Judul: Induksi Kalus dan Embrio Somatik Tanaman Jambu Biji Merah (Psidium guajava L.)
Abstrak: The objective of the research was to get the best protocol for callus and somatic embryo induction of guava. The experiment was conducted at Tissue Culture Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University from September 2012 until March 2013. The research was arranged into two experiments, that were callus induction and somatic embryo induction. The results showed that media with plant growth regulator composition treatments R2 (MS + 5 mg l-1 2.4-D), R4 (MS + 5 mg l-1 2.4-D + 1 mg l-1 BAP) and R5 (MS + 2.5 mg l-1 2.4-D + 2 mg l-1 2-iP) were the best treatments for inducting compact callus in 4 weeks after culture (WAC). In while, the friable callus can be induced at media with plant growth regulator composition treatment R6 (MS + 5 mg l-1 2.4-D + 2 mg l-1 2-iP). The primary somatic embryos can be induced at the treatment KR1E4 (callus from MS + 2.5 mg l-1 2.4-D was moved into MS + 1 mg l-1 2.4-D + 2 mg l-1 2-iP) and the treatment KR6E4 (callus from MS + 5 mg l-1 2.4-D + 2 mg l-1 2-iP was moved into MS + 1 mg l-1 2.4-D + 2 mg l-1 2-iP) in 12 and 16 WAC for each treatment.
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Judul: Embriogenesis Somatik Tidak Langsung Jeruk Keprok Batu 55 (Citrus reticulata L) Hasil Perlakuan Kolkisin
Abstrak: This study was aimed to find the best method of regeneration through somatic embryogenesis Mandarin var Batu 55 best as results of in vitro poliploidization by colchicine. This study consists of: the proliferation of callus, maturation of somatic embryo, germination of somatic embryos, elongation of roots and shoots. The best concentration of phytagel for callus proliferation was 2.5 g/l with MS modified Vitamin MW, and 500 mg/l of malt extract. Maturation of somatic embryos with ABA concentration of 0.5 mg/l on MS basic medium, vitamins MW, 100 mg/l malt extract was the best medium to produce cotyledons. MS modified by the addition of vitamin MS + 2.5 mg/l GA3 + 500 mg/l malt extract was the best medium for the formation of plantlets with a percentage of 43%. Elongation of roots and shoots can use MS medium with vitamins MS + IBA 0.5 mg/l + 500 mg/l malt extract to get the best results.
Keyword: Bogor Agricultural University (IPB), vitamin, protein, plant growth regulator, malt extract

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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