This study aims to determine how to identify the types of secondary metabolite compounds contained in durian leaves. The study was conducted by an experimental method by identifying secondary metabolite compounds on durian leaves using phytochemical screening. The sample criteria used were the leaf buds and all the leaf strands (except the leaf bones). The results of the study showed that of the three types of durian leaves namely copper, baskets and Sp A. There are several types of secondary metabolite compounds including alkaloids, steroids, and terpenoids. Phytochemical screening analysis was carried out using thin layer chromatography by showing RF values on three types of durian leaves using methanol and ethyl acetate solvents in a ratio of 3: 1. RF value on copper durian is 0.97, bakul durian is 0.95 and Sp durian. A 0.94.
Penelitian tentang pemodelan 3 Dimensi berbasis data anomali magnetik untuk mengetahui struktur bawah permukaan telah dilakukan di Kabupaten Tanggamus dan Kabupaten Lampung Barat. Data yang digunakan adalah data sekunder yang diambil dengan cara mendigitasi peta anomali magnet total. Pemisahan anomali regional, analisis turunan mendatar pertama (First Horizontal Derivative), dan pemodelan inversi 3D telah dilakukan untuk mencapai tujuan dari penelitian ini. Hasil penelitian menunjukkan bahwa daerah penelitian memiliki potensi panas bumi yang cukup besar di sekitar Kota Agung dan Gunung Sermaun dengan Sebaran nilai anomali magnetik dari -362,7 nT hingga 602,4 nT. Hasil analisis turunan mendatar pertama menunjukkan adanya beberapa patahan yang diduga sebagai jalur bagi fluida panas untuk mengalir ke permukaan. Hasil pemodelan inversi 3D menunjukkan struktur lapisan bawah permukaan Kota Agung bahwa reservoir panas bumi terdapat pada kedalaman 3000 meter, berupa batu pasir, batu lempung, batu lanau, dan batuan yang mengandung mineral non magnetik dengan rentang nilai -0,005 SI hingga -0,002 SI.
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