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The potential application of sheep wool as a component of composites

100%

Szatkowski P., Tadla A., Flis Z., Szatkowska M., Suchorowiec K., Molik E.

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

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2021

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tom 17

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nr 4

2

Degradation of the polymer prosthetic material in model body fluids

100%

Heimowska A., Brzeska J., Morawska M., Gorska M.

Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze

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2017

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nr 2

3

Influence of polymer and kaolin on drag reduction in pipe flows

88%

Sobota J., Boczarski S., Havlik V.

Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Melioracja

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1989

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nr 32

4

Evaluation of susceptibility of polymer and rubber materials intended into contact with drinking water on biofilm formation

75%

Szczotko M., Stankiewicz A., Jamsheer-Bratkowska M.

Roczniki Państwowego Zakładu Higieny

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2016

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tom 67

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nr 4

Background. Plumbing materials in water distribution networks and indoor installations are constantly evolving. The application of new, more economical solutions with plastic materials eliminates the corrosion problems, however, do not fully protect the consumer against secondary microbial contamination of water intended for human consumption caused by the presence of a biofilm on the inner surface of materials applied. National Institute of Public Health - National Institute of Hygiene conducts research aimed at a comprehensive assessment of this type of materials, resulting their further marketing authorization in Poland. Objectives. Evaluation and comparison of polymer and rubber materials intended to contact with water for the susceptibility to biofilm formation. Materials and Methods. Plastic materials (polyethylene, polypropylene, polyvinyl chloride) and rubber compounds (EPDM, NBR), from different manufacturers were evaluated. The study was carried out on 37 samples, which were divided into groups according to the material of which they were made. The testing was conducted according to the method based on conditions of dynamic flow of tap water. The level of bioluminescence in swabs taken from the surface of the tested materials was investigated with a luminometer. Results. Evaluation of plastic materials does not show major objections in terms of hygienic assessment. All materials met the evaluation criteria established for methodology used. In case of rubber compounds, a substantial part clearly exceeded the limit values, which resulted in their negative assessment and elimination of these materials from domestic market. Conclusions: High susceptibility to the formation of biofilm in the group of products made of rubber compounds has been demonstrated. Examined plastic materials, except for several cases, do not revealed susceptibility to biofilm formation, but application of plastics for distribution of water intended for human consumption does not fully protect water from secondary, microbiological contamination. Complete verification of plumbing materials including biofilm formation test before their introduction into the domestic market should be continued.

5

Research on properties of bitumen modified with polymers used for asphalt concrete pavement on bridges

75%

Onischenko A., Kuzminets M., Aksenov S.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2014

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tom 14

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nr 4

6

Polymer biodegradation and biodegradable polymers - a review

75%

Leja K., Lewandowicz G.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

255-266

Synthetic polymers are important in many branches of industry, for example in the packaging industry. However, they have an undesirable influence on the environment and cause problems with waste deposition and utilization. Thus, there is a tendency to substitute such polymers with polymers that undergo biodegradable processes. Increasing interest in applying polymers based on natural materials such as starch has been observed. This review describes biodegradation processes of xenobiotics such as aromatic compounds, plastics (PVA, polyesters, polyethylene, and nylon), and polymer blends (Starch/Polyethylene, Starch/Polyester, and Starch/PVA). Moreover, this review includes information about biodegradable polymers such as mixtures of synthetic polymers and substances that are easy digestible by microorganisms (chemically modified starch, starch-polymer composites, thermoplastic starch, and biodegradable packing materials), synthetic materials with groups susceptible to hydrolytic microbial attack (polycaprolactone), and biopolyesters (poly-β-hydroxyalkanoates). Production of this kind of material and introducing it to the market is important for the natural environmental. It may result in decreasing the volume of waste dumps.

7

Spectroscopic studies of naproxen and tryptophan immobilized in polyvinyl alcohol

75%

Sabara D.M. D. M., Dunne J.S. J. S., Pedro A.Q.H. A. Q. H., Trifunovic J. J., Balogun I.I.O. I. I. O., Kotlicic O. O., Serrano A. A., Kertesz I. I.

Biotechnology and Food Science

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2011

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tom 75

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nr 1

8

75%

Tyczkowski J., Krawczyk I., Wozniak B.

Acta Agrophysica

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2002

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tom 80

14

Studies on incorporating small fluorescent molecules into pamam dendrimers

75%

Klajnert B., Bryszewska M.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr 2

15

Removal of chromium by biosorption method (chitosan)

63%

Abatneh Y., Sahu O.

International Letters of Natural Sciences

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2014

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tom 03

Discharge of metal containing effluents into water has been a cause of major concern. Traditional treatment methods are proving to be ineffective and expensive. Chitosan was studied as a potential biosorbent due to its positive charge and relatively low cost. The study involves evaluating the metal binding performance of chitosan in a Polymer Enhanced Diafiltration (PEDF) system which uses an ultra filtration membrane to retain the chitosan which, in turn, binds the metal, thereby preventing passage into the permeate stream. Conditions for binding such as pH, concentration of polymer and chromium were studied. Optimal performance was obtained when the system was operated at pH values lower than the pKa of chitosan i.e. 6.3. Using 6 g/L chitosan at pH 4.0, chromium concentration was reduced to less than 1mg/L from a feed concentration of 20 mg/L. Equilibrium dialysis experiments were done to study the kinetics of binding and the uptake of metal per gram of polymer. Rheological measurements demonstrated that in the presence of 1-100 mM chromate, chitosan was found to be slightly shear thickening at low concentrations such as 4 g/L and 6 g/L whereas it was slightly shear thinning at higher concentrations like 12 g/L and 20 g/L This suggests that neutralization of chromium anions is due to the interaction of multiple chitosan molecules. This result is consistent with the relatively stiff nature of the polysaccharide. Overall, this study suggests that some modification of the native polymer would be required to improve uptake and make it an industrially workable process.

16

Problems of specified quality polymer mixture preparation when utilizing waste in coextrusion equipment

63%

Dyadychev V., Tereshchenko T., Dyadychev A.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2010

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tom 10A

17

Grafting of metallocene copolymer to higher polarity with acrylic acid

63%

Novak I., Pavlinec J., Chodak I., Kleinova A., Preto J., Vanko V.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2019

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tom 106

18

Peculiar features of radiation treatment of the packaging materials

63%

Gluszewski W., Ciesla K., Zimek Z., Kubera H.

Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze

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2014

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nr 4

19

Studies on the diversity of substrate composition in the culture medium of Kombucha microorganisms and its influence on the quality of synthesized cellulose

63%

Betlej I.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2019

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tom 108

20

A simplification of machinery seating on an example of marine diesel engines

63%

Piaseczny L.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2006

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tom 06

Ograniczanie wyników

The potential application of sheep wool as a component of composites

Degradation of the polymer prosthetic material in model body fluids

Influence of polymer and kaolin on drag reduction in pipe flows

Evaluation of susceptibility of polymer and rubber materials intended into contact with drinking water on biofilm formation