Wyniki wyszukiwania

1

Marchew w zywieniu krow

100%

Minakowski D., Rydzik W., Florek S., Rusiecka I.

Biuletyn Informacyjny. Akademia Rolniczo-Techniczna w Olsztynie

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1993

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nr 37

59-68

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Alpha- and beta-carotene stability during storage of microspheres obtained from spray-dried microencapsulation technology

84%

Przybysz M. A., Szterk A., Symoniuk E., Gaszczyk M., Dluzewska E.

Polish Journal of Food and Nutrition Sciences

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2018

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tom 68

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nr 1

This study was aimed at comparing the stability of carotenes (α- and β-carotene) in oil solutions with their stability when spray-dried encapsulation is applied. The carotenes were isolated from carrot. A storage test was subsequently performed. The stability of carotenes in oil solutions was determined with the HPLC method. The color of the samples was also analyzed. The oil solutions of carotenes were microencapsulated with the spray-drying method. A mixture of gum Arabic and maltodextrin was used as a matrix. Degradation of carotenes during storage of the oil solutions followed first-order kinetics. The energies of activation were 58.7 and 33.6 kJ/mol for α- and β-carotene, respectively. Among the studied factors (time, daylight, temperature), it was the time and the temperature that infl uenced carotenes degradation the most. Spray-drying encapsulation caused a signifi cant decrease in the content of carotenes. However, retention of pigments stored in microspheres was longer than retention of pigments stored as oil solutions.

3

The effect of biochanin A on the chlorophylls and carotenoids content in the alga Chlorella vulgaris Beijerinck

84%

Czerpak R., Piotrowska A., Dobrzyn P., Tatur A., Marczuk M.

Acta Physiologiae Plantarum

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2003

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tom 25

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nr 3

4

Progesterone P-4 level in blood and the values of selected fertility indexes in cows fed various doses of carotenes

84%

Dembinski Z., Bronicki M.

Bulletin of the Veterinary Institute in Puławy

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1994

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tom 38

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nr 2

5

Porownanie technik chromatograficznego oczyszczania likopenu

67%

Karamac M., Jaros A. M., Amarowicz R.

Bromatologia i Chemia Toksykologiczna

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2004

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tom 37

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nr 3

261-267

Chromatografia kolumnowa na żelu krzemionkowym z eterem etylowym jako fazą ruchomą pozwala oczyszczać ekstrakt surowego likopenu w stopniu zbliżonym do metody ekstrakcji do fazy stałej (SPE). Ekstrakt oczyszczony tą metodą może być wykorzystywany do badan modelowych lub do dalszego oczyszczenia na semipreparatywnej kolumnie HPLC.

6

Wpływ wyczerpującego wysiłku fizycznego na zapasy akseroftolu w wątrobie

67%

Berger S., Dietl B.

Roczniki Państwowego Zakładu Higieny

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1956

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tom 07

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nr 5

7

Antioxidant parameters in Eimeria acervulina infected chicks after treatment with a new zinc compound

67%

Koinarski V., Gabrashanska M., Georgiva N., Petkov P.

Bulletin of the Veterinary Institute in Puławy

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2006

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tom 50

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nr 1

8

The stimulative effect of hydrocortisone on photosynthetic pigments in the green alga Chlorella vulgaris Beijerinck

67%

Czerpak R., Bajguz A., Kalinowska J.

International Journal of Ecohydrology and Hydrobiology

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2001

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tom 01

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nr 4

Studies carried out on the alga Chlorella vulgaris (Chlorophyceae) showed that hydrocortisone applied in a concentration range of 10-4 - 10-5 M has a stimulating effect on its growth, i.e. the content of fresh and dry mass, and on the chlorophyll and carotenoid contents. Hydrocortisone was found to have its greatest stimulative effect on the biochemical parameters analysed in a concentration of 5x10-5 M between the 15th and 20th day of the alga culture (with the exception of monoxy-xanthophylls). The strongest stimulation was noted in the content of: chlorophylls (a+b), from 184 % - 200 %, the total carotenoid pool, 170% - 190%, including carotenes stimulated from 193 % to 208 %, xanthophylls with 2 oxygen atoms in he molecule 171 % - 191 %, and richly oxidated xanthophylls 146 % -187 %. Maximum stimulation of the dry mass content was within the range of 138 % -151 % whereas the weakest stimulation was noted in the monoxy-xanthophylls 121 % - 125 % as compared with the control (100 %).The studies showed that hydrocortisone, as a typical representative of animal glucocorticoids, also occurring in some species of vascular plants and probably in thallophytes, when applied in the optimum concentration range 10-4 - 10-6 has a fairly intensive stimulative effect on the growth of C. vulgaris cells and their content of photosynthetic pigments, i.e. chlorophylls (a+b) and carotenoids especially carotenes and xanthophylls moderately rich in oxygen.

9

The effect of prolonged administration of nitrogen compounds [N-NO3] on the contents of methemoglobin, carotenes and retinol in the blood, beestings and liver of cows and their breed

67%

Dembinski Z.

Advances in Agricultural Sciences

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1993

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tom 02

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nr 1

10

The content of carotene and level of some other biochemical factors of the blood in cows in perinatal period, affected with prolonged acidosis

67%

Dembinski Z.

Advances in Agricultural Sciences

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1993

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tom 02

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nr 1

11

Vegetables and vitamins, plants and people

67%

Simon P. W.

Folia Horticulturae

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2003

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tom 15

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nr 2

12

The antioxidative barrier in the organism

59%

Kulikowska-Karpinska E., Moniuszko-Jakoniuk J.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr 1

Cell metabolism in organisms which use oxygen as a source of energy is closely associated with the generation and action of free oxygen radicals and their derivatives. Extra- and intracellular substances that are antioxidative in nature prevent overproduction of radicals and protect against propagation of peroxidative reactions. The list of compounds which can be treated as antioxidants becomes elongated. Many classifications of these compounds are used, of which the most common is the division according to their nature into enzymatic and non-enzymatic, according to their environment or the way they react with FOR. Enzymatic antioxidants include: superoxide dismutase, catalase, glutathione peroxidase and glutathione reductase. Non-enzymatic antioxidants are: vitamin E, vitamin C, glutathione, carotenes and retinols, and some transition metals (Zn, Cu and Se). The balance between the actions of these two groups of compounds determines normal functioning of the organism. Impairment of the balance between pro- and antioxidative processes in the organism is called anitoxidative stress and may be induced by intensified reactions involving FOR and by depressed activity/concentration of antioxidants. It seems, however, that irrespective of the cause, oxidative stress is likely to result in many diseases.

13

Wplyw kadmu, selenu oraz fenitrotionu na zawartosc witaminy A [retinolu] i karotenu w watrobie kurczat

51%

Zasadowski A., Przala F., Rotkiewicz T., Kupis-Froyn B., Wladyka I.

Acta Academiae Agriculturae ac Technicae Olstenensis. Veterinaria

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1997

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tom 25

3-13

W przeprowadzonym doświadczeniu badano wpływ czterotygodniowej intoksykacji kadmem (podawanym w wodzie do picia - 50 mg/dm3), jednorazowego podania fenitrotionu (50 mg/kg m.c.) oraz łącznej intoksykacji tymi związkami na zawartość witaminy A i karotenu w wątrobie kurcząt. Ponadto u zwierząt poddanych intoksykacji kadmem oceniano efekty jednoczesnego podawania selenu (1.40 mg/dm3). W doświadczeniu wykazano, że intoksykacja kadmem doprowadza do znacznego, utrzymującego się przez 21 dni po zaprzestaniu podawania kadmu, spadku zawartości witaminy A i karotenu w wątrobie kurcząt. Równoczesne stosowanie selenu wyraźnie zmniejszało efekty działania kadmu. Jednorazowe podanie fenitrotionu ptakom doprowadzało do znacznego, utrzymującego się przez 7 dni, wzrostu zawartości witaminy A w wątrobie. Fenitrotion podany kurczętom narażonym na działanie kadmu „maskował" toksyczne działanie kadmu - wyraźny spadek zawartości witaminy A i karotenu w wątrobie kurcząt tej grupy stwierdzono dopiero w 21. dniu po zaprzestaniu intoksykacji. Otrzymane wyniki wskazują na celowość podawania selenu zwierzętom narażonym na działanie kadmu oraz konieczność przeprowadzania dalszych badań nad problemami intoksykacji mieszanych z udziałem kadmu i fenitrotionu.

14

Karotenoidy - schwytane promienie sloneczne

51%

Mosiewicz R.

Przemysł Fermentacyjny i Owocowo-Warzywny

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2002

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tom 46

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nr 04

2-3

Ograniczanie wyników

Marchew w zywieniu krow

Alpha- and beta-carotene stability during storage of microspheres obtained from spray-dried microencapsulation technology

The effect of biochanin A on the chlorophylls and carotenoids content in the alga Chlorella vulgaris Beijerinck

Progesterone P-4 level in blood and the values of selected fertility indexes in cows fed various doses of carotenes

Porownanie technik chromatograficznego oczyszczania likopenu

Wpływ wyczerpującego wysiłku fizycznego na zapasy akseroftolu w wątrobie

Antioxidant parameters in Eimeria acervulina infected chicks after treatment with a new zinc compound

The stimulative effect of hydrocortisone on photosynthetic pigments in the green alga Chlorella vulgaris Beijerinck

The effect of prolonged administration of nitrogen compounds [N-NO3] on the contents of methemoglobin, carotenes and retinol in the blood, beestings and liver of cows and their breed

The content of carotene and level of some other biochemical factors of the blood in cows in perinatal period, affected with prolonged acidosis

Vegetables and vitamins, plants and people

The antioxidative barrier in the organism

Wplyw kadmu, selenu oraz fenitrotionu na zawartosc witaminy A [retinolu] i karotenu w watrobie kurczat

Karotenoidy - schwytane promienie sloneczne