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1

Stability studies of selected polycyclic aromatic hydrocarbons in different organic solvents and identification of their transformation products

100%
Dabrowska D., Kot-Wasik A., Namiesnik J.
Polish Journal of Environmental Studies
|
2008
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tom 17
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nr 1
17-24
One of the problems in an HPLC laboratory is the preservation of samples and extracts prior to analysis without any changes. It has been found that degradation processes cannot be eliminated entirely, but they can be slowed down considerably. Photodegradation kinetics of fluorene, anthracene and benzo(a)pyrene were studied in various organic solvents. Solvents known as good media to store PAHs for a long time were selected with respect to avoid degradation. In the case of fluorene, 9-fluorenone and 9-hydroxyfluorene were detected as main photoproducts. Formation of anthraquinone and 1,8-dihydroxyanthraquinone during the degradation of anthracene was observed. Benzo(a)pyrene-4,5-dihydrodiol and one of the isomers of hydroxy-BaP-dione as products of benzo(a)pyrene photodegradation have been identified.
2

Enzymatic activity of soil contaminated with triazine herbicides

100%
Bielinska E. J., Pranagal J.
Polish Journal of Environmental Studies
|
2007
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tom 16
|
nr 2
This paper, on the basis of a 5-year study (1996-2000), attempts to answer the following question: do the changes in enzymatic activity observed in an apple-tree orchard at a prolonged (20-year) application of triazine herbicides indicate the degradation processes in soil? In the soil of herbicide-triggered fallow land, the activity of the enzymes under scrutiny was subject to a significant inhibition. Among the enzymes analyzed, the activity of phosphatases was the most sensitive indicator for soil contamination with triazine herbicides. In the light of the obtained results, the criticism of the application of triazine herbicides in orchard-related cultivation is justified. It is recommended that they be replaced with other methods of weed control. However, that requires further research into the activity of enzymes for other types of soils used intensively for orchard-related purposes.
3

Environmental degradation of ramie fibre reinforced biocomposites

84%
Krasowska K., Brzeska J., Rutkowska M., Janik H., Sreekala M. S., Goda K., Sabu T.
Polish Journal of Environmental Studies
|
2010
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tom 19
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nr 5
The estimation of environmental degradability of different ramie fibre reinforced biocomposites in Baltic Sea water and in compost with activated sludge under natural conditions is the subject of this paper. The characteristic parameters of environments were monitored during incubation time and their influence on the rate of degradation of biocomposites was discussed. The degradation processes of two kinds of biocomposites, ramie fibre/Ecoflex® and ramie fibre/cellulose nanofibre reinforced corn starch resin, were studied by macro- and microscopic observations of polymer surfaces, changes of weight, and tensile strength during incubation under natural conditions. The macro and microscopic observations and weight changes confirmed the decrease of the tensile strength both of the composites after incubation in compost and in sea water. It was demonstrated that the biocomposites with natural fibre of ramie were degraded in compost faster than in sea water, due to different microbial communities. The ramie/Ecoflex® biocomposite was degraded more distinctly than ramie/cellulose nanofibre reinforced corn starch resin biocomposite in both natural environments.
4

Degradation of paper products from waste pulp type C with the addition of different colour pigments under the influence of UV radiation

84%
Modzelewska I., Patelski E., Jaszczur A.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2012
|
tom 79
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Model of CO emission level of exhaust gases in tractor engines fed with biofuels

84%
Wawrzosek J., Piekarski W.
International Agrophysics
|
2006
|
tom 20
|
nr 4
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Influence of environment, temperature and time of the thermal modification of ash wood (Fraxinus excelsior L.) on the cellulose weight average degree of polymerization

67%
Gawron J.
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
|
2021
|
tom 116
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Rheological properties of extrusion-cooked starch suspensions

67%
Mitrus M., Wojtowicz A., Oniszczuk T., Moscicki L.
Teka Komisji Motoryzacji i Energetyki Rolnictwa
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2012
|
tom 12
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nr 1
8

Adaptative stimulation of resistance to copper and zinc ions in mixotrophic iron - and sulphur - oxidizing bacteria

67%
Cwalina B., Dzierzewicz Z., Mikluszka K., Chodurek E.
Bulletin of the Polish Academy of Sciences. Biological Sciences
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1994
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tom 42
|
nr 2
9

Influence of cultivation and fertilization on the soil enzymatic activity and contents of active mineral nitrogen forms

67%
Domzal H., Bielinska E. J.
Polish Journal of Soil Science
|
1997
|
tom 30
|
nr 2
10

Conservation tillage works for vegetable growing

67%
Dumitru E., Enache R., Motelica D. M., Barbulescu L.
Bibliotheca Fragmenta Agronomica
|
1997
|
tom 2A
11

Methods for Pre-Carpathian soil agroecosystems stability increase

59%
Dziubajlo A., Senkiv V., Begey S.
Roczniki Gleboznawcze
|
2011
|
tom 62
|
nr 1
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