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: The Sumatran Genus Morinda L. (Rubiaceae)
Abstrak: The major revision of the genus Morinda for the Sumatran region was undertaken by Miquel in 1856 and 1862 but there has no comprehensive revision of the genus recently. Therefore the revision of the genus in Sumatra was done based on their morphological characters, especially to know the species of Morinda and their distribution pattern. A phylogenetic analysis was also studied to establish the relationship among the species using parsimony analysis. The present study revealed that there were eight species, six species among them were previously known as M. citrifolia L., M. jackiana Korth., M. leparensis Valeton, M. rigida Miq., M. tomentosa Roth, M. umbellata L., and two newly proposed species namely M. lanuginosa Suratman and M. wongiana Suratman. M. bracteata Roxb. var. latifolia Valeton was also proposed as the new synonym of M. citrifolia L. var. bracteata (Roxb.) Hook.f. An identification key and detailed description of the taxa were provided. The natural history data including habitat, distribution, uses and vernacular names were also presented. The most widespread species is M. citrifolia while the other species have a limited distribution. The highest number of the species is found in North Sumatra and Bangka Belitung which consist of 4 species respectively. The phylogenetic analysis based on morphological data showed that despite their poorly resolved phylogenetic tree, Morinda is undoubtedly a monophyletic genus.
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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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