Judul: Kajian Mutu Minuman Susu Jahe Merah Dengan Kemasan Botol PET Selama Penyimpanan
Abstrak: Zingiber officinale Roscoe var. Rubrum or commonly known as red ginger is mostly used as herbal or medicinal products. UMKM Narasa is a home-based industry which is using the red ginger as the main composition of food product, that is red ginger milk beverage. The use of PET bottle for the packaging of red ginger milk beverage can help in extending the shelf life for 9 days. The quality microbiologically is determined in the total number of microbes for red ginger milk beverage by 6 x 102 colonies/ml. Proximate analysis showed the red ginger milk beverage consists of 84.73 % water, 0.46 % ash, 1.85 % fat, 0.54 % protein, and 12.42 % carbohydrate. The antioxidant activity using DPPH method showed the activity of antioxidant for red ginger milk beverage on its capabilty to reduce the free radical but in the high concentration. IC50 values of the red ginger milk beverage is 1142.08 mg/ml, this value can classify the activity of antioxidant in red ginger milk beverage as a very weak activity.
Keyword: Bogor Agricultural University (IPB), PET bottle, packaging, red ginger

Judul: Peningkatan Mutu Dan Penerapan Cara Produksi Pangan Yang Baik Pada Industri Rumah Tangga Pangan Minuman Jahe Merah Instan Di Desa Benteng, Ciampea, Bogor
Abstrak: Red ginger have been processed into several foods and beverages, such as instant beverage, ginger candy, ginger pickle, ginger coffee, etc. One of household industry that produces instant red ginger beverages is Jahe Gunung Leutik in Ciampea, Bogor. But, the household industry is still has not applying good manufacturing practices and it is still not has standard formula. Therefore, it is need a deep study to determine the standard formula and to apply manufacturing practices in order to get P-IRT certificate from health department. The methods that used in deciding the best formula are analysis of rehydration time, analysis of color, and hedonic test. The formula that used in the test was formula with ratio sugar and red ginger 1:2 (A), 1:1 (B), and 1:3 (C). After that, product from the best formula will be analyzed with proximate analysis in order to meet the requirement of P-IRT certificate’s submission. Moreover, feasibility analysis will be undertaken in this industry. The results showed that rehydration time in all three samples still include in instant beverages because its rapid rehydration time. Color analysis and hedonic test also showed no significant differences between the samples. Therefore, the formula with the ratio of 1:3 was chosen because it is the cheapest material usage. Moreover, Standard Operating Procedure (SOP) that controlled several aspect on industry from purchasing raw materials, production processes, until product shipment has been created according to the obtained formula. The best formula obtained from this experiment is analyzed its chemical composition and the results of moisture content, ash content, fat content, protein content and carbohydrate content are 1.16%, 1.17%, 0.08%, 0.46%, and 97.13% respectively. And after following several processed of certification, the household industry got the P-IRT number as follow 61232010110099. Feasibility analysis also undertaken by this household industry and the conclusion is this industry is feasible from the financial side.
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: