Judul: Pengaruh komposisi media dalam pertumbuhan protocorm like bodies, planlet, dan aklimatisasi phalaenopsis amabilis
Abstrak: Phalaenopsis amabilis, known as ‘anggrek bulan’, is one of the most popular kind of orchids and was inaugurated as one of the national flower as 'Puspa Pesona'. The purpose of this study was to determine and study the effects of various tissue culture media composition on Protocorm Like Bodies (PLBs) multiplication, growth of plantlets, and acclimatization of Phalaenopsis amabilis. Basic medium used was a half strengh of Murashige and Skoog (1/2MS) and Hyponex (Hyp) with additional coconut water (CW), benzylaminopurine (BAP), and chitosan. In PLBs multiplication experiments, ½ MS + 15% CW medium produced the highest percentage of survival rate. Treatment with ½ MS + 15% CW medium and Hyp. 2 g/l + 15% CW + 2.5 ppm chitosan medium gave the best effect on the fresh weight of plantlets. The composition of the culture medium significantly affect the fresh weight and length of root on 8-WAP(week after planting) in the acclimatization stage.
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Judul: Pertumbuhan Protocorm Like Bodies (Plb) Dua Populasi Hasil Persilangan Anggrek Phalaenopsis pada Beberapa Komposisi Media
Abstrak: In vitro propagation of orchids had shortened the time required to produce plants in large quantities. The objective of this research was to determine the effect of medium composition on the growth of protocorm like bodies (Plb) of two populations of Phalaenopsis hybrid. Research laid out in completely randomized design with two factors, namely the Phalaenopsis hybrid populations and medium composition. The first hybrid of population was generated from a crossing between the white standard and the pink standard of Phalaenopsis hybrid accession and the second hybrid was the reciprocal of the first crossing. Seeds were germinated on MS 1/2 to produce Plb, then the Plb subsequently cultured in four media composition, i.e MS 1/2 , MS 1/2 + coconut water 150 ml l-1, complex fertilizer Hyponex (2 g l-1), and Hyponex (2 g l-1) + coconut water 150 ml l-1. The results showed that the increase of Plb was significantly influenced by population, medium composition, and the interaction between the two factors. Population 1 showed better growth (average 5.4 Plb per 16 weeks) compared with the population 2 (average 2.2 Plb per 16 weeks). The best medium for the growth of Plb into plantlets in both populations is Hyponex (2 g l-1) or Hyponex (2 g l-1) + coconut water 150 ml l-1.
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Judul: igenvalues and Eigenvectors of Tridiagonal Matrix with Non Constant and Recurrent Diagonal Entries.
Abstrak: Matriks tridiagonal adalah suatu matriks yang mempunyai entri-entri bernilai nol kecuali pada diagonal utama, di bawah diagonal utama (subdiagonal) dan di atas diagonal utama (superdiagonal). Entri pada diagonal utama tidak konstan dan berulang. Setiap entri pada matriks tridiagonal ini adalah bilangan kompleks. Dalam karya ilmiah ini, akan dibuktikan 3 teorema untuk menentukan nilai eigen dengan 2 kasus dan 1 teorema untuk menentukan vektor eigen. Teorema pertama menentukan polinomial karakteristik dari matriks tridiagonal. Polinomial karakteristik dari matriks tridiagonal tersebut digunakan untuk menentukan nilai eigen pada teorema kedua dan ketiga serta menentukan vektor eigen pada teorema keempat
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