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STM Manipulation of Molecular Moulds on Metal Surfaces

Nano Research 2009年第3期2卷 254-259页

作者： Miao Yu Wei Xu Youness Benjalal regis barattin Erik Lægsgaard Ivan Stensgaard Mohamed Hliwa Xavier Bouju AndréGourdon Christian Joachim Trolle R.Linderoth Flemming Besenbacher Interdisciplinary Nanoscience Center(iNANO)and Department of Physics and Astronomy Aarhus UniversityNy Munkegade8000 Aarhus CDenmark Nanoscience group CEMES-CNRS29 rue Jeanne Marvig31055 ToulouseFrance Facultédes Sciences Ben MʼSik UniversitéHassan II-MohammédiaBP 7955Sidi OthmanCasablancaMorocco

Molecular Landers are a class of compounds containing an aromatic board as well as bulky side groups which upon adsorption of the molecule on a surface may lift the molecular board away from the *** molecular Landers have extensively been studied as model systems for nanomachines and the formation of molecular wires,as well as for their function as“molecular moulds”,i.e.,acting as templates by accommodating metal atoms underneath their aromatic ***,we investigate the adsorption of a novel Lander molecule 1,4-bis(4-(2,4-diaminotriazine)phenyl)-2,3,5,6-tetrakis(4-tert-butylphenyl)benzene(DAT,C_(64)H_(68)N_(10))on Cu(110)and Au(111)surfaces under ultrahigh vacuum(UHV)*** means of scanning tunneling microscopy(STM)imaging and manipulation,we characterize the morphology and binding geometries of DAT molecules at terraces and step *** the Cu(110)surface,various contact configurations of individual DAT Landers were formed at the step edges in a controlled manner,steered by STM manipulation,including lateral translation,rotation,and pushing molecules to an upper *** diffusion barrier of single DAT molecules on Au(111)is considerably smaller than on Cu(110).The DAT Lander is specially designed with diamino-triazine side groups making it suitable for future studies of molecular self-assembly by hydrogen-bonding *** results presented here are an important guide to the choice of substrate for future studies using this compound.

关键词： Scanning tunneling microscopy(STM) molecular Landers adsorption STM manipulation molecular moulding

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Bi-objective mathematical model for choosing sugarcane varieties with harvest residual biomass in energy cogeneration

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International Journal of Agricultural and Biological Engineering 2012年第3期5卷 50-58页

作者： Francisco regis Abreu Gomes Coordination of Natural Resources Federal Institute of EducationScience and Technology of CearáRoad o f CedroQuixadáCEBrazil

Sugarcane crop occupies an area of about 23.78 million hectares in 103 countries,and an estimated production of 1.66 billion tons,adding to this volume more than 6%to 17%concerning residual biomass resulting from *** destination of this residual biomass is a major challenge to managers of *** are at least two alternatives which are reduction in residue production and increased output in electricity *** two conflicting objectives are mathematically modeled as a bi-objective *** study developed a bi-objective mathematical model for choosing sugarcane varieties that result in maximum revenue from electricity sales and minimum gathering cost of sugarcane harvesting residual *** approach used to solve the proposed model was based on theε-constraints *** were performed using real data from sugarcane varieties and costs and showed effectiveness of model and method *** experiments showed the possibility of increasing net revenue from electricity sale,i.e.,already discounted the cost increase with residual biomass gathering,in up to 98.44%.

关键词： sugarcane harvested residual biomass bi-objective mathematical programming ε-constraints method energy cogeneration

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Enzymatic and non-enzymatic antioxidant, anti-inflammatory and anticancer activities of Floscopa scandens Lour

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Journal of Traditional Chinese Medicine 2020年第3期40卷 473-483页

作者： Anto Suganya regis Jeya Jothi Gabriel Department of Plant Biology and Biotechnology Loyola CollegeNungambakkamChennai-600034Tamil NaduIndia

OBJECTIVE: To explore the total phenolic and flavonoid content, enzymatic, non-enzymatic antioxidant properties, anti-inflammation and anticancer activities of hexane, ethyl acetate and methanol extracts of Floscopa scandens(F. scandens).METHODS: Non-enzymatic antioxidant activity was examined by 2, 2-diphenyl-1-picrylhydrazyl assay, nitric oxide scavenging assay, hydroxyl radical scavenging assay, reducing power assay, hydrogen peroxide scavenging assay, superoxide scavenging assay and metal chelating assay. Enzymatic antioxidant ability was screened for the antioxidant enzymes such as ascorbate oxidase, peroxidase, catalase and polyphenol oxidase. The anti-inflammatory property was proved with the inhibition of protein denaturation and protease inhibitory assays. In vitro anticancer activity was assessed by cell viability ***: Methanol extract contained high amount of phenols(198.41 mg catechol equivalent/gram extract) and flavonoids(101.70 mg quercetin equivalent/gram extract) showed higher activity than hexane and ethyl acetate extracts in all experiments. Fresh plant showed considerable enzymatic antioxidant ***: The results revealed that the methanol extracts of F. scandens could be used as a potential source of antioxidant, anti-inflammatory and anticancer bioactive compounds.

