Judul: Profil Hematologi Domba Lokal Jantan Yang Diberi Pakan
Mengandung Minyak Ikan Lemuru dan Disuplementasi Vitamin E atau Selenium
Abstrak: Penelitian ini bertujuan menganalisis pengaruh pemberian minyak ikan lemuru yang disuplementasi vitamin E atau selenium terhadap profil hematologi domba lokal jantan. Penelitian ini menggunakan 21 ekor domba jantan dengan umur 9-12 bulan dengan rata-rata bobot badan 25±2,58 kg. Penelitian ini menggunakan rancangan acak kelompok (RAK) dengan 3 perlakuan dan 7 ulangan. PL = ransum mengandung minyak ikan lemuru 6%, PE = PL + vitamin E 500 IU, PSE = PL + selenium 0.5 ppm. Peubah yang diamati dalam penelitian ini meliputi konsumsi nutrien, hematokrit, jumlah eritrosit, hemoglobin, MCV, MCHC, jumlah leukosit, diferensiasi leukosit dan rasio neutrofil/limfosit. Data yang diperoleh dianalisis menggunakan Analysis of Variance (ANOVA) dan perlakuan yang berbeda nyata diuji lanjut dengan Uji Duncan menggunakan program SPSS 25. Hasil penelitian menunjukkan bahwa perlakuan tidak berbeda nyata (P>0,05) terhadap jumlah eritrosit, leukosit dan turunannya, namun berbeda nyata (P<0,05) terhadap persentase monosit dalam darah. Simpulan dari penelitian ini adalah suplementasi vitamin E atau selenium pada pakan mengandung minyak ikan lemuru dapat menurunkan persentase monosit sehingga tingkat inflamasi pada domba jantan menurun., This research was aimed to analyze the effects of lemuru fish oil supplementation with vitamin E or selenium on the hematological profile of local male sheep. This research used 21 male sheep aged 9-12 months with an average body weight of 25 ±2.58 kg. The study employed a randomized block design (RBD) with 3 treatments and 7 replicates. The treatments consisted of PL = diet containing 6% lemuru fish oil, PE = PL + 500 IU vitamin E, PSE = PL + 0.5 ppm selenium. Observed variables included nutrient consumption, hematocrit, erythrocyte count, hemoglobin, MCV, MCHC, leukocyte count, leukocyte differentiation, and neutrophil/lymphocyte ratio. The data were analyzed using Analysis of Variance (ANOVA) and significantly different treatments were further tested with Duncan's test using SPSS 25. The results showed no significant differences (P>0,05) in the count of erythrocytes, leukocytes, and their derivatives, however, there was a significant difference (P<0,05) in the percentage of monocytes in the blood. The conclusion of this study is that supplementation with vitamin E or selenium in diets containing lemuru fish oil can reduce the percentage of monocytes, thereby decreasing inflammation levels in male sheep.
Keyword: Domba Lokal, Hematologi, Selenium, Vitamin E, Lemuru

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.
Keyword: