Wyniki wyszukiwania

1

Evaluation of selected polarographic techniques for the determination of uranium in sea and inland waters

100%

Szefer P.

Oceanologia

|

1981

|

tom 13

2

Binding of uranium by yeast cell wall polysaccharides

100%

Chmielowski J., Woznica A., Klapcinska B., Pytlak M., Piech W.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1994

|

tom 42

|

nr 2

3

Distribution of uranium in the post-granitic siliceous veins of Gabal Qattar, Northeastern Desert, Egypt

100%

Ahmed F. Y.

Bulletin of the Polish Academy of Sciences. Earth Sciences

|

1999

|

tom 47

|

nr 4

4

Natural radioactivity in underground waters

84%

Walencik A., Kozlowska B., Dorda J., Szlapa P., Zipper W.

Polish Journal of Environmental Studies

|

2010

|

tom 19

|

nr 2

461-465

Nine underground water springs from the Szczawno-Jedlina health resort and one from Zagorze Śląskie were investigated for natural radioactivity content (²²²Rn, ²²⁶,²²⁸Ra, ²³⁸,²³⁴U). In order to obtain the necessary data, two different nuclear spectrometry techniques were applied: a liquid scintillation counter that enabled us to determine ²²²Rn and ²²⁶,²²⁸Ra isotope content, and α spectrometer for measurements of uranium isotopes (²³⁴,²³⁸U) in investigated samples. The activity concentrations of ²²²Rn in investigated samples varied from 6 Bq/l to 227 Bq/l. For radium isotopes the concentrations ranged from 13 mBq/l to 808 mBq/l for ²²⁶Ra and from below 30 mBq/l to 184 mBq/l for ²²⁸Ra. The activity concentrations for uranium isotopes varied from 2.4 mBq/l to 964 mBq/l for ²³⁴U, and from 1.0 mBq/l to 725 mBq/l for ²³⁸U. The isotopic ratios between uranium and radium isotopes (²²⁶Ra/²²⁸Ra, ²²⁶Ra/²³⁸U, ²³⁴U/²³⁸U) and annual effective doses due to these isotopes’ consumption were evaluated. Risk levels due to carcinogenic effects of ²²⁶,²²⁸Ra and ²³⁴,²³⁸U radionuclides consumed with water were estimated.

5

On the cccurence of uranium and thorium in the biosphere of natural waters. Part II. Uranium and thorium in corals, molluscs and fish

84%

Szefer P., Ostrowski S.

Oceanologia

|

1981

|

tom 13

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Factors affecting background gamma radiation in an urban space

84%

Nowak K. J., Solecki A. T.

Journal of Elementology

|

2015

|

tom 20

|

nr 3

Terrestrial background gamma radiation in urban surroundings depends not only on the content of radionuclides in the soil and bedrock, but also on levels of radionuclides in building materials used for the construction of roads, pavements and buildings. The aim of this study was to characterize an outdoor absorbed dose rate in air in the city of Wroclaw and to indicate factors that affect the background gamma radiation in an urban space. Gamma spectrometric measurements of the radionuclide content and absorbed dose rate in air were performed by means of portable RS-230 gamma spectrometers and at sites with various density of buildings, in the city center and in more distant districts, over pavements and roads as well as in a park, a cemetery and on four bridges. Measurements were performed at a 1-meter height. The absorbed dose rate in air ranged from 19 to 145 nGy h-1, with the mean of 73 nGy h-1. This paper implicates that terrestrial background gamma radiation depends on the type of building material used for the construction of roads and pavements and on the density of buildings shaping the geometry of the radiation source. The highest background gamma radiation was observed in the center of the city, where buildings are situated close to each other (nearly enclosed geometry) and pavements are made of granite. The lowest background gamma radiation was noticed on bridges with nearly open field geometry. Additionally, three profiles at the heights of 0.0, 0.5 and 1.0 m were arranged between two opposite walls of the hall of the Main Railway Station in Wroclaw, where the floor is made of various stone slabs. The results indicated that the absorbed dose rate in air varied, depending on the type of building material, but became averaged along with the height.

7

On the occurence of uranium and thorium in the biosphere of natural waters. Part I. Uranium and thorium in plankton and inherent plants

84%

Szefer P., Ostrowski S.

Oceanologia

|

1981

|

tom 13

8

The inflow of 234U and 238U from the River Odra drainage basin to the Baltic Sea

67%

Skwarzec B., Tuszkowska A., Borylo A.

Oceanologia

|

2010

|

tom 52

|

nr 4

In this study the activity of uranium isotopes 234U and 238U in Odra river water samples, collected from October 2003 to July 2004, was measured using alpha spectrometry. The uranium concentrations were different in each of the seasons analysed; the lowest values were recorded in summer. In all seasons, uranium concentrations were the highest in Bystrzyca river waters (from 27.81±0.29 Bq m−3 of 234U and 17.82±0.23 Bq m−3 of 238U in spring to 194.76±3.43 Bq m−3 of 234U and 134.88 ± 2.85 Bq m−3 of 238U in summer). The lowest concentrations were noted in the Mała Panew (from 1.33±0.02 Bq m−3 of 234U and 1.06±0.02 Bq m−3 of 238U in spring to 3.52 ± 0.05 Bq m−3 of 234U and 2.59 ± 0.04 Bq m−3 of 238U in autumn). The uranium radionuclides 234U and 238U in the water samples were not in radioactive equilibrium. The 234U/238U activity ratios were the highest in Odra water samples collected at Głogów (1.84 in autumn), and the lowest in water from the Noteć (1.03 in winter and spring). The 234U/238U activity ratio decreases along the main stream of the Odra, owing to changes in the salinity of the river’s waters. Annually, 8.19 tons of uranium (126.29 GBq of 234U and 100.80 GBq of 238U) flow into the Szczecin Lagoon with Odra river waters.

9

Polonium, uranium and plutonium radionuclides in aquatic environment of Poland and Southern Baltic

67%

Skwarzec B.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2009

|

tom 13 part II

In the paper were presented the results of study for determination of natural (polonium 210Po, uranium 234U and 238U) and artificial (plutonium 238Pu, 239+240Pu and 241Pu) alpha radionuclides in aquatic environment of Poland and southern Baltic Sea as well as the recognition of their accumulation in marine trophic chain. The obtained results indicated that Vistula and Odra as well as Rega, Parsęta and Słupia are important sources of analyzed radionuclides in southern Baltic Sea. Total annual runoff of polonium, uranium and plutonium from Vistula, Odra and Pomeranian rivers to the Baltic Sea was calculated as about 95 GBq of 210Po, 750 GBq of 234+238U and 160 MBq of 238+239+240Pu. Investigation on the polonium 210Po, uranium 234U and 238U, as well as and plutonium 238Pu, 239+240Pu and 241Pu. concentration in Baltic biota revealed that these radionuclides, especially polonium and plutonium, are strongly accumulated by some species. The results indicate that the Baltic organisms accumulate polonium and plutonium from environment and the bioconcentration factors (BCF) range from 25 to 27 000. The Baltic Sea algae, benthic animals and fish concentrate uranium only to a small degree. In Baltic sediments, the concentration of uranium increases with core depth and it is connected with the diffusion of 234U, 235U and 238U from sediments via intersticial water to bottom water. The values of 234U/238U activity ratio in the sediments indicated that the possible reduction process of U(VI) to U(IV) and the removing of autogenic uranium from seawater to sediments in the Gdańsk Deep and Bornholm Deep constitutes a small part only.

10

Sputum screening for lung cancer in radon exposed uranium miners: a comparison of semi-automated sputum cytometry and conventional cytology

67%

Marek W., Richartz G., Philippou S., Marek L., Kotschy-Lang N.

Journal of Physiology and Pharmacology. Supplement

|

2007

|

tom 58

|

nr 5

11

Uranium exposure induced reactive oxygen species and nitric oxide generation in Arabidopsis thaliana

67%

Tewari R., Horemans N., Nauts R., Wannijn J., Plevoets J., Van Hees M., Vandenhove H.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

12

Biogeochemistry of uranium in the Southern Baltic ecosystem

67%

Borylo A., Skwarzec B.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

|

2013

|

tom 17

The determination of uranium isotopes in different components of the Southern Baltic (sediments, soil, birds, river) is presented and discussed in this paper. The Baltic Sea is one of the most polluted water regions in the world. On the basis of the studies was found that the most important process of uranium geochemical migration in the Southern Baltic Sea ecosystem is the sedimentation of suspended material and the vertical diffusion from sediments into the bottom water. Considerable amounts of uranium isotopes are introduced into the Baltic waters together with annual inflows of saline and well-aerated waters from the North Sea. Also very high uranium concentrations are the result of weathering and erosional processes of the rocks (e.g. Sudetic rocks) which contain elevated natural concentrations of this radionuclide. Considerable amounts of uranium isotopes are introduced into the Baltic waters together with annual inflows from the Vistula and Oder rivers, also from saline and well-aerated waters from the North Sea. The results of many our studies confirm the significant role of human activities and phosphogypsum stockpile in Wiślinka as a source of these isotopes in southern Baltic.

13

Phytosociological studies on tree species of Peddagattu and Sherepally area, a proposed site for Uranium mining project, Nalgonda district, Telangana State, India

67%

Baleeshwar Reddy A., Hanumantha Rao V., Vasudeva Rao V., Vijava Bhasker Reddy A.

International Letters of Natural Sciences

|

2016

|

tom 50

The present study deals with the quantitative floristic inventory of Peddagattu and Sherepally area, Nalgonda district, Telangana State, India. The study resulted in documentation of 50 tree species belongs to 41 genera and 35 families. The families, Mimosaceae, Caesalpiniaceae and Fabaceae are dominated. Among the tree species Cassia fistula has showed highest IVI in Peddagattu, while in Sherepally Albizia amara has recorded highest IVI. Shannon–Wiener index (H') ranges from 2.41 to 3.03. The present study can serve as baseline information for phytosociolgical studies on tree species of Peddagattu and Sherepally area, a proposed site for Uranium mining project, Nalgonda district, Telangan State, India.

14

Radioactive mineralization in pegmatites, of Dara-Um Swassi, Area North Eastern Desert, Egypt

67%

Shalaby M. H., Osman A. M., Ali M. M., Ahamed F. Y., Ali B. H.

Bulletin of the Polish Academy of Sciences. Earth Sciences

|

2002

|

tom 50

|

nr 1

15

The genotoxicity of metals

67%

Wozniak K.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

16

Polonium, uranium and plutonium in the Southern Baltic Sea

67%

Skwarzec B.

Oceanological Studies

|

1997

|

tom 26

|

nr 1

Ograniczanie wyników

Evaluation of selected polarographic techniques for the determination of uranium in sea and inland waters

Binding of uranium by yeast cell wall polysaccharides

Distribution of uranium in the post-granitic siliceous veins of Gabal Qattar, Northeastern Desert, Egypt

Natural radioactivity in underground waters

On the cccurence of uranium and thorium in the biosphere of natural waters. Part II. Uranium and thorium in corals, molluscs and fish

Factors affecting background gamma radiation in an urban space

On the occurence of uranium and thorium in the biosphere of natural waters. Part I. Uranium and thorium in plankton and inherent plants

The inflow of 234U and 238U from the River Odra drainage basin to the Baltic Sea

Polonium, uranium and plutonium radionuclides in aquatic environment of Poland and Southern Baltic

Sputum screening for lung cancer in radon exposed uranium miners: a comparison of semi-automated sputum cytometry and conventional cytology

Uranium exposure induced reactive oxygen species and nitric oxide generation in Arabidopsis thaliana

Biogeochemistry of uranium in the Southern Baltic ecosystem

Phytosociological studies on tree species of Peddagattu and Sherepally area, a proposed site for Uranium mining project, Nalgonda district, Telangana State, India

Radioactive mineralization in pegmatites, of Dara-Um Swassi, Area North Eastern Desert, Egypt

The genotoxicity of metals

Polonium, uranium and plutonium in the Southern Baltic Sea