Judul: Analisis kawasan hutan dan kawasan lindung dalam rangka arahan penataan ruang di Kabupaten Deli Serdang
Abstrak: As an upstream and buffer areas, the ecological existence of forest and other protected areas have an important role in Deli Serdang district. Nowadays, forest and other protected areas has been degraded due to the increasing population and development activities. Without any effort to reduce the degradation, the problem will even more serious and give a worse impact in the future. A research that aims to : (1) analyze forest area and other protected area in accordance to biophysical condition that should be maintained; (2) formulate guidelines of land allocation of district according to biophysical condition; (3) analyze the possibility of improper use of protected area function in Deli Serdang district and (4) find out the indication of population pressure to protected area was carried out at Deli Serdang district. Data processing and analysis were done with GIS system through overlay operation of different themes of data. The result of analysis showed that the forest area that should be maintained were 50.009 ha (20,02 %). Identification of protected area based on Presidential Decree No. 32 year 1990 showed that 96,764 ha (38.74%) were the protected area, while the remaining 153,016 ha or 61.26 % were the cultivation area. In total, there were 34.95% of the protected areas which were used for production or cultivation. According to the analysis result, there were 312 villages which have population pressure more than 1 and 66.59% of those villages are in the protected area.
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Judul: Kajian kawasan lindung untuk penataan ruang yang ramah lingkungan
Abstrak: Increase of human population leads to the higher demand of land to accomodate human activities for their livelihood. On the other hand, land availability is limited. Consequently, if the need and availability of land are not balance properly, it will trigger conflict and competition between activities it self and land use. This will bring to a situation where shifting land utilization is not compatible to the regilation on spatial planning and their capacity. Therefore, spatial regional planning is needed to achieve balance between cultivation and preservation areas. Objectives of this research were: 1) to identify the preservation areas in Bogor District based on this bio-physical condition; 2) to analyze the spatial utilization discrepancy of preservation areas; 3) to analyze the population presure on preservation areas. The analysis was approach bt using Geographic Information System and applying criteria mentoned on the Presidential Decree Number 32 Year 1990 concerning Management of Preservation Areas. Population presure indocation was decided by the value of Population Presure Index. Analysis result based on that decree showed those areas which should be decided as preservation areas in Bogor District were 113,110 ha or 37.83% of the entrie district. The analysis result found that 20.99% of preservation areas based on the decree had been allocated as preservation areas on Bogor District Spatial regional Planning Year 2000-2010. th erest (79.01%) was not allocated based on that decree. The disrepancies were resulted because on map of Bogor District Spatial Regional Planning Year 2000-2010 had not allocated water catchments area, ;ocal preservation area and dangerous area. It was found that 61.98% of the preservation areas of analysis result based on the decree was under population presure (Population Presure Index >1). Therefore, some areas that have high population presure required alternative efforts to change attitude pattern of inhabitant that are expensive and exploitative to preservation areas. Those are application of application of policy on incentive-disincentive system, society empowerment and collaborative management on preservation araes among government, privates and society around preservation areas
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Judul: Pengaruh Iradiasi Microwave pada Sintesis Apatit Karbonat dari Cangkang Telur Ayam
Abstrak: The main inorganic constituent of human bone is carbonated-hydroxyapatite (CHA). This research aim to synthesis CHA by microwave assisted precipitation. Chicken eggshells calcined at 900oC for 8 hours to get CaO powder. CHA was successfully synthesized by mixing a calcium solution from chicken eggshells with an aqueous solution of NaHCO3 and H3PO4 using microwave irradiation. Microwave offers fast reaction, high yield, and high purity. Samples were irradiated in microwave oven for 30, 35, and 40 minutes with variation of power 40, 200 and 400W. There are fuctional groups of phosphate (PO43-), hydroxyl (OH-), and carbonate (CO32-). The FTIR spectrum indicates that the prepared sampe is B-type carbonated substituted HA because part of phospate groups in the HA sturucture is replaced by carbonated groups. The phase composition was evaluated by XRD and indicated the presence of HA and CHA. The successful synthesis of CHA is critical step forward in our efforts to fabricate bone tissue engineering scaffold.
Keyword: Biomaterial, CHA, Eggshells, Microwave