检索结果-南通市图书馆

tuning the properties of confined water in standard and lybrid nanotubes： An infrared spectroscopic study

Nano Research 2018年第9期11卷 4759-4773页

作者： Yuanyuan Liao Pierre Picot Maxime Laine Jean-Blaise Brubach Pascale Roy Antoine Thill sophie le caer LIONS NIMBE UMR 3685 CEA CNRS Universite Paris-Saclay CEA Saclay Bt. 546 F-91191 Gif-sur-Yvette Cedex France Synchrotron SOleIL AIleS Beamline L'Orme des Mefisier Saint-Aubin BP 48 F-91192 Gif-sur-Yvette Cedex France

Imogolite is a natural nanotubular aluminum silicate clay mineral found in volcanic soils. Its well-defined, tunable structure makes it a good candidate for studying water confinement in a one-dimensional （1D） structure. Water confinement in self-sustaining imogolite thin films was studied using infrared spectroscopy. Two types of synthetic imogolites were investigated： pristine imogolite （IMO-OH） with a hydrophilic inner surface covered with Si-OH groups and hybrid imogolite （IMO-CH3） with a hydrophobic inner surface covered with Si-CH3 groups. Both imogolites have an outer surface that is covered with Al-OH groups. Infrared spectra were recorded in the 20-4,000 cm^-1 spectral range as a function of relative humidity. Analysis of the O-H stretching band provides information on the H bonding of confined water molecules inside and outside the IMO-OH tubes. The scenario for water filling as a function of relative humidity is determined for both systems. Adsorption begins in the IMO-OH tubes at the lowest relative humidity （〈 10%）. The inner surface of the tubes is first covered with water molecules; then, the central part of the tubes is filled, leading to very strong H bonds and a structured spectrum. In contrast, the H bonds of water adsorbed on the outer surfaces of these tubes are weaker. A different scenario is observed for water inside IMO-CH3： Weakly H-bonded water molecules are present, similar to that observed in carbon nanotubes. Water confinement in imogolites is governed by the hydrophilicity of the inner walls. At similar partial pressures, the degree of H bonding depends on the interactions between water and the nanotube wall.

关键词： imogolite nanotubes confinement infrared spectroscopy water isotherms hydrophilic hydrophobic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

le Comptoir de Pierre Gagnaire Welcomes New Chef Ramses Navarro

引用

城市漫步（GBA版） 2024年第6期 24-27页

作者： sophie Steiner 不详

Celebrity chef Pierre Gagnaire,a Frenchman studded with 14 Michelin stars at time of writing,opened his first Chinese mainland restaurant inside the Capella Shanghai,Jian Ye Li estate in *** of its stately surrounds,the restaurant'le Comptoir de Pierre Gagnaire'-which broadly translates to'Pierre Gagnaire's Bar'-is a super casual,soup and sandwich sort of place,as you can imagine.

关键词： restaurant translate mainland

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Associations between physical activity levels and ATPase inhibitory factor 1 concentrations in older adults

引用

Journal of Sport and Health Science 2024年第3期13卷 409-418页

作者： Jérémy Raffin Yves Rolland Annelise Genoux Guillaume Combes Mikael Croyal Bertrand Perret sophie Guyonnet Bruno Vellas Laurent O.Martinez Philipe de Souto Barreto For the MAPT/DSA Group Institut du Vieillissement Gérontopôle de ToulouseCentre Hospitalo-Universitaire de ToulouseToulouse 31000France Centre d'Epidémiologie et de Recherche en Santédes Populations UnitéMixte de Recherche 1295Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse-III-Paul-SabatierToulouse 31000France LimitAging Team Institut des Maladies Métaboliques et CardiovasculairesUnitéMixte de Recherche 1297Institut National de la Santéet de la Recherche MédicaleUniversitéToulouse III-Paul SabatierToulouse 31432France Service de Biochimie Pôle de biologieHôpital de PurpanCentre Hospitalo-Universitaire de ToulouseToulouse 31300France L'Institut du Thorax Institut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France BioCore US16Structure Fédérative de Recherche BonamyInstitut National de la Santéet de la Recherche MédicaleCentre National de la Recherche ScientifiqueCentre Hospitalo-Universitaire de NantesNantes UniversitéNantes 44000France Plate-forme de spectrométrie de masse Centre de Recherche en Nutrition HumaineOuestNantes 44000France 不详

