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: Dukungan Masyarakat Lokal dan Habitat untuk Konservasi Owa jawa (Hylobates moloch, Audebert, 1798) di Resort Bodogol Taman Nasional Gunung Gede Pangrango
Abstrak: The Javan gibbon (Hylobates moloch Audebert, 1798)), found in Western Java, is one of the rarest and most endangered hylobatids. The role of local community on natural resource management and wildlife conservation in national parks, particularly in Mount Gede Pangrango (Resort Bodogol), is of vital importance. The aims of the study were to analyze the community activities conducted for the population of H. moloch, predict population growth for H. moloch and identify the use of habitat by H. moloch. The study was analyzed descriptively using data collected by questionnaires as well as field observation. Purposive Sampling technique was used to collect data from 100 respondents. The results showed that only 25% of them were active participants regarding conservation of H. moloch. The population of H. moloch consisted of 13 groups with 39 individuals which are 13 adult males and 14 adult females, 5 sub adult males, 4 sub adult females and 3 infantiles. The average population density was estimated at 27 animals/km2, the standard error of 2,61, with coefficient of variance 6,69%.The group studied was composed of one adult male, two adult female, two subs adult and one infant. The results from Focal Animal sampling method within five minutes interval showed that the time proportion of group activities consisted of feeding (33,06%), moving (10,87%), resting (36,26%), calling (4,32%) and social activities (15,45%). The value of sex ratio is 1:1,25 for sub adult, while the value of adult sex ratio was 1:0,92. Both of the sex ratio closes to 1:1. The rate of natality is 0,21, while the mortality rate cannot be calculated due to the lack of direct observation and time constraint. It is found that the diversity of plant species in habitat, consisted of 77 species from 27 families. Keywords: Javan gibbon, habitat, conservation, Bodogol
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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