Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 5

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  PHOSPHORUS
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1

Nitrogen and phosphorus compounds removal by immobilized activated sludge in Sequencing Batch Reactor

100%
Wojnowska-Baryla I., Stachowiak D., Klimiuk E.
Biotechnologia
|
1997
|
issue 3
78-87
EN
Activated sludge with enhanced ability of phosphorus storage and nitrification immobilized in alginate and alginate-PVA was applied to remove phosphorus and nitrogen from waste water. The activated sludge immobilized in alginate achieved higher efficiency of phosphorus removal. It was 18% higher than in the case of activated sludge. The rates of nitrogen removal by the activated sludge and the activated sludge immobilized in alginate were similar and amounted to 0.021 and 0.190 mg TN?g-1MLSS?min-1. For the activated sludge immobilized in alginate the nitrification rate was 6 times lower than for the activated sludge. However, in the activated sludge immobilized in alginate-PVA nitrification did not occur.
2

Temporal variations in phosphorus species in the surface layer of bottom sediments from the Gulf of Gdansk - preliminary research

100%
Graca B., Bolalek B. J., Bolalek J.
|
EN
Temporal variations in phosphorus species [total phosphorus (Ptot), organic phosphorus (Porg), total inorganic phosphorus (Pmin), phosphorus bound to calcium (PCa), aluminium (PAl) and iron (PFe)] were studied in the surface layer of bottom sediments from the Gulf of Gda?sk. These changes were caused mainly by variability in Porg, PAl and PFe concentrations and were closely related to the growth cycle in the basin. The phosphorus concentration was higher in the spring and summer (April - September) that in the autumn and winter (November-March). For much of the year concentrations of Pmin were higher than those of organic phosphorus. The prevalent form of inorganic phosphorus was PCa, whose concentrations exceeded those of iron- and aluminium-bound phosphorus.
3

Interdependence between phosphorus forms in sediments and iron in interstitial waters in the Gulf of Gdansk

88%
Matuszewska K., Bialkowska I., Bolalek J.
Oceanological and Hydrobiological Studies
|
2003
|
issue 1
5-14
EN
The content of various phosphorus forms in sediments and the content of iron in interstitial waters were measured in sediment samples collected in the Gulf of Gdansk in March 2001. The studies showed that the greatest amounts of the total phosphorus and total dissolved iron were present in the uppermost sediment layer, and their respective concentrations ranged from 203,99 mumol?g-1d.w. to 1894,02 mumol?g-1d.w., and from 0,02 mumol?dm-3 to 4,68 mumol?dm-3. The contents of these parameters were directly connected with the type of sediment - the greatest concentrations were measured in fine sediments. The analysis of multiple correlation coefficients demonstrated that in over 90% of cases the concentration of phosphorus bound with iron depended on: the sediment type and its humidity, the content of organic matter, and the concentration of the total iron dissolved in the interstitial waters.
4

Investigation of the causes underlying incisor overgrowth in the chinchilla using plasma concentrations of selected minerals

75%
Muszczynski Z., Sulik M., Ogonski T., Antoszek J.
Folia Biologica
|
2010
|
vol. 58
|
issue 1-2
107-111
EN
The aim of the study was to identify the causes underlying overgrowth of incisors in chinchillas through an analysis of selected plasma electrolyte concentrations, with particular consideration of minerals involved in the formation of osseous tissue, i.e. Ca,Mg, and P. The analysis involved 40 female standard chinchillasmanaged in a commercial farmsystem, aged 2 to 4 years, divided into two groups of 20 individuals each: D . chinchillas with incisor overgrowth and C . controls with normal dentition. Concentrations of Ca, Mg, and P were measured in blood plasma. The analysis was carried out using ICP OES (inductively coupled plasma optical emission spectrometry) by means of the Optima 2000 DV instrument (Perkin Elmer). The resulting data were analysed statistically using one-way ANOVA with Duncan.s range test. The results show that abnormal metabolism of dental tissue minerals, especially Ca and P, cannot be excluded as the cause of tooth overgrowth in chinchilla.
5

The potential impact of a sewage discharge through the ?Gdansk -Wschod? sewage-treatment plant collect-or on the chemical composition of the Gulf of Gdansk sediments

75%
Uscinowicz S., Zachowicz Z. J., Zachowicz J., Sokolowski S. K., Sokolowski K.
|
EN
The potential chemical impact of a treated sewage discharged from the ?Gdansk-Wschod? Sewage Treatment Plant to the Gulf of Gdansk was studied. A physical and chemical investigation of the sediments sampled in the area of the planned collector outlet as well as results of an earlier research were the basis for the present paper. A spatial distribution of majority of the studied sediment components shows a distinctive zoning that is clearly due to them being supplied by the Vistula River (Wisla River). This is particular for the mercury, lead, zinc and chromium as well as organic carbon and phosphorus. A distribution of the redox potential shows too a distinctive relation to the Vistula River mouth. Starting a sewage discharge through a new collector located between the two river mouths of the Wisla Smiala and the Wisla Przekop can move westwards the presently observed zoning of increased concentrations of some chemicals. However, most probably such changes will be small and they will not cumulate themselves over time.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.