Autor: Lis, Marcin W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of 50 Hz magnetic field on chicken embryo development and course of hatching
Autorzy:: Lis, Marcin W.
Powiązania:: https://bibliotekanauki.pl/articles/93194.pdf
Data publikacji:: 2019
Wydawca:: Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:: chick embryo
extra low frequency magnetic field
hatch synchronization
embryo development
malformation
zarodek pisklęcia
pole magnetyczne o bardzo niskiej częstotliwości
synchronizacja kreskowania
rozwój zarodka
zniekształcenie
Opis:: The effect of additional extremely low frequency (ELF) magnetic field (50 Hz) on the development of chick embryo was investigated. The experiment was carried out in three variants for induction values 15, 10 or 5 μT. Magnetic field (MF) in the experimental incubator was generated by a set of three Helmholtz coils. The following analyses were performed: embryopathological analysis; evaluation of the hatched chicks for quality; analysis of the course and synchronization of hatching Early embryo mortality in groups exposed to MF 10 and 15 μT compared to the control was higher by about 3 percentage points. Simultaneously, in these groups the hatching processes accelerated, but the quality of hatched chicks was much lower.
Źródło:: Science, Technology and Innovation; 2019, 5, 2; 44-49
2544-9125
Pojawia się w:: Science, Technology and Innovation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Assessment of the antibacterial activity of chestnut (Castanea sativa) and cloves (Syzygium aromaticum) herbal extracts as an alternative to antibiotics use during post-hatching period of chicks
Autorzy:: Kędzia, Rafał
Lis, Marcin W.
Powiązania:: https://bibliotekanauki.pl/articles/1402368.pdf
Data publikacji:: 2020
Wydawca:: Państwowa Wyższa Szkoła Zawodowa w Tarnowie
Tematy:: antibiotic resistance
herbal extract
broiler chicken
mortality
odporność na antybiotyki
ekstrakty ziół
kurczęta brojlery
śmiertelność
Opis:: Bacterial infections of newly hatched chicks are the most common cause of their death in the initial period of rearing. These infections are always treated with antibiotics. The aim of the study was to investigate the antimicrobial activity of herbal extracts of chestnut (Castanea sativa) and clove (Syzygium aromaticum) against bacterial infections i.e. Escherichia coli, Enterococcus faecalis, Staphylococcus aureus, Klebsiella pneumonice in comparison to antibiotics. The results of the microbiological analyses showed that the Castanea sativa and Syzygium aromaticum extracts had a slighter antibacterial activity in comparison to antibiotics. The diameter of zone inhibition of the culture’s growth of gram-negative bacteria (i.e. Escherichia coli and Klebsiella pneumoniae) and gram-positive bacteria (i.e. Staphylococcus aureus and Enterococcus faecalis) was 6–13 mm for these extracts in comparison to 15–30 mm for antibiotics. However, some bacterial strains presented full resistance to the selected antibiotics, e.g., wild strains of Enterobacteriaceae to amoxicillin or Staphylococcus aureus and Enterococcus faecalis to florfenicol, colistin, and doxycycline. In the second experiment, the effect of the herbal extract mixture added into drinking water on the growth and mortality of chicken broiler during the first rearing week was investigated. There was found that the use of herbal extracts improved the chickens’ body weight (157.4 g; P ≤ 0.008) and decreased mortality rate (2.4%) compared to the control group (144.1 g and 3.9%, respectively) but not to the group treated with antibiotic (161.5 and 0.6% respectively; P ≤ 0.009). In summary, the use of herbal extracts as a nutritional supplement for poultry seems to have a positive effect on weight gain of young birds, and to some extent reduce mortality in the first week of rearing.
Źródło:: Science, Technology and Innovation; 2020, 11, 4; 48-54
2544-9125
Pojawia się w:: Science, Technology and Innovation
Dostawca treści:: Biblioteka Nauki

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