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排序方式: 共有626条查询结果,搜索用时 15 毫秒
31.
Kamel Eddine El Mecherfi Djamel Saidi Omar Kheroua Ghazalia Boudraa Mahmoud Touhami Olivier Rouaud S��bastien Curet Yvan Choiset Hanitra Rabesona Jean-Marc Chobert Thomas Haertl�� 《European Food Research and Technology》2011,233(5):859-867
Effect of combined microwave (MW) and enzymatic hydrolysis on the human immunoglobulin E (IgE)-binding properties of ??-lactoglobulin (??-lg) and other whey proteins (WP) was investigated. Separated ??-lg and full whey protein isolate (WPI) were hydrolyzed with trypsin, chymotrypsin, mixture of trypsin/chymotrypsin, and pepsin at three microwave power levels: 50?W during 1 and 5?min, 100 and 200?W during 1 and 3?min. The immunoreactivity of the obtained hydrolysates resulting from combined microwave protease treatment was assessed using sera of young patients allergic to bovine whey proteins. The application of microwave treatment at 200?W enhances the hydrolysis of ??-lg by pepsin in 3?min and decreases significantly its immunoreactivity. The extensive hydrolysis of the microwave-treated ??-lg and WPI with trypsin, chymotrypsin, and the mixture of trypsin with chymotrypsin did not have an impact on the IgE binding of the products obtained in all the studied conditions. 相似文献
32.
33.
Mohamed Kamel Hadj-Kali Vincent Gerbaud Patrick Lovera Olivier Baudouin Pascal Floquet Xavier Joulia Jean-Marc Borgard Philippe Carles 《International Journal of Hydrogen Energy》2009
A model for the Bunsen section of the Sulfur–Iodine thermo-chemical cycle is proposed, where sulfur dioxide reacts with excess water and iodine to produce two demixing liquid aqueous phases (H2SO4 rich and HI rich) in equilibrium. Considering the mild temperature and pressure conditions, the UNIQUAC activity coefficient model combined with Engels' solvation model is used. The complete model is discussed, with HI solvation by water and by iodine as well as H2SO4 solvation by water, leading to a very high complexity with almost hundred parameters to be estimated from experimental data. Taking into account the water excess, a successful reduced model with only 15 parameters is proposed after defining new apparent species. Acids total dissociation and total H+ solvation by water are the main assumptions. Results show a good agreement with published experimental data between 25 °C and 120 °C. 相似文献
34.
Clémentine Cornu Vincent Chapurlat Jean-Marc Quiot François Irigoin 《Annual Reviews in Control》2012,36(2):300-308
Increasing competition on markets induces a vital need for companies to improve their efficiency and reactivity. For this, a solution is to deploy, improve and manage their processes while paying a special attention on the abilities of the resources those involve. Particularly, their interoperability is considered in this article as a challenge conditioning the success of the deployment. Consequently, this paper provides a comparison of existing interoperability assessment solutions and presents a methodology to assess interoperability of people, material resources and organisation units involved or that could be involved in a process, all along the deployment effort. This methodology is usable for prevention, detection and correction of interoperability problems. 相似文献
35.
Assaad Jean-Marc; Pihl Robert O.; Séguin Jean R.; Nagin Daniel S.; Vitaro Frank; Tremblay Richard E. 《Canadian Metallurgical Quarterly》2006,14(3):377
This study examined the association between the heart rate (HR) response to alcohol intoxication, which is thought to reflect sensitivity to alcohol-induced reward and alcohol-induced behavioral disinhibition. High- and low-HR responders to alcohol participated in a go/no-go task, under sober and intoxicated conditions. Errors of commission on this task have previously been related to behavioral disinhibition. High-HR responders made more intoxicated commission errors as compared with low-HR responders. High-HR responders also reported increased alcohol consumption, and controlling for the latter did not alter the significant association between high-HR responders and increased intoxicated errors of commission. These results are consistent with previous findings of an increased risk for addictive and disinhibited behavioral propensities in individuals with a high-HR response to alcohol intoxication. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
36.
Sylvie Trudel Jean-Marc Lavoie Marie-Claude Paré Witold Suryn 《Software Quality Journal》2006,14(1):7-23
Many small software organizations have recognized the need to improve their software product. Evaluating the software product
alone seems insufficient since it is known that its quality is largely dependant on the process that is used to create it.
Thus, small organizations are asking for evaluation of their software processes and products. The ISO/IEC 14598-5 standard
is already used as a methodology basis for evaluating software products. This article explores how it can be combined with
the CMMI to produce a methodology that can be tailored for process evaluation in order to improve their software processes.
SM: CMMI is a service mark of Carnegie-Mellon University.
Sylvie Trudel has over 20 years of experience in software. She worked for more than 10 years in development and implementation of management
information systems and embedded real-time systems. Since 1996, she works as a process improvement specialist, implementing
best practices into organizations processes from CMM and CMMI models. She performed several CMM and CMMI assessments and participated
in many other CMM assessments such as CBA IPI, SCE, and other proprietary methods. She obtained a bachelors degree in computer
science in 1986 from Laval University in Québec City and a Masters degree in Software Engineering at école de Technologie
Supérieure (éTS) in Montréal. Sylvie is currently working as a software engineering advisor at the Centre de Recherche Informatique
de Montréal (CRIM).
Jean-Marc Lavoie has been working in software development for over 10 years. He performed and published a comparative study between the guide
to the SWEBOK and the CMMI in 2003. Jean-Marc obtained a bachelor degree in Electrical Engineering. He is pursuing a Masters
degree in Software Engineering at école de Technologie Supérieure (éTS) in Montréal while working as a software architect
at Trisotech.
Marie-Claude Pare has been working in software development for 7 years. Marie-Claude obtained a bachelor degree in Software Engineering from
école Polytechnique in Montréal. She is pursuing a Masters degree in Software Engineering at école de Technologie Supérieure
(éTS) in Montréal while working as a software engineer at Motorola GSG Canada.
Dr Witold Suryn is a Professor at the école de technologie supérieure, Montreal, Canada (engineering school of the Université du Québec network
of institutions) where he teaches graduate and undergraduate software engineering courses and conducts research in the domain
of software quality engineering, software engineering body of knowledge and software engineering fundamental principles. Dr
Suryn is also the principal researcher and the director of GELOG : IQUAL, the Software Quality Engineering Research Group
at école de technologie supérieure. From October 2003 Dr. Suryn holds the position of the International Secretary of ISO/IEC
SC7 – System and Software Engineering. 相似文献
37.
Le Roux B Conan JM Kulcsár C Raynaud HF Mugnier LM Fusco T 《Journal of the Optical Society of America. A, Optics, image science, and vision》2004,21(7):1261-1276
Classical adaptive optics (AO) is now a widespread technique for high-resolution imaging with astronomical ground-based telescopes. It generally uses simple and efficient control algorithms. Multiconjugate adaptive optics (MCAO) is a more recent and very promising technique that should extend the corrected field of view. This technique has not yet been experimentally validated, but simulations already show its high potential. The importance for MCAO of an optimal reconstruction using turbulence spatial statistics has already been demonstrated through open-loop simulations. We propose an optimal closed-loop control law that accounts for both spatial and temporal statistics. The prior information on the turbulence, as well as on the wave-front sensing noise, is expressed in a state-space model. The optimal phase estimation is then given by a Kalman filter. The equations describing the system are given and the underlying assumptions explained. The control law is then derived. The gain brought by this approach is demonstrated through MCAO numerical simulations representative of astronomical observation on a 8-m-class telescope in the near infrared. We also discuss the application of this control approach to classical AO. Even in classical AO, the technique could be relevant especially for future extreme AO systems. 相似文献
38.
Some odorant lactones are naturally present in fruits or in fermented products; they can also be used as food additives and can be produced by microorganisms at the industrial scale by biotechnological processes. Gamma-decalactone was previously shown to have antimicrobial properties. We determined by infrared spectroscopy measurements that this compound rapidly diffused into model phospholipid bilayers (within 2 min), modifying the general physical state of a dimyristoyl-L-alpha-phosphatidylcholine (DMPC) film. In vivo, the lactone strongly increased membrane fluidity in the model yeast Yarrowia lipolytica, as evaluated by fluorescence anisotropy measurements. This effect was more important than that of benzyl alcohol, which is known as a fluidizing agent in living cells, and may explain the toxic action of gamma-decalactone in microorganisms. 相似文献
39.
When three dimensional measurements are conducted with fringe projection, the quality of the grating used for the generation of the fringes is important. It has a direct influence on the achievable depth resolution in a given measurement setup. In the past, Ronchi grating or gratings written in nematic liquid-crystal displays or in digital micromirror devices have been used. We report on the application of a reflective ferroelectric liquid-crystal-on-silicon display as the fringe-generating element in a setup based on a stereo microscope. With this device the depth resolution of measurements by use of phase-shifting algorithms can be significantly improved compared with the application of a Ronchi grating or a nematic liquid-crystal display. 相似文献
40.
Kouamé D Girault JM Patat F 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》2003,50(3):257-266
Real-time flow velocity measurement is a practical issue in industrial and biomedical applications. Because their good frequency resolution, parametric methods such as autoregressive (AR) modeling and time-frequency distributions (TFD) are generally preferred to Fourier analysis. However, these methods become highly inaccurate in the presence of colored noise. We review here the principal parametric and nonparametric techniques and show their limitations in the estimation of Doppler frequency in the presence of strong colored noise. Different solutions to overcome these limitations are then proposed and compared using synthetic Doppler signals with colored noise. 相似文献