Judul: Karakteristik Habitat Lutung Jawa di Resort Bandealit, Taman Nasional Meru Betiri
Abstrak: Taman Nasional Meru Betiri merupakan salah satu habitat lutung jawa (Trachypithecus auratus) di Resort Bandealit. Tujuan penelitian yaitu mengidentifikasi karakteristik habitat yang digunakan lutung jawa. Penggunaan habitat lutung jawa diketahui melalui pengamatan aktivitas harian dengan metode focal animal sampling dengan time series dan dilakukan analisis vegetasi. Karakteristik habitat lutung jawa dicirikan oleh area yang memiliki rata-rata tinggi pohon 16.6 m dengan bentuk tajuk seperti payung yang digunakan sebagai sumber pakan dan tempat berlindung. Aktivitas harian lutung jawa pada setiap kelas umur memiliki alokasi waktu yang berbeda pada setiap lokasi pengamatan. Alokasi waktu aktivitas tertinggi pada anak adalah sosial, remaja adalah makan, jantan dewasa adalah istirahat dan betina dewasa adalah sosial. Lutung jawa menggunakan semua tipe habitat dengan proporsi yang sama.
Keyword: aktivitas harian, karakteristik habitat, lutung jawa

Judul: Studi Habitat Lutung Jawa (Trachypithecus auratus E. Geoffroy 1812) di Resort PTN Cimande, Taman Nasional Gunung Gede Pangrango
Abstrak: Lutung jawa (Trachyppithecus auratus) adalah primata endemik Indonesia yang termasuk kategori rentan dalam IUCN. Keberadaan lutung akan tetap berlanjut dengan tersedianya habitat yang baik, sehingga informasi mengenai kondisi habitat lutung jawa diperlukan untuk pengelolaan habitat yang lebih baik. Penelitian mengenai habitat lutung jawa bertujuan mengidentifikasi komponen-komponen habitat, mengidentifikasi jenis tumbuhan pakan dan bagian yang dimakan, serta mengukur ketersediaan tumbuhan pakan. Penelitian dilakukan pada bulan Maret 2024 di RPTN Cimande, Taman Nasional Gunung Gede Pangrango. Data penelitian didapatkan dengan melakukan observasi lapang dan pengukuran di lapangan. Hasil penelitian menunjukkan bahwa lutung dapat dijumpai pada ketinggian 684-884 mdpl dengan kelerengan 0%-45%. Jenis tumbuhan yang sering dikonsumsi lutung ialah teureup, ki bolong, dan kayu afrika, dengan perbandingan bagian tumbuhan yang dimakan yakni 58,82% daun dan 41,18% buah. Keberadaan tumbuhan pakan mendominasi pada habitat lutung jawa, sehingga ketersediaannya dapat dikatakan melimpah. Selama penelitian dijumpai primata selain lutung jawa yakni monyet ekor panjang, surili, dan owa jawa, namun tidak teramati terjadinya konflik antar primata., Javan langur (Trachypithecus auratus) is an endemic primate in Indonesia that is categorized as vulnerable by IUCN. The existence of langurs will continue with the availability of suitable habitat, so information regarding the habitat conditions of javan langurs is needed for better habitat management. Research on javan langur habitat aims to identify habitat components, types of food plants and the parts they eat, and measure the availability of food plants. The research was conducted in March 2024 at RPTN Cimande, Gunung Gede Pangrango National Park. Research data were obtained by conducting field observations and measurements in the field. The research results show that langurs can be found at an altitude of 684-884 meters above sea level with a slope of 0%-45%. The plants often consumed by langurs are teureup, ki bolong, and kayu afrika, with the ratio of plant parts eaten being 58,82% leaves and 41,18% fruit. Food plants dominate the javan langur habitat, so their availability is abundant. During the research, primates other than javan langurs were found, namely long-tailed monkey, surili, and javan gibbon, but no conflict between primates were observed.
Keyword: food plants, habitat, javan langur

Judul: The Isolation of Silver (Ag) from Fixer Sludge with Electrolysis methode
Abstrak: with the variations concentration, electrode of carbon, and voltages. The aim of research are looking for the easiest and eficient electrolysis. Among of 272.79 ppm of silver (impurities) could be produced from electrolysis fixer which used 300 times maintain the film. For 400, 500, and 600 times electrolysis were produced recently 49.42, 137.04, and 55.22 ppm. Futhermore, it was increased to 220.00 ppm from 700 times. These were possible because of density the solutions. From the electrode of carbon, 68.2222 g Ag (impurities) could be processed from size 14 cm x 3 cm x 3 cm. The next results 41.2050 g and 43.7559 g from the sizes 16 cm x 3 cm x 3 cm and 18 cm x 3 cm x 3 cm. The reasoned of this part any faster reaction on the most litle electrode. By the way, from voltages variation, the processed showed that 47.4575 g of Ag (impurities) could be produced from 11 volt. It’s caused the bigest voltages are also the bigest kinetics power on the reactions. Sampel and product were analized by AAS. Consentration has potential to be indicator, because of the used 700 times was given trend high Ag (impurities) became increase optimally at 11 volt, and much sediment that is 47.4575 g. The best rendemen is 13.33%. The other finding is that the strength of the time and the voltages strongly enfluence the electrolysis shown by the bigger result on F(calculation) than that of the F(table).
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