В. Янчев, И. Иванова, Р. Недков 4
Н. Николов 12
А. Симеонова, Ж. Бекярова, Р. Чутуркова 25
II. Микроорганизми и околна среда
Н. Крумов, А. Ангелов, К. Постен 31
Б. Янгьозов 40
М. Любенова, Р.
Недков, И. Иванова, А. Шикаланов, М.
Захаринова, Н. Георгиева,
М. Димитрова, Е. Иванова, В. Янчев, К. Радева, Н. Станкова, Р. Цонева 45
IV. Възобновяеми енергийни източници и биогорива
К. Лахчев, М. Дойнова 51
Ж. Нотон, В. Лазаров, Л. Стоянов 64И. Иванов, А. Саравананакумар, К. Кумар, П. Калейчев 75
state of THE
Abstract: In this paper we
describe the actual state of Danube Delta Biosphere Reserve, using
and GPS data. The Danube Delta Biosphere Reserve is situated in the
south-eastern part of
АКУСТИЧНИ ПРОБЛЕМИ НА ТРАМВАЙНИЯ ТРАНСПОРТ В ГОЛЕМИТЕ ГРАДОВЕ
ACOUSTICAL PROBLEMS OF TRAM TRAFFIC IN BIG CITIES
Abstract: Tram traffic is one of the main sources of noise in cities. Compliance with noise level standards at the premises of buildings located on bilateral narrow streets is a serious problem. Its solution will require precise acoustical calculations which take into account all factors. The existing legislation does not meet the complexity of the problem. In the material are exposed new solutions to acoustic problems of tram transport in cities.
of the river Kamchiya impact
Abstract: The status of river Kamchiya was investigated for 2006- 2010y. period at two monitoring stations -“Poda” and “the Mouth” which are the nearest one to the Varna Black sea coast. Ammonium, nitrite and nitrate nitrogen; phosphate; Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), water hardness and pH were analyzed. With regard to the national threshold limits for II category water body the river was characterized with high oxygen concentrations, low ammonium, nitrate and phosphate concentrations. Low biodegradable organic substances were determined according to the values of BOD5 and COD. High nitrite concentrations, approximately 3 times above the limits were measured at the monitoring stations for the period. Regarding the influence of the river over the sea coast status nutrients’ concentration above the threshold limits for coastal waters were measured. At the “Mouth” station the nitrite nitrogen was 3 times above the limit, the nitrate nitrogen from 1,2 to 1,8 times and the phosphates from 3 to 6 times, which exhibited considerable influence of the river over the sea coast.СРАВНИТЕЛНО ИЗСЛЕДВАНЕ НА ВЪЗМОЖНОСТИТЕ НА ДРОЖДЕВИ ЩАМОВЕ ДА АКУМУЛИРАТ КАДМИЕВИ ЙОНИ – ПЕРСПЕКТИВЕН ПОДХОД ЗА БЪДЕЩО БИОТЕХНОЛОГИЧНО ПОЛУЧАВАНЕ НА НАНОЧАСТИЦИ
Н. Крумов, А. Ангелов, К. Постен
STUDY OF YEAST STRAINS’ POTENTIAL TO ACCUMULATE CADMIUM IONS –
A PERSPECTIVE PATHWAY FOR FUTURE BIOTECHNOLOGICAL NANOPARTICLE FORMATION
Abstract. Nanoparticles’ unique properties and applications define the practical interest towards them and the consequent elaboration of different synthesis strategies. Understanding the process of biomineralization and the identification of microorganisms capable of producing nanoparticles under defined conditions, unveils new perspectives for the nanotechnology and facilitate its fusion with biotechnology. The main objective of the present scientific work was to compare selected biosynthetic and metabolic activities of yeast strains isolated from soil. As the bionanoparticle-formation mechanisms in yeasts are strain- and cultivation conditions-specific, the foreseen experiments aimed eventually to recognize and introduce new promising yeast strains with high potential for the synthesis of CdS bionanoparticles. Soil-isolated yeast strain designated as S. pombe NK05/2 demonstrated highest levels of specific cadmium accumulation – 8.8 and 13.75 mg.g-1 BDM (bio dry mass) for both media tested, and exhibit the best biosynthetic characteristics.
