H. Najdenski 3-4
I. MAN AND
BIOSPHERE
G. Stoilov,
N.Nikolov, D. Stoilov
5-15
II.
ECOLOGICAL AND SUSTAINABLE AGRICULTURE
Characteristics of industrial product from
“Devnya Cement” AD for remediation of acid soils
S. Marinova, E.
Zlatareva, M. Banov, N. Katijotes 16-20
Influence
of heavy metal pollution on soil microorganisms
in urbocenosis
B. Malcheva
21-28
III.
FOREST ECOLOGY AND BIOLOGY
Investigation
on humus-carbonate soils in the Western Rhodope
Mountains
S.
Bogdanov 29-36
An
attempt to analyze the
variation of morphological traits of individuals in
populations of Impatiens
Glandulifera Royle
M. Georgieva, P. Glogov
37-42
Uranium
content in mineral water from Bulgaria
E. Geleva, D. Tonev, H.
Protohristov
43-49
D. Dimitrov, A. Demerdjiev, V. Pavlova, M. Shehadi, G. Dimitrova, N.
Goutev, D. Tonev
50-59
V. SPACE
TECHNOLOGY AND ENVIRONMENTAL
MONITORING
40th
anniversary of the Space program „Bulgaria-1300“
T. Ivanova
60-67
VI.
JUBILEE
Prof. Svetla
Marinova at the age of 70
68
VII.
SCIENTIFIC FORUMS
Ecological
Engineering and
Environment Protection with Youth Scientific Session and
MELiSSA Summer
University (EEEP'2021)
30 Sept. - 3 Oct. 2021, Varna, Bulgaria
69-75
Keywords: electrical infrastructure,
electrical power lines, securing, impacts on birds
Svetla
Marinova, Elena
Zlatareva, Martin Banov, Nicholas Kathijotes
Abstract.
Soil
acidity is one of the main problems of soil chemistry, as
the soil adsorbent is
composed entirely of acids with insoluble anions,
different in composition and
strength, etc. acidoid. The issues of acidity and liming
of soils were raised
in Bulgaria more than 60-70 years ago. “Devnya Cement”AD
produces the Restart
product, as an integral part of the process in the
installation of cement
clinker in a dry way and contains a high amount of calcium
oxide /lime material/.
The aim of the study is to characterize and evaluate the
industrial flow
Restart including agrochemical, chemical and physico -
chemical indicators. The
product was found to have a high neutralizing ability. It
is a fast-acting and
effective ameliorant, has the necessary qualities and its
effect as an
ameliorant on acid soils can be studied.
Keywords: ameliorant,
characteristics, neutralizing ability
Boyka Malcheva
Abstract: Urbogenic soils from
the region of Kardzhali
municipality with high concentrations of heavy metals – Pb,
Cd, Cu and Zn were
studied. The main share in the composition of total
microflora is occupied by
non-spore-forming bacteria and bacilli, which are most
actively involved in the
initial stages of self-cleaning of soils from heavy metals
and the destruction
of organic matter. Actinomycetes and micromycetes are most
strongly suppressed
by contamination with the studied trace elements. The
incidence of pigmented
microbes, as a protective mechanism against external chronic
stress conditions,
is highest in the most contaminated soils. No correlation
was found between the
content of heavy metals and the total microflora, which
again confirms the
adaptability of microbes to long-term soil contamination
with heavy metals, as
well as their self-cleaning capabilities.
Keywords:
urbogenic soils, heavy metals, microorganisms
INVESTIGATION ON HUMUS-CARBONATE SOILS IN
THE WESTERN
RHODOPE MOUNTAINS
Simeon Bogdanov
Abstract. In Bulgarian soil system and in the World Reference Base for Soil
Resources (WRB), Humus-Carbonate soils (Rendzinas) are
primitive soils (Leptosols) formed on calcareous rocks. The
paper presents
results from study on Rendzinas in the Western Rhodope
Mountains. The
soils are
situated in the Middle forest
vegetation zone (700 – 2000 m a. s. l.) of the Tracian
forest vegetation area.
The factors of soil formation and the soil properties have
been analyzed. Soil
fertility was determined on the base of soil depth, content
of humus, total N,
soil available water, pH, bulk density (Q), ratio C/N and
soil texture. The
bonitet of stands and the composition of tree species have
been used as
indicators of the soil silvicultural effect. Conformity
between soil properties
and vegetation development has been established.
Keywords: humus-carbonate soils,
factors of soil formation, soil
properties, vegetation development.
