Judul: Inhibisi Ekstrak Etanol Kumis Kucing, Pegagan, Sambiloto, dan Tempuyung terhadap Aktivitas Enzim Pengubah Angiotensin I secara In Vitro
Abstrak: Kumis kucing, pegagan, sambiloto, and tempuyung are medicinal plants potential as antihypertension. Thirty percent ethanol extracts of these plants were investigated towards angiotensin I converting enzyme (ACE) inhibition activity in vitro. The research was conducted at the optimum condition (32 °C of incubation temperature, pH 8.3, and 25 mU/mL of ACE concentration) by using 14, 25, 50, and 100 ppm of single extract concentration, and combined extract with specific compositions. The results were compared with captopril as positive control. Inhibition test of ACE with single extracts showed that 50 ppm of kumis kucing, 100 ppm of pegagan, 100 ppm of sambiloto, and 14 ppm of tempuyung have the highest inhibition of 76.98, 58.69, 53.74, and 62.89%, respectively. Combined extract of kumis kucing, pegagan, and tempuyung of 25:50:7 ratio showed 76.87% inhibition, higher than captopril.
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Judul: Potensi Ekstrak Air dan Etanol Kumis Kucing, Pegagan, Tempuyung, dan Sambiloto sebagai Antihipertensi serta Profil Senyawa Pencirinya.
Abstrak: Kumis kucing, pegagan, tempuyung, and sambiloto are widely used as medicinal plants to treat a variety of diseases, such as hypertension. The objective of this researchs was to determine inhibitory activity of water extracts and 30% ethanol extract of these plants against ACE through in vitro assay. Three extracts with the highest inhibitory activity were formulated by using mixture design and its inhibitory activity against ACE was investigated. The result showed that 30% ethanol extract of pegagan, 30% ethanol extract of kumis kucing, and water extract of kumis kucing showed three of the highest inhibitory activity. Formulation of these extracts in composition of 1/6:1/6:2/3 and concentration of 100 ppm showed inhibition against ACE that slightly lower than inhibition of captopril at 100 ppm. Analysis of marker compounds by using thin layer chromatography showed that sinensetin band detected under UV light at 254 nm and 366 nm. Meanwhile high performance liquid chromatographic analysis showed that the formula contain asiaticoside more than sinensetin.
Keyword: ACE inhibition, antihypertensive, asiaticoside, sinensetin

Judul: Rancang Bangun Sistem Komunikasi Data Lokasi Robot Beroda dan Server Berbasis Wi-Fi Menggunakan Modul ESP8266
Abstrak: Robot beroda merupakan salah satu jenis robot yang banyak dikembangkan. Sistem komunikasi data antara robot dan server banyak diterapkan pada sistem kerjasama antar-robot, ketika robot memerlukan informasi terkait robot lainnya. Penelitian ini mengembangkan sistem komunikasi data nirkabel berbasis Wi-Fi menggunakan modul ESP8266. Data diambil menggunakan modul GPS Ublox Neo 6MV2 yang terhubung dengan satelit lalu dikirim dan disimpan di server untuk kemudian digunakan sesuai kebutuhan. Selanjutnya, pengiriman data dari server ke robot disimulasikan dengan pengiriman balasan oleh server bahwa data sudah diterima. Selanjutnya robot akan merespon balasan dari server tersebut dengan menyalakan light emitting diode (LED) sebagai notifikasi. Hasil dari penelitian ini adalah sistem komunikasi data secara real time dengan menggunakan modul ESP8266 berhasil diimplementasikan dengan interval pengiriman data sebesar 33.29ms dan tingkat keberhasilan pengiriman data keseluruhan sebesar 100%.
Keyword: ESP8266, komunikasi data, real time