Judul: Keragaan genetik gen hormon pertumbuhan pada sapi pesisir Sumatera Barat
Abstrak: Sapi pesisir Sumatera Barat merupakan salah satu sumber daya genetik sapi lokal yang memiliki bentuk dan ukuran tubuh paling kecil dibandingkan sapi lainnya di Indonesia, seperti sapi aceh, sapi madura, sapi bali dan sapi peranakan ongole (PO). Keunikan sapi pesisir menjadi salah satu alasan dasar atas kajian molekuler terhadap gen hormon pertumbuhan (GH) yang diduga sebagai salah satu gen utama (major gene) yang berperan penting dalam proses pertumbuhan. Penelitian ini bertujuan untuk mengetahui keragaman, sekuens unik dan hubungan polimorfisme gen GH dengan bobot badan dan ukuran-ukuran tubuh baik pada sapi pesisir maupun pada sapi bali, sapi limousin dan sapi simmental sebagai pembanding.
Keyword: GH gene polymorphism, Bali cattle, Simmental cattles, Padang Pariaman, DNA isolation

Judul: Identifikasi Keragaman Genetik Gen Reseptor Hormon Pertumbuhan (GHR|AluI) pada Sapi Bali:
Abstrak: One of factor affects in growing is Growth Hormone Receptor (GHR). GHR is required for GH to carry out its effects on target tissues. The objective of the study was to estimate genetic diversity of the GHR|AluI in Bali, Limousin, Simmental and Pesisir cattle. Genotyping was performed on 248 animals, including 162 Bali, 21 Limousin, 17 Simmental and 48 Pesisir cattle breeds. Single Nucleotide Polymorphisms (SNP) has been found in exon 10, coding for the cytoplasmic domain of GHR, which was located at position 81 bp (A/G) induce amino acid substitutions Ser/Gly. Genotype frequencies of Bali cattle AA (0.988), GG (0.006) and AG (0.006) were evidenced for the GHR|AluI monomorphism, but largerly different from Limousin GG (0.667), AA (0.238) and AG (0.095), Simmental AG (0.529), GG (0.471) and AA (0.000), Pesisir AA (0.604), GG (0.375) and AG (0.021) were the evidenced of polymorphism. It was suggested that homozigosity (monomorphism) in Bali cattle could be affected by adaptability in extreme environmental conditions such as poor nutrition and improper manajement practice. It also could be affected by natural selection and phenotype plasticity phenomena.
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Judul: Sintesis Nanokomposit Kaolin/TiO2 Teremban Fe2O3 untuk Adsorpsi-Fotodegradasi Biru Metilena
Abstrak: Kaolin is a type of clay mineral that has adsorption capacity. The experiment shows that the adsorption capacity of kaolin was 20.6 mg/g. This value is lower than zeolite adsorption capacity that in general has value above 100 mg/g. Mixing kaolin with other materials to form nanocomposite, may improve its adsorption properties. Nanocomposites that had been synthesized were kaolin/TiO2 nanocomposites with the addition of Fe2O3 using 2 synthetic methods, namely using ball milling and paste methods. The nanocomposite synthesized using ball milling method had higher adsorption capacity value, i.e. 23.6 mg/g. The nanocomposite of kaolin/ TiO2 was able to adsorb and degrade waste dyes in ultraviolet range. Furthermore, addition of Fe2O3 to the kaolin/TiO2 nanocomposite improved the performance of the nanocomposite by reacting under the visible rays. Therefore, the performance of nanocomposite of kaolin/TiO2 added with Fe2O3 was is more effective since visible ray is the major part of the sun light.
Keyword: nanocomposite of kaolin/TiO2/Fe2O3., kaolin, photodegradation, adsorption