Judul: Revision of Calamus and Daemonorops (Arecaceae) in Sulawesi
Abstrak: The rattans of Sulawesi presented by three different genera Calamus, Daemonorops and Korthalsia. Calamus and Daemonorops belong to subtribe Calaminae whereas Korthalsia belongs to subtribe Korthalsiinae. In Sulawesi Calamus is the biggest rattan genus with the number of species more than 23. This genus is very common tropical genus with the centre of diversity is in South East Asia. In Sulawesi Daemonorops consist of 7 species, whereas Korthalsia has one species only that is K. celebica, endemic species to Sulawesi. Recently the biodiversity of Sulawesi has been under severe threats caused by increasing large scale deforestation projects. Many commercial rattans has been illegally harvested and used as raw material for rattans industry. This alarming fact has ecological impact to the rattans of Sulawesi in the form of imminent massive of biodiversity lost. This situation is very true especially for the rattans because almost all species are climbers and they need trees to support their existence. With the intention to minimize the thread to the existence of the rattans of Sulawesi, basic study on the rattans taxonomy is needed as well as accurate documentation. Definite species delimitation is essential to be studied as the diversity continuously under threats and decreased.
Keyword: Sulawesi, Calamus, Daemonorops, Korthalsia, Korthalsia celebica

Judul: Keragaan Rotan di Areal Konservasi Ex-Situ Hutan Pendidikan Gunung Walat Sukabumi, Jawa Barat
Abstrak: Ex-situ conservation stands has been established in Gunung Walat University Forest (GWUF) since 2005. However, the performance of rattan has never been evaluated. The objectives of the research were i) to review the correct species name of rattan and ii) to assess the growth variation of rattan with respect to shade trees, environmental factors (light and pest). The growth performance was observed through assessment of species composition and structure of the stand including distribution of diameter and length, biomass estimation and environmental effects (light and pest). The results showed that i) there were 3 (three) rattan species planted in the ex-situ conservation stand, namely Calamus manan, Daemonorops melanochaetes and Daemonorops rubra, ii) The composition and structure of the stands were still dominated by the shade trees. Rattan was found predominantly at strata C (4–20 m) and strata D (1–4 m). The normal distribution was observed only on diameter and length of C.manan and D.melanochaetes, respectively. The highest biomass was observed in D. rubra that was estimated as much as 26.6 tons/ha. The light had significant effect on D.rubra diameter only. On the other hand, pest had no significant effect on rattan growth variables.
Keyword: rattan, growth performance, ex-situ conservation

Judul: Pembuatan dan Karakterisasi FET Berbasis Zinc Oxide (ZnO) untuk Sensor Sensor Ultra Violet (UV)
Abstrak: Sensor Field Effect Transistor (FET) dibuat dari oksida logam, logam, polimer konduktif organik, dan semikonduktor. Sensor FET terdiri atas tiga lapisan, yaitu lapisan zinc oxide sebagai lapisan aktif, lapisan SiO2 sebagai insulator dan lapisan silikon tipe-p. Sensor FET berbasis ZnO sensitif terhadap cahaya UV, yang dapat dilihat dari hasil karakterisasi arus-tegangan dan karakterisasi respons dinamik yang menunjukkan respons terhadap adanya cahaya UV. Respon sensor FET terhadap cahaya UV memperlihatkan terjadinya peningkatan arus drain-source, dikarenakan terjadinya penurunan resistansi pada daerah lapisan zinc oxide. Respon sensor FET terhadap cahaya UV memperlihatkan bahwa apabila sensor diberikan cahaya UV maka terjadi peningkatan arus drain-sourceakibat adanya penurunan resistansi lapisan ZnO. Respon dinamik sensor FET memperlihatkan adanya perubahan tegangan output saat diberikan cahaya. Terjadi penurunan tegangan output saat diberikan cahaya UV pada setiap peningkatan intensitas. Sensor FET memiliki waktu respon sekitar 2.6 detik dan waktu pemulihan sekitar 2.8 detik. Hasil ini menunjukkan bahwa sensor FET memiliki waktu respons yang lebih cepat dari pada waktu pemulihannya
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