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SUSY searches at ATLAS

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Frontiers of physics 2013年第3期8卷 248-256页

作者： pascal Pralavoriot CPPM University Aix-Marseille and CNRS/IN2P3 Marseille France

Despite the absence of experimental evidence, weak scale supersymmetry remains one of the best motivated and studied Standard Model extensions. The ATLAS experiment at the LHC searches for signs of supersymmetry in a large variety of signatures involving events with abnormal production of missing transverse momentum, jets, leptons, third generation fermions, gauge bosons or massive long-lived particles. A summary of the most recent results obtained in these searches is presented.

关键词： supersymmetry (SUSY) ATLAS LHC

Lagrangian Submanifolds Foliated by(n-1)-spheres in R^(2n)

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Acta Mathematica Sinica,English Series 2006年第4期22卷 1197-1214页

作者： Henri ANCIAUX Ildefonso CASTRO pascal ROMON PUC-RioDepartamento de Matemática Rua Marques de Sao Vicente225-GáveaRio de Janeiro-Brazil-CEP 22453-900 Departamento de Matemáticas Universidad de Jaén23071 JaénSpain Université de Marne-la-Vallée 5 bd DescartesChamps-sur-Marne77454 Marne-la- Vallée cedex 2France

We study Lagrangian submanifolds foliated by （n - 1）-spheres in R^2n for n ≥ 3. We give a general parametrization for such submanifolds, and refine that description when the submanifold is special Lagrangian, self-similar, Hamiltonian stationary or has mean curvature vector of constant length. In all these cases, the submanifold is centered, i.e. invariant under the action of SO（n）. It suffices then to solve a simple ODE in two variables to describe the geometry of the solutions.

关键词： Lagrangian submanifold special Lagrangian self-similar Hamiltonian stationary

Study on the Immobilization of Laccase and Its Application to the Removal of Dyes from Industrial Effluents

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Study on the Immobilization of Laccase and Its Application t...

作者： Habimana pascal 河北工业大学

学位级别：硕士

在工业应用中大量使用染料产生的废水,对人类健康和水环境造成了严重的影响。漆酶作为一种绿色生物催化剂,可对工业废水中的染料/有毒化学物质进行降解。然而漆酶的分子结构很容易受到外界环境的影响,而且游离的漆酶不可重复用、稳定性... 详细信息

在工业应用中大量使用染料产生的废水,对人类健康和水环境造成了严重的影响。漆酶作为一种绿色生物催化剂,可对工业废水中的染料/有毒化学物质进行降解。然而漆酶的分子结构很容易受到外界环境的影响,而且游离的漆酶不可重复用、稳定性差、成本高、难分离。为了解决这些问题,选用合适的载体对酶分子进行固定化是有效的策略之一。磁性核壳介孔氧化硅和金属有机骨架材料具有孔径可调、毒性低、化学稳定性高、比表面积大等优势,是固定化酶的理想载体。本研究以磁性介孔氧化硅纳米花(SiO@FeOnanoflowers)、介孔氧化硅包覆的磁性多壁碳纳米管(FeO-MWCNTs@SiO)和ZIF-8包覆的多壁碳纳米管(ZIF-8@MWCNTs)为载体,分别采用共价结合法和吸附法固定漆酶。考察了固定化漆酶的制备条件、稳定性及催化性能,并与游离漆酶进行了比较。最后,研究了固定化酶和游离漆酶对偶氮染料的脱色效果。本研究主要包括以下三个方面:(1)以十六烷基三甲基溴化胺(CTAB)为模板剂,FeO为磁核,正硅酸乙酯(TEOS)为硅源,合成了SiO@FeO磁性介孔氧化硅纳米花。在550 C下煅烧5 h去除模板剂。所得了SiO@FeO的比表面积、孔体积和孔径分别为518.252 m/g,0.502 cm/g和5.9nm。采用戊二醛为交联剂将漆酶固定在SiO@FeO纳米花上,制备固定化漆酶(Laccase-gA-SiO@FeO)。研究发现,65 C和p H 4.0为Laccase-gA-SiO@FeO的最适温度和最适p H。Laccase-gA-SiO@FeO的p H、热、贮存和机械稳定性均比游离酶好。重复使用10次后,Laccase-gA-SiO@FeO活性仍能维持原有活性的83%。此外,对于酸性红88、铬黑T和活性黑5,Laccase-gA-SiO@FeO的脱色率分别为97%、98.3%和51%,均高于游离酶,有利于工业应用。(2)以CTAB为模板剂,FeO-MWCNTs为基体材料,TEOS为硅源,合成了FeO-MWCNTs@SiO纳米复合材料。采用离子交换法去除模板剂CTAB。氮气吸附-脱附等温线显示,FeO-MWCNTs@SiO纳米复合材料的比表面积为428.1 m/g,介孔孔径为11.47 nm。用戊二醛作为交联剂将漆酶固定在FeO-MWCNTs@SiO中,得到一种稳定的固定化酶Laccase-gA-FeO-MWCNTs@SiO。研究发现,Laccase-gA-FeO-MWCNTs@SiO的最适温度和p H分别为60°C和3.0。与游离漆酶相比,Laccase-gA-FeO-MWCNTs@SiO在p H、热、贮存和机械稳定性方面均有所提高。重复使用10次后,固定化漆酶仍能保持原有活性的87%。研究了酶对酸性红88、铬黑T和活性黑5的脱色作用,固定化漆酶的脱色率分别为98%、99%和66%,均高于游离酶。(3)以FeO-MWCNTs@SiO纳米复合材料为模板,采用金属亲和吸附法制备了ZIF-8包覆的多壁碳纳米管(ZIF-8@MWCNTs)纳米复合材料。结果表明,所制备的ZIF-8@MWCNTs纳米复合材料的比表面积为328.778 m/g,孔体积为0.714 cm/g,平均孔径为4.149 nm。Laccase@ZIF-8@MWCNTs的最适温度和最适p H分别为60C和p H 3.0。与游离酶相比,固定化酶在p H、热、贮存和操作稳定性等方面都有所提高。重复使用10次后,Laccase@ZIF-8@MWCNTs仍然保留了68%的初始酶活。对酸性红88和铬黑T的脱色方面,固定化漆酶的脱色率分别达95.6%和97.4%,均高于游离酶。

