Judul: Deteksi status vigor benih kedelai (Glycine max L. Merr) melalui metoda uji daya hantar listrik
Abstrak: Identity of seed quality written at seed label consisted of data of water content, purity of seed and seed germination (SG). SG is physiological quality data of seed which is obtained by germination test that performed in optimum and controlled condition yields a maximum germination. Practically, cultivation in field scale more often not optimize than in laboratory, so that, high germination seed may perform low seed germination in field scale. Based on this fact, it is required germination test which may detect the ability of seed germination precisely and the correlation with growth in the field. Conductivity Test is one of vigor examination which particularly excellence. This test is vigor examination for pea seed (Pisum sativum). The result of electric conductivity of soybean seed may not accepted as formal method in ISTA Rules, therefore further research is required to prove it scientifically. The experiment was aimed (1) to study the effect of different varieties (large and medium size) on seed conductivity and some parameters of vigor, (2) to study the effect of storage period on conductivity and some parameters of vigor (3) to study the effect of interaction between varieties and seed longevity on seed conductivity and some parameters of vigor, (4) to study the correlation between soybean seed conductivity and some parameters of seed vigor, (5) to study the estimation of seed longevity by using seed conductivity The experiment was conducted in the laboratory of BBPPMBTPH, Cimanggis, Depok from December 2006 up to June 2007. The experiment was arranged in Split Plot Design with two factors. The first factor was variety which was consisted of 6 levels i.e. Panderman, Burangrang, Baluran, Sinabung, Wilis and Kaba. The second factor was storage period which was consisted of 8 levels i.e. 0, 3, 6, 9, 12, 15, 18, 21 weeks. The observation was done in every 3 weeks. The parameters were seed quality (viability and vigor test) i.e. water content (WC), electric conductivity (EC), seed germination (SG), index vigor (IV), speed of germination (SoG), viability after accelerated ageing (VAA), and field emergence (FE). The result showed that large size soybean variety has WC, FE, and EC which is not significantly different from medium size soybean variety, meanwhile for variable of IV, SoG, and VAA of large size soybean variety has lower value than medium size. Variable of SG and K ion from large size soybean variety has higher value level. The changes in SG, VI, SoG, VAA, FE, EC and K ion during storage period was differ among varieties. Variety of Burangrang is variety which capable to maintain the longest viability and vigor and then followed by variety of Kaba. Regression and correlation analysis showed that the conductivity test closely related to seed vigor, so that the conductivity test could be used for determination of seed vigor. Conductivity test could be used for estimating soybean field emergence and seed storability. The estimation of soybean field emergence could be obtained by equation of y = -0.195X2 + 4.3296X + 80.165. The estimation of large size seed longevity could be determined by equation y = 0.0328X2
Keyword: Conductivity test, Soybean, Glycine max L. Merr, Seed Vigor

Judul: Development of Soybean (Glycine max (L.)) Seed Viability Test Method using Urine Sugar Analysis Paper (USAP)
Abstrak: Kedelai (Glycine max (L.)) merupakan salah satu komoditas utama selain padi dan jagung di Indonesia. Permasalahan yang dihadapi dalam penyediaan benih kedelai bermutu adalah daya simpan benih kedelai yang pendek. Penelitian bertujuan mengembangkan metode uji vigor benih menggunakan urine sugar analysis paper (USAP) pada berbagai tingkat vigor benih kedelai yang diperoleh dari metode pengusangan cepat. Percobaan disusun menggunakan rancangan acak lengkap (RAL) satu faktor dengan empat ulangan yang terdiri dari dua percobaan. Percobaan pertama adalah metode pengusangan cepat bersuhu 40 C dan RH 95%. Percobaan kedua adalah mengembangkan metode urine sugar analysis paper terhadap lot benih yang diperoleh dari pengusangan cepat dengan menentukan lama perendaman benih yang efisien dengan taraf 1, 3, dan 5 jam. Percobaan dilakukan terhadap dua varietas secara terpisah yaitu varietas Anjasmoro dan Gepak kuning. Hasil penelitian menunjukkan pengusangan cepat dapat menurunkan vigor dan viabilitas benih kedelai. Pada varietas Anjasmoro, lama perendaman 5 jam merupakan metode efektif untuk pengujian kebocoran glukosa dan protein yang berkorelasi kuat dengan tolok ukur daya kerkecambah, kecepatan tumbuh, dan nilai daya hantar listrik. Pada varietas Gepak kuning, lama perendaman 1 jam merupakan metode efektif untuk pengujian kebocoran glukosa dan protein yang berkorelasi kuat dengan tolok ukur daya berkecambah dan nilai daya hantar listrik., Soybean (Glycine max (L.)) is one of the main commodities besides paddy and corn in Indonesia. The problem faced in providing good quality of soybean seeds is the short shelf life of soybean seeds. This research aims to develop a seed vigor test method using Urine Sugar Analysis Paper (USAP) at various levels of soybean seed vigor, that was obtained from the Accelerated Aging Method. The experimental design that used in this research was a Completely Randomized Design (CRD) one factor with four replications consisting of two trials. The first experiment was the accelerated aging using the Accelerated Aging Method (AAM) at a temperature of 40 °C. The second experiment was to develop an Urine Sugar Analysis Paper method on seed lots that was obtained from accelerated aging by determining the efficient soaking time of seeds at levels of 1, 3, and 5 hours. Experiments were carried out on two varieties separately, namely Anjasmoro and Gepak kuning varieties. The results showed that accelerated aging could reduce the vigor and viability of soybean seeds. For the Anjasmoro variety, 5 hours of soaking time is an effective method for testing glucose and protein leakage which is strongly correlated with germination, growth seed, and electrical conductivity. For the Gepak kuning variety, 1 hour of soaking time is an effective method for testing glucose and protein leakage which is strongly correlated with germination and electrical conductivity.
Keyword: accelerated aging, vigor, correlation, glucose, protein, pH

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology