γ is the Lorentz factor, ae = 1/2(g − 2), and χ = √(eFμνpν)2/me3 result in the generalization of the Lorentz and Bargmann-Michel-Telegdi equations. The modification is due to the Frenkel addition mFr to the mass of the electron and can be of interest for currently planned experiments with relativistic beams. The derived Frenkel-Bargmann-Michel-Telegdi equation contains a longitudinal part with a time-dependent coefficient, which is nonzero at g = 2. In the case of constant background fields, the equations of trajectory and spin can be integrated with a required accuracy if the antiderivative of the function mFr(τ) is known. A new representation of the spin-orbit contribution Δmso to the mass shift has been found in terms of the geometric invariants of world lines. It has been shown that the rate of variation of Δmso is determined by ae + mFr/me. The possibility of the periodic variation of spin light along the trajectory of beam has been indicated. © 2015, Pleiades Publishing, Inc.
Petrova Yu.Yu.,Surgut State University
Journal of Analytical Chemistry | Year: 2010
It has been found that histamine acts as an inhibitor in the reaction of hydroquinone peroxidation catalyzed by Cu(II), when it is carried out in a solution, and as an activator, when this reaction is carried out on paper carriers. A supposition on the reasons for the inhibiting and activating effects has been made on the basis of the theory of the intermediate active complex. A procedure for the determination of (3-9) × 10-13 M histamine using copper-containing paper filters with chemically attached hexamethylenediamine groups has been developed. The strongest interference with the determination of histamine is observed for diethylamine and triethylamine. The procedure has been used for the sorption-catalytic determination of histamine in human saliva at the nM level. © Pleiades Publishing, Ltd., 2010.
Korneeva E.V.,Surgut State University
Cardiovascular Therapy and Prevention (Russian Federation) | Year: 2015
Aim. To study the dynamics of cardiovascular risk factors in younger patients with obesity at the background of orlistat reception (Xenalten® 120 mg). Material and methods. The prospective study is done of the orlistat usage among 189 women and men at the age 18-44 y. o. during 3 years, of those 107 women and 82 men. Comparison group (n=65) consisted of healthy men and women. The main group (n=189) took orlistat 120 mg t. i.d. with a meal, together with hypocaloric diet and aerobic activities. All studied patients were selected into 3 groups according to the duration of the drug intake (6,12,24 months) and obesity grade (I,II,III). During the study anthropometric parameters were assessed as the parameters of lipid, carbohydrate metabolism, blood pressure, vessel wall condition: intima-media thickness of systolodiastolic relation, time of acceleration and index of acceleration. All comparisons were double-compared with significance threshold as ≤0,01. Results. The most significant results were obtained in II and III degree of obesity patients taking the drug for 12 or 24 months - the decrease of waist circumference by 25,9% and 26,4%, lipid and glycemic profiles normalization, decrease of mean systolic arterial pressure and normalization of nocturnal blood pressure. The decrease of bodyweight by 23,8±0,31 kg among the main group and by 5,2±0,02 kg among the comparison group, and improvement of lipid profile with the treatment decreased the risk of ischemic heart disease. In patients after 6 months of orlistat intake the relation of triglycerides to high density cholesterol lipids decreased by 40,0%, and taking for 12 months - by 73,1%, for 24 months - 74,1%. Orlistat was well tolerated. Most adverse events in the main group were mild, and can be simply regarded as expected side effects. Conclusion. The clinically significant effectiveness of orlistat capsule 120 mg is found, for the complex treatment of obesity and for the decrease of cardiovascular risk factors as dyslipidemia, arterial hypertension, insulin resistance. The usage of the drug helps to retain patients ability and adherence to obesity treatment.