Judul: Stabilitas Kapsul Minyak Ikan Patin (Pangasius sp.) selama Penyimpanan dengan Metode Schaal
Abstrak: Encapsulation and antioxidant addition to catfish oil from Kampar – Riau were conducted to improve its oxidation stability during storage. Catfish oil was known have high in unsaturated fatty acid content. Schaal method had been developed to determine oil oxidation stability in a short time and simple way utilizing oven storage (50°C). Encapsulated catfish oil tested were oil from its viscera and white adipose tissue (WAT) with some treatments (without antioxidant, addition of olive oil 1:1, and addition of butylated hydroxytoluene (BHT) 200 ppm). Fatty acid profile in viscera and WAT oil were dominated by palmitic and oleic which were 25.97% and 34.72% for WAT catfish oil, 22.34% and 35.18% for viscera catfish oil. Baseline characteristics of WAT catfish oil included, acid value, peroxide, free fatty acid, iodine, anisidine, and total oxidation were descriptively better than viscera catfish oil. Addition of olive oil and BHT gave significant (p<0.05) on of all parameter except iodine value. The butylated hydroxytoluene (BHT) addition gave the best result in maintaining catfish oil quality.
Keyword: Bogor Agricultural University (IPB), olive oil, catfish oil, BHT, Antioxidant

Judul: Storage of Tuna Fish Oil (Thunnus sp.) with the Addition of Antioxidants in Glass Bottle Packaging
Abstrak: Ikan Tuna merupakan jenis pelagis besar yang umumnya diproses menjadi fillet, ikan beku dan produk kaleng sebagai komoditas ekspor. Pengolahan ikan tuna mengakibatkan adanya hasil samping industri, salah satunya berupa minyak ikan. Pemasakan dengan uap air panas pada pengalengan ikan tuna menghasilkan cairan hasil samping pengalengan, yang merupakan campuran dari fraksi minyak, fraksi air, dan padatan tersuspensi. Penelitian ini bertujuan untuk menentukan (1) profil asam lemak, kandungan logam berat, nilai kejernihan, nilai oksidasi primer dan sekunder minyak ikan tuna kasar; (2) konsentrasi antioksidan terbaik dari minyak zaitun, minyak dedak padi yang keduanya mengandung antioksidan alami, serta α-tokoferol yang memiliki kemampuan antioksidan terbaik dalam menjaga stabilitas minyak ikan selama proses penyimpanan dengan metode real time; (3) kemasan botol kaca terbaik sebagai media penyimpan terhadap tingkat kerusakan minyak ikan tuna Tahapan penelitian yang pertama yaitu karakterisasi minyak ikan tuna kasar dan pemurnian minyak ikan tuna kasar. Tahap kedua adalah penambahan minyak zaitun dan minyak dedak padi, serta α-tokoferol. Minyak ikan tuna diuji stabilitasnya menggunakan metode real time selama penyimpanan pada suhu ruang (12 hari), minyak dengan formula terbaik disimpan dalam botol kaca 12 hari. Stabilitas minyak selanjutnya diuji dengan metode Schaal oven test tiap 3 hari. Rancangan yang digunakan adalah rancangan acak lengkap In time. Karakteristik minyak ikan tuna kasar yang diperoleh yakni nilai FFA 1,40±0,08%, AV 2,38±0,13 mg KOH/kg, PV 7,94±1,34 meq/kg, AnV 8,81±2,45 meq/kg, dan Totox 24,68±3,68 meq/kg, viskositas 89,77±0,40 (cP), kejernihan 28,33±6,55%. Kandungan asam lemak dominan adalah DHA 27,12%. Residu logam berat merkuri ≤ 0,005 memenuhi standar IFOS sedangkan timbal ≤ 0,5 belum memenuhi standart IFOS, tingkat kejernihan lebih dari 70%. Hasil uji parameter oksidasi minyak ikan tuna murni yakni nilai FFA 1,36±0,08%, AV 2,32±0,13 mg KOH/kg, PV 2,81±0,55 meq/kg, AnV 4,32±1,15 meq/kg, dan Totox 9,94±0,95 meq/kg, viskositas 21,47±0,06 (cP), kejernihan 78,25±1,13%. Minyak ikan tuna murni yang ditambahkan α-tokoferol 0,6% dan disimpan pada suhu ruang menghasilkan nilai FFA dan AV yang mampu bertahan hingga 12 hari penyimpanan. Untuk parameter PV, AnV dan Totox mampu bertahan hingga 9 hari penyimpanan. Penambahan α-tokoferol pada minyak ikan mampu mencegah proses oksidasi dan memperpanjang masa simpan hinga 12 hari penyimpanan. Minyak ikan yang disimpan dalam kemasan botol kaca warna coklat lebih stabil dibandingkan minyak ikan yang disimpan dalam botol kaca warna bening dan hijau., Tuna is a large pelagic type that is generally processed into fillets, frozen fish, and canned products as export commodities. Tuna processing results in industrial byproducts, one of which is fish oil. Cooking with hot water steam in canning tuna produces a liquid byproduct of canning, a mixture of oil fraction, water fraction, and suspended solids. This study aims to determine (1) fatty acid profile, heavy metal content, clarity value, primary and secondary oxidation value of crude tuna oil; (2) the best concentration of antioxidants from olive oil, rice bran oil which both contain natural antioxidants, and α-tocopherol which has the best antioxidant ability in maintaining the stability of fish oil during the storage process using real time methods; (3) the best glass bottle packaging as a storage medium against the level of damage to tuna oil. The first stage of
Keyword: α-tocopherol, tuna fish oil, real time, schaal oven test

Judul: Aplikasi Mobile untuk Identifikasi Emosi Manusia Berbasis Teks pada Jejaring Sosial Twitter dengan Klasifikasi Decision Tree
Abstrak: Humans are social beings that need to communicate with others. Humans in communication often reveal emotions either directly or indirectly. Awareness of people’s emotions when communicating is one of the reasons of emotion recognition. Emotion recognitions divided into 3 categories, namely physiological signals, facial expressions, and voice. However the existing method has limitations in use or cost. A potential solution is affective computing, which can recognize emotion through typing patterns by collecting and analyzing user behavior and context from touchscreen, accelerometer, and GPS on the smartphone. This method was implemented as an Android app on Twitter social networking service. This research used decision tree classification method to identify 7 types of emotions i.e. happiness, surprise, anger, disgust, sadness, fear, and neutral by using 10 features. The data used in this study consisted 300 datasets. The highest accuracy in the research produced 44%.
Keyword: emotion recognition, decision tree, affective computing