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Physico-chemical properties of fibrous pulp produced by neutral sulfite digesting of birch sawdust

100%

Joachimak K., Gagat M., Wojciak A.

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

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2014

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tom 85

2

Chemical composition of Trifolium repens L. from permanent grasslands in relation to some chemical soil properties

88%

Alberski J., Olszewska M.

Acta Agrophysica

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2015

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tom 22

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nr 4

The objective of this study was to determine the relationship between selected soil properties and the chemical composition of Trifolium repens in swards of permanent grasslands in the Olsztyn Lakeland. The study was carried out in 2005-2008 on permanent grasslands with a high share of legumes in the sward. A total of 26 meadow and pasture sites were investigated where the share of Trifolium repens in the sward ranged from 5% to 25% (2 points on the Braun-Blanquet cover scale). Phytosociological releves were done by the Braun-Blanquet method in selected grasslands in the most representative phytocenoses covering an estimated area of 25 m2. Soil samples were collected at a depth of 5-15 cm for analyses of the physical and chemical properties of soil. Samples of plant material of Trifolium repens were also collected from each treatment for chemical analyses. Analyses of soil composition and nutrient content in plant material were carried out with the standard methods. Bulk density, actual moisture content and water-holding capacity were determined by the oven-drying and gravimetric method, acidity was measured in KCl solution with the concentration of 1 mol dm–3, phosphorus and potassium content were determined by the Egner-Riehm method, magnesium content – by the Schachtschabel method, calcium and sodium content – by the universal method proposed by Nowosielski, and copper, zinc, manganese and iron content – by atomic absorption spectrometry (AAS). Plant material was analysed to determine the content of total nitrogen – by the Kjeldahl method, crude fibre – by the Henneberg- Stohman method, phosphorus – by the vanadium-molybdenum method, potassium, calcium and sodium – by flame photometry, magnesium and micronutrients by AAS. The highest number of communities with Trifolium repens were noted on light and medium textured soils with high and very high content of Mg, moderate abundance of Ca and micronutrients, moderate and low levels of P, low content of K and slightly acidic pH. Dry matter of Trifolium repens was characterised by high total protein content and optimal crude fibre content. A mineral composition analysis revealed optimal levels of phosphorus, magnesium and sodium, excessive content of potassium, calcium and manganese, and deficiency of copper, zinc and iron. A significant relationship between the chemical properties of soil and the content of total protein, crude fibre and mineral components in white clover dry matter was confirmed.

3

Green coffee extract as a substance improving properties of cosmetics creams

75%

Wasilewski T., Niziol-Lukaszewska Z., Szmuc E., Bujak T.

Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze

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2015

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nr 1

4

Analysis of the selected mechanical properties of the root parsley

75%

Gorzelany J., Matlok N., Kuzniar P., Zagula G.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2013

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tom 13

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nr 1

5

Modified tRNAs for probing tRNA binding sites on the ribosome

75%

Podkowinski J., Dymarek-Babs T., Gornicki P.

Acta Biochimica Polonica

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1989

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tom 36

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nr 3-4

6

Cationic derivatives benzo[1,2,3]thiadiazole-7-carbothioate (ASM) as inducers of plant resistance

75%

Kukawka R., Lewandowski P., Pospieszny H., Smiglak M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 3

7

The effect of waste waters of starch factories and breweries on chemical and biochemical properties of muck-peat soils

75%

Biernacka E., Liwski S., Maciak F.

Annals of Warsaw Agricultural University. Land Reclamation

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1987

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tom 23

8

Physical and chemical properties of pine wood chips produced from logging residues

75%

Jablonski K., Rozanski H.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2009

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tom 08

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nr 2

The paper presents research results into quantities of branches and tree tops forming logging residues as well as the calorific value, moisture and ash contents of chips burned in a fluidal boiler. The results showed that logging residues make up 17% of the above ground tree biomass, which gives about 52.8 t/ha. The calorific value of the wood chips was 7.8 MJ/kg for fresh material, 12.9 MJ/kg for chips after 4 month storage time and 16.2 MJ/kg after storing the chips for 8 months. The ash from chips burned in a boiler with a fluidised bed contained 62% of silicon dioxide, resulting from the filling role of sand in the fluidal bed. The share of CaO was 6%, MgO – 2.8% and N2O – 0.4%.

9

Cement type and properties of self-compacting concrete

75%

Grabiec A., Chutek R.

