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甘氨酸在SiO_2表面的吸附及热缩合反应

催化学报 2005年第5期26卷 393-398页

作者：孟明 Lorenzo Stievano Jean-Franois lambert 天津大学化工学院催化科学与工程系天津300072 法国皮埃尔和玛丽居里大学表面反应性能实验室

考察了甘氨酸水溶液平衡浓度和pH值对其在SiO2 表面吸附行为的影响,采用DTG ,XRD和FT IR等手段对甘氨酸在SiO2 表面的吸附量及晶相结构等进行了表征.结果表明,甘氨酸在SiO2 上的吸附不符合Langmuir吸附模型,当甘氨酸水溶液平衡浓度小于0... 详细信息

考察了甘氨酸水溶液平衡浓度和pH值对其在SiO2 表面吸附行为的影响,采用DTG ,XRD和FT IR等手段对甘氨酸在SiO2 表面的吸附量及晶相结构等进行了表征.结果表明,甘氨酸在SiO2 上的吸附不符合Langmuir吸附模型,当甘氨酸水溶液平衡浓度小于0 0 73mol/L时,主要为特定位置吸附,此时SiO2 对甘氨酸的吸附源于其表面≡Si-O-基团与甘氨酸离子的-NH+3 端的相互作用;当平衡浓度大于0 0 73mol/L时,呈多层吸附,形成α和β两种晶型的甘氨酸.用TPD MS对甘氨酸的热缩合行为进行了考察,结合FT IR结果表明,产物为环状二聚体哌嗪二酮(DKP) ,没有检测到线式二聚体以及表面硅酯类物种形成.SiO2 对表面吸附的甘氨酸分子产生了诱导活化,使其热缩合温度与体相α甘氨酸相比降低了5 0℃左右.

关键词：甘氨酸二氧化硅吸附热缩合二酮哌嗪

Swimrun race,athletes,safety and performance:A brief review

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Sports Medicine and Health Science 2021年第4期3卷 207-211页

作者： C.H.Geromont M.lambert A.N.Bosch Division of Physiological Sciences Department of Human BiologyFaculty of Health SciencesUniversity of Cape TownCape TownSouth Africa

Swimrun was established in Sweden in *** competition athletes alternate between running and swimming multiple *** has grown from only being hosted in Sweden to now being a global *** swimrun race exposes athletes to environments that require a unique set of *** example,participants have to negotiate ocean currents and *** environmental conditions change between the runs and the *** may be exposed to hot temperatures when running in wetsuits(25℃and hotter)and cold water(colder than 16℃)when *** sudden change in environmental conditions imposes a poorly defined physiological stress on the *** on the demands of swimrun is *** research is needed to improve athlete safety during ***,research is needed to provide insight into enhancing training methods and performance.

关键词： Swimrun Athletic performance Cold water swimming

Adélie penguins and temperature changes in Antarctica: a long-term view

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Integrative Zoology 2012年第2期7卷 113-120页

作者： Craig D.MILLAR Sankar SUBRAMANIAN Tim H.HEUPINK Siva SWAMINATHAN Carlo BARONI David M.lambert Allan Wilson Centre for Molecular Ecology and Evolution University of Auckland Griffith School of Environment and School of Biomolecular and Physical Sciences Griffith UniversityAustralia Environment Protection Training and Research Institute HyderabadIndia Department of Earth Sciences University of PisaPisaItaly

During the summer months,Adélie penguins represent the dominant biomass of terrestrial *** millions of individuals nest in ice-free areas around the coast of the ***,these modern populations of Adélie penguins have often been championed as an ideal biological indicator of ecological and environmental changes that we currently *** addition,Adélie penguins show an extraordinary record of sub-fossil remains,dating back to the late *** this time,temperatures were much lower than ***,this species offers unique long-term information,at both the genomic and ecological levels,about how a species has responded to climate change over more than 40000 years.

关键词： Adélie penguins climate change global warming penguin evolution

Investigation of Li-ion transport in Li7P3S11 and solid-state lithium batteries

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Journal of Energy Chemistry 2019年第11期28卷 1-7页

作者： Chuang Yu Swapna Ganapathy Ernst R.H.van Eck lambert van Eijck Niek de Klerk Erik M.Kelder Marnix Wagemaker Department of Radiation Science and Technology Delft University of TechnologyMekelweg 152629JB Delftthe Netherlands Institute for Molecules and Materials Radboud University NijmegenHeyendaalseweg 1356525 AJ Nijmegenthe Netherlands

The high Li-ion conductivity of the Li7P3S11 sulfide-based solid electrolyte makes it a promising candidate for all-solid-state lithium batteries. The Li-ion transport over electrode-electrolyte and electrolyteelectrolyte interfaces, vital for the performance of solid-state batteries, is investigated by impedance spectroscopy and solid-state NMR experiments. An all-solid-state Li-ion battery is assembled with the Li7P3S11 electrolyte, nano-Li2S cathode and Li-In foil anode, showing a relatively large initial discharge capacity of 1139.5 m Ah/g at a current density of 0.064 m A/cm^ 2 retaining 850.0 m Ah/g after 30 cycles. Electrochemical impedance spectroscopy suggests that the decrease in capacity over cycling is due to the increased interfacial resistance between the electrode and the electrolyte. 1D exchange ^7Li NMR quantifies the interfacial Li-ion transport between the uncycled electrode and the electrolyte, resulting in a diffusion coefficient of 1.70(3) ×10^-14cm^2/s at 333 K and an energy barrier of 0.132 e V for the Li-ion transport between Li2S cathode and Li7P3S11 electrolyte. This indicates that the barrier for Li-ion transport over the electrode-electrolyte interface is small. However, the small diffusion coefficient for Li-ion diffusion between the Li2S and the Li7P3S11 suggests that these contact interfaces between electrode and electrolyte are relatively scarce, challenging the performance of these solid-state batteries.

关键词： Li7P3S11 Li-ion transport Spin-lattice NMR Exchange NMR Solid-state battery

Valve-in-Valve Transcatheter Aortic Valve Replacement in a High-Risk Patient with a Biocor Bioprosthesis and a Flail Prosthetic Valve Leaflet

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Cardiovascular Innovations and Applications 2022年第1期6卷 191-194页

作者： Oliver Abela Michael Schoeller Parker Williams Charles lambert Marc Bloom AdventHealth Tampa Pepin Heart Institute Cardiology3100 East Fletcher AvenueTampaFL 33613USA DeBusk College of Osteopathic Medicine Lincoln Memorial UniversityCardiology6965 Cumberland Gap ParkwayHarrogateTN 37752USA AdventHealth Tampa Pepin Heart Institute Cardiothoracic Surgery3100 East Fletcher AvenueTampaFL 33613USA

An 80-year-old woman with a history of surgical aortic valve replacement with a 21 mm *** Medical Biocor porcine aortic valve 14 years prior presented with New York Heart Association(NYHA)class III symptoms,severe aortic insufficiency from a degenerated prosthesis,and a large echocardiographic mobile mass representing a highly mobile prosthetic *** patient worsened to NYHA class IV symptoms despite medical *** So-ciety of Thoracic Surgery mortality risk score was extremely ***,a valve-in-valve transcatheter aortic valve replacement(TAVR)was found to be a reasonable *** used a 20 mm SAPIEN 3 Ultra valve(Edwards Lifesciences Inc.,Irvine,CA,USA)with a SENTINEL embolic protection device(Boston Scientific,Marlborough,MA,USA).During valve deployment,the echocardiographic mobile mass was visually pinned between the new TAVR valve and the surgical bioprosthetic *** large embolic debris was noted within the embolic protection device,and the patient remained without any new focal neurologic deficits in the perioperative period and at the 30-day *** severe aortic insufficiency resolved,and the patient clinically improved to NYHA class II symptoms.

