Judul: Struktur dan Pertumbuhan Karang Rekrutmen Pada Terumbu Buatan Modul Beton di Pulau Harapan, Kepulauan Seribu, DKI Jakarta
Abstrak: Coral reefs are a renewable resource that has the important function of Ecology, socio-economic, and culture. In Indonesia, the damage to the coral reef ecosystem is largely due to human activities. To speed up the recovery of coral reefs, several methods of rehabilisationare used such as transplantation and artificial reefs. The purpose of this study was (1) to know the growth rate of coral attached (recruitment) on concrete artificial reef modules, and (2) to determine the structure of coral communities on artificial reefs over a period of 1 year. In this study measured the growth of coral recruitment covering the length and width, survival rates, and recruitment of coral community structure. Types of coral recruitment was dominated by Pocillopora, Millepora and Acropora with a total of 59 species of 65 species of coral recruitment found. Growth in average length was highest in the range of months from January-May 2011 were 0.76±1.98 cm, and the width of the growth of the highest average in the range of months from May-July 2011 were 1.18±0.92 cm.
Keyword: reef community structure, coral recruitment, coral growth, artificial reefs

Judul: Implikasi Manajemen Penempelan Karang pada Terumbu Buatan Beton di Perairan Pulau Pramuka, Kepulauan Seribu, DKI Jakarta
Abstrak: Latest stage development of coral recruits community on concrete artificial reefs were observed for nine months (from October 2009 to July 2010) by visual census and underwater photography methods. Amounts of 10 units of concrete artificial reef deployed in Pramuka Island waters and Gosong Pramuka in 2001 were used as an objects in this research. As a comparation, the condition of coral coverage and reef fishes in natural reef were observed by line intercept transect, quadrate transect, visual census, and underwater photography methods. In order to measure coral coverage area we used ImageJ 1. 42q software. In March 2010, amounts 457 coral colonies from 21 genera and 216 coral colonies from 16 genera were found in Station 1 and Station 2 respectively. In July 2010, the percentage of coral coverage on concrete artificial reefs reaches 41.46±13.37% (mean±SD) in Station 1 and 20.38±6.08% (mean±SD) in Station 2, while the percentage of coral coverage on natural reefs were 23.14% and 40.43% in Station 1 and 2 respectively. The coral recruits coverage on concrete artificial reefs had a strong positive relationship with its fish abundance in Station 1 where coefficient of determination (R2) reached 0.71.
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Judul: Sintesis Flavon dari Fenol dan Benzoil Klorida
Abstrak: Flavone is a class of flavonoid, commonly found in plants with wide bioactivity spectrum. A widely used flavone synthesis route is through acidcatalyzed oxidative cyclization of β-diketone. In this study, unsubstituted flavone had been synthesized via 5-step from phenol, with 22% yield and successfully increased the yield of previous study on Fries rearrangement of phenyl acetate and benzoylation of o-HAP steps. Phenol was acetylated resulting 93% phenyl acetate. AlCl3-catalyzed Fries rearrangement in 1.5 hour and at 120 °C converted phenyl acetate into o-hydroxyacetophenone (o-HAP) with 40% yield. AlCl3 as catalyst produced o-HAP with higher and reproducible yield compared with BF3·Et2O and ZnCl2. Benzoylation of o-HAP followed by Baker-Venkataraman rearrangement of the ester product using KOH in dried pyridine produced β-diketone 1-(2- hydroxyphenyl)-3-phenylpropane-1,3-dione. The yield of ester and β-diketone were 71% and 85%, respectively. Finally, oxidative cyclization of β-diketone with sulphuric acid as catalyst produced 99% of flavone. The flavone product had been characterized spectroscopically and its melting point as well.
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