Judul: Peran ekstrak tempe pada tikus jantan usia prapubertas terhadap perkembangan reproduksi
Abstrak: Phytoestrogens are substances in plants and have similar structure to estrogen. Tempe is a processed soy beans that are source of phytoestrogens. This study was conducted to determine the role of tempe extract in prepubertal male rats (weaning) to the growth of the reproductive system. A total of 18 male rats weaning age of 21 days were divided into 2 groups, control and treatment groups that were given a soybean extract 6.25g/KgBW at age 21 to 48 days. Parameters observed were testicular weight, reproductive hormones, sperm presence, and body weight. Data were collected at the time of male rats aged 28, 42, and 56 days. Data was analyzed using t-test with 95% confidence interval (α=0.05). The results showed that tempe extract in prepubertal male rats influenced in increased body weight of male rats aged 42 and 56 days, body weight gain of male rats at the age of 28–24 days, estrogen level at the age of 42 days and the ratio of testosterone to estrogen at the age of 56 days. However, there was a delay in the formation of sperm at the age of 56 days.
Keyword: male rats, phytoestrogen, prepuberty, reproduction development, tempe extract.

Judul: Peran Ekstrak Tempe terhadap Kinerja Organ TestisAnak Tikus Usia Prapubertas
Abstrak: Tempe is a fermented soy product from Rhizopus sp., and it contain phytoestrogens derived from the isoflavones group. This research was conducted to study the potential of tempe extract to the reproduction performance of prepuberty male rats (Rattus norvegicus). Rats were divided into two groups, which were control group without given any therapy and treatment group that has been given 0.25 g/kgBW/day of tempe extract from the age of 21-days old until 48 days-old. At the age of 28, 42, and 56 days, samples of testes, and blood were collected from male rats. The parameters observed were the wet and dry weight, the total of DNA and RNA, and testosterone concentration. Data were analysed using an Independent Samples T-Test method with 95% confidence interval. Results showed that increasing of the rates of testosterone hormone at the age of 42 and 56 days, increasing in total of RNA at the age 28 and 42 days, but decreasing in total of DNA rats given phytoestrogen therapy.
Keyword: total of DNA and RNA, testosterone, testes, tempe, phytoestrogens

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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