Wyniki wyszukiwania - AGRO

1

A survey on nitrogen and phosphor compound variation processes in wastewater stabilization ponds

100%

Pirsaheb M., Fazlzadehdavil M., Hazrati S., Sharafi K., Khodadadi T., Safari Y.

Polish Journal of Environmental Studies

|

2014

|

tom 23

|

nr 3

Being economical has increased utilization of stabilization ponds to remove different contaminants from wastewater in proper weather conditions. Our current study investigates variations of nitrogen and phosphorous compound concentrations in effluent of wastewater stabilization ponds. 60 samples were taken from raw wastewater, anaerobic pond (AP) effluent, primary and secondary facultative ponds (PFP and SFP), and effluent of final ponds in weekly intervals for 3 months. Samples were examined based on standard methods (20th edition) for the examination of water and wastewater. Nitrogen kjeldahl removal output due to the AP, PFP, SFP, and the whole system were 20.6±4.9, 6.6±3.4, 13.4±9.5, and 47.7±9.1%, respectively. Nitrite removal output due to the PFP, SFP, and the whole system were 30.1±8.8, 36.3±9.8, and 58.8±5.2%, respectively. Respective values for phosphor removal output in AP and SFP, and the whole system were 21.8±10.3%, 13.3±10.1%, and 20.9±17.1%. However, nitrite concentrations in all samples from AP effluent and phosphor levels in all samples from PFP effluent increased compared with those of influent. The results showed that AP plays an important role in removal of organic nitrogen and phosphorous compounds. While the whole system output in nitrogen compound removal was 58.8±5.2%, phosphor removal output showed low efficiency (20.9±17.1%). Increasing the number of complete ponds is suggested for increasing phosphor removal efficiency.

2

Changes in the quality of the water of Lake Wicko Male [Szczecin Lagoon] over the years 1991-1997

100%

Poleszczuk G., Sitek S.

Bulletin of the Sea Fisheries Institute

|

1997

|

nr 3

3

The algae of a reservoir of nitrogen wastewaters

86%

Rzeczycka M., Bonkowska E., Przytocka-Jusiak M.

Acta Hydrobiologica

|

1987

|

tom 29

|

nr 1

4

The runoff of nitrogen and phosphorus compounds from selected agricultural regions in the Vistula and Odra drainage basins

86%

Taylor R.

Oceanologia

|

1984

|

tom 18

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Bacterial cellulose synthesis by Kombucha microorganisms on a medium with a variable composition of nutrients

86%

Betlej I., Krajewski K.

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

|

2019

|

tom 108

6

The activity of selected lysosomal hydrolases in the mouse liver after paclitaxel and morphine administration

86%

Krol T., Wieczorek A., Lysek-Gladysinska M.

Cellular and Molecular Biology Letters

|

2002

|

tom 07

|

nr Suppl.

7

The assessment of influence of different nitrogen compounds and time on germination of Lupinus angustifolius seeds and chemical composition of final products

72%

Kasprowicz-Potocka M., Walachowska E., Zaworska A., Frankiewicz A.

Acta Societatis Botanicorum Poloniae

|

2013

|

tom 82

|

nr 3

The aim of the research was to determine changes in the chemical composition in lupin seeds during seed germination in a solution containing selected nitrogen compounds. Blue lupin seeds of the Neptun cultivar were germinated for 3 or 4 days in darkness, at 24°C in 1% solutions containing the following nitrogen compounds: urea, nitric acid, ammonium sulphate, methionine or yeast extract. The control consisted of seeds germinated in water. The presence of all nitrogen sources has resulted in a poorer growth of the sprouts as compared to seeds germinated in water. There was a significant increase in the true protein content as well as a significant decrease in the content of crude ash and alkaloids in the germinated seeds. The seeds germinated for 4 days had significantly higher total protein content and significantly lower content of nitrogen-free extract compounds and oligosaccharides as compared to the seeds germinated for 3 days. A significant influence of the nitrogen source on the concentration of some amino acids was found. Cystine was found to be absent in seeds germinated in the nitric acid solution, while there occurred a twofold increase in the cystine content and a fivefold increase in the methionine content in seeds germinated in the aqueous solution of methionine and an 50% increase in the cystine concentration was observed in seeds germinated in the yeast extract and ammonium sulphate solution. Methionine and cystine were the limiting amino acids in all the samples, accept of seeds germinated in the methionine solution were it was valine. Aqueous solutions of ammonium sulphate and yeast extract were found to have the most advantageous influence on the chemical composition of lupin germination products.

