Judul: Mapping the Suitable Habitat for Rafflesia patma Blume in Cagar Alam and Taman Wisata Pangandaran
Abstrak: Rafflesia patma is one of rare and protected plant species and therefore it should be conserved. Unfortunately, its spatial distribution and non spatial habitat information have not been documented. Due to this facts, it is an urgent needed to map its habitat suitability. This objectives can be achieved by using the Geographical Information System and Remote Sensing Tecnology. The aim of the research is mapping suitable habitat for R. patma based on the physical variables such as altitude, slope, distance from river, soil type and Leaf Area Index (LAI)
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Judul: Pemetaan Kesesuaian Habitat Rafflesia Patma Blume  Di Cagar Alam Leuweung Sancang  Garut Jawa Barat
Abstrak: Rafflesia patma Blume is holopharasite and dioceous plant. Holopharasite means that it is completely dependent on the host plant for its nutrition and survival. Dioceous means having male and female flowers borne on separate plants. R.patma is Javan endemic plant. One of habitat R.patma is Leuweung Sancang Nature Reserve. R.patma prereservation could be done by suitability habitat mapping. The research was aimed to map suitable habitat of R.patma in Leuweung Sancang Nature Reserve. The research was conducted at Leuweung Sancang Nature Reserve on August 2008. Analysis were conducted on October 2008 until December 2008. The research used 5 physical habitat variable such as altitude, slope, distance from river, soil, LAI (Leaf Area Index) and soil classification. Map analysis was ArcView 3.2 and Erdas Imagine 9.1,mean while LAI analysis was calculated by using Hemiview. Weighting were conducted by using determined used Principle Component Analysis. There were two principle component with total initial eigenvalues 3,077 and 1,148. Physical habitat factor that gave significant effect on habitat suitability model were distance from river and soil classification. The model which was used to determine the habitat suitability in Leuweung Sancang Nature Reserve was Y = (3,077xFk1) + (3,077xFk2) + (1,148xFk3) + (1,148xFk4) +(1,148 x Fk5). The habitat suitability map were reclassified into three class, high, medium and low suitability. The result showed that were 324,373 hectares of high suitability habitat, 1701,435 hectares of medium suitability habitat and 692,893 hectares of high habitat. The habitat suitability map could be accepted by showing the validation about 93% for the high habitat suitability.
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Judul: Karakteristik Carboxymethyl Chitosan Dengan Variasi Konsentrasi NaOH
Abstrak: Carboxymethyl chitosan is chitosan derivative product obtained from chemical modification. CMCh were made by alkalization process and carboxymethylation process. Factors that affect CMCh characteristics were excess sodium hydroxide in alkalization process, ratio between chitosan and monochloroacetic acid, and carboxymethylation temperature. The objectives of this research were to study the NaOH effect to CMCh characteristics, to learn process of making CMCh, to set the proper concentration of NaOH, and to analyze CMCh characteristics. CMCh yields were 110.72%-114.22%. CMCh pH value were 3.74-4.31. The optimum NaOH concentration to obtain the best CHCh was 10 M. Percentage of CMCh moisture content was 10.70%-11.42%. Ash content and nitrogen content of CMCh were 0.49%-0.50% and 4.52%-4.81%. CMCh viscousity was 8.25 cps. Percentage of CMCh solubility was 61.61%-91.50%. The different functional groups from chitosan which observed in CMCh were C=O group, CH group from alkene functional group, C−O group, and C−O−C group.
Keyword: solubility., functional group, CMCh characteristics, chitosan, carboxymethyl chitosan