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    Wyświetlanie 1-3 z 3
    Tytuł:
    Presence of CL influence the quantity and quality of COC in slaughter house derived ovaries of Boran heifers
    Autorzy:
    Ali, Sayid
    Degefa, Tamrat
    Lemma, Alemayehu
    Young, R. Curtis
    Powiązania:
    https://bibliotekanauki.pl/articles/1031270.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aspiration technique
    Boran heifer
    Bos indicus
    Slaughterhouse ovary
    ovarian type
    Opis:
    The objective of the study was to determine whether the presence of CL on the ovary can influence the number and quality of COCs recovered using needle aspiration technique. A total 40 numbers of Bovine ovaries were collected from the local abattoirs soon after the animals were slaughtered. The specimens were classified as corpus luteum present (CL+) and corpus luteum absent (CL) groups. A total of 583 follicles were aspirated from 40 ovaries and among them 381 (62.5%) COCs were collected from CL group ovaries and 202 (37.5%) COCs from CL+ group ovaries. The COCs were also classified as Grade I (>3 layers of cumulus), Grade II (2 or 3 layers of cumulus), Grade III (no cumulus) and Grade IV (degenerated cells). Grade I and Grade II were classified as normal, and Grade III and Grade IV were considered as abnormal COCs. The result indicated that greater numbers of follicles were aspirated and COCs were collected from CL ovaries (15.24±5.27 and 9.40±3.50, respectively) than ovary with CL+. Ovaries CL contribute higher normal COCs (Grades I and II) than that of ovaries with CL+. The result of this study is a preliminary work directing suitable source of COCs for initiating and optimizing in vitro embryo production experiment in like Ethiopia having huge cattle population and animal slaughtering is more common for various reasons like to export or for domestic consumption.
    Źródło:
    World News of Natural Sciences; 2021, 34; 29-37
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of breed, parity and frequency of collection on quality and quantity of OPU derived oocytes
    Autorzy:
    Ali, Sayid
    Lemma, Alemayehu
    Degefa, Tamrat
    Jemal, Jeilu
    Powiązania:
    https://bibliotekanauki.pl/articles/1031285.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Bos taurus
    Breed
    Crossbreeding Holstein-Friesian
    Ethiopian Boran
    OPU scheme
    Oocyte numbers
    Oocyte quality
    Ovum Pick
    Parity
    Opis:
    The aims of this study was to see the effect of breed, parity and scheme of collection on the quality and quantity of OPU derived oocytes and effect of transvaginal ultrasound guided follicular aspiration on subsequent fertility of donor cows. A total of 28 animals (11 Boran and 11 Boran Holstein-Friesian cross for once per week collection, and 7 Boran and 7 Boran Holstein-Friesian cross for twice per week collection) were used in this experiment. A total of 22 animals were evaluated for the effect of the OPU procedure on subsequent reproductive function. In 150 Ovum Pick up sessions, irrespective of collection scheme, breed and parity, 1124 follicle (554 in Boran and 570 in HF crosses) were punctured with a recovery rate of 51.1% in Boran and 48.6% in the crosses. Relatively more follicles were aspirated in crosses compared to Borans although the difference in oocyte recovery rate and quality were not statistically significant. Overall recovery rate was 57.7% in heifers and 42% in cows. Frequency of aspiration significantly influenced (P<0.05) oocyte recovery rate with more follicles aspirated in Once per week per session compared to twice per week per session but there was no difference in the mean number of recovered oocytes. A significantly higher number of follicles were aspirated (P<0.05) and good quality oocytes were greater in heifers than cows. Different COCs quality grades were recovered from breed, parity and frequency of collection category. Overall from a total of 574 collected COCs, about 326 (57%) of the recovered COCs were of the quality grades I and II, whereas 248 (43%) were with quality grades III and IV. All 22 animals showed estrus on average after 19 days of the last OPU procedure though a relatively weaker intensity of estrus signs, irregularity of the cycle and minor ovarian morphological change were noted. Response rate to a single PGF2α treatment on 18 animals was 72% (13/18). Subsequent insemination of those in estrus resulted in 53.8% (7/13) first service conception rate. In conclusion, parity, and to some extent frequency of collection had a significant effect on the quality and quantity of oocyte but not breed. Animals at post OPU were able to continue cycling and become pregnant.
    Źródło:
    World News of Natural Sciences; 2021, 34; 88-97
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Usefulness of some hyacinths cultivars for forcing in water
    Przydatność kilku odmian hiacynta do pędzenia w wodzie
    Autorzy:
    Krzymińska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11541675.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Hyacinthus orientalis
    forcing
    hyacinth
    ornamental plant
    plant cultivar
    usefulness
    water culture
    Carnegie cultivar
    City of Haarlem cultivar
    Delft's Blue cultivar
    Jan Bos cultivar
    Lady Derby cultivar
    Opis:
    An assessment was made of the usefulness for forcing of five cultivars of Hyacinthus orientalis L.: ‘Carnegie’, ‘City of Haarlem’, ‘Delft Blue’, ‘Jan Bos’, and ‘Lady Derby’. The bulbs were planted on 14 October 2003 and 2004 in Flexy-tray type of pallets filled with water and in plastic boxes with a standard medium. The bulbs were cooled for 12 or 14 weeks. It was found that forcing lasted shorter in the water-filled trays, while longer inflorescence stems were obtained in plants forced in the standard medium. The cooling of the bulbs for 14 weeks resulted in the shortening of the forcing time and in the lengthening of inflorescence stems.
    Oceniono przydatność do pędzenia pięciu odmian hiacynta wschodniego Hyacinthus orientalis L.: ‘Carnegie’, ‘City of Haarlem’, ‘Delft Blue’, ‘Jan Bos’ and ‘Lady Derby’. Cebule sadzono 14 października 2003 i 2004 r. do palet Flexy-tray wypełnionych wodą i plastikowych skrzynek z podłożem standardowym. Cebule chłodzono przez 12 lub 14 tygodni. Stwierdzono, że pędzenie trwało krócej w paletach wypełnionych wodą, dłuższe pędy kwiatostanowe uzyskano u roślin pędzonych w podłożu standardowym. Chłodzenie cebul przez 14 tygodni wpłynęło na skrócenie pędzenia i wydłużenie pędów kwiatostanowych.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2008, 07, 3; 87-92
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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