Judul: Evaluasi kualitas hasil dan analisis genetik kadar capsaicin dan vitamin C pada cabai
Abstrak: Quality of pepper is related to yield and content of certain metabolite in its fruit. One of the method that is used to estimate genetic parameter is diallel analysis. This study consists of two experiments, i.e. (1) Evaluation of 14 pepper genotypes and their genetic variabilities; (2) Evaluation of F1 generation and genetic parameter estimation of capsaicin and vitamin C content in pepper using diallel analysis. The objectives of the first experiment are to The result shows that 14 obtain the information of yield quality, capsaicin, vitamin A and vitamin C content, and to estimate genetic variability and heritability of several pepper genotypes. Evaluation of 14 pepper genotypes was conducted in Randomized Complete Block Design (RCBD) with 2 replications. Each unit of experiment consists of 20 plants with 6 sample plants. In this experiment, the observed variables are qualitative and quantitative characters. The qualitative character i.e. fruit color was observed based on Descriptors for Capsicum from IPGRI, while quantitative characters i.e., fruit length, thickness of fruit skin, weight per fruit, and weight of fruit per plant. Measurement of capsaicin, vitamin A, and vitamin C content was performed using High Performance Liquid Chromatography (HPLC) technique.
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Judul: Inheritance Analysis and Combining Ability of Capsaicin Content and The Other Quantitative Characters in Chili (Capsicum annuum L.)
Abstrak: Salah satu tanaman hortikultura yang dibudidayakan dan memiliki peranan yang penting dalam kehidupan masyarakat yaitu tanaman cabai (Capsicum annuum L.). Berbagai persoalan muncul dalam memenuhi besarnya kebutuhan tersebut, diantaranya disebabkan luas lahan yang semakin sempit akibat banyaknya alih fungsi lahan sehingga berpengaruh pada produktivitas tanaman cabai. Produktivitas tanaman cabai dapat ditingkatkan dengan kegiatan pemuliaan konvensional hibridisasi buatan yang menghasilkan varietas hibrida. Metode yang tepat untuk memperoleh mekanisme gen yang terlibat pada awal generasi yaitu metode analisis dialel Tujuan penelitian ini adalah untuk memperoleh informasi pewarisan sifat kandungan capsaicin dan karakter kuantitatif cabai, memperoleh informasi daya gabung umum dan daya gabung khusus tanaman cabai hasil persilangan melalui metode persilangan dialel, dan memperoleh informasi keragaan kandungan capsaicin dan daya hasil sebagai calon varietas unggul hibrida. Penelitian ini terdiri dari tiga percobaan yaitu studi pewarisan sifat kandungan capsaicin dan karakter kuantitatif, uji daya gabung umum dan daya gabung khusus, dan keragaan calon varietas unggul hibrida. Percobaan pertama menunjukkan bahwa terdapat aksi gen epistasis yang berperan dalam penampilan karakter yang dihasilkan dilihat dari nilai b (Wr, Vr). Kandungan capsaicin dalam penelitian ini dikendalikan oleh satu kelompok gen. Karakter kandungan capsaicin, diameter batang, panjang buah, diameter buah, jumlah buah pertanaman, dan bobot buah pertanaman menunjukkan bahwa peran aksi gen aditif mempengaruhi lebih besar. Percobaan kedua menghasilkan hibrida C5 x F074 yang memiliki nilai daya gabung khusus tertinggi pada karakter bobot buah pertanaman. Nilai daya gabung khusus tertinggi karakter kandungan capsaicin ditemukan pada kombinasi Bara x F9160291, Giant x Yuni, dan F074 x Yuni. Percobaan ketiga menunjukkan bahwa sebagian besar hibrida yang berbeda nyata dengan varietas pembanding pada karakter buah dan capsaicin, namun sebagian besar lainnya tidak berbeda nyata pada karakter pertumbuhan tanaman. Hibrida yang berpotensi untuk dikembangkan lebih lanjut antara lain F074 x C5, Bara x F9160291, dan Yuni x F074.
Keyword: combining ability, performance, study of inheritance, capsaicin content

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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