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261.
262.
E. G. Perkins T. P. McCarthy M. A. O’ Brien F. A. Kummerow 《Journal of the American Oil Chemists' Society》1977,54(7):279-281
A study of the separation of synthetic mixtures ofcis andtrans methyl octadecenoate with packed column gas chromatography indicated its usefulness for such analyses. Several margarines
were analyzed by this method and the results compared with those obtained by the infrared spectroscopic method. Reasonable
agreement between both methods was obtained, but the gas chromatographic determination yielded lower values (average 3.8%).
The presence oftrans unsaturation was also shown in selected samples of human milk and blood lipids. 相似文献
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264.
This paper describes a structured analytical approach for selecting a manufacturing technology. A framework consisting of six integrated steps is proposed by considering the growing importance of supply chains in manufacturing organisations. The framework makes use of the analytical hierarchy process (AHP) approach combined with strategic assessment model (SAM) to evaluate and select the technologies appropriate for providing overall competitive advantage. The framework is intended to assist industrial managers in promoting manufacturing and supply chain collaboration and co-ordination by including intra-organisational perspective in their organisational technology selection decision making process. 相似文献
265.
Pin-Chao Liao William J. O’Brien Stephen R. Thomas Jiukun Dai Stephen P. Mulva 《Canadian Metallurgical Quarterly》2011,27(4):229-235
Engineering performance has a major impact on subsequent project phases, such as procurement and construction, and thus, has the potential to affect the overall project outcome. This study utilizes metrics and a database from the Construction Industry Institute (CII) benchmarking and metrics program to investigate relationships between factors thought to affect direct engineering labor productivity during detailed engineering. Collaborating with industry practitioners, quantitative assessments were analyzed with industry input through various CII committee meetings and industry forums. Significant correlations are found between engineering productivity and project size, project type, project priority, and phase involvement. Correlations are also found between degree of modularization, funded front-end planning effort, and quality management and engineering productivity. These findings extend and, in some cases, contradict previous research. 相似文献
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Vincent Cregan Stephen B.G. O’Brien Jean P.F. Charpin Kevin Cronin 《Journal of food engineering》2013
An approximate cheese cylinder is cooled while partially submerged in a flowing brine solution. Microbiological considerations require the cheese to be cooled to 4 °C or less prior to packaging. Knowledge of the temperature evolution of the product is desirable from a manufacturing perspective, and we propose a model to describe the temperature time-history of a single cheese cylinder during cooling. The combination of unusual product geometry and the discontinuity in surface temperatures motivate the use of the finite element method (FEM). The FEM solution is used to describe the cooling process, and to ascertain the minimum time necessary for the cheese to attain the required packaging temperature. The FEM solution exhibits excellent agreement with the corresponding experimental findings. The discontinuity in surface temperatures has a significant influence on the cooling regime. Future process optimisation should focus on developing methods to increase the cheese surface area in contact with the brine. 相似文献