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: Multiplikasi Tunas Suweg (Amorphophallus paeoniifolius (Dennst.) Nicolson) dengan Zat Pengatur Tumbuh BAP dan NAA secara Kultur Jaringan
Abstrak: The utilization of suweg (Amorphophallus paeoniifolius) in Indonesia has been known since the Japanese colonial period as source of carbohydrate. Suweg is beneficial for diabetes, digestion, liver, and increase appetite. The cultivation of suweg is by planting its eye shoot of tuber’s skin, the main eye shoot of tuber, the whole tuber, sapling from the tuber, and seedling. But, there are some problems with that technique which are the habitat where it grows, planting time, and the quality of the result is not uniform. So another cultivation effort is needed which is tissue culture. Based on Isnaini et al. (2012), tissue culture of suweg produces few shoots so it needs further study in order to produce many shoots in a callus. This research was done by the addition of Plant Growth Regulators (PGR) NAA and BAP that is potential for shoot growth. The aim of this study is to determine the effect of BAP and NAA in suweg shoot multiplication. This research was conducted at the Laboratory of Plant Tissue Culture Conservation Centre Bogor Botanical Garden, from June until September 2012. The research was designed by using a two-factor factorial experimental design on the basis of completely randomized design (CRD). The first factor is the concentration of BAP with four levels which are 0 mg/l, 1 mg/l, 2 mg/l, and 3 mg/l. The second factor is the NAA concentrations with four levels which are 0 mg/l, 0.25 mg/l, 0.5 mg/l, and 0.75 mg/l. Observed was done to explants browning, contamination (bacteria and fungi), callus color, callus texture, number of shoot, and the number of roots. The result shows the percentage of successful explant survival is 94.17% or 226 explants. Contamination by bacteria and fungi are 2.08 or 5 explants, and browning are 3.75% or 9 explants. Explant with compact texture is 34.58% and explant with crumb texture is 63.33%. The most root growth was found in the treatment of 1 mg /1 BAP + 0.75 mg/l NAA is 2.87 root/ week. The highest number of shoot in the treatment of 1 mg/l BAP + 0.25 mg/l NAA is 0,47 shoot/ week. The conclusion of this study is that the shoot multiplication was occurred in three explants, which are in the treatment of 1 mg l BAP + 0.25 mg/l NAA, 3 m/l BAP + 0.5 mg/l NAA and 3 mg/l BAP + 0.75 mg/l NAA.
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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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