Judul: Distribusi Dan Kelimpahan Nudibranchia (Moluska) Di Teluk Jakarta.
Abstrak: Nudibranch is a group of marine gastropod molluscs which shed their shell after their larvae stage. Nudibranchia is benthic animals which consume algae, sponges, hard and soft corals, bryozoans, and hydroids . Nudibranch occur in coral reefs with high density. However, distribution and abundance of nudibranchia in Jakarta Bay are lack known. This study aimed to measure the density and abundance of Nudibranch. Therefore, the study was conducted on September 6 to 8, 2013 at 10 sites on the Jakarta Bay. Distribution and abundance data were collected by using the belt transect method (Belt Transect) and Line Intercept Transect (LIT). A total of 6 family of 18 species and 97 individuals Nudibranch was observed in the study sites. The highest Nudibranch density was found in the Kayangan Island (51 individu/500 m²) and the lowest Nudibranch density was found in the Untung Jawa island (0 individu/500 m²).
Keyword: Nudibranch., Jakarta Bay, density, abundance

Judul: Identifikasi Molekuler, Keragaman Genetik Dan Karakteristik Habitat Siput Laut (Nudibranchia) Dari Beberapa Populasi Di Indonesia
Abstrak: Nudibranchia berasal dari “Nudus” berarti telanjang dan “Branchia” yang berarti insang. Spesies Nudibranchia yang telah teridentifikasi di kawasan perairan Indonesia sebanyak 59 spesies dan terdiri dari 15 famili. Namun, eksplorasi di studi tentang jenis-jenis nudibranch di Indonesia masih jarang dilakukan. Tujuan dari penelitian ini adalah untuk mengidentifikasi serta menganalisis keragaman genetik nudibranch di Indonesia dengan menggunakan metode molekuler, menganalisis karakteristik habitat dan hubungannya dengan spesies nudibranch di Indonesia. Metode yang digunakan adalah DNA Barcoding dengan marka mitokondria lokus Cytochrom oxidase 1 (CO1). Hasil BLAST yang diinterpretasikan dalam pohon filogenetik menghasilkan 14 spesies nudibranch dari 30 sampel dengan tujuh lokasi di Indonesia. Keragaman haplotipe untuk setiap spesies nudibranch berbeda-beda dengan kategori rendah hingga sedang serta memiliki nilai keragaman genetik 0 - 0.5. Nilai keragaman genetik rendah terdapat pada spesies Phyllidiella pustulosa di Gosong pramuka, Phyllidiella pustulosa di Papua, Phyllidia ocellata di Papua, Phyllidiella pustulosa, Phyllidia ocellata, Chromodoris annae and Elysia cf marginata di Papua, Phyllidia elegans dan Phyllidia coelestis di Luwuk, Phyllidia varicosa di Nusa Penida, Taringa caudata di Pulau Dapur, Doriprismatica atromarginata, Mexichromis multituberculata, Risbecia tyroni, Chromodoris striatella di Teluk Jakarta. Nilai keragaman genetik sedang terdapat pada Phyllidiella pustulosa di Luwuk, Nusa Penida dan Biak, Chromodoris magnifica di Nusa Penida, serta Plakobranchus sp. di Papua. Hubungan karakteristik habitat dengan spesies nudibranch didapatkan melalui Correspondence Analysis (CA) yang menjelaskan spesies nudibranch yang termasuk kedalam famili Phyllidiidae habitatnya adalah terumbu karang dan spesies dalam famili Chromodorididae banyak mendiami rubbel sebagai habitatnya.
Keyword: Correspondence Analysis (CA), DNA Barcoding, hubungan karakteristik habitat dengan spesies, keragaman genetik, Nudibranch

Judul: Sintesis Flavonol melalui 2’-Hidroksikalkon
Abstrak: Flavonol is a class of flavonoids commonly found in fruits and vegetables. Flavonol is very useful, especially in food sector and health. In this study, flavonol unsubstituted was successfully synthesized from an intermediate material 2’-hydroxychalcone. The 2’-hydroxychalcone was synthesized by Claisen-Schmidt condensation method between o-hydroxyacetophenone and benzaldehyde using 4 different catalysts, namely KOH 60%, solid pellet of KOH-grinding technique, BF3-Et2O, and NaH in DMF. The KOH 60% was the best catalyst, giving the highest yield (57%). Afterward, the flavonol was synthesized in 1-stage oxidation cyclization of o-hydroxyacetophenone using Algar-Flynn-Oyamada (AFO) reaction, giving 76%. The flavonol total yield from 2’-hydroxychalcone was 43%. All synthesized products were characterized by their melting points and their spectra. The success of the synthesis flavonol opens the way to synthesis of useful flavonol derivatives such as quercetin and kaempferol.
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