Коментар на отговорния редактор
Т. Иванова 4
II. Технологии за пречистване
Д. Трифонов, Н. Цонев, В. Воденичаров, Ог. Църноречки 14
А. Сотирова, Д. Гълъбова, Е. Василева-Тонкова, Е. Карпенко, А. Шульга 20
Особености на организацията на изследванията в биопроцесното инженерство. Част I. Обекти на изследванията и специфика на експерименталната дейност
Л. Николов 25
III.Биоинформатика и биоавтоматика
В. Вавилин, Л. Локшина 35
В. Рангелова, Ст. Господинов, А. Панделова 44
IV. Лесобиология и лесотехника
Е. Руменина, В. Димитров 53
V. Екологично и устойчиво земеделие
Ст.н.с. I ст. инж. М. Цветанов 70 г 67
VII. Екологични институции и организации
Комитет за борба с шума
Т. Петков 68
VIII.. Информационни материали от чужбина 69
“Svet” space greenhouse – first steps in the biosphere creation in space conditions
Д. Трифонов, Н. Цонев, В. Воденичаров, Ог. Църноречки
Fine bubble aeration diffuser for wastewater treatment tanks
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.
А. Сотирова, Д. Гълъбова, Е. Василева-Тонкова, Е. Карпенко, А. Шульга
Effects of a biosurfactant-rhamnolipid on bacterial growth and protein release
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.
Peculiarities of the research organization in bioprocess engineering. Part 1. Objects of investigation and specificity of experimental work
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.
В. Вавилин, Л. Локшина
Modelling of food waste anaerobic digestion in one-stage digester under waste and microorganisms spatially separated
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
Е. Руменина, В. Димитров
Spatial modelling of the health status of the Chouprene biosphere reserve forests
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 meeting the
demands of food. Increasing of food production
on the basis
of expanding the cultivated agricultural areas
is limited. Hence,
on the basis
of new technologies
is a possible
from the sphere
of science into the sphere
of industry. However, some moral and legal
issues have arisen. All this
problems are discussed
in the paper.