3,158 research outputs found

    β-Cyclodextrin/lecithin: preparation and characterization

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    Lecithin is a fat which is well-known to be obtained from soybeans or egg yolks. It is also taken as a medicine and used as food additive that keep certain ingredients from separating out. Despite of its advantages, lecithin’s application in the industries is restricted due to its sensitivity to heat and light and can be easily oxidized. Hence, this study aims to investigate the effect of β-cyclodextrin (β-CD) in improving the properties of lecithin. The objectives of this study are to prepare and characterize β-CD/lecithin complex followed by study on the influence of β-CD on lecithin’s thermal stability and antioxidant property. Analytical methods employed are fourier transform infra-red (FTIR) spectroscopy for chemistry study, differential scanning calorimetry (DSC) for examination of its thermal stability, DPPH testing for its antioxidant property as well as scanning electron microscopy (SEM) for structural examination. Results from FTIR and SEM analyses confirmed the formation of β-CD/lecithin complex. Thermal stability and antioxidant property of the complexes on the other hand were found to be improved. Of the amount of β-CD studied, it was reported that the best combination of the complex was at β-CD/lecithin ratio of 2:1. The complex of the optimized ratio showed the greatest thermal stability as indicated by its highest melting point (177.8 ºC). The complex also exhibited the greatest antioxidant property as indicated by its highest percentage of DPPH scavenging activity that is 97.1%

    Spartan Daily, March 4, 1991

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    Volume 96, Issue 24https://scholarworks.sjsu.edu/spartandaily/8092/thumbnail.jp

    Spartan Daily, March 5, 1990

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    Volume 94, Issue 26https://scholarworks.sjsu.edu/spartandaily/7956/thumbnail.jp

    Distributed Access Control with Blockchain

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    The specification and enforcement of network-wide policies in a single administrative domain is common in today's networks and considered as already resolved. However, this is not the case for multi-administrative domains, e.g. among different enterprises. In such situation, new problems arise that challenge classical solutions such as PKIs, which suffer from scalability and granularity concerns. In this paper, we present an extension to Group-Based Policy -- a widely used network policy language -- for the aforementioned scenario. To do so, we take advantage of a permissioned blockchain implementation (Hyperledger Fabric) to distribute access control policies in a secure and auditable manner, preserving at the same time the independence of each organization. Network administrators specify polices that are rendered into blockchain transactions. A LISP control plane (RFC 6830) allows routers performing the access control to query the blockchain for authorizations. We have implemented an end-to-end experimental prototype and evaluated it in terms of scalability and network latency.Comment: 7 pages, 9 figures, 2 table

    Acknowledgement Patterns in Research Articles: a Bibliometric Study based on Journal of Natural Rubber Research 1986-1997

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    Analyses the acknowledgements included in the research articles and short communications published in Journal of Natural Rubber Research (1986-1997) in respect of types, frequency of occurrence, individuals acknowledged, etc. Results indicate that 74% items contain acknowledgements; an average acknowledgement per item is 2.2; the most common type of acknowledgments relates to technical support. Peer interactive communication accounts for 44% of the total acknowledgements. The result of the study substantiates the earlier findings that a small number of individuals are highly acknowledged and the rest are acknowledged infrequently

    Spartan Daily, April 11, 1984

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    Volume 82, Issue 51https://scholarworks.sjsu.edu/spartandaily/7169/thumbnail.jp

    Spartan Daily, October 3, 1989

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    Volume 93, Issue 22https://scholarworks.sjsu.edu/spartandaily/7882/thumbnail.jp

    Spartan Daily, December 11, 1990

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    Volume 95, Issue 68https://scholarworks.sjsu.edu/spartandaily/8067/thumbnail.jp

    Spartan Daily, September 2, 1983

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    Volume 81, Issue 5https://scholarworks.sjsu.edu/spartandaily/7055/thumbnail.jp

    The Feasibility of Using Expert Systems in the Management of Human Resources

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    The purpose of this paper is to introduce a decision aid that is being used increasingly in the business world, the expert system, and to begin to examine its potential for human resource management. First, the expert system technology is reviewed, with a special emphasis on the players, those involved in developing and using the system, and the parts, the three main components of a system. This is followed by an analysis of the costs and benefits and the advantages and disadvantages that have been ascribed to expert systems. We conclude this initial research endeavor by presenting some preliminary findings which suggest that employees are willing to cooperate with expert systems, even those that require personal information, and that they see some benefits to using expert systems as decision aids
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