Judul: Ekologi Morel Rinjani (Morchella aff. deliciosa) di Taman Nasional Gunung Rinjani-Nusa Tenggara Barat
Abstrak: Ecologically based information on Rinjani morel mushroom (Morchella aff. deliciosa) habitat is needed to determine decision making by park manager for its conservation. The study was taken to describe and identify the ecological factors that correlate with the presence of the fruitbodies of M. aff. deliciosa. Fourteen plots (10m x 10m) with morel fruitbodies and twenty one plots without morel fruitbodies at higher level of altitude were established accidentally for measurement of climatic, soil, and trees variables during morel fructification. Data were described statistically and analyzed using multiple linear regression and discriminant analysis. The research result showed that fructification of M. aff. deliciosa appeared at level of altitude 1572,00-1609,00m, slope between 7,94- 54,00%, aspect between 4,00-360,00o. The lifespan of morel fruitbodies between 15-20 days. The air temperature range of 18,53 - 19,6oC and 83,00 - 90,50% humidity on the forest floor measurement, light between 490,00-620,00lux. Brown Mediterran loam soils supported the morel fruiting, pH neutral (7,0), medium C/N ratio (12,16), low P (12,53ppm) and medium Ca (10,22me/100g). Anomianthus auritus, Syzygium polyanthum, Weinmannia sp., Uropyhllum macrophyllum, and Piper sp. were identified as dominant tree species. The values of Shannon-Wiener index obtained for site with morel and site without morel tested using t test (Levene’s test) showed there is no difference in tree diversity between the two locations. The Morisita–Horn index also showed that similirity indices between the two locations is about 83,40%. The research result indicated that morel started to fruit when the humidity begin to slow for some short period and stopped to fruit until humidity constant relatively. The multiple linear regression analysis showed that light was the only ecological factor correlated significantly with the number of morel fruitbodies. Meanwhile the t test showed there was significantly different ecological components between the morel site and the site without morel i.e the temperature, forest floor moisture, light intensity and altitude factor. This information on the nature M. aff. deliciosa habitat provides the first step in succesfull management and conservation of morel and other mushroom resources.
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Judul: Population Characteristics and Potential of Bioprospecting Keruing Gunung (Dipterocarpus retusus Bl.) in the National Park of Mount Rinjani, NTB
Abstrak: Taman Nasional Gunung Rinjani (TNGR) memiliki flora bernilai ekonomi tinggi, yaitu keruing gunung (Dipterocarpus retusus Bl.). Keruing gunung merupakan tumbuhan dengan habitus pohon yang berasal dari famili Dipterocarpaceae. Masyarakat sekitar hutan TNGR belum memanfaatkan potensi tumbuhan tersebut kecuali sebagai bahan bangunan dan kayu bakar. Penelitian ini bertujuan menganalisis vegetasi berupa semai, pancang, tiang, dan pohon. Selain itu, menguji ekstrak yang paling aktif sebagai antibakteri dan menguji kandungan kelompok metabolit sekunder pada ekstrak teraktif tersebut., The National Park of Mount Rinjani (TNGR) is a flora of high economic value, namely keruing gunung (Dipterocarpus retusus Bl.). Keruing gunung is a plant with habitus trees originating from Dipterocarp family. Forest communities TNGR have not take the advantages of these plants potential yet exceptas building material and firewood. The aim of this study to found the most active extracts which tested as antibacterial and to determine the content of secondary metabolites group on the most active extracts, and also to analyze the vegetation of seedlings, saplings, poles and trees.
Keyword: Conservation, bioprospecting, TNGR, Dipterocarpus retusus Bl.

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition