Judul: Evaluasi Kerusakan Jalur Hijau Jalan oleh Benalu di Jalan Medan Merdeka, Jakarta Pusat
Abstrak: Jalan Medan Merdeka Utara, Jalan Medan Merdeka Barat, dan Jalan Medan Merdeka Selatan memiliki sejumlah pohon jalur hijau yang ditumbuhi oleh tumbuhan benalu. Terdapat hanya satu spesies benalu yang ditemukan, yaitu Dendrophthoe pentandra (L.) Miq. Penelitian ini dilakukan untuk menganalisis vegetasi pohon inang yang terserang tumbuhan benalu, mengevaluasi kerusakan yang disebabkan oleh tumbuhan benalu, dan menyusun rekomendasi pemeliharaan pohon yang terserang tumbuhan benalu. Metode yang dilakukan adalah survei, dengan data yang dikumpulkan mencakup spesies dan jumlah inang yang terserang tumbuhan benalu; diameter tajuk pohon inang, diameter batang pohon inang, tinggi pohon inang; kelebatan tajuk pohon inang dan tumbuhan benalu. Hasil penelitian menunjukkan bahwa pada keseluruhan lokasi ditemukan hanya empat jenis spesies pohon inang yang terserang tumbuhan benalu, yaitu Swietenia mahogani (L.) Jacq., Pterocarpus indicus Willd., Bauhinia purpurea L., dan Cordia sebestana L. Spesies pohon yang banyak terserang oleh tumbuhan benalu adalah Swietenia mahogani (L.) Jacq. dengan indeks nilai penting sebesar 257.2. Di antara ketiga lokasi penelitian, jalur hijau yang mengalami kerusakan paling tinggi adalah Jalan Medan Merdeka Utara, dengan nilai kerusakan sebesar 26.2% dari total pohon rusak di seluruh lokasi penelitian. Pemeliharaan pada jalur hijau jalan yang terserang tumbuhan benalu bergantung pada tingkat kerusakan yang dialaminya.
Keyword: dominansi, estetika, frekuensi, kelimpahan, pemeliharaan pohon, pohon jalur hijau, tumbuhan benalu

Judul: Analisis Bahaya Kerusakan Pohon di Jalur Hijau Jalan Kota Magelang
Abstrak: The existence of trees at the landscape has an important role to create the comfort for users. However, the damaged trees may danger especially in high activity areas, as well as at the roadside greenbelt. This is because trees and the broken branches may fallen down which can lead to traffic accidents and endanger the safety of road users. This study aims to determine the physical condition of the tree, the tree damage and the level of tree risk. This research was carried out on the roadside greenbelt. In this case, the roads have been surveyed at five streets, i.e. Jendral Sudirman Street, Ikhlas Street, Tidar Street, Tentara Pelajar Street, and Pemuda Street in Magelang City. Data collection was conducted in order to find name of species, number of tree, tree dimensions, and type of damage. The research used the method of ISA Tree Risk Assessment. The result shows that there were 705 trees observed in five roadside greenbelt with 945 cases of damage. Based on the risk classification as much as 0,28% of trees is identified as a very high risk, 10,78% high risk, 25,11% medium risk, and 63,83% low risk. Based on those analysis, the recommendation of tree maintenance is development of the synchronization of data, preparation of maintenance strategies and maintenance techniques.
Keyword: failure tree, greenbelt, tree damage, tree maintenance, tree risk

Judul: Apatite Growth Optimation on Chicken Mucouse by Fourier Transform Infrared (FTIR) Characterization
Abstrak: Some experiment had been conducted to grow apatite from supersaturated solution of calcium phosphate ions on chicken mucouse. The calcium and phosphate ions were originated from Ca(NO3)2 and (NH4)2HPO4. Carbonate ions from (NH4)2CO3 was also used as starting solution. Experiment was carried out within about 5 hours at temperature 370 C and pH 7. Value of Ca+ : PO4 3- was 1.67, while molar ratio of CO3 2- : PO4 3- was 0.5 : 1. Molarity of molar ratio CO3 2- : PO4 3- variated approximately 0.15 : 0.30, 0.51 : 1.02, and 0.90 : 1.80. Mass of mucouse powder was constant 0.75 gram. The analysis result of Fourier Transform Infrared (FTIR) showed that the precipitation was apatite carbonate type A and B. In these experiment it was found out that the mucouse reduce the crystallinity of apatite precipitant, and the growth of apatite crystal was optimum at solution with molar ratio CO3 2- : PO4 3- about 0.15 : 0.30.
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