Judul: Pemanfaatan Tris Sari Kedelai Sebagai Bahan Pengencer Semen Cair Kambing Peranakan Etawah.
Abstrak: This research was aimed to examine and find the best concentrations of soybean extract in Tris buffer (TS) for Etawah Cross Breed (ECB) semen extender. Three sexually mature and healthy ECB buck were used as a source of semen. The semen was collected using an artificial vagina and evaluate macro- and microscopically. Ejaculate having > 70% sperm motility, > 2500x106ml-1 sperm concentration and < 15% abnormal sperm were individually processed. Each ejaculate divided into five tubes. Four tubes were mixed with 2.50% TS (TS2.50), 3.75% TS (TS3.75), 5.00% TS (TS5.00), and 6.25% TS (TS6.25), one other tubes was diluted with Tris egg yolk extender (TEY) with the concentration of spermatozoa was 50x106ml-1. The semen stored at 3-5oC and observed its sperm motility and viability every 12 hours until 72 hours of storage. After 72 hours of storage result showed that TEY was the best sperm extender (p<0.05) on the sperm motility as well as sperm viability compared to TS in all concentration. TS2.50 (58.33 ± 2.50%) and TS3.75 (50.56 ± 4.46%) was the best TS concentration compared to TS5.00 or TS6.25. For artificial insemination purpose, sperm extender in TEY, TS2.50 and TS3.75 can be used until 72 hour of storage.
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Judul: Kualitas semen beku kambing peranakan etawah menggunakan modifikasi pengencer tris soya dan tris kuning telur
Abstrak: Reproduction of goats in Indonesia mostly managed by natural mating, while the Artificial Insemination (AI) has been limited. The success rate of AI in goats has been low because of some factors, one of those has been identified as the low quality of extender. Tris Egg Yolk (TEY) and AndroMed® have been widely used for extenders of frozen semen in goats. Effect of Tris Soya (TS) that have lesitin nabati and studies to describe the profiles of each extenders to the sperm quality have been quite limited. The aim of this study was to compare TEY, AndroMed® and TS extenders on sperm motility and viability before and after freezing of goats semen. Semen was collected from three sexually mature Etawah Crossbreed goats twice a week, each semen sample was divided into three tubes to be mixed with TEY, AndroMed® or TS before those got frozen. Sperm motility and viability were evaluated macroscopically before freezing and microscopically before and after freezing. The result of this study revealed that TEY and AndroMed® gave higher sperm motiliy (68.52±0.64% and 68.71±1.95%) than TS (37.03±4.25%). The viability of sperm was also higher in TEY and AndroMed® (73.45±1.52% and 73.94±1.31%) compared TS (46.76±4.76%). It was concluded that TEY and AndroMed® were better extenders to protect goats sperm compared TS.
Keyword: AndroMed®, Etawah Crossbreed, frozen semen, Tris Egg Yolk, Tris Soya.

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular