Search

Abstract: In this study, a two-stage ultrafiltration (UF) membrane separation process on a pilot scale was introduced to resolve the shortcomings caused by the application of salt precipitation technique in the conventional process of Reactive Brilliant Blue KN-R production. The first stage was used for diafiltration and concentration of dye solution, and the second stage was applied to recover the dye from permeate of the first stage. Both the operating pressure and cross-flow velocity had significant and moderate effect on the permeate flux (24.9 to 129.7L·m−2·h−1) and salt rejection (26.9%–55.7%), but insignificant effect on dye rejection since the rejections were always higher than 99.5%. The two-stage UF membrane process exhibited good performance as the dye and salt concentrations in concentrate of first stage were 203 and 5.4g/L, and 67.1% of salt could be removed and the dye loss was negligible (0.1%) in the whole process. For a dye plant with a capacity of 1000 ton per year, the preliminary economic evaluation of an UF plant based on pilot scale showed that the cost of every ton of Reactive Brilliant Blue KN-R was US $154. [Copyright &y& Elsevier]

Copyright of Water Quality Research Journal of Canada (Canadian Association on Water Quality) is the property of Canadian Association on Water Quality and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

An explicit formula for the logarithmic Sobolev constant relative to real diffusions or to birth and death integer-valued processes is presented, under an asymptotical assumption for quantities naturally associated to Hardy's inequalities in this context. Taking into account exact comparisons between entropy and appropriate variances, the proof comes back to Poincaré's inequality situation. [ABSTRACT FROM AUTHOR]

Abstract: In this article we prove global existence and uniqueness result for the 2D Boussinesq system with non linear thermal diffusion in some critical spaces. [Copyright &y& Elsevier]

Copyright of Néphrologie & Thérapeutique is the property of John Libbey Eurotext Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract: Objective: Determining the conditions, which would allow us to apply bacterial antibiotic susceptibility tests directly to infected biological fluids and positive blood cultures and in accordance with the standard conditions of these tests. Methods: For infected fluids (N =23), a correlation was determined between the bacterial count observed by microscopic field on a cystopin centrifugation pellet and the dilution required to obtain bacterial inocula corresponding to those used in the standard antibiogram and E-test methods. For blood cultures detected positive with the BactALERT system (26 Enterobacteriaceae, 29 Staphylococcus and 11 Pneumococcus), the broth dilution required to obtain such inocula was determined for each bacterial type. Results: For infected fluids, the dilution required for the antibiogram of enterobacterial and staphylococcal isolates was respectively of 10−1 and 100 when there were 50 to 100 bacteria/field, 10−2 and 10−1 for 100 to 500, 10−3 and 10−2 for 500 to 1000, and 10−4 and 10−3 for>1000. A minimum of 50 to 100 bacteria/field was required to determine β-lactam MICs towards a pneumococcal isolate present in cerebrospinal fluid. For blood cultures, a broth dilution of 10−4 for Enterobacteriaceae and of 10−2 for Staphylococcus and Pneumococcus allowed to reproduce the standard antibiogram. To reproduce the standard conditions of the E-test method for β-lactam MICs towards a pneumococcal isolate, the broth dilution was 10−1. Conclusion: Following the procedure described, antibiotic susceptibility can be available 24 h earlier. [Copyright &y& Elsevier]

Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract: We propose an analytical and numerical study of the combined action of the thermodiffusion and the convection in a binary mixture. The combination of these two phenomena is called thermogravitational diffusion. We are interested in quantifying the separation in a horizontal parallelepipedic cavity filled with a binary mixture and subjected to a constant horizontal temperature gradient on the two horizontal walls, the other walls being thermally insulated and impermeable. This new procedure is different from the classical one where the cavity is vertical and differentially heated on the two vertical walls. To cite this article: B. Elhajjar et al., C. R. Mecanique 334 (2006). [Copyright &y& Elsevier]

Copyright of IBS, Immuno-analyse & Biologie Specialisee is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract: One promising strategy to control the interactions between biomaterial surfaces and attaching cells involves grafting of adhesion peptides as RGD peptides (R: arginine; G: glycine; D: aspartic acid) to materials on which protein adsorption, which mediates unspecific cell adhesion, is essentially suppressed. This review gives an overview of RGD modified materials, that have been used for cell adhesion, and provides information about technical aspects of RGD immobilization on materials. The impacts of RGD peptide surface density, spatial arrangement as well as integrin affinity and selectivity on cell responses like adhesion and migration are discussed. We have tried to relate one of numerous scientifics adventures initiated by Charles Baquey within our laboratory. This review is dedicated to him for his enthusiasm in the development of project and for his wish of always leading of a professional blooming of his students. [Copyright &y& Elsevier]

