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Ecotoxicology Assessment of Waste Water Emitted From Radomir Metal Industries (Bulgaria)
Мariana I. Lyubenova,Snejana B. Dineva,Irina B. Karadjova
Ecologia Balkanica , 2012,
Abstract: The purpose of this article is to evaluate the toxicological effect of wastewater emitted from Radomir Metal Industries". It has been registered that the range of 50% mortality (LC50) of great water flea (Daphnia magna St.) is limited between 75% and 80% effluent. The data mortality rate-effluent dilution for Pseudorasbora parva well correlated with linear regression, R2=0.86. LC50 is reported from exposure to raw sewage (100%). Results indicate that even when individual concentrations of toxic metals are within the permissible limits the effluent remains toxic for the hydrobiota perhaps due to the combine effect of the contaminants.
Bed bug cytogenetics: karyotype, sex chromosome system, FISH mapping of 18S rDNA, and male meiosis in Cimex lectularius Linnaeus, 1758 (Heteroptera: Cimicidae)
Snejana Grozeva,Valentina Kuznetsova,B Anokhin
Comparative Cytogenetics , 2010, DOI: 10.3897/compcytogen.v4i2.36
Abstract: Bugs (Insecta: Heteroptera) are frequently used as examples of unusual cytogenetic characters, and the family Cimicidae is one of most interest in this respect. We have performed a cytogenetic study of the common bed bug Cimex lectularius Linnaeus, 1758 using both classical (Schiff-Giemsa and AgNO3-staining) and molecular cytogenetic techniques (base-specific DAPI/CMA3 fluorochromes and FISH with an 18S rDNA probe). Males originated from a wild population of C. lectularius were found to have 2n = 26 + X1X2Y, holokinetic chromosomes, 18S rRNA genes located on the X1 and Y chromosomes; achiasmate male meiosis of a collochore type; MI and MII plates nonradial and radial respectively.
THE GOVERNMENT IN THE SOCIAL PROTECTION INSTITUTIONS IN REPUBLIC OF MACEDONIA
Mirjana SLANINKA-DINEVA
Journal of Special Education and Rehabilitation , 1998,
Abstract: In this paper the author analysis several aspects of the government in the social institutions in Macedonian.The author elaborates only the legal regime which is in accordance with Constitution. But, in this context, the author discusses about the practice which is designed by right of the government in the social institutions.There are two forms of the social institutions:1. Public institutions, and2. Private institutions, which are very differently, because there are two regime's government.So, the government of the public social institutions is in the competence of the state, or of the local-self government, too.But, the government in the private social institutions is not public, because it is in the competence of the founder, then, it is privately.
SOCIAL LAW IN THE REPUBLIC OF MACEDONIA IN THE FRAMEWORK OF CONTEMPORARY SOCIAL STATE
Mirjana SLANINKA-DINEVA
Journal of Special Education and Rehabilitation , 1999,
Abstract: In the paper the author presents some questions on the Macedonian Social law. Then, she thinks, that Social law is a relatively new law, but it’s going to develop on the principles of Social state. So, the author debates about a social-juridical, that is formed by the social rights, the subjects, the objects and a declaration for the holder.
The effect of zinc supply and succinate treatment on plant growth and mineral uptake in pea plant
Stoyanova, Zlatimira;Doncheva, Snejana;
Brazilian Journal of Plant Physiology , 2002, DOI: 10.1590/S1677-04202002000200005
Abstract: the influence of succinate treatment on zn toxicity was investigated using plant growth and mineral uptake as stress indicators. pea plants (pisum sativum l., cv. citrine) were treated with various zn concentrations (0.67 to 700 mm zn) in the presence and absence of 0.2 mm na-succinate. plants pre-treated with succinate and then exposed to zn exhibited higher dry root, stem and leaf weight than the plants treated with zn alone. an increase in zn supply resulted in a decrease in the concentrations of ca, mg, p in the roots and an increase of ca and n levels in the stems and leaves. the amount of zn in the roots, stems and leaves increased with greater zn rates. the succinate treatment increased p in the roots but did not affect the ca, n and mg contents in zn-treated plants. most of the zn taken up was retained in the roots after succinate treatment. the ameliorative effect of succinate on plant growth could be due to a lower zn translocation in the leaves and stems and increased zn accumulation in the roots. lower zn translocation in aboveground parts seemed to result from zn complexing by organic anion in the roots. this probably caused less zn transport to the stems and leaves and suggested that succinate has potential for complexing with zn and may play a role in tolerance to high zn levels.
The effect of zinc supply and succinate treatment on plant growth and mineral uptake in pea plant
Stoyanova Zlatimira,Doncheva Snejana
Brazilian Journal of Plant Physiology , 2002,
Abstract: The influence of succinate treatment on Zn toxicity was investigated using plant growth and mineral uptake as stress indicators. Pea plants (Pisum sativum L., cv. Citrine) were treated with various Zn concentrations (0.67 to 700 muM Zn) in the presence and absence of 0.2 mM Na-succinate. Plants pre-treated with succinate and then exposed to Zn exhibited higher dry root, stem and leaf weight than the plants treated with Zn alone. An increase in Zn supply resulted in a decrease in the concentrations of Ca, Mg, P in the roots and an increase of Ca and N levels in the stems and leaves. The amount of Zn in the roots, stems and leaves increased with greater Zn rates. The succinate treatment increased P in the roots but did not affect the Ca, N and Mg contents in Zn-treated plants. Most of the Zn taken up was retained in the roots after succinate treatment. The ameliorative effect of succinate on plant growth could be due to a lower Zn translocation in the leaves and stems and increased Zn accumulation in the roots. Lower Zn translocation in aboveground parts seemed to result from Zn complexing by organic anion in the roots. This probably caused less Zn transport to the stems and leaves and suggested that succinate has potential for complexing with Zn and may play a role in tolerance to high Zn levels.
