Judul: Combination of Planting Media and Explant Treatment in In Vitro Tissue Culture of Aren (Arenga pinnata (Wurmb) Merr.) Seeds
Abstrak: Kultur jaringan dapat digunakan sebagai teknik budidaya tanaman dengan waktu dormansi lama, seperti aren. Namun pertumbuhan eksplan kultur jaringan juga dipengaruhi oleh berbagai faktor, salah satunya kontaminasi. Penelitian ini bertujuan mengidentifikasi dan mendeskripsikan keberhasilan serta pertumbuhan eksplan pada kultur jaringan aren (Arenga pinnata). Biji aren disterilisasi di luar Laminar Air Flow dan di dalam Laminar Air Flow lalu dibagi ke dalam 12 kombinasi perlakuan media dan eksplan. Hasil penelitian menunjukkan kontaminasi eksplan dominan disebabkan oleh cendawan eksternal pada kulit biji eksplan. Browning terjadi pada eksplan embrio di dalam media MS, BAP2, glisin, pepton, dan myo-inositol yang mengalami proses pertumbuhan kalus. Eksplan steril hingga akhir pengamatan merupakan eksplan embrio pada ketiga jenis media tanam yang digunakan. Pertumbuhan eksplan tertinggi pada media MS 0 dan media kombinasi MS, BAP 2, Myo-inositol, Glisin, dan Pepton dengan jenis ekplan biji dikupas lalu direndam larutan giberelin., Tissue culture is a technique that can be used to cultivate plants that have a long dormant period, such as the sugar palm. However, contamination is one element that affects the growth of tissue culture explants. The purpose of this research is to determine and report the success and growth of sugar palm explants in tissue culture (Arenga pinnata). palm seeds were sterilized outside the laminar air flow and inside the laminar air flow then separated into 12 different medium and explant treatment combinations. The results showed that the dominant explant contamination was caused by external fungi on the explant seed coat. Browning was observed in embryo explants grown on MS, BAP2, glycine, peptone, and myo-inositol medium during the callus formation process. Sterile explants until the end of the observation were embryo explants on the three types of growing media used. Explants grew the fastest on MS 0 media and a mixture of MS, BAP 2, Myo-inositol, Glycine, and Peptone media with peeled seed explants immersed in gibberellin solution.
Keyword: aren, kontaminasi, sterilisasi, sugar palm, contamination, sterilization

Judul: Effect of Addition of Several Combinations of Growth Regulatory Substances (PGR) and Pre-Treatment Media on In Vitro Growth of Sugar Palm (Arenga pinnata Merr) Zygotic Embryos.
Abstrak: Aren (Arenga pinnata Merr) merupakan famili Arecaceae yang tumbuh soliter. Tanaman ini memiliki tandan yang ditumbuhi oleh buah aren. Buah aren memiliki embrio yang dapat digunakan sebagai bahan perbanyakan secara generatif. Perbanyakan bibit aren melalui embrio diharapkan dapat menghasilkan bibit secara cepat dan berkualitas. Tujuan penelitian ini untuk melakukan evaluasi pengaruh pemberian kombinasi ZPT dan media pra perlakuan pada tanaman aren secara in vitro dalam petumbuhan dan perkembangan membentuk tunas. Hasil penelitian menunjukkan bahwa pemberiaan kombinasi ZPT dan penggunaan media pra perlakuan secara masing-masing berpengaruh dalam pertumbuhan embrio aren. Pemberian kombinasi terbaik dengan BAP 7,5 ppm + IAA 2 ppm menunjukkan pengaruh yang nyata terhadap kontrol dalam pertumbuhan kecambah embrio aren hingga membentuk tunas dan media tanpa pra perlakuan menunjukkan hasil terbaik dalam pertumbuhan embrio menjadi tunas. Pemberian ZPT dan pengunaan media pra perlakuan berpengaruh dalam pertumbuhan embrio aren., Aren (Arenga pinnata Merr) is a solitary growing family of Arecaceae. This plant has bunches overgrown with palm fruit. Palm fruit has an embryo that can be used as a generative propagation material. Propagation of palm seeds through embryos is expected to produce seeds quickly and with quality. The purpose of this study was to evaluate the effect of giving a combination of PGR and pre-treatment media on sugar palm plants in vitro on growth and development to form shoots. The results showed that the combination of PGR and the use of pre-treatment media each had an effect on the growth of sugar palm embryos. Giving the best combination with BAP 7.5 ppm + IAA 2 ppm showed a significant effect on control in the growth of sugar palm embryo sprouts to form shoots and media without pretreatment showed the best results in embryo growth into shoots. The administration of PGR and the use of pre-treatment media had an effect on the growth of sugar palm embryos.
Keyword: Embryo, in vitro, pre-treatment, sugar palm

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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