Judul: Inisiasi Rimpang Mikro Kaempferia parviflora Secara In Vitro dengan Penambahan BAP dan Sukrosa
Abstrak: Kaempferia parviflora is a medicinal plant that contains secondary metabolites and efficacious for treating various diseases. Rapid multiplication of K. parviflora through its rhizome is hamprered by the long period needed to produce the rhizome. The objectives of this research were to obtain the best sucrose concentration and to determine the best BAP concentration in the in vitro micro rhizome initiation of K. parviflora. The experiment was arranged in a randomized complete block design with two factors and three replications. The first factor was BAP concentration, consisted of three levels i.e. 0, 2, and 4 mg L¯1. The second factor was sucrose concentration, consisted of four levels i.e. 0, 30, 60, and 90 g L¯1. Data obtained were analyzed by F-test, followed by DMRT (Duncan Multiple Range Test) at 5 % significant level. Sucrose concentration significantly affected the number of shoots and plantlets fresh weight. The results showed that K. parviflora could form micro rhizome in vitro, as indicated by the similar anatomical structure compared to the rhizome produced in vivo. K. parviflora cultured in MS medium cointaining 90 g L¯1 sucrose without BAP had the highest number of micro rhizome at 8 WAC.
Keyword: Bogor Agricultural University (IPB), traditional medicine, black galingale, health

Judul: Pematahan Dormansi Rimpang Kaempferia parviflora Wall Ex. Baker
Abstrak: Kaempferia parviflora (Zingiberaceae family) has a potency to be developed for a new medicinal plants in Indonesia. One of problems in its cultivation is the lack of planting material availability due to the long dormant period. The objectives of this research were to study the effect of various concentrations of BAP and ethephon, and also the effect of the prior growing condition to the dormancy breaking and shoot growth of K. parviflora rhizome. Two separate experiments were applied for two lots of rhizomes namely Cikabayan and Pasir Sarongge lots. Each experiment was arranged in completely random design with 2 factors. Experiment-1 used 4 concentrations of BAP (0, 50, 100, and 150 ppm) as the first factor. While, experiment-2 used 5 concentrations of ethephon (0, 200, 400, 600 and 800 ppm) as the first factor. The second factor in both experiments were prior shade condition at 55% artificial shading and natural shading. A rhizome without soaked application (control) and a rhizome with soaked by aquadestilata without PGRs (0 ppm) were used as compared items. Data was analyzed with ANOVA. Combined Analysis of Variance and t-test were performed in order to compare between 2 lots. Result showed that concentration of BAP until 150 ppm and concentration of ethephon until 800 ppm were not effective to stimulate bud induction time. Meanwhile, rhizome from 55% artificial shading had a shorter periode of dormancy than the natural shading. In the addition, plants from Pasir Sarongge rhizomes lot had more plant number, plant height, leaf number, leaf length, and leaf width than Cikabayan rhizomes lot.
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Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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