Background:Adenosine triphosphatase inhibitory factor 1(IF1)is a key protein involved in energy ***1 has been linked to various agerelated diseases,although its relationship with physical activity(PA)remains ***,the apolipoprotein A-I(apoA-I),a PA-modulated lipoprotein,could play a role in this relationship because it shares a binding site with IF1 on the cell-surface ATP *** examined here the associations between chronic PA and plasma IF1 concentrations among older adults,and we investigated whether apoA-I mediated these ***:In the present work,1096 healthy adults(63.8%females)aged 70 years and over who were involved in the Multidomain Alzheimer Prevention Trial study were ***1 plasma concentrations(square root of ng/mL)were measured at the 1-year visit of the Multidomain Alzheimer Prevention Trial,while PA levels(square root of metabolic equivalent task min/week)were assessed using questionnaires administered each year from baseline to the 3-year *** linear regressions were performed to investigate the associations between the first-year mean PA levels and IF1 *** analyses were conducted to examine whether apoA-I mediated these *** linear regressions were carried out to investigate whether the 1-year visit IF1 concentrations predicted subsequent changes in ***:Multiple linear regressions indicated that first-year mean PA levels were positively associated with IF1 concentrations(B=0.021;SE=0.010;p=0.043).Mediation analyses revealed that about 37.7%of this relationship was mediated by apoA-I(B_(ab)=0.008;SE=0.004;p=0.023).Longitudinal investigations demonstrated that higher concentrations of IF1 at the 1-year visit predicted a faster decline in PA levels over the subsequent 2 years(time×IF1:B=0.148;SE=0.066;p=0.025).Conclusion:This study demonstrates that regular PA is associated with plasma IF1 concentrations,and it suggests that apoA-I partly med

关键词： Aging Apolipoprotein Bioenergetics Exerkine Mitochondria

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Isolation and characterization of five novel mini-M conotoxins from the venom of mollusk-hunter snail Conus bandanus

引用

Asian Pacific Journal of Tropical Biomedicine 2020年第8期10卷 343-352页

作者： Nguyen Bao Jean-Pière le caer Phan Thi Khanh Vinh Faculty of Food Technology Nha Trang University02 Nguyen Dinh ChieuNha TrangKhanh HoaVietnam Institut de Chimie des Substances Naturelles Centre de Recherche de Gif-FRC3115-UPR 2301F-91198 Gif-sur-YvetteFrance

Objective:To determine the new M-superfamily conotoxins from molluscivorous snail Conus bandanus in ***:Conus bandanus venom was fractionated and purified on HPLC system with an analytical reversed-phase C18 column in order to screen small *** primary structure of peptide was analyzed by matrix-assisted laser desorption/ionization time of flight tandem mass spectrometry using collision-induced dissociation and confirmed by Edman’s degradation ***:Five new conotoxins were biochemically characterized from the crude venom of the mollusk-hunting cone snail Conus bandanus,which were collected at Ke Ga reef of the Nha Trang Bay(Vietnam).Each conotoxin had 15 or 16 amino acid residues and shared the same characteristic cysteine framework V as–CC–C–C–CC–.They were termed as Bn3 b,Bn3 c,Bn3 d,Bn3 e and Bn3 f following the conotoxins ***:The conotoxins Bn3 b,Bn3 e,and Bn3 f are categorized in the mini-M conotoxins of the M1 branch,while conotoxins Bn3 c and Bn3 d are categorized in the mini-M conotoxins of the M2 *** homological analysis reveals that these conotoxins could serve as promising probe compounds for voltage-gated sodium channels.

关键词： Mini-M conotoxin Conus bandanus Cone snail venom

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Xyloglucan Molar Mass on Rheological Properties of Cellulose Nanocrystal/Xyloglucan Hydrogels

引用

Journal of Renewable Materials 2019年第12期7卷 1381-1390页

作者： Malika Talantikite Antoine Gourlay sophie le Gall Bernard Cathala UR1268 Biopolymères Interactions Assemblages INRA44316NantesFrance

Plant components are an inexhaustible source for the construction of bio-based *** we report,for the first time,the elaboration of biobased cellulose nanocrystals(CNC)/xyloglucan(XG)*** is a hemicellulose displaying a great affinity for cellulose surface and can be thus irreversibly adsorbed on *** of the hydrogels were investigated by varying the molar mass of XG either by enzymatic treatment with Endo-glucanase(EG2)or physical fractionation by ultrasound(US).Fractions were characterised by high-performance size exclusion chromatography(HPSEC)and their monosacchari decompositions were *** fractions with high,average and small molar mass,(800,300 and 100103 g/mol respectively),were selected in order to tune the properties of the ***-gel transition conditions were determined for each fraction by achieving phase diagram using the inverted tube *** properties,assessed by rheology,are improved by increasing XG molar mass since elastic modulus is higher for hydrogels formed with higher molar mass fractions as well as the strain at *** formation is likely due to the adsorption of XG fractions on CNC which increases the effective hydrodynamic volume of CNC leading to steric stabilization and interactions between loops and tails of XG adsorbed.