Copyright of Canadian Journal of Chemical Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Implantodontie is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of EMC-Medecine is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The “2002 Apheresis” Group was commissioned by the President of the E´tablissement franc¸ais du sang to carry out a study on the national stock of automated apheresis devices and think about a method to harmonize techniques. The objective was twofold: to facilitate the initiation of public procurement procedures as well as to streamline the stock and to match practices. The members of the “2002 Apheresis” group first carried out an inquiry based on a nationwide questionnaire. They analyzed and compared the performances of the various separators. They also consulted suppliers on their short-term (2 years) projects. They finally met all regional apheresis correspondents. The group was then able to make suggestions to organize this activity as a part of a national apheresis scheme. Lastly, they helped devising public procurement procedures for the coming two years. This group is going to obtain a long-term recognition with the creation of a “Collection Group” conducted by the Scientific and Medical directors board at the E´tablissement franc¸ais du sang. [Copyright &y& Elsevier]

The objective of this research was to compare the efficiency of different natural adsorbents for lead recovery from basic leachate produced during municipal incinerator used lime decontamination. Shake flasks adsorption tests have shown that cedar barks, pine barks, cocoa shells, and peat moss are efficient and cheap adsorbents for lead removal from this type of leachate. Peanut skins are less efficient than other tested natural materials. The use of a hot-acid treatment (H[sub 2] SO[sub 4] 0.75 M) allows to slightly increase lead removal performance of the adsorbents. However, this gain does not justify, from an economical point of view, the utilization of the chemical treatment. Tests done with different cedar and pine bark concentrations (2–30 g/L) have revealed that heavily lead-contaminated (approximately 130–140 mg/L) used lime leachate can be efficiently treated by addition of a small adsorbent concentration (e.g. 2 g/L). Finally, elution tests (HCl 0.5 M) with reuse of adsorbents have demonstrated that some natural materials, like cedar barks and cocoa shells, can be used for many adsorption–elution cycles without loss of lead removal efficiency. Key words: lead, adsorption, used lime, leaching, peat, bark.[Journal translation]Cette recherche visait à comparer l'efficacité de divers adsorbants naturels pour la récupération du plomb extrait par lessivage basique de chaux usées d'incinérateur de déchets municipaux. Les tests d'adsorption effectués en fioles agitées ont montré que les écorces de cèdre, les écorces de pin gris, les écailles de cacao, ainsi que la tourbe de sphaigne sont des adsorbants efficaces et peu coûteux pour l'enlèvement du plomb de ce type d'effluent très basique. Les écailles d'arachides se sont avérées moins efficaces que les autres adsorbants testés. L'application d'un pré-traitement acide (H[sub 2] SO[sub 4] 0,75 M) à chaud permet d'accroître légèrement les rendements d'élimination du plomb des adsorbants. Les gains obtenus ne justifient toutefois pas l'utilisation de ce traitement chimique. Les tests effectués avec diverses concentrations (2 à 30 g/L) d'écorces de pin gris et de cèdre ont montré qu'il est possible de traiter efficacement les lixiviats de chaux usées chargés en plomb (environ 130 à 140 mg/L) par un apport de faibles quantités d'adsorbants, soit de l'ordre de 2 g/L. Finalement, des essais d'élution (HCl 0,5 M) et de réutilisation des adsorbants ont démontré que certains adsorbants, tels que les écorces de cèdre et les écailles de cacao, peuvent être employés pour plusieurs cycles d'adsorption–élution sans perdre leur capacité d'enlèvement du plomb. Mots clés : plomb, adsorption, chaux usées, lixiviation, tourbe, écorce. [ABSTRACT FROM AUTHOR]

The method presented in this article permits rapid analysis of the composition of proteinaceous and fatty painting media. his possible to obtain the volatile derivatives of amino and fatty acids in a few seconds, at room temperature and in the presence of water: their separation takes only a few minutes. Using this method it is possible to record the amino acid and fatty acid chromatograms simultaneously. Analytical results are presented for proteinaceous media such as cows milk, casein, egg shire and yolk, gelatine, and for fatty media such as linseed, walnut and poppyseed oil. Each type of medium can be identified from the information in the relevant chromatogram, and it may be possible to develop a method for the analysis of mixed media, for example tempera. [ABSTRACT FROM AUTHOR]

Copyright of Revue Nouvelle is the property of Revue Nouvelle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

One examines the order of magnitude of the speed of separation of optically active molecules bearing a permanent dipole under the effect of a rotating electric field. To cite this article: Y. Pomeau, C. R. Physique 3 (2002) 1269–1271. [ABSTRACT FROM AUTHOR]

Copyright of Néphrologie & Thérapeutique is the property of John Libbey Eurotext Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Néphrologie & Thérapeutique is the property of John Libbey Eurotext Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)