Judul: Persentase Organ Dalam serta Kandungan Vitamin A Hati Ayam Petelur yang Diberi Pakan Mengandung Marigold (Tagetes erecta)
Abstrak: Marigold is an ornamental plant that contains carotenoids, carotene and xantofil. The purpose of this research were the used of marigolds as feed and evaluate its effect on the internal organs of laying hens and the storage vitamin A on liver. This study used 48 laying hens (19 weeks Hy-Line Brown type on production phases) which were treated for 11 weeks. The experimental design used a completely randomized design (CRD) with four treatments and three replications. The treatments were R0 : control diet without marigold meal, R1 : diet contained 5% leaf meal (TDM), R2 : diet contained 5% flower meal (TBM), R3 : diet contained 2.5% leaf meal (TDM) and 2.5% flower meal (TBM). The result of analysis showed the increment of marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) significantly affected (P<0.05) diets and consumption of provitamin A. Vitamin A on liver was analyzed by HPLC method and descriptively showed the increment of 5% flower meal and marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) had the highest amount. The addition of marigold significantly affected (P<0.05) weight of the bile and the spleen of internal organs. As the result it can be concluded the addition of marigold mixture 2.5% leaf meal (TDM) and 2.5% flower meal (TBM) has better effect than other treatments.
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Judul: Profil Darah Ayam Petelur yang Diberi Ransum Mengandung Tepung Daun dan Bunga Marigold (Tagetes erecta)
Abstrak: Darah memiliki banyak fungsi penting seperti membawa nutrien dari saluran pencernaan ke jaringan, membawa oksigen dari paru-paru ke jaringan dan karbondioksida dari jaringan ke paru-paru, membawa hormon dan hasil sisa metabolisme ke organ ekstresi. Profil darah ternak akan mengalami perubahan seiring dengan perubahan fungsi fisiologisnya. Marigold merupakan tanaman hias yang sangat mudah tumbuh di Indonesia. Hasil analisis nutrien menunjukkan bahwa daun marigold mengandung protein kasar 18%, serat kasar 8,67% dan energi metabolis 1978 kkal serta bunga marigold mengandung protein kasar 10,17%, serat kasar 15,13% dan energi metabolis 2348 kkal. Marigold juga memiliki kandungan Fe sebesar 167 μg/gram. Melihat dari kandungannya, marigold dapat dimanfaatkan sebagai bahan pakan. Marigold juga memiliki kandungan karotenoid yang sering dimanfaatkan untuk meningkatkan skor warna pada kuning telur. Akan tetapi, masih belum diketahui kondisi fisiologi profil hematologi ayam petelur yang diberi marigold. Profil darah pada hewan tercermin dari jumlah nutrien yang diabsorpsi dan dapat dijadikan sebagai salah satu indikator status kesehatan. Penelitian ini bertujuan untuk mengevaluasi pengaruh penambahan tepung daun, tepung bunga serta ,campuran tepung daun dan bunga marigold pada pakan ayam petelur terhadap jumlah eritrosit, kadar hemoglobin (Hb), persentase hematokrit, MCV, MCHC, jumlah leukosit, persentase limfosit, persentase heterofil,dan rasio heterofil/limfosit.
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Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
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