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Switchable hydrophobic-hydrophilic layer obtained onto porous alumina by plasma-enhanced fluorination

Science China(Technological Sciences) 2009年第1期52卷 104-110页

作者： A. TRESSAUD C. LABRUGèRE E. DURAND C. BRIGOULEIX H. ANdrIESSEN Institute of Condensed Matter Chemistry of Bordeaux (ICMCB-CNRS) University Bordeaux 1 87 Avenue du Dr. A. Schweitzer AGFA GEVAERT NV Septestraat 27

Conventional lithographic printing processes using porous alumina for offset applications generally use "wet" routes. Recently "dry" processes have been developed which are based on a heat-induced hydrophilic/oleophilic conversion of one or more layers of the coating so that a stronger affinity to-wards ink or water fountain is created at the exposed areas with respect to the surface of the unex-posed coating. Treatments involving rf plasma-enhanced fluorination (PEF) constitute exceptional tools for modifying the surface properties of materials. Many advantages of these techniques can be indeed outlined, when compared to more conventional methods: room-temperature reactions, chemical modi-fications limited to surface only without changing the bulk properties, possible non-equilibrium reac-tions. The influence of PEF treatments on porous alumina layer used in printing plates has been tested with various fluorinated gases (CF4, C3F8 and C4F8) and characterized by XPS. The hydrophobic prop-erties of the fluorinated layer have been deduced from contact angle measurements. Using C4F8 rf-PEF treatment, the outmost surface of the hydrophilic alumina substrate used for lithographic printing is hydrophobized, or in other words, the hydrophilic substrate is converted into a support with hydro-phobic properties. Once being hydrophobized, the surface layer may be rendered hydrophilic using a heat pulse, thus giving rise to switchable hydrophobic-hydrophilic properties of the material.

关键词： porous alumina rf-plasma fluorination offset applications hydrophobic-hydrophilic switchable layer XPS contact angle

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细菌性阴道病临床诊断标准的评估

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世界核心医学期刊文摘（妇产科学分册） 2005年第8期1卷 58-58页

作者： Gutman R.E. Peipert J.F. Weitzen S. Blume J. 张瑞 dr.4940 eastern avenue Baltimore MD 21224-2780 United States

OBJECTIVE:To determine whether the current clinical criteria for diagnosing bacterial vaginosis can be simplified by using 2 clinical criteria rather than the standard 3 of 4 criteria (Amsels criteria). METHODS: This was a prospective observational study of 269 women undergoing a vaginal examination in the Womens Primary Care Center, Division of Research, or Colposcopy Clinic at Women &Infants Hospital. All 4 clinical criteria for diagnosing bacterial vaginosis were collected, and Gram stain was used as the gold standard. Sensitivity and specificity were calculated for each individual criterion, combinations of criteria, and a colorimetric pH and amine card. Receiver operating characteristic curve was generated to estimate the preferred pH and percentage of clue cells for diagnosing bacterial vaginosis. RESULTS: The prevalence of bacterial vaginosis in our study population was 38.7%. Vaginal pH was the most sensitive of all the criteria, at 89%, and a positive amine odor was the individual criteria with the highest specificity, at 93%. Similar specificity was seen with combinations of 2 criteria and Amsels criteria. Receiver operating characteristic curve analysis yielded a preferred pH and percentage of clue cells of 5.0 and 20%, respectively. However, a pH of 4.5 or greater improves sensitivity with minimal loss of specificity. CONCLUSION: The clinical criteria for diagnosing bacterial vaginosis can be simplified to 2 clinical criteria without loss of sensitivity and specificity.

关键词：细菌性阴道病临床诊断线索细胞细菌性阴道炎革兰染色妇幼医院阴道检查初级保健研究人群阴道镜

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Impact of surface roughness,surface charge,and temperature on sandstone wettability alteration by nanoparticles

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Petroleum Science 2023年第5期20卷 2852-2863页

作者： Bingjun Zhang Kaustubh Rane Mohammad Piri Lamia Goual Lam Research Corporation 11361 SW Leveton Dr.TualatinOR97062USA Champion X Chemical Technologies 11177 S.Stadium Dr.SugarlandTX77478USA Center of Innovation for Flow through Porous Media Dept.4311University of Wyoming1000 E.University AvenueLaramieWY82071USA Department of Energy and Petroleum Engineering Dept.3295University of Wyoming1000 E.University AvenueLaramieWY82071USA

