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Recent Vertebrate Animal Bones (Animalia: Vertebrata) from Yubileyna Cave (Rhodopes Mountain, South Bulgaria)
Georgi S. Dudin,Dilian G. Georgiev,Slaveya B. Stoycheva
Ecologia Balkanica , 2011,
Abstract: Excavations (area of 50 x 50 cm and 20 cm depth) at about 15 m from the cave entrance revealed various vertebrate fauna. As individual numbers the mammals and the frogs predominated as bone remains. All other taxa were with low percent of occurrence. The trogloxenic species dominated than the troglophilic. Considering the cave characteristics and the taxonomical identity of the bones we proposed two main ways of bone accumulation in this cave in recent times.
New Late Pleistocene locality of the Alpine Ibex (Capra ibex L.) (Mammalia: Bovidae) in Bulgaria
DILIAN GEORGIEV,SLAVEYA STOYCHEVA
ZooNotes , 2010,
Abstract: There were a total of 12 localities of fossil Alpine Ibex (Capra ibex) in Bulgaria till now, all of Late Pleistocene. Most of them were from the West part of Stara Planina Mountain. The paper reports the easternmost cave locality of this species from the Pchena Cave (Tvardishki Balkan area, Stara Planina Mnt.), near the town of Tvarditsa. The find represents a cranial fragment, bearing the horn shafts.
New localities of Quaternary fossil Bears (Ursus sp. L.) (Mammalia: Carnivora: Ursidae)
Dilian Georgiev,Liubomir Yankov,Slaveya Stoycheva,Stanimira Deleva
ZooNotes , 2010,
Abstract: Bear bones were reported for first time in four Bulgarian caves: Mazata (near Hristo Danovo village, Stara Planina Mnt.) - Ursus cf ingressus, Ursus sp., Kokalenata (near Bulgarka hut, Stara Planina Mnt.) - Ursus cf ingressus, Kiliykite (near Stanchov Han village, Stara Planina Mnt.) - Ursus sp. and Vodnata Modarska (near the Lilkovo village, Western Rhodopes Mnt.) - Ursus spelaeus species complex.
Biomonitoring Study of Air Pollution with Betula pendula Roth., from Plovdiv, Bulgaria
Slaveya T. Petrova
Ecologia Balkanica , 2011,
Abstract: The present study is a small part of a program for application the methods of passive and active biomonitoring with tree, herbaceous, moss and lichen species for assessment of the anthropogenic factor in urban conditions. All reported results here are preliminary. Betula pendula was studied as a possible biomonitor of air pollution in Plovdiv. Eight sampling sites in the urban roadside, city center and suburban areas were investigated. Chlorophyll content was determined as essential and sensitive physiological parameter. The concentrations of 26 micro and macroelements were analyzed by FAAS and ICPMS. Maximum for chlorophyll was found in the birch leaves from west part of the town, minimum – in these from north part. More significant variations were detected for Ni, Mn, B, Cr, Co, Fe, Bi, Cd, Al, Zn. Highest concentrations of 12 elements were found in the samples, collected from the central area of Plovdiv.
A contibution to the knowledge of the trophic spectrum of three lacertid lizards from Bulgaria
Ivelin Mollov,Slaveya Petrova
Journal of BioScience and Biotechnology , 2013,
Abstract: A study on the trophic spectrum of three species of lacertid lizards (Lacerta agilis, Lacerta trilineata and Podarcis muralis) was carried out, based on 20 specimens collected in the period 1967-1973 in various localities in Bulgaria. The analyzed data showed that the insects (Insecta) are the most numerous and the most frequently met among the alimentary components of the total amount of food of the studied stomachs (except for Lacerta agilis, where spiders are slightly predominating). The non-insect components consisted spiders and isopods. The largest niche breadth was recorded in Lacerta trilineata (8.25), followed by Podarcis muralis (5.20) and Lacerta agilis (3.44). The niche overlap between the three species (pair-wise comparison) showed medium values and in our opinion there should not be any serious competition for food resources at the places withsympatric distribution.
Problems and tendencies in management optimisation of hospital sector within health care system of Republic of Bulgaria
M.G. Stoycheva
Marketing ì Mened?ment Innovacìj , 2013,
Abstract: The aim of the article. The purpose of this article is to analyze the specifics, priorities and tendencies of the reforms in hospital sector management within the health care system of Republic of Bulgaria, the hospital care organization practices in relation to the National discussions on issues of hospital sector of the health care system.The results of the analysis. The accession of Republic of Bulgaria to the EU has created new conditions in defining the priorities in the area of public health care, including hospital medical aid. Summarizing, accumulation and transfer of experience in reforming of health care systems of the European Union member states, development of unified requirements, harmonization of legislation, financing, structure of functioning and management of hospital care within the health care system, lead to the need of deep analysis of situation, strategic priorities renewal, management optimization of whole health care system, and in particular the hospital care system in Republic of Bulgaria.In the article the author analyses the research and publications of some major materials, regulations and documents, which provided the basis for the reforms in the health care management system in Republic of Bulgaria in its continuing integration into the pan-European system. Illustrating current situation analysis, the author shares the opinion that the most important part in the organization of common management system in health care is the sector responsible for the development of hospital financing.The author pays special attention to the issues of economic activity of health care institutions.The author cites a number of documents of the National Centre for Medical Information (NCMI) noting that leading specialists of the Centre: .Dikov, R.Kolarova, T.Hundurzhievhave prepared detailed reports on economics 2001-2008 and comparative analysis of the medical institutions operation as well as those for outpatient care in Republic of Bulgaria over the period 2001-2009, published in NCMI Bulletin No10. The analysis of the published report coincides with the general development trend in the area of health care in the EU and corresponds to the hospital care development forecasts in theRepublic of Bulgaria to 2014. The priorities of financing hospital care in the EU and theRepublic of Bulgaria are discussed by G.Komitovand, S.Genev.Considerable attention is paid to health care issues in the hospital sector of Bulgaria. These are analyzed in the context of European reality and priorities, discussed at regular scientific and practical forums. As an
Freshwater crabs preyed on by the Eurasian Otter Lutra lutra in a river habitat of southern Bulgaria
Dilian Georgiev,Slaveia Stoycheva
Hystrix : the Italian Journal of Mammalogy , 2006, DOI: 10.4404/hystrix-17.2-4370
Abstract: During spring and summer 2005-2006, 141 remains of crabs (Potamon ibericum) eaten by the Eurasian otter (Lutra lutra) were collected from an eight kilometre long stretch of the River Maritza (the largest river in southern Bulgaria). Measuring of the carapaces width was chosen, carapaces being the better preserved part of the exoskeleton (80% of occurrences). An equal sample of live crabs was measured in the study area to investigate otter size selection. Mean carapace width found in the remains was 28.6 mm. Otters showed a preference for crabs larger than 20 mm (adults and sub-adults), clearly selecting those larger than 30 mm. Riassunto Granchi d’acqua dolce Potamon ibericum predati dalla Lontra Lutra lutra in un tratto fluviale della Bulgaria meridionale In primavera ed estate 2005-2006, lungo un tratto del fiume Maritza, presso Plovdiv (Bulgaria meridionale), sono stati raccolti 141 resti di predazione della Lontra sul granchio di acqua dolce (Potamon ibericum), costituiti per 80% da carapaci. Per indagare la selezione di taglia, si è quindi scelto di misurare la larghezza del carapace degli individui predati e di confrontarla con un campione equivalente di misure effettuate su crostacei vivi rinvenuti nel tratto fluviale indagato. La larghezza media del carapace degli individui predati dalla lontra è risultata pari a 28,6 mm. La lontra sembra selezionare i granchi di dimensioni maggiori (larghezza del carapace: >30 mm), corrispondenti ad individui adulti di entrambi i sessi.
Habitats, Distribution And Population Density Otter Survey In the Western Rhodopes Mountains (Southern Bulgaria)
Georgiev D.,Stoycheva S.
