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Effect of inductively coupled plasma surface treatment on silica gel and mesoporous MCM-41 particles

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Plasma Science and Technology 2018年第6期20卷 104-113页

作者： j A juAREZ-MORENO u CHACON-ARgAEZ j BARRON-ZAMBRANO C CARRERA-FIguEIRAS P QuINTANA-OWEN W TALAVERA-PECH Y PEREZ-PADILLA A AVILA-ORTEgA facultad de ingeniería química-uady periférico norte kilómetro 33.5col.chuburna de hidalgo inn C.P. 97203 Mérida Yucatan México centro de investigación y de estudios avanzados del ipn-unidad mérida km.6 antigua carretera a progreso apdo. Postal 73 Cordemex 97310 Méfida Yucatán México

Silica gel and MCM-41 synthesized mesoporous materials were treated with either oxygen（O_2）,hexamethyldisiloxane（HMDSO） and organic vapors like ethanol（Et OH）,and acrylonitrile（AN）inductive *** radiofrequency power for the modification was fixed to 120 W and30 min,assuring a high degree of organic ionization energy in the *** surface properties were studied by infrared spectroscopy（FTIR）,scanning electron microscopy,x-ray photoelectron spectroscopy and dynamic light scattering technique was used for characterizing size *** the silica and MCM-41 particles were modified by AN and HMDSO plasma gases,the surface morphology of the particles was changed,presenting another color,size or *** contrast,the treatments of oxygen and Et OH did not affect the surface morphology of both particles,but increased the oxygen content at the surface bigger than the AN and HMDSO plasma *** this study,we investigated the influence of different plasma treatments on changes in morphology and the chemical composition of the modified particles which render them a possible new adsorbent for utilization in sorptive extraction techniques for polar compounds.

关键词： silica MCM-41 nanoparticles plasma treatment

Orthogonal assays for the identification of inhibitors of the single-stranded nucleic acid binding protein YB-1

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Acta Pharmaceutica Sinica B 2019年第5期9卷 997-1007页

作者： Alexander j.Trevarton Yan Zhou Dehua Yang gordon W.Rewcastle jack u.Flanagan Antony Braithwaite Peter R.Shepherd Cristin g.Print Ming-Wei Wang Annette Lasham Department of Molecular Medicine and Pathology University of AucklandAucklandNew Zealand The National Center for Drug Screening and the CAS Key Laboratory of Receptor Research Shanghai Institute of Materia MedicaChinese Academy of Sciences(CAS)Shanghai201203China Auckland Cancer Society Research Centre AucklandNew Zealand Maurice Wilkins Centre for Molecular Biodiscovery University of AucklandAucklandNew Zealand Department of Pathology Dunedin School of MedicineUniversity of OtagoDunedinNew Zealand Maurice Wilkins Centre for Molecular Biodiscovery University of OtagoDunedinNew Zealand School of Pharmacy Fudan UniversityShanghai201203China

We have previously shown that high expression of the nucleic acid binding factor YB-1 is strongly associated with poor prognosis in a variety of cancer types. The 3-dimensional protein structure of YB-1 has yet to be determined and its role in transcriptional regulation remains elusive. Drug targeting of transcription factors is often thought to be difficult and there are very few published high-throughput screening approaches. YB-1 predominantly binds to single-stranded nucleic acids, adding further difficulty to drug discovery. Therefore, we have developed two novel screening assays to detect compounds that interfere with the transcriptional activation properties of YB-1, both of which may be generalizable to screen for inhibitors of other nucleic acid binding molecules. The first approach is a cell-based luciferase reporter gene assay that measures the level of activation of a fragment of the E2 F1 promoter by YB-1. The second approach is a novel application of the Alpha Screen system, to detect interference of YB-1 interaction with a single-stranded DNA binding site. These complementary assays examine YB-1 binding to two discrete nucleic acid sequences using two different luminescent signal outputs and were employed sequentially to screen 7360 small molecule compounds leading to the identification of three putative YB-1 inhibitors.

