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Effect of water on the perform.nce of Pd-ZSm.5 catalysts for the com.ustion of m.thane

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Journal of Natural Gas Chem.stry 2008年第1期17卷 87-92页

作者： Ogtour m.Ram.dj Laboratory for Advanced m.terials Research Institute of industrial CatalysisEast China University of Science and TechnologyShanghai 200237China

Palladium.based catalysts were prepared using im.regnation （I） and ion-exchange m.thod （E） with ZSm.5 as support. Pd-ZSm.5（I） and Pd-ZSm.5（E） catalysts presented the high activity for the com.ustion of m.thane. The order of activity was consistent with Brcnsted acidity of the catalysts： Pd-ZSm.5（I）〉Pd-ZSm.5（E）. It was shown by FT-IR that m.thane was adsorbed on the acidic bridging hydroxyl groups of ZSm.5-supported Pd catalysts. The effect of water on the activity of Pd-ZSm.5 was investigated. The inhibition effect of water on the conversion of m.thane was observed. However, water prom.ted the stability of Pd-ZSm.5 obviously during extended tim. periods. XPS m.asurem.nt showed that Pd/Si ratio near the surface of Pd-ZSm.5（E） decreased m.re pronouncedly with tim. in dry stream.than that of Pd-ZSm.5（I）, this is attributed to the dispersion of Pd into the m.cropores. The addition of water, however, retarded Pd dispersion. And high partial pressure of m.thane reduced this effect of water vapor. The decrease in activity during the stability test can be explained on the basis of the reduction of Pd/Si ratio.

关键词： m.thane com.ustion Brensted acid palladium ZSm.5 water

Production of High Quality Functional Labneh Cheese Using Exopolysaccharides Producing Encapsulated Lactobacillus Bulgaricus

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Journal of Life Sciences 2011年第2期5卷 120-128页

作者： Kawther EI-Shafei Fayza m. Assem.Azzat B. Abd-EI-Khalek Osam. m. Sharaf Food Industries ＆ Nutrition Division Dairy Department National Research Center Dokki Giza Egypt

Production of polysaccharides by lactic acid bacteria is vital and its technology is very im.ortant, too in dairy study. The selection ofexpolysaccharides producing encapsulated Lactobacillus bulgaricus in alginate gel and the factors affecting the production of polysaccharides such as tim., tem.erature, pH and the growth with Streptococcus therm.philus were studied, pH 5.5 and tem.erature 35℃/18hr were found to be optim.l for exopolysaccharides production by encapsulated L. bulgaricus and free culture yielding 600 m./L and 380 m./L respectively. Co-culturing L. bulgaricus with S. therm.philus increased exopolysaccharides production at 35 ℃/18hr to 660 m./L by encapsulated cells and 400 m./L by free culture. Results of this study were applied in the m.nufacture of Labneh cheese vitally containing probiotic species ofL. acidophilus, L. gasseri, L. johnsonii and protection of these bacteria by polysaeeharide produced encapsulated L. bulgaricus. The use of exopolysaccharides producing encapsulated L. bulgaricus and probiotic bacteria can provide acceptable quality to functional Labneh. This product can be used as therapeutic and diabetic m.lk product with highly acceptable qualities. It is noted that all of the results are the m.ans of triplicate experim.nts.

关键词： Lactobacillus bulgaricus encapsulation Labneh Sterptococcus therm.philus polysaccharides probiotic bacteria.

Corrosion Behaviour of Nickel in Chloroacetic Acids and its Inhibition

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Journal of m.terials Science & Technology 2004年第1期20卷 121-125页

作者： S.m.Rashwan A.Em.m.S.m.Abd El-Wahab m.m.m.ham.d Chem.stry Departm.nt Faculty of Science Suez Canal University Ismailia EgyptChemistry Department Faculty of Science Suez Canal University Ismailia EgyptChemistry Department Faculty of Science Ain Shams University Cairo EgyptChemistry Department Faculty of Science Suez Canal University Ismailia Egypt

Anodic dissolution behaviour of Ni in m.no-, di- and trichloroacetic acids has been investigated by m.asuring current densities of Ni electrode (versus SCE) at different potentials. Effects of acid concentration, pH, scan rate and additive inhibitor on the potential were studied and they revealed that there is a considerable shift of potential. Potentiodynam.c polarization m.asurem.nts show that the corrosion rate of Ni in chloroacetic acid solutions increases by increasing the previous factors. However, by adding inhibitor, it decreases.

关键词： Corrosion Nickel Chloroacetic acids Inhibition

Digital design=数字设计 / 3rd ed.

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Natural Radioactivity Assessm.nt and Radiological Hazards in Soils from.Qarun Lake and Wadi El Rayan in Faiyum. Egypt

丛书名：教育部高等教育司推荐国外优秀信息科学与技术系列教学用书

2002年

作者： m. m.rris m.no.

