Judul: Karakterisasi Nanopropolis Lebah Trigona spp. sebagai Penghambat Enzim Alfa-Glukosidase
Abstrak: Propolis merupakan resin produk sarang lebah yang digunakan untuk meningkatkan kesehatan dan membantu mencegah berbagai macam penyakit seperti inflamasi, sakit jantung, diabetes, dan kanker. Penelitian ini bertujuan menentukan aktivitas penghambatan enzim α-glukosidase yang optimum dengan membandingkan ekstrak etanol propolis dan nanopropolis. Metode yang dilakukan yaitu ekstraksi propolis, pengujian kualitatif komponen kimia, pembuatan nanopropolis, karakterisasi nanopropolis, dan uji penghambatan enzim α-glukosidase. Proses ekstraksi propolis menghasilkan rendemen sebesar 16.74%. Ekstrak etanol propolis mengandung senyawa flavonoid, tanin, dan saponin. Setelah dilakukan ultrasonikasi selama 10, 20, dan 60 menit menghasilkan nanopartikel dengan ukuran sebesar 427.2 nm, 258.7 nm, dan 145.3 nm. Dilihat dari hasil XRD dan FTIR, β-siklodekstrin dapat menyalut keberadaan ekstrak etanol propolis. Nanopropolis dengan waktu sonikasi 20 menit memiliki kemampuan menghambat kerja enzim α-glukosidase. Kemampuan menghambat enzim α-glukosidase pada nanopropolis memiliki potensi yang bermanfaat dalam pencegahan dan perlindungan terhadap penyakit diabetes melitus 2.
Keyword: α-glukosidase, nanopropolis, propolis

Judul: Ekstraksi Propolis dan Sintesis Nanopropolis Lebah Madu Trigona spp
Abstrak: Propolis is a resin adhesive material collected from worker bees from the buds, bark, and other plant parts. Propolis have many benefits are as antibacterial, aniviral, and anticancer. The purpose of this study is to search method of extraction and nanopropolis synthesis that will produce the high effectiveness, knowing antibacterial activity and knowing value of optimization nanopropolis as antibacterial against E. coli . Propolis extracted uses the method maceration with modification MAE (microwave-assisted extraction). Futhermore synthesis of nanopropolis use Aimi methode modified by high speed homogenization, hopefully nanopropolis more effective than propolis as antibacterial. The yield of propolis extract is 10.93%. The values of PSA from nanopropolis are 176.30 nm, 205.10 nm, and 295.80 nm. Result activity antibacterial nanopropolis with disc diffusion methode againts E. coli indicated nanopropolis does not have antibacterial, because nanopropolis does not produce cleare zones in disc paper area. The result from ampicilin is does not have antibacterial againts E. coli.
Keyword: antibacterial, nanopropolis, propolis.

Judul: Implementasi Space Time Composite (STC) Data Model Menggunakan Model Data Relasional
Abstrak: The data model is a concept that describes the data stored in the database and the relationship between the data to the user in logic. Development of data models is very important in the design of the database as the basis of the stage of database design to be made. This study aims to apply the concept of Space Time Composite (STC) on the Model Data storage vector data types that can store enough information and describes the process of drafting objects and objects spatiotemporal evolution over time. From the results of the test queries on the data model that have been created, queries in a system are acquired that can help display the information preparation of objects from time to time and know the history of the object polygon and arc that has undergone changes in topology.
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