Judul: The Growth Pattern Based on Body Weight and Body Measurements from Local Sheep at Jonggol Animal Science Teaching and Research Unit (UP3J)
Abstrak: The objective of this research was to know the growth pattern from local sheep in population based on body weight and body measurements. This research has been done from July up to August 2007 at UP3J. Local sheep based on sex (159 males and 330 females) was identified by teeth to classify their age such as birth to weaning (2 months), weaning to 12 months of age, I1, I2, I3, I4 and I5. Variables in this research were body weight and body measurements such as wither height, body length, chest width, chest circumference and chest depth. Data obtained were analyzed using t-student test to compare average body weight and body measurement based on sex, Pearson correlation was used to measure relationship between body weight and body measurements. Minitab V. 14 package program was used to analyze the data. The result showed that the growth rate on fast from conception to birth and to puberty. At puberty period, the growth rate started to slow down until the age of maturity was reashed. The highest score found by Pearson correlation in male pre weaning was 0,958 between body weight and chest circumference, whereas in female pre weaning was 0,962 between body weight and chest depth.
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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: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4