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1

Pre-incubation and turning during long storage as a method of improving hatchability and chick quality of Japanese quail eggs

100%
Damaziak K., Pyzel B., Zdanowska-Sasiadek Z.
Annals of Animal Science
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2021
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tom 21
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nr 1
2

Czynniki warunkujące wydajność, skład chemiczny, wartość odżywczą i przydatność technologiczną mleka kóz

100%
Krzyzewski J., Pyzel B., Bagnicka E.
Wiadomości Zootechniczne
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2014
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tom 52
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nr 4
3

Chemical composition, physical traits and fatty acid profile of goat milk as related to the stage of lactation

76%
Strzalkowska N., Jozwik A., Bagnicka E., Krzyzewski J., Horbanczuk K., Pyzel B., Horbanczuk J. O.
Animal Science Papers and Reports
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2009
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tom 27
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nr 4
The chemical composition and physical traits (selected) of milk, and fatty acid profile of milk fat were determined throughout the progress of lactation II in 20 Polish White Improved goats. From October to May goats were fed corn silage, hay and carrot ad lib., concentrate according to their milk yield, with mineral and vitamin premix, chalk and NaCl. From June to September hay was substituted by fresh grass. The diets were balanced according to INRA feeding standards. Milk samples were taken from each goat on lactation day 60, 120 and 200 (lactation stage 1, 2 and 3, respectively). With the progress of lactation highly favourable changes took place in the most desirable monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acids content of a total of fatty acids. The coefficients of the calculated Pearson’s correlation showed that the concentration of MUFA and PUFA (including conjugated linoleic acid – CLA) which are most desirable from the nutritive point of view, is negatively correlated with the daily milk yield.
4

Profil kwasów tłuszczowych, koncentracja cholesterolu i podatność na lipolizę frakcji tłuszczowej mleka koziego

76%
Strzalkowska N., Jozwik A., Bagnicka E., Polawska E., Krzyzewski J., Pyzel B., Horbanczuk J. O.
Medycyna Weterynaryjna
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2012
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tom 68
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nr 01
World production of goat milk has increased In the last 20 years, especially in developed countries. Goat milk is differentiated from cow milk in many parameters, among others in size of fat globules and fatty acid profiles. Milk fat is one of the main milk components and decides about its nutritive, energetic and technological values. The components of goat milk fat are triglicerides (ca. 95%), diglicerides (2%), monoglicerides (0.08%), phospholipids (1%), free fatty acids (0.28%), total cholesterol (0.5%) and fat soluble vitamins (A, D, E, K). The fatty acid profile of goat milk differs from those of cow milk mainly because goat milk contains twice as much of short chain fatty acid (C6:0; C8:0; C10:0) as does milk from cows. Those fatty acids decide about its sensory and organoleptic and health-promoting parameters. The content of cholesterol in goat milk depends of many factors, primarily the feeding system and secondary stage of lactation. It can reach values between 2 and 24 mg/100ml of milk. Cholesterol is mainly connected to fat globules. The lipolitic phenomenon, which occurs in the fat fraction, is connected with an increase of the free fatty acid concentration and other substances that have an undesirable influence on milk quality and its products.
5

Association between the polymorphism of bovine beta4-defensin gene and milk traits in Holstein-Friesian cows as computed for standard [305 days] and the whole lactation

76%
Krzyzewski J., Bagnicka E., Strzalkowska N., Jozwik A., Pyzel B., Zwierzchowski L.
Animal Science Papers and Reports
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2008
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tom 26
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nr 3
Associations were studied between the polymorphic forms of bovine β4-defensin gene and milk traits in cows during the standard (305 days) and the whole lactation. The study was carried out In the years 2004-2007 on 207 Holstein-Friesian cows yielding on the average 9600 kg milk/year. The animals were in their first to fifth lactation, maintained in loose barn and fed ad libitum with TMR (total mixed ration) composed of maize silage, wilted grass silage and concentrates supplemented with minerals and vitamins. The diets were formulated according to the INRA standards. Milk production data were collected from the individual cows’ records during their consecutive lactations.The RFLP-NlaIII method was used to identify the polymorphic forms of β4-defensin gene (C and T).A total of 616 records of standard and 837 of the whole lactation for milk, milk fat and milk protein yield and fat and protein content of milk were statistically evaluated using one-trait repeatability animal model with DMU package.The cows of CC genotype yielded more milk than cows of genotype CT during both the standard (+181 kg, P≤0.05) and the whole lactation (+241 kg, P≤0.05). The CT cows produced milk with higher protein content (P≤0.01 and P≤0.05 for standard and whole lactation, respectively), but the protein yield did not differ significantly between the two genotypes in question. Moreover, no significant differences were identified in fat content of milk between the CC and CT genotype, but the fat field was higher (P≤0.05) in homozygous CC cows.
6

The oxidative status of milking goats after per os administration of N-acetylcysteine

64%
Jozwik A., Bagnicka E., Strzalkowska N., Sliwa-Jozwik A., Horbanczuk K., Cooper R. G., Pyzel B., Krzyzewski J., Swiergiel A. H., Horbanczuk J. O.
Animal Science Papers and Reports
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2010
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tom 28
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nr 2
Investigated were changes in selected redox parameters – vitamin C, malondialdehyde (MDA) and glutathione (GSH) content of goat blood plasma – as markers of oxidative stress after per os administration the N-acetylcysteine (NAC). Used were 20 Polish White Improved goats, selected from the flock of 60 animals. Within the selected goats distinguished were four groups according to somatic cell counts (SCC) of milk: group I – below 1×106, group II – 1×106-2×106, group III – 2×106-4×106 and group IV – above 4×106/ml. Concentrations of GSH, MDA and vitamin C of blond plasma were assessed just at start of the experiment and then after 7 days of daily administration of 12 mg NAC per kg body weight to goats. After 7 days of administering NAC to goats the plasma concentration of both MDA and GSH dropped and that of vitamin C increased. It is concluded that NAC administered per os increases the anti-oxidant capacity and may reduce the content of lipid peroxidation products in blood plasma of milking goats.
7

A relationship between somatic cell count, polymorphic form of beta4-defensin and susceptibility of cow milk fat to lipolysis

64%
Strzalkowska N., Jozwik A., Polawska E., Zdanowska-Sasiadek Z., Bagnicka E., Pyzel B., Lipinska P., Horbanczuk J. O.
Animal Science Papers and Reports
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2014
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tom 32
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nr 4
The aim of this study was to evaluate the effects of somatic cell count and the polymorphic form of β4-defensin on the concentration of free fatty acids (FFA) and physico-chemical characteristics of cow’s milk. The study was carried out on 120 Polish Holstein-Friesian Black and White dairy cows.The animals were maintained in a loose barn and fed with the TMR system according to the INRA norm. The animals were divided into groups according to their polymorphic form of the defensin β4 gene: 1st – CT (def-1); 2nd – CC (def-2) and into two groups in terms of their somatic cell count:1st - <3×105 (SCC-1) and 2nd – 3×105 – 6×105 (SCC-2) cell/ml. Milk samples were collected once a month during the whole lactation. Chemical composition and some physico-chemical parameters of milk were determined by automated infrared analysis with a Milkoscan FT2 instrument. SCC were evaluated using BactoCaunt IBCm. A relationship was found between polymorphic forms of the defensin gene and the level of FFA in milk directly after milking (CT
8

The effect of feeding linseed cake on milk yield and milk fatty acid profile in goats

52%
Jozwik A., Strzalkowska N., Bagnicka E., Lagodzinski Z., Pyzel B., Chylinski W., Czajkowska A., Grzybek W., Sloniewska D., Krzyzewski J., Horbanczuk J. O.
Animal Science Papers and Reports
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2010
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tom 28
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nr 3
The study aimed at determining the effect of supplementation the diet with linseed on milk yield and milk fatty acids profile in the middle stage of lactation of goats. Used were 16 Polish Fawn Improved goats divided into two groups: (1) fed the standard diet without supplementation (control) and (2) fed the diet supplemented with linseed cake (19.9% of diets’ total dry matter). Both diets were balanced according to INRA feeding standards and offered from week 12 to 17 of goats’ lactation. Milk samples were taken twice: two weeks after the beginning and then at the end of supplementing the diet with linseed cake. The linseed cake led to increase in milk yield and to favourable changes in fatty acids profile (the share of MUFA increased and of SFA decreased). Moreover, CLA kontent of milk significantly increased (ca. 10-fold) after linseed cake supplementation, whereas the concentration of undesirable SFA (especially C12 to C16) dropped significantly (almost 2-fold).
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