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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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The effect of CaCl2 foliar treatment (before harvest) on the accumulation of nitrates and nitrites in fresh and stored butterhead lettuce

100%
Olszowka K., Perucka I.
Acta Scientiarum Polonorum. Hortorum Cultus
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2011
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tom 10
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nr 4
The leaves of lettuce are very reach source of vitamins, macro and microelements and biologically active compounds. However, these plants contain also anti-nutritional compounds as nitrates and nitrites which levels depend on growth and storage conditions. The aim of this study was to determine the effect of foliar application of CaCl2 treatment before harvest on nitrate and nitrite accumulation, in whole leaves and leaf blades in fresh and stored lettuce. The experimental material was lettuce cv. Omega which was grown in greenhouse. The solution of CaCl2 was used in the concentration of 0.1M and 0.2M on plants, 20 and 10 days before harvest. After harvest, some plants were directly analysed, while the remaining plants were cold-stored at 4ºC for 7 and 14 days in dark polyethylene bags. The higher concentrations of nitrate and nitrite was noticed in fresh whole leaves than in leaf blades. The foliar CaCl2 treatment of plants before harvest contributed to a statistically decrease in the nitrate levels and nitrite increase in whole leaves in fresh plants. The greatest changes were noticed after using of 0.1M CaCl2 solution on plants. During the storage time of lettuce in the non-treatment plants were observed the higher concentration of nitrates and nitrites in leaf blades compared to fresh plants. The CaCl2 treatment on lettuce caused a significant decrease in the nitrite concentration of whole leaves of plants stored for 7 days, while in the leaf blades higher nitrite amounts were accumulated in lettuce which was stored in cold conditions during all experimental time.
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Accumulation of potassium, magnesium, calcium in fresh and cold stored leaves of lettuce (lactuca sativa l.) after cacl2 foliar treatment before harvest

100%
Perucka I., Olszowka K.
Journal of Elementology
|
2011
|
tom 16
|
nr 3
The aim of this study has been to determine the effect of foliar application of CaCl2 before harvest on the accumulation of K, Mg and Ca in fresh and stored lettuce heads. The experimental material comprised cv. Omega lettuce, which was grown in a greenhouse at the Department of Cultivation and Fertilization of Horticultural Plants of the University of Life Sciences in Lublin. CaCl2 solutions of the concentrations of 0.1 M and 0.2 M were sprayed over plants 20 and 10 days before harvest. After harvest, some plants were analysed immediately (fresh plants), while the remaining lettuce heads were cold-stored at 4oC for 7 and 14 days in dark polyethylene bags. The levels of dry matter, K, Mg and Ca were determined in whole leaves and leaf blades (without the midrib) of fresh and stored plants. The accumulation of dry matter, K, Mg and Ca varied depending on the leaf part, CaCl2 treatment and time of storage. The Ca content was lower leaf blades than in whole leaves of fresh plants not treated with CaCl2, but the K and Mg concentrations were on a similar level in both parts of leaves. The results of this study indicated that CaCl2 foliar spray of plants caused higher K and Mg concentrations in whole leaves compared to the control plants (no CaCl2 treatment) but decreasing Ca and K levels were observed in leaf blades without the midrib from fresh plants treated with 0.2 M CaCl2. During the 14-day cold storage of lettuce, the Ca and Mg levels in decreased whole leaves but increased in leaf blades of the control plants and after the 0.2 M CaCl2 treatment. Changes in the K, Mg and Ca accumulation affected the K:Mg and K:(Ca+Mg) ratios, which rose in whole leaves of stored plants compared to fresh ones.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of foliar calcium chloride treatment on the level of chlorogenic acid, beta-carotene, lutein and tocopherols in lettuce (Lactuca sativa L.)

100%
Perucka I., Olszowka K.
Acta Agrobotanica
|
2011
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tom 64
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nr 1
The aim of the presented study was to determine the effect of foliar application of CaCl2 on the level of β-carotene, lutein, tocopherols and phenolic compounds in the leaves of lettuce cv. Omega (Lactuca sativa L.). The experiments were conducted in the greenhouse of the Faculty of Cultivation and Fertilisation of Horticultural Plants, University of Life Sciences in Lublin. During the growing period, 7 and 14 days before harvest, the plants were treated with a solution of CaCl2 with concentrations of 0.1 M and 0.2 M. Plants sprayed with water were the control treatment in the experiment. Analyses were performed on whole leaves and the blade without midrib. The obtained results indicate that the leaves of lettuce cv. Omega are a good source of phenolic compounds, carotenoids and tocopherols. The dominant carotenoid in lettuce cv. Omega was β-carotene. Foliar application of CaCl2 on the plants did not have any significant effect on the level of β-carotene and lutein in the whole leaves. The contents of tocopherols, total phenolic compounds and chlorogenic acid were dependent on the concentration of CaCl2. The application of 0.1 M CaCl2 solution in the plants resulted in a decrease in the level of total phenolic compounds and chlorogenic acid, and an increase in tocopherol content. However, the treatment of the plants with 0.2M CaCl2 solution caused a lowering of the concentration of tocopherols and an increase in the content of chlorogenic acid and total phenolic compounds.
4

Preparative separation of phenolic compounds from Lactuca sativa L.

