Judul: Keanekaragaman Oxydothis Penz. & Sacc. (Fungi, Xylariales) pada Palem-paleman (Arecaceae) di Kebun Raya Bogor
Abstrak: Palm (Arecaceae) is monocotyledonous plant and widely distributed worldwide. Oxydothis Penz. & Sacc. is a fungal genus belonging to phylum Ascomycota. Bogor Botanical Garden (KRB) is well-known as one of important ex-situ conservation of tropical plants, especially in Indonesia. This study was aimed at examining the diversity of Oxydothis associated with palms in KRB. Decaying fronds from Arecaceae sites with black, gray, or brown spot on the surface were collected. Asci, ascal ring, and ascospores were observed in shears medium, and Melzer reagent was used to see the amyloid reaction of ascal ring. A total 16 species were identified as follow: O. angustispora J. Fröhl. & K.D. Hyde, O. asymmetrica J. Fröhl. & K.D. Hyde, O. batuapoiensis J. Fröhl. & K.D. Hyde, O. belalongensis J. Fröhl. & K.D. Hyde, O. daemonoropsicola J. Fröhl. & K.D. Hyde, O. dispariapicis J. Fröhl. & K.D. Hyde, O. elaeicola Petr., O. extensa J. Fröhl. & K.D. Hyde, O. grisea Penz. & Sacc., O. hoehnelii (Rehm.) Sacc., O. hongkongensis J. Fröhl. & K.D. Hyde, O. licualicola J. Fröhl. & K.D. Hyde, O. nonspecifica J. Fröhl. & K.D. Hyde, O. rattanica J. Fröhl. & K.D. Hyde., O. rattanicola J. Fröhl. & K.D. Hyde, and O. rimicolla J. Fröhl. & K.D. Hyde.
Keyword: Arecaceae, Ascomycota, diversity, Bogor Botanical Garden, Xylariales

Judul: Studi Keanekaragaman dan Penyebaran Spasial Palem-Paleman (Arecaceae) di Hutan Lindung Gunung Slamet, Baturaden – Provinsi Jawa Tengah
Abstrak: Palm is one of interesting plant. It has been used for several needs and also a trading commodity. One of palms habitat is in Protected Forest of Mount Slamet. The threat of land conversion and forest fires is a problem in this area. The lack of information on the diversity, abundance and the distribution of palms make this area vulnerable and increated the possibility of unknown palms to go extinct. The purpose of the research is to describe the composition, diversity and the ecological distribution of palms and also analyzing the distribution of palms based on land and altitude. Research was conducted on May until June 2012, on two type of ecosystems natural forest and mix forest at Protected Forests of Mount Slamet. Data were collected using vegetation analysis method. Data of the palms were analyzed to obtain value of diversity, evenness and abundance of species. Spatial distribution Data were obtained from recording palms position. Thematic map of land and altitude was developed on processing the landsat map and divided them to different classes. Then, it was overlayed with palms point of occurence to produce a map of palms distribution based on land and altitude. Composition of palms on Protected Forests of Mount Slamet, on natural forest ecosystem found 12 species, and on mix forest ecosystem found 6 species. Distribution pattern of palms is clumped. The higest diversity of palms occurs on natural forest at 1.200 mdpl-1.300 mdpl with elevation 8-15 %, and mix forest at 900-1.000 mdpl with elevation 8-15%.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa