Judul: Distribusi Ukuran Debu Jatuh Akibat Pengaruh Aktivitas Lalu Lintas.
Abstrak: Vehicles are one of factors causing air pollution. The dustfalls (DF) and suspended particles (TSP) are components that should be concerned in the ambient air quality management. The purpose of the research were to measure the generation of DF and TSP due to the number of vehicles, to analyze their correlation and DF size distribution as influenced by traffic activity. This research used gravimetric method. The analysis of DF concentration was based on SNI 13-4703-1998 and TSP concentration based on SNI 19-7119.3-2005. DF concentration was measured with Dustfall Canister, TSP concentration was measured with High Volume Air Sampler (HVAS) and DF size distribution was observed with a microscope. The concentration of DF in three sampling location had range around 0.4-11.5 ton/km2.month, while the concentration of TSP was 75.9-190.6 μg /Nm3. DF and vehicles showed negative correlation in three observation locations while TSP and vehicles showed positive correlation in Dramaga and Atang Sendjaja. The results of DF size distribution in three sampling location at a distance of 10 m from the road were dominated by the size of DF more than 10 μm, whereas at distances of 15 m and 20 m from the road were dominated by the size of DF of 2.5-10 μm.
Keyword: air pollution, dustfall, size distribution, suspended particulate, traffic

Judul: Bangkitan Debu Jatuh dan Total Partikel Tersuspensi Akibat Pengaruh Lalu Lintas
Abstrak: The increasing vehicle usage contributes to the rise of dustfall (DF) and suspended particles (TSP) concentration. The purpose of this study was to measure the generation of DF and TSP due to the number of vehicles (JK) and to analyze their correlation. This study was conducted on four roads,namely Ciomas, Dramaga,Sindang Barang and RE Abdullah roads. The study was conducted by installing dustfall canister for 24 hours.High volume air sampler was operated for 60 minutes simultaneously with traffic counting. The DF generation at four sampling points were less than 1 ton/km2.month. The range of TSP generation on Ciomas, Dramaga, Sindang Barang, and RE Abdullah were 57-243, 37-86, 37-177, 60-117 μg/Nm3 respectively. The significant value (α) between DF generation and JK type I in the morning was 0.037, type II in the morning was 0.002, type III in the morning was 0.031, type III was 0.001 in the night and type VI b was 0.009 The significant value between TSP generation and type III in the night was 0.002, type III total was 0.001, type VI a was 0.04 and type VI b was 0.019.
Keyword: vehicles., traffic, suspended particulate, correlation, dustfall

Judul: Biology Of Columbia Lance Nematode (Hoplolaimus Columbus Sher) On Soybean Excised Root Culture
Abstrak: S. Supramana, S. A. Lewis,.J. D. Mueller, B. A. Fortnum, and R. E. Ballard. 2001. Biology of Columbia lance nematod. ~ (Hoplolaimus columbus Sher) on soybean excised root culture. Nematropica 31 :283-2~)O. Feeding, egg development and oviposition, embryology, and postembtyonic development or Hoplolaimus col'lmbuswere observed on soybean (cultivar Hutcheson) excised root culture in Gam borg's B5 medium (pH 5.7,1.3% agar). Petri plate sterile cultures were placed inverted on a heated microscope stage (30°C) and observations were conducted using a color video camera and a time lapse digital videoca:;sette recorder. Oocytes were obsetved in each gonad 38 hours after feeding commenced and all egg possessing a terminal stalk was laid 96 hours later. Eggs were deposited it, the one-celled stag~ and a total of 217 hours (9 days) was required for a"newly laid egg to develop into a hatching second-stage juvenile at 30°C. Postembryonic development consisted of threejuvenile stages and an adult female with prior feeding occurring before molts and oviposition. The nematode fed ectoparasiticallyon the subepidermal cells and endoparasitically in the cortex and outer vascular tissue and remained at the infection site for 2·9 days. Key words: Columbia lance nematode, embryology, excised root culture, feeding behavior, HOfilo{aimus columbus, life cycle, oviposition, postembryonic development, soybean.
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