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Materials Sciences and Applications 2018年第1期9卷 155-173页

作者： christopher Betzin Holger Wolfschmidt Siemens AG ErlangenGermany Friedrich-alexander-University ErlangenGermany

In this paper, commercial lithium ion battery cells consisting of graphite based anode and LiNi0.80Co0.15Al0.05O2 (NCA) oxide based cathode were investigated regarding their aging behavior. The capacity loss is dependent on the state of charge (SOC) whereas the battery is operated with partial cycles at defined SOCs. The structural change of the positive electrode material is identified as dominating aging process. Especially grid services such as primary control reserve are of economic interest for battery system operators. In this application, small charge and discharge cycles are the main operation mode. Considering the operation of single battery storage systems in a virtual storage power plant, different states of charges are much more of interest. Thus the battery aging behavior of lithium ion cells with NCA based cathode material with respect to cycling at specific state of charge with small depth of discharge (DOD) is investigated. The results in this paper provide understanding of small DOD cycling at given SOC behavior which is necessary for NCA lifetime prediction in this particular case, especially in virtual storage plant with various storage systems and thus various SOCs for delivery primary reserve the small DOD behavior which has an important impact on efficiency and economy. It is a key finding, which aging mechanisms are essential in order to optimize the cell operation and adapt it to system performance.

关键词： Cyclic Voltammetry NCA Fatigue of LiNCAO Primary Control Reserve

Boron nitride for enhanced oxidative dehydrogenation of ethylbenzene

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Journal of Energy Chemistry 2021年第6期30卷 477-484,I0012页

作者： Rui Han Jiangyong Diao Sonu Kumar Andrey Lyalin Tetsuya Taketsugu Gilberto Casillas christopher Richardson Feng Liu Chang Won Yoon Hongyang Liu Xudong Sun Zhenguo Huang Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina School of Civil and Environmental Engineering University of Technology SydneyUltimoNew South Wales 2007Australia Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016LiaoningChina Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporo 001-0021Japan Center for Green Research on Energy and Environmental Materials National Institute for Materials Science(NIMS)Tsukuba 305-0044Japan Department of Chemistry Faculty of ScienceHokkaido UniversitySapporo 060-0810Japan Electron Microscopy Centre University of WollongongNew South Wales 2500Australia Molecular Horizons and School of Chemistry and Molecular Bioscience Faculty of ScienceMedicine and HealthUniversity of WollongongNew South Wales 2522Australia Center for Hydrogen and Fuel Cell Research Korea Institute of Science and TechnologySeoul 02792Republic of Korea

It is demonstrated experimentally and confirmed theoretically that highly defective boron nitride showed outstanding performance for oxidative dehydrogenation of *** catalyst is derived from carbon-doped hexagonal boron nitride nanosheets synthesized via a two-step reaction when participating the oxidative dehydrogenation *** first step yields a polymeric precursor with the atomic positions of B,C,N relatively constrained,which is conducive for the formation of carbon atomic clusters uniformly dispersed throughout the BN *** the oxidative dehydrogenation of ethylbenzene to styrene,the nanoscale carbon clusters are removed and highly defective boron nitride(D-BN)is obtained,exposing boron-rich zigzag edges of BN that act as the catalytic *** catalytic performance of D-BN is therefore remarkably better than un-doped *** results indicate that dispersed C-doping in h-BN is highly effective in terms of defect formation and resultant enhanced activity in oxidative dehydrogenation reactions.

关键词： Boron nitride Dehydrogenation Ethylbenzene Carbon-doping Heterogeneous catalysis

Revealing the mechanism of amyloid fibril formation by combined single-molecule FRET and kinetic modeling

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Revealing the mechanism of amyloid fibril formation by combi...

Crowd-sourcing materials-science challenges with the NOMAD 2018 Kaggle competition

中国化学会第五届全国生物物理化学会议（NCBPC5）

作者：吴思 Jie Yang alexander J.Dear Thomas C.T.Michaels christopher M.Dobson Tuomas P.J.Knowles Sarah Perrett Institute of Biophysics Chinese Academy of Sciences Department of Chemistry University of Cambridge

＜正＞The conversion of native soluble proteins into insoluble amyloid fibrils that are rich in cross β-sheet structure is associated with a variety of neurodegenerative *** has recently become apparent that smaller oligomers formed during the early stages of amyloid fibril formation may be primarily responsible for the toxicity in amyloid *** ensemble techniques have limitations in characterization of oligomers due to the metastable and heterogeneous nature of these prefibrillar species.

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npj Computational Materials 2019年第1期5卷 150-160页

作者： christopher Sutton Luca M.Ghiringhelli Takenori Yamamoto Yury Lysogorskiy Lars Blumenthal Thomas Hammerschmidt Jacek R.Golebiowski Xiangyue Liu Angelo Ziletti Matthias Scheffler Fritz Haber Institute of the Max Planck Society BerlinGermany Research Institute for Mathematical and Computational Sciences(RIMCS) YokohamaJapan ICAMS Ruhr-Universität BochumBochumGermany EPSRC Centre for Doctoral Training on Theory and Simulation of Materials Department of PhysicsImperial College LondonLondonUK Thomas Young Centre for Theory and Simulation of Materials Department of MaterialsImperial College LondonLondonUK

A public data-analytics competition was organized by the Novel Materials Discovery(NOMAD)Centre of Excellence and hosted by the online platform Kaggle by using a dataset of 3,000(Al_(x)GayIn_(1-x-y))_(2)O_(3) *** aim was to identify the best machinelearning(ML)model for the prediction of two key physical properties that are relevant for optoelectronic applications:the electronic bandgap energy and the crystalline formation ***,we present a summary of the top-three ranked ML *** first-place solution was based on a crystal-graph representation that is novel for the ML of properties of *** second-place model combined many candidate descriptors from a set of compositional,atomic-environment-based,and average structural properties with the light gradient-boosting machine regression *** third-place model employed the smooth overlap of atomic position representation with a neural *** Pearson correlation among the prediction errors of nine ML models(obtained by combining the top-three ranked representations with all three employed regression models)was examined by using the Pearson correlation to gain insight into whether the representation or the regression model determines the overall model *** relatively decorrelated models(based on the Pearson correlation)leads to an even higher prediction accuracy.

