Autor: Nogalski, Z. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of fattening intensity on the fatty acid profile and mineral content of meat from Holstein-Friesian bulls
Autorzy:: Momot, M.
Nogalski, Z.
Sobczuk-Szul, M.
Pogorzelska-Przybyłek, P.
Powiązania:: https://bibliotekanauki.pl/articles/962857.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Diets high in saturated fatty acids (SFAs) and n-6 polyunsaturated fatty acids (PUFAs) at the expense of n-3 PUFAs have been shown to increase the risk of cardiovascular disease, obesity and cancer. Animal fat is considered to be the major source of unhealthy saturated fats. However, beef fat has a high nutritional value owing to the presence of minerals, PUFAs, vitamins and selected protein fractions. The aim of this study was to determine the effect of fattening intensity on the fatty acid profile and mineral content of meat from Holstein-Friesian bulls. Holstein-Friesian bulls aged 11 to 19 months were fattened under semi-intensive (SI, 10 animals) and intensive (I, 10 animals) systems. The bulls were fed maize silage, rapeseed meal and premix ad libitum. The diets for group I animals were supplemented with 2.5 kg ground triticale provided in an automatic feeding station. Meat samples were collected from m. longissimus dorsi (MLD). The samples were mineralized and assayed for mineral content. Fat was extracted from each sample, and the fatty acid profile of beef was determined by gas chromatography. Dietary supplementation with ground triticale increased the average daily gains of bulls and carcass dressing percentage, and contributed to higher carcass conformation and fat cover scores. Beef was found to be a rich source of valuable mineral compounds. The meat of group I animals was characterized by higher potassium levels and lower sodium levels, which points to its higher nutritional value. Semi-intensive (SI) fattening increased PUFA concentrations and decreased the n-6/n-3 PUFA ratio in beef.
Źródło:: Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Calcium and magnesium content in the milk of high-yielding cows
Autorzy:: Nogalska, A.
Momot, M.
Sobczuk-Szul, M.
Pogorzelska-Przybyłek, P.
Nogalski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/958245.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Cow’s milk has the highest share of total milk production and consumption in the world, including Poland. Milk is the most important source of readily available minerals, particularly calcium, in the human diet. The chemical composition of milk varies depending on genetic, environmental and physiological factors. Changes in the composition and physicochemical properties of milk affect its biological value and processing suitability. The objective of this study was to determine the effect of age of high-yielding Polish Holstein-Friesian (PHF) cows and lactation day on the calcium (Ca) and magnesium (Mg) content of milk. The average milk yield increased significantly during three consecutive lactations. The age of cows had a significant effect on the average Ca and Mg content of milk throughout lactation. Milk from younger cows had higher concentrations of the analyzed macronutrients. The concentrations of Ca and Mg in milk varied considerably depending on the stage of lactation. A substantial decrease in the milk Ca content was noted in the first stage of lactation. The calcium concentration in milk stabilized in the second month post partum, and it remained stable until the end of lactation. A decrease in the Mg content was noted until day 30 of lactation in milk from primiparous cows and cows in their second lactation. The oldest cows produced milk with the lowest Mg concentration, which resulted from a steady decrease in the milk Mg content until the fourth month of lactation. The Mg content of milk continued to increase from the fourth month until the end of lactation, regardless of a cow’s age. The Ca and Mg content of milk from the analyzed high-yielding cows was below the normal ranges (by approximately 24% and 6%, respectively). This is the reason why dairy products are often fortified with minerals.
Źródło:: Journal of Elementology; 2017, 22, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The effect of milk production performance of Polish Holstein-Friesian (PHF) cows on the mineral content of milk
Autorzy:: Nogalska, A.
Momot, M.
Sobczuk-Szul, M.
Pogorzelska-Przybylek, P.
Nogalski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/13827.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:: Journal of Elementology; 2018, 23, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Health-promoting properties of meat from once-calved and maiden heifers
Autorzy:: Momot, M.
Nogalski, Z.
Sobczuk-Szul, M.
Pogorzelska-Przybyłek, P.
Modzelewska-Kapituła, M.
Powiązania:: https://bibliotekanauki.pl/articles/962661.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Beef has a high nutritional value owing to the presence of minerals, vitamins, polyunsaturated fatty acids (PUFA) and selected protein fractions. The objective of this study was to investigate the influence of calving and nursing on the fatty acid profile and the content of minerals and vitamins in the meat of crossbred (Limousine x Polish Holstein-Friesian) once-calved heifers in comparison with the meat of maiden heifers. At 15 months of age, once-calved heifers were inseminated with the semen of Limousine bulls. After calving and lactation, they were slaughtered. Meat samples were collected from m. longissimus dorsi (MLD). The fatty acid composition was determined with the use of a gas chromatograph. The content of 5 minerals (potassium, sodium, magnesium, zinc, iron) was determined by atomic absorption spectrometry. The content of vitamins A and E was determined by high-performance liquid chromatography. Gestation and nursing had a negligent effect on the content of functional components in the meat of oncecalved heifers, in comparison with the meat of heifers. The meat of heifers contained more vaccenic acid (TVA) (C 18:1 T10+11), arachidonic acid (AA) (C 20:4) and docosahexaenoic acid (DHA) (C 22:6), whereas the meat of once-calved heifers was more abundant in oleic acid, zinc, iron and vitamin E (P ≤ 0.01). Commercially crossbred heifers can be included in once-bred heifer production systems, which create a possibility of producing additional offspring plus higher body weight of heifers with no adverse effect on the functional properties.