关键词：染料脱色硅基纳米复合材料固定化酶漆酶金属-有机框架材料

Treatment of Unicameral and Aneurysmal Bone Cysts by Minimally Invasive Percutaneous Injection of grafton DBF Putty Using the Kyphon Cement Delivery System

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Open Journal of Orthopedics 2020年第7期10卷 143-151页

作者： g. Ulrich Exner pascal A. Schai Orthopaedie Zentrum Zuerich Zuerich Switzerland Luzerner Kantonsspital Wolhusen Wolhusen Switzerland

Background: Simple Unicameral and Aneurysmal Bone Cysts are benign lesions that may heal spontaneously especially after fracture which may be the first symptom. However, often size increases causing pain, and complica... 详细信息

g>Background: g>Simple Unicameral and Aneurysmal Bone Cysts are benign lesions that may heal spontaneously especially after fracture which may be the first symptom. However, often size increases causing pain, and complications of fractures can severely compromise the patient.g> Aim:g> The results in a series of cases treated minimally invasive using a new device for the application of allogenic bone material appear highly promising and shall be presented. g>Patients and Methods:g> Eight consecutive patients with symptomatic Unicameral Bone Cysts (UBC) were treated by percutaneous instillation of grafton? DBF Putty (demineralised allogenic bone containing fibers) mixed with autologous bone marrow using the Kyphon? Cement Delivery System (Medtronic), which allows the injection of this high viscosity paste by controlled high pressure. Five patients with Aneurysmal Bone Cysts (ABC) were treated accordingly after inactivation by Aethoxysclerol 3% and lacking bone formation. Using this approach a high rate of bone regeneration was observed in these patients at 8 months to 5 years follow-up (f/u). g>Conclusion:g> The presented technique of a minimally invasive biologic treatment led to highly satisfying results using the grafton? DBF Putty with its higher potential for bone regeneration than demineralized bone matrix not containing fibres (DBM).

关键词： Simple Unicameral Bone Cyst Aneurysmal Bone Cyst DBF Putty Kyphon Cement Delivering System Bone Marrow Percutaneous Treatment

Effects of stinging nettle (Urtica dioica) powder on laying performance,egg quality,and serum biochemical parameters of Japanese quails

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Animal Nutrition 2019年第4期5卷 410-415页

作者： Nassim Moula Ahmed Sadoudi Leghel Touazi pascal Leroy Fikremariam geda Department of Animal Production Fundamental and Applied Research for Animal and HealthFaculty of Veterinary MedicineLiege UniversityQuartier Vallee 2Liege B 4000Belgium Ecole Nationale Superieure Veterinaire Rue Issad AbbesOued SmarAlgiers 16000Algeria

