Judul: Morfometri Kumbang Penyerbuk Kelapa Sawit (Elaeidobius kamerunicus Faust)
Abstrak: Pollination of oil palm mediated by wind or weevil. E. kamerunicus is an effective pollinator of oil palm. The purpose of this research was to analyze the morphometry of E. kamerunicus as oil palm pollinators. Weevils samples were collected in four regions in West Java and Banten, i.e. Rangkasbitung, Sukabumi, Cianjur, and Jasinga. Two hundreds individual of weevil were collected in each location consisted of 100 males and 100 females. Measurement of body part of E. kamerunicus were conducted on 11 characters using Raster Image software. Body measurements were tested by ANOVA and post hoc test with Tukey using R software. Male and female weevils of E. kamerunicus have different body sizes in each location. Mean of total length of male weevils was 3,443 mm (2274-4202 mm), total body width was 1,385 mm (1099-1700 mm) and abdomen height was 1.044 mm (0.798-1.328 mm). Mean of total lenght of female weevil was 3,046 mm (2008-3825 mm), total body width was 1,245 mm (1026-1482 mm) and abdomen height was 0.956 mm (0.756-1.196 mm). Total body length of weevil was largest in Cianjur followed by weevils in Jasinga, Rangkasbitung, and Sukabumi.
Keyword: Bogor Agricultural University (IPB), pollination, morphometry, oil palm, Elaeidobius kamerunicus

Judul: Demografi Kumbang Penyerbuk Kelapa Sawit, Elaeidobius kamerunicus (Coleoptera : Curculionidae)
Abstrak: Oil palm is a specific host plant for the weevil E. kamerunicus. These weevils can only eat, lay eggs, and breed in oil palm male flowers. This study aimed to study demographics of E. kamerunicus as oil palm pollinators, such as biology, life table, and the survivorship. A pair of E. kamerunicus were reared in the box contained male flowers spikelet. At the base of spikelet were immersed by water at film bottle. Body and sex ratio were observed during development of egg to adult. Demographic study were analyzed based on gross reproductive rate (G), net reproductive rate (R0), generation time (T), and intrinsic growth rate (r). In average life cycle of E. kamerunicus was 33 days i.e. 2.5 days of egg, 12 days of larvae, 5 days of pupae, and 15 days of male and 18 day of female adult, respectively. Demography of the weevil were: gross reproductive rate was 6 individuals, net reproductive rate was 3 individuals, generation time was 15 days, and intrinsic growth rate was 0.06. In a life cycle, fecundity of E. kamerunicus was 27 eggs and mortality from egg to adult was 72.9%. Based on the survivorship curve, mortality in early phase was constant and increase at adult phase.
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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