Judul: Ovarian Dynamics in the Thoroughbred-Indonesian Local Crossbred Mares
Abstrak: The development of horse breeding industry in Indonesia was commenced through horse racing events held all over the country. It were accelerated by the development of Thoroughbred-Indonesian local Crossbred horses. There are many broodmares injured during their racing time and retired from the racetracks. They may still has a reproductive vigor to continue on producing offsprings. Very little information has been reported on the monitoring the reproductive capacity of the mares. The objective of this study was to explore ultrasonography imaging of the ovarian dynamics, correlated with the estrus behavior of the Thoroughbred- Indonesian local crossbred mares. Three Thoroughbred-Indonesian local crossbred mares with 6.25-12.5% of local genetics aged 12-20 years old were used in this study. Estrus and ovulation synchronized by 10 mg PGF2α i.m. at luteal phase and 1500 IU hCG i.m. injection when the dominant follicle reach ≥30 mm in diameter. Ultrasonography examination was done every morning at approximately at the same time. Estrus behavior was observed by using teaser stallions following a standard method. Results of the experiment indicated that onset of the estrus was reached 1.33 ± 0.58 days after the hCG injection, with the average duration of 4.00 ± 1.00 days. The ovulations were done at 5.33 ± 1.15 days after PGF2α treatment and 66.67 ± 10.07 hours after hCG treatment. Maximum follicle diameter was identified to reach 4.50 ± 0.52 cm at one day before ovulation. The mares performed 25.4 ± 3.38 days length of estrous cycle with 2-3 follicular waves. It had been identified that the estrus duration was 6.8 ± 1.92 days in mares with the age of 12-20 years. The average of maximum diameter of the largest follicle before ovulation was 4.2 ± 1.24 cm. In conclusion, to improve the efficiency of breeding, several information are needed i.e. the optimal time of ovulation, relevan parameters related to follicular development.
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Judul: Ultrasound Image and Characteristics of Estrous after Ovulation Synchronization in the Crossbred Mares.
Abstrak: Penelitian ini bertujuan untuk mengeksplorasi gambaran ultrasonografi folikel dan korpus luteum, setelah sinkronisasi ovulasi pada induk kuda persilangan. Tiga induk kuda persilangan berusia 12-20 tahun digunakan dalam penelitian ini. Pemberian 10 mg PGF2α intra muskular digunakan untuk menginduksi estrus pada fase luteal dan 1500 IU hCG intra muskular digunakan untuk menginduksi ovulasi saat folikel dominan berdiameter ≥30 mm. Pemeriksaan ultrasonografi dilakukan setiap hari setelah pemberian PGF2α dan dilanjutkan setiap empat jam sekali setelah pemberian hCG sampai terjadi ovulasi. Hasil induksi estrus setelah pemberian PGF2α menunjukkan onset estrus 1,3±0,6 hari, durasi estrus 4,0±10 hari, dan interval ovulasi 3,2±1,0 hari, sedangkan ovulasi terjadi setelah pemberian hCG pada 62,7±10,1 jam. Folikel dan korpus luteum berdiameter 4,5±0,5 cm dan 0,8±03 cm satu hari sebelum ovulasi.
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Judul: Pengaruh Kadar Air Bahan Bakar hutan Terhadap Timbulnya Asap pada Proses Pembakaran (Skala Laboratorium)
Abstrak: Salah satu dampak negatif dari kebakaran hutan adalah asap, yang dapat nienyebabkan terjadinya polusi udara karena mengandung S02, NOx, 0 3 , H2S, CO, dan partikel karbon sangat berbahaya bagi kesehatan makhluk hidup. Selain secara langsung berdampak negatif pada manusia dan hewan, akibat lain yang ditimbulkan dari asap hasil kebakaran hutan adalah terganggunya kelancaran transportasi baik darat, laut dan udara. Kabut/gumpalan asap tersebut dapat mengganggu lalulintas darat terutama pada sorelmalam hari dan pagi hari karena mengganggu jarak pandang pengemudi kendaraan.
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