Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 31

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  kwas solny
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
10
51%
A review of development and nutritional regulation of stomach secretion in young pigs, based on recent literature, is presented. Hydrochloric acid and prochimosin are detected in the gastric mucosa of fetuses several days before the birth; their secretion into the stomach of newborn pig is small but increases with age and amount of feed intake. Since about 14 days of life chymosin secretion declines and is gradually replaced by increasing secretion of pepsin. Feeding piglets with dry feed stimulates hydrochloric acid and proteolytic enzyme secretion indicating effectiveness of supplementary feeding of pigs from 10-14 days of life with respective composition and high quality dry feed. The content and kind of protein, fibre, fat, physical form of feed and meal size may modify the amount and composition of stomach juice but the mechanism of their action is not, however, fully explained.
The studies were carried out on twenty newborn piglets. They were divided into four groups. The groups no 3 and no 4 were given intragastric 0.18% HCl from the 3th day of experiment. The groups no 2 and no 4 were infected on the 7th day with 10000 invasive eggs of Ascaris suum. The presence of A.suum larvae in the lungs and liver was examined after one week lasting invasion by BAERMANN rnethod. The total acidity in the gastric content was measured. The activity of alpha-amylase, lipase and proteases was determined in the extracts from pancreas and in the contents of stomach, duodenum and jejunum. The level of pepsinogens and alpha-amylase in the animals serum was studied. The intensity of Ascaris invasion was slightly higher in the group which was given HCl than in the infected group without HCl. The activity of digestive enzymes in the both groups was similar. Only in the stomach content from the 4th group the activity of pepsin was higher (p<0.05), and alpha-amylase and lipase were lower (p <0.01) than in the 2nd and in the 3th group. The level of pepsinogens was always lower and alpha-amylase higher in the serum of infected animals than in uninfected groups.
The study was carried out on 28 days old piglets divided into two groups of forty each. One group received fodder supplemented with exogenous 0.18% HCl and a control group was fed on unacidified fodder. The piglets were slaughtered at the age of 35, 42, 49 and 56 days. Distinct morphological lesions were found in the gastric mucosa and duodenum of piglets fed on acidified fodder and slaughtered at 49—56 days of age. Histopathological changes included the demaged duodenal villi with cellular infiltration and an increased amount of acid mucin. The gastrointestinal microflora showed a decrease in the number of E. coli and an increase of yeast; the number of Lactobacillus strains remained unchanged.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.