Judul: Eksplorasi Bakteri dan Aktivitas Enzim Pencerna Selulosa, Amilosa, dan Lipid di Dalam Sekum Landak Jawa (Hystrix javanica).
Abstrak: Porcupine is a wild animal that has been protected by the goverment because of a decrease in it’s population. There are many factors affecting the decrease in porcupine population : illegal hunting for human consumption due to low colesterol content in its meat or for traditional medicine to cure some diseases. Porcupine meat is believed to improve male stamina and cure various diseases. Porcupine meat quality is influenced by feeds that are consumed and digested. Porcupine is a hindgut fermenter animal that ferment their feeds, especially forage and fibrous feeds, in the caecum by microbes. However, there is limited information about feed fermentation by bacteria and its enzyme activity in caecum of porcupine. Therefore, this experiment was conducted to explore the bacteria and enzyme activity degrading cellulose, amylose and lipid from the feeds in the caecum of porcupine. The caecum of porcupine was taken from eight animals that were two males and six females. These animals were divided into two groups and given two treatments. The treatments were control feeds that consisted of jaat grass, bengkoang, belitung taro, sweet corn, tomato, banana, and mineral sources (KO) and control feed plus koi fish pellet (KP = KO + koi fish pellet). Since the digesta had been stored, it was necessary to study the incubation time (0 and 1 h). The experiment was conducted in factorial completely block design (2x2) with factor A was feed types, and factor B was incubation period. Variables measured were bacterial population and enzyme activity degrading cellulose, amylose and lipid; data were analysed using analysis of variance for bacterial population, and t test for enzyme activity. The result showed that the addition of koi fish pellet did not increase population of bacteria and enzyme activity. Bacterial population was affected by incubation time, but this factor did not influence enzyme activity. It is concluded that addition of koi fish pellet had stimulated enzyme activity without increasing bacterial population. A reverse result was obtained for the effect of incubation time.
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Judul: Pengaruh Penambahan Pelet Ikan Koi Ke Dalam Ransum Terhadap Performa Landak Jawa (Hystrix javanica)
Abstrak: Javan porcupine (Hystrix javanica) is one of the endengered species due to hunting by local communities for commercial purpose. An alternative methode to preserve the species is domestication through ex-situ breeding, and feeding is one important factor that contribute obviously successful domestication. The experiment was conducted to study the effect of koi fish pellet added into control feed on the performance of javan porcupine. The experiment used eight javan porcupines; four animals where given control feed (K0) consisting of forest jaat leaf, yam, taro belitung, tomato, siamesse banana and sweet corn, and the other animals were given control feed and koi fish pellet feed (K1). The data were analyzed descriptively and differences between treatment means were determined using T-test. The results showed that the addition of koi fish pellet into control ration increased significantly (P<0.05) total dry matter intake but daily gain, feed efficiency and final body weight of javan porcupine were not significantly affected by such addition.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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