Search results

1

Horizontal and vertical distribution of Copepoda in the southern part of the Drake Passage and in the Bransfield Strait (BIOMASS-SIBEX1983/1984)

100%

Żmijewska M. I., Żmijewska M. I.

Polish Polar Research

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1987

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vol. 8

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issue 4

2

Bacterioplankton in the coastal zone of the gulf of Gdansk

100%

Maciejowska M., Bocwinska G.

Oceanological Studies

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1996

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vol. 25

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issue 1-2

115-124

EN

The bactrioplankton in the inshore zone of the Gulf of Gdansk in the vicinity of Gdynia, Orlowo and Sopot was investigated in 1991-1993.The numbers of colony-forming bacteria (CFU), the total bacteria number (TBN), their biomass (BBM) and bacterail production (BP) were determined.THe changes in TBN, BBM and activity of the bacterioplankton during their annual cycle corresponded to the growth dynamics of phytoplankton.

3

Glutathione - possibility of microbial biosynthesis and importance

100%

Udeh K. O., Achremowicz B.

Biotechnologia

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1993

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issue 1

68-76

EN

This paper reviews possibility of glutathione synthesis by microorganisms and its role in living organisms. Glutathione as a tripeptyde containing the -SH and gamma-glutamyl bonds appears to be not only an alternative source of cysteine but also participates in various vital physiological processes. This ubiquitous compound is presenthly in use as a medicament or antidote. Therefore, seachring for alternative means of this production besides the known conventional chemical method is important from biotechnological and economical viewpoint. Also, biomass with elevated content of glutathione could be used as dietary supplement to feeds and foods, cellular enrichment, oxidative and reductive processes and so on in vivo.

4

Enzymatic hydrolysis of plant mannans

100%

Prendecka M., Rogalski J., Szczodrak J.

Biotechnologia

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2005

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issue 1

61-78

EN

Mannan, as compounds of plant biomass, seem to be a very useful feedstock for the effective utilization in biotechnology. This is due to their abundance and renewability as well as the possibility of producing various chemical by-products, fuels, fodder and food products from this source. On the other hand, the enzymatic removal of mannans from cellulosic pulps and coffee extracts by mannanases is very important for the production of high quality paper and instant coffee. This review article presents new trends in the investigations on plant mannans and their enzymatic hydrolysis by mannanases of different origin. Particular emphasis has been laid on catalytic properties and molecular structure of different enzymes of mannanolytic complex, and on the mechanisms of their regulation and adsorption on wood fibers as well as on genes encoding particular enzymes. Most promising prospects for the practical applications of mannanases are also discussed.

5

The distribution, species composition and abundance of Enteromorpha spp. in the Gulf of Gdansk

100%

Haroon A. M., Szaniawska A., Plinski M.

Oceanological Studies

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1999

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vol. 28

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issue 1-2

31-39

EN

The variations in distribution, species composition, biomass and water content of Entero-morpha spp. in the Gulf of Gdansk in relation to sampling stations and season are discussed. Only four Entero-morpha species were identified in the samples collected, the most frequent being E. intestinalis (L.) Link. The species composition was found to vary in relation to sampling stations and seasons. The abundance of Enteromorpha spp. varied at different stations with a maximum at Puck variations in biomass were observed. Although Enteromorpha spp. were characterised by a high water content (96.56?0.40% of WW), no statistically significant variations in the water contents of these species with respect to sampling stations could be detected. Although there was a tendency towards seasonal changes, these occurred within a narrow range.

6

Macrobenthos of the Gdansk, Gotland and Bornholm Basins in 1978-1993

88%

Osowiecki A., Warzocha J.

Oceanological Studies

|

1996

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vol. 25

|

issue 1-2

137-149

EN

The macrobenthos in the Gdansk Basin and southern parts of the Bornholm and Gotland Basins was studied from 1978-1993 to document changes in the structure of benthic communities.Recolonisation following inflows of saline water was observed in the deep bottom habitat.Fluctuaction in microfauna abundance and biomass were recorded in the shallow water habitat, but no trend could be detected.No permanent macrofauna was encountered in the deepest part of the Bornholm and Gdansk Basins.

7

Density, biomass, and distribution of benthic invertebrates in the mid-lake zone of the coastal Lake Gardno

88%

Dobrowolski Z.

Oceanological Studies

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2001

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vol. 30

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issue 1-2

39-58

EN

The mean density (4.2 ? 103 ind. m-2) and mean biomass (10.8 g wet weight m-2) of the mid-lake zoobenthos in the mixo-oligohaline Lake Gardno were consistent with the respective ranges typical of freshwater, polymictic, and strongly poly-trophic lakes of northern Poland. The major components of the Lake Gardno macrozoobenthos were tubificid oligochaetes and chironomid larvae, the latter dominating in terms of abundance and biomass. Neomysis integer (Leach) was the sole and numerically scant marine invertebrate in the Gardno mid-lake macro-zoobenthos. Biodiversity, taxonomic composition, dominance structure as well as densities and biomass of the macrozoobenthos studied showed considerable spatial variation. The lake-river contact zone exhibited the presence of the ecotone effect. Dynamics of the abundance and biomass of the benthic invertebrates inhabiting that zone were markedly different from those found in other mid-lake habitats of the Gardno.

8

Eutrophication in the southern Baltic Sea between 1989-1998

88%

Lysiak-Pastuszak E., Niemkiewicz N. E., Niemkiewicz E., Dragas D. N., Dragas N.

Oceanological Studies

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2000

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vol. 29

|

issue 4

27-41

EN

In the Baltic Sea the process of eutrophication - increasing productivity - has became accelerated in the recent century and presently it stands the major ecological problem of this sea. One of the characteristic symptoms of eutrophication is an increase of nutrient reserves in the euphotic layer during winter accumulation, providing favourable feeding conditions for the intensive development of spring phytoplankton population, the main source of organic material in the marine ecosystem. In this study an attempt was undertaken to correlate the variability of biological parameters (phyto-plankton biomass and chlorophyll concentration) determined between 1989-1998 with chemical (nutrient concentrations in winter, oxygen saturation) and physical ones (water transparency). The parameters under scrutiny are measured regularly in water of the Bornholm Deep, SE Gotland Deep and Gdansk Deep within the framework of the Baltic Sea monitoring programme. The mean annual biomass of phytoplankton and mean annual chlorophyll content in the surface (0-10 m) layer were related to winter concentrations of phosphate, nitrate and silicate. Water saturation with oxygen during vegetation season was analysed in relation to biological parameters and the same analysis was carried out for water transparency. Statistically significant correlations between the analysed determinands were found in water of the Gdansk Deep and SE Gotland Basin but not for the Bornholm Deep.

9

Microbiological processes taking place in Dobczyce reservoir during spring water bloom

75%

Bednarz T., Starzecka T.

Oceanological Studies

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1998

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vol. 27

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issue 2

13-21

EN

In waters of Dobczyce reservoir, the organic carbon content, biomass of algae and bacteria, respiration of bacteria and respiration of aquatic organisms (measured by oxygen uptake), and energetic expenditures per unit of bacterial biomass ('costs of maintenance') at the beginning of spring water bloom (May, 1996) caused by Nitzschia palea (Kutz.) W. Sm. were greater than those in the second phase of bloom. However, photosynthesis of algae was greater in the second one. In the surface layer of bottom sediments, the greatest values of measured parameters were noted in the second phase of water bloom but the 'costs of maintenance' of bacteria reached maximum values one week after of water bloom break.

Refine search results

Horizontal and vertical distribution of Copepoda in the southern part of the Drake Passage and in the Bransfield Strait (BIOMASS-SIBEX1983/1984)

Bacterioplankton in the coastal zone of the gulf of Gdansk

Glutathione - possibility of microbial biosynthesis and importance

Enzymatic hydrolysis of plant mannans

The distribution, species composition and abundance of Enteromorpha spp. in the Gulf of Gdansk

Macrobenthos of the Gdansk, Gotland and Bornholm Basins in 1978-1993

Density, biomass, and distribution of benthic invertebrates in the mid-lake zone of the coastal Lake Gardno

Eutrophication in the southern Baltic Sea between 1989-1998

Microbiological processes taking place in Dobczyce reservoir during spring water bloom