Judul: Studi perbandingan mikroba rumen antara domba dan kambing lokal
Abstrak: Sheep and goats are a small ruminants. They have similar system of digestion. According to former research there are differences between sheep and goats especially in rumen microbial. The aim of this research is to compare the rumen microbial population and level of alantoin urine between breed (sheep and goat) and sex (male and female). This research used local sheep and goat which its given the same feed based on each body weight of livestock. The design of the experiment was a Randomized Complete Block design, which is factor A was species and factor B was sex with 5 replications. Data were analysed using ANOVA and significant differences will be further tested using Duncan test. The result showed that there is highly significant differences (P<0.01) in total bacteria and protozoa population between sheep and goat. Total bacteria population were highly significant (P<0.01) different between sex but there is no significant different in total protozoa population. The rumen pH showed that there is no significant different between species and sex. The level of alantoin urine are significant different (W0.05) between species, but there is not significant different between species and sex. No correlation between alantoin and population of rumen microbial in sheep and goat.
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Judul: Studi perbandingan fisio anatomi saluran pencernaan kambing dan domba lokal
Abstrak: The objectives of the experiments were to compare the physio anatomy of gastro intestinal tracts between local goats and local sheep. The experiments were conducted held from March to July 2005. The experiments used ten goats (5 males and 5 females) and ten sheep (5 males and 5 females). The experimental design used was Randomized block design with factorial (2x2). Significant differences among treatments futher tested with Duncant test. The results showed that relative volume of total stomach and weights of stomach tissue to empty body weight were not significantly differences, retekulo-rumen, omasurn and abomasum volume had significantly differences, weights of tissue retikulo-nunen, omasum and abomasum to empty body weight were not significantly differences for species and sexs., Relative of abomasum volume was large significantly (P<0.05) in male goat, Small intestine length to bone length, retention time was large significantly (Pi0.05) in sheep more than goat.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4