Judul: Pengembangan Uji Cepat Viabilitas dan Vigor Benih Kacang Tanah (Arachis hypogea L.) Menggunakan Pengukuran Respirasi dengan Alat Kosmotektor.
Abstrak: The aim of this research is to study of peanut seed vigor testing (Arachis hypogeae L.) by the method of respiration, especially using a cosmotector. The research was done on September to Desember 2011 in Seed Technology Laboratory and Post Harvest Laboratory, Department of Agronomy and Horticulture, Agricultural Faculty, Bogor Agricultural University, Bogor. The research consist of two combination studies. The research has six combinations of treatment between long moisturizing and long incubation at a temperature of 600C with the vigor of peanut seed. There are long moisturizing for 10 hours (L1), 15 hours (L2), and 20 hours (L3). And also long incubation at a temperature of 60o C for 15 minutes (O1), 30 minutes (O2), and 45 minutes (O3) which applied in four different level of seed vigor. There are storage at temperature of 18o C for 4 weeks (V1), accelerated ageing test of physically for 2 days (V2), 4 days (V3), and 8 days (V4). The result showed that all treatments has positive correlation for all benchmarks. The most appropriate method used to measurement of respiration rate of peanut seeds with pretreatment temperature of incubation at 60oC for 45 minutes. Alternative methods that can be used is moisturizing for 15 hours, and than seeds were incubated for 24 hours. Respiration rate was measured using a cosmotector.
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Judul: Pengembangan uji cepat vigor benih kedelai  (Glycine max l. Merr.) Menggunakan metode respirasi dengan alat kosmotektor
Abstrak: The research was conducted to learn the utilization of tools cosmotector as a tool for rapid testing of soybean (Glycine max L. MERR.) seed vigor. This tool is used to measure the levels of CO2 produced from respiration processes of soybean seeds and then calculated the rate respiration. This research was conducted from February to May 2011 at the Laboratory of Seed Technology and Post Harvest Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, IPB. Prior research done by finding the pretreatment so we get the five groups of seeds that have different vigor of a seed same vigor group. Then measured the rate of respiration by several pretreatments, there are moistened for 10 hours, 15 hours, and 20 hours, and incubation at temperatures 600C for 15 minutes, 30 minutes, and 45 minutes. The conclusion of this research is cosmotector tool can be used for rapid testing of soybean seed vigor by measuring the rate respiration. The best pretreatment for measuring respiration rate of soybean seeds with such a device is incubation at temperatures 600C for 45 minutes. This method can determine seed viability and vigor well.
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Judul: Graf Pembagi-Nol Planar dan Tak-Planar
Abstrak: Graf pembagi-nol adalah suatu graf yang dibentuk dari himpunan pembaginol pada ring. Graf pembagi-nol terdiri atas himpunan simpul yang merupakan elemen-elemen pembagi-nol dari ring, serta dua simpul adjacent jika dan hanya jika hasil kalinya sama dengan nol. Graf pembagi-nol dapat digambarkan dalam sebuah bidang sedemikian rupa sehingga tidak ada dua sisi yang saling berpotongan. Graf pembagi-nol ini disebut sebagai graf planar. Karya ilmiah ini menjelaskan pembuktian teorema bahwa jika suatu graf pembagi-nol mempunyai graf yang isomorfik dengan graf lengkap dengan lima simpul atau graf bipartite lengkap dengan masing-masing himpunan simpul sebanyak tiga simpul, maka graf pembagi-nol ini bersifat tak-planar. Karya ilmiah ini juga membuktikan beberapa graf pembagi-nol merupakan graf planar atau tak-planar.
Keyword: ring, graf pembagi-nol, graf planar