The aim of this experiment was to evaluate the effects of dietary supplementation of stinging nettle powder(SNP) on laying performance,egg quality,and some selected serum biochemical parameters of *** hundred and forty-four 10-wk-old Japanese quails(initial body weight=199±18 g) were divided into 3 dietary treatment groups(basic diet without SNP [SNPO],SNPO with 3% SNP [SNP3],SNPO with 6% SNP [SNP6]) with 4 replicates of 12 quails for a rearing period of 12 *** 22 wk of age,the final body weights of the SNP3 and SNP6 groups were significantly(P=0.001) reduced compared to that of the SNPO *** feed intake was not statistically different among the *** mean number of eggs laid ranged from 65 to 69 with laying rates from 76.8% to 82.1%.The percentage of cracked eggs was not significantly different among the groups and ranged from 1.6% to 1.9%.The egg weight was similar and the feed conversion ratio was closer among the *** egg yolk cholesterol,serum cholesterol and serum triglyceride levels in the SNP6 group were significantly reduced(P g were not significantly influenced by the *** conclusion,the results demonstrated that the supplementation of SNP to the quail diet at the level of 6%reduced quail egg yolk cholesterol,serum total cholesterol and serum triglyceride levels and did not negatively influence quail performance.

关键词： Stinging nettle Japanese quail Performance Egg quality Serum parameters

Orexins:A promising target to digestive cancers,inflammation,obesity and metabolism dysfunctions

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World Journal of gastroenterology 2021年第44期27卷 7582-7596页

作者： Alain Couvineau Thierry Voisin pascal Nicole Valerie gratio Anne Blais INSERM UMR1149/Inflammation Research Center Team“From inflammation to cancer in digestive diseases”labeled by“la Ligue Nationale contre le Cancer”University of ParisDHU UNITYParis 75018France UMR PNCA AgroParisTechINRAUniversitéParis-SaclayParis 75005France

Hypothalamic neuropeptides named hypocretin/orexins which were identified in 1998 regulate critical functions such as wakefulness in the central nervous *** past 20 years had revealed that orexins/receptors system was also present in the peripheral nervous system where they participated to the regulation of multiple functions including blood pressure regulation,intestinal motility,hormone secretion,lipolyze and reproduction *** to these peripheral functions,it was found that orexins and their receptors were involved in various diseases such as acute/chronic inflammation,metabolic syndrome and *** present review suggests that orexins or the orexin neural circuitry represent potential therapeutic targets for the treatment of multiple pathologies related to inflammation including intestinal bowel disease,multiple sclerosis and septic shock,obesity and digestive cancers.

关键词： Orexin Neuropeptide g-protein coupled receptor superfamily Inflammation Metabolic syndrome Cancer

Opposing intraspecific *** diversity effects on herbivory and growth in subtropical experimental tree assemblages

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Journal of Plant Ecology 2017年第1期10卷 242-251页

作者： Christoph Z.Hahn pascal A.Niklaus Helge Bruelheide Stefan g.Michalski Miaomiao Shi Xuefei Yang Xueqin Zeng Markus Fischer Walter Durka Helmholtz Centre for Environmental Research—UFZ Department of Community Ecology(BZF)Theodor-Lieser-Straße 4D-06120 HalleGermany Department of Evolutionary Biology and Environmental Studies University of ZürichWinterthurerstrasse 190CH-8057 ZürichSwitzerland Institute of Biology Martin Luther University Halle-WittenbergAm Kirchtor 106108 HalleGermany german Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5e04103 LeipzigGermany South China Botanical garden 723 Xingke RoadGuangzhou 510650China Key Laboratory of Biodiversity and Biogeography Kunming Institute of BotanyChinese Academy of Sciences132 Lanhei RoadKunming 650204China Kadoorie Farm and Botanic garden Lam Kam RoadTai PoNew TerritoriesHong Kong Institute of Plant Sciences University of BernAltenbergrain 21CH-3013 BernSwitzerland

Aims Positive plant diversity-ecosystem function relations are ultimately driven by variation in functional traits among individuals that form a *** date,research has largely focused on the role of species diversity for ecosystem ***,substantial intraspecific trait variation is common and a significant part of this variation caused by genetic differences among ***,we studied the relative importance of species diversity and seed family(SF)diversity within species for growth and herbivory in experimental subtropical tree *** In 2010,we set up a field experiment in subtropical China,using four species from the local species *** were raised from seeds,with seeds from the same mother tree forming an *** established 23 plots containing one or four species(species diversity treatment)and one or four SFs per species(SF diversity treatment).Tree growth(stem diameter,plant height and crown expansion)and herbivory(percentage leaf loss due to leaf chewers)were monitored annually from 2011 to *** findings Tree species richness promoted growth but had no effect on *** contrast,SF diversity reduced growth and increased herbivory but only so in species *** of the observed effects were time dependent,with the largest effect found in *** results suggest that biodiversity can affect plant performance directly via tree species-species interactions,or context dependent,via potential effects on inter-trophic *** important conclusions should be drawn from our ***,in future studies regarding biodiversity and ecosystem functioning(BEF)relationships,intraspecific genetic diversity should be given similar weight as species diversity as it has often been neglected and its effects are not well ***,we demonstrate opposite effects of biodiversity among and within species,stressing the importance to consider the effects of multiple levels of biodiversity simul

