Judul: Pengembangan Produk Makanan Ringan Dengan Proses Ekstrusi Dan Penggorengan
Abstrak: A typical Indonesian meal is based on rice cooked alone or prepared with sambal, a hot chili condiment ; it is served with krupuk (crackers made of flour , vegetables and meat , shrimp or spices) .Some local dishes such as Soto and Oxtail Soup are topped with fried shallot and crackers (something crispy and crunchy). The purpose of this experiment is to develop crackers which can be function as snacks alone or as seasoned fried toppings for eating with rice or other basic meal. In soupy dish, this toppings can turned to a synthetic meat which has a plastic or elastic and full body mouth feel. Available equipment in the company which has high technical possibility to produce this snacks are several extruders in the rice noodle (bihun) line and snack extruder (third generation snacks or pellets). The best process design is needed to produce a crispy snacks by using one prototype formula consists of ground catfish (Clarias batrachus L) meat and tofu (function as protein source), cassava flour (gaplek). The best prototype from laboratory scale formulation process has protein content 14 %, tasty and enough saltiness level and crispy texture. Raw material cost estimation per kg product dough cost from Rp.5.895,- to Rp.6.765,-. The combined process of rice noodle extruder with meat processor or meat chopper extruder, produced the best crispiness product after frying process with production capacity 500 kg/hour. The study of comparing the effect of dough temperature prior to extrusion process and the impact of meat processors or meat chopper extruder (MCE) in producing a crispy product was made by using the same frying condition 150° C ~ 3 minutes in a continuous noodle fryer. Proof on the crispiest texture is based on texture analysis on crispiness level. The higher the value of kgf for a product, the crispier the texture is. Duncan statistical calculation differentiates the process flow into 7 crispiness groups. The highest value of kgf is 93.2 and the lowest value is 24.49. Minimum value which considered as crispy is 50-55 kgf. Extrusion process begins with maximum 30 °C dough through strap extruder (bihun Line) then followed by MCE produced the crispiest texture. Cool dough (maximum 30 °C) significantly produced crispier texture than hot dough (60-90 °C). Based on Contrast Orthogonal Test, process followed with MCE and without MCE is significantly different at significance level <0.0001<0.05. Product texture made of extrusion process followed with MCE is perceived as significantly crispier if compared to that of extrusion process without MCE. Supporting studies of exposing product on top of soupy dishes (as topping) such as instant noodle at certain timing showed that the crispier the texture, the faster water absorption into the capillary of product structure.
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Judul: Studying the effect of substitution level of different types of flour on the snack extrusion product characteristics
Abstrak: One application of extrusion technology in the field of food processing is the manufacture of snack food (snacks). The raw material is a very role in the quality of extrusion products. Various types of materials substitution in the form of flour was used in this research to study the interaction with the main raw material in the form of particles of corn and its influence on the characteristics of the extruded snack products. The research conducted consisted of two parts, the preliminary research and primary research. Preliminary study aimed to explore the appropriate extrusion process conditions. The determined process conditions is a feed screw speed, extruder screw speed, barrel temperature (T 1, T 2, T 3), and feed moisture content. The primary research is the manufacture of extruded products with substitution treatment consisting of two degree of concentration of three types of flour substitution (5%, 10%). The conducted analysis of the product is water content (before and after drying), texture (hardness), the degree of gelatinization, water absorption index (WAI), water solubility index (WSI), the degree of expansion, bulk density, and organoleptic test (hedonic).
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular