Judul: Kajian Pertumbuhan Eksplan Pucuk Gaharu  (Gyrinops Versteegii (Gilg) Domke) Melalui Teknik Ex Vitro
Abstrak: In the year 1985, amount export of the gaharu Indonesia reach about 1487 ton, but exploit the tropical experienced forest and gaharu hunt which do not in control have resulted the species-species of gaharu become the rareness. As for this research target is to get the appropriate material composition for the growth of explan and to get the hormone concentration grow the IBA (Indole Butyric Acid) optimal for growth of root the eksplan sprout G. versteegii of through technique of ex vitro. Assorted of material grow and various concentration of IBA hormone can yield the growth which different each other, knowable so that composition of material and best hormone concentration for the growth of explan of gaharu sprout by ex vitro. Expected from this research result is obtained by information of about material grow appropriate and best hormone concentration for the growth of explan of sprout G.Versteegii (Gilg) Domke, applicable to so that utilize to support the continuation of plasma nutfah. In research implementation, appliance used : box mica, glass aqua 240 ml, cutter, cut the crop, mulch, paranet, board slice, steples, speryer, and lable paper. Substance used by for example explan of sprout Gyrinops versteegii, IBA hormone ( 400, 450, 500, 550, 600 ppm), growquick, benstar 50 WP, agrept 20 WP, material (land, sand, and compost), antracol, agristik, calcium carbonate. All eksplan is soaked at condensation (vitamin B1, sterilization, and hormone by various concentration), and also pasta oles of shares of jetty explan, direct planted each material (single land, single sand, and mixture land-sand-compost) is entered at box mica. Call a meeting to order and disteples and keep in mulch. Result of research the obtained percentage live equal treatment to 66,67%, while at control equal to 83,33%. This matter indicate that living of hormone not have an in with percentage live explan. High growth explan is also influenced by media type. While hormone very having an effect on to root. Seen from percentage take root pursuant to hormone concentration, concentration highest 550 ppm that is 95,52%. But, not far different from concentration 450 ppm with percentage take root to equal 95,16%. If evaluated from level of fifth concentration hormone, all concentration represent optimal concentration for the root of gaharu explan From previous result can be concluded that media composition which good to growth of gaharu explan is ground land single media with percentage live 89,33%. While hormone which optimal for the root of gaharu explan with concentration 550 ppm. But concentration 450 ppm also good to root, although not as optimal as concentration 550 ppm. But 450 ppm hormone concentration this can be efficient expense. Key words: Gyrinops versteegii (Gilg) Domke, Material, Hormone
Keyword: 

Judul: Kajian Penggunaan Hormon IBA, BAP dan kinetin terhadap Multiplikasi Tunas Tanaman Penghasil Gaharu (Gyrinops versteegii (Gilg) Domke) secara In Vitro
Abstrak: Agarwood is one of non timber products which has a high economic value. Nowadays, the demand of agarwood is still depending on natural forest. The high demand which is followed by high persecution of agarwood in natural forest make the population of agarwood highly decreased. In order to straighten up the agarwood production, the government with the President decision (Keppres No 43/1978) decide that to whom the exporter who has agarwood has to have a CITES license. The conservation to some variety of agarwood is increased; Aquilaria spp. and Gyrinops spp. Was included in Appendix II CITES on Oktober 2nd until 14th 2004 at Bangkok. This research was aimed to know the best combination of auxin (IBA) and cytokinin (BAP and kinetin) in basic medium of Murashige and Skoog towards the multiplications of Agarwood production plant explants by in vitro. The plant material that was used was the sterile explants sprout of G. versteegii. Explants was grew in MS medium with the addition of growth hormone IBA (concentration of 0.00, 0.05, 0.10 mg/l), BAP (concentration of 0.00, 0.10, 0.20 mg/l) and kinetin (concentration of 0.00, 0.20, 0.40 mg/l). This research was arranged using the RAL Factorial with 17 of treatments in 6 times repetition. The observation was done in 8 weeks after planting to all of explants that had been planting include some parameters such as the height growth, , internodes total, buds total, total of leaves, the mortality percentage, callus production process, browning and contamination. The result of this research showed that the combination treatment of BAP+IBA that produced the most of total average leaves was in the treatment of BAP 0.10 mg/l (22.83 sheets), whereas in combination of BAP + kinetin that produced the most of total average leaves was in the treatment of BAP 0.10 mg/l + kinetin 0.20 mg/l (30.00 sheets). The buds multiplication in treatment with BAP + IBA worked optimally in 4 MST, with the total of 7.00 of buds in the end of observation which produced by the treatment of BAP 0.10 mg/l + IBA 0.05 mg/l. The highest bud multiplication was produced from the combination of BAP and kinetin in the treatment of BAP 0.10 mg/l + kinetin 0.40 mg/l and BAP 0.20 mg/l with the total of 9.17 of buds. The percentage of explants that produce callus was 88,24% (90 of 102 explants). The conclusion of this research was the effect of the addition of plant growt regulator combination of IBA (concentration of 0.00, 0.05, 0.10 mg/l) with BAP (concentration 0.00, 0.10, 0.20 mg/l) and IBA (concentration 0.00, 0.05, 0.10 mg/l) with kinetin (concentration 0.00, 0.20, 0.40 mg/l) give the real response in parameter number of buds and leaves. Whereas on parameter like the height growth and internodes total give real and not different response.
Keyword: 

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
Keyword: