oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2017 ( 185 )

2016 ( 319 )

2015 ( 5487 )

2014 ( 7091 )

自定义范围…

匹配条件: “Irina B. Karadjova” ,找到相关结果约145951条。
列表显示的所有文章,均可免费获取
第1页/共145951条
每页显示
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.
New Records of Microcystins in Some Bulgarian Water Bodies of Health and Conservational Importance  [PDF]
Vera Pavlova, Maya Stoyneva, Vesela Georgieva, Desislav Donchev, Lisa Spoof, Jussi Meriluoto, Zlatka Bratanova, Irina Karadjova
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.65044
Abstract:

Microcystins cause acute hepatotoxicity and chronic liver tumor promotion. This study presents the results of HPLC DAD analyses and their LC-MS confirmation of samples from five Bulgarian water bodies (reservoirs Stoudena, Pchelina, Bistritsa and lakes Dourankoulak, Vaya). The total concentration of microcystins in water samples ranged from 0.1 to 26.5 μg/l. The amount of microcystins in the biomasses ranged from 11.4 to 49.6 μg/g (d.w.). The high percent of positive samples in which the most toxic microcystin-LR is recorded, can serve as a strong alarm for the necessity of a serious study and relevant discussion of the problem with responsible authorities at national level.

Microcystins-LR, -YR and -RR in Six Bulgarian Water Bodies of Health and Conservational Importance (2012-2014)  [PDF]
Vera Pavlova, Maya Stoyneva-G?rtner, Blagoy Uzunov, Blagoy Uzunov, Zlatka Bratanova, Antoaneta Lazarova, Irina Karadjova
Journal of Water Resource and Protection (JWARP) , 2015, DOI: 10.4236/jwarp.2015.716111
Abstract: This study presented the results of HPLC-DAD microcystin and nodularin analyses from five Bulgarian water bodies (reservoirs Stoudena, Pchelina and Bistritsa, and lakes Dourankoulak and Vaya) carried out in 2012-2014, as a continuation of our work from 2004 to 2005 and in 2011, and first data on microcystins in the lake Momin Brod were detected in the period 2012-2014. The total concentration of microcystins in water samples ranged from 0.1 to 1.8 μg/l and their amount in the concentrated biomasses from net samples ranged from 1.35 to 296 μg/g (d.w.). The presence of the most toxic microcystin-LR was recorded in all studied lakes and reservoirs, where also microcystins RR and YR were detected, but no microcystin-LA and nodularin were found.
Crystallization in the Three-Component Systems Rb2SO4-MSO4-H2O (M = Mg, Co, Ni, Cu, Zn) at 298 K  [PDF]
Veronika Karadjova, Donka Stoilova
Journal of Crystallization Process and Technology (JCPT) , 2013, DOI: 10.4236/jcpt.2013.34022
Abstract:

The crystallization in the three-component systems Rb2SO4-MSO4-H2O (M = Mg, Co, Ni, Cu, Zn) is studied by the method of isothermal decrease of supersaturation. It has been established that isostructural double compounds,

Rb2M(SO4)2·6H2O (M = Mg, Co, Ni, Cu, Zn),\"\" , crystallize from the ternary solutions within wide

concentration ranges. The infrared spectra are discussed with respect to the normal vibrations of the sulfate ions and water molecules. The unit-cell group theoretical treatment of the double salts is presented. The extent of energetic distortions of \"\" guest ions (about 2 mol%) matrix-isolated in the respective selenates, \"\" (M' = K, Rb, \"\"; M\" = Mg, Co, Ni, Cu, Zn), is commented.

Investment Activity in Small Open Economies  [PDF]
Vera Karadjova, Sne?ana Di?evska
Technology and Investment (TI) , 2014, DOI: 10.4236/ti.2014.52008
Abstract:


The paper gives a brief elaboration of the basic macroeconomic aspects of investments with emphasis on the specificities of small open economies in the process, theoretically elaborates the need for openness of small economies (especially the economies that need the acceleration of their development), then highlights the risks and opportunities arising from the investment activity both on the micro and macro level. Further distinguishes between investments in financial instruments and in real investment projects, emphasize the need for creation of an optimal diversified portfolio. Finally, the paper underlines the need for various forms of foreign direct investment for all economies, particularly the opportunities and threats arising in small open economies, to complete the wholeness with empirical data of the previously elaborated matters on the example of the Republic of Macedonia as a small open economy.


FLORAL MORPHOGENESIS OF SOME SPECIES OF THE ACER GENUS
IRINA GOSTIN,B. MINEA
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2007,
Abstract: In the present paper the authors have investigated the flower’s structure of five species of the genus Acer: A. negundo, Acer saccharinum, A. ginalla, A. campestre, A. pseudoplatanus. Different aspects of the ontogenetic evolution, like the appearance and development of the primordia of the perianth (sepals and petals) and of the reproductive system (stamens and carpels), have been followed. Also, some particularities of the micro- and macrosporogenesis processes have been highlighted.
Aspects méthodologiques du droit coutumier à la lumière des paradigmes classiques et non classiques Methodological aspects of customary law in the light of classical and non-classical paradigms
IrinaB. Lomakina
Droit et Cultures , 2009,
Abstract: Le pluralisme juridique est analysé à la lumière de l’idéologie du multiculturalisme et des problèmes que pose l’acculturation juridique des minorités nationales. En s’appuyant sur la théorie du droit vivant d’Ehrlich et d’autres chercheurs, notamment de J. Carbonnier, dont la Sociologie juridique a été traduite en Russie en 1986, l’auteur met l’accent sur la méthodologie de la recherche en droit coutumier comme partie intégrante de la recherche en matière du pluralisme juridique. Legal pluralism is analyzed in light of the ideology of multiculturalism and of problems raised by the legal acculturation of national minorities. Relying on Ehrlich’s theory of living law and on other authors, especially Jean Carbonnier whose Legal sociology was translated and published in Russia in 1986, the author underlines the research methodology in customary law as an integral part of research in the field of legal pluralism.
POSSIBILITIES OF OPERATIONALIZING THE CONCEPT OF SUSTAINABLE DEVELOPMENT IN THE SPATIAL AND FUNCTIONAL EVOLUTION OF T RGU OCNA TOWN
Irina Ungureanu,Alexandru B?nica
Present Environment and Sustainable Development , 2008,
Abstract: In order to be able to put forward a set of realistic recommendations regarding a foreseeable effective and sustainable spatial evolution of Targu Ocna,we are compelled to rigorously analyse the natural suitability of the local environment and the subsequent restrictions for habitation, as well as the social and economical internal and external – namely its position within the regional and national urban system – context, and other human induced characteristics. The analysis of the favourability and restrictions brought about by the local environment requires a thorough study of the geomorphologic features of the urban site, as well as the potential morphology-related risk elements, in relation to the geological structure and groundwater configuration, to the hydrological variations and local microclimates, as well as to the local types of soil and vegetation. Alongside the natural suitability for habitation stand the social and economical factors, which play a fundamental part in the appropriate functionality of the urban environment - above all, a highly man-modified environment -, due to their ability to alter/to amend the natural favourability of the site, on one hand, and to convert themselves into premises for development, on the other. The social-economical favourability for development has been quantized by using a group of indicators, referring to the degree of accessibility to the road and railway network, the quality of the urban environment (the type of dwelling, the urban communications and public transportation, the availability of urban utilities and services, either educational, health facilities, commerce, leisure, banking or public administration), in relation to the town’s functions (residential, industrial,tertiary, tourism, agricultural). The integration of the two types of favourability may be fully accomplished by means of progressive view, which allows us to synthesize the complex results we have obtained so far into an useful instrument for the analysis of the current state as well as of the prediction of this small, yet very complex town’s future sustainable development. A further step has to be a comparative analysis between the results of this essentially geographical study as against the official local and regional planning papers, in order validate the latter, or,
Application of prodigiosin as a colorant for polyolefines  [PDF]
Irina Ryazantseva, Irina Andreyeva
Advances in Biological Chemistry (ABC) , 2014, DOI: 10.4236/abc.2014.41004
Abstract: Serratia marcescens strain 9986 is a producer of prodigiosin used as a dye of polyolefines (polyethylene, ultratene). The biosynthesis of pigment was closely connected with controlled growth parameters. A prodigiosin yield 0.2 - 0.4 mg per l of culture medium in the batch culture under aerobic conditions was obtained. Prodigiosin was extracted from crude biomass treated by 0.1% of sodium dodecyl sulfate (SDS). This novel elaborated stage is necessary for thermostability a dye in polymer. The consumption of prodigiosin preparation is more economical in the technology of the coloration of polyolefines. The elaborated method has been manufactured for dyeing polyethylene by biological pigment-articles of the common use corresponding to the technological standard.
CONTRIBUTIONS TO THE STUDY OF ANDRYALA LEVITOMENTOSA (E. I. NYáRáDY) P.D. SELL REPRODUCTIVE STRUCTURES ANATOMY
B. MINEA,B. M. NEGREA,IRINA GOSTIN
Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology , 2009,
Abstract: The paper treats A. levitomentosa reproductive structures from an anatomical point of view. The species exhibited traits that are common in the Asteraceae family but also a few peculiarities such as a possibly five-carpel ovary, free non connate anthers and filaments fused to the corolla at different levels. Early stage embryos but no seeds were observed. Crystals have a presence limited to only certain areas: the integument, the ovary plateau, the anther walls and the connective.
第1页/共145951条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.