Judul: Perbanyakan in vitro Alocasia suhirmaniana dan analisis keragaman genetik Alocasia grup Longiloba koleksi Kebun Raya Bogor
Abstrak: Alocasia suhirmaniana (Araceae) is a new species of genus Alocasia with beautiful leaves. This plant grows endemic in South-East Sulawesi. Alocasia suhirmaniana collected from Taman Wisata Alam Mangolo, Kolaka, South-East Sulawesi has been grown at the Centre of Plant Conservation, Bogor Botanic Garden-LIPI. This plant is now difficult to be found in their original area and considers as endangered species. Therefore, conservation and multiplication of its domestication is needed. The aim of the research was to establish a protocol for in vitro propagation from bud explant
Keyword: 

Judul: Tribe Colocasieae (Araceae) in Indonesia
Abstrak: Colocasieae Engler is one of the members of Araceae family which has high economic value. In Malesia, especially in Indonesia Colocasieae consist of 3 genera, Remusatia, Colocasia and Alocasia. Study of Araceae especially on the relationship among members of Colocasieae is still poorly known. A total number of 295 specimens deposited in Herbarium Bogoriense (BO), Singapore Herbarium (SING), Bogor Botanical Garden Herbarium and recent collections from several locations in Indonesia such as Mount Wilis (East Java), Mount Watuwila and Natural Forest Ulungolaka (South East of Sulawesi) and Gunung Leuser National Park, Ketambe (Sumatra, Aceh) were examined using morphological approach. 20 species of Colocasieae are known from Indonesia, consisted of 17 species of Alocasia, two species of Colocasia and one species of Remusatia. The presence of Alocasia flemingiana and Remusatia vivipara in several islands in Indonesia is newly reported. Phylogenetic analysis using Maximum Parsimony indicated that each genus is monophyletic. Alocasia is more closely related to Colocasia while Remusatia forms a different clade. The grouping some species in Alocasia clade supports Hay’s 1991 and 1998 group, although these grouping are not supported by high bootstrap value. The lack of phylogenetic signal in morphological data shows the need for additional informative data, such as molecular data for revealing more robust phylogenetic relationships.
Keyword: Colocasieae, Alocasia, Colocasia, Remusatia, Indonesia

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