Dynamic interaction of cracks in piezoelectric and anisotropic solids: A non-hypersingular BIEM approach
Dineva Petia,Gross Dietmar,Rangelov Tsviatko
Theoretical and Applied Mechanics , 2008, DOI: 10.2298/tam0803073d
Abstract: A non-hypersingular traction boundary integral equation method (BIEM) is proposed for the treatment of crack systems in piezoelectric or anisotropic plane domains loaded by time-harmonic waves. The solution is based on the frequency dependent fundamental solution obtained by Radon transform. The proposed method is flexible, numerically efficient and has virtually no limitations regarding the material type, crack geometry and type of wave loading. The accuracy and convergence of the BIEM solution for stress intensity factors is validated by comparison with existing results from the literature. Simulations for different crack configurations such as coplanar collinear or cracks in arbitrary position to each other are presented and discussed. They demonstrate among others the strong effect of electromechanical coupling, show the frequency dependent shielding and amplification resulting from crack interaction and reveal the sensitivity of the K-factors on the complex influence of both wave-crack and crack-crack interaction.
NiOx Nanoparticle Synthesis by Chemical Vapor Deposition from Nickel Acetylacetonate  [PDF]
Pavel Moravec, Ji?í Smolík, Helmi Keskinen, Jyrki M. M?kel?, Snejana Bakardjieva, Valeri V. Levdansky
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.24033
Abstract: Ni/NiO nanoparticles were synthesized by metal organics chemical vapor deposition of nickel acetylacetonate in an externally heated tube flow reactor at moderate temperatures, up to 500°C. Particle production and characteristics were studied by evaluating the effects of reactor temperature, precursor concentration, and flow rate through the reactor. In addition, two precursor decomposition methods were examined: thermal decomposition and reduction by hydrogen. Particle production was monitored with a scanning mobility particle sizer, and particle characteristics were studied using transmission electron microscopy, high resolution transmission electron microscopy, selected area electron diffraction, and energy dispersive spectroscopy. The presence of hydrogen in the reaction mixture influenced significantly both particle production and their characteristics.
Inheritance of color in Angora goats
D Phillip Sponenberg, Snejana Alexieva, Stefan Adalsteinsson
Genetics Selection Evolution , 1998, DOI: 10.1186/1297-9686-30-4-385
Abstract:
CHANGES IN THE IMMUNOLOGIC MARKERS OF ELASTIN DEGRADATION IN SUBJECTS WITH METABOLIC SYNDROME
Edward Mekenyan,Nadya Stancheva,Snejana Tisheva
Journal of IMAB : Annual Proceeding (Scientific Papers) , 2012,
Abstract: Background: It is known that metabolic syndrome characterized by diabetes, hypertension, dyslipidemia, and central obesity is associated with the syndrome of early vessels aging, characterized by a change in elasticity of the vessel wall. The early manifestation of the metabolic syndrome in younger people in the modern society, leads to earlier manifestation of the complications of early vessels aging, and the combination of several risk factors is crucial and leads to acceleration of the vessels aging. Elastin is one of the main building blocks of the of the vessel wall. Its main characteristic is its elasticity, allowing the vessel to restore its shape after stretching or shrinking. Loss of elasticity is a key component in the pathogenesis of cardiovascular complications Materials and methods: A study is conducted on 62 subjects with metabolic syndrome without vascular complications and 42 controls. The main objective of the study was to compare the imunological markers of elastin degradation in both groups and to assess their relationship with the risk factors characterizing the metabolic syndrome. Results: When comparing the mean value of AEAb IgG in the control group and subject group with metabolic syndrome (respectively 0,45 / - 0.11 and 0.54 / - 0.29) statistically significant higher mean value of AEAb IgG in the group with metabolic syndrome, t = -1,85, p = 0.03 is observed. When comparing the mean value of ATEAb IgG in the control group and subject group with metabolic syndrome (respectively 0,45 / - 0.13 and 0.55 / - .43) statistically significant higher mean value of ATAb IgG in the group with metabolic syndrome, F = 6,83, p = 0.01 is observed. There isn’t a statistically significant difference in AEAb IGM and ATropoEAb IgM in both groups. In the whole sample AEAb IgG showed positive correlation with total cholesterol with a correlation Spearman coefficient r = 0,25, and p = 0,02, with triglyceride levels with Pearson correlation coefficient of r = 0,35, p = 0,001 and with LDL levels with Spearman correlation coefficient r = 0,29, and p = 0,006. In the whole sample ATropoEAb IgG showed positive correlation with LDL levels with Spearman correlation coefficient r = 0,29, p = 0,006 and with levels of total cholesterol with a Pearson correlation coefficient r = 0,33, and p = 0,001. The Correlations are described by regression analysis and the relationship is linear. Conclusion: It is proved that the AEAb IgG and AtropoEAb IgG are significantly elevated in the subjects with metabolic syndrome without manifested cardiovascular complications compar
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