100%
Olszowka K., Perucka I.
Polish Journal of Food and Nutrition Sciences
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2011
|
tom 61
|
nr Suppl.1
5

Changes of the contents of selected phenolic compounds during storage of lettuce heads (Lactuca sativa L.) in cool conditions

100%
Olszowka K., Perucka I.
Polish Journal of Food and Nutrition Sciences
|
2011
|
tom 61
|
nr Suppl.1
6

Badanie monenzyny i salinomycyny w paszach - studium przypadków

81%
Olszowka K., Rubaj J., Korol W.
Pasze Przemysłowe
|
2015
|
tom 24
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nr 1
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wplyw CaCl2 na zawartosc skladnikow mineralnych w lisciach salaty

81%
Perucka I., Nurzynski J., Olszowka K.
Journal of Elementology
|
2007
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tom 12
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nr 3
181-190
Badano wpływ stosowania CaCl2 na gromadzenie się bioskładników mineralnych: magnezu, wapnia, potasu, miedzi, cynku, żelaza i manganu w świeżych liściach sałaty. Rośliny opryskiwano zróżnicowanymi ilościami roztworu CaCl2 oraz stosowano doglebowo różne dawki jonów potasowych w formie K2SO4. Sałatę zebrano po 30 dniach od wysiewu. Wpływ badanych czynników na poziom bioskładników w sałacie był różny. Po zastosowaniu podstawowej dawki K2SO4 stwierdzono wzrost zawartości jonów wapnia i cynku pod wpływem jednokrotnego oprysku CaCl2 oraz spadek zawartości jonów miedzi pod wpływem dwukrotnego oprysku CaCl2 w stosunku do kontroli. Potraktowanie roślin jonami wapniowymi miało większy wpływ na zmiany zawartości składników mineralnych po zastosowaniu podwójnej dawki jonów potasu. W tym przypadku zaobserwowano wzrost zawartości jonów żelaza i manganu pod wpływem jonów wapniowych (jednokrotny i dwukrotny oprysk CaCl2 w stosunku do kontroli. W przypadku podwójnej dawki jonów potasu stwierdzono również spadek zawartości jonów wapniowych na skutek dwukrotnego oprysku CaCl2 w stosunku do kontroli. Nie stwierdzono wpływu jonów wapnia i potasu na zawartość jonów magnezu w liściach sałaty.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Changes in the chlorophyll content in stored lettuce Lactuca sativa L. after pre-harvest foliar application of CaCl2

81%
Perucka I., Olszowka K., Chilczuk B.
Acta Agrobotanica
|
2013
|
tom 66
|
nr 4
The aim of the present investigations was to determine the cumulative effect of foliar treatment of lettuce plants with a CaCl2 solution and the cold-storage period on the level of chlorophylls in the leaves of lettuce cv. ?Omega? (Lactuca sativa L.). Plants were grown in a pot experiment conducted in the greenhouse of the Department of Cultivation and Fertilisation of Horticultural Plants, University of Life Sciences in Lublin. During the growing period, 10 and 20 days before harvest, the plants received foliar application of CaCl2 at the concentrations of 0.1 M and 0.2 M. Control plants were sprayed with water. Some plants were analysed immediately after the harvest; other specimens were cold-stored at a temperature of 4oC for 7 and 14 days. Whole leaves and blades without the midrib were analysed. The results obtained indicated that the foliar application of 0.2M CaCl2 in lettuce resulted in a decrease in the level of chlorophylls in fresh plants, compared with the control. A beneficial cumulative effect of the CaCl2 application and storage period on the chlorophyll level in lettuce leaves was observed in the leaf blades of plants after foliar treatment with the 0.1M CaCl2.solution and cold-stored for 7 and 14 days, in which increased levels of chlorophyll “a” and “b” and total chlorophyll, compared with the control, were found.
9

Porównanie różnych podejść do szacowania niepewności pomiaru witaminy C w paszach metodą HPLC

81%
Olszowka K., Rubaj J., Korol W.
Pasze Przemysłowe
|
2015
|
tom 24
|
nr 1
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