关键词： Cellulose nanocrystals xyloglucan fractions rheology hydrogels

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

COVID-19 patient experiences in prehospital pathways:a processual approach using life-events calendar method and state sequence analysis shows detrimental delays

引用

Family Medicine and Community Health 2024年第1期12卷 45-56页

作者： Romain Lutaud Sebastien Cortaredona lea Delorme Patrick Peretti-watel Juliette Mirouse Manon Borg Lucie Cattaneo Didier Thery Gaetan Gentile Christian Pradier Touitou Irit Philippe Brouqui sophie Tardieu Michel Carles Stéphanie Gentile Department of General Practice Aix-Marseille UniversityMarseilleFrance ADES MarseilleFrance Institut de Recherche pour le Développement(IRD) MarseilleFrance Assistance Publique-Hôpitaux de Marseille(AP-HM) MarseilleFrance INSERM MarseilleFrance Department of Public Health Archet University HospitalNiceFrance MEPHI MarseilleFrance CEReSS-Health Service Research and Quality of life Center MarseilleFrance Department of Infectious Diseases Centre Hospitalier Universitaire de NiceNiceFrance

Objectives To our best knowledge,no study in France has comprehensively investigated the prehospital history of patients admitted for severe cases of COVID-19.‘Patients’voice is an excellent means to capture data on primary care *** aimed to identify clusters of COVID-19 hospitalised patients with similar prehospital symptom sequences,and to test whether these clusters were associated with a higher risk of poor clinical *** Cross-sectional online survey using life-event *** All patients hospitalised for COVID-19 between September 2020 and May 2021 in the Infectious Disease Departments in Nice and in Marseilles in *** 312 patients responded to the *** outcome measures From the day of symptom onset to the day of hospitalisation,we defined a symptom sequence as the time-ordered vector of the successive symptom grades(grade 1,grade 2,grade 3).State sequence analysis with optimal matching was used to identify clusters of patients with similar symptom *** logistic regressions were performed to test whether these clusters were associated with admission to intensive care unit(ICU)and COVID-19 sequelae after *** Three clusters of symptom sequences were identified among 312 complete prehospital pathways.A specific group of patients(29%)experienced extended symptoms of severe COVID-19,persisting for an average duration of 7.5 days before *** group had a significantly higher probability of being admitted to ICU(adjusted OR 2.01).They were less likely to know a loved one who was a healthcare worker,and more likely to have a lower level of ***,this group of patients,who were more likely to have previously visited the emergency room without exhibiting severe symptoms at that time,may have been inclined to postpone reassessment when their health *** relatives played a decisive role in their *** and relevance This study h

关键词： admitted likely life

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Silicon slow light photonic crystals structures:present achievements and future trends

引用

Frontiers of Optoelectronics 2011年第3期4卷 243-253页

作者： Eric CASSAN Xavier le ROUX Charles caer Ran HAO Damien BERNIER Delphine MARRIS-MORINI Laurent VIVIEN Institut d'Electronique Fondamentale Université Paris-Sud CNRS UMR 8622

Slow light in planar photonic structures has attracted for some years an increasing interest due to amazing physical effects it allows or reinforces and to the degrees of freedom it raises for designing new optical functions. Controlling light group velocity is achieved through the use of periodical optical media obtained by nano-structuration of semiconductor wafers at the scale of light wavelength: the so-called photonic crystals. This article reviews present achievements realized in the field of slow light photonic bandgap structures, including the physical principles of slow light to the description of the most advanced integrated optical devices relying on *** and current hot topics related to slow light are discussed to highlight the balance between the advantages and drawbacks of using slow waves in integrated photonic structures. Then, future trends are described, which is focused on the use of slow wave slot waveguides for nonlinear optics and bio-photonic applications.