8

Dyrektywa Azotanowa w praktyce rolniczej

72%

Szutowska G.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

|

2004

|

nr 10

13-14

9

Dynamika zawartosci zwiazkow azotu w wodach jeziora Olecko Wielkie

72%

Wojtas A., Dabek M.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2006

|

tom 513

547-553

Badania przeprowadzone w latach 1990-2000 obejmowały wybrane cechy jakościowe wód kąpielisk (Zespołu Szkół Technicznych, Dzikiej Plaży, Szyjki, Skoczni) jeziora Olecko Wielkie. Średnie stężenie amoniaku i azotu azotynowego w badanych latach malało zarówno wiosną, jak i latem. Natomiast azotu azotanowego malało tylko wiosną, a w czasie lata miało tendencję wzrostową. W okresie wiosennym średnie zawartości amoniaku, azotu azotanowego i tlenu rozpuszczonego były w porównaniu do okresu letniego wyższe. Natomiast azot azotynowy występował w nieznacznie wyższych stężeniach latem. Współczynniki korelacji prostej między zawartością tlenu rozpuszczonego a zawartością azotu amonowego wahały się od 0,32 do -0,62, azotu azotanowego od 0,25 do -0,54, azotu azotynowego od -0,07 do -0,71.

10

Effect of Alar on nitrogen compounds content in apple trees

72%

Ciesielska-Piper J., Sadowski A.

Fruit Science Reports

|

1987

|

tom 14

|

nr 3

11

Effect of cultivar and harvest date of kale [Brassica oleracea L. var. acephala] on content of nitrogen compounds

72%

Korus A., Lisiewska Z.

Polish Journal of Environmental Studies

|

2009

|

tom 18

|

nr 2

235-241

The level of total nitrogen, protein nitrogen, nitrates (NO₃⁻) and nitrites (NO₂⁻) was measured in the leaves of kale of the cultivars Winterbor F₁, Redbor F₁ and Średnio Wysoki Zielony Kędzierzawy. The investigation was carried out in two successive years, the raw material being harvested three times each year, i.e. 10, 14 and 18 weeks after planting seedlings in the field. Depending on the year of the investigation, the cultivar and the date of harvest, the content found in 100 g fresh matter of kale was: 0.54-0.74 g total nitrogen and 0.46-0.50 g protein nitrogen; in 1000 g the content of nitrates (NO₃⁻) was 248-2810 mg and of nitrites (NO₂⁻) 0.14-0.95 mg. In both years the highest content of total nitrogen was found in leaves of Średnio Wysoki Zielony Kędzierzawy and of protein nitrogen in Winterbor F₁. The cultivar Redbor F₁ was characterized by the highest content of nitrates and nitrites. Comparing material from the three harvest dates, average values for the year and cultivar showed that the second harvest contained 9% more total nitrogen and 4% more protein nitrogen than the first, while the third harvest contained, respectively, 17% and 8% more than the first. Nitrate content fell by 67% and 83%, respectively, and nitrite increased by 5% (but later was reduced by 46%). Nitrate and nitrite are regulated in spinach and lettuce and for this reason understanding the accumulation of these compounds is critical if regulations are developed for kale.

12

The influence of the organic matter of sewage sediments on biological activity of microorganisms which carry out the transformations of carbon and nitrogen compounds

72%

Pisarek I., Grata K.

Polish Journal of Microbiology

|

2013

|

tom 62

|

nr 4

Soil microorganisms play an important role in the organic matter transformation process. The soil microorganisms also are in symbiotic relationship with plants. At the same time, soil microorganisms are sensitive to both anthropogenic and natural habitat changes. Particular characteristics of organic matter (the C:N relation, pH, the content the content of assimilated nutrients, the xenobiotics etc.) modify the biotic conditions of the soils. This particularly concerns the microorganisms which carry out the changes in the mineral and organic nitrogen compounds and the transformation of the external organic matter. The first aim of this work was to assess the influence of the sewage sediments and the manure on the phytosanitary potential of the soil environment. The second aim of this article was to estimate the number and activity of microorganisms which carry out the transformation of carbon and nitrogen compounds. This work showed the stimulating effect of the external organic matter both on the number and on the activity of most of the physiological groups. The manure mainly stimulated ammonificators, amylolitic microorganisms and Azotobacter sp. The sewage sediments mainly stimulated ammonificators, nitrifiers of I phase and cellulolytic microorganisms. The statistically significant impact of the physio-chemical soil habitat on the biological activity of the analyzed groups of microbes was also noted.

13

Influence of pollution sources of points and areals differentiation of the concentration of phosphorus and nitrogen compounds in water of Mały Jeziorak Lake

72%

Domska D., Wojtkowiak K.

Polish Journal of Natural Sciences

|

2010

|

tom 25

|

nr 3

There were showed influence of the points (local and city reception basin outflow) and the areas (recreation area and wasteland) differentiation of pollution sources on the concentration of nitrogen and phosphorus compounds in water of Mały Jeziorak Lake. There were analyzed NO₃⁻, NO₂⁻, NH₄⁺, total P and PO₄⁻³ content. Results of the studies were indicated that the most components concentration was low in I class of water cleanliness. There was more ammonium and nitrate nitrogen content near the recreation area and more nitrate nitrogen content in spring and summer time near the dairy outflow. Moreover, higher total phosphorus content but not more than in I class of water cleanliness norm were in the lake water with village rain outflow and near the recreation area and, phosphates content in II class water cleanliness in spring time near the recreation area.

