Judul: Pengaruh konsentrasi maltodekstrin dan natrium kaseinat terhadap karakteristik mikroenkapsulat minyak sawit merah dengan menggunakan teknik spray drying
Abstrak: Asap cair merupakan suatu campuran dispersi asap dalam air yang dihasilkan dengan cara destilasi kering bahan baku pengasap seperti kayu, lalu dilanjutkan dengan proses kondensasi. Asap cair berasal dari bahan alami yaitu pembakaran hemiselulosa, selulosa, dan lignin dari kayu-kayu keras sehingga menghasilkan senyawa yang memiliki efek desinfektan, dan antioksidan seperti senyawa asam dan turunannya, alkohol, fenol, aldehid, karbonil, keton, dan piridin. Pemanfaatan asap cair mencakup industri makanan sebagai pengawet, bioinsektisida, dan desinfektan. Pengangkutan merupakan salah satu proses yang penting dalam penanganan pasca panen. Penanganan ikan yang kurang baik dan tepat selama transportasi (jangka waktu lebih dari 7 hari) akan mempengaruhi kualitas ikan, baik sifat fisik atau kimia pada ikan. Penggunaan es sebagai pengawet ikan memiliki beberapa kelemahan, diantaranya bersifat kamba, jika mencair menambah berat beban angkutan, dan mengurangi sifat tekstur daging ikan. Adanya kelemahan tersebut mendorong penggunaan asap cair sebagai bahan pengawet selama penanganan transportasi. Penelitian ini bertujuan mengetahui lama jangka waktu pengawetan terhadap ikan teri nasi segar menggunakan asap cair tempurung kelapa selama 9 hari waktu penyimpanan, serta pengaruh penggunaan asap cair sebagai pengawet terhadap sifat fisik dan kimia ikan teri nasi. Pada penelitian ini sebelumnya dilakukan analisa proksimat pada ikan teri nasi segar dan analisis asap cair. Setelah analisis awal, dilakukan proses perendaman dalam asap cair. Faktor-faktor dalam rancangan penelitian ini terdiri atas, (a) konsentrasi asap cair yang digunakan dengan 2 taraf yakni : a1 = 20%, a2 = 30 % dan (b) lama perendaman dalam asap cair dengan 3 taraf, yakni : b1 = 15 menit, b2 = 30 menit dan b3 = 45 menit. Kemudian ikan teri nasi segar pada masing-masing perlakuan dilakukan pengamatan terhadap kadar fenol. Hasil terbaik diantara perlakuan tersebut dilanjutkan dengan penyimpanan pada suhu kamar selama 9 hari, diamati tiap 2 hari (hari ke- 1, 3,5, 7 , dan 9). Selama penyimpanan dilakukan pengamatan terhadap kadar air, kadar protein dan uji Total Plate Counts (TPC), kapang dan khamir…
Keyword: Microencapsulation, Red palm oil, Carotene, Maltodextrin, Sodium caseinate, Spray drying, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Kajian Pengeringan Mikroenkapsulat Minyak Sawit Merah dengan Pengering Rak
Abstrak: Microencapsulation is a process for covering a component or a mixture of components with the other materials. The objective of this research is to study the emulsification and drying process of red palm oil emulsion to produce microencapsulated product with efficient production process. In this research, the coating materials used to form the emulsion of red palm oil are maltodextrine, gelatine, and carboxymethylcellulose (CMC). The good emulsification process can be achieved by homogenization of coating materials in 8 minutes and emulsion homogenization in 27 minutes, with the highest emulsion stability with the smallest creaming index (2.58%) and the smallest fat globule (20-60 μm). Tray dryer needed 25 minutes for preheating. The racks that can be used in the drying process are rack 2, 3, 4, and 5. The drying process must be conducted until the product has moisture content in 2 %db (dry basis). The position of the racks and the thickness of the emusion affected the drying time, the moisture content and the drying rate. The analyzed results showed that the drying time to achieve moisture content 2 %db in the thickness of emulsion 0.5, 1.0, 1.5 and 2.0 mm respectively are ± 3.57, ± 5.56, ± 7.30, and ± 11.40 hours. Based on these data, we can conclude that the thickness of the emulsion will lengthen the drying time and decrease the drying rate to achieve the same moisture content. Total weight that gained in the thickness of emulsion 0.5, 1.0, 1.5 and 2.0 mm respectively are 72.42, 143.21, 266.65 and 343.79 g, while the yields obtained respectively are 22.61, 22.37, 28.67 and 28.13%. The recommendations thickness which produces the good drying process parameters was 1.5 mm.
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Judul: Query Expansion based on Bilingual Dictionary Using Conditional Probability
Abstrak: Query expansion is a technique that can be used to bridge vocabulary gaps between queries and documents in the collection. With query expansion, user will be helped to formulate queries well so that user will optimize the search result. In this study, the expansion term was resulted from the translation of bilingual dictionary. Subsequently, several terms of expansion were elected based on the closeness of its relationship with the original query. This research showed that conditional probability can be used to select expansion term in bilingual translation method query expansion. The result of 1000 documents was more than 97% relevan document can be retrieved by this system. The more expansion term used, the larger number relevan document was retrieved.
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