Judul: Ripitabilitas sifat kemampuan kuda pacu Indonesia mempertahankan kecepatan berlari
Abstrak: Indonesia racehorse is a domestic animal results of grading up between local mares with Thoroughbred stallion to get a better Indonesia racehorse. Selection of running performance racehorse in Indonesia needs to be done in order to get a racehorse that has good running ability. Performance of Indonesia Racehorse can be estimated by the running speed and ability to maintain these properties. The value of ability to maintain the running speed data used to estimate the ripitability value. The data of running speed at different distances (1200 m, 1400 m, and 1600 m) in each race which was obtained from racing record in PORDASI (Persatuan Olahraga Berkuda Seluruh Indonesia) competition for twelve years, were used to calculated the value of ability to maintain a running speed. Estimated ripitability value used to calculate the value of MPPA (Most Probable Producing Ability). Estimated ripitability of ability to maintain a running speed horse which ran at decreased speed and increased speed are 0,7714 ± 0,0988 and 0,3421 ± 0,2789, respectively. Indonesia Racehorse which has speed decreased could be recommended for sprint type horse while the increased speed horses could be recommended as long distance horse type.
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Judul: Reproductive Performance of Indonesian Racehorses.
Abstrak: Performa reproduksi kuda pacu Indonesia perlu diketahui untuk menentukan strategi efisiensi reproduksi. Penelitian ini bertujuan untuk mengetahui penampilan dan gangguan reproduksi kuda di Indonesia. Selama tahun 2010, tercatat sebanyak 310 ekor kuda pacu indonesia betina diperiksa di berbagai stable yang tersebar di Pulau Jawa dan Pulau Madura, Indonesia. Pemeriksaan kebuntingan dini dilakukan pada hari 18 dan 20 setelah kawin menggunakan ultrasonografi secara perektal. Tingkat keberhasilan kebuntingan mencapai 65,07% (190 ekor) dari satu atau lebih perkawinan (292 ekor). Gangguan kebuntingan yang tercatat adalah kebuntingan kembar sebanyak 6,32% (12 ekor), kematian embrio dini sebanyak 7,37% (14 ekor) dan, abortus sebanyak 1,29% dari 190 kebuntingan. Gangguan sistem reproduksi yang tercatat adalah pyometra sebanyak 1,29% (2 ekor), endometritis sebanyak 15,81% (42 ekor), dan hipofungsi ovari sebanyak 4,52% (13 ekor) dari seluruh kuda yang diperiksa
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Judul: Peran Surfaktan Setiltrimetilamonium Bromida dan Natrium Dodesil Sulfat pada Sintesis ZnO dengan Metode Hidrotermal
Abstrak: Zno crystal is the main preference material in various applications recently, such as in semiconductors, ultraviolet lasers, and catalysts. This study aims to synthesize ZnO with addition of surfactant. ZnO crystals were synthesized by reacting ZnSO4, KOH, and surfactants using hydrothermal method. The first step was to determine the best ratio of ZnSO4: KOH (1:2; 1:3; 1:4, and 1:5) based on X-ray diffraction. The second step was to evaluate the role of surfactan cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) on the synthesis of ZnO crystals. The result of this study showed the best ratio of ZnSO4:KOH was 1:3, based on the least of impurities and the highest degree of crystallinity (85.64%). The addition of surfactant CTAB and SDS in the synthesis of ZnO increased the degree of crystallinity, which were 98.28% and 92.17%, respectively. Based on mathematical calculation using Scherrer equation, the crystal size without surfactant was 32 nm, whereas with CTAB and SDS the crystallited size were 28 nm and 29 nm, respectively. The degree of crystallinity and crystal size indicated that CTAB surfactant produce ZnO crystals with the best characteristics as compared to SDS surfactant or without surfactant.
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