Judul: Korelasi kadar kurkuminoid dan aktivitas antioksidan ekstrak kunyit (Curcuma longa Linn) melalui modifikasi ekstraksi
Abstrak: Kunyit (Curcuma longa Linn) diketahui mempunyai aktivitas biologis sebagai antioksidan yang berasal dari kandungan kurkuminoidnya. Aktivitas antioksidan dan kadar kurkuminoid kunyit dipengaruhi oleh proses ekstraksi. Penelitian ini bertujuan membandingkan kadar kurkuminoid ekstrak kunyit segar dan ekstrak simplisia berdasarkan teknik ekstraksi maserasi konvensional dan modifikasi ekstraksi secara sonikasi dan gelombang mikro dengan menggunakan pelarut etanol 70%. Hasil penelitian menunjukkan bahwa rendemen ekstrak simplisia sebesar 18.77-30.39%, sedangkan rendemen ekstrak segar yaitu 26.17- 43.04%. Kedua jenis ekstrak memiliki rendemen tertinggi pada perlakuan maserasi. Kadar kurkuminoid ekstrak simplisia yang dihasilkan berkisar antara 7.17-17.91(%b/b), sedangkan ekstrak segarnya berkisar antara 1.89-2.45(%b/b). Adapun nilai IC50 ekstrak simplisia berkisar antara 35.44-61.53ppm, sedangkan ekstrak segarnya berkisar antara 69.24-215.32ppm. Kadar kurkuminoid dan aktivitas antioksidan tertinggi terdapat pada perlakuan ekstrak kunyit simplisia melalui sonikasi. Pola kromatografi lapis tipis ekstrak dengan eluen kloroform:diklorometan (32.5:67.5 v/v) menunjukkan bahwa ekstrak terpisah menjadi 4 senyawa, dengan 3 senyawa diidentifikasi sebagai kurkumin, demetoksikurkumin, dan bisdemetoksikurkumin. Kadar kurkuminoid ekstrak kunyit segar dan ekstrak simplisia melalui maserasi serta modifikasi ekstraksi berkorelasi positif terhadap aktivitas antioksidannya.
Keyword: Turmeric, Modification extraction, Curcuminoid, Antioxidant

Judul: Meta-analysis of Solvent Effectiveness, Particle Size, and Extraction Method of Curcumin Levels on Curcuma Rhizome (Curcuma xanthorrhiza)
Abstrak: Temulawak merupakan tanaman herbal yang memiliki berbagai potensi farmakologi akibat kandungan senyawa aktif yang dimilikinya, salah satunya yaitu kurkumin. Penelitian terkait optimasi proses ekstraksi temulawak agar menghasilkan ekstrak senyawa aktif kurkumin yang tinggi telah banyak dilakukan, namun hasil yang diperoleh dari berbagai penelitian bervariasi sehingga diperlukan teknik analisis dan penarikan kesimpulan dari data yang ada untuk menjawab perbedaan tersebut. Penelitian bertujuan menentukan efektivitas penggunaan pelarut, ukuran partikel, dan metode ekstraksi terhadap kadar kurkumin yang diperoleh selama ekstraksi. Kadar kurkumin tertinggi pada ekstraksi temulawak diperoleh pada penggunaan pelarut n-heksana, ukuran partikel 100 mesh, dan metode sokhlet. Nilai efektivitas pemilihan pelarut (2,6%) tidak menunjukkan pengaruh yang signifikan terhadap kadar kurkumin ekstrak temulawak. Efektivitas ukuran partikel berpengaruh sebesar 65,9% terhadap kadar kurkumin ekstrak temulawak. Semakin kecil ukuran partikel simplisia yang digunakan maka semakin tinggi kadar kurkumin ekstrak temulawak yang diperoleh. Efektivitas metode ekstraksi berpengaruh sebesar 86% terhadap kadar kurkumin ekstrak temulawak. Semakin banyak metode yang digunakan maka semakin sedikit kadar kurkumin ekstrak temulawak yang diperoleh. Kata kunci : kurkumin, meta-analisis, metode ekstraksi, pelarut, ukuran partikel., Curcuma is an herbal plant that has various pharmacological potentials due to its active compound content, one of which is curcumin. Research related to the optimization of the curcuma extraction process in order to produce extracts of high bioactive curcumin content has been carried out, but the results obtained from various studies vary so that analysis techniques and drawing conclusions from existing data are needed to answer these differences. This study aims to determine the effectiveness of solvent selection, particle size, and extraction method on curcumin levels obtained during extraction. The highest curcumin content in curcuma extraction was obtained using n-hexane solvent, 100 mesh particle size, and the soxhlet method. The value of the effectiveness of selecting solvents (2.6%) did not show a significant effect on curcumin levels of curcuma extract. The effectiveness of the particle size had an effect of 65.9% on the curcumin content of ginger extract. The smaller of simplicia particle size used, the more curcumin content of curcuma extract obtained. The effectiveness of the extraction method has an effect of 86% on the curcumin content of ginger extract. The more methods used, the less curcumin content of curcuma extract obtained.
Keyword: meta-analysis, curcumin, particle size, extraction method, solvent

Judul: Rancang Bangun Jaringan Peer-to-Peer Webcam dengan Menggunakan Protokol JXTA
Abstrak: Internet is a media for exchange of information and data. Network used on the internet today still implementing client-server network model. Clients need the information must related to the server and request the information needed. System established client-server network is a centralized system and can potentially commercial. If the server was down, the information requested by the client can’t be given and the whole network will be disrupted. Peer-to-peer network is set up to reduce the problem of client-server. Peer-to-peer will not be affected to the problems that occur in each host. If one host to crash or be unable to connect, the network was still able to run. In this research we develop an application using JXTA protocol as a framework for peer-to-peer and API JMF as an additional feature integrated on a JXTA application. API JMF is used to access webcam and produces images or videos. Video or image files generated by the API JMF can be distributed directly into the peer-to-peer network which has been formed. Other connected peers can directly search and download the video files or images. Downloaded files will be directly stored into a local folder on each peer. Files downloaded can be directly redistributed by every peer. If one peer dies, the other peer can share the data from the dead peer after the file is downloaded from the source peer.
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