The wettability of rocks affects the balance between capillary and viscous forces during multiphase flow through porous media,which in turn determines the fluid displacement process governing the recovery of oil from subsurface *** this work,the mechanism of wettability reversal of aged synthetic sandstones by metal oxide nanoparticles(SiO_(2) and Al_(2)O_(3))was investigated with particular focus on the impact of surface roughness,zeta potential,and *** synthetic surfaces were prepared from powders of Berea sandstone with known grain size ranges and their average roughness and roughness ratio were obtained from the 3D surface reconstruction of their microscope *** surface was subsequently aged in Permian crude oil to alter its *** surfaces with larger grain sizes and lower surface roughness ratios,the lower capillary pressure allowed stronger oil/surface interactions,leading to enhanced *** wettability alteration effects of nanoparticles were then examined through real-time top view imaging and dynamic front view contact angle *** negatively charged SiO_(2) nanoparticles rapidly reversed the sandstone wettability,indicating their potential applicability as wettability alteration *** contrast,the positively charged Al_(2)O_(3) counterpart caused no wettability *** mechanism of wettability alteration was further studied by microscale interaction analyses and nanoscale transmission electron *** nanoparticles were only a few nanometers large,the microscale roughness had a negligible effect on the wettability ***,the combined effect of van der Waals dispersion forces and surface-charge-induced electrostatic forces were recognized as the two key factors affecting the wettability of sandstone *** interactions may be curbed at elevated temperatures due to a decrease in the zeta potential and colloidal stability of the particles.

关键词： Wettability Sandstone Surface roughness Nanoparticle Microscope Enhanced oil recovery Contact angle Zeta potential

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Rab-Alc GTPase Defines a Population of the Trans-Golgi Network that Is Sensitive to Endosidinl during Cytokinesis in Arabidopsis

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Molecular Plant 2013年第3期6卷 847-859页

作者： Xingyun Qi Huanquan Zheng Department of Biology McGill University 1205 Dr Penfield Avenue Montreal Quebec H3A 1B1 Canada

In plant cells, Rab-A proteins have been implicated to play important roles in membrane trafficking from the trans-Golgi network （TGN） to the plasma membrane/cell wall and to the newly formed cell plate in cytokinesis. But how different Rab-A proteins may work in the TGN is not well studied. We show here that RAB-Alc defines a population of TGN that is partially overlapped with the VHA-al marked-TGN. Interestingly, the morphology of RAB-Alc defined- TGN is sensitive to endosidin 1 （ES1）, but not to wortmannin. In mitotic cells, RAB-Alc is relocated to the cell plate. We revealed that this process could be interrupted by ES1, but not by wortmannin. In addition, root growth and cytokinesis in root mitotic cells of rab-ala/b/c triple mutant seedlings are hypersensitive to lower concentrations of ES1. ES1 is known to selectively block the transport of several plasma membrane auxin transporters, including PIN2 and AUX1 at the TGN. Together with the known facts that members of Rab-A1 proteins are involved in auxin-mediated responses in root growth and that mutations in TRAPPII, a protein complex that acts upstream of RAB-Alc, also selectively impair the transport of PIN2 and AUX1 at the TGN, we propose that the Rab-Al-mediated trafficking pathways around the TGN, but not Rab-Als directly, are the target of ES1.

关键词： Rab-A TGN ES1 cytokinesis.

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Afterword to varicocele and male infertility： curreni concepts and future perspectives

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Asian Journal of Andrology 2016年第2期18卷 319-322页

作者： Sandro C Esteves Ashok Agarwal ANdrOFERT Center for Male Reproduction Av.Dr. Heitor Penteado 1464 Campinas SP 13075-460Brazil American Center for Reproductive Medicine Cleveland Clinic 10681 Carnegie Avenue X-11Cleveland OH 44195 USA.

We summarize and comment on the topics discussed by the contributors to this Special Issue of Asian Journal of Andrology. The scope of varicocele covers a wide spectrum, including proteomics and metabolomics, hormonal control, interventional therapy, and assisted reproductive technology （ART）. The selection of topics demonstrates the exciting breadth of this thematic area and the opportunity research holds for both increasing the understanding and improving the reproductive health of males with varicocele.

关键词： @@

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SYSTEMS ENGINEERING RESEARCH

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Journal of Systems Science and Systems Engineering 2008年第3期17卷 319-333页

作者： Abd-El-Kader SAHRAOUI Dennis M.BUEDE Andrew P.SAGE LAAS-CNRS and Universitéde Toulouse 7 Avenue du Colonel Roche Toulouse31077France Innovative Decisions Inc.2139 Golf Course Dr.RestonVA 20191 USA Dept.of Systems Engineering and Operations Research George Mason UniversityFairfaxVA 22030 USA

In this paper, we propose selected research topics that are believed central to progress and growth in the application of systems engineering （SE）. As a professional activity, and as an intellectual activity, systems engineering has strong links to such associated disciplines as decision analysis, operation research, project management, quality management, and systems design. When focussing on systems engineering research, we should distinguish between subjects that are of systems engineering essence and others that more closely correspond to those that are more relevant for related disciplines.

