Judul: Daya dan kestabilan buih putih telur itik tegal pada umur telur dan taraf penambahan asam sitrat yang berbeda
Abstrak: The usage of ducks egg for cake mixes is still rare since its foaming is lower than chicken egg. Albumen foaming and its stability are affected by egg age and chemical addition or stabilization. Chemical substance which can be used is citric acid. This research was designed to study whether albumen foaming and its stability of Tegal ducks egg in different age could be increased by adding citric acid in a given concentration before mixing. The result was hoped to supply information about the best albumen foaming and stability formed by Tegal duck egg by adding citric acid in different egg age. The research used Block Randomized Design factorial pattern. As first treatment were egg age which contained 4 factor levels; fresh, 7, 14 and 21 days of egg. Second treatment were citric acid addition, that also contained 4 factor levels; 0, 0.8, 1.6 and 2.4%. Egg which is collected in different days was used as block. The longer egg shelf life, the more block formed. Data which is obtained were analyzed by descriptive approach. The highest albumen foaming and its stability of Tegal ducks egg without citric acid addition was in fresh egg, which was 451.83±122.18% and 3.43±0.66% in leak percentage. Albumen foaming and its stability was decrease as egg age longer. Citric acid addition until 2.4% could increase albumen foaming and its stability only in fresh egg, with addition level best in 0.8%. This addition established foaming as much as 683.33±14.43% and 2.66±1.41% leak percentage.
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Judul: Pembuatan Tepung Telur dengan Stabilisator Kapur
Abstrak: Tujuan penelitian ini adalah untuk mendapatkan tepung telur yang memiliki keluwesan penggunaan mendekati telur segar . Hal-hal yang dipelajari antara lain sifat pembusaan, pemilihan bahan stabilisator emulsi, penggunaan kapur , proses pembuatan tepung telur , pengaruh penambahan kapur terhadap mutu tepung telur , pengaruh penyimpanan tepung telur , dispersibilitas dan penggunaan tepung telur . Bahan stabilisator yang digunakan adalah kapur sirih , mentega putih , " coffee mate" dan soda kue.
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Judul: Penyelesaian Masalah Rural Postman Problem pada Graf Campuran dengan Metode Corberan-Marti-Romero
Abstrak: Rural Postman Problem (RPP) merupakan permasalahan dalam pencarian rute terpendek dengan biaya minimum dan hanya sebagian sisi atau sisi berarah diperlukan saja yang harus dilewati. Pada karya ilmiah ini dibahas mengenai mixed Rural Postman Problem (MRPP), di mana representasi graf dari MRPP memiliki dua jenis sisi, yaitu sisi berarah dan sisi tak berarah. Metode yang digunakan adalah metode yang dikembangkan oleh Corberan-Marti-Romero. Algoritme yang digunakan yakni algoritme Kruskal untuk menentukan minimum spanning tree dan algoritme van Aardenne-Ehrenfest-de Bruijn untuk menentukan sirkuit Euler. Selain itu, solusi dari masalah minimum cost flow digunakan untuk mengonstruksi graf yang balans dan genap. Contoh aplikasi MRPP dalam karya ilmiah ini adalah penentuan rute pengiriman barang (paket) dengan jarak minimum.
Keyword: graf campuran, minimum cost flow, rural postman problem, sirkuit Euler