Judul: Studi Karakteristik Habitat dan Biologi Katak Serasah Leptobrachium hasselti Tschudi 1838 di Situ Gunung, Sukabumi
Abstrak: Increasing development has caused the deterioration of amphibian habitat, including that of the leaf litter frog Leptobrachium hasselli. On the other hand, data and information on the bio-ecology of L. haselti is curentlyinsufficient. Therefore a study on the species ecology is required as the first step toward its conservation. This research aims to study habitat characteristics of L. haselti and the species biology in two different sites in Situ Gunung. Habitat data was collected using several methods. Transect was used in vegetation composit analysis. Canopy cover, leaf litter depth and air temperature was measured in each plot, while air teperature and humidity was measured at the start and end of each survey . L. hasselti population was sampled using 4x4 m plot placed perpendicular to each bodis of water. Each plot was classified according to its distance from the water bodies to study the distribution and density of each sex species (males, females and juveniles). L. haselti diet and reproduction biology was studied with a sample of 50 frogs consisting of 18 males and 12 females.
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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: Sintesis Nanorod Seng Oksida (ZnO) dengan Metode Sonokimia
Abstrak: Gelombang ultrasonik telah digunakan untuk membantu sintesis ZnO. ZnO terbentuk dari campuran ZnAc dan NaOH. ZnO disintesis dengan variasi konsentrasi ZnAc 0.5 M ( ZnO 1:1 ) dan 1.5 M ( ZnO 3:1 ) yang dicampurkan dengan NaOH konsentrasi 0.5 M. Sampel yang diporoleh dikarakterisasi dengan XRD dan SEM. Karakterisasi difraksi sinar-X menunjukkan bahwa struktur kristal ZnO yang dihasilkan merupakan heksagonal dengan pertumbuhan yang dominan pada orientasi bidang nonpolar a dengan indeks hkl 101. Kristalinitas dan kemurnian kristal ZnO 1:1 lebih baik dibandingkan ZnO 3:1 ditunjukan dengan intensitas puncak difraksi sinar-X yang lebih tinggi, sempit dan tajam. Untuk ukuran kristalit ZnO 1:1 mempunyai rata-rata ukuran kristalit 30.57 ± 4.31 nm sedangkan ZnO 3:1 mempunyai ukuran rata-rata 20.25 ± 7.12 nm. Dari ukuran kristal yang terbentuk partikel ZnO termasuk nanokristal. ZnO 1:1 terbentuk batang-batang nano (nanorods) sedangkan pada ZnO 3:1 tidak terbentuk batang-batang nano (nanorods). Untuk ukuran morfologi, ZnO 1:1 mempunyai rata-rata ukuran butiran kristal 230 nm dan lebih besar dibandingkan ukuran ZnO 3:1 yang mempunyai rata-rata ukuran butiran kristal 50 nm.
Keyword: nanorot, sintesis, sonokimia, ZnO