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1

Accumulation dynamics of PCBs in selected organs and tissues of carp [Cyprinus carpio L.]

100%

Ciereszko W.

Acta Ichthyologica et Piscatoria

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2001

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tom 31

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nr 2

The study was aimed at the PCB (Clophen A50) accumulation dynamics in the gill filaments, muscle tissue, perintestinal adipose tissue, alimentary tract and the liver of cultured carp, Cyprinus carpio L. when taken, only, either from contaminated water or contaminated diet. The highest accumulation dynamics was observed in first 5-10 days of intoxication followed by a visible decrease resulted partly from increase in a growth rate of the tested organs and tissues as well as from the smaller daily intake per weight unit of the tested fish.

2

Optimisation of synthetic medium composition for levorin biosynthesis by Streptomyces levoris 99/23 and investigation of its accumulation dynamics using mathematical modelling methods

84%

Stanchev V. S., Kozhuharova L. Y., Zhekova B. Y., Gochev V. K.

Polish Journal of Microbiology

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2010

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tom 59

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nr 3

The composition of a synthetic culture medium for levorin biosynthesis by Streptomyces levoris 99/23 was optimised using mathematical modelling methods. The optimal concentrations of the medium components were established by means of an optimum composition design at three factor variation levels. An adequate regression model was obtained. Levorin biosynthesis by Streptomyces levoris 99/23 in the optimised synthetic medium was over 38% higher than in the initial medium. The antibiotic biosynthesis dynamics in the optimised culture medium was studied by means of a non-linear differential equation system. The resultant model was valid.

3

Differences in the accumulation and redistribution of dry matter and Nmin content in the cultivation of two different maize (Zea mays L.) cultivars for grain

67%

Szulc P.

Polish Journal of Environmental Studies

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2012

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tom 21

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nr 4

A field experiment was carried out in the Department of Agronomy of Poznań University of Life Sciences on the fields of the Research and Education Unit in Swadzim in 2009-10. Two different genotypes of maize cultivated for grain that exhibited different aging rates were compared: ES Palazzo and ES Paroli "stay-green"-type cultivar. The dynamics of dry matter accumulation were assessed 10 times every 14 days. We found that together with the progress of vegetation, the "stay-green" hybrid accumulated a significantly greater amount of dry matter in comparison with the traditional cultivar. During the generative development, the differences in production of dry matter of a single plant between the examined cultivar types were even significantly greater. The absolute growth rate (AGR) of dry matter of a single plant, leaf blades, and grain was higher for the "stay-green" hybrid when compared to the other examined cultivar. In order to assess the amount of soil mineral nitrogen remaining after plant harvesting in the autumn, the Nmin method was used in the present research. The soil mineral nitrogen content (N-NH₄+N-NO₃) after harvesting of ES Palazzo cultivar was significantly higher in comparison with the ES Paroli "stay-green" cultivar. A higher content of both mineral nitrogen forms after plant harvesting was observed in the 0-30 cm soil layer than in the 31-60 cm soil layer, irrespective of the type of maize hybrid. The content of nitrate nitrogen N-NO₃ in the total amount of Nmin in the 0-30 cm soil layer amounted to 79.6%, while at a depth of 31-60 cm it amounted to 81.2%. The examined cultivars affected the content of potassium and magnesium in soil after harvesting. However, no significant influence of maize hybrid type on the content of phosphorus and soil pH was found. A significantly lower amount of magnesium and potassium in soil after harvesting the "stay-green" cultivar when compared to the traditional cultivar proves that the main source of accumulation of these macroelements in the stage of generative growth are soil resources. This results from demand for these elements in the stage of maximum increase in biomass of generative yield. Such behavior of "stay-green"-type plants should imply a fertilization system with slow-acting fertilizers. Lack of magnesium and potassium in soil in the period of maturation of "stay-green"-type maize may be a classical example of the law of the minimum.

4

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Dynamika gromadzenia świeżej i suchej masy oraz azotu przez rośliny tradycyjnej i samokończącej odmiany łubinu żółtego (Lupinus luteus L.)

67%

Prusinski J.

