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Search Results: 1 - 10 of 456606 matches for " I.M. Dubrovskii "
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The role of angular momentum conservation law in statistical mechanics
I.M. Dubrovskii
Condensed Matter Physics , 2008,
Abstract: Within the limits of Khinchin ideas [A.Y. Khinchin, Mathematical Foundation of Statistical Mechanics. NY, Ed. Dover, 1949] the importance of momentum and angular momentum conservation laws was analyzed for two cases: for uniform magnetic field and when magnetic field is absent. The law of momentum conservation does not change the density of probability distribution in both cases, just as it is assumed in the conventional theory. It is shown that in systems where the kinetic energy depends only on particle momenta canonically conjugated with Cartesian coordinates being their diagonal quadric form,the angular momentum conservation law changes the density of distribution of the system only in case the full angular momentum of a system is not equal to zero. In the gas of charged particles in a uniform magnetic field the density of distribution also varies if the angular momentum is zero [see Dubrovskii I.M., Condensed Matter Physics, 2206, 9, 23]. Two-dimensional gas of charged particles located within a section of an endless strip filled with gas in magnetic field is considered. Under such conditions the angular momentum is not conserved. Directional particle flows take place close to the strip boundaries, and, as a consequence, the phase trajectory of the considered set of particles does not remain within the limited volume of the phase space. In order to apply a statistical thermodynamics method, it was suggested to consider near-boundary trajectories relative to a reference system that moves uniformly. It was shown that if the diameter of an orbit having average thermal energy is much smaller than a strip width, the corrections to thermodynamic functions are small depending on magnetic field. Only the average velocity of near-boundary particles that form near-boundary electric currents creating the paramagnetic moment turn out to be essential.
Synthetic amino acid-analogs of γ-aminobutyric acid
I.M. Ejimadu
Bulletin of the Chemical Society of Ethiopia , 1989,
Abstract: Bull. Chem. Soc. Ethiop., 2(2) 57-60 (1989).
Potential Nephrotoxicity in African Mud Catfish (Clarias gariepinus) Following Exposure to Compost Derived Humic Acid
I.M. Adekunle
Pakistan Journal of Biological Sciences , 2010,
Abstract: Influence of compost-derived Humic Acid (HA) on nephrotoxicity in juvenile African mud catfish (Clarias gariepinus) was evaluated in static water culture. Fish samples were exposed to different HA concentrations (0, 100, 250, 500 and 1000 mg L-1) for 45 days at 5 samples per aquarium. Renal function was assessed spectrophotometrically via levels of serum albumin, measured using bromocresol green, creatinine by Jaffe method and urea by Nesslerization method. Results revealed that the mean value of albumin or urea in the exposed group (I), at each HA concentration, was lower than the value found in the control group (II). Creatinine was relatively higher in I relative to II. Significant (p<0.05) variations for I and II were obtained at 250 to 1000 mgHA L-1 for the three biomarkers. Relative to increasing HA concentration, decreasing albumin (0.84 to 0.43 g dL-1: r = -0.114; p> 0.10), urea ( 5.21 to 1.95 mg dL-1; r = -0.586; p> 0.10) and increasing creatinine (0.20 to 1.53 mg dL-1: r = +0.704; p> 0.10) were recorded; r is correlation coefficient. Changes in urea were not predictive of nephrotic syndrome but alterations in albumin and creatinine revealed induced nephrotoxicity, especially at elevated HA concentrations (above 100 mg L-1). Overall, the effect of humic acid was dose-dependent. Further studies at various humic acid concentrations, especially below 100 mg L-1, are required to establish the actual nephrotoxic dose.
Lucr?ri ?tiin?ifice : Management Agricol , 2009,
Abstract: This paper investigates the effects of credit constraints on the Romanian farm investment behaviour. In order to do the empirical investigation the simulative approach is used in the construction of a model generically named SIMULPACROM. This one is then used in 21 farms specialised in crop production taken from the FDAN sample. The financial scenarios show that the barrowing possibilities importantly affect both the farm’s net revenue and its investment behaviour. The farm size and its indebt degree are variables which can explain the credit constraints.
