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: 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: 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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