Judul: Pregnancy Supplement Formulation Based on Tuna Eyes Virgin Fish Oil Protected by Antioxidant Secang Wood with the Mixture Design
Abstrak: Indonesia menghadapi tantangan besar terkait prevalensi stunting, sehingga dari aspek gizi, pemenuhan docosahexaenoic acid (DHA) menjadi penting dalam pencegahan dampak penurunan kecerdasan akibat stunting. Docosahexaenoic acid dapat menjadi model suplementasi omega-3 untuk perkembangan otak dan retina mata. Mata tuna mengandung DHA yang tinggi, namun fortifikasi minyak ikan dalam produk pangan rentan terhadap oksidasi sehingga membutuhkan antioksidan. Kayu secang mengindikasikan memiliki aktivitas antioksidan yang tinggi. Penelitian ini bertujuan menentukan optimasi formulasi suplemen kehamilan berbasis virgin fish oil mata tuna terproteksi antioksidan kayu secang menggunakan mixture design. Penelitian meliputi determinasi karakteristik kayu secang, karakteristik mata tuna, cold centrifugation separation, karakteristik virgin fish oil mata tuna dan optimasi formulasi dengan mixture design. Hasil penelitian menunjukkan mata tuna memiliki kandungan DHA sebesar 32,12%. Kayu secang memiliki aktivitas antioksidan 5,08±0,21 ppm dan nilai total fenol 2165,80±0,14 mg GAE/g. Formula optimal didapatkan dari variabel virgin fish oil mata tuna 39,98%, kayu secang 21,68% dan guar gum 38,33% dengan inhibisi bilangan peroksida 63,72%. Nilai respon optimal pH dan viskositas 3,10 dan 478,76 cPs, sedangkan verifikasi di laboratorium 3,27±0,9 dan 479±2,83 cPs., Indonesia faces major challenges related to the prevalence of stunting, so from nutritional aspect, the fulfillment of docosahexaenoic acid (DHA) is important in preventing the decline in intelligence due to stunting. Docosahexaenoic acid (DHA) can be a model for omega-3 supplementation for the development of the brain and retina of the eye. Tuna eyes contain high DHA. However, fortification of fish oil in food products is susceptible to oxidation and thus requires antioxidants. Secang wood has high antioxidant activity. The study aims to determine the optimization of a pregnancy supplement formulation based on tuna eyes virgin fish oil protected antioxidant secang wood with the mixture design. Research covering determination of the characterisctics of secang wood, characterisctics of tuna eyes, cold centrifugation separation, characterisctics of tuna eyes virgin fish oil and formulation optimizing with mixture design. The results showed that tuna eyes had a DHA content of 32,12%. Secang wood has an antioxidant activity of 5,08±0,21 ppm and a total phenol value of 2165,80±0,14 mg GAE/g. The optimal formula obtained was 39,98% tune eyes virgin fish oil, secang wood 21,68% and guar gum 38,33% with 63,72% inhibition of peroxide value. The optimal pH and viscosity response values were 3,10 and 478,76 cPs, while the laboratory results were 3,27±0,9 and 479±2,83 cPs.
Keyword: Kayu Secang, stunting, tuna, virgin fish oil, secang wood, stunting, tuna, virgin fish oil

Judul: Optimization Supplement Formulation Based on Virgin Fish Oil Tuna Eye Ball Using Mixture Design
Abstrak: Stunting merupakan permasalahan gizi serius di Indonesia, sehingga pemenuhan protein dan docosahexaenoic acid (DHA) menjadi solusi dalam pencegahan. Ikan kayu dan mata tuna mempunyai prospek yang menjanjikan dalam pemenuhan protein dan docosahexaenoic acid (DHA). Penelitian ini bertujuan menentukan optimasi formulasi suplemen kehamilan berbasis virgin fish oil mata tuna dan hidrolisat protein ikan kayu dengan metode mixture design. Tahapan penelitian, meliputi preparasi, ekstraksi, dan determinasi profil virgin fish oil mata tuna, hidrolisis dan determinasi profil protein ikan kayu, serta optimasi formulasi dengan rancangan statistik mixture experiment {3,1} simplex-lattice design with axial points. Persentase formula optimal yang diperoleh 40.89% untuk variabel virgin fish oil mata tuna, 25.69% hidrolisat protein ikan kayu serta kuning telur 33.40% kuning telur. Sumbangan DHA yang didapat 210 mg sesuai dengan kebutuhan harian DHA ibu hamil, sehingga rancangan formula suplemen diharapkan menjadi sebuah solusi dalam mencegah stunting, Stunting is a serious nutrition issue in Indonesia, and from nutrition aspect, protein and docosahexaenoic acid (DHA) are the important to prevent it. Katsuobushi and tuna’s eyes have promising prospects in fulfilling the adequate amounts of protein and docosahexaenoic acid (DHA) for dietary intake. The purpose of this research was determining the optimal formula for tuna’s eyes virgin fish oil and katsuobushi protein hydrolysate based pregnancy supplement by applying mixture design method. This research was done in some steps, started from preparation, extraction, and determination profile of tuna’s eyes virgin fish oil, hydrolysis and determination profile of katsuobushi fish protein, and formula optimization using a mixture experiment {3,1} simplex-lattice design with axial points. The optimal percentages for each variable of the product were 40.89% of tuna’s eyes virgin fish oil, 25.69% of katsuobushi protein hydrolysate, and 33.40% of egg yolk. The development of optimal formula resulted in a product containing nutrition of 210 mg DHA, which can fulfil the average requirement dietary intake for pregnant women and become a solution for stunting prevention.
Keyword: mixture design, peptida bioaktif, stunting, virgin fish oil, bioactive peptide

Judul: Gelombang soliter internal pada lapisan atmosfiri yang memiliki perubahan kecepatan angin yang cepat
Abstrak: Gelombang internal adalah suatu gelombang yang terjadi di dalam suatu fluida. Gelombang ini muncul karena adanya perubahan rapat massa di setiap lapisan di dalam fluida. Salah satu gelombang internal yang ditemui di lappisan atmosfir adalah gelombang soliter internal, seperti yang terjadi pada fenomena "morning glory" di Australia. pada fenomena "Morning glory" terjadi penurunan tekanan hingga bebrapa milibar.
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