Judul: Studi Morfometrik Domba Lokal Jantan Di Unit Pendidikan Dan Penelitian Peternakan Jonggol Sebagai Kriteria Seleksi
Abstrak: Jonggol local sheep is very potential to be developed at Jonggol Animal Science Teaching and Research Unit (JASTRU). The sheep have been well adapted to marginal environments including hot and dry weather, ectoparasites, and limited feed supply. However their growth rate performances still vary among the sheep. It is therefore selection needs to be conducted to get fast growing sheep. Daily gain was used as a standard of differing fast growing sheep and slow growing sheep. Sheep with daily gain above 100gr/head/day was categorized as fast growing sheep and daily gain under 80gr/head/day as the slowing group. The results show that shoulder height, body length, chest circumference, upper neck circumference, lower neck circumference, head length, and mouth circumference were significantly higher at fast growing sheep than slow growing group. Similar results were found that circumference of right foreleg and left upper hind leg, and circumference of hind pastern either at left or right sides were significantly higher at fast growing sheep than slow growing group. This may indicate that the parameters can be used as selection criteria for fast growing sheep. and the parameters can be used as selection criteria to obtain fast growing sheep. On the contrary, chest depth, neck length, tail length, circumference of left foreleg and right upper hind leg, and circumference of neck to thoracic limb and hind pastern either at left or right sides were similar between the two groups of sheep, indicating the three parameters might not be used as the selection criteria. Almost all parameters had positive correlation between one and the other parameters especially daily gain.
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Judul: Karakteristik Pertumbuhan Pra dan Pascasapih Domba Lokal di Unit Pendidikan dan Penelitian Peternakan Jonggol Institut Pertanian Bogor (UP3J-IPB)
Abstrak: Selection program on sheep needs some important factors like season, sex, body weight and age of dam. This research was aimed to get the characteristic of pre and post-weaning growth of local sheep in Jonggol Animal Science Teaching and Research Unit (JASTRU) IPB and selection criteria. The result can be used as a basic information on selection program to grade up the genetic properties of these sheep. This research located at JASTRU IPB, Singasari Village, sub district of Jonggol from June 2007 to May 2008 which represent two different seasons, rainy and dry. The number of sheep in the beginning of research was 154 head and in the end of research was only 33 head. The result showed that the value of Temperature Humidity Index were on slight and adequate heat. Statistic t test showed that there was a significant difference (p<0,05) between male and female birth weight in rainy season but in age of 90 and 180 day showed no significant difference. Also, birth weight between rainy and dry season was significantly different (P<0,05) and body weight on age 90 and 180 day was not significantly different. Variance analysis showed that age of dam significantly affected the male birth weight in dry season (p<0,05) and female birth weight in rainy season (p<0,05). The highest lamb body weight was owned by lamb from 2,5 to 3,0 years of dam. Pre-weaning weekly average daily gain (ADG) was higher than that of post-weaning, both on male and female, and rainy and dry season. Body weight on age 90 day can be used as a selection criteria and selection on dam can be done at age 1 to 2 years of age. Selection response of 90 day weight in dry season was higher than that of rainy season.
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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