Judul: Keanekaragaman, parasitisasi dan penyebaran parasitoid pada  pertanaman padi dan tebu di daerah geografik yang berbeda  di Pulau Jawa
Abstrak: Penelitian dilaksanakan di beberapa wilayah di Pulau Jawa, diantaranya Kawasan Taman Nasional Gunung Halimun, Subang, Purwokerto dan Yogyakarta. Penelitian dilaksanakan mulai Oktober 2000 sampai Desember 2001. Penelitian bertujuan untuk mempelajari keanekaragaman, parasitisasi dan penyebaran parasitoid pada lansekap pertanian kompleks dan sederhana di daerah gcografik yang berbeda di Jawa, dan di kawasan Taman Nasional Gunung Halimun pada musim tanam yang berbeda. Parasitoid dikoleksi dari inang yang dianibil dari lapang dengan menggunakan metode transek. Keanekaragaman parasioid diukur dengan indeks Shannon dan kemiripan spesies antar wilayah diukur dengan menggunakan indeks Jackard.
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Judul: Keanekaragaman dan Parasitisasi Parasitoid pada Pertanaman Sayuran di Bogor
Abstrak: In an agricultural area, agroecosystem could influence diversity and parasitism of parasitoids as natural enemies of insect pests. A survey to learn diversity and rate of parasitism of insect pests by parasitoids had been conducted in several agricultural fields with different criteria, such as farming practice (organic and convensional), species richness of vegetable crops (5-8 sp. and 9-15 sp.) and different crop ages (3, 4 and 5 months), in Bogor from August to October 2012. By making a 50 steps line transect for every field, eggs, larvae and pupa of insect pests were collected monthly, reared in laboratory and incidence of parasitism were calculated. The results showed that there were no significant differences on diversity and rate of parasitism based on three criterias used. However, based on the diversity of vegetable plant species around, the rate of parasitism in field with less plant species diversity (5-8 sp.) was higher than the field with more vegetable plant species diversity (9-15 sp.). These results might be caused by the limited number of samplings conducted and other potential factors such as surrounding habitat, seasonal fluctuation, and complex interactions between species in agroecosystem.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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