Judul: Multiplication of tin plants (Ficus carica) Blue Giant variety using a combination of BAP and IAA in in vitro
Abstrak: Tumbuhnya kesadaran masyarakat akan manfaat tanaman Tin untuk kesehatan menyebabkan permintaan produk dan bibit tanaman Tin semakin meningkat. Penelitian ini bertujuan mengetahui respon terhadap penggunaan ZPT jenis BAP (6-Benzylamino Purin) dengan IAA (Indole Acetic Acid) terhadap pertumbuhan dan multiplikasi tanaman tin varietas Blue Giant secara in vitro. Penelitian dilakukan di Laboratorium Kultur Jaringan IPB University pada bulan Oktober 2022 hingga bulan Mei 2023. Rancangan percobaan yang digunakan adalah faktorial Rancangan Kelompok Lengkap Teracak (RKLT) dua faktor yaitu BAP (0; 0,5; 1; 1,5) mg L-1 dengan kombinasi IAA (0 ; 0,25; 0,5) mg L-1. Kombinasi BAP 0,5 mg L-1 dengan IAA 0,25 mg L-1 menghasilkan eksplan tertinggi yaitu 3,60 cm pada 8 MST. BAP tunggal yaitu 1,5 mg L-1 menghasilkan jumlah tunas terbanyak yaitu 1,85 tunas. Penggunaan media arang sekam steril dengan teknik penyungkupan pada 4 MST ditahap aklimatisasi menghasilkan rata-rata persentase hidup 91,67%., Public awareness in the health benefits of fig plants has led to an increasing demand for fig products and seeds. This study aims to determine the response to the use of growth regulator type BAP and IAA on the growth and multiplication of Blue Giant fig varieties in vitro. The study was conducted at the IPB University, Tissue Culture Laboratory, from October 2022 to May 2023. The experimental design used was a factorial Randomized Complete Group Design (RCGD) with two factors, namely BAP (6-Benzylamino Purin) (0; 0.5; 1; 1 .5) mg L-1 with a combination of IAA (Indole Acetic Acid) (0 ; 0.25; 0.5) mg L-1. The combination of BAP 0.5 mg L-1 with IAA 0.25 m .L-1 produced the highest explant, namely 3.60 cm at 8 WAP. BAP 1.5 mg L-1, produced the highest number of shoots, namely 1.85 shoots. The use of sterile charcoal media with the cover technique at 4 WAP acclimatization resulted in an average survival rate of 91.67%.
Keyword: acclimatization, charcoal, growth, growth regulator, number of shoots

Judul: Performance of Mother Plant, Seedling, and Nursery Transplant on Several Accession Fig (Ficus carica L.)
Abstrak: Tin (Ficus carica L.) merupakan tanaman famili Moracea dari daerah beriklim subtropis. Tanaman tin dapat dibudidayakan secara vegetatif melalui setek batang. Tanaman tin dari setiap negara memiliki perbedaan karakteristik, namun sayangnya masih sedikit penelitian mengenai ragam jenis tanaman tin. Penelitian mengenai media tanam yang tepat dalam budidaya tin juga masih sulit ditemukan, oleh karena itu penelitian terkait respon pertumbuhan aksesi tin pada tahapan budidaya dengan percobaan berbagai media tanam ini perlu dilakukan. Penelitian ini terbagi menjadi tiga bagian, yaitu penelitian pada tanaman induk, hasil persemaian dan pembibitan. Tanaman induk dan pembibitan menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) faktor tunggal, yaitu aksesi. Persemaian menggunakan RKLT split plot dengan perlakuan media tanam dan aksesi. Hasil analisis ragam menunjukkan bahwa tidak ada keragaman pada peubah panjang cabang, jumlah daun, dan panjang buah pada tanaman induk. Hasil analisis ragam pada persemaian menghasilkan interaksi antara media tanam dan aksesi yang berpengaruh sangat nyata pada peubah jumlah tunas, panjang tunas, dan jumlah daun. Aksesi LSU Gold dan Red Yerussalem lebih baik di tanam pada media campuran arang sekam dan tanah, sedangkan aksesi Brown Turkey lebih baik di tanam pada media dengan komposisi tanah, sekam bakar, bakteri penyubur, dan pupuk kandang kambing. Aksesi Sals Corleone, Big Giant dan JH Adriatic menghasilkan pertumbuhan yang sama baiknya pada kedua media tanam. Persentase tumbuh tertinggi pada media campuran arang sekam dan tanah saat 6 MSS ialah aksesi Red Yerussalem (70%), sedangkan persentase tumbuh tertinggi pada media dengan komposisi tanah, sekam bakar, bakteri penyubur, dan pupuk kandang kambing ialah aksesi Big Giant (70%). Tidak ada keragaman yang nyata dalam panjang tunas pada pembibitan. Kata kunci: aksesi, media tanam, setek, tin, Fig (Ficus carica L.) is a Moracea family plant native to subtropical climates. Fig can be propagated with vegetative method through stem cuttings. Fig plants from each country have different characteristics, unfortunately there are not many research about fig plants varieties. Research on the suitable planting media in fig cultivation is also difficult to find, therefore research that related to growth response of fig accession at the stage of cultivation with the experiment of various planting media need to be done. This research is divided into three parts, namely mother plant, seedbed, and nurseries. Mother plant and nurseries used a single factor Randomized Complete Group Design (RKLT), namely accession. The nursery used a split plot RKLT with the planting media and accession treatment. The results of the variety analysis showed that there was no variation in the variables of branch length, number of foliages, and fruit length on the mother plant. The results of the variety analysis on seedbed showed that the interaction between planting media and accession had a real effect on the variable number of shoots, the length of shoots, and the variable number of foliages. LSU Gold and Red Yerussalem accession were better planted on the mixed media of charcoal husks and soil, while Brown Turkey accession is better on the planting media with composition soil, chaff, fertilizing bacteria, and goat manure. Sals Corleone, Big Giant, and JH Adriatic accession generate similar growth on both planting media. The highest growth
Keyword: accession, cutting, fig, planting media

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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