Judul: Identifikasi dan Pemetaan Tingkat Kekritisan Lahan di DTA Waduk Wonorejo dengan Menggunakan Sistem Informasi Geografis.
Abstrak: Lahan kritis menurut Undang-Undang Nomor 37 Tahun 2014 tentang Konservasi Tanah dan Air adalah lahan yang mempunyai fungsi kurang baik sebagai media produksi untuk menumbuhkan tanaman yang dibudidayakan atau yang tidak dibudidayakan. Lahan kritis yang terjadi di Daearah Tangkapan Air (DTA) Waduk Wonorejo berpotensi menyebabkan penurunan produksi pertanian, erosi, sedimentasi, banjir, kekeringan, pendangkalan sungai serta berkurangnya umur waduk. Penelitian bertujuan untuk mengidentifikasi dan memetakan parameter tingkat kekritisan lahan di DTA Waduk Wonorejo. Ketersediaan data dan informasi terbaru mengenai lahan kritis dapat membantu dalam penyusunan rencana penanggulangan lahan kritis dan memberikan preferensi pengelolaan yang tepat di DTA Waduk Wonorejo sehingga kelestarian ekosistem dapat terjaga. Penentuan tingkat kekritisan lahan berdasarkan Perdirjen BPDASPS Nomor P.4/VSet/ 2013 diidentifikasi dari beberapa parameter yaitu peta penutupan lahan, kemiringan lereng, tingkat bahaya erosi, produktivitas, dan manajemen lahan. Hasil penelitian yang diperoleh menunjukkan bahwa sebaran lahan kritis dan sangat kritis di DTA Waduk Wonorejo cukup luas yaitu 429.35 ha (17.15%) dan 641.83 ha (25.63%) dari luas DTA Waduk Wonorejo tanpa memperhitungkan kelas penutupan lahan awan, bayangan awan dan badan air.
Keyword: DTA Waduk Wonorejo, lahan kritis, sistem informasi geografis

Judul: Identifikasi dan Pemetaan Lahan Kritis dengan Menggunakan Teknologi Sistem Informasi Geografis dan Penginderaan Jauh (Studi Kasus di Sub DAS Cisadane Hulu, Kabupaten dan Kota Bogor, Provinsi Jawa Barat)
Abstrak: Watershed degradation in Indonesia is caused by population increase and land-use dan land cover changes. Cisadane watershed is the one of major watershed in which its areas situated across provincial boundary. The watershed is choosen as one of a priority watershed, which is need to be managed well. The purpose of this research are to identify the level of critical land, its area, to identify distribution in the sub watershed of Cisadane‟s upstream and to identify the causal factors of critical land. The research was held on April-October 2012 in the sub watershed of Cisadane‟s upstream. The critical land analysis was determinded by three areas function, thats are protected area, cultivation area, and the outside of protected forest area. The determining parameter of critical land are land cover, slope, erosion‟s risk level, land management, land productivity, and rock outcrops. The scoring value was added to each of parameter and overlayed to each area function. The result showed that the critical land of up stream part of sub watershed of Cisadane consist of several levels. The most severe critical land was about 107,67 hectares (0,25%), the critical area was 1.144,28 hectares (2,66%), and somewhat critical area was 3.177,70 hectares (7,38%), potential critical area mostly was 20.428,60 hectares (47,45%), and non-critical area was 1.612,83 hectares (3,75%). The potential critical land was distributed mostly at protected area (1784.10 hectares) and in cultivation area (726,99 hectares), especially at Caringin District. Whereas the most severe critical land was found at outside of protected forest area (66.61 hectares), especially in South Bogor District. The level of critical land in sub watershed of Cisadane‟s upstream caused by different factors. The causal factors of critical level at protected areas and outside of protected forest area were land cover, slope, erosion‟s risk level, and land management. Whereas the causal factors of critical land level at cultivation area are land productivity, slope, erosion hazard level, land management, and rock outcrops.
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Judul: In Vitro Release of Ibuprofen from Microcapsules Coated Polyblend of Poly(lactic acid) and Poly(ε-caprolactone)
Abstrak: Ibuprofen is an anti-inflammatory drug that has a short biological half-life and imposes adverse gastrointestinal reaction. Microencapsulation could be used to minimize its disadvantages. In this experiment, microencapsulation of ibuprofen was done by emulsification method. Coating material which was used were polyblend of poly(lactic acid) and poly(ε-caprolactone) which are biodegradable and biocompatible. Polyvinylalcohol was used as an emulsifier at concentrations of 1.5%. The microencapsulation was carried out with various quantities of ibuprofen. The increase in quantities of ibuprofen would improve encapsulation efficiency. Encapsulation of ibuprofen showed an efficiency of more than 71% with the highest score of 84.13% in microcapsule with ratio of polyblend-ibuprofen 5:1.5. The dissolution test results in basic medium showed that the encapsulation efficiencies affected ibuprofen release from the microcapsule. Microcapsules with the higest encapsulation efficiency released ibuprofen ranged from 26.71 to 28.78% for 6 hours. Kinetic of ibuprofen release followed first order kinetic model. The microcapsules particle sizes ranged from 38 to 250 μm.
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