Źródło:: Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Assessment of the nutritional value of Sida hermaphrodita (L.) Rusby (Virginia fanpetals): chemical composition of herbage and silage
Autorzy:: Borsuk, M.
Purwin, C.
Baranowska, M.
Antoszkiewicz, Z.
Nogalski, Z.
Mazur-Kusnirek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1192717.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: Sida hermaphrodita
Virginia fanpetals
herbage
silage
chemical composition
nutritional value
polyphenols
amino acids composition
Opis:: Sida hermaphrodita as a crop plant could be used as raw material for the production of forage. The aim of this study was to evaluate the overall nutritional value of fresh and ensiled biomass of Sida hermaphrodita, harvested in the bud formation stage. The chemical and amino acid composition, fatty acid profile, concentrations of minerals and polyphenols of herbage and silage were determined. Additionally fermentation products were assessed in silage. Herbage contained crude protein (CP) of 182 g kg-1 dry matter (DM), neutral detergent fiber (NDF) of 375 g kg-1 DM and lignin content in NDF (L/NDF) was 8.88. Nitrogen fractions changed as a result of ensiling (P<0.010), non-protein nitrogen (NPN) from 274 g kg-1 total nitrogen (TN) in herbage to 683 g kg-1 TN in silage, and neutral detergent-insoluble nitrogen (NDIN) from 74.6 g kg-1 TN in herbage to 79.5 g kg-1 TN in silage. Silage was characterized by intensive lactic fermentation (114 g kg-1 DM) and pH of 4.30. It contained CP of 176 g kg-1 DM, NDF of 378 g kg-1 DM, and L/NDF (11.3) was higher than in the herbage. The CP of Sida hermaphrodita silage had a high content of essential amino acids (AAs) Lys, Thr, Val, Leu and Phe (3.98, 4.19, 4.55, 7.14 and 4.00 g 100 g-1 CP, respectively). Sida hermaphrodita silage was characterized by the highest K (6.262 g kg-1DM) content among macronutrients, and the highest content of Fe (40.88 mg kg-1 DM) and Mn (33.01 mg kg-1 DM) among micronutrients. Polyunsaturated fatty acids (PUFAs) predominated in the ether extract herbage and silage, and their proportion was three-fold and seven-fold higher than the proportion of monounsaturated fatty acids (MUFAs), respectively. Herbage had high quercetin content (652 µg g-1 DM), which decreased by 45% during the ensiling. Changes in the chemical composition suggest that this crop plant can be preserved by ensiling. The results of this study indicate that Sida hermaphrodita can be used for producing high-quality silage for ruminants.
Źródło:: Journal of Elementology; 2021, 26, 1; 249-260
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The effect of grass silage quality and supplementary concentrate levels on feed intake and fattening performance of crossbred steers
Autorzy:: Purwin, C.
Wyżlic, I.
Nogalski, Z.
Sobczuk-Szul, M.
Pogorzelska-Przybyłek, P.
Lipiński, K.
Wierzbowska, J.
Starczewski, M.
Michalski, J. P.
Powiązania:: https://bibliotekanauki.pl/articles/962834.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Grass silage is the basic component of diets for winter or year-round feeding of beef cattle in Central and Northern Europe, but its quality can vary considerably. The aim of this study was to determine whether the quality of silage influences the fattening performance of crossbred steers and whether higher intake of supplementary concentrate improves performance in steers fed silage of lower quality. The experiment was conducted on 52 crossbred steers with the initial body weight of 300 kg, produced by crossing Polish Holstein-Friesian dairy cows with Charolais, Limousin and Hereford bulls. The animals had ad libitum access to one of two types of grass silages (of higher and lower quality), and silage intake was recorded individually. Supplementary concentrate consisted of crimped triticale grain (785 g kg-1), rapeseed meal (190 g kg-1) and a mineral-vitamin premix for beef cattle (25 g kg-1). Concentrate was administered at two levels of 1.9 and 2.4 kg dry matter per day. The animals were housed in a free-stall system and feed intake was recorded individually. The fattening period lasted 65 days. Live weight gains were higher (P < 0.0001) in the group of steers fed high feed value grass silage than in the group administered low feed value grass silage. Steers fed silage supplemented with a higher level of concentrate were characterized by higher live weight gains (P < 0.0001) than those receiving silage with a lower level of concentrate. Average daily gains were similar in steers fed lower-quality silage with a higher level of concentrate and in those offered higher-quality silage with a lower level of concentrate (0.972 and 0.975 kg, respectively). It can be concluded that a comparable level of fattening performance can be achieved in steers fed low feed value silage supplemented with a higher amount of concentrate and in animals receiving high feed value silage supplemented with a lower amount of concentrate.
Źródło:: Journal of Elementology; 2016, 21, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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