Judul: Pemanfaatan Hijauan di Lahan Irigasi di Desa Cihideung Udik, Cibitung Tengah, dan Situ Udik, Kabupaten Bogor, Jawa Barat
Abstrak: Irrigation dike which overgrow with a variety of vegetation potentially as forage source, but still underutilized by farmers. The aim of this research was to evaluate how much irrigation area that is potential for forage source and mapping potential forage source at Cihideung Udik, Cibitung Tengah, and Situ Udik village. This research used geographic information system mapping, botanical composition, vegetation analysis, and capacity improvement of ruminant livestock population. The result of botanical composition showed that Wedelia montana var pilosa H., Brachiaria mutica (Forsk.) Stapf., and Panicum repens L. occupies the main peringkat. The vegetation analysis showed that Wedelia montana is the dominant plant. The conclusion of this research was irrigation area at Cihideung Udik, Cibitung Tengah, and Situ Udik village have forage potential to be used by farmers. The two forages that dominate these villages are Panicum repens L. and Brachiaria mutica (Forsk.) Stapf..
Keyword: irrigation, geographic information system, forage potential, botanical composition

Judul: Analisis Tata Guna Lahan dan Kecukupan Irigasi di Desa Cihideung Udik dan Desa Cihideung Ilir, Lingkar Kampus IPB
Abstrak: Land and water are the most important elements that support agriculture. Land use is the way of planning land usage of certain area, by dividing it based on specific functions of settlement, paddy field, plantation, industry, etc. The purposes of this research are to identify land use and irrigation availability for planting, and to find out irrigation sufficiency in two villages around campus. Irrigation requirement for the both villages were sufficient. Although the agriculture area is wide, it was only used for planting of palawija. Based on the result of the both villages availability, the land can be planted with the pattern of paddy-paddy-palawija. Irrigation requirements were obtained using Cropwat. In Cihideung Udik Village, the irrigation requirement was 0.07751 l/s and the average daily debit was 22.36 l/s. In Cihideung Ilir Village, the values obtained were respectively 0.29313 l/s and 23.39 l/s. These values showed that both villages have sufficient water supply. The average daily debit were far bigger than the irrigation requirement. A change in land use was also discovered, from farming area to settlement. Total farming area in 2009 (village profile) was less than the one in 2008 (Bakosurtanal).
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Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
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