Judul: Persentase dan Kualitas Karkas Itik Cihateup-Alabio (CA) pada Umur Pemotongan yang Berbeda
Abstrak: Low demand of duck meat is influenced by its quality. Generally, ducks slaughtered at 8 weeks have low carcass quality. Slaughter age is expected to influence carcass quality. Therefore, the study of carcass quality in different slaughter ages (8, 10, and 12 weeks) is needed. This research used 32 males and 18 females cihateup-alabio (CA) ducks. Ducks were grouped by hatching period. The experiment design was randomized block factorial (3x2). Treatments were slaughter age and sex. Traits measured were slaughter weight, percentage of carcass and its parts, physical and sensory quality of duck carcass. The result showed that interaction of slaughter age and sex affect slaughter weight. The higher slaughter age resulted higher breast and abdominal fat percentage, but had smaller thigh percentage. Sex had no effect on carcass percentage and its parts. Higher slaughter age and male sex showed better phisycal carcass quality. Differences in slaughter age and sex had no effect on panelist preference. This research concluded that higher slaughter age produces better carcass percentage and quality.
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Judul: Persentase Karkas, Dada, Paha dan Lemak Abdomen Itik Cihateup Jantan Umur 10 Minggu yang Diberi Tepung Daun Beluntas, Vitamin C dan E dalam Pakan
Abstrak: Duck is one of poultry that needs to be improved in production of eggs and meat. The purpose of this study was to investigate the effect of feeding beluntas leaf powder, vitamin C and vitamin E on percentage of carcass, breast, thigh and abdominal fat of male Cihateup ducks. The diet treatments were commercial diet as control (K), commercial diet + beluntas leaf meal 0,5% (KB), commercial diet+beluntas leaf meal 0,5%+250 mg vitamin C (KBC), commercial diet + beluntas meal 0,5% + 400 mg vitamin E (KBE). Ninety six ducks were used in this research and were reared from DOD up to 10 weeks of old. The research was conducted at Department of Poultry Production Faculty of Animal Science Bogor Agricultural University. The experimental design used was randomized block design with four treatments and three replications. The results showed that feeding beluntas leaf powder 0,5% significantly decreased (P<0,05) percentage of breast. Feeding control, control + 0,5% beluntas leaf powder + vitamin C 250 mg/kg and control + 0,5% beluntas leaf meal + vitamin E 400 IU did not affect the parameters observed. The conclusion of this study was that feeding beluntas leaf, vitamin C or vitamin E did not affect to carcass, thigh and abdominal fat.
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Judul: Aproksimasi Fungsi Sinus dan Kosinus sebagai Kombinasi Linear dari Fungsi Eksponensial
Abstrak: Salah satu gagasan yang menarik dalam matematika adalah aproksimasi suatu fungsi oleh fungsi lain. Sebagai contoh, fungsi polinom dapat diaproksimasi menggunakan deret Taylor atau fungsi persamaan diferensial dapat diaproksimasi menggunakan deret Fourier. Adapun fungsi yang dapat mengaproksimasi fungsi lain salah satunya adalah fungsi eksponensial. Kemungkinan mengaproksimasi fungsi dengan kombinasi linear dari fungsi eksponensial dari bentuk eˣ, e²ˣ, ... dianggap sebagai perkembangan sejajar dengan gagasan Deret Taylor yang mengaproksimasi fungsi dengan kombinasi linear dari segi fungsi kuadrat. Fungsi sin x dan cos x digunakan sebagai target untuk menilai seberapa baik aproksimasi yang dilakukan oleh fungsi yang diberikan. Aproksimasi fungsi sinus dan kosinus menggunakan hampiran Taylor lebih akurat dibandingkan dengan aproksimasi menggunakan fungsi eksponensial.
Keyword: Aprosimaksi eksponensial, aproksimasi fungsi, aprosimaksi Taylor, fungsi eksponensial