Judul: Pengembangan uji cepat vigor benih jagung ( Zea mays l. ) dengan alat pengukur laju respirasi kosmotektor
Abstrak: The purpose of this research was to obtain the method of corn seed (Zea mays. L) quick vigor testing by cosmotector (respiration measuring tools). This research was conducted in Seed Science and Technology Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Darmaga from February 2011 to May 2011. Simple Regression and Correlation Analysis was follow to conducted the experiment, consisted of six combination treatment between four level of corn seed vigor and the time of seed moistened also seed incubated by oven (60ºC), i.e. O1 : seed incubated by oven during 15 minutes, O2 : seed incubated by oven during 30 minutes, O3 : seed incubated by oven during 45 minutes, L1: seed moistened during 10 hours, L2 : seed moistened during 15 hours, L3 : seed moistened during 20 hours. These treatments were given to trigger the respiration’s rate of corn seed. The result showed that there are positive correlations between vigor and viability parameters with respiration’s rate of corn seed. The method that has a real correlation value was shown by L2 (seed moistened during 15 hours). It can used to detect the status of corn seed vigor and viability by its respiration’s rate.
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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