Judul: Profil Senyawa Bioaktif Ekstrak Etanol Tanaman Brokoli (Brassica oleracea var. Italica) dengan Pemberian Pupuk Biokonversi Maggot Black Soldier Fly.
Abstrak: Brokoli merupakan tanaman hortikultura yang ditanam di kawasan dataran tinggi, salah satunya di Desa Sindangjaya Kecamatan Cipanas Kabupaten Cianjur. Penelitian bertujuan menganalisis pengaruh aplikasi pupuk kompos hasil biokonversi Black Soldier Fly (BSF) terhadap tinggi tanaman, jumlah daun, bobot basah, bobot kering serta persentase berbunga dan kandungan senyawa bioaktif ekstrak etanol tanaman brokoli. Penanaman brokoli dilakukan selama 14 minggu dengan 3 macam perlakuan yaitu kontrol (P1), penambahan pupuk kandang (P2) dan penambahan pupuk biokonversi maggot (P3). Setiap perlakuan dilakuan ulangan sebanyak 3 kali yang di dalamnya terdapat 10 tanaman dan dilakukan dalam 3 kelompok sehingga terdapat 270 tanaman brokoli yang ditanam. Penambahan pupuk biokonversi maggot mampu meningkatkan produksi tanaman sesuai dengan hasil penelitian yang berpengaruh nyata pada tinggi tanaman, jumlah daun, bobot basah dan kering serta persentase berbunga. Metode LC-MS/MS yang digunakan untuk identifikasi senyawa aktif pada ekstrak etanol 80% brokoli menunjukkan terdapat 58 senyawa bioaktif yang masuk ke dalam golongan metabolit sekunder, asam amino, lipid, amina, asam karboksilat, purin, pirimidin dan produk turunan klorofil.
Keyword: broccoli, LC-MS/MS, secondary metabolites, maggot bioconversion fertilizers

Judul: Biokonversi Limbah Organik Pasar Agrobis Magetan Menjadi Protein Pakan Ternak Menggunakan Larva Black Soldier Fly
Abstrak: Salah satu pengolahan limbah organik yang ramah lingkungan adalah biokonversi limbah organik menggunakan larva black soldier fly (BSF). Penelitian ini bertujuan menganalisis karakteristik dekomposisi limbah organik Pasar Agrobis dengan larva BSF, serta mengaplikasikan dan mengkaji mutu pakan pengolahan larva BSF sebagai alternatif substitusi protein bagi pakan ternak. Penelitian dilaksanakan pada Maret-April 2022 di Kabupaten Magetan, Jawa Timur. Karakteristik dekomposisi limbah padat organik menggunakan larva BSF diidentifikasi dengan waste reduction index (WRI), fresh matter consumption rate (FMCR), dry matter reduction (DMR), dan dry matter consumption rate (DMCR). Nilai WRI dan FMCR untuk limbah organik Pasar Agrobis selama 15 hari, yaitu 3,2%/hari dan 32,1 mg/larva/hari. Nilai persen DMR sebesar 84,4% dan nilai DMCR sebesar 27,1 mg/larva/hari. Aplikasi larva BSF sebagai substitusi protein pakan memenuhi persyaratan mutu pakan berdasarkan SNI 8173:2015, kecuali lemak kasar dan serat kasar. Pertambahan bobot ayam broiler umur 8-21 hari (starter) dan 21 hari ke atas (finisher) selama 12 hari berbeda nyata terhadap pakan komersial (p>0,05) dengan nilai rasio konversi pakan (RKP) lebih rendah., One of the environmentally friendly organic waste treatments is the bioconversion of organic waste using black soldier fly (BSF) larvae. This study aims to analyze the decomposition characteristics of organic waste in the Agrobis Market with BSF larvae, apply, and examine the quality of animal feed from BSF larvae as an alternative to protein substitution. The study was conducted in March-April 2022 in Magetan Regency, East Java. Characteristics of the decomposition of organic waste using BSF larvae were identified with waste reduction index (WRI), fresh matter consumption rate (FMCR), dry matter reduction (DMR), and dry matter consumption rate (DMCR). The value of WRI and FMCR organic waste for 15 days were 3,2%/day and 32,1 mg/larva/day. The percent DMR was 84,4% and DMCR was 27,1 mg/larva/day. The application of BSF larvae as protein substitution meets the animal feed quality based on SNI 8173:2015, except for crude lipid and fiber. The growth gain of broiler aged 8-21 days (starter) and above 21 days (finisher) for 12 days obtained significantly different against commercial feed (p>0.05) with a lower food convertion ratio (FCR) value.
Keyword: Agrobis Market, bioconversion, black soldier fly, broiler

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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