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: Inseminasi buatan (IB) merupakan salah satu teknik perkawinan yang dapat digunakan untuk memperbaiki mutu genetik ternak sapi potong melalui pejantan unggul dan pencegahan penularan penyakit kelamin yang dapat terjadi melalui kawin alam. Keberhasilan pelaksanaan IB ditentukan oleh tercapainya efisiensi reproduksi, peningkatan populasi sapi potong dan diterimanya IB oleh peternak. Efisiensi reproduksi dalam pelaksanaan IB dipengaruhi oleh peubah-peubah diantaranya jarak beranak (calving interval), jumlah pelayanan per kebuntingan (service per conception), angka kebuntingan (conception rate) dan angka kelahiran (calving rate). PT Lembu Jantan Perkasa (LJP) Serang-Banten merupakan salah satu perusahaan swasta yang bergerak dalam bidang penggemukan, pembibitan, dan pemasaran sapi potong. 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).
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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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