关键词： Bioprosthetic TAVR Regurgitation

Efficient quantum simulation of open quantum dynamics at various Hamiltonians and spectral densities

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Frontiers of physics 2021年第5期16卷 47-60页

作者： Na-Na Zhang Ming-Jie Tao Wan-Ting He Xin-Yu Chen Xiang-Yu Kong Fu-Guo Deng Neill lambert Qing Ai Department of Physics Applied Optics Beijing Area Major LaboratoryBeijing Normal UniversityBeijing100875China Space Engineering University Beijing101416China Department of Physics Tsinghua UniversityBeijing100084China Theoretical Quantum Physics Laboratory RIKEN Cluster for Pioneering ResearchWako-shiSaitama351-0198Japan

Simulation of open quantum dynamics for various Hamiltonians and spectral densities are ubiquitous for studying various quantum *** a quantum computer,only log2N qubits are required for the simulation of an N-dimensional quantum system,hence simulation in a quantum computer can greatly reduce the computational complexity compared with classical ***,a quantum simulation approach was proposed for studying photosynthetic light harvesting[npj Quantum Inf.4,52(2018)].In this paper,we apply the approach to simulate the open quantum dynamics of various photosynthetic *** show that for Drude—Lorentz spectral density,the dimerized geometries with strong couplings within the donor and acceptor clusters respectively exhibit significantly improved *** also demonstrate that the overall energy transfer can be optimized when the energy gap between the donor and acceptor clusters matches the optimum of the spectral *** effects of different types of baths,e.g.,Ohmic,sub-Ohmic,and super-Ohmic spectral densities are also *** present investigations demonstrate that the proposed approach is universal for simulating the exact quantum dynamics of photosynthetic systems.

关键词： nuclear magnetic resonance quantum simulation open quantum system

Evolution of a Holocene banner bank controlled by morphodynamics and structural setting of a macrotidal coast: Saint-Brieuc Bay (NW-Europe)

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Geoscience Frontiers 2021年第5期12卷 166-181页

作者： Kalil Traoréa David Menier Erwan Gensac Pascal Le Roy Clément lambert Paul Bessin Kevin Pedoja Anne Duperret Romain Le Gall Laboratoire Géoscience Océan UMR 6538CNRSUniversitéBretagne SudCampus de Tohannic56000 VannesFrance Laboratoire Géoscience Océan UMR 6538CNRSIUEMUniversitéBretagne Occidentale29280 PlouzanéFrance Laboratoire de Planétologie et Géodynamique UMR 6112CNRSLe Mans UniversitéAvenue Olivier Messiaen72085 Le Mans CEDEX 9France Laboratoire Morphodynamique Continentale et Côtière UMR 6143CNRSUniversitéCaen Normandiecampus 12-4Rue des Tilleuls14000 Caen cedexFrance Laboratoire Ondes et Milieux Complexes UMR 6294CNRSUniversitéLe Havre Normandie53 rue de PronyCS8054076058 Le Havre cedexFrance

The morphology and internal structure of the Horaine Bank(Bay of Saint-Brieuc,NW France)are described based on multibeam echosounder and high-resolution seismic datasets coupled with vibro-core *** Horaine Bank shows large-scale bedforms in the lee of a submerged rocky shoal,which allowed defining it as a Banner *** internal structure of the sandbank reveals four seismic units(U1-U4)on a Cambrian basement(U0).The basal unit U1 is interpreted as reworked lowstand fluvial sediments those infilled micro incised valleys during a rise in sea *** unit is overlain by paleo-coastal barrier sand-spit(U2)whose development was controlled by swell in the context of a rapid rise in sea *** successive prograding unit(U3)is interpreted as flooding deposits in continuity with unit *** unit U4 is characterized by oblique reflectors oriented in two opposite *** last unit,dated post 3500 yr BP,corresponds to migrating dunes superimposed on the bank and observable in the high-resolution bathymetric *** strong correlation between tidal currents and the apparent clockwise migration of dune crests suggests the presence of a tidal gyre controlling the present-day dynamics of most of the Horaine bank *** study proposes a new model for the construction of banner banks characterized by the gradual transition of a sand spit to a banner bank during marine transgression and ensuing hydrodynamic variability.

关键词： Sand banks Banner bank Holocene climate Geomorphology Sea level rise Tidal gyre

Microsoft Office Access 2007 step by step

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