Judul: Taxonomic Evaluation of Leptobrachium hasseltii (TSCHUDI) based on Morphological, Acoustic, and Molecular Analysis
Abstrak: Leptobrachium from Southeast Asian populations was first described as Leptobrachium hasseltii Tschudi with type species from Java. Taxonomic reassessment revealed that the Leptobrachium group was a cryptic species due to similarities in their morphological appearance. Leptobrachium hasseltii is then separated into two groups; Sumatran and Javan populations, and Bali populations. Thus, this study aims to evaluate the taxonomic status of L. hasseltii based on morphological characters, bioacoustic and molecular analyses on the populations of Sumatera, Java, and Bali. I analyzed the morphological data, bioacoustic and phylogenetic analyses of L. hasseltii populations from Sumatera, Java, and Bali to evaluate their exact taxonomy position. The genetic material used is mitochondrial DNA gene sequences 16S rRNA. Phylogenetic trees are reconstructed using Maximum Likelihood (ML) and Bayesian Inference (BI) analyses. I used Leptobrachium specimens stored in the Museum Zoologicum Bogoriense (MZB). Approximately 21 morphological characters were measured with digital calipers and an ocular micrometer with a precision of 0.01 mm. Advertisement call characteristics from each population are described, including series of the call, the number of notes per call, note repetition rate, and characteristics of each note. Phylogenetic results shoId Leptobrachium sp. from Bali was separated from all the Sumatran and Javan populations, this result is supported by morphometric data, which its cluster clearly separated from other populations, and its also supported by bioacoustic results, which have a significantly different character. Here I confirmed the possibility of new species Leptobrachium, by combinations of phylogenetic relationship, morphological and morphometry, and bioacoustic analyses.
Keyword: Leptobrachium, taxonomy, phylogenetic, morphology,, bioacoustic

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: Sintesis Nanopartikel ZnO dengan Stabilisator Nonilfenol Etoksilat dan Aplikasinya sebagai Pigmen Coating Antikorosif
Abstrak: Zink oksida (ZnO) merupakan material yang telah lama digunakan dalam industri cat organik karena memiliki sifat yang ramah lingkungan. Nanopartikel ZnO disintesis dengan metode presipitasi dengan tambahan surfaktan nonilfenol etoksilat sebagai stabilisator. Pencirian dengan difraksi sinar X menunjukkan keberadaan puncak-puncak khas yang serupa dengan partikel ZnO dalam keadaan curah dengan ukuran dimensi 18-50 nm. Nanopartikel ZnO sebagai inhibitor korosi mampu meningkatkan kinerja cat dalam menghambat terjadinya korosi. Efektivitas inhibisi korosi cat dengan nanopartikel ZnO mencapai 99.13% pada komposisi nanopartikel 3% dengan aplikasi cat 6 lapis. Peningkatan komposisi nanopartikel ZnO dalam cat yang berlebih dapat memengaruhi sifat fisik cat dalam hal kekasaran dan rendahnya elastisitas coating.
Keyword: antikorosif, nanopartikel ZnO, surfaktan nonilfenol etoksilat, surfaktan nonilfenol etoksilat