Judul: Determination of quality degradation rate of milk powder -  type-x at various temperature in pt frisian flag Indonesia,  Jakarta
Abstrak: One of the processed milk is milk powder. Milk powder contains many components of food and become a good nutrition source for the body but it can damage easily. Its needs to be identified how the quality degradation rate to prevent further deterioration of milk powder during storage. The objective of this research is determination of quality degradation rate of milk powder-type-X at various temperature. The products were kept at 30°C, 40°C, and 55°C for six weeks of storage. Initial analysis has been done to determine critical parameters that increased milk powder damaged. The results show free fat, peroxide value and insolubility index as major damaged of milk powder. Quality degradation rate of milk powder-type-X followed zero order reaction for free fat and insolubility index. Order reaction of peroxide value cannot be determined because the deterioration has not reached 50% of the final quality value. Deterioration of milk powder-type-X is influenced by internal conditions of milk powder, analysis procedures, and intensity of analysis. Based on models accuracy test with MRD value obtained zero order reaction of peroxide value at 30oC, first order reaction of peroxide value at 55oC, and zero order reaction of free fat value at 40oC rather describe the quality degradation rate of milk powder-type-X.
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Judul: Kajian Mutu Produk Susu Pasteurisasi Di Unit Pengolahan Susu Fakultas Peternakan Institut Pertanian Bogor
Abstrak: Food safety is very important point in the food production. Milk is a natural source food with high nutrient content, but has a characteristic as perishable product and a good medium for the growth of microorganism. Pasteurization is one of method for prolong the shelf life time of product. The purpose of pasteurization is to destroy pathogen bacteria without affecting the taste, flavor, and nutritional value. High quality milk product must be considered from farm, during processing up to final product. That can get from quality of raw material and processing of milk pasteurized. The aim of this apprentice concern to study of quality pasteurized milk in processing milk unit PT D-Farm Agriprima. Based on the results of testing raw milk as raw material on processing milk pasteurized showed that had normal color, smale and taste, alcohol test is negative, density 1,030 g/cm3 , fat 3,32% , protein 3,51%, degree of acidity 8,19oSH, TPC 1x103,38 CFU/ml, Salmonella dan E.coli are negative, lead (Pb) <0,048 ppm dan zinc (Zn) 4,18 ppm. The result test of final produk with vanilla flavor showed that had normal color, smale and taste, fat 2,39%, Solid non Fat 13,8%, protein 2,78%, TPC <10 CFU/ml, Coliform <3 MPN/ml, arsen (As) <0,003 ppm, lead (Pb) <0,055 ppm, copper (Cu) 0,04 ppm dan zinc (Zn) 1,75 ppm. Quality of raw milk and final product were analyzed using fishbone diagram (causal diagram) to determine the factors that will influence it. The factors were categorized into four main factors, there are material, human resources, method and environment. From this main factors can be found detailed factors that will be effects the quality of raw milk and pasteurized milk. The great factors that affect the quality of raw milk are the lactation cow (nation, genetic and conditions), food (quality and quantity), milking (procedures and sanitation), employees (sanitation and discipline) and environment hygiene. The great factors that affect the quality of pasteurized milk are the raw material (quality), processing production, testing the quality of final product (physical, chemical, microbiological), employees (sanitation and discipline) and environment hygiene.
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf