Judul: Morphometric Variation Of Genus Dobsonia (Mammalia, Pteropodidae) From Indonesian Papua
Abstrak: Based on 176 specimens and 32 characters of Dobsonia from Indonesian Papua, the study on their morphometric variation of Dobsonia were carried out. The specimens represented six OTUs, i.e G, B, R, E, SP1, and SP2. Univariate analysis computed all of adult specimens that consist of 171 external and wing characters and 176 skull and teeth characters on six OTUs. PCA and T test analysis computed to G, B, and R, whereas three OTU of them were projected in scatter plot. The results showed there are sexual dimorphism in D. minor and D. beauforti based on T test (p<0.05). The PCA was separated D. magna, D. minor, D. beauforti were significant on body, wing and teeth characters. D. emersa separated from other species on body and skull characters. SP1 and SP2, however, they can not be diagnosed separately from D. beauforti. The characters that can be used as taxonomical characters of Dobsonia are WT, HB and TV for body characters; FA, TIB, and DIG1P for wing characters; ONL, POW, PL, and MH for skull characters; I2M2, M2M2, WM1 and LM1 for teeth characters. D. minor that found at Waigeo island in 2007, formerly it found only in Papua mainland and Yapen Island.
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Judul: Daemonorops fissa Complex in West Malesia
Abstrak: Daemonorops fissa complex is highly varied in West Malesia, but information about this complex is limited. The objective of the research was to reveal species diversity of Daemonorops fissa complex in West Malesia based on morphological and anatomical characters. Evaluation of morphological characters was conducted in Herbarium Bogoriense (BO) Cibinong Science Centre LIPI, Bogor (West Java). A total of 355 herbarium specimens were observed in this study representing all species of Daemonorops fissa complex. This study explored Daemonorops fissa complex, including the following: 1) species diversity, (2) distribution, (3) morphological variation, (4) anatomical variation and (5) phenetic relationships. Data obtained then was analized descriptively and phenetically. Species of Daemonorops fissa complex in West Malesia share some unique characters such as erect peduncle (to ± 2 cm), alternate leaves, length of involucrum 1 cm, globose fruits, and ruminate endosperm. This complex species consists of eight species namely, D. angustifolia, D. calicarpa, D. fissa, D. grandis, D. lewisiana, D. melanochaetes, D. monticola, D. stenophylla. Daemonorops binnendijkii, D.palembanica and D. trichroa proposed as new synonymies. Daemonorops binnendijkii and D. trichroa are new synonyms to D. angustifolia, and D. palembanica is a new synonym to D. melanochaetes. All species found in lowland rain forest, especially along stream and other wet places or more open areas, swampy area, ridgetop hill Dipterocarp forest, bamboo forest, and river side on altitude from 250 m – 1900 m asl. Morphological variation of Daemonorops fissa complex in West Malesia could be differentiated into 20 morphological characters. Cluster analysis separated all species into two main groups with coefficient similarity of 36%. Group I consisted of D. angustifolia, D. fissa, D. grandis, D. melanochaetes, D. monticola and D. stenophylla, while group II consisted of D. calicarpa and D. lewisiana. They were separated from five characters, total height, number of leaflets, width of leaflets, type of inflorescence and type of spine in leafsheath. Leaf anatomical characters of paradermal section could not be used to separate among species within D. fissa complex, but leaf anatomical characters of transverse section could be used to identify among species. All examined species of D. fissa complex have three similar characters, tetracytyc stomata, cryptopor type with sunken position and cell wall of sinous, but they have different pattern of bulliform cell and palisade tissues. Both characters are considered as two valuable new characters for supporting morphological data for species delimitation.
Keyword: anatomy, Daemonorops fissa complex, morphology, West Malesia

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