关键词： BEF-China species diversity genetic diversity growth herbivory

Finite-Size Conformational Transitions: A Unifying Concept Underlying Chromosome Dynamics

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Communications in Theoretical Physics 2014年第10期61卷 607-616页

作者： Bertrand R.Caré pascal Carrivain Thierry Forné Jean-Marc Victor Annick Lesne Laboratoire de Physique Théorique de la Matière Condensée CNRS UMR 7600UPMC University Paris 06F-75005ParisFrance CNRS gDR 3536 UPMC University Paris 06F-75005ParisFrance Institut de génétique Humaine CNRS UPR 1142 MontpellierFrance Institut de génétique Moléculaire de Montpellier CNRS UMR 5535University of MontpellierMontpellierFrance Kavli Institute for Theoretical Physics China CAS

Investigating average thermodynamic quantities is not sufficient to understand conformational transitions of a finite-size polymer. We propose that such transitions are better described in terms of the probability distribution of some finite-size order parameter, and the evolution of this distribution as a control parameter varies. We demonstrate this claim for the coil-globule transition of a linear polymer and its mapping onto a two-state model. In a biological context, polymer models delineate the physical constraints experienced by the genome at different levels of organization,from DNA to chromatin to chromosome. We apply our finite-size approach to the formation of plectonemes in a DNA segment submitted to an applied torque and the ensuing helix-coil transition that can be numerically observed, with a coexistence of the helix and coil states in a range of parameters. Polymer models are also essential to analyze recent in vivo experiments providing the frequency of pairwise contacts between genomic loci. The probability distribution of these contacts yields quantitative information on the conformational fluctuations of chromosome regions. The changes observed in the shape of the distribution when the cell type or the physiological conditions vary may reveal an epigenetic modulation of the conformational constraints experienced by the chromosomes.

关键词： coil-globule transition helix-coil transition chromosome conformational capture two-state model

generalized food-deceptive orchid species flower earlier and occur at lower altitudes than rewarding ones

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Journal of Plant Ecology 2010年第4期3卷 243-250页

作者： Loıc Pellissier pascal Vittoz Antonina Ingrid Internicola Luc Daniel Bienvenu gigord Department of Ecology and Evolution University of LausanneBiophoreCH-1015 LausanneSwitzerland Faculty of geosciences and Environment University of LausanneBiophoreCH-1015 LausanneSwitzerland Conservatoire Botanique National de Mascarin 2 rue du Pe`re GeorgesLes Colimac xons97436 Saint-LeuLa Re´unionFrance Present address:Department of Biological Sciences 2500 University Drive N.W.University of CalgaryCalgary ABAlbertaCanada T2N 1N4

Aims Food-deceptive pollination,in which plants do not offer any food reward to their pollinators,is common within the *** food-deceptive orchids are poorer competitors for pollinator visitation than rewarding orchids,their occurrence in a given habitat may be more constrained than that of rewarding *** particular,the success of deceptive orchids strongly relies on several biotic factors such as interactions with co-flowering rewarding species and pollinators,which may vary with altitude and over *** study compares generalized food-deceptive(*** sexually deceptive)and rewarding orchids to test whether(i)deceptive orchids flower earlier compared to their rewarding counterparts and whether(ii)the relative occurrence of deceptive orchids decreases with increasing *** To compare the flowering phenology of rewarding and deceptive orchids,we analysed data compiled from the literature at the species level over the occidental Palaearctic *** flowering phenology can be constrained by the latitudinal distribution of the species and by their phylogenetic relationships,we accounted for these factors in our *** compare the altitudinal distribution of rewarding and deceptive orchids,we used field observations made over the entire Swiss territory and over two Swiss mountain *** Findings We found that deceptive orchid species start flowering earlier than rewarding orchids do,which is in accordance with the hypotheses of exploitation of naive pollinators and/or avoidance of competition with rewarding co-occurring ***,the relative frequency of deceptive orchids decreases with altitude,suggesting that deception may be less profitable at high compared to low altitude.

关键词： altitude timing of flowering food-deception European orchids Orchidaceae biogeography