Judul: Ekstrak Daun Tanaman Lindur (Bruguiera gymnorrhiza) sebagai Antidiare
Abstrak: Bruguiera gymnorrhiza yang dikenal dengan nama lindur merupakan salah satu vegetasi mangrove yang dapat digunakan untuk mengobati diare. Tujuan penelitian ini adalah menentukan rendemen ekstrak kasar, mengidentifikasi komponen aktif dan mengevaluasi aktivitas antibakteri terhadap bakteri penyebab diare pada ekstrak daun lindur hasil ekstraksi tunggal dan ekstraksi bertingkat, serta menentukan kandungan total fenol ekstrak daun lindur hasil ekstraksi tunggal. Rendemen ekstrak etanol daun lindur hasil ekstraksi tunggal sebesar 14,68%. Rendemen ekstrak n-heksana, ekstrak etil asetat dan ekstrak etanol hasil ekstraksi bertingkat masing-masing sebesar 3,56%, 1,93% dan 7,36%. Komponen aktif yang terdapat pada seluruh ekstrak kasar daun lindur adalah steroid dan flavonoid. Ekstrak etanol daun lindur hasil ekstraksi tunggal dan ekstrak etil asetat hasil ekstraksi bertingkat memiliki aktivitas antibakteri yang tertinggi terhadap bakteri Staphylococcus aureus ATCC 6538. Kandungan total fenol ekstrak etanol daun lindur hasil ekstraksi tunggal sebesar 16,59 mgGAE/g ekstrak.
Keyword: antibakteri, B gymnorrhiza, daun, diare, zona bening

Judul: Ekstraksi Komponen Bioaktif dan Aktivitas Antioksidan Daun Lindur (Bruguiera gymnorrhiza)
Abstrak: Lindur are mangrove plants that has been widely used as drug, yet informations on potential drug compounds and antioxidants contained in lindur were still limited. This study aimed to determine of bioactive compound and antioxidant activity of lindur leave. The result showed that lindur fresh leaves had a moisture content 54.91%, ash 4.49%, fat 1.87%, protein 4.45%, and crude fiber 8.67%. Lindur dried leaves had moisture content 9.78%, ash 8.19%, fat 3.90%, protein 9.78%, and crude fiber content 18.05%. The methanol extract had the highest yield (15.79%) compared to the ethyl acetate extract (2.85%), and n-hexane (1.53%). Bioactive compound found in lindur lindur leave extract was flavonoid, phenol hidroquinon, tannin, saponin, dan streoid. Methanol extract showed the highest antioxidant activity with IC50 values of 81.11 ppm, while the n-hexane extract showed the lowest activity with IC50 values of 815.67 ppm. Total phenolic extracts of n-hexane 12.41 mg GAE/g extract, ethyl acetate 97.57 mg GAE/g extract, and methanol 30.07 mg GAE/g extract.
Keyword: leave., Bruguierra gymnorrhiza, bioactive, antioxidant

Judul: Pengaruh Pairing pada Isotop Sn dengan Menggunakan Pemodelan Sembilan Tingkat Energi
Abstrak: Formation of the neutron-rich tin isotopes (Sn isotopes) is the one of the interesting topics in the field of nuclear reaction, especially regarding the stability of the heavy nuclei. Calculations of total energy using the BCS approach using five energy levels can only calculate the total energy up to Sn50132. On the other hand, the experiment continues and has exceeded the formation of isotopes. Therefore, there is need for a new model to accomadate more neutrons. In this research, Sn isotopes is modelled using nine energy levels and constant interaction potential to explain the pairing phenomenon up to Sn50154. However, to obtain more accurate results, other methods to minimize the differences with the experimental results are clearly needed here.
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