关键词： Cancer YB-1 Luciferase Alpha Screen Transcription factor Single-stranded DNA

Physics-based,data-driven approach for predicting natural ventilation of residential high-rise buildings

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Building Simulation 2022年第1期15卷 129-148页

作者： Vincent j.L.gan Boyu Wang C.M.Chan A.u.Weerasuriya jack C.P.Cheng Department of Building School of Design and EnvironmentNational University of SingaporeSingapore117566 Department of Civil and Environmental Engineering The Hong Kong University of Science and TechnologyHong Kong999077China

Natural ventilation is particularly important for residential high-rise buildings as it maintains indoor human comfort without incurring the energy demands that air-conditioning *** improve a building’s natural ventilation,it is essential to develop models to understand the relationship between wind flow characteristics and the building's *** more effort is still needed for developing such reliable,accurate,and computationally economical models instead of currently the most popular physics-based models such as computational fluid dynamics(CFD)*** paper,therefore,presents a novel model developed based on physics-based modelling and a data-driven approach to evaluate natural ventilation in residential high-rise *** model first uses CFD to simulate wind pressures on the exterior surfaces of a high-rise *** the surface pressures have been obtained,multizone modelling is used to predict the air change per hour(ACH)for different flats in various ***-driven prediction models are then developed using data from the simulation and deep neural networks that are based on mean absolute error,mean absolute percentage error,and a fusion algorithm *** data-driven models are used to predict the ACH of 25 *** results from multizone modelling and data-driven modelling are *** results imply a high accuracy of the data-driven prediction in comparison with physics-based *** fusion algorithm-based neural network performs best,achieving 96%accuracy,which is the highest of all models *** study contributes a more efficient and robust method for predicting wind-induced natural *** findings describe the relationship between building design(e.g.,plan layout),distribution of surface pressure,and the resulting ACH,which serve to improve the practical design of sustainable buildings.

关键词： computational fluid dynamics data-driven prediction machine learning multizone model natural ventilation residential building

Development and characterization of a microfluidic glucose sensing system based on an enzymatic microreactor and chemiluminescence detection

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Science China Chemistry 2012年第4期55卷 515-523页

作者： MOON B.-u. de VRIES M.g. WESTERINK B.H.C. VERPOORTE E. Biomonitoring and Sensoring Department of Pharmacy University of Groningen Antonius Deusinglaan 1 9713AV Groningen The Netherlands Pharmaceutical Analysis Department of Pharmacy University of Groningen Antonius Deusinglaan 1 9713AV Groningen The Netherlands Brains-on-Line PO Box 4030 9713AV Groningen The Netherlands

Chemiluminescence detection was developed as an alternative to amperometric detection for glucose analysis in a portable, microfluidicsbased continuous glucose monitoring system. Amperometric detection allows easy determination of hydrogen peroxide, a product of the glucose oxidasecatalyzed reaction of glucose with oxygen, by oxidation at a microelectrode. However, （micro）electrodes in direct contact with physiological sample are subject to electrode fouling, which leads to signal drift, decreased reproducibility and shortened detector lifetimes. Moreover, there are a few species present in the body （e.g. ascorbic acid, uric acid） which can undergo oxidation at the same applied potential as hydrogen peroxide. These species can thus inter- fere with the glucose measurement, reducing detection specificity. The rationale for exploring chemiluminescence as opposed to amperometric detection is thus to attempt to improve the lifetime and reproducibility of glucose analysis for monitoring purposes, while reducing interference caused by other chemicals in the body. The study reported here represents a first step in this direction, namely the realization of a microfluidic device with integrated silicon photodiode for chemiluminescence detection of glucose. This microflow device uses a chaotic mixing approach to perform enzymatic conversion of glucose, followed by reaction of the hydrogen peroxide produced with luminol to produce light at 425 nm. The chemil reaction is catalyzed by horseradish peroxidase in the presence of iodophenol. The performance of the fabricated chip was characterized to establish optimal reaction conditions with respect to sample and reagent flow rates, pH, and concentrations. A linear calibra- tion curve was obtained for current response as a function of glucose concentration in the clinically relevant range between 2 and 10 mM, with a sensitivity of 39 pA/mM （R = 0.9963, one device, n = 3） and a limit of detection of 230 ktM （S/N - 3）.

