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The impact of biodegradable nonwoven fabric covers on the yield and quality of overwintering onions

100%
Siwek P., Libik A., Zawiska I.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2013
|
tom 12
|
nr 6
Field cultivation of vegetables in Poland is strictly related to weather conditions. Low temperatures occurring from November to March limit vegetable cultivation in the field. However protecting plants with row covers can prevent losses from untimely frosts and freezes and provide a means to modify the environment around the plant, favorably resulting in more rapid growth, earlier maturity, and possibly increased yields. Experiments were carried out in 2008–2010 at the experimental field of the Agricultural University of Kraków (N 50º4’, W 19º50’) in order to determine the impact of flat covers made from biodegradable nonwovens produced by the Institute of Biopolymers and Chemical Fibres and CENARO in Łódź. Seeds of frost-resistant ‘Glacier’ cultivar of onion were sown in the end of August, and after a significant drop in temperature occurred in the second half of November plants was covered with biodegradable nonwovens such as: Bionolle 59 g m⁻² and 100 g m⁻² and IBWCH 50 g m⁻² and 75 g m⁻², as well as standard nonwoven polypropylene PP 50 g m⁻². A plot that remained uncovered throughout the winter served as the control. The covers were kept until spring and were removed one (2009) and two months (2010) before harvest. During harvest, measurements of plant height and marketable yield were taken. In the laboratory harvested onions were estimated for ascorbic acid, dry matter, soluble sugar and nitrates content. The investigations showed that covering onion with biodegradable nonwoven material had a positive impact on yield in the first year of the experiment. There were no significant differences in the yield quantity in the second year. Contents of the analysed organic compounds showed no regular patterns in both years of the experiment. In 2009, the vitamin C, dry matter and nitrate contents were higher than in 2010. In the second year of the study, the control onions had the most soluble sugars.
2

Changes of specific mechanical energy during extrusion cooking of thermoplastic starch

100%
Mitrus M.
Teka Komisji Motoryzacji i Energetyki Rolnictwa
|
2005
|
tom 05
3

Modern trends in utilization of polysaccharide crops

100%
Tomasik P.
Acta Agraria et Silvestria. Series Agraria
|
2003
|
tom 40
|
nr Sek.roln.
Non-nutritional applications of polysaccharides are presented as a remedy for limits put on the level and quality of crop production. Present state of technique and prospects arc discussed based on the outlook of European Union, for the level of production of chemical industry up to 2040. The 300% increase in the output of that industry will be achieved without any increase in the utilization of fossils. Polysaccharides and proteins, versatile, renewable, biodegradable materials originating from crops will be primary sources of chemical industry.
4

Biopolymers based on renewable resources: environmental and economic aspects

100%
Murmura F., Taddeo R., Liberatore L.
Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze
|
2007
|
nr 2
5

The properties of materials made from the composite of potato starch and ethylene-co-acrylic acid with polyethylene

100%
Golachowski A., Leszczynski W., Michalski A., Naumowicz H.
Polish Journal of Food and Nutrition Sciences
|
2001
|
tom 10
|
nr 2
The properties of materials made from the composite of potato starch and ethylene-co-acrylic acid with polyethylene or glycerine added in different amounts were studied. As it has been found, the increasing proportion of easily degradable starch composite increased its solubility in water, methanol and chloroform. Besides, water absorption and resistance to break also increased, but elongation at break and flow coefficient were reduced. The decreasing proportion of polyethylene reduced suitability of the material for commercial use, but in the majority of samples, the reduction was not linear. When polyethylene addition was reduced to 40-50%, the properties of the material obtained were still acceptable.
6

Badania in vitro, w srodowisku zwacza, biodegradowalnego tworzywa opakowaniowego zawierajacego skrobie

80%
Zieba T., Zawadzki W., Wincewicz E., Leszczynski W.
Acta Scientiarum Polonorum. Medicina Veterinaria
|
2003
|
tom 02
|
nr 1
65-73
7

Wpływ warunków przechowywania na właściwości ekstrudowanych preparatów skrobi ziemniaczanej i kaolinu

80%
Tomaszewska-Ciosk E., Golachowski A., Drozdz W., Boruczkowska H., Zdybel E.
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
|
2012
|
nr 266
8

Catabolic activity of Bacillus and Desulfotomaculum bacteria in media containing rape-seed oil methyl esters [RMe]

80%
Waligorska M., Seifert K., Domka F., Korzeniowski A.
Polish Journal of Environmental Studies
|
2004
|
tom 13
|
nr 6
Catabolic activity of Bacillus licheniformis and Desulfotomaculum ruminis bacteria in media containing rape-seed oil methyl esters ( RMe) has been studied. The degree of the esters’ biodegradation was assessed on the basis of the kinetic parameters of the process of microbiological reduction of nitrates or sulphates, taking place with the involvement of RMe as electron donors. It has been shown that RMe in a wide range of concentrations are effective sources of carbon and energy for Bacillus licheniformis bacteria. At the esters concentration of 0.3% in the medium, the conversion of nitrates reached 100%, COD was reduced by 80% (biodegradation of RMe) and biomass increases three times. Desulfotomaculum ruminis bacteria in the media with RMe probably needs a long period of adaptation to this carbon source in the medium.
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