T. Ivanova 4
II. Technologies for depolution
D. Trifonov, N. Tzonev, V. Vodenicharov, O. Tzarnorechki 14
A. Sotirova, D. Galabova, E. Vasileva-Tonkova, E. Karpenko, A. Shulga 20
III. Bioinformatics and bioautomatics
V. Vavilin, L. Lokshina 35
V. Rangelova, St. Gospodinov, A. Pandelova 44
IV. Forest biology and forest engineering
A. Alexandrov, D. Pandeva 49
E. Roumenina, V. Dimitrov 53
V. Ecological and sustainable agriculture
G. Kosturkova 60
Prof. M. Tsvetanov – 70 years 67
VII. Ecological institutions and organisations
The Committee for Noise Control
T. Petkov 68
VIII. Information materials from abroad 69
D. Trifonov, N. Tzonev, V. Vodenicharov, O. Tzarnorechki
Abstract. Fine bubble aeration diffusers are the most efficient means of transferring oxygen into process water and wastewater. A fine pore disc diffuser is developed with membrane of special HD-PE material and provides excellent chemical and thermal properties for the most challenging environments.
The HD-PE diffuser element is with open pores throughout the solid plate and creates micro-bubbles, that results in increased oxygen transfer efficiency.
A. Sotirova, D. Galabova, E. Vasileva-Tonkova, E. Karpenko, A. Shulga
Abstract. The biosurfactant-rhamnolipid PS from Pseudomonas sp. S-17 contains a unique natural complex of a biosurfactant and a biopolymer-alginate with high surface and emulsifying activities. The biosurfactant is a mixture of two homologous extracellular glycolipids.Effects of a novel biosurfactant-rhamnolipid PS in batch cultures of Ps. aeruginosa, E. coli and B. subtilis on the growth, extracellular protein levels and cell permeabilization were studied. The biosurfactant was shown to have a neutral or detrimental effect on the growth of Gram (+) strains and it was dependent on the surfactant concentration. The biosurfactant PS produced effects well expressed in vivo as well as in vitro on the B. subtilis 168 culture. The growth of Gram (-) strains was not influenced by the presence of biosurfactant in the media.
Abstract. Peculiarities of the research organization in the field of Bioprocess Engineering are revealed. In the Part 1. it is made on the basis of comparative analysis of the objects of R&D activity and experiments in Bioprocess Engineering with those of other sciences, such as Chemistry, Biology and Chemical Engineering. The next parts of this study treat the implementation of the Program-Target Method and the System Approach to the organization activity, emphasizing on its specificity of each of the stages in the research development. Some considerations about the improvement of R&D activity organization in the field of Bioprocess Engineering are made.
V. Vavilin, L. Lokshina
V. Rangelova, St. Gospodinov, A. Pandelova
Abstract: A hybrid biosensor for catechol concentration measurement is investigated. There is a cyclic reaction for the substrate which increases biosensor's sensitivity. A tissue from potato plant and mushroom is used as an active membrane and L-ascorbic acid is a non-measurable substrate. An oxygen electrode is a based transducer. For hybrid biosensors with cyclic enzyme-chemical reaction, experimental transfer functions are obtained and coefficient of amplification is calculated.
A. Alexandrov, D. Pandeva
Abstract: The conifer forests in Bulgaria cover about 1/3 of the afforested area and they are composed of 12 indigenous species: 5 of genus Pinus, 4 of genus Juniperus and by one of the genera Picea, Abies and Taxus. They are distributed mainly in the mountainous regions, which determines their great anti-erosion and water-protection role. The area of the seed stands from indigenous conifer species as percentage of the area of the conifer forests is 2% but in the last decades the afforestation with conifer species shows tendency to decrease.
E. Roumenina, V. Dimitrov
Abstract: The paper deals with the problem of influence of relief characterisitics on health status of old-growth spruce and beech forest formations in Chouprene biosphere reserve. A modeling procedure is developed based on 3D and spatial analysis in a geographic information system. During the modeling new thematic layers are generated and thematic maps are composed. Quantitative results are obtained about the presence of a relation between the health status of spruce and beech formations and relief characteristics.
Abstract: The Global population is
estimated to reach 8 billion people by 2020 creating a problem in
demands of food. Increasing of food production on the basis of
cultivated agricultural areas is limited. Hence, increasing
the basis of new technologies is a possible solution. Biotechnologies
developed rapidly passing from the sphere of science into the sphere of
industry. However, some moral and legal issues have arisen. All this
are discussed in the paper.