关键词： microfluidic chip – glucose sensing system – enzymatic microreactor – chemiluminescence – chaotic mixing

ITMA 2011:来自狭幅织机和经编针织机械工业的新闻

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国际纺织导报 2012年第12期40卷 34-36页

作者： u.Mhring 吴丽霞图林根州弗格兰纺织研究所

2011年9月22—29日西班牙巴塞罗那国际纺织机械展上,来自45个国家的1350个参展商分别在8个展厅展示了他们的机器。作为纺织行业的领头展会,2011年国际纺织机械展吸引了很多持有关于纺织产业的最新发展及技术革新方面信息的国际客人前来... 详细信息

2011年9月22—29日西班牙巴塞罗那国际纺织机械展上,来自45个国家的1350个参展商分别在8个展厅展示了他们的机器。作为纺织行业的领头展会,2011年国际纺织机械展吸引了很多持有关于纺织产业的最新发展及技术革新方面信息的国际客人前来参观。以下将对高性能狭幅织机及针织经编机械工业的革新进行概括。

关键词：狭幅织机经编针织机械

Spark plasma sintering of a high-energy ball milled Mg-10 wt% Al alloy

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journal of Magnesium and Alloys 2020年第2期8卷 319-328页

作者： M.u.F.Khan A.Patil j.Christudasjustus T.Borkar R.K.gupta Department of Chemical Biomolecularand Corrosion EngineeringThe University of AkronAkronOH 44325United States Department of Mechanical Engineering Washkevicz College of EngineeringCleveland State UniversityClevelandOH 44115United States

The influence of spark plasma sintering(SPS)temperature on microstructure,hardness and corrosion behavior of a high-energy ball milled Mg-10wt%Al alloy was investigated in this *** holding time and sintering pressure for SPS were kept constant while varying the sintering temperature from 200 to 350℃.The grain size and microstructure were studied using X-ray diffraction analysis,scanning electron microscopy,energy dispersive X-ray spectroscopy,and Archimedes'based density *** behavior was investigated using potentiodynamic polarization *** nanocrystalline regime(grain sizeup to 350℃.The density of the alloy increased with increasing the SPS ***'hardness and corrosion performance improved up to 300℃ followed by a decrease after SPS at 350℃.Possible reasons for densification,strengthening,and corrosion behavior have been discussed in the light of reduced porosity and microstructural changes.

关键词： Nanocrystalline alloy Magnesium High energy ball milling Spark plasma sintering Corrosion

Bio-Fertilizer,ground Magnesium Limestone and Basalt Applications May Improve Chemical Properties of Malaysian Acid Sulfate Soils and Rice growth

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Pedosphere 2014年第6期24卷 827-835页

作者： Q.A.PANHWAR u.A.NAHER O.RADZIAH j.SHAMSHuDDIN I.MOHD RAZI Department of Land Management Faculty of AgricultureUniversity Putra MalaysiaSerdang 43400 (Malaysia) Institute of Tropical Agriculture University Putra MalaysiaSerdang 43400 (Malaysia) Soil Science Division Bangladesh Rice Research InstituteGazipur 1701 (Bangladesh)

