Judul: Pemberian Tepung Pupa Ulat Sutera dan Tepung Bawang Putih terhadap Profil Darah dan Persentase Organ Dalam Ayam Broiler.
Abstrak: This research was aimed to investigate the effect of dietary silkworm pupae meal (SPM) and garlic meal (GM) and its combinations on blood profiles, visceral organ weight, and carcass pecentage of broiler chicken. The experiment used Ross strain chicks in a Completely Randomized Design 3 x 2 factorial with 3 replications and 10 chicks for each replication. Factor A was SPM level substitute fishmeal (FM) in ration (0%, 25%, and 50%), factor B was GM level in ration (0% and 2.5%). The treatments were: P0 = control diet, containing FM without GM; P1 = control diet+2.5% GM; P2 = ration with 25% SPM without GM; P3 = ration with 25% SPM+2.5% GM; P4 = ration with 50% SPM without GM; and P5 = ration with 50% SPM+2.5% GM. There were no negative effect in blood profiles, carcass and visceral organ yield affected by treatments. Silkworm pupae meal can replace 50% of fish meal utilization and could be applied as an alternative protein source in broiler ration.
Keyword: blood profiles, garlic meal, silkworm pupae meal, visceral organ

Judul: Quality of Protein and Metabolic Energy of Silkworm Pupae Meal and its Application in Broiler Chicken Diet
Abstrak: Peningkatan permintaan produk ternak khususnya ayam broiler diperkirakan akan terus terjadi dan berdampak pada peningkatan kebutuhan pakan. Ketersediaan protein yang bersumber pada tepung ikan mengalami penurunan dikarenakan sumberdaya alam terbatas. Untuk mengatasi masalah tersebut diperlukan bahan pakan sumber protein. Pupa ulat sutera (Bombyx mori) berpotensi menggantikan peran tepung ikan sebagai bahan pakan sumber protein pada unggas. Pertumbuhan ayam broiler yang sangat cepat berpengaruh terhadap kecepatan metabolisme zat makanan dalam tubuh. Aktivitas metabolisme yang cepat dapat menyebabkan stress. Bahan pakan yang mengandung antioksidan dapat ditambahkan sebagai feed additive untuk mengurangi stress pada ternak. Penggunaan feed additive dari bahan herbal seperti Bawang putih (Allium sativum L.) dapat menunjang produksi pangan hasil ternak yang aman dikonsumsi. Tepung pupa ulat sutera yang dikombinasikan dengan tepung bawang putih diharapkan dapat menjadi salah satu alternatif pakan ternak. Berdasarkan latar belakang tersebut, tujuan penelitian ini adalah (1) mengevaluasi kualitas asam amino, kualitas protein dan kandungan energi metabolis tepung pupa ulat sutera sebagai pengganti tepung ikan dalam ransum ayam broiler; (2) mengevaluasi kombinasi penggunaan tepung pupa ulat sutera dan tepung bawang putih terhadap profil protein darah, aktifitas antioksidan dan profil karkas ayam broiler. Rancangan percobaan yang digunakan dalam percobaan penggunaan tepung pupa ulat sutera dalam ransum ayam broiler sebagai pengganti tepung ikan adalah Rancangan Acak Lengkap (RAL) Faktorial 3 (P0, P25, dan P50) x 2 (B0 dan B2.5), dengan 3 kali ulangan, setiap ulangan terdiri atas 10 ekor ayam. Parameter yang di uji yaitu kualitas asam amino, kualitas protein, kandungan energi metabolis, metabolit darah dan profil karkas ayam broiler. Hasil analisa skor kimia dan indeks asam amino tepung pupa ulat sutera berturut-turut adalah sebesar 28.75% dan 44.92%, dengan nilai Net Protein Utilization yaitu sebesar 44.96 %. Rataan nilai EMSn tepung pupa ulat sutera sebesar 2943.90 kkal kg-1, hampir sama dengan nilai EMSn tepung ikan dan dapat digunakan untuk menggantikan sebagian penggunaan tepung ikan dalam ransum. Hasil penelitian menyimpulkan bahwa penggunaan 50% tepung pupa ulat sutera dalam ransum dapat menurunkan kadar total protein darah namun tidak mengganggu sintesis jaringan otot dan tulang pada ayam broiler. Penggunaan tepung pupa ulat sutera dan tepung bawang putih serta kombinasinya dalam ransum tidak berpengaruh negatif terhadap persentase karkas dan potongan komersial karkas yang dihasilkan., Increased demand for livestock products, especially broiler chickens is expected to continue to occur and have an impact on increasing demand for feed. The availability of protein derived from fish meal has decreased due to limited natural resources. To overcome these problems required alternative protein source feed ingredient. Silkworm pupae (Bombyx mori) has the potential to replace the role of fish meal as a source of protein in poultry. The rapid growth of broiler chickens affect the speed of metabolism of food substances in the body. Rapid metabolic activity can cause stress. Feed ingredients containing antioxidants can be added as feed additives to reduce stress on livestock.Use of feed additives from herbal materials such as Garlic (Allium sativum L.) can support the production of broiler meat that are safe to eat. The silkworm pupae meal combined with garlic meal is expected to be an alternative to broiler chicken feed. Based on
Keyword: broiler chicken, garlic meal, silkworm pupae meal

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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