Judul: Pemetaan kesesuaian habitat Rafflesia zollingeriana Kds: studi kasus di Resort Sukamade Wilayah Seksi I Sarongan Taman Nasional Meru Betiri Jawa Timur
Abstrak: The natural habitat of Rafflesia zollingeriana Kds is in Meru Betiri National Park (TNMB). Rafflesia zollingeriana Kds breeding habitat is determined by several factors such as: host plants, vegetation types, animal pollinators and seed dispersal, climate, wind, soil, topography and human activity and the manager (Zuhud et al. 1998). Based on these factors, the habitat models of Rafflesia zollingeriana Kds can be developed in order to measure the level of habitat suitability in the Meru Betiri National Park. Data collection was conducted at the Resort Sukamade SPTN I Meru Betiri National Park during December 2009 - January 2010. Furthermore, the data processing was conducted in June 2010 until February 2011. This study used six physical variables: altitude, slope, distant from river, soil, rainfall, and Normalized Difference Vegetation Index (NDVI). The map processing has been done using Erdas Imagine 9.1 and ArcGIS 9.3, whereas the attribute tables were processed using Microsoft Excel 2007 and SPSS 19.0. The Principal Component Analysis (PCA) was used for determining the weight of the model. Based on Principal Component Analysis, there are 3 main components with eigen value of 2.025, 1.635 and 1.019. The physical variables that have most influence on habitat suitability model are rainfall and NDVI. The habitat model of R. zollingeriana follows: Y = (1.019 × distance from river) + (2.025 × NDVI) + (1.635 × height) + (1.019 × slope) + (1.635 × soil group) + (2.025 × rainfall). Habitat suitability map is divided into 3 classes: high suitability, medium suitability and low suitability. The area of high suitability habitat is 6131.8 ha, medium suitability habitat is 2883.88 ha, and low suitability habitat is 139.418 Ha. Habitat suitability maps can be accepted by the validation value 60% for high suitability class.
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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: Penyalutan Nanotube Paduan Logam Ti6Al4V dengan Komposit Hidroksiapatit-Gelatin-Polivinil Alkohol Menggunakan Metode Dip-Coating.
Abstrak: Paduan logam Ti6Al4V digunakan sebagai bahan implan karena sifatnya kuat, ringan, dan tahan korosi. Permukaan paduan logam perlu dimodifikasi untuk meningkatkan ketahanan terhadap korosi. Penelitian ini bertujuan memodifikasi permukaan paduan logam Ti6Al4V membentuk struktur nanotube serta menyalutkan komposit hidroksiapatit(HAp)-gelatin-PVA pada paduan logam Ti6Al4V. Nanotube dibentuk melalui metode anodisasi dalam larutan etilena glikol-H2O (9:1) yang mengandung NH4F 0.6% pada tegangan 20 V selama 3 jam. Hasil pencirian mikroskop elektron payaran menunjukkan diameter lubang nanotube sekitar 30−40 nm dan terbentuk secara homogen. Hasil penyalutan paduan logam nanotube merata dan lebih tebal. Morfologi komposit penyalut berbentuk granula kecil yang homogen. Difraksi sinar-X menunjukkan bahwa ukuran kristal komposit HAp-gelatin-PVA yang tersalut pada paduan logam nanotube lebih kecil dibandingkan dengan non-nanotube. Nanotube paduan logam Ti6Al4V yang tersalut dengan komposit HAp-gelatin-PVA memiliki bioaktivitas yang kurang baik sehingga belum dapat meningkatkan ketahanan korosi paduan logam Ti6Al4V.
Keyword: anodisasi, gelatin, hidroksiapatit, nanotube, Ti6Al4V