关键词： Systems engineering systems of systems requirements engineering systems families

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Design of a Bio-inspired Hull Shape for an AUV from Hydrodynamic Stability Point of View through Experiment and Numerical Analysis

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Journal of Bionic Engineering 2018年第6期15卷 950-959页

作者： Amir Honaryar Mahmoud Ghiasi Faculty of Marine Technology Amirkabir University of Technology Hafez Avenue 15875-4413 Tehran Iran

The hydrodynamic characteristics and body shape of catfish, Hypostomus, are used to design and develop an Autonomous Under- water Vehicle （AUV） named ZRAUV for subsea pipeline and cable inspection. Among the hydrodynamic characteristics, stability of this bio-inspired AUV, which may be adversely affected by disturbances such as marine currents during inspection process, is taken into consideration and evaluated both numerically and experimentally. Concerning numerical investigation, computational fluid dynamics based on Reynolds Averaged Navier-Stokes equations are applied to compute the hydrodynamic damping derivatives needed for stability analysis. In order to verify the numerical predictions, computations are also performed for the well-known submarine body with a typical axisymmetric hull shape, SUBOFF. Experiments are also carried out for both proposed AUV and a conventional axisymmetric one using self-propulsion tests. Measurements of turning rate in turning circle maneuver are in reasonably good agreement with those of numerical estimations and indicate that the turning rate of conventional bodies like SUBOFF is approximately 3.8 times as great as that of bio-inspired AUV. In other words, the findings reveal that in comparison with common axisymmetric bodies, the proposed AUV with biological hull shape is more stable by about 99%, thus, it is highly suitable for subsea pipeline and cable inspection.

关键词： catfish hydrodynamic stability bio-inspired AUV hull form computational fluid dynamics

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Varicocele and male infertility： current concepts and Future perspectives

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Asian Journal of Andrology 2016年第2期18卷 161-162,J0002页

作者： Ashok Agarwal Sandro C Esteves American Center for Reproductive Medicine Cleveland Clinic 10681 Carnegie Avenue X-11Cleveland OH 44195 USA ANdrOFERT Centerfor Male Reproduction Av. Dr. Heitor Penteado 1464Camp nas SP 13075-460 Braz.

This Special Issue of Asian Journal of Andrology is fully dedicated to the thematic area of Varicocele, which has been one of the most controversial issues in the field of Urology, Andrology, and Reproductive Medicine. Recognized as a dinical entity for over a century, varicocele from Latin： varix （dilated vein） and from Greek： kele （tumor） still elicits heated debate among scientists and clinicians on an arguable negative effect on male fertility and gonadal function and has fueled thousands of scholarly articles since its first report in the 18^th century.

关键词： Varicocele male infertility

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Table-top optical parametric chirped pulse amplifiers: past and present

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Opto-Electronic Advances 2023年第3期6卷 57-83页

作者： Audrius Dubietis Aidas Matijošius Laser Research Center Vilnius UniversitySaulėtekio Avenue 10LT-10223 VilniusLithuania

The generation of power-and wavelength-scalable few optical cycle pulses remains one of the major challenges in modern laser *** the past decade,the development of table-top optical parametric chirped pulse amplificationbased systems was progressing at amazing speed,demonstrating excellent performance characteristics in terms of pulse duration,energy,peak power and repetition rate,which place them at the front line of modern ultrafast laser *** present,table-top optical parametric chirped pulse amplifiers comprise a unique class of ultrafast light sources,which currently amplify octave-spanning spectra and produce carrier-envelope phase-stable,few optical cycle pulses with multi-gigawatt to multi-terawatt peak powers and multi-watt average powers,with carrier wavelengths spanning a considerable range of the optical *** article gives an overview on the state of the art of table-top optical parametric chirped pulse amplifiers,addressing their relevant scientific and technological aspects,and provides a short outlook of practical applications in the growing field of ultrafast science.

关键词： optical parametric amplification post-compression ultrafast nonlinear optics high harmonic generation

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Spectroscopic studies and Rietveld refinement of strontium-britholites

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Journal of Rare Earths 2008年第4期26卷 483-489页

作者： Khaled Boughzala Ezzedine Ben Salem Fethi Kooli Pierre Gravereau Khaled Bouzouita U. R. Matériaux Inorganiques Institut Préparatoire aux Etudes d'Ingénieurs Rue Ibn ElJazzr 5019 Monastir Tunisia Department of Chemistry Taibah University P.O.Box 30002. Almadinah Almunawwarah Saudi Arabia 87 Avenue du Dr Schweitzer 33608 Pessac Cedex France

Strontium-britholites whose chemical formula was Sr10-xLax（PO4）6-x（SiO4）xF2, where x=0, 1, 2, and 4 were prepared by solid state reaction. The structural refinement carried out using the Rietveld method indicated that La^3＋ ions were located into the two sites with a strong preference for metal （2） sites especially for low contents. A progressive shift of the F position along the c-axis outside the centre of the triangle formed by metal （2）-atoms was observed with the increase of x. The infrared and Raman spectra exhibited the characteristic vibration modes of PO4 and SiO4groups confirming the incorporation of this last group into the apatite structure. The 295i MAS-NMR spectra exhibited one resonance peak confirming the data obtained by X-ray diffraction, indicating that P and Si were located in the same crystallographic site.

关键词： strontium brithofites Rietveld refinement infrared spectroscopy nuclear magnetic resonance (NMR) Raman spectroscopy rare earths

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