Acta Scientiarum Polonorum. Agricultura

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2005

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tom 04

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nr 2

57-72

W latach 2002-2004 przeprowadzono ścisłe dwuczynnikowe doświadczenie polowe z dwiema odmianami łubinu żółtego, które zbierano sześciokrotnie w fazach: 8-10 liści, początku pąkowania i kwitnienia, płaskiego strąka oraz dojrzałości fizjologicznej i pełnej nasion w celu określenia dynamiki gromadzenia świeżej i suchej masy oraz azotu w wegetatywnych i generatywnych częściach roślin. Istotnie najwyższe plony zielonki obu badanych odmian uzyskano w fazie płaskiego strąka, a suchej masy – w fazie dojrzałości fizjologicznej nasion. Tradycyjna odmiana Polo charakteryzowała się istotnie wyższą maksymalną produkcyjnością od samokończącej odmiany Legat, która ze względu na szybsze tempo wzrostu od wschodów do początku pąkowania oraz większą dynamikę gromadzenia świeżej i suchej masy, a także N może być bardziej przydatna do użytkowania w międzyplonach ścierniskowych. Maksimum zawartości N w liściach stwierdzono od pąkowania do kwitnienia, a w łodygach na początku pąkowania. W plonie ogólnym suchej masy w dniu zbioru nasiona odmiany Polo stanowiły tylko 39%, a odmiany Legat 42% plonu całkowitej biomasy.

5

Effect of zinc foliar application at an early stage of maize growth on patterns of nutrients and dry matter accumulation by the canopy. Part I. Zinc uptake patterns and its redistribution among maize organs

67%

Grzebisz W., Wronska M., Diatta J. B., Dullin P.

Journal of Elementology

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2008

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tom 13

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nr 1

As reported in the paper by Grzebisz et al. (this issue), maize crop treated foliarly with fertilizer zinc at early stages of growth produced significantly high yields. Growth analysis procedures were applied to explain various effects of fertilizer zinc on grain yield increase and zinc accumulation and redistribution among maize organs in the course of the growing season. Therefore, based on the obtained zinc uptake characteristics, two major and one minor, but time-separated hot spots of zinc accumulation by maize plants have been distinguished. The first one, as described by RUR-Zn data, extended from the BBCH7 to BBCH9 stages. The second one, as expressed by CUR-Zn data, appeared during the milk stage of kernels growth and could be decisive for kernels sink capacity for accumulating carbohydrates. A minor hot spot, which occurred at tasselling may be responsible for pollen production and activity. The first zinc hot spot has also revealed the diagnostic problem of soil and plant tests for zinc. Current tests tend to overestimate plant zinc nutritional status, and therefore need to be urgently revised. Vegetative organs such as leaves and stems were only the minor sources of zinc for developing maize kernels. During grain filling period, most zinc absorbed by maize plants originated from soil resources.

6

Dynamika kumulacji zelaza w skorze, miesniach i watrobie krolikow

51%

Maciejewska-Paszek I., Grochowska-Niedworok E., Pawlowska-Goral K., Wardas M.

Bromatologia i Chemia Toksykologiczna

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2005

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tom 38

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nr Supl.

269-274

Podawanie królikom codziennie domięśniowo farmakologicznego preparatu żelaza w ilości 6 mg/kg m.c./dobę doprowadziło po 90 dniach do jego kumulacji w wątrobie, skórze i mięśniach. Stwierdzono, iż wątroba i skóra najintensywniej kumulują żelazo między 3 a 10 dniem, zaś mięśnie w pierwszych trzech dniach eksperymentu.

Ograniczanie wyników

1 Acta Ichthyologica et Piscatoria

1 Acta Scientiarum Polonorum. Agricultura

1 Bromatologia i Chemia Toksykologiczna

1 Journal of Elementology

1 Polish Journal of Environmental Studies

1 Polish Journal of Microbiology

1 Ciereszko W.

1 Diatta J. B.

1 Dullin P.

1 Gochev V. K.

1 Grochowska-Niedworok E.

1 Grzebisz W.

1 Kozhuharova L. Y.

1 Maciejewska-Paszek I.

1 Pawlowska-Goral K.

1 Prusinski J.

1 Stanchev V. S.

1 Szulc P.

1 Wardas M.

1 Wronska M.

1 Zhekova B. Y.

1 2012

1 2010

1 2008