Judul: Kajian Kualitas Produk Susu Pasteurisasi Hasil Penerapan Rantai Pendingin.
Abstrak: PT D-Farm Agriprima, peternakan sapi perah Kawasan Usaha Peternakan (KUNAK) Cibungbulang, dan outlet milkshake kaki lima merupakan satu rantai produksi pengolahan susu pasteurisasi yang produknya dikonsumsi setiap hari oleh konsumen. Penerapan rantai pendingin merupakan hal yang penting dilakukan untuk menjamin keamanan dan kualitas produk. Tujuan penelitian ini adalah mengkaji kualitas produk susu pasteurisasi hasil penerapan rantai pendingin. Penelitian dilakukan sepanjang rantai produksi susu pasteurisasi dari peternakan ke konsumen terdiri atas susu segar peternakan sapi perah Kawasan Usaha Peternakan (KUNAK) Cibungbulang (P1), susu segar bahan baku (P2), susu pasteurisasi (P3), dan stok susu pasteurisasi PT D-Farm Agriprima (P4), sampai dengan milkshake produksi awal (P5) dan milkshake produksi akhir outlet kaki lima (P6). Analisis peubah yang dilakukan meliputi analisis fisikokimia seperti berat jenis, pH, lemak, protein, bahan kering, dan bahan kering tanpa lemak serta analisis kualitas mikrobiologi seperti Total Plate Count, Escherichia coli, dan Staphylococcus aureus. Hasil penelitian menunjukkan bahwa susu segar KUNAK, susu segar dan susu pasteurisasi PT D-Farm Agriprima, serta milkshake outlet kaki lima memenuhi kualitas pH, kadar protein, dan kadar lemak berdasarkan SNI 3141.1:2011 tentang susu segar dan SNI 01-3951-1995 tentang susu pasteurisasi. Hanya sampel susu pasteurisasi PT D-Farm Agriprima (P3) yang memenuhi kualitas mikrobiologi berdasarkan SNI 01-6366-2000 tentang batas maksimum cemaran mikroba dan batas maksimum residu dalam bahan makanan asal hewan.
Keyword: fisikokimia, mikrobiologi, rantai pendingin, susu

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.
Keyword: 

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
Keyword: