Judul: The Population and Productivity of Native Duck in Two Village with a Different Topography in Cianjur Frefecture.
Abstrak: Duck breeding is one of the community animal breeding wliich normaly could be found at paddy field area or swamps. The breeding system is a herding system that passed on from ancestor to the youngsters which cause limitation on farmer skill and knowledge of raising duck. This study goals is to obtain the information of native duck population, breeding system, and productivity in two village which lies on the same Cianjur river strem area with different topography.
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Judul: Kajian Produktivitas dan Fertilitas Itik Cihateup.
Abstrak: Cihateup duck is a primary duck of West Java that has been known as layer duck. It was lived at high land on cool temperature and mostly found is Tasikmalaya and Garut regency. This duck has not been known about of its biological characteristics yet. The aim of this research was to obtain information of production performance of Cihateup duck, which can be used as a reference for the animals development. Twelve female, 5 males ducks from Tasikmalaya regency and 31 females, 19 males ducks from Garut regency were used in this research. Commercial diet with 16% crude protein was given to the experimental animals. Water and feed were provided ad libitum. The data characteristic of production and fertility were analyzed with t-test by minitab release 13.20. Ratio of male duck and female duck was analyzed with X2 test. Correlation between production and fertility was analyzed with regretion by SAS 6.12. The result showed that Cihateup ducks are potential to be layer type. Perform of production that consist maturity age showed earlier. Average og body weight maturity of Cihateup ducks were 1 500-1 550 g. Peak production of Cihateup ducks were occured at third week (81.05±2.21 %) with potential production upper 60 %. Width of pubic bones Cihateup duck was 6 cm. Reproduction performs could be estimated from number of ova (772.17±663.60 eggs). The result showed that both of ducks had high potential egg production. Fertility of ducks were high, and there were similarity of male and female DOD. There were correlation between production and reproduction in Cihateup duck. This correlation values could be used to estimate production by reproduction traits.
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Judul: Penentuan tembaga secara spektrofotometri sinar tampak sebagai senyawa kompleks asosiasi-ion dengan biru metilena melalui ekstraksi pelarut
Abstrak: Analisis tembaga menggunakan metode spektrofotometri sinar tampak dapat dilakukan berdasarkan kemampuan ion tembaga membentuk senyawa kompleks berwarna dengan beberapa zat pengompleks. Penelitian ini dilakukan untuk menentukan tembaga sebagai kompleks asosiasi-ion menggunakan ligan tiosulfat pada pembentukan ion kompleksnya. Pembentukan ion tiosulfato- kuprat(1-) dilakukan dengan mereaksikan tembaga (II) dengan tiosulfat. Kompleks yang terbentuk diekstraksi ke dalam diklorometana sebagai kompleks asosiasi-ion tiosulfatokuprat(1-) dengan biru metilena [MB,CuS2O3]. Kompleks asosiasi-ion [MB,CuS2O3] mempunyai panjang gelombang dengan serapan maksimum 644 nm. Kondisi optimum pengukuran yang dilakukan pada panjang gelombang tersebut adalah pH 3,24, konsentrasi tiosulfat 0,10 M, konsentrasi biru metilena 0,08 M, dan waktu ekstraksi 2 menit. Kompleks asosiasi-ion [MB,CuS2O3] stabil sampai hari ke-4. Metode penentuan tembaga ini mempunyai batas deteksi 4,973 × 105 M, sensitivitas metode 8,418 × 10° M, dan perolehan kembali sebesar 131,07%. Ion kalsium(II), magnesium(II), besi(II), dan aluminium(III) mengganggu proses pembentukan kompleks asosiasi-ion sedangkan ion zink(II) tidak mengganggu.
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