Acta Scientiarum Polonorum. Architectura

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2008

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tom 07

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nr 4

Self-compacting concrete (SCC) is undoubtedly a promising ecological cement matrix composite of new generation. However, it is not easy to achieve the required combination of properties in fresh SCC mixes. SCC is also particularly sensitive to any changes in the laboratory and at the job site. Choice of constituents for SCC, especially cement and superplasticiser which are able to collaborate in the correct way, has a significant effect on SCC performance. In this investigation considered in qualitative way, four cements, varying in physical and chemical properties and phase composition were used to check their compatibility with a new generation superplasticiser, taking into account the properties of fresh and hardened self-compacting concretes. Results revealed some differences although it is impossible to answer definitely which cement performs with the superplasticiser in the best way.

10

Content of colchicine in corms and edaphic conditions of Colchicum autumnale L. from Kaczawskie Mountains [Poland]

75%

Mroz L.

Polish Journal of Ecology

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2002

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tom 50

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nr 1

The chemical properties and colchicine content in Colchicum autumnale corms from sites localized in Kaczawskie Mountains (Poland) were studied. The colchicine in corms differs significantly and depends on chemical properties of the soils. This dependence is confirmed by the calculated significant correlations between colchicine content and soil pH, Ca, Mn and Fe content.

11

Effect of different methods of freezing on some chemical and physico-chemical properties of normal and enriched horsemeat during 3-month cold storage

75%

Kondratowicz J., Bak T.

Roczniki Instytutu Przemysłu Mięsnego i Tłuszczowego

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1998

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tom 35

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nr 1

12

The effect of long-term use of herbicides and sward and vorious NPK fertilization on some chemical properties of the soil in the orchard

75%

Lipecki J., Szwedo J.

Folia Horticulturae

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1995

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tom 07

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nr 2

13

Chemical properties of litter of forest and grassland ecosystems: transect studies in Siberia [Russia]

75%

Bienkowski P., Titlyanova A. A., Shibareva S. V.

Polish Journal of Ecology

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2006

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tom 54

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nr 1

The aim of this paper was to study comparatively the amount, chemical composition and energy content of litter from forest and grassland ecosystems along a transect in Central Siberia, running from the north (68°N, Forest tundra) to the south (50°N, Dry steppes); it is about 2 000 km. In the boreal forests litter standing crop ranges from 15 to 78 t·ha⁻¹ d.w., in subboreal birch stands – it is about 17 t·ha⁻¹ d.w. and in grasslands – the litter standing crop decreases southward along the transect from 6 to 1.5 t·ha⁻¹ d.w. All kinds of litter are rich in reduced compounds and have negative oxidation degree. Nevertheless oxidation degree increased from North to South in both ecosystem groups: from –0.6 to –0.3 in the boreal forests and from –0.5 to –0.2 in the subboreal ecosystems. The chemical composition of litter is specific and differs from both initial substrates, i.e. phytomass and products of humification. The litter contains as many carbon as fulvic acids, as many oxygen as humic acids and much more hydrogen than both acids together. Energy content values of litter were estimated to be lower than that of humic acids and higher than energy contents of fulvic acids. The transformation of litter organic substances seems to be shifted to the formation of fulvic acids. The content of minerals in litter changed in both series (forest and grassland) in the following order Si> Ca> F> Al> S> Mg> K> P> Na.

14

Chemical properties of the surface layer of forest soil studied in the Strzalowo Forest Inspectorate, Masurian Lakeland

75%

Czerwinski Z., Pracz J., Czerwinska K.

Polish Ecological Studies

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1995

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tom 21

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nr 2

15

Changes of topographic profile in dried valley bottom

75%

Grzywna A., Palys S.

Acta Agrophysica

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2000

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tom 35

In the present paper, on the basis of altitude measurements, changes of topographic profiles of a chosen dried valley in Elizowkaon the arable land were presented. Intensity of water erosion was also studied on the unprotected loess terrain for 40 years.On the average, 22 cm of mud deposited on the tested section of the valley bottom (total area of 1.28 ha) along 500 m of the water race line, with the average width of 25.ʹ6 m. In consequence, the local erosion basis was raised and the average inclination decreased slightly. Physico-chemical properties did not significantly change within 40 years and these factors are typical of deluvial soils with unshaped profile. Their partial improvement points to reduction and stabilisation of erosion processes. That phenomenon is associated with slight thaw water run-off and the lack of larger storm precipitation.