关键词： slow light photonic crystals silicon photonics integrated optical devices

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Investigation of KTiOPO4 nanocrystals by means of second-harmonic light emission

引用

Chinese Optics letters 2008年第1期6卷 64-67页

作者： Chunyuan Zhou Loc le Xuan Abdallah Slablab Nicolas Sandeau sophie Brasselet Dominique Chauvat Jean-Francois Roch Laboratoire de Photonique Quantique et Moléculaire ENS Cachan UMR CNRS 8537 61 avenue du President Wilson 94235 Cachan Cedex France

The finding of nonlinear nanometric-sized probes is of key importance for the development of nonlinear microscopy in physical as well as biological sciences. We isolate nonlinear KTiOPO4 nanocrystals and study them by second-harmonic generation microscopy （SHGM） and atomic force microscopy （AFM） independently. With both polarization analysis and defocused imaging of the emitted second harmonic field, we extract the Euler angles of the crystalline axes of a single nanocrystal. A balanced coherent optical homodyne detection shows the coherent nature of the nanocrystal nonlinear emission and allows a phase measurement of the emitted second-harmonic field. These features make the KTiOPO4 nanocrystal a good candidate for a vectorial probe of electromagnetic near fields.

关键词： KTiOPO4 谐波光发射物理学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large group-index bandwidth product empty core slow light photonic crystal waveguides for hybrid silicon photonics

引用

Frontiers of Optoelectronics 2014年第3期7卷 376-384页

作者： Charles caer Xavier le ROUX Samuel SERNA Weiwei ZHANG Laurent VIVIEN Eric CASSAN Institut d'Electronique Fondamentale University Paris-Sud CNRS UMR 8622 Bat. 220 91405 Orsay Cedex France

This paper investigates the slow light propaga- tion in silicon on insulator wide slot photonic crystal waveguides （PCWs）. Two design schemes are presented, relying on the dispersion engineering of hole lattice and slot, respectively. Mode patterns and band diagrams are calculated by 3D-plane wave expansion method. Then, coupling and slow light propagations are modeled using finite difference time domain method in a full Mach- Zehnder interferometer （MZI）. Results show high amplitudes interference fringes and high coupling efficiencies. Fabrication and measurement of devices lead to slow light propagation with group indices above 50, while multiple scattering and localized modes near the band edge also observed. This study provides insights for losses in hollow core slot high group index waveguides.

关键词： silicon photonics photonic crystals (PC) slot waveguides slow waves

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Consequences of metabolic syndrome on postoperative outcomes after pancreaticoduodenectomy

引用

World Journal of Gastroenterology 2017年第17期23卷 3142-3149页

作者： Alban Zarzavadjian le Bian David Fuks sophie Chopinet Sébastien Gaujoux Manuela Cesaretti Renato Costi Ajay P Belgaumkar Claude Smadja Brice Gayet Department of Digestive Surgery Centre Hospitalier Simone Veil Laboratory of Medical Ethics and legal Medicine University Paris Descartes Department of Digestive disease-Institut Mutualiste Montsouris UniversitéParis Descartes Department of Digestive Surgery Assistance PubliqueHopitaux de Paris Hopital Cochin Department of Digestive Surgery Assistance PubliqueHopitaux de Paris Hopital Antoine Béclère157 rue de la Porte Trivaux Boulevard Général Leclerc

AIM To analyze immediate postoperative outcomes after pancreaticoduodenectomy regarding metabolic *** In two academic centers, postoperative outcomes of patients undergoing pancreaticoduodenectomy from 2002 to 2014 were prospectively recorded. Patients presenting with metabolic syndrome [defined as at least three criteria among overweight(BMI ≥ 28 kg/m2), diabetes mellitus, arterial hypertension and dyslipidemia] were compared to patients without metabolic *** Among 270 consecutive patients, 29(11%) presented with metabolic syndrome. In univariable analysis, patients with metabolic syndrome were significantly older(69.4 years vs 62.5 years, P = 0.003) and presented more frequently with soft pancreas(72% vs 22%, P = 0.0001). In-hospital morbidity(83% vs 71%) and mortality(7% vs 6%) did not differ in the two groups so as pancreatic fistula rate(45% vs 30%, P = 0.079) and severity of pancreatic fistula(P = 0.257). In multivariable analysis, soft pancreas texture(P = 0.001), pancreatic duct diameter 30 kg/m2(P = 0.041) were identified as independent risk factors of pancreatic fistula after pancreaticoduodenectomy, but not metabolic *** In spite of logical reasoning and appropriate methodology, present series suggests that metabolic syndrome does not jeopardize postoperative outcomes after pancreaticoduodenectomy. Therefore, definition of metabolic syndrome seems to be inappropriate and fatty pancreas needs to be assessed with an international consensual histopathological classification.

关键词： Soft pancreas Postoperative outcomes Metabolic syndrome Pancreaticoduodenectomy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：