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: Ripitabilitas Sifat Kecepatan Lari dan Korelasi Fenotipiknya dengan Tinggi Badan pada Kuda Pacu Indonesia
Abstrak: Kuda Pacu Indonesia merupakan hasil grading-up kuda Sumba dengan kuda pacu Thoroughbred, membentuk ”bangsa baru” yang telah beradaptasi baik dengan lingkungan Indonesia sehingga dianggap sebagai kuda lokal. Kuda tersebut memiliki potensi untuk dikembangkan. Salah satu parameter genetik yang diperlukan untuk program seleksi sifat kecepatan lari adalah ripitabilitas. Penelitian ini diperlukan sebagai dasar pengembangan Kuda Pacu Indonesia (KPI). Perolehan informasi kecepatan lari sebagai data penelitian dilakukan dari koleksi data pada Buku Panduan Acara Kejurnas Pordasi tahun 1998–2008. Data yang diperoleh merupakan data performa fenotipik kuda pacu yang dilombakan. Data yang diolah merupakan kecepatan lari, yang diperoleh dari informasi waktu tempuh dan jarak lomba, dan tinggi badan. Setiap individu kuda yang diamati memiliki jumlah catatan yang tidak sama satu sama lain. Data dari individu-individu kuda yang diamati dikelompokkan berdasarkan jenis kelamin dan umur. Perhitungan ripitabilitas kecepatan lari dilakukan berdasarkan Becker (1968) dengan model statistik Yik = μ + αi +eik. Perhitungan nilai korelasi dilakukan dengan rumus korelasi regresi. Kecepatan lari KPI jantan dan betina pada umur dua tahun berbeda (P<0,05), berturut-turut sebesar 15,030±0,724 dan 15,203±0,634 m/detik. Kecepatan lari kuda pacu jantan dan betina tidak berbeda pada umur 3, 4, dan >4 tahun; berturut-turut sebesar 15,096±0,514; 15,244±0,704; dan 15,308±0,758 m/detik.
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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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