Judul: Alteration of Hatching Eggs of Eri Silkworm (Samia cynthia ricini) Using Photoperiod Method
Abstrak: Industri tekstil merupakan salah satu industri penunjang perekonomian di Indonesia. Ulat sutra Samia cynthia ricini merupakan jenis ulat sutra Eri yang banyak dibudidayakan karena memiliki nilai ekonomis yang tinggi. Produksi telur yang dihasilkan oleh ngengat S. c. ricini dalam jumlah yang besar menyebabkan timbulnya keterbatasan dalam penyediaan pakan sehingga dibutuhkan metode untuk mengatur waktu penetasan. Penelitian ini bertujuan mengkaji hubungan antara lama waktu penyinaran (photoperiod) terhadap lama waktu penetasan dan pola perkembangan embrio pada ulat sutra Eri (Samia cynthia ricini). Peubah yang diamati yaitu daya tetas, mortalitas, rataan waktu penetasan, dan perkembangan embrio. Pemberian cahaya 8 jam terang dan 16 jam gelap (8L:16D) selama penetasan telur menunjukkan waktu penetasan yang lebih lambat dan mampu menunda penetasan sekitar dua hari. Pola perkembangan embrio tidak menunjukkan perbedaan yang signifikan pada setiap perlakuan., The textile industry is one of the industries that support economic development in Indonesia. Samia cynthia ricini is a type of eri silkworm widely cultivated because it has high economic value. However, the production of eggs of S. c. ricini in large numbers cause problems due to limited feed availability, so a method is needed to regulate the hatching time. This study aimed to examine the relationship between the length of lighting (photoperiod) to the length of time of hatching and embryo development in the silkworm eri. The observed variables were hatchability, mortality, hatching time, and embryo development. Providing 8 hours of light and 16 hours of darkness (8L:16D) during hatching shows a slower hatching time and can delay hatching time by around two days. Embryo development did not show significant differences in each treatment.
Keyword: Photoperiod, Samia cynthia ricini, Hatching time

Judul: Productivity of Eri Silkworm (Samia cynthia ricini) of White  Plain and Blue Plain Colour of Larvae
Abstrak: Industri tekstil merupakan salah satu komoditas unggul di Indonesia yang memanfaatkan serat ulat sutra sebagai bahan baku tekstil. Samia cynthia ricini mampu berkembang biak lebih dari dua generasi dalam satu tahun (multivoltine). Faktor yang dapat memengaruhi produktivitas ulat sutra, antara lain kondisi lingkungan, kecukupan nutrisi, genetik, dan manajemen pemeliharaan. Tujuan penelitian ini adalah menganalisis produktivitas ulat sutra eri (S. ricini) pada warna larva putih polos dan biru polos. Penelitian ini menggunakan larva S. ricini berwarna putih polos dan biru polos. Parameter yang diamati antara lain suhu dan kelembapan, konsumsi pakan, panjang, lebar, dan bobot tubuh larva, lama tiap fase instar, mortalitas per instar, karakterisasi kokon, kualitas serat sutra, dan pewarisan pola warna larva. Data yang diperoleh dianalisis menggunakan uji-T. Hasil penelitian menunjukkan morfometrik tubuh larva pada warna biru polos lebih tinggi dibandingkan warna putih polos. S. ricini warna biru polos memiliki gen yang lebih dominan, sehingga mewariskan dua pola warna, yaitu 83% putih polos dan 17% biru polos., The textile industry is one of the superior commodities in Indonesia that uses silkworm fiber as a textile raw material. Samia cynthia ricini is able to breed more than two generations in one year (multivoltine). Factors that can affect silkworm productivity are environmental conditions, nutritional adequacy, genetics, and rear management. The purpose of this research is to analyzed the productivity of eri silkworms (S. ricini) of white plain and blue plain colour of larvae. This research used S. ricini larvae of white plain and blue plain. The observed parameters include temperature and humidity, feed consumption, length, width, and body weight of larvae, length of each instars phase, mortality per instars, quality of cocoon, quality of silk fibre, and inheritance of larvae colour. The data were analyzed using the T test. The result showed that the morphometric of blue plain was higher than white plain. Blue plain of S. ricini has more dominant gene, thus inheriting two color patterns, with the percentage of 83% for white plain and 17% for blue plain.
Keyword: blue plain, colour of larvae, productivity, Samia cynthia ricini, white plain

Judul: Pelabelan Super Vertex Magic
Abstrak: Super vertex magic labeling is labeling on graph with is a set of edges mapped into and is a set of vertices mapped into . It has a vertex magic labeling in which and represents the size and order of the graph respectively. This manuscript proves that paths, cyclics, and disjoint union of cyclics have a super vertex magic labeling. There are four theorems to be discussed. The first theorem proves that path is super vertex magic if and only if is odd and . The second theorem proves that cyclic is super vertex magic if and only if is odd. The third theorem proves that bijection function from an edge set onto of graph can be extended to a super vertex magic labeling if and only if the set amount of edge label that incidents with a vertex in the graph, consists of sequential integers as many as vertices in the graph. The fourth theorem proves that disjoint union of the cyclics consists of cyclics with each cyclic has vertices is super vertex magic if and only if and are odd.
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