Goal-oriented approach to diagnostics in management of an enterprise
I.M. Semenenko
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: Problems which occur while performing diagnostics of the state of an enterprise and the results of its activity have been revealed. The inexpediency of using problem approach to diagnostics in management of an enterprise in modern conditions of economic management has been defined. The significance and essence of goal-oriented approach to diagnostics in management of an enterprise have been revealed. It has been set that the management decisions, developed using the goal-oriented approach to diagnostics, are more efficient.
Direction of use of instruments of classic concept of municipal marketing in development of competitiveness of a city
I.M. Budnikevich
Marketing ì Mened?ment Innovacìj , 2011,
Abstract: The prerequisites of formation of the concept of classical marketing in Ukraine are considered in the paper. The definition of the municipal marketing in the framework of the classical concept is offered. The role of marketing instruments in formation of competitive advantages of the city is determined. The variants of segmentation of city environment and strategies of municipal marketing towards target markets are described. The experience of Dresden (Germany) in the field of realization of marketing concept is studied.
Preconditions for creation and use of innovative financial instruments in Ukraine’s derivatives market
I.M. Burdenko
Marketing ì Mened?ment Innovacìj , 2012,
Abstract: This article explores evolution of domestic market of derivatives, its main stages and brief description. Preconditions for creation and use of innovative financial instruments in derivatives market of Ukraine are analysed. For each stage of derivatives markets evolution were defined main trends of its development.
Treatment optimization in patients with stable angina pectoris: focus on verapamil SR
I.M. Sokolov
Rational Pharmacotherapy in Cardiology , 2011,
Abstract: Possibilities of angina pectoris pharmacotherapy are analyzed. Achievement of target heart rate (HR) 55-60 beats per minute in these patients is possible due to three classes of antianginal medications that slow down HR: beta blockers (BB), If-channel inhibitors, nondihydropyridine calcium channel blockers (CCB). Nondihydropyridine CCB verapamil in slow release (SR) formulation is focused. The main results of randomized clinical trials (APSIS, VHAS, CRIS, EVERESTH, VAMPHYRE, INVEST, VESPA, DAVIT-1, DAVIT-2), which have proven efficacy and safety, are presented. Verapamil SR is indicated for the treatment of angina pectoris in patients without history of myocardial infarction (MI); angina patients experienced MI without systolic heart failure and with contraindications to BB; angina with arterial hypertension; left ventricular diastolic dysfunction; peripheral arteries obliterating atherosclerosis; silent myocardial ischemia; vasospastic angina; angina associated with supraventricular cardiac arrhythmias (especially in permanent atrial fibrillation) except Wolff-Parkinson-White and Lown-Ganong-Levine syndromes; after coronary angioplasty and the placement of bare metal stents.
Effect of Selenium on Cadmium Induced Gonadotoxicity in Male Rats
I.M. Alhazza
Journal of Biological Sciences , 2005,
Abstract: The present study was conducted to investigate the possible effect of Selenium (Sel) against Cadmium (Cd) toxicity on hormones and gonads of male rats. Male rats were divided into three groups. First group served as control, second group administrated s.c. cadmium chloride (2.5 mg kg -1) and third group injected s.c. with Sel (0.35 mg kg -1) and Cd. In the last group, the animals were treated with Sel one hour before Cd treatment. Blood samples were collected and eight animals were sacrificed after two, four, six and eight weeks. Plasma testosterone, FSH and LH were assayed using enzyme immunoassay method. The sperm quality was evaluated. Cd in the testes was determined using atomic absorption. The weights of body, testes and accessory sex organs were recorded. The treatment of the rats with Cd results in a significant decrease of testosterone, LH, sperm motility (%), body gain and weights of testes, epididymis, vas deference, seminal vesicle and prostate gland. On the other hand, the sperm abnormalities and FSH concentration increased significantly in Cd treated rats. Cd content in the testes of second group and third group increased in a time-related fashion. Cd concentration in the testes of rats treated with Cd and Sel was less than that of rats injected with Cd alone. Sel was found to reduce the deleterious effects of Cd.
Enkele aanvullende gegevens omtrent de biografie van Hadrianus Junius
I.M. Veldman
BMGN : Low Countries Historical Review , 1974,
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