Acid sulfate soils are normally not suitable for crop production unless they are appropriately ameliorated. An experiment was conducted in a glasshouse to enhance the growth of rice, variety MR219, planted on an acid sulfate soil using various soil *** soil was collected from Semerak, Kelantan, Malaysia. ground magnesium limestone(gML), bio-fertilizer, and basalt(each 4t ha-1) were added either alone or in combinations into the soil in pots 15 d before transplanting. Nitrogen, P and potash were applied at 150, 30, and 60 kg ha-1, respectively. Three seven-day-old rice seedlings were transplanted into each pot. The soil had a p H of 3.8 and contained organic C of 21 g kg-1, N of 1.2 g kg-1, available P of 192 mg kg-1, exchangeable K of 0.05 cmol c kg-1,and exchangeable Al of 4.30 cmol c kg-1, with low amounts of exchangeable Ca and Mg(0.60 and 0.70 cmol c kg-1). Bio-fertilizer treatment in combination with gML resulted in the highest p H of 5.4. The presence of high Al or Fe concentrations in the control soil without amendment severely affected the growth of rice. At 60 d of growth, higher plant heights, tiller numbers and leaf chlorophyll contents were obtained when the bio-fertilizer was applied individually or in combination with gML compared to the control. The presence of beneficial bacteria in bio-fertilizer might produce phytohormones and organic acids that could enhance plant growth and subsequently increase nutrient uptake by rice. Hence, it can be concluded that addition of bio-fertilizer and gML improved rice growth by increasing soil p H which consequently eliminated Al and/or Fe toxicity prevalent in the acid sulfate soil.

关键词： Al toxicity amendments beneficial bacteria Fe toxicity indoleacetic acid organic acids

Strategies for baryon resonance analysis

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Chinese Physics C 2009年第12期33卷 1127-1131页

作者： M. Dring C. Hanhart 黄飞 S. Krewald u.-g. Meiβner Institut fr Kernphysik and jlich Center for Hadron Physics Forschungszentrum Jlich D-52425 Jlich Germany Institute for Advanced Simulation Forschungszentrum Jlich D-52425 Jlich Germany Department of Physics and Astronomy University of Georgia Athens Georgia 30602 USA Helmholtz-Institut fr Strahlen-und Kernphysik (Theorie) and Bethe Center for Theoretical Physics Universitt Bonn Nuβallee 14-16 D-53115 Bonn Germany

The analytic properties theoretical investigations of baryon of scattering amplitudes provide a meeting point for experimental and resonances. Pole positions and residues allow for a parameterization of resonances in a well-defined way which relates different reactions. The recent progress made within the jiilich model is summarized.

关键词： pion-nucleon scattering meson exchange model analytic structure of the scattering amplitude

EFFECTS OF MODIFICATION OF THE CARBIDE CHARACTERISTICS THROugH gRAIN BOuNDARY SERRATION ON CREEP-FATIguE LIFE IN AuSTENITIC STAINLESS STEELS

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Acta Metallurgica Sinica(English Letters) 2004年第5期17卷 632-638页

作者： K.j.Kim H.u.Hong K.S.Min S.W.Nam Dept. of Materials Science and Engineering Korea Advanced Institute of Science and Technology 373-1 Guseong-dong Yuseong-gu Deajeon 305-701 KoreaPosco Technical Research Laboratory #1 Koedong-dong Nam-gu Pohang 790-300 KoreaProcess Solution Development Team 1 LCD R&D Center AMLCD Division Device Solution Network Samsung Electronics Co. LTD.San 24 Nongseo-ri Giheung-eup Yongin Gyeonggi-do 449-771 KoreaDept. of Materials Science and Engineering Korea Advanced Institute of Science and Technology 373-1 Guseong-dong Yuseong-gu Deajeon 305-701 Korea

Modification of the carbide characteristics through the grain boundary serration is investigated, using an AISI 316 and 304 stainless steels. In both steels, triangular carbides were observed at straight grain boundaries while planar carbides were observed at the serrated grain boundaries. The serrated grain boundary energy is observed to be much lower than that of the straight one. Therefore, the carbide morphology is found to be changed from triangular to planar along the serrated boundary to reduce the interfacial energy between the carbide and the matrix. The creep-fatigue properties of these steels at 873K have been investigated. The creep-fatigue life of the sample with planar carbide at the serrated grain boundary was found to be much longer than that with triangular carbide at the straight one. These results imply that the planar carbides with lower interfacial energy have higher cavitation resistance, resulting in the retardation of cavity nucleation and growth to increase creep-fatigue life.

关键词： cavity nucleation factor grain boundary serration carbide morphology austenitic stainless steel grain boundary cavitation