关键词： Anti-inflammatory agents Antineoplastic agents Antioxidant Floscopa scandens

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Advantages of QWIP technology in infrared thermal cameras

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应用光学 2017年第2期38卷 298-303页

作者： Eric Belhaire regis Pichon Thales Optronique SAS 2 avenue Gay-Lussac Elaneourt 78995 France

Standard GaAs/AlGaAs quantum well infrared photodetectors(QWIP)have been seriously considered as atechnological choice for the 3^(rd) generation of thermal imagers in the long wave infrared band(LWIR)for some *** technology like MCT(HgCdTe)was the technology choice of the 2^(nd) generation because of its high quantum *** the paper,measurements on the QWIP technology will be presented and a comparison with alternative technology will be done.

关键词： infrared detectors image sensors quantum well infrared photodetectors(QWIP)

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Two upper bounds for the Erdos-Hooley Delta-function

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Science China Mathematics 2023年第12期66卷 2683-2692页

作者： regis de la Breteche Gerald Tenenbaum Institut de Mathematiques Universite Paris CiteSorbonne UniversiteCNRSParis F-75013France Institut Elie Cartan Universite de LorraineVandoeuvre-les-NancyBP 70239France

For integer n≥1 and real u,let Δ(n,u):=|{d:d] n,e^(u) 详细信息

For integer n≥1 and real u,let Δ(n,u):=|{d:d] n,e^(u)

关键词： concentration of divisors average order normal order Waring’s problem

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On a certain non-split cubic surface

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Science China Mathematics 2019年第12期62卷 2435-2446页

作者： regis de la Breteche Kevin Destagnol Jianya Liu Jie Wu Yongqiang Zhao Institut de Mathematiques de Jussieu Universite Paris-DiderotParis 75205France IST Austria Klosterneuburg 3400Austria School of Mathematics Shandong UniversityJinan 250100China Laboratoire d'Analyse et de Mathematiques Appliquees Univer site Paris-Est CreteilCNRSUMR 8050Creteil 94010France School of Science Westlake UniversityHangzhou 310024China

This paper establishes an asymptotic formula with a power-saving error term for the number of rational points of bounded height on the singular cubic surface of P3 Qgiven by the following equation x0（x12+ x22）-x33= ... 详细信息

关键词： Manin-Peyre conjecture rational points singular cubic surface non-split toric surface descent on torsors asymptotic formula

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Dislocation of primary total hip arthroplasty:Analysis of risk factors and preventive options

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World Journal of Orthopedics 2024年第6期15卷 501-511页

作者： Dario regis Mattia Cason Bruno Magnan Department of Orthopedic and Trauma Surgery Integrated University HospitalVerona 37126VenetoItaly

Total hip arthroplasty(THA)is one of the most successful elective operations in orthopedic surgery for improving pain and functional disability in patients with end-stage joint ***,dislocation continues to be a troublesome complication after THA,as it is a leading cause of revision and is associated with substantial social,health,and economic *** is a relatively rare,usually early occurrence that depends on both the patients’characteristics and the surgical *** most recent and important finding is the special attention to be given preoperatively to spinopelvic mobility,which is closely related to the incidence of ***,clinical and radiographic assessment of the lumbar spine is mandatory to identify an altered pelvic tilt that could suggest a different positioning of the *** spinal fusion is currently considered a risk factor for dislocation and revision regardless of whether it is performed prior to or after *** options for its treatment and prevention include the use of prostheses with large diameter of femoral head size,dual mobility constructs,constrained liners,and modular neck stems.

关键词： Dislocation Total hip arthroplasty Revision surgery Review Risk factors Complication

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Cell culture isolation can miss the laboratory diagnosis of HSV ocular infection

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International Journal of Ophthalmology(English edition) 2010年第2期3卷 164-167页

作者： regis P Kowalski Paul P Thompson Tara H Cronin The Charles T.Campbell Ophthalmic Microbiology Laboratory UPMC Eye CenterOphthalmology and Visual Sciences Research Centerthe Eye and Ear InstituteDepartment of OphthalmologyUniversity of Pittsburgh School of MedicinePittsburghPennsylvaniaUSA

AIMWe compared polymerase chain reaction (PCR) to cell culture isolation for the laboratory diagnosis of ocular herpes simplex virus (HSV) disease.

