Judul: Aktivitas Makan, Kuantitas dan Kualitas Pakan Pada Bekantan (Nasalis larvatus) yang Diberi Berbagai Jenis Pakan di Taman Safari Indonesia
Abstrak: Proboscis monkeys (Nasalis larvatus) are primate that live in groups on trees and consume leaves. The consumption of leaves is done by proboscis monkeys in their feeding activities. The feeding activities of proboscis monkeys relates to the fulfillment of their daily energy. The energy is needed for the continuity of the group existence. The feeding activities of proboscis monkeys have several activities. They are observing, taking, checking, processing, biting, chewing, ingesting, pulling out the feed from their mouth and disposing the feed. The quantity of food that consumed determines the sufficience amount of nutrient needed. This study aimed to assess the feeding activities, the feed quantity and the quality of proboscis monkeys (N. larvatus) which are given many kinds of food items in Taman Safari Indonesia. The data collection for the feeding activities was performed using ad libitum and focal animal sampling methods. The feeding activities were observed for 46 days since June until July 2009, 6 hours a day with total of 276 hours observations. The percentages of the eating activities of Boki (the adult male), Ayu and Chintya (the adult females) and Kia, Nakula, Pretty (the infants) were 34,15%, 29,92%, 30,91%, 11,13%, 7,69%, and 7,36% respectively. The chewing and pulling out the feed from their mouth on adult male, adult females and infants were the largest and the smallest percentage of the feeding activities (57,14%, 60,31%, 63,71%) and (1,55%, 2,47%, 1,95%). While, the adult male revealed the greatest percentage of regurgitation (57,06%). Proboscis monkeys have good palatability in type of bean. The result of the study revealed that the monkeys have sufficient dry matter and protein consumption (48,82 g/BB/h, 89 g/BB/h and 5,76 g/BB/h, 10,50 g/BB/h), but less for fat and energy (1,06 g/BB/h, 2 g/BB/h and 115,88 kkal/BB/h, 211 kkal/BB/h), while nutrient recommended.
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Judul: Aktivitas Makan dan Status Gizi Lutung Perak (Trachypithecus cristatus) di Pusat Primata Schmutzer, Taman Margasatwa Ragunan, Jakarta
Abstrak: Silvered leaf monkeys (Trachypithecus cristatus) are primate that live in groups on trees and consume leaves. The feeding activities of silvered leaf monkey relates to the fulfillment of their dialy energy. The energy is needed for the continuity of the group existence. The feeding activities of silvered leaf monkeys have several activities. They are observing, taking, sorting, processing, biting, chewing, ingesting, pulling out their mouth, and disposing the feed. The study aimed to identify the feeding activities, kind and composition of feed, nutrient consumption and energy of silvered leaf monkeys (Trachypithecus cristatus) in Schmutzer Primate Center (PPS), Ragunan Zoo, Jakarta. Data is collected from June to September 2011 with total of 480 hours observations. The data collection for the feeding activities was performed using ad libitum and focal animal sampling methods. Based on the observations, there were three types of activities with the highest frequency. Such as resting, locomotion, and feeding activity at 44.87%, 40.89%, and 38.70%. Respectively the chewing feed activities on infants were the higest of the feeding activities (36.90%). Silvered leaf monkeys in Schmutzer Primate Center (PPS) have good palatability in type of lamtoro leaves (Leucaena glauca). The result of the study revealed that adult and infants monkeys have sufficient dry matter and protein consumption (40,5 g/BW/d, 8 g/BW/d and 63 g/BW/d, 12,5 g/BW/d), but less for fat and energy (2,37 g/BW/d, 23,87 kcal/BW/d and 3,75 g/BW/d, 37 kcal/BW/d), while nutrient recommendation
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Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition