Judul: Efisiensi Reproduksi Sapi Betina dan Performa Pedet di PT Lembu Jantan Perkasa
Abstrak: The research was conducted to study the reproductive efficiency of cows at the Lembu Jantan Perkasa breeding farm and to find out the relationship between breed used for artificial insemination (AI) with the calf birth and wean weight. Reproductive efficiency on the Days Open (DO), Service per Conception (S/C), Conception Rate (CR), Calving Interval (CI), calf birth weight, calf wean weight, calf sexes, and calf breed phenotype were observed. Sixty six cows, were used as a sample belong to replacement stock, obtained from imported cows from Australia (brahman cross) and inseminate with brahman, limousin or simmental semen frozen from Singosari artificial insemination centre. Result demonstrates a high CR (84%) with only 1.30 S/C. The CI was only 369.44±28.37 days and DO 80.84±13.86 days respectively. Birth weight of the calf which was inseminate with simmental demonstrated significantly higher (P<0.05) compare to brahman and they was no significantly different between limousin and brahman.
Keyword: calf wean weight, reproductive efficiency, calf birth weight, breed

Judul: Penampilan Produksi Induk Sapi Brahman Cross (BX) yang Diinseminasi Buatan Menggunakan Semen Berbeda di PT Lembu Jantan Perkasa Serang-Banten.
Abstrak: Penelitian ini bertujuan untuk mengetahui penampilan produksi dan reproduksi induk sapi Brahman Cross (BX) yang diinseminasi buatan dengan menggunakan semen sapi pejantan Brahman dan Simmental di PT LJP. Penelitian ini dilakukan pada bulan Juli sampai dengan bulan Agustus 2010. Peubah yang diamati dalam penelitian ini adalah calving interval (CI), service per conception (S/C), conception rate (CR), calving rate (C/R), bobot lahir, dan bobot sapih. Data calving interval (CI), service per conception (S/C), conception rate (CR), dan calving rate (C/R) yang diperoleh dianalisis menggunakan analisis deskriptif untuk menggambarkan kondisi PT LJP Serang-Banten. Data bobot lahir dan bobot sapih dianalisa dengan analysis of variance (ANOVA). Hasil penelitian menunjukkan bahwa induk sapi Brahman Cross yang diinseminasi buatan dengan semen sapi Brahman dan Simmental di PT LJP mempunyai produktivitas yang tinggi. Hal ini terlihat dari efisiensi reproduksi yang tinggi dari tahun ke tahun (2008, 2009, dan 2010). Angka service per conception untuk pejantan Brahman yaitu 1,8, 1,4 dan 1,3 dan pejantan Simmental yaitu 1,4, 1,5 dan 1,5. Sementara itu conception rate induk sapi BX yang diinseminasi dengan pejantan Brahman yaitu 46%, 69%, dan 71% dan pejantan Simmental 64%, 62%, dan 63%. Perbaikan calving interval dari 408 hari (tahun 2009) menjadi 372 hari (tahun 2010) dan calving rate (tahun 2009) dari 23% menjadi 84% (tahun 2010). Bangsa pejantan Simmental menyebabkan rataan bobot lahir pedet lebih tinggi dibandingkan rataan bobot lahir pedet yang disilangkan dengan pejantan Brahman. Penggunaan bangsa sapi pejantan yang berbeda tidak berpengaruh terhadap rataan bobot sapih pedet.
Keyword: Productivity, Brahman Cross, artificial insemination

Judul: Sintesis dan Pencirian Kompleks Fe(III)-Kuersetin
Abstrak: Quercetin belongs to flavonols which is able to chelate metal ions. Quercetin may chelate metal ions at 3’,4’-catechol, 3- or 5-hydroxycromone sites. In this study, quercetin was complexed with Fe(III). The complex with Fe(III) ions from FeCl3·6H2O was more stable than the complex derived from Fe(NO3)3·9H2O. The quercetin was yellow in color and showed maximum wavelengths (λ􀭫􀭟􀭶) at 250 and 370 nm. The Fe(III)-quercetin complex from Fe(NO3)3·9H2O was yellowish green with 􀟣􀭫􀭟􀭶 at 280 and 420 nm, whereas that from FeCl3·6H2O was dark green with 􀟣􀭫􀭟􀭶 at 280 and 430 nm. The 􀟣􀭫􀭟􀭶 shift indicated that the complex was formed at 3-hydroxychromone site. The Fe(III)- quercetin complex was formed with 1:1 metal-ligand mole ratio based on atomic absorption spectrophotometry analysis and the X-ray diffractogram showed that the crystallinity of the complex was 37%.
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