РЕЗУЛТАТИ ОТ ПРОТИВОЕРОЗИОННИТЕ ЗАЛЕСЯВАНИЯ В РАЙОНА НА КЪРДЖАЛИ
RESULTS OF ANTI-EROSION AFFORESTATIONS IN KARDZHALI REGION
Abstract: Forests take important part in the process of soil formation and protection. Devastation of plant vegetation, however, usually leads to the development of intensive erosion, which in the mountains can be limited only by restoration of forest cover. An example of vast areas of destroyed forests and eroded lands, followed by large-scale afforestation is the region of Kardzhali. Field measurement and analytical methods were used for analyzing the results of the plantations, established to control the erosion in the region. Silviculture processes, running in anti-erosion forest plantations, their species composition and their role in habitat restoration were investigated. The analysis results provide guidance for future management of these plantations to ensure their function to control the erosion, as well as selection of forest tree species for future afforestations accordingly to the specific characteristics of the region.
ИЗСЛЕДВАНЕ НА ЕКОЛОГИЧНАТА ДИНАМИКА НА ГОРСКАТА РАСТИТЕЛНОСТ В РАЙОНА НА ИЗТОЧНИ РОДОПИ НА БАЗАТА НА СПЪТНИКОВА, GPS И НАЗЕМНА ИНФОРМАЦИЯ
Любенова, Р. Недков, И.
Иванова, А. Шикаланов, М. Захаринова, Н. Георгиева, М. Димитрова, Е.
В. Янчев, К. Радева, Н. Станкова, Р. Цонева
STUDY ON ECOLOGICAL DYNAMICS
Abstract: In this paper a study of forest vegetation in the
ВЪЗМОЖНОСТИТЕ НА МИКРОВОДОРАСЛИТЕ ЗА ПРОИЗВОДСТВО НА БИОГОРИВА
К. Лахчев, М. Дойнова
MICROALGAE ARE PROMISING SOURCE OF BIOFUELS
Abstract: During the last decades microalgae emerge as promising organisms for industrial biofuel production. Microalgae are a large and diverse group of photosynthetic microorganisms capable to convert sun light and carbon dioxide into carbohydrates and oxygen. The reasons for steadily increasing attention to microalgae are their rapid growth and ability to accumulate high amount of lipids. Lipids can be easily extracted and used as biofuels without significant and expensive treatments. Additionally microalgae have some attractive characteristics such as their ability to utilize carbon dioxide from industrial gases and to purify waste waters. Microalgae can be cultivated on areas that are not suited for agricultural plants; their biomass is a subject of bio-degradation and can be used as food, feed and fine chemicals. However, most of the widely distributed species in nature can’t be used as biofuel donors, because they don’t possess the necessary qualities for inexpensive production. Promising species also occur, but they are objects of genetic manipulations with the purpose to be created ‘domesticated’ algae for biofuel manufacturing. This review describes some of the main microalgal species with biotechnological and genetic potential and the molecular manipulations for improving their growth rates and lipid content. The main difficulties that appear in front of scientists are also discussed.Key words: microalgae, biofuels, Chlorella, Chlamydomonas reinhardtii, genetic improvement
АНАЛИЗ НА ПОМПЕНО АКУМУЛИРАЩА ВОДНОЕЛЕКТРИЧЕСКА ЦЕНТРАЛА КЪМ СИСТЕМА С ВЕТРОГЕНЕРАТОР И ФОТОВОЛТАИК ЗА ВНЕДРЯВАНЕ В ЕЛЕКТРИЧЕСКАТА МРЕЖА
ANALYSIS OF PUMPED HYDROELECTRIC STORAGE FOR A WIND/PV SYSTEM FOR GRID INTEGRATIONG. Notton, V. Lazarov, L. Stoyanov
Abstract: This paper deals with the pumping storage system analysis. The water reservoir serves for daily and seasonal energy storage, thus basically solving the problem of energy storage, which is the biggest problem of wider use of renewable energy sources. The electrical energy produced in excess by the renewable energy system is converted in potential energy by pumping water to a higher elevation where it can be stored indefinitely and then released to pass through hydraulic turbines and generate electricity. The estimation of the stored energy, the nominal electrical power of the hydroelectric plant and the evaporation rate of the water reservoir is presented.
И. Иванов, А.
Саравананакумар, К. Кумар, П.
INITIAL RESULTS OF STUDIES AND POSSIBILITIES FOR BIOMASS GASIFICATION IN
use of biomass as energy source
has high priority in order to comply with the Kyoto Protocol for global
of the greenhouse emission. As result of scientific contacts and