Judul: Persilangan antarras Ulat Sutera (Boinbyx ntori L.)
Abstrak: Penelitian ini dilakukan di Puslitbang Hutan dan Konservasi Alam - Disiplin Persuteraan Alam, Bogor, mulai bulan Maret sampai dengan April 2001. Tujuan penelitian ini adalah untuk menduga hasil persilangan antarras ulat sutera (Bombyx mori L.) dengan menggunakan program simulasi komputer.
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Judul: Produktivitas Ulat Sutera (Bombyx mori L.) BS-09 di Kebun Percobaan Ulat Sutera IPB Ciapus Bogor
Abstrak: Ulat sutera merupakan serangga metabola yang mengalami metamorfosa sempurna yaitu telur, larva, pupa, dan ngengat. Pusat pembibitan ulat sutera yang menghasilkan ras hibrida BS-09 di Indonesia berada di dua wilayah, yaitu Candiroto (Jawa Tengah) dan Soppeng (Sulawesi Selatan). Penelitian ini dilakukan di Kebun Percobaan Ulat sutera IPB yang berada di Ciapus. Penelitian ini dilakukan sebagai pemodelan budidaya ulat sutera di daerah tersebut. Penelitian ini bertujuan untuk menganalisis produktivitas ulat sutera yang berasal dari dua sumber bibit dan jumlah pemberian pakan yang berbeda. Bahan yang digunakan adalah Bombyx mori L ras BS-09 yang terdiri dari masing-masing 1 200 ekor ulat asal bibit Candiroto dan Soppeng, serta jenis daun murbei Morus multicaulis. Rancangan percobaan yang digunakan adalah rancangan acak lengkap pola faktorial 2x2 dengan tiga ulangan. Data dianalisis menggunakan analisis varians (ANOVA), dilanjutkan dengan uji Tukey jika beda nyata. Sumber bibit Candiroto memiliki panjang, lebar dan berat tubuh yang lebih tinggi daripada bibit Soppeng, yang nilainya berturut-turut 3.3-62.3 mm, 0.6-7.9 mm, dan 0.005-3.087 g.
Keyword: Bombyx mori L., KPSA Soppeng, PPUS Candiroto, produktivitas

Judul: Glucose biosensor using a glucose dehydrogenase flavin adenine dinucleotide electrochemically immobilized on zeolite nanoparticles
Abstrak: A glucose biosensor was developed to measure blood glucose levels. The performance of these new glucose biosensors was continuously improved, producing better performance and stability. The technique selection and immobilization matrix are key factors for biosensor development, so that the prospecting of materials that can be used as a matrix for supporting enzyme, continue to be explore. The purpose of this study was to determine the activity and stability of the enzyme glucose dehydrogenase (GDH) that were immobilized on zeolite nanoparticles (NPZ) and determine the kinetic parameters and analytical performance by electrochemical methods. The resulting enzyme electrode with NPZ and enzyme electrode with zeolite A showed a high activity against the enzyme electrode glucose than without NPZ. The reaction kinetics of third electrodes of enzyme followed the Dixon equation. The 𝐼����𝑚����𝑎����𝑥����𝑎����𝑝����𝑝���� values for enzyme electrode without NPZ, with NPZ, and with zeolite A were 27.25 μA, 77.52 μA, and 48.54 μA, respectively. The 𝐾����𝑀����𝑎����𝑝����𝑝���� values for GDH enzyme that immobilized on the NPZ were 1.16 mM, 12.30 mM for GDH enzyme that immobilized on zeolite A and 0.95 mM for GDH enzyme immobilization without NPZ. The enzyme electrode without NPZ, with NPZ, and with zeolite A also showed a high sensitivity with value for the sensitivity were 0.58 μA mM-1, 0.81 μA mM-1, and 2.51 μA mM-1, respectively. The third enzyme electrodes showed different linear area with range for the enzyme electrode without NPZ, with NPZ and with zeolite A were 1.00-15.00 mM, 2.00-20.00 mM, and 0.06-10.00 mM, respectively. The blood glucose level of normal person ranged from 4 to 6 mM, so that the enzyme electrode with NPZ and without NPZ are suitable for use in the determination of the concentration of blood glucose. While the enzyme electrode with zeolite A has a smaller range so it is more suitable to use in the determination of glucose concentration in the foods or beverages. The enzyme electrode with NPZ and the enzyme electrode with zeolite A showed a good accuracy with relative error values were 3.84% and3.48%, respectively. Repeatability measurements also showed a good precission results with relative standard deviation values (%RSD) for the enzyme electrode with NPZ and enzyme electrode with zeolite A were 3.83% and 3.16%, respectively. By combining two immobilization techniques, physical adsorption on zeolite and entrapment on carbon paste, high enzymatic activity, good accuracy, and repeatability was attained. The enzyme electrode with NPZ and the enzyme electrode with zeolite A demonstrated a good electrochemical response toward glucose, allowing it to detect blood glucose levels and glucose levels in foods and beverages.
Keyword: glucose biosensor, immobilization, zeolite