关键词： herpes simplex virus polymerase chain reaction cell culture isolation HSV keratitis

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Development of new ionic gelation strategy： Towards the preparation of new monodisperse and stable hyaluronic acid/ β-cyclodextrin-grafted chitosan nanoparticles as drug delivery carriers for doxorubicin

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Frontiers of Materials Science 2018年第1期12卷 83-94页

作者： Amina Ben MIHOUB Boubakeur SAIDAT Youssef BAL Celine FROCHOT regis VANDERESSE Samir ACHERAR Laboratoire de Chimie Physique Macromoleculaire (LCPM) Universite de Lorraine-CNRS UMR 7375 1 Rue Grandville BP 2045154001 Nancy Cedex France Laboratory of Physical Chemistry of Materials (LPCM) Faculty of Sciences (UATL) BP 37G Laghouat 03000 Algeria Laboratory of Biomaterials & Transport Phenomena (LBTP) Quartier Ain D'Heb 26000 Medea Algeria Department of Chemistry Faculty of Sciences University Saed Dahleb of Blida (USDB) route de Soumae 09000 Blida Algeria Laboratoire Reactions et Genie des Procedes (LRGP) Universite de Lorraine-CNRS UMR 7274 1 Rue Grandville BP 20451 54001 Nancy Cedex France

In the present study, β-cyclodextrin-grafted chitosan nanoparticles （β-CD- g-CS NPs） were prepared using a new ionic gelation strategy involving a synergistic effect of NaCI （150 mmol/L）, 4-（2-hydroxyethyl）-1-piperazineethanesulfonic acid （HEPES, 10 mmol/L）, and water bath sonication. This new strategy afforded smaller and more monodisperse β-CD-g-CS NPs vs. the classical ionic gelation method. New HA8β-CD-g-CS NPs were also prepared using the above-mentioned strategy by adding hyaluronic acid （HA） to the β-CD-g-CS copolymer at different weight ratios until the ZP values conversion. The best result was obtained with the weight ratio of w（HA）：w（β-CD-g-CS） = 2：1 and furnished new spherical and smooth HA/β-CD-g-CS NPs. Furthermore, the stability of β- CD-g-CS NPs and HA/β-CD-g-CS NPs at 4℃ in physiological medium （pH 7.4） was compared for 3 weeks period and showed that HA/β-CD-g-CS NPs were more stable all maintaining their monodispersity and high negative ZP values compared to β-CD-g-CS NPs. Finally, preliminary study of HA/β-CD-g-CS NPs as carrier for the controlled release of the anticancer drug doxorubicin was investigated. These new HA/β-CD-g-CS NPs can potentially be used as drug delivery and targeting systems for cancer treatment.

关键词： β-cyclodextrin-grafted chitosan hyaluronic acid ionic gelation drugdelivery physicochemical parameters control

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The dynamics of ant mosaics in tropical rainforests characterized using the Self-Organizing Map algorithm

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Insect Science 2016年第4期23卷 630-637页

作者： Alain Dejean Frederic Azemar regis Cereghino Maurice Leponce Bruno Corbara Jereme Orivel Arthur Compin CNRS Laboratoire Ecologie Fonctionnelle et Environnement (UMR-CNRS 5245) 31062 Toulouse Universite de Toulouse UPS INP Ecolab 118 route de Narbonne 31062 Toulouse E-cologie des Forets de Guyane Campus agronomique BP 316 97387 Kourou cedex France Biodiversity Monitoring and Assessment Unit Royal Belgian Institute of Natural Sciences Rue Vautier 29 B-1000 Brussels Belgium CNRS Laboratoire Microorganismes Genome et Environnement (UMR-CNRS 6023) Universite Blaise Pascal Complexe Scientifique des Cezeaux 63177 Aubiere cedex Clermont Universite Universite Blaise Pascal LMGE BP 10448 F-63000 Clermont-Ferrand France

Ants, the most abundant taxa among canopy-dwelling animals in tropical rainforests, are mostly represented by territorially dominant arboreal ants （TDAs） whose territories are distributed in a mosaic pattern （arboreal ant mosaics）. Large TDA colonies regulate insect herbivores, with implications for forestry and agronomy. What generates these mosaics in vegetal formations, which are dynamic, still needs to be better understood. So, from empirical research based on 3 Cameroonian tree species （Lophira alata, Ochnaceae; Anthocleista vogelii, Gentianaceae; and Barteriafistulosa, Passifloraceae）, we used the Self-Organizing Map （SOM, neural network） to illustrate the succession of TDAs as their host trees grow and age. The SOM separated the trees by species and by size for L. alata, which can reach 60 m in height and live several centuries. An ontogenic succession of TDAs from sapling to mature trees is shown, and some ecological traits are highlighted for certain TDAs. Also, because the SOM permits the analysis of data with many zeroes with no effect of outliers on the overall scatterplot distributions, we obtained ecological information on rare species. Finally, the SOM permitted us to show that functional groups cannot be selected at the genus level as congeneric species can have very different ecological niches, something particularly true for Crematogaster spp., which include a species specifically associated with B. fistulosa, nondominant species and TDAs. Therefore, the SOM permitted the complex relationships between TDAs and their growing host trees to be analyzed, while also providing new information on the ecological traits of the ant species involved.

关键词： ant plant relationships dynamics of associations myrmecophytes tropicalrainforests

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