Judul: Kultur Biji Amorphophallus decus-silvae pada Beberapa Kombinasi Sitokinin dan Auksin secara in vitro
Abstrak: Amorphophallus decus-silvae is focused in this research study specifically in plant growth regulator for seed germination and shoot production. The statistic model used was completely randomized design one factor with 9 medium composition with 0.5 MS basal medium + B5. Each medium had 20 bottle culture and totally 180 explants culture. The explants used were 3-4 week after pollination. In Amorphophallus decus-silvae seed tissue culture, 81.67 % sterilization success by using a method of seed immersion for 1 minute in antiseptic liquid and 15 minute in bleach 15 %. Medium 2 ppm BAP + 0.1 ppm IBA resulted in 94.1% explants germination. After 18 weeks planted in medium 2 ppm BAP + 0.1ppm IBA, the seed culture of Amophophallus decus-silvae produced 10.3 (top explants) and 7.3 (bottom explants) shoot. After 28 week, the total number of micro shoot are 30.4 in medium 2 ppm BAP + 0.1 ppm. Explants from 0.5 MS0 without growth regulator had 5.4 cm height after 28 week in 3 ppm GA3 medium. In acclimatization all plant (20 plantlet) could survived for 2 week observation
Keyword: planlet, micro shoot, organogenesis, glukomanan, Amorphophallus decus-silvae

Judul: In Vitro Shoot Induction of Kaempferia parviflora Wall. Ex. Baker
Abstrak: This research aimed to find the best MS salt concentration and cytokinin (BAP) concentration for K. parviflora rapid multiplication by using in vitro buds as explants. The experiment was done at Plant Tissue Culture Laboratory of Agronomy and Horticulture Department, Faculty of Agriculture, Bogor Agricultural University from January to November 2011. This research began by sterilizing shoots of K. parviflora rhizomes received from PT. Ogawa Indonesia to produce axenic culture. After about 8 weeks of growth, young shoots began to sprout. The young shoots of K. parviflora axenic culture were then cut and cultured individually on the treatment medium, which consist of two different MS salt concentrations (MS and ½ MS) and five different 6-benzylaminopurine (BAP) concentrations (0, 1.25, 2.5, 3.75, and 5 ppm) respectively. Explants started to grow after 2 weeks of culture. Both MS salt concentration and BAP concentration treatments did not give a significant effect on the first shoot induction time, but ½ MS medium supplemented with 5 ppm BAP could induce first shoot faster than other treatments, which is within an average of 2.5 weeks after cultured (WAC). At early observation (2 to 4 WAC), medium enriched with 3.75 ppm BAP induced more shoot than the other treatments, but at the end, control medium (MS0) induced more shoot than other treatments. Starting from 2 WAC, the explants cultured on 0 ppm BAP medium grow more rapidly than the other treatments, but after 10 WAC, they grow slower. All treatments have the same trend of leaf growth. At 2 to 8 WAC, the number of leaves is rising rapidly, but at the 9 WAC, it began to slow down.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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