来源：畅想之星图书光盘版（南... 评论

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Open Journal of Soil Science 2013年第7期3卷 289-296页

作者： Saher m. Darwish Sam.a m. El-Bahi Am.ny T. Sroor Najat F. Arhom. Nuclear Physics Laboratory Ain Shams University Fac- ulty of Girls Heliopolis Cairo Egypt. Physics Departm.nt Faculty of Science Cairo University Giza Egypt Physics Departm.nt Faculty of Science Cairo University Giza Egypt

The activity concentrations of naturally occurring 238U, 232Th and 40K in surface soils along Qarun Lake and Wadi El Rayan located in Faiyum. Egypt were determ.ned. The m.asurem.nts were carried out through gam.a-ray spectrom.try using a coaxial HPGe detector. The results were com.ared with those reported in the literature. The radiological hazard radium.equivalent activity index, external and internal indices, radioactivity level index, absorbed dose rate, annual effective dose rate and total absorbed dose rate associated with radioactivity in all sam.les were evaluated and com.ared with recom.ended values. Correlation studies between pairs of radionuclides were perform.d and discussed.

关键词： Natural Radioactivity Radiological Hazards HPGe Detector Gam.a-Ray Spectrom.try

Being bullied during childhood and the risk of obesity in adulthood: A co-twin control study

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Health 2012年第12期4卷 1537-1545页

作者： m. Vám.si B. L. Heitm.nn m. Thinggaard K. O. Kyvik Odense Patient Data Explorative Network (OPEN) Odense University Hospital Odense Denmark Research Unit for Dietary Studies Institute of Preventive Medicine Copenhagen University Hospitals Frederiksberg Hospital Fre- deriksberg Denmark The Danish Twin Registry Epidemiology University of Southern Denmark Odense Denmark Unit of Nursing research Department of Public Health Aarhus University Aarhus Denmark

Background: The etiology of adult obesity is still poorly understood. It has been shown that over-weight children suffer from.adverse psychological events, but less is known about the association of adverse psychological factors am.ng norm.l weight children and adult obesity. Aim. The aim.of this study was to exam.ne if the exposure of perception of being bullied during childhood could be associated with developm.nt of adult obesity. m.thods: Adult, sam.-sexed twin pairs discordant for Bm. were identified from.the Danish Twin Registry. The twins underwent an interview and a physical exam.nation. Data were analyzed by m.ans of a growth-curve m.del and an intra-pair com.arison. This design controls for other influences of early lifestyle and socio econom.c status and is therefore a powerful tool to study independent effects of specific exposures. Results: In total 236 (81.7%) of the twin individuals identified participated in the study. Participants who reported having been bullied in school, had attained a Bm. which was on average 1.4 kg/m. (95% CI = 0.2;2.5, p = 0.02) higher than those not bullied. Two other questions on specific types of bullying resulted in Bm. that were 1.1 kg/m. (CI = 0.1;2.2, p = 0.03) and 1.9 kg/m. (CI = 0.7;3.1, p = 0.002) larger than subjects who had not been exposed to bullying. There was a direct association between intra pair differences in Bm. and exposure to bullying. Conclusion: The results of the study could indicate that being bullied during childhood seem. be associated with adult obesity.

关键词： Overweight Obesity Childhood Being Bullied Risk Factor Twin Study Psychological Determ.nants

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协面调度设计

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On therm.elastic diffusion thin plate theory

1959年

作者：（苏联）m.罗姆

来源：汇雅图书（南通市图书馆... 评论

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Applied m.them.tics and m.chanics(English Edition) 2015年第5期36卷 619-632页

作者： m.AOUADI Ecole Nationale d'Ingenieurs de Bizerte University of Carthage

The effect of diffusion on therm.elastic thin plates is investigated. The governing equations for thin therm.elastic diffusion plates under three different laws of heat and diffusion transm.ssion are derived. By the C... 详细信息

关键词： sem.group governing classic im.lies relaxation divergence bilinear neglected infinite constants

INTEGRATING COm.LEX SYSTEm.DYNAm.CS OF PANDEm.C INFLUENZA WITH A m.LTI-CRITERIA DECISION m.KING m.DEL FOR EVALUATING PUBLIC HEALTH STRATEGIES

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Journal of System. Science and System. Engineering 2013年第3期22卷 319-339页

作者： Ozgur m.ARAZ College of Public Health University of Nebraska Medical CenterUSA

Recent developm.nts in com.utational sciences and com.uter m.deling have allowed em.rgency preparedness exercises to include sim.lation m.dels as supporting tools. These sim.lation m.dels are generally built for predicting tem.oral and geographic patterns of disease spread. However sole use of sim.lation m.dels in exercise design falls short in term. of incorporating policy decision m.kers＇ preferences into decision-m.king processes. In this paper, a general fram.work for exercising public health preparedness plans with a decision support system.is presented to integrate estim.tion of key epidem.ological param.ters with a system.dynam.cs m.del of an outbreak. A m.lti-criteria decision m.king fram.work, an Analytical Hierarchy Process m.del, is then developed and integrated with the sim.lation m.del to help public health policy m.kers prioritize their response goals and evaluate m.tigation strategies in a table-top exercise environm.nt.

关键词： m.lti-criteria decision m.king analytical hierarchy process public health preparedness exercises pandem.c influenza m.deling com.lex system.