Judul: Kajian Kesesuaian Wisata Arung Gelombang di Pantai Citepus aPalabuhanratu, Jawa Barat.
Abstrak: Arung Gelombang or sea rafting is one of coastal tourism that unique, challenging and found in Citepus Beach. Different with rafting conducted in rivers,Arung Gelombang done at sea by wading waves shore. Arung Gelombang still new in Indonesia and there only view one of them in Citepus Beach. Result, show the main indicators for the suitability of Arung Gelombang tourisms are currents, waves, wind, beach structure and dangerous biota. Based on the Index Calculation Arung Gelombang in Citepus has 60% value. This is categorize S2, suitable. Based on coastal landmass 3,8 ha, so carrying capacity in Arung Gelombang is 20 people per day. Factor potential danger in Arung Gelombang are wave, current, wind, dangerous biota and equipment of Arung Gelombang. Level of risks in Arung Gelombang activity in Citepus has varied from low to middle risk;being that produces management option, accept tolerable to reduce risk. This imply management measure of safety site plan and safety management
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Judul: Identifikasi Fenomena Arus Rabak (Rip Current) Di Kawasan Wisata Pantai Teluk Palabuhanratu, Sukabumi Jawa Barat.
Abstrak: Setiap tahun sering terjadi kecelakaan di kawasan wisata pantai Teluk Palabuhan yang menyebabkan terjadinya kematian wisatawan. Hal ini disebabkan kurangnya informasi mengenai bahaya di kawasan wisata terutama arus rabak. Arus rabak merupakan arus yang bergerak dari pantai menuju laut lepas. Penelitian ini bertujuan mengidentifikasi lokasi, ciri, dan mekanisme arus rabak di kawasan wisata pantai Teluk Palabuhanratu. Arus rabak diidentifikasi melalui analisis data angin, batimetri, gelombang, pasang surut, data statistik korban tenggelam dan foto udara. Angin di Teluk Palabuhanratu dominan berhembus dari arah tenggara. Analisis data batimetri menunjukan karakteristik batimetri dan morfologi di Teluk Palabuhanratu berperan dalam pembentukan arus rabak. Selain itu, karakteristik gelombang di beberapa kawasan wisata Teluk Palabuhanratu memiliki arah rambatan gelombang berkisar dari 0.789° hingga 20.59° yang mendukung proses terbentuknya arus rabak. Berdasarkan analisis pasang surut pula terdapat indikasi akumulasi massa air di sekitar barat dan timur Tempat Pelelangan Ikan (TPI) Palabuhanratu. Analisis foto udara menunjukan adanya indikasi arus rabak di Pantai Kebon Kelapa, Pantai Citepus, Pantai Karanghawu dan Pantai Loji. Arus rabak di kawasan wisata Teluk Palabuhanratu dapat ditandai dengan adanya perairan tenang diantara gelombang pecah. Korban tenggelam paling banyak di Teluk Palabuhanratu terjadi pada kondisi surut.
Keyword: arus rabak, gelombang, pasang surut, Teluk Palabuhanratu, wisata pantai

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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