Judul: Efektivitas Jalur Hijau Jalan Dalam Mengurangi Polutan Gas No2 Di Jalan Tol Jagorawi
Abstrak: Commonly, every big cities has a lot of factories and a high amount of vehicles that contribute to the air pollution which can lead to the decreasing of urban landscape quality. NO2 pollutant which is emitted by vehicles on the road can be reduced by modifying a landscape such as utilization of roadside vegetation. The aim of the research was to analyze the NO2 concentration distribution and also to analyze the effectiveness of Mahoni (Swietenia macrophylla) and Glodogan Bulat (Polyalthia fragrans) in reducing NO2 pollutant concentration in the air. This research was conducted in three different parts of the roadside vegetation of Jagorawi highway, there were plot I which vegetation was Mahoni (Swietenia macrophylla), Plot II which vegetation was Glodogan Bulat (Polyalthia fragrans), and Plot III which did not has trees (control). The canopy density of Mahoni vegetation (Plot I) and Glodogan Bulat vegetation (Plot II) were analyzed by Leaf Area Index (LAI) Method using Hemisphericalview Canopy Analyzer and measured by HemiView2.1 Canopy Analyzer software. NO2 concentrations were analyzed by Griess-Saltzman method performed by Inviromental research center, Bogor Agricultural University. The purpose of leaves sampling of Mahoni and Glodogan Bulat vegetations at the highway and BUPERTA (as a control) conducted on August 27th and September 27th in 2015 was to analyzed total N content on leaves as an indicator of NO2 absorption in the air. Total N content on leaves were analyzed by Kjendhal Method at Agronomy and Horticulture (AGH) Laboratory. The results of the analysis showed the distribution of NO2 concentration at Plot I (Mahoni) declined 52.1% and 84.8% in distance of 10 and 30 m respectivety. Meanwhile, the NO2 concentrations at Plot II (Glodogan Bulat) rise at 10 m distance on the percentage of 21.1% and declined at 30 m distance on the percentage of 18.1%. Plot III declining of NO2 concentrations tend to be consistent at a distance of 10 m at 49.4% and 30 m at 43.3% from the pollutant source. The absorption effectivity of NO2 by Mahoni was greater than control in the amount of 41.4% and also was greater than Glodogan Bulat in the amount of 66.7%. The results of Leaf Area Index (LAI) measurement showed that Glodogan Bulat has a higher canopy surface than Mahoni. However, Mahoni effectiveness of NO2 absorption was better than Glodogan Bulat. This was reinforced by the increasing of difference in the percentage of total N of Mahoni leaves which were higher than Glodogan Bulat leaves.
Keyword: Griess-Saltzman Method, Leaf Area Index, NO2, total N

Judul: Distribution of NO2 Pollutant from Transportation  Activities in Environment Near Elevated Road
Abstrak: Meningkatnya aktivitas manusia secara tidak langsung berdampak kepada kebutuhan transportasi yang dapat menyebabkan terjadinya kemacetan . Jumlah kendaraan akan meningkat sehingga emisi yang dihasilkan kendaraan juga akan meningkat. Tujuan dari penelitian ini adalah menganalisa sebaran polutan gas NO2; menganalisa faktor iklim yang memengaruhi konsentrasi gas NO2 di sekitar jalan layang; serta memberikan rekomendasi perencanaan tata hijau untuk mengurangi polutan gas NO2. Pengukuran dilakukan pada jarak 0, 10, dan 30 meter dari bahu jalan. Sampling udara dilakukan dengan menggunakan alat impinger air sampler, dan dilanjutkan analisis menggunakan metode Griess – Saltzman untuk mendapatkan angka konsentrasi NO2. Hasil penelitian menunjukan pada jarak 0 meter terjadi perbedaan rata-rata konsentrasi dengan konsentrasi plot vegetasi sebesar 47,70 µg/Nm3 dan plot terbuka 50,52 µg/m3 . Jarak 10 meter perbedaan rata rata konsentrasi lebih kecil dengan konsentrasi plot vegetasi sebesar 46,17 µg/Nm3 dan plot terbuka 46,57 µg/m3 . Jarak 30 meter perbedaan rata-rata konsentrasi berubah kembali dengan konsentrasi plot vegetasi sebesar 44,53 µg/Nm3 dan plot terbuka 45,17 µg/m3 . Hasil t test menunjukan rata-rata konsentrasi plot vegetasi dengan plot terbuka tidak memiliki perbedaan yang nyata. Jarak memiliki hubungan semakin kecil jarak atau semakin dekat dengan jalan maka semakin besar nilai konsentrasi NO2. Kecepatan angin plot terbuka memiliki hubungan sangat kuat dengan konsentrasi NO2, sedangkan kecepatan angin plot vegetasi memiliki hubungan kuat dengan konsentrasi NO2. Hubungan kecepatan angin kedua plot dengan konsentrasi sama yaitu semakin tinggi kecepatan angin maka semakin besar nilai konsentrasi NO2. Rekomendasi penanaman jalur hijau terditi dari kelompok tanaman penutup tanah selebar 4,5 meter dan sisa rumija (minimum 30 meter) ditanam tanaman kelompok strata pohon, perdu/ semak. Jenis tanaman yang digunakan yaitu asam jawa (Tamarindus indica (L.)), akalipa merah (Acalypha wilkesiana (Muell. Arg.)), (dan rumput manila (Zoysia matrella (L.) Merr.)., Increased human activity indirectly affects the need for transportation which can cause congestion. The number of vehicles will increase so that the emissions produced by vehicles will also increase. The purpose of this research is to analyze the distribution of NO2 gas pollutant; analyze the climate factors that affect the concentration of NO2 gas around the overpass; as well as providing recommendations for effective roadside green planning to reduce NO2 gas pollutants. NO2 gas measured at a distance 0, 10, and 30 meters from the road on roads with and without green lanes. Air sampling was carried out using an impinger air sampler, and continued with analysis using the Griess – Saltzman method to obtain NO2 concentration figures. The results showed that at a distance of 0 meters there was an average difference in concentration with a vegetation plot concentration of 47,70 µg/m3 and an open plot of 50,52 µg/m3 . A distance of 10 meters means the difference in average concentration is smaller with a concentration of 46,17 µg/m3 in vegetation plots and 46,57 µg/m3 in open plots. At a distance of 30 meters, the average concentration difference changed again with a vegetation plot concentration of 44,53 µg/m3 and an open plot of 45,17 µg/m3 . The results of the t test showed that the average concentration of vegetation plots and control plots had no significant
Keyword: Griess Saltzman, Jalan Layang, Jalur Hijau Jalan, NO2, Sebaran Polutan

Judul: Embriogenesis ikan buta (Astyanax fasciatus)
Abstrak: Ikan buta Astyanax fasciatus adalah spesies ikan unik dari famili Characidae yang menempati perairan dalam gua di Wilayah La Cueva Chica-San Luis Potasi-Mexico. Ikan ini memiliki mata yang tereduksi (Blind Cavefish) dan warna kulit merah muda, pucat serta mengkilap.
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