Judul: Studi Potensi Pembangkit Listrik Tenaga Gelombang Laut dengan Sistem Overtopping di Pulau Pari.
Abstrak: Laut Indonesia masih belum digunakan sebagai sumber energi listrik. Salah satu sumber energi yang potensial dan melimpah dari laut adalah gelombang laut. Penelitian ini menjelaskan pengukuran karakteristik gelombang laut serta menghitung secara spasial dan temporal besarnya potensi energi gelombang laut di Perairan Pulau Pari menggunakan pembangkit listrik tenaga gelombang laut (PLTGL) dengan sistem overtopping. Energi yang dapat dipanen dari gelombang laut dihitung berdasarkan penggunaan konverter energi gelombang Wave Dragon. Konverter tersebut merupakan tipe terminator. Gelombang laut di pulau Pari dikategorikan sebagai smooth sea dengan tinggi gelombang signifikan 0.16-0.51 meter dan periode 2-4 detik. Berdasarkan hasil perhitungan, konverter energi gelombang berpotensi menghasilkan energi hingga 28 MJ dan daya hingga 6 MW. Berdasarkan hasil tersebut, PLTGL tipe overtopping Wave Dragon mampu memenuhi kebutuhan daya listrik di Pulau Pari dengan dua opsi, yaitu menggunakan 35 unit WD 1 di pesisir Pulau Pari dengan jarak 500 m dari pemukiman atau menggunakan 6 unit WD 2 dengan lokasi penempatannya berada di wilayah timur laut Pulau Pari yang berjarak 18 Km dari pemukiman Pulau Pari.
Keyword: daya, energi, gelombang, overtopping, Pulau Pari

Judul: A Study On Potential Renewable Energy From Ocean Waves in Palabuhanratu Bay
Abstrak: One of the sources of energy in the sea that can be utilized in Indonesia is wave energy. This study aims to see the potential of ocean wave energy in Palabuhanratu Bay spatially and temporally using a modeling method with the DELFT 3D application. The data sources used are bathymetry data from BIG, wind data from ECMWF, and wave data from Copernicus. Data processing is done by processing bathymetry and wind data first, which is then entered into the model configuration and then adjusted according to the moonson period and scenario. The sea wave power generator (PLTGL) converter scenario is used to estimate the existing potential using a Point Absorber converter. The wind in Palabuhanratu Bay is included in the category of slow gusts with the highest frequency in the category 2,10 – 3,60 m s-1 with a percentage of 30,5%. The sea waves in Palabuhanratu Bay are categorized into Slight Sea with significant wave heights ranging from 0 - 2 m with an average period of 15 seconds. Based on the model results, the wave energy transport has an energy value of up to 0 - 8 kW m-1 with the highest value occurring in the East Season. Based on these results, the Point Absorber type PLTGL produces electric power in Palabuhanratu Bay with two scenarios, the first scenario is in the inner bay which produces 0.09 MW of power with an average energy per day of 261 W. 2,7 MW with an average energy per day of 7344 W.
Keyword: Modelling, Palabuhanratu Bay, Renewable Energy, Waves

Judul: Sintesis 3-Benzoil-7-hidroksiflavon dari Resorsinol
Abstrak: Flavonoid is the most abundant naturally-occuring polyphenolic compound with C6-C3-C6 carbon skeleton. Flavones is a group of flavonoid having a broad bioactivity spectrum. In this experiment, 3-benzoyl-7-hydoxyflavone was successfully synthesized via 2-steps from resorcinol. In the first step, resorcinol was acetylated with AcOH/ZnCl2 producing resacetophenone with 89% yield. Subsequently, benzoylation and rearrangement of resacetophenone using 2 equivalent of benzoyl chloride and 7 equivalent of K2CO3 in acetone produced 3-benzoyl-7-hydroxyflavone with 62% yield. Synthesis of 3-benzoyl-7-hydroxyflavone from resorcinol provided evidence for new reaction mechanism of flavon formation without Baker-Venkataraman rearrangement proposed by several previous researchers. All products in this study has been characterized spectroscopically.
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