AN ATTEMPT TO ANALYZE THE
VARIATION
OF MORPHOLOGICAL TRAITS OF INDIVIDUALS IN POPULATIONS OF
IMPATIENS GLANDULIFERA ROYLE
Mira
L. Georgieva, Plamen Glogov
Abstract:
Changes in the morphology of
invasive alien species
(IAS) can serve as an indicator of the dynamics of their
populations and
ecological conditions in their habitats. The subject of the
present study is
the one-year IAS Impatiens
glandulifera
Royle, whose morphology and phenotypic variability are still
relatively
poorly studied. In the period August-September, 2020 the
morphological
characteristics of the populations of I.
glandulifera in 6 permanent sample plots
(PSP) were
studied. The
following morphological features were measured in each PSP in a random sample of 30
mature individuals:
Length of seed pod,
Number of
seeds per seed pod,
Number of
developed (fertile) seeds per seed
pod,
Number of undeveloped (sterile) seeds per seed pod,
Weight of developed seeds, Average weight of one fertile
seed, Stem
height, Number of blooming flowers,
Number
of flower buds. The results of the analysis of variance show
that the
variation of all morphological features by sample plots
(separate localities) is statistically significant. The “Fanny”
cluster analysis classified the observations by sum of
morphological features
into three cluster groups and highlighted the height of the
stem as a
morphological feature that could serve as an indicator for
monitoring studies
of changes in the morphology of populations of I. glandulifera and with the characteristics
of the habitat.
Keywords: variability,
morphology, invasive alien species,
Impatiens glandulifera.
URANIUM CONTENT IN
MINERAL WATER FROM BULGARIA
Elena
Geleva, Dimitar Tonev, Hristo Protohristov
Abstract: The uranium content
of 41 mineral water samples from
different districts in
Bulgaria was determined. The
results show that the concentrations range from ˂ 3.0 µg/L
to 860 µg/L.
Due to differences in the geological
structure of the aquifer, a large difference in values of
the radioactive
content was observed. The estimated
total indicative dose (TID) ranged from 2.5 µSv/y to 706 µSv/y. Except one value, TID do not exceed the
permissible limit of 100 µSv/year.
The obtained new results are used to
assess the radiological
status of the
investigated waters. They will support timely and adequate
measures to reduce
the harmful impact of ionizing radiation on the population
in cases of
increased radioactivity.
Keywords: Mineral water,
uranium, total indicatice dose.
CYCLOTRON CENTER AT THE INSTITUTE FOR
NUCLEAR RESEARCH AND NUCLEAR
ENERGY AT THE BULGARIAN ACADEMY OF
SCIENCES
Abstract: The Institute for
Nuclear Research and Nuclear Energy at the Bulgarian Academy
of Sciences is
working on the construction of a National Cyclotron Center.
Various fields of
science will be the subject of research interest, such as:
radiobiology,
nuclear physics, nuclear energy, as well as the production
of radioisotopes and
radiopharmaceuticals for the purposes of nuclear medicine.
When creating a new
accelerator complex, it is crucial to select the necessary
team of qualified
personnel. The publication shows that the activity of human
resources is an
important part of achieving the planned levels of
organizational structure, with
a clear hierarchy of management of the cyclotron center. A
summary of the
results obtained so far from the analysis of the radiation
protection of the
facility through Monte Carlo simulations is made.
Keywords: cyclotron
TR-24, medical
radioisotopes, human
resources, radiation protection.
40TH
ANNIVERSARY OF THE SPACE PROGRAM
„BULGARIA-1300“
Tania
Ivanova
Abstract:
One of the most important Bulgarian
scientific
achievements in the space research was the "Bulgaria-1300" program,
realized
in 1981 in honor of the 1300th anniversary of the founding
of our
country, including two research satellites.
The first satellite "Interkosmos-Bulgaria-1300"
was launched on 07.08.1981 into
nearly polar orbit with an altitude of about
900 km with a complex
of 11 Bulgarian scientific instruments for space plasma
measurement and studying
the ionosphere-magnetosphere
interactions, as well as the laser reflector for geodetic
measurements. The
second satellite "Meteor-Priroda" with scientific
instrumentation for remote sensing, developed with the
participation of Bulgarian
scientists, was launched on 10.07.1981 in
650 km sun-synchronous orbit. The scientific results from
the processed satellite information are world wide
used and published up
to now.
Keywords: Intercosmos program, "Bulgaria-1300" program,“Interkosmos-Bulgaria-1300”
satellite, “Meteor-Priroda” satellite