16

Microbial characteristics as a key indicators of sustainable soil use

75%

Vorisek K., Ruzek L., Novakova M., Popelarova E., Strnadova S., Barabasz W.

Acta Agraria et Silvestria. Series Agraria

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2003

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tom 40

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nr Sek.roln.

For sustainable soil use soil quality is essential presumption. Soil quality does not depend only on the physical and chemical properties of soil but it is very closely linked with the biological properties of soil mostly on microbiological processes. Soil quality is a dynamic feature, and any significant indicators must be sensitive to small changes in key soil properties. During the years 1991-2002 soil samples were collected at four Cambisol localities (totally 184 samples) and five Luvisol localities (totally 230 samples). Chemical (soil organic carbon [Corg], total nitrogen [Nt], pH KCl), textural (content of sand, silt, clay particles) and biological characteristics (microbial biomass carbon [Cmb], K2SO4 extractable microbial carbon [Cex]), respiration, ammonification, nitrification) were studied. The higher level of Corg (1.20-1.76%) characterised Cambisols and resulted in quite high microbial biomass carbon content (396—625 ug/g dry soil, average 556, SD 167). For these soils high control respiration (0.45-0.80 mg C02/h/100 g dry soil) and potential nitrification with (NH4)2S04 (6.7-18.4 mg N-NO3/8 days/100 g dry soil) were typical. Studied Luvisols reached lower levels: Corg (0.97-1.22%), Cmb (398-503 eg/g dry soil, average 455, SD 98), control respiration (0.46-0.57 mg C02/h/100 g dry soil), potential nitrification with (NH2)4SO4 (3.2-9.9 mg N-NO3/8 days/100 g dry soil). Mentioned lower level of organic carbon and medium level of microbial biomass raised in higher ratio Cmb/Corg (average 4.0%).

17

Effect of a pig farm on the physical and chemical properties of a river and groundwater

75%

Tymczyna L., Chmielowiec-Korzeniowska A., Saba L.

Polish Journal of Environmental Studies

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2000

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tom 09

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nr 2

Research has been conducted to evaluate the effect of a large pig farm on the physical and chemical properties of river and groundwater within the close farm vicinity. A river "R" flows in 0.5-1 km distance of a farm border. River water was sampled at three following points: at farm border, sewage intake at decanter of a closed down treatment plant and outside the farm border. The groundwater samples were collected out of the observational network installed to examine physical and chemical properties of groundwater, that is 6 piezometers and a dug well. To do that, some geological bore-holes were made down to 5 m depth. The piezometric examinations showed a significant concentration of nitrogen compounds, phosphates and chlorides in groundwater. Well water showed the contents of ammonium and nitrate nitrogen to exceed the boundary values for drinking water tenfold and figured out at 5.52 mg/dm3 and 100.72 mg/dm3, respectively. The river water examined demonstrated a substantial concentration of ammonium nitrogen (mean 3.25 mg/dm3), nitrite one (0.06 mg/dm3) as well as total suspension (38.39 mg/dm3). The parameters have greatly decreased the examined water purity grade and ranked it among purity grade III.

18

The encroachment of Scots pine Pinus sylvestris L. on the area of former sand exploitation in the Eastern Silesian Upland

75%

Czylok A., Rahmonov O.

Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu

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2004

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tom 69

19

Application of scanning electron microscopy and microanalysis [SEM] in the study of certain processes in Mollic Gleysols

75%

Drozd J., Licznar M., Licznar S.

International Agrophysics

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1994

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tom 08

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nr 1

20

Impact of soil cultivation systems on chemical soil properties

75%

Dzienia S., Puzynski S., Wereszczaka J.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2001

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tom 04

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nr 2

The research included a static crop-rotation field experiment set up in 1993: sugar beet winter wheat faba bean winter barley + stubble intercrop and covered the effect of three soil cultivation systems: A ploughing cultivation, B ploughless cultivation, C direct sowing on selected chemical properties of soil sampled from three soil profile layers: 0 10 cm, 10 20 cm and 20 30 cm. The ploughless soil cultivation and direct sowing increased the contents of organic C, total N and available K and decreased the content of exchangeable Mg in the upper soil layers. The content of available P and exchangeable Ca did not depend on the factors studied significantly. Giving up ploughing cultivation and taking up direct sowing increased the sum of exchangeable bases and the tendency to decrease soil pHKCl.

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