Judul: Kualitas kokon hibrid ulat sutera (Bombyx mori L.) berdasarkan umur kokon
Abstrak: Cocoon l~arvestt ime significantly influenced the cocoon quality. Cocoon is harvested when the pupa is formed, the body becomes brown and h e skin is hard enough. The aim of this research was to investigate the influence of cocoon age on the cocoon quality and pupae complete fornl from two silkworn1 hybrids i.e. BS 07 and BS 10, and each hybrid differed by sex. The research was done from 1" to March 3oth 2006. The data were collected from three days old up to six days old cocoon and was analyzed using repeated measures of variance and completely randomized design of factorial pattern 2x2 with 5 replications. If the trearment had significantly effect on the variable that measured, it was continued with Least Squares Means Method. The parameters observed in this research were cocoqn we ght, single shell weight, shell ratio 2nd the complete fo~mo f pupae. The result of this research indicated significantly effect (Pi0,Ol) on cocoon weight, single shell weight and shell ratio and there was interaction among silkworm strain, scx and cocoon age. Cocoon weight, single shell weight and shell ratio were decline from three days old to four days old cocoon. Cocoon weight was decrease at four days old to six days old cocoon, but single shell weight and shell ratio were constant. Mortality between 5 to 10% from thee d;ys old up to six days old cocoon. Keywords: Silkworm, cocoon quality, pupac agc
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Judul: Coccon Quality of Silkworm Bombyx mori L BS-09 with A Kind of Diffrent Mulberry in Laboratory Faculty of Animal Science.
Abstrak: Ulat sutera B.morimerupakan jenis serangga yang memiliki nilai ekonomis tinggi karena dapat membentuk kokon dari serat sutera.Ulat sutera B.mori dapat tumbuh optimal pada suhu lingkungan 24-28ºC, kelembaban 70% -90%, dan ketinggian 304.8–1524 mdpl. Suhu, kelembaban, bibit, dan pakan akan mempengaruhi kualitas kokon sutera. Terdapat pusat pembibitan ulat sutera terbesar di Indonesia, yaitu di PPUS Soppeng dan PPUS Candiroto.Tujuan penelitian ini adalah mengevaluasi kualitas kokon ulat sutera B. moridari kedua pusat pembibitan tersebut yang dipelihara di Laboratorium Lapang Fakultas Peternakan IPB. Lokasi penelitian berada di ketinggian minimum dari persyaratan hidup ulat sutera B.mori yaitu 190-330 mdpl. Kualitas kokon dapat dilihat dari bobot kokon, bobot kulit kokon, panjang filamen, diameter filamen, daya urai, dan kekuatan tarik filamen. Jumlah kokon yang digunakan pada perlakuan Soppeng Multicaulis, Soppeng Chatayana, Candiroto Multicaulis, dan Candiroto Chatayana dengan waktu penyimpanan yang berbeda masing-masing sebanyak tiga buah.Pakan yang digunakan adalah daun murbei Morus multicaulis dan Morus chatayana. Analisis data yang digunakan adalah Rancangan Acak Lengkap pola Faktorial 2x2 dengan tiga kali ulangan untuk masing-masing perlakuan. Hasil menunjukan tidak ada perbedaan dari perlakuan terhadap peubah yang diamati. Kekuatan tarik filamen pada penyimpanan kokon dua bulan terdapat interaksi antara bibit dan jenis daun. Kesimpulannya adalah kokon dari PPUS Soppeng dan PPUS Candiroto memiliki kualitas yang sama baik.
Keyword: IPB, IPB (Institut Pertanian Bogor), Bogor Agricultural University, Bombyx mori, Coccon, Morus chatayana, Morus multicaulis, Quality, Farming coccon, Soppeng multicaulis, Fibers silk, Coccon quality, Soppeng chatayana

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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