Judul: Formulasi Wafer Roll Berbasis Flaxseed (Linum usitatissimum) dan Biji Labu Kuning (Cucurbita Moschata) sebagai Camilan Mengandung Asam Lemak Esensial.
Abstrak: Anak-anak dan orang dewasa di Indonesia mengalami defisiensi asupan asam lemak. Penelitian ini bertujuan untuk mengembangkan produk berupa wafer roll berbasis tepung biji rami kuning, biji rami cokelat, dan biji labu kuning sebagai makanan tambahan yang dapat meningkatkan asupan asam lemak. Desain penelitian ini adalah Rancangan acak lengkap dengan contoh sebanyak 30 orang. Hasil organoleptik menunjukkan bahwa uji hedonik dan uji mutu hedonik ketiga formula dapat diterima oleh panelis. Perbandingan formula (biji rami kuning dan biji rami cokelat) yaitu F1 20:80, F2 30:70, dan F3 40:60. Tidak berbeda nyata antar formula (p>0.05), kecuali mutu warna, tekstur, dan sisa rasa pahit. Hasil analisis gizi menunjukkan perbedaan nyata pada kadar air, lemak, dan asam lemak (p<0.05). Formula terpilih berdasarkan uji rangking adalah formula F1. Hasil analisis 100 gram Wafer roll F1 memiliki kadar (%bb) air 2.70, abu 2.42, lemak 31.93, n-3 3.55, n-6 5.1, n-9 14, protein 12.84, dan karbohidrat 50.11. Kontribusi satu takaran saji (25 g) terhadap AKG anak-anak 4-6 tahun sebesar 8.1% energi, 8.8% protein, 12.4% lemak, 5.5% karbohidrat, n-3 94.4%, dan n-6 12.3%.
Keyword: asam lemak, biji labu kuning, biji rami, camilan

Judul: Development of Biscuits with the Addition of Flax Seeds as Finger Food for Toddlers with Omega-3 Deficiency
Abstrak: Kekurangan zat gizi selama masa percepatan pertumbuhan otak, yaitu antara trimester terakhir kehamilan dan dua tahun pertama masa kanak-kanak dapat merusak fungsi otak. Biji rami mengandung jumlah yang cukup dari Asam α-Linolenat (ALA), sejenis asam lemak omega-3. ALA bermanfaat untuk perkembangan otak bayi. Penelitian ini bertujuan mengembangkan produk biskuit dengan penambahan biji rami sebagai finger food bagi baduta dengan defisiensi omega-3. Penelitian berupa experimental study dengan rancangan acak lengkap terdiri dari tiga formula dengan perbandingan shortening : biji rami giling F0 (100%:0%), F1 (93%:7%), serta F2 (87%:13%). Prosedur penelitian uji organoleptik, uji karakteristik fisik, analisis proksimat, serta analisis profil asam lemak dilakukan untuk menentukan formula terpilih dengan hasil F1. Biskuit formula terpilih mengandung kadar air 3,17%, kadar abu 1,36%, lemak 31,17%, protein 5,13%, karbohidrat 59,14%, omega-3 0,64 g/100 g biskuit, serta omega-6 23,64 g/100 g biskuit. Satu takaran saji biskuit setara 37,6 g terdiri dari 2 keping memberikan kontribusi energi 15% (203 kkal) dan 34% (0,24 g) terhadap angka kecukupan energi dan omega-3 anak usia 1-3 tahun berturut-turut., Insufficient nutrient intake during the critical period of accelerated brain growth, which occurs from the last trimester of pregnancy through the first two years of childhood, can adversely affect brain function. Flaxseed contains a significant amount of α-Linolenic Acid (ALA), a type of omega-3 fatty acid. ALA is beneficial for infant brain development. This research aims to develop biscuits with the addition of flaxseed as a finger food for toddlers with omega-3 deficiency. The study is an experimental design with a completely randomized arrangement comprising three formulas with shortening: ground flaxseed ratios of F0 (100%:0%), F1 (93%:7%), and F2 (87%:13%). Organoleptic and physical characteristics test, proximate analysis, and fatty acid profile analysis were conducted to determine the selected formula, resulting in F1. The selected biscuit formula contains 3.17% moisture, 1.36% ash, 31.17% fat, 5.13% protein, 59.14% carbohydrates, 0.64 g/100 g of omega-3, and 23.64 g/100 g of omega-6. One serving size of biscuits equivalent to 37.6 g contributes 15% (203 kcal) and 34% (0.24 g) of energy and omega-3 adequacy for children aged 1-3 years, respectively.
Keyword: biscuit formula, deficiency, flax seed, brain development, omega-3

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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