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1

On-line monitoring of A. niger metabolic activity in biotransformation of glucose to gluconic acid

100%
Podgorski W.
Biotechnologia
|
2004
|
issue 1
169-186
EN
Control parameters directly connected with metabolism of microorganism that reflect its actual activity in gluconic acid biosynthesis can be chosen basing on mass balance of the process. The relatively high correlation between parameters, normally determined via sample analysis and microorganisms? respiratory activity, enabled on-line estimation of biomass growth, product formation, and substrate uptake rate. The estimated parameters were continuously measured and employed to on-line control of gluconic acid overproduction by Aspergillus niger W78B strain. The application of the noninvasive technique for parameters determinations allowed obtaining high effectiveness of product formation characterized by the yield coefficient that equals 1.0 g g-1 and product formation rate amounted to 5 g dm-3 h-1. The estimation of the parameters cannot be used instead of their quantitative determinations, but it gives a possibility of on-line monitoring and control of the process.
2

Phytoplankton characterisitcs for different types of Estonian rivers

100%
Piirsoo K., Pall P., Viik M.
Oceanological and Hydrobiological Studies
|
2004
|
issue 1
23-35
EN
The following phytoplankton characteristics and parameters were studied for different ecological types of river reaches: biomass (PB, mg l-1); abundance (PA, 106 cells l-1); number of taxa per quantitative sample (PT); Nygaard's phytoplankton compound quotient (PCQ); phytoplankton dominants (PD). The quantitative characteristics of phytoplankton (species richness, abundance, biomass and PCQ) revealed an increasing trend from small to large upstream catchment areas, but did not respond to different river bedrock or flow velocity. Additionally, PCQ was the highest for the class of 'good' water quality. The phytoplankton dominants were not suitable for typology in the case of small streams where species composition was heterogeneous, without a well-developed phytoplankton community.
3

International and European standards for algal-based monitoring

100%
Kelly M.
Oceanological and Hydrobiological Studies
|
2004
|
issue 1
77-81
EN
International and European standards relevant to algal-based monitoring have been developed by the International Standards Organisation (ISO) and the Comite Europeen de Normalisation (CEN). This work has been given new impetus by the publication of the EU Water Framework Directive (2000/60/EC), which requires the use of CEN and ISO standards where available. Standards addressing diatom sampling and analysis, macrophyte survey, algal survey and phytoplankton analysis are all either published or under development by CEN. There is also a standard under development dealing with quality assurance of ecological assessments in the aquatic environment. Together, these standards should ensure that robust data are collected that can be used for intercalibrations between Member States.
4

On quality assurance procedures in monitoring analyses of nutrients

100%
Lysiak-Pastuszak E.
Oceanological Studies
|
1996
|
vol. 25
|
issue 3
3-13
EN
Environmental Committee of the Helsinki Commission recommended that all laboratories reporting data to the Baltic Monitoring Programme should establish the inhouse quality assurance systems to ensure the acquisition of reliable and relevant data. The paper presents some aspects of quality assurance system as operated in the Marine Laboratory of the Institute of Meteorology and Water Management. An attempt to produce laboratory reference material of natural seawater sample was made and here the results of analyses are presented. Routine control charts (x-charts) are discussed with specjal reference to scientific crew stability and performance during monitoring cruises. Participation in intercalibration exercises is mandatory for HELCOM laboratories. The results of the recent intercomparison exercise of nutrient analyses within QUASIMEME programme are presented in this paper, too.
5

Experience of using phytoperiphyton monitoring in urban watercourses

100%
Komulaynen S.
Oceanological and Hydrobiological Studies
|
2004
|
issue 1
65-75
EN
The purpose of this paper is to assess how informative phytoperiphyton structural parameters are, and to assess the feasibility of using them for biological monitoring of river quality. The spatial distribution of the attached algae community was studied in some of rivers in Republic of Karelia (NW Russia). The influence of anthropogenic impacts on periphyton communities was analysed in terms of species richness, species diversity, species ecology values, biomass and chlorophyll concentration. All rivers are subjected to different kind of anthropogenic impacts in addition to natural disturbance. With regards to the species composition the differences between the urban and natural stretches of rivers are obvious. The data obtained demonstrate that the phytoperiphyton communities in urban streams are dominated by broadvalent, pollution-tolerant and even saprophilic taxa. Substantial changes in periphyton structure were often caused by an enhanced mechanical impact by storm run-off, which retarded colonisation, rather than any chemical influence. The burial of algae by sand and silt resulted in the loss of species or entire algal assemblages were observed. As result the communities are dominated by a few species with high recolonization potential.
6

Use of algae for monitoring rivers in Poland - in the light of a new law for environmental protection

100%
Zelazowski E., Magiera M., Kawecka B., Kwandrans J., Kotowicz J.
Oceanological and Hydrobiological Studies
|
2004
|
issue 4
27-39
EN
An account is given of the status of monitoring in a new legal system for environmental protection in Poland. The legal acts such as Environmental Protection Law, Water Law and resulting from it the Ordinance of the Ministry of Environment, which relate to the EU Water Framework Directives (2000/60/EC) were introduced to the Polish legal system. They present the principles by which state monitoring of the environment should operate in Poland and thus the source of information about water quality. The present article deals with continuation of the biological studies for monitoring rivers, including the relevance of a computer programme for this purpose. The article concludes with and assessment of how the quality of Polish rivers will be improved as a result of this legislation.
7

Diatom indices and stream typology in Estonia

88%
Vilbaste S., Jarvekulg R., Pall P., Piirsoo K., Trei T., Viik M.
Oceanological and Hydrobiological Studies
|
2004
|
issue 1
3-10
EN
This paper deals with the use of diatom indices in the assessment of streams in Estonia. The problem addressed is how rational it is to determine different types of streams or stream reaches based on diatom research. At the moment, there are five different typologies of running waters in Estonia, two of which are analyzed here. Diatom indices can be employed to assess the ecological quality of water but not the status or type of stream. The most promising diatom indices for such assessment are the Trophic Diatom Index, Watanabe Index, Descy Index, and Schiefele & Schreiner Index.
8

Monitoring phytoplankton populations and water quality parameters in estuarine rivers of Chesapeake Bay, U.S.A.

88%
Marshall H. G., Burchard L.
Oceanological and Hydrobiological Studies
|
2004
|
issue 1
55-64
EN
A 16-year monitoring program (1986-2002) determined significant long-term trends among phytoplankton populations and water quality parameters in the tidal waters of several rivers (Rappahannock, James, York, Pamunkey) located in Virginia. There were increasing trends in total phytoplankton abundance and biomass, which included the increasing biomass of diatoms, cyanoprokaryotes, cryptomonads, and chlorophytes in each river. There were also trends of increasing downstream salinity, and decreasing concentrations of TN and DIN. The TP and DIP showed none, or variable trends, except in the York River where both concentrations were increasing. General observations also indicated the common occurrence of dinoflagellates and cyanoprokaryotes blooms in several of these rivers.
9

Proposals for the Baltic monitoring programme (HELCOM BMP) for the Polish marine areas of the Baltic Sea

88%
Andrulewicz E.
|
|
issue 1-2
159-177
10

The third periodic assesment of the Baltic Sea marine environment

87%
Trzosinska A.
|
|
issue 1-2
5-9
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