18 research outputs found
Social Security, Labour Market and Restructuring: Current Situation and Expected Outcomes of Reforms
Evaluation of the aluminium load in the aquatic environment of two small rivers in the Baltic Sea catchment area
The study covered the aquatic environment of two small rivers in Western Pomerania, Poland,
such as the Czerwona and the Grabowa. Its purpose was to determine aluminium bioaccumulation
in the aquatic environment by testing water, bottom sediments and aquatic plants. Samples
were taken in the summers of 2008-2011. pH, electrolytic conductivity and aluminium concentration
were determined in water samples, while the sediment and plant samples were submitted
to analyses of the aluminium content. The water pH oscillated between 6.04 and 8.95, while
the electrolytic conductivity ranged from 440 to 1598 μS cm-1. The aluminium concentration in
the river water was up to 0.138 mg Al dm-3 in the Czerwona and up to 0.425 mg Al dm-3 in the
Grabowa. The maximum aluminium content in the bottom sediments was 47.01 mg Al kg-1 in
the Czerwona River and 26.15 mg Al kg-1 in the Grabowa River. The maximum aluminium content
in the aquatic plants sampled from the Czerwona was 91.63 mg Al kg-1, and from the Grabowa
– 1,077 mg Al kg-1. The bioconcentration factor (BCF) of aluminium for the Czerwona River
ranged from 5.06 to 24,052, and for the Grabowa River – from 1.10 to 70,132. The
concentration factor (CF) of aluminium in the bottom sediments oscillated between 66.72 and
23,492 in the Czerwona River and between 14.81 and 2,763 in the Grabowa. The aluminium
content in the two rivers was relatively low in the water, sediments and aquatic plants, which
is typical of environments without strong anthropopressure. The values fell within the limits set
by environmental water quality standards. The low aluminium accumulation degrees in the
biotic and abiotic components indicate that the environments of the two rivers have a low load
of aluminium compounds
Changes in Ferritin H- and L-Chains in Canine Lenses with Age-Related Nuclear Cataract
1220 N State College Boulevard
Anaheim, CA 92806interior, view towards rear of prayer hall, 201
Налоги и налогообложение в агропромышленном секторе
Представлены задачи, отражающие основные особенности налогообложения в Республике Беларусь. Содержит тесты по основным видам налогов.
Для студентов специализации 1-25 01 07 15 «Экономика и управление на предприятии агропромышленного комплекса» дневной и заочной форм обучения