Judul: Desain Kapal Penangkap Ikan Berukuran ≤ 10 GT Berdasarkan Kearifan Lokal Nelayan Di Pangkalan Pendaratan Ikan Ujong Baroeh Kabupaten Aceh Barat
Abstrak: Ships are an important means for fishing business. All fishing activities are carried out on fishing vessels such as operating and storing fishing gear, storing caught fish, storing fishing supplies and resting places for ship crews. The shape and size of fishing vessels in Indonesia are very diverse. Depending on the habits of fishermen, the area where the boat is built and operated, and the fishing gear used. In West Aceh Regency, there are fishing boats of various sizes and the fishing gear used is nets and fishing rods. This study aims to identify the shape and calculate the stability of fishing vessels measuring less than or equal to 10 gross tonnage (GT) at the Fish Landing Base (PPI) Ujong Baroh, West Aceh Regency. This identification is intended as a basic reference in formulating local wisdom boat designs for fishermen in West Aceh Regency. The existence of this reference ship design can help the government and other parties in providing aid vessels for fishermen in West Aceh Regency that are in accordance with the needs and habits of the fishermen themselves. The method used is direct observation and measurement of fishing vessels. Data analysis was carried out descriptively numerically and qualitatively. The sample vessels were set as 51 units of fishing vessels with a size of 1-5 GT and 31 units of vessels with a size of 6-10 GT. It was identified that fishing boats in Aceh Barat Regency have a transom shape lengthwise, while transversely there are two forms of ship rafters, namely round bottom and round flat bottom. The main dimension ratios of fishing boats owned by fishermen at PPI Ujong Baroh belong to the static gear groups. The ratio of the main dimensions of the ship group of 6- 10 GT is smaller than the group of ships with a size of 1-5 GT. All fishing boats in West Aceh have the shape of a raked bow bow and a cruiser stern. The steering wheel used is an iron stick steering wheel with a single steering leaf made of iron flats. The stability of the ship owned by the PPI Ujong Baroh fisherman has a positive value, meaning that the ship can return to its original position after an oleg occurs. The parameter values for the stability of fishing vessels at PPI Ujong Baroh have met the criteria suggested by the International Maritime Organization (IMO)., Kapal merupakan sarana penting bagi usaha penangkapan ikan. Semua aktivitas nelayan dilakukan di atas kapal penangkap ikan seperti mengoperasikan dan menyimpan alat tangkap, menyimpan ikan hasil tangkapan, menyimpan perbekalan melaut dan tempat istirahat awak kapal. Bentuk dan ukuran kapal penangkap ikan di Indonesia sangat beragam. Tergantung dengan kebiasaan nelayan, daerah dimana kapal tersebut dibuat dan dioperasikan, serta alat tangkap yang digunakan. Di Kabupaten Aceh Barat terdapat kapal penangkap ikan dengan berbagai ukuran dan alat tangkap yang digunakan berupa jaring dan pancing. Penelitian ini bertujuan untuk mengidentifikasi bentuk dan menghitung stabilitas kapal penangkap ikan berukuran 10 GT di Pangkalan Pendaratan Ikan (PPI) Ujong Baroh Kabupaten Aceh Barat. Identifikasi ini dimaksudkan sebagai dasar acuan dalam merumuskan
Keyword: Kapal Penangkap Ikan, Kabupaten Aceh Barat, Rasio Dimensi

Judul: The Suitability of The Shape of The Rafters for The Operation of Traps and Gillnets in Central Tapanuli Regency
Abstrak: Statistik Perikanan Pelabuhan Perikanan Nusantara (PPN) Sibolga 2016 hingga 2020 menunjukkan bahwa kunjungan kapal berukuran 11-30 GT didominasi oleh kapal liftnet, gillnet dan bubu yang tergolong dalam kelompok kapal static gear. Kelompok kapal static gear merupakan kelompok kapal yang memprioritaskan performa stabilitas, sehingga kelompok ini membutuhkan kapal dengan kasko yang memiliki stabilitas yang baik. Namun, kapal yang digunakan oleh nelayan Tapanuli Tengah berupa kapal dengan bentuk kasko round bottom. Hal ini dapat menjadi masalah, sebab kapal dengan bentuk kasko round bottom dapat memiliki kestabilan yang buruk. Tujuan penelitian ini untuk menganalisis kualitas stabilitas kapal yang dibangun di Tapanuli Tengah saat mengoperasikan alat tangkap bubu dan gillnet. Penelitian dilakukan dengan cara mengambil dua sampel kapal secara accidental sampling berukuran 11–30 GT yang sedang dibangun di galangan kapal tradisional di Tapanuli Tengah. Pengolahan data dilakukan dengan perhitungan matematis dan simulasi stabilitas. Analisis data dilakukan secara deskriptif dan komparatif. Hasil penelitian menunjukkan bahwa dimensi utama kasko kapal bubu dan gillnet yang diteliti telah sesuai sebagai kapal static gear pada umumnya di Indonesia. Stabilitas kapal yang diteliti juga telah sesuai dengan kriteria IMO. Berdasarkan simulasi, kondisi kapal saat beroperasi di fishing ground merupakan kondisi yang memiliki tingkat stabilitas paling tinggi. Selain itu, simulasi kapal menunjukkan stabilitas yang lebih baik diperoleh saat kapal mengoperasikan gillnet. Kata kunci: desain kapal, kapal perikanan, kasko kapal, stabilitas, vertical centre of gravity (KG), Statistics of the Sibolga Archipelagic Fishing Port (PPN) for period of 2016 to 2020 shows that the type of 11-30 GT fishing vessels calling at the port are mostly liftnet, gillnet and trap. Those vessels are classified as vessels operating static fishing gear which require high stability performance, hence the hull should be designed accordingly. However, the vessels used by the fishers of Central Tapanuli are vessels with round bottom hull. This can be challenging, because rounded bottom can be very unstable. The purpose of this study was to analyze the stability of the vessel built in Central Tapanuli when operating traps and gillnets. The research was conducted by accidentally sampling two units of 11-30 GT vessels being built at a traditional vessels in Central Tapanuli. Data processing was carried out by mathematical calculations and stability simulations. Data analysis was carried out descriptively and comparatively. The results showed that the hull dimensions of the trap and gillnet vessels were similar to typical static gear operated in Indonesia. The stability of the vessel also met the IMO criteria. Stability simulation shows that when operating at the fishing ground, the vessel reach its highest level of stability. In addition, the simulation shows that better stability was obtained when operating gillnet. Keywords: fishing vessel, hull, stability, fishing vessel design, vertical centre of gravity (KG)
Keyword: fishing vessel, hull, stability, fishing vessel design, vertical centre of gravity (KG)

Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
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