Judul: Pola Ekologi Owa Jawa Liar (Hylobates moloch) di Pulau Jawa, Indonesia: Efek Faktor Lingkungan
Abstrak: The geographical (latitude, longitude, and altitude) and environmental variables (rainfall and temperature) would be important constraints on forest structure, food abundance, other resources’ distribution and availability. These can affect dietary habits, behavior, and dayly travel distance. This study aims to examine environmental determinant(s) of behavioral and social aspects of Javan gibbons through meta-analysis. This study compiled previous publications about gibbons through database searching. Employed statistical analyses were Spearman’s rank correlation and Kruskal-Wallis tests. The results showed that there were no significant correlations between geographical/environmental variables and behavioral/social aspects, except for relationship with latitude and number of animals per group. This study also found no significant differences in behavioral/social aspects among forest types.
Keyword: Activity budget, dietary composition, forest types, gibbons, latitude, Activity budget, dietary composition, forest types, gibbons, latitude

Judul: Faktor-Faktor yang Memengarahui Perubahan Perilaku Owa Jawa (Hylobates moloch, Audebert 1798) di Taman Margasatwa Ragunan Jakarta
Abstrak: Javan gibbon (Hylobates moloch Audebert, 1798) is one of the animals with Endangered conservation status according to the IUCN. One of the conservation activities at the Schmutzer Primate Center, Ragunan Wildlife Park, is breeding the Javan gibbon. the Covid-19 pandemic was an event that affected the behavior of the Javan gibbon but there is no data on the behavior of the Javan gibbon after the pandemic ended. The purpose of this study was to describe the behavior of the Javan gibbon after the Covid-19 pandemic, to identify differences in the behavior of the Javan gibbon during and after the Covid-19 pandemic, as well as the factors that influenced the behavior of these animals. The research was conducted from January to March 2023 at TMR. Behavioral data collection method with instantaneous scan sampling. The results data obtained after the Covid-19 pandemic showed 3 new behaviors during the post-Covid-19 pandemic: shelter-seeking, agonistic and sex. The frequency of moving behavior after the Covid-19 pandemic had the highest percentage, while during the Covid-19 pandemic, the behavior of resting had the greatest frequency. Factors that influence the behavior of the Javan gibbon include the size of the cage, the weather, and the presence of visitors.
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Judul: Sintesis nanopartikel Cu2ZnSnS4 menggunakan teknik hidrotermal
Abstrak: Nanopartikel Cu2ZnSnS4 (CZTS) merupakan semikonduktor yang berpotensi sebagai fotokatalis untuk reaksi fotodegradasi zat pewarna. Semikonduktor ini memiliki sela pita yang jauh lebih kecil dibandingkan dengan semikonduktor TiO2, sehingga memungkinkan dapat berkerja hanya dengan paparan sinar matahari. Nanopartikel Cu2ZnSnS4 telah berhasil disintesis menggunakan teknik hidrotermal dengan suhu 200 oC selama 24 jam. Larutan Cu2ZnSnS4 dinetralkan menggunakan amonium hidroksida dan dialiri gas N2 sebelum proses hidrotermal. Hasil analisis mikroskop elektron pemayaran menunjukkan nanopartikel Cu2ZnSnS4 mengalami aglomerasi karena memiliki ukuran partikel yang besar. Hasil analisis difraktogram sinar-X menunjukkan bahwa Cu2ZnSnS4 yang dihasilkan memiliki struktur kesterit dengan senyawa fase sekunder yang terbentuk adalah CuS, ZnS, dan Cu2SnS3. Hasil uji fotodegradasi menunjukkan bahwa senyawa hasil sintesis memiliki kemampuan degradasi dibawah sinar matahari lebih baik dibandingkan dengan TiO2. Namun, pada paparan sinar UV, TiO2 mendegradasi biru metilena lebih baik daripada senyawa hasil sintesis. Kapasitas adsorbsi terhadap biru metilena sebesar 2.6780 mg/g menunjukkan bahwa senyawa hasil sintesis tidak mampu mengadsorpsi dengan baik, sehingga disimpulkan bahwa hilangnya biru metilena dari larutan disebabkan oleh fotodegradasi, bukan oleh adsorpsi
Keyword: band gap, Cu2ZnSnS4, kesterite, photocatalyst, semiconductor