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: Faktor Emisi Debu Jatuh Dan Total Suspended Particulate Dari Tanah Andosol Untuk Memprakirakan Penurunan Kualitas Udara Ambien
Abstrak: Kualitas udara ambien adalah faktor yang penting pada kehidupan manusia dan makhluk hidup lainnya, namun dengan meningkatnya pembangunan fisik kota, pusat-pusat kota dan pusat-pusat industri, kualitas udara ambien telah mengalami perubahan yang semakin menurun. Debu jatuh (DF) dan partikel tersuspensi total (TSP) sering digunakan untuk mengkarakterisasi kualitas udara di dekat sumber debu. Kedua parameter penting ini berkontribusi terhadap penurunan kualitas udara sehingga perlu diukur sesuai dengan peraturan pemerintah Republik Indonesia (PP41 / 1999). Tujuan dari penelitian ini adalah untuk (1) mengukur konsentrasi dari parameter DF dan TSP, (2) mengetahui faktor-faktor emisi yang dipengaruhi oleh kecepatan angin, kadar air tanah, persentase tutupan lahan, dan (3) menganalisis distribusi frekuensi ukuran DF. Penelitian dilakukan dari bulan September 2015 sampai Februari 2016 pada skala laboratorium terowongan uji, di mana permukaan tanah ditutupi oleh tanah Andosol yang berasal dari .Kabupaten Tanggamus di Provinsi Lampung. Metode gravimetri menggunakan Dustfall Canister digunakan untuk mengukur konsentrasi DF, sesuai dengan SNI 13-4703-1998. Pengukuran TSP dilakukan sesuai dengan SNI 19-7119.3-2005 dengan menggunakan High Volume Air Sampler. Analisis distribusi ukuran dustfall itu dilakukan dengan pengamatan langsung menggunakan mikroskop digital. Hasil penelitian memperlihatkan bahwa konsentrasi DF sekitar 5 ton/ km2.bulan. Rata-rata TSP adalah sekitar 116 mg / Nm3. Kedua konsentrasi DF dan TSP yang dibangkitkan, masih lebih rendah dari ambang batas baku mutu PP 41/1999, dan berkorelasi positif dengan kecepatan angin, berkorelasi negatif dengan kadar air tanah dan persentase tutupan lahan. emisi persamaan Faktor emisi yang dipengaruhi oleh kecepatan angin, kadar air tanah dan persentase tutupan lahan telah dikembangkan dan telah siap implementasi di lapangan untuk memprakirakan penurunan kualitas udara ambien, akibat bangkitan DF dan TSP pada tanah Andosol yang berasal dari Kabupaten Tanggamus. Distribusi ukuran DF didominasi oleh fraksi 10-100 μm.
Keyword: Andosol, bangkitan debu jatuh, distribusi ukuran debu jatuh, faktor emisi, partikel tersuspensi total (TSP), Tanggamus

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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