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1.
KEITH W. GATES JACKIE G. EUDALY AMANDA H. PARKER LAURA A. PITTMAN 《Journal of food science》1985,50(4):853-857
Chemical, microbiological, and sensory changes were monitored in breaded fantail shrimp held in upright and coffin style freezers at two retail markets and in a large warehouse freezer. Quality and nutritional changes in a test lot of shrimp were followed for 13 months. Significant sensory deterioration can be detected as early as 3 - 4 months after production when shrimp are stored in a retail freezer. Minimum retail freezer temperatures reached ≤-20°C between 1% and 36% of the monitored days and had daily temperature variations of 12 - 18°C. Storage at the wholesale level below -20°C with maximum daily temperature variations of 2 - 3°C proved to be an effective method to maintain the quality of frozen shrimp for at least 13 months of storage. 相似文献
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L'étudedecriteci-dessoussest acheveeen4étapes: 1. L'analysed'un postede travail en fonction dc ses exigences psycho-physiologiques. 2. La critique de son aménagement du point de vue de Teffort visuel et de la définition de l'aire de travail. 3. La transformation d'un poste servant de prototype selon quelques regies ergonomiques. 4. La verification de la valeur de cette transformation à l'aide d'un test de “fatigue” 相似文献
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Equivalent concentrations of polydextrose and sucrose had similar effects on phase transitions of wheat starch-water systems. Onset and peak gelatinization temperatures were increased similarly with the two solutes. This was true with varied water:starch ratios, varied concentrations of solute, and for batters prepared with the two solutes. Acesulfame K, cyclamate, and saccharin at low levels, as might be used in food products, had little effect on phase transitions of starch-water-solute systems. 相似文献
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ABSTRACT: In the face of increasing migration by Latinos to suburbs and multi‐scalar policies criminalizing immigrants, municipalities are increasingly confronting the question, Who has the Right to the Suburb? We seek to better understand how the tensions between suburbanites and Latino immigrants are addressed by municipal governments as immigration enforcement is increasingly rescaled to the local level. Case studies of Maywood and Costa Mesa in Southern California suggest responses are by no means similar and can actually be contrasting, given the city's historical trajectories, socio‐economic status, political leadership, and networks of activists. Suburban struggles are often assumed to be conservative and as a result are undertheorized as sites of liberatory struggle. While the urban realm remains the most visible stage of social movements, this paper suggests immigrant activism is increasingly being generated in suburbs, election‐based organizing can be an effective gateway to municipal level change, and seeking to expand or constrict the Right to the City necessarily entails multi‐scalar efforts. 相似文献
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LAURA GARDINI ALBERTO SERVIDA MASSIMO MORBIDELLI SERGIO CARRA 《Chemical Engineering Communications》2013,200(1-3):85-105
Mathematical models of packed-bed catalytic reactors are aimed to predict the conversions and temperature profiles in both fluid and solid phases within the reactor. Although very general models can be mathematically formulated, usually several simplifying hypothesis are introduced for the fluid phase and/or the solid phase, in order to overcome computational difficulties We describe in this paper a computational algorithm based on Orthogonal Collocation Method on finite elements, with elimination of the knot unknown functions, coupled with an integration method for stiff ordinary differential equations. This has been used in the development of a computer code, which allows us to find the transient behavior of the reactor by solving the equation relative to the external field, coupled with those describing the transient behavior in the catalyst particles, for a wide class of reactor models. The most general examined model includes axial dispersion in the external fluid phase, interphase mass and heat transfer resistances, intraphase mass resistance and any given kinetic scheme with complex reaction rate expressions. 相似文献
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This paper presents the most suitable image processing techniques being used at present for recognising features either lying on the seafloor or floating in the water column. The preprocessing methodology is already incorporated in the sonar system, and as we cannot access the raw data, it is not included in this paper. The studied images correspond to the Cabrera Archipelago, in the Mediterranean Sea. 相似文献
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LAURA A. IBÁÑEZ-CASTILLO JESÚS CHÁVEZ-MORALES MIGUEL A. MARIÑO 《Water Resources Management》1997,11(3):165-184
A methodology is presented for planning the operation of the Fuerte-Carrizo irrigation system in northwest Mexico. The system has two storage dams, two irrigation districts, and water transfer capabilities between both dams. The methodology uses a combination of linear programming (LP) and simulation. The LP model maximizes the net return of the farmers, subject to restrictions of the system, availability of water and land, and water transfer relationships. The simulation model is programmed as a microcomputer interactive package simulating the performance of the system. The methodology has proven to be a useful tool to assist those responsible for the operation of the irrigation system. 相似文献