Judul: Performance and Blood Metabolites of  Local Male Sheep Feed with Containing Lemuru Oil Supplemented with Selenium or Vitamin E
Abstrak: Penelitian ini bertujuan menganalisis performa dan metabolit darah domba lokal jantan yang diberi pakan mengandung minyak lemuru disuplementasi selenium atau vitamin E dan dipelihara pada suhu dan kelembapan tinggi. Ternak yang digunakan pada penelitian ini sebanyak 21 ekor domba jantan lokal dengan bobot badan rata rata ternak 24±2,43 kg dengan umur sekitar 9-12 bulan. Penelitian terdiri dari 3 perlakuan dan 7 kelompok dengan model Rancangan Acak Kelompok (RAK). PL=Ransum perlakuan mengandung 6% minyak lemuru, PE = PL + Vitamin E 500 IU, PSe = PL + Selenium 0,5 ppm. Hasil penelitian menunjukkan bahwa perlakuan memberikan pengaruh tidak nyata (P>0,05) terhadap konsumsi nutrien, glukosa darah, kolesterol darah, dan BCS domba, namun hasil berbeda nyata (P<0,05) terhadap PBBH dan efisiensi pakan. Kesimpulan penelitian ini adalah penggunaan ransum mengandung 6% minyak lemuru dan suplementasi selenium 0,05 ppm (PSe) memberikan hasil lebih tinggi terhadap pertambahan bobot badan harian dan efisiensi pakan. Penggunaan ransum mengandung 6% minyak lemuru (PL), PL + Vitamin E 500 IU (PE) dan PL + Selenium 0,5 ppm (PSe) memberikan hasil yang sama terhadap konsumsi nutrien, BCS, kadar glukosa dan kolesterol darah., This study aimed to analyze the effect of performance and blood metabolites of local male sheep feed with lemuru oil supplemented selenium or vitamin E and maintained at high temperature and humidity. Total 21 local male sheep with an average body weight of 24 ± 2.43 kg aged around 9-12 months. This study consisted of 3 treatments and 7 groups with randomized blok design model. The PL= treatment ration contains 6% lemuru oil, PE= PL + Vitamin E 500 IU, PSe= PL+ Selenium 0.5 ppm. The results showed that the treatment gave gave not significantly results (P>0.05) nutrient consumption blood glucose, blood cholesterol, and BCS of sheep, however, there was a significant results (P<0.05) on average daily gain and feed efficiency. The conclusion is that the use of ration contains 6% lemuru oil and 0.05 ppm selenium supplementation (PSe) provides higher results in average daily gain and feed efficiency. The use of ration contains 6% lemuru oil ( PL), PL + Vitamin E 500 IU ( PE), PL + Selenium 0.5 ppm (PSe) rations gave the same results on nutrient consumption, BCS, blood glucose and cholesterol.
Keyword: Domba Lokal, Minyak Lemuru, Selenium, Vitamin E

Judul: Addition of Lemuru Fish Oil and Suplementation of Antioxidants to the Heat Stress Response of Male Sheep During Growth
Abstrak: Penelitian ini bertujuan menganalisis respon stress panas pada domba lokal jantan masa pertumbuhan yang diberi minyak lemuru, vitamin E, dan selenium. Ternak yang digunakan sebanyak 21 ekor domba jantan ekor tipis dengan rata-rata bobot badan 25±2,58 kg dan berumur 9-12 bulan. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 3 perlakuan dan 7 ulangan. Perlakuan RK = konsentrat kontrol, RL = konsentrat mengandung 6% minyak lemuru, RE- SE = konsentrat mengandung 6% minyak lemuru + Vitamin E 500 IU + Selenium 0,5 ppm. Parameter yang diukur adalah konsumsi nutrien, respon fisiologis, kadar MDA dan kadar SOD. Perlakuan RL dan RE-SE memberikan pengaruh yang sangat nyata lebih rendah (P<0,01) dibandingkan RK pada konsumsi bahan kering, protein kasar, BETN, laju denyut jantung, suhu rektal, kadar MDA, namun memberikan hasil yang lebih tinggi (P<0,01) pada konsumsi lemak kasar dan kadar SOD. Kesimpulan dari penelitian ini bahwa penambahan 6% minyak lemuru yang dikombinasikan dengan suplementasi vitamin E dan selenium menurunkan konsumsi bahan kering, protein kasar, BETN, respon fisiologis dan kadar MDA, namun meningkatkan konsumsi lemak kasar dan kadar SOD pada domba lokal jantan., This study aimed to analyze the heat stress response of local rams during growth period feed containing lemuru oil, vitamin E, and selenium. The livestock used were 21 rams with an average body weight of 25±2.58 kg and aged 9-12 months. This study used a randomized block design (RCBD) with 3 treatments and 7 replications. Treatment RK = concentrate control, RL = concentrate containing 6% lemuru oil, RE- SE = concentrate containing 6% lemuru oil + Vitamin E 500 IU + Selenium 0.5 ppm. The parameters measured were nutrient consumption, physiological responses, MDA levels and SOD levels. RL and RE-SE treatments had a very significantly lower effect (P<0.01) than RK on dry matter consumption, crude protein, BETN, heart rate, rectal temperature, MDA levels, but gave higher results. (P<0.01) on crude fat consumption and SOD levels. The conclusion of this research is that the addition of 6% lemuru oil combined with vitamin E and selenium supplementation reduced dry matter consumption, crude protein, BETN, physiological responses and MDA levels, but increased crude fat consumption and SOD levels in local rams
Keyword: MDA, Minyak Lemuru, respon fisiologis, SOD

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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