IUCN Otter Specialist Group Bulletin , 2006,
Abstract: The aim of our study was to investigate the otter habitats, their conditions in the Rhodopes Mountains (Bulgaria) and the effect on the otter distribution and population density. The investigation was carried out during the period 2004-2006.The continually used (core) habitats were: 1. large high mountain dams combined with headstreams. These were all at altitudes above 1000 meters. The effect of ecotone between the two habitats (dams and headstreams) ensures food supply, shelter and space throughout the year. The otter was found in all such dams in the Western Rhodopes: Golyam Beglik, Shiroka Polyana and Batak. When all the bankside of Golyam Beglik Dam (21.8 km) was searched, only one possible resident female was found. On Batak Dam (30.0 km), there were three possible resident females and one adult male; 2. Medium sized rivers. The otter was found in all such rivers in the Rhodopes. On a stretch of Chaya River between Jugovsko Hanche and Asenovgrad Town (14.5 km), two possible resident females, one adult and one sub-adult male, were recorded. On the Parvenetzka River, there were 2 possible resident female otters per 24 river kilometres; 3. Large Dams with steep banks in the lower parts of the mountain. The otter was found at Dospat Dam; no data for the population density was estimated.Temporarily used habitats and bank vegetation associations were also assessed according to their usage by the otters in the area and their conservation status.
Determination of Anodized Aluminum Material Characteristics by Means of Nano-Indentation Measurements  [PDF]
Maria Datcheva, Sabina Cherneva, Maria Stoycheva, Roumen Iankov, Dimitar Stoychev
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.210196
Abstract: An aluminium AD-3 has been anodized under four different conditions, namely at low temperature (?5℃), room temperature (25℃), with and without sealing the anodized coating in boiling distilled water. The solution used for formation of alumina layer in all cases was an electrolyte containing 180 g/l sulphuric acid at a constant forming voltage (voltastatic anodizing). In order to assess the mechanical properties of the obtained anodic alumina layers a series of nanoindentation tests was performed employing different indentation procedures. The two mechanical characteristics of the alumina films, the indentation hardness (HIT) and the indentation modulus (EIT), were determined by means of the instrumented indentation and the Oliver & Pharr approximation method. All measurements were done on Agilent G200 Nanoindenter fitted with a diamond Berkovich type tip. Time dependent effects were investigated by tests with different peak hold time and different loading rate. The change of the mechanical properties with indentation depth was also examined. The effect of the working temperature during the growth of the alumina layers and the influence of the pore sealing on the mechanical properties are evaluated via comparison of the average load-displacement curves. The role of the temperature of the electrolyte and the sealing process during the formation of the alumina films, with respect to possible changes of their chemical composition and structure, are discussed in order to explain the observed differences in the measured load-displacement curves and the determined HIT and EIT.
Epidemiological Study of Hepatitis A in Plovdiv Region—Bulgaria, 2005-2008  [PDF]
Mariyana Stoycheva, Nikolay Vatev, Andrey Petrov, Chavdar Venchev, Maria Atanasova
World Journal of Vaccines (WJV) , 2011, DOI: 10.4236/wjv.2011.14017
Abstract: Background: Hepatitis A is a social disease and has great importance for public health in countries with high level of incidence rate. The problem is particularly serious for Bulgaria because the morbidity rate in the country is several times higher in comparison with the other countries of the European Union. The aim of the study is to establish the contemporary epidemiological characteristics of viral hepatitis A in Bulgaria. Methods: Analysis of the incidence rate and the age distribution has been done among two groups of the population differentiated depending on their hygienic living conditions: 1st group—living in bad hygienic conditions; 2nd group—living in good hygienic conditions. A large epidemic outbreak of hepatitis A with 1004 persons of Roma origin has been described. The comprehensive method for epidemiological research and serological methods for determining the diagnosis have been used. To study the risk factors the methods of case-control and multi-factor logistic regression are used. Results: Nine times higher incidence rate has been established in the 1st group 450/100,000 in comparison with the 2nd 50/100,000. The patients from the 1st group are predominantly children aged 5 - 9 years and from the 2nd adults aged 30 - 39 years. The level of significance of the risk factors for the biggest epidemic outbreak has been established—bad personal hygiene is of the greatest importance. The risk for travellers to countries and regions with high endemicity and during epidemic outbreaks has been shown. Conclusions: There are essential differences in the epidemiology of HAV between the groups with different hygienic living conditions. That is why the analyses of the incidence rate and age distribution of hepatitis A have to be done separately for different population groups. Recommendations for providing differentiated measures for prevention and control of hepatitis A among the two groups are given.
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