14

Wpływ nawożenia fosforowego na plon i zawartość związków azotowych w burakach cukrowych w wysiewach polowych

72%

Siegenthaler A.

Gazeta Cukrownicza

|

1988

|

tom 96

|

nr 02

15

The influence of a long-term artificial aeration on the nitrogen compounds exchange between bottom sediments and water in Lake Dlugie

72%

Brzozowska R., Gawronska H.

Oceanological and Hydrobiological Studies

|

2009

|

tom 38

|

nr 1

113-119

16

The effect of microwave radiation on the changes of nitrogen compounds in a reactor with a biofilm

72%

Zielinski M., Krzemieniewski M.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

|

2007

|

tom 10

|

nr 2

17

Effect of different sucrose and nitrogen levels in the medium on chlorophyll and anthocyanin content in Clematis pitcheri shoots cultured in vitro at different temperatures

72%

Kawa-Miszczak L., Wegrzynowicz-Lesiak E., Gabryszewska E., Saniewski M.

Journal of Fruit and Ornamental Plant Research

|

2009

|

tom 17

|

nr 1

113-121

The aim of the work presented was to determine the chlorophyll and anthocyanin accumulation in Clematis pitcheri shoots cultured in vitro at different temperatures on the medium with various sucrose and nitrogen level. Two concentrations of sucrose: 10 g-l-1 and 30 gT1, and two levels of nitrogen compounds: 100% and 50% of standard MS strength, were used. Shoots were cultured at 15°C, 20°C and 25°C. It was found that plantlets of C. pitcheri grown at 20°C contained the highest and at 15°C the lowest content of chlorophyll. The sucrose concentration in the medium had no or only a slight effect. Lower level of nitrogen compounds (50% N) stimulated accumulation of chlorophyll in shoots as compared to a normal strength (100% N), with the highest differences at 15°C. High sucrose (30 g-l-1) and nitrogen (100% N) concentrations and low temperature (15°C) significantly promoted anthocyanins accumulation. Reduction of nitrogen compounds level in the medium to 50% and lowering sucrose concentration to 10 gT1 leads to decrease of anthocyanins accumulation in the shoots cultured at 15°C and 20°C. In the case of explants cultured at 25°C, the sucrose and nitrogen concentration in the medium had no or only a slight effect on accumulation of anthocyanins in the shoots.

18

Evaluation of natural minerals (zeolite and bentonite) for nitrogen compounds adsorption in different water temperatures suitable for aquaculture

72%

Sahin D., Oz M., Sertasi E., Oz U., Karsli Z., Aral O.

International Letters of Natural Sciences

|

2018

|

tom 71

In this study, it was aimed to determine the effects of zeolite and bentonite on the ammonium adsorption at different temperatures. In this research three trial groups with 3 repetitions were created for three different water temperatures (18±0.1°C, 24±0.0°C, 27±0.0°C). Experimental groups were prepared by adding NH4 + amount of 10.5 mg/l in 2 liters of water. After that, zeolite, zeolite+bentonite and bentonite were added into the bottles as 10 gram per liter. Water temperature, pH and TAN (Total Ammonium Nitrogen) values were determined during the trial period. At the end of trial TAN values at 27 °C were recorded as 10.103±0.11 mg/l, 9.227±0.13 mg/l and 7.933±0.17 mg/l in zeolite, zeolite+bentonite and bentonite groups, respectively. At the end of trial TAN values at 24 °C were recorded as 10.027±0.17 mg/l, 9.282±0.15 mg/l and 8.336±0.15 mg/l in zeolite, zeolite+bentonite and bentonite groups, respectively. At the end of trial TAN values at 18 °C were recorded as 9.012±0.28 mg/l, 7.702±0.14 mg/l and 6.594±0.14 mg/l in zeolite, zeolite+bentonite and bentonite groups, respectively. Maximum ammonium removal capacity, qe, was found to be 0.50 mg/g in the bentonite (18 °C). The TAN values determined at 18 °C were statistically more significant (p<0.05) than the TAN values obtained at 24 °C and 27 °C.

19

Effects of changes in photosynthetic irradiance of greenhouse tomatoes on nitrogen uptake, distribution, and nitrogen compound metabolism

72%

Paradowski M., Kaminska K., Gosiewski W.

Folia Horticulturae

|

1995

|

tom 07

|

nr 1

20

Transformation of nitrogen compounds in the muckous soils of a forest island

72%

Meysner T., Maryganova V., Szajdak L.

Acta Agrophysica

|

2006

|

tom 07

|

nr 2[133]

Ograniczanie wyników