Judul: Tipe Kerusakan Pohon Hutan Kota (Studi Kasus : Hutan Kota Bentuk Jalur Hijau, Kota Bogor - Jawa Barat)
Abstrak: Nowadays the quality of environment in urban area is getting decrease. One of ways that initiated concerning urban environmental quality management is setting urban forest in appropriate type and form based on main environmental problem issues in certain urban area. Greenbelt is one of urban forest form that most developed today. The greenbelt of roadside has many functions such as providing shade, trapping and absorbing the pollutants, reducing the noise and esthetical function. Trees are the main component to set the greenbelt. As trees are the most important component of greenbelt, health monitoring and maintaining of trees are needed in urban forest management. One of the methods used for monitoring the trees’ health is by inventing the trees’ damages. It is important since trees’ damage is potential in causing accidents and material loss. The aims of this study are to identify level of trees’ damages at roadside, identify types of trees’ damages and identify tress’ damage that potential causing accident. The result from this study hopefully can be useful to providing about the trees’ damage along greenbelt of dr. Semeru roadside and a recommendation to prevent and reduction the trees damage in greenbelt of dr. Semeru street of Bogor city. This study was conducted during 3 months (September-November 2009) along dr. Semeru street. Trees’ damages inventory was using Forest Health Monitoring method by observing three indications of tress’ damages, those were location of the damages, type of damages and level of seriousness condition of the trees. The trees’ damage along greenbelt of dr. Semeru roadside achived 91.38% that equal to 371 trees out of 406 total of trees there. Trees damage level was included as low level since the Damage Index Value (DIV) showed 6.12 (the highest scale is 21). There were 709 tress’ damage types. The biggest to smallest types of trees’ damages consisted of cancer (169 cases = 23.84%), broken or dead branch (116 cases = 16.36%), conks, fruiting bodies, and other indicators of advanced decay (109 cases = 15.37%), open wound (74 cases = 10.44%), brooms on roots or bole (68 cases = 9.59%), excessive brancing or brooms (53 cases = 7.48%), damaged foliage or shoots (29 cases = 40.09%), lost of apical dominance, dead terminal (27 cases = 3.81%), resinosis or gummosis (25 cases = 3.53%), broken bole or roots lees than 0.91 m (23 cases = 3.24%), broken or dead roots beyond 0.91 m (16 cases = 2.26%). There were 22 decay and holed dangerous tress. Cavity treatments can be done to maintain those trees but if the decays and holes were not forgiven, the best treatment is trees cutting.
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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: Synthesis of Biphasic Calcium Phosphate Made of Eggshells Through A Hydrothermal Method
Abstrak: Biphasic Calcium Phosphate mixed of hydroxyapatite and tricalcium phosphate. A hydrothermal method of synthesizing by mixing CaO as calcium source and (NH4)2HPO4 as phosphate source with distilled water. CaO got from calcination process made of eggshells. All samples were synthesized using hydrothermal reactor then followed by sintering process. The molar ratio of Ca and P for all samples was 0.5 M : 0.3 M. Hydrothermal temperature and sintering temperature were variated they are 250 ºC, 300 ºC for hydrothermal and 800 ºC, 900 ºC, 1000 ºC for sintering, higher treatment temperature, tricalcium phosphate appears. Final results of synthesis were characterized by using X-ray Diffraction and Fourier Transform Infrared. X-ray Diffraction patterns was ecompared with database Join Committee on Powder Diffraction Standards and found tricalcium phosphate and hydoxyapatite.
Keyword: biphasic calcium phosphate, hydrothermal, hydroxyapatite, tricalcium phosphate