Judul: Keanekaragaman Tumbuhan Paku Terestrial di Hutan Kota DKI Jakarta
Abstrak: Urban forest is an ecosystem consisted of plant vegetation community that resembles natural forest. Trees within the urban forest form canopy that construct well-suited environment for the understory life. One of the understory is fern. Fern is a vascular and intermediate plant that produces spores as its main characteristic. This research was intended to compare the diversity of fern under three urban forests in DKI Jakarta region which were the urban forest University of Indonesia (UI), Arboretum Cibubur, and urban forest PT Jakarta Industrial Estate Pulogadung (PT JIEP) Pulogadung. The research was started in November 2011 until March 2012. Vegetation analysis was made by doing purposive sampling with square method. Fern and non-fern specimens were collected for herbarium purpose then were identified based on identification book. Light intensity, temperature, humidity, soil pH were measured and recorded as supported data. The other environment factors that measured were physical and chemical structures of soil and also the quality of the air. The coverage data and the frequency of each species were used to count the importance value index (INP). Sharon Diversity Index (H'), Evenness Index (E), and Sorenson Similarity Index (IS) were also counted in. There were epiphytes fern (4 species) and terrestrial fern (18 species) in the research urban forest. The ferns have herb habit, but they varied in the growth types which are erect; creeping and climbing. Fern leaves have variation in size, shape of fertile and sterile leaves, shape of the first leaf and so on. Based on the leaf size, two kinds of leaf, microphyl and megaphyl, were found. Based on the different shape of fertile and sterile leaves, monomorphyc and dimorphic leaves were found. The shape of monomorphyc leaf varied which were simple, pinnatus and bi-pinnatus. Fern reproductive structure in urban forest varies in the sori shape, location and composition, such as 1) sporangium is located in the leaf tips, form organ so called as strobilus; 2) longitudinal grooved sori on the edge as though covering the edge; 3) sori is located along vascular leaf between costa and the edge of the leaf; 4) sori is rounded or oval spreaded on the vascular leaf with or without indusium; 5) sori is rounded or oval, located on the tips on the free vascular near the leaf edge; 6) sori on the fertile leaflet produces sporangia that spread from the edge of the leaf to the venation tips. Sporangia on two rows is covered by indusia. The sum of terrestrial ferns found in three research urban forests were 18 species belong to 8 familia and 11 genera. In UI urban forest, it was found 10 genera with 14 species; in Arboretum Cibubur, it was found 8 genera with 11 species; but there was no fern in PT JIEP urban forest. The number of all individual ferns found in three urban forest were 1030, consisted of 334 individual in Arboretum Cibubur urban forest and 696 in UI urban forest. The species diversity index (H' = 1.97) and evenness index (E = 0.82) in Arboretum Cibubur urban forest was higher than that of
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Judul: Keanekaragaman Tumbuhan Paku (Pteridophyta) di Taman Kota Bumi Serpong Damai, Tangerang Selatan
Abstrak: Tumbuhan paku yang dijumpai di ruang terbuka hijau cukup beragam meliputi kelompok epifit dan terestrial. Taman kota berfungsi sebagai area rekreasi publik. Tumbuhan paku di taman kota berperan dalam menyeimbangkan ekosistem. Keanekaragaman tumbuhan paku di hutan alami sudah banyak dilaporkan sebelumnya, namun untuk taman kota belum banyak dikaji. Penelitian ini bertujuan mengidentifikasi tumbuhan paku, serta menganalisis komposisi dan keterkaitan antara kondisi iklim mikro terhadap keanekaragaman tumbuhan paku di Taman Kota Bumi Serpong Damai, Tangerang Selatan. Data keanekaragaman tumbuhan paku diperoleh dengan metode kuadrat bertingkat dan pembuatan plot (2 m x 2 m untuk paku terestrial dan 60 cm x 50 cm untuk paku epifit). Faktor yang berpengaruh terhadap keanekaragaman tumbuhan paku dianalisis dengan Principal Component Analysis (PCA). Tumbuhan paku di Taman Kota Bumi Serpong Damai, Tangerang Selatan berjumlah 14 spesies termasuk dalam 9 famili yang terdiri atas 10 paku terestrial dan 4 paku epifit. Faktor-faktor yang mempengaruhi keanekaragaman tumbuhan paku yaitu kelembapan, suhu, intensitas cahaya dan kecepatan angin. Paku terestrial yang memiliki indeks nilai penting tertinggi yaitu Cyclosorus heterocarpus (74,95%) dan paku epifit yaitu Drynaria quercifolia (83,80%)., The ferns found in green open spaces are quite diverse, including epiphytic and terrestrial groups. City parks serve as public recreation areas. Ferns in city parks play a role in balancing the ecosystem. The diversity of ferns in natural forest has been reported before, but for city parks it has not been studied much. This study aimed to identify fern, as well as analyze the composition and association between microclimate conditions to the diversity of fern in Taman Kota Bumi Serpong Damai, South Tangerang. Data on the diversity of ferns were obtained by stratified squares method and plotting (2 x 2 m for terrestrial fern and 60 x 50 cm for epiphytic fern). Factors that influence the diversity of ferns were analyzed using Principal Component Analysis (PCA). There are 14 species of ferns in Bumi Serpong Damai City Park, including 9 families, consisting of 10 terrestrial ferns and 4 epiphytic ferns. The factors that influence the diversity of ferns are humidity, temperature, light intensity and wind speed. The terrestrial fern with the highest index of importance was Cyclosorus heterocarpus (74.95%) and epiphytic fern was Drynaria quercifolia (83.80%).
Keyword: epiphytic ferns, microclimate, PCA, terrestrial ferns

Judul: Konversi Asam Stearat dan Asam Oleat Menjadi Senyawa Oksazolina dengan Katalis Zeolit Teraktivasi Berbantuan Gelombang Mikro.
Abstrak: Oksazolina adalah senyawa heterosiklik dengan R tertentu dapat digunakan sebagai antikorosi karena mempunyai kerapatan elektron yang tinggi sehingga dapat terabsorpsi kuat pada permukaan logam. Penelitian ini bertujuan menyintesis senyawa 2-heptadesil-4,5-dihidrooksazol dan (Z)-2-heptades-8-en-1- il-4,5-dihidrooksazol dengan melakukan konversi dari asam stearat dan asam oleat menggunakan aminoalkohol sebagai reagen dan zeolit teraktivasi sebagai katalis berbantuan gelombang mikro pada beragam daya. Daya optimum ialah 300 W. Rendemen yang diperoleh yaitu 55% untuk senyawa (Z)-2-heptades-8-en-1-il-4,5- dihidrooksazol dan 6,5% untuk senyawa 2-heptadesil-4,5-dihidrooksazol. Stuktur oksazolina dicirikan berdasarkan spektrum inframerah yang menghasilkan pita spektrum baru pada bilangan gelombang 1650 cm-1 dan 1044 cm-1, masingmasing untuk gugus fungsi imina dan eter, selanjutnya dicirikan dengan teknik resonansi magnetik inti.
Keyword: antikorosi, asam oleat, asam stearat, oksazolina, oksazolina, zeolit