Judul: Identifikasi Nilai Konservasi Tinggi Keanekaragaman Hayati di Kampus Institut Pertanian Bogor Darmaga Jawa Barat
Abstrak: The research was conducted in Bogor Agricultural University Campus, located in Darmaga, Bogor, West Java, that has higher value of biodiversity compared to other areas surrounding. The research was aimed to identify areas that have high conservation value of biodiversity in the location studied. The study was carried out from Februari to April 2012. Primary data were collected from direct survey, and the secondary data were obtained from interview and literature study. Among total ± 256,97 hectares of IPB Campus area, the study identified about 65,11 hectares (25,34 %) of the areas having high conservation value, such as Riparian of Cihideung and Ciapus River, Sengon Forest near Rectorat building, Al-Huriyah forest, Cikabayan forest, LSI Lake (Situ Leutik), Forest near Sylva dormitory, Arboretum of Forest Faculty, and Arboretum of Tropical Forest .
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Judul: Keanekaragaman Spesies Tumbuhan Langka dan Sebarannya di Kampus IPB Darmaga
Abstrak: Various vegetation cover in IPB Darmaga Campus makes this place has plenty kinds of plants including naturally and wildly grown plants. Some of the plants are included as rare plants species. The rare plants species are potential to be utilized as media for conservation education. However, there’s no research yet about those rare plants and its distribution in IPB Darmaga Campus. The purpose of this research was to identify, determine the distribution, and document the history of rare plants species in IPB Darmaga Campus. Based on this research, there were 30 rare plants species from 18 families. Dipterocarpaceae was recorded as the dominating family. These rare plants species were dominated by tree habitus and were distributed in the whole area of IPB Darmaga, but mostly found in Faculty of Forestry area. These species were mostly planted by lecturers and alumni of Faculty of Forestry, Bogor Agricultural University (IPB). The purpose is for collection and student learning media.
Keyword: Bogor Agricultural University (IPB), rare plants species, IPB Darmaga Campus, conservation education

Judul: Peran Surfaktan Setiltrimetilamonium Bromida dan Natrium Dodesil Sulfat pada Sintesis ZnO dengan Metode Hidrotermal
Abstrak: Zno crystal is the main preference material in various applications recently, such as in semiconductors, ultraviolet lasers, and catalysts. This study aims to synthesize ZnO with addition of surfactant. ZnO crystals were synthesized by reacting ZnSO4, KOH, and surfactants using hydrothermal method. The first step was to determine the best ratio of ZnSO4: KOH (1:2; 1:3; 1:4, and 1:5) based on X-ray diffraction. The second step was to evaluate the role of surfactan cetyltrimethylammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) on the synthesis of ZnO crystals. The result of this study showed the best ratio of ZnSO4:KOH was 1:3, based on the least of impurities and the highest degree of crystallinity (85.64%). The addition of surfactant CTAB and SDS in the synthesis of ZnO increased the degree of crystallinity, which were 98.28% and 92.17%, respectively. Based on mathematical calculation using Scherrer equation, the crystal size without surfactant was 32 nm, whereas with CTAB and SDS the crystallited size were 28 nm and 29 nm, respectively. The degree of crystallinity and crystal size indicated that CTAB surfactant produce ZnO crystals with the best characteristics as compared to SDS surfactant or without surfactant.
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