Judul: Physically induced mutation of carnation (Dianthus caryphyllus Linn.) and the stability test of vegetatively propagated mutants
Abstrak: Lack of novel variety of carnation increase the demand of imported seeds. Therefore, breeding program to broaden the genetic variability of carnation is very important, such as through induced mutation treatment. Knowledge on physically induced mutation breeding on carnation will help mutation breeders of ornamental plant to determine the range's dose of gamma rays, and to know the pattern of flower colour change of carnation in addition, the result of this research enrichs the germplasm of carmation and complete it's collection for further breeding activities.
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Judul: Morphology and Stomata Performance of Lipstick Flower (Aeschynanthus Soedjana Kassan) After Polyploidy Induction with Colchicine and Oryzalin
Abstrak: Tanaman hias memiliki karakter yang bervariasi. Keragamannya dapat ditingkatkan dengan induksi mutasi. Salah satu perlakuan mutasi induksi adalahdengan pembentukan tanaman poliploid sehingga dapat menghasilkan satuindividu yang memiliki set kromosom lebih dari dua pasang pada sel somatiknya. Penelitian ini menggunakan mutagen kolcisin dan orizalin dengan masing-masing tiga konsentrasi. Bahan tanam yang digunakan yaitu stek batang dengan Rancangan Acak Lengkap (RAL) satu faktor. Percobaan menggunakan tiga kali ulangan pada tujuh perlakuan yaitu kontrol, kolcisin 0,05%, 0,10%, 0,15%, serta orizalin 0,005%, 0,010%, dan 0,015%. Hasil penelitian menunjukkan bahwa perlakuan kolcisin dan orizalin berpengaruh nyata terhadap karakter morfologi tanaman bunga lipstik diantaranya panjang tunas total, panjang ruas, pertambahan panjang daun, lebar daun, dan tebal daun. Karakter anatomi stomata yang dilakukan tidak menunjukkan perbedaan yang nyata. Tanaman dengan perlakuan mutagen memiliki frekuensi stomata yang lebih banyak daripada kontrol., Ornamental plants have varied characters. Diversity can be increased by induction of mutations. One treatment for induced mutations is to form polyploid plants so that they can produce one individual that has more than two pairs of chromosome sets in its somatic cells. This research used the mutagens colchicine and oryzalin at three concentrations each. The planting material used was stemcuttings with a one-factor Completely Randomized Design (CRD). The experiment used three replications in seven treatments, namely control, colchicine 0,05%, 0,10%, 0,15%, and oryzalin 0,005%, 0,010%, and 0,015%. The results of the research showed that colchicine and orizalyn treatments had a significant effect on the morphological characters of lipstick flower plants, including total shoot length, internode length, increase in leaf length, leaf width and leaf thickness. The anatomical characteristics of the stomata did not show any real differences. Mutagen-treated plants had a higher frequency of stomata than controls.
Keyword: mutagen, mutation, ornamental plants

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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