Judul: Kondisi Habitat dan Sebaran Rafflesia rochussenii di RPH Legokherang KPH Kuningan Jawa Barat
Abstrak: Rafflesia rochussenii merupakan spesies yang langka dan dilindungi pemerintah. Spesies tersebut ditemukan di Kuningan Jawa Barat yang merupakan distribusi baru di luar kawasan konservasi. Penelitian ini bertujuan mengidentifikasi kondisi habitat R. rochussenii dan sebarannya di RPH Legokherang, KPH Kuningan, Jawa Barat. Penelitian dilakukan pada bulan Februari-Maret 2020. Metode yang digunakan adalah purposive sampling dengan petak tunggal seluas 0.1 ha. Selain itu, studi literatur sebagai data penunjang. Hasil penelitian ditemukan sebanyak 29 individu R. rochussenii, kelas diameter kuncup yang paling besar yaitu 6.1-7cm. Spesies inang yang digunakan adalah Tetrastigma leucostaphylum dan spesies yang mendominasi adalah Oreocnide rubescens. Ditemukan sebanyak 6 spesies fauna dari 5 ordo yang beraktivitas di sekitar habitat R. rochussenii. Habitat R. rochussenii berada pada tipe hutan dataran rendah dengan ketinggian 536-594 m dpl dan kemiringan 77-87%, jenis tanah laterit merah dengan pH 5 dan suhu ratarata sebesar 26.5°C. Sebaran R. rochussenii di RPH Legokherang ditemukan sebanyak 3 titik. Belum adanya upaya yang dilakukan pengelola kawasan terhadap perlindungan kelestarian R. rochussenii dan habitatnya.
Keyword: Kata kunci: habitat, Rafflesia rochussenii, sebaran, Tetrastigma leucostaphylum.

Judul: Habitat Characteristics of Rafflesia rochussenii Teijsm. et Binn. in Cimande Resort, Gunung Gede Pangrango National Park
Abstrak: Rafflesia rochussenii is a rare and protected plant species. This species is found in Cimande Resort, Gunung Gede Pangrango National Park, Bogor, West Java. The purpose of this study is to describe the habitat characteristics of Rafflesia rochussenii in Cimande Resort, both biotic and abiotic components, and to explain its management program. The method used is purposive sampling with circular plots with a radius of 17.8 m. Literature study was done to find supporting data. Results identified 57 Rafflesia individuals were found consisting of alive and dead flowers as well as alive and dead buds. The host was Tetrastigma leucostaphylum. The dominating species at the tree, sapling, seedling and undergrowth level were Schima wallihcii, Castanopsis acuminatissima, Aspnlenium nidus, and Cinchona pubescens, respectively. Six species of animals were identified. Rafflesia habitat is found in the altitude of 840-1,360 masl, a slope of 10% -88%, average temperature of 19°C and relative humidity ranging from 80-90%. Soil pH ranges from 5-6.5, soil color is reddish brown to yellow. Leaf Area Index value ranges from 1.85-2.11. Management done by the National Park is inventory and monitoring.
Keyword: abiotic, biotic, habitat, Rafflesia rochussenii

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4