关键词： energy prediction overlap

Rapid-Scan Nonlinear Time-Resolved Spectroscopy over Arbitrary Delay Intervals

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Ultrafast Science 2023年第6期3卷 11-16页

作者： Tobias Flöry Vinzenz Stummer Justinas Pupeikis Benjamin Willenberg alexander Nussbaum-Lapping Edgar Kaksis Franco V.A.Camargo Martynas Barkauskas christopher R.Phillips Ursula Keller Giulio Cerullo Audrius Pugzlys Andrius Baltuška Photonics Institute TU WienViennaAustria Department of Physics ETH ZurichZurichSwitzerland Istituto di Fotonica e Nanotecnologie-CNR Piazza Leonardo da Vinci 3220133 MilanoItaly Light Conversion Ltd. VilniusLithuania Dipartimento di Fisica Politecnico di MilanoPiazza Leonardo da Vinci 3220133 MilanoItaly Center for Physical Sciences&Technology.SavanoriuAve.231 LT-02300 VilniusLithuania.

Femtosecond dual-comb lasers have revolutionized linear Fourier-domain spectroscopy by offering a rapid motion-free,precise,and accurate measurement mode with easy registration of the combs beat note in the radio frequency *** of this technique already found application for nonlinear time-resolved spectroscopy within the energy limit available from sources operating at the full oscillator repetition ***,we present a technique based on time filtering of femtosecond frequency combs by pulse gating in a laser *** gives the required boost to the pulse energy and provides the flexibility to engineer pairs of arbitrarily delayed wavelength-tunable pulses for pump-probe *** a dual-channel millijoule amplifier,we demonstrate programmable generation of both extremely short,fs,and extremely long(>ns)interpulse delays.A predetermined arbitrarily chosen interpulse delay can be directly realized in each successive amplifier shot,eliminating the massive waiting time required to alter the delay setting by means of an optomechanical line or an asynchronous scan of 2 free-running *** confirm the versatility of this delay generation method by measuringχ(2)cross-correlation andχ(3)multicomponent population recovery kinetics.

关键词： amplifier delay repetition

A protocol for optical mapping of Ca2+ dynamics in murine sinoatrial preparation with optogenetic pacing

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A protocol for optical mapping of Ca2+ dynamics in murine si...

2019年中国生理学会心血管生理学术研讨会

作者： Ruirui Dong Razik Mu-u-min christopher O'Shea Shicheng He Alastair Reith Kaizhong Duan Kun Kou alexander Grassam-Rowe Xiaoqiu Tan Davor Pavlovic Xianhong Ou Ming Lei Key Laboratory of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province Institute of Cardiovascular Research at Southwest Medical University Department of Pharmacology University of Oxford

Among the animal models for studying the molecular basis of atrial and sinoatrial node（SAN） biology and disease,the mouse is a widely used species due to its handling and signaling proteins in the *** is therefore highly valuable to develop robust methodologies for studying SAN and atrial electrophysiological function in this ***,we describe a protocol for performing dual calcium-voltage optical mapping on mouse sinoatrial preparation（SAP）,in combination with an optogenetic approach,for studying SAP membrane potential,intracellular Ca2+transients,and pacemaker *** protocol includes the details for preparing an intact SAP,robust tissue dual-dye loading,light-programmed pacing,and high-resolution optical *** protocol provides an example of the use of the combination of optogenetic and optical mapping techniques for investigating SAP membrane potential and intracellular Ca2+transients and pacemaker activity with high temporal and spatial resolution in specific cardiac ***,our protocol provides a useful tool for studying SAP physiology and pathophysiology in mice.

关键词： sinoatrial node optogenetic pacing optical mapping murine heart

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双侧前庭病变时前半规管特异性保留

双侧前庭病变时前半规管特异性保留

Gut sterilization in experimental colitis leukocyte mediated colon injury, and effects on angiogenesis/lymphangiogenesis

中国中西医结合学会眩晕病专业委员会第二次学术大会暨河南省中西医结合学会眩晕病专业委员会第三次学术大会暨眩晕高峰论坛

作者： alexander Andrea TARNUTZER christopher J BOCKISCH Elena BUFFONE Lucas MBACHMANN Konrad P WEBER 苏黎世大学医院神经内科苏黎世大学医院耳鼻咽喉科苏黎世大学医院眼科

双侧前庭功台皂丧失,引起步态不平衡和振动幻视,在很大程度上常被延迟诊断,且潜在的原因明确者仅为50%0%。我们使用视频头脉冲试验(vHIT)来测量水平和垂直半规管的功能,同时假设特异性的vHIT模式可能与某些疾病有关联。我们回顾性地分析...

双侧前庭功台皂丧失,引起步态不平衡和振动幻视,在很大程度上常被延迟诊断,且潜在的原因明确者仅为50%0%。我们使用视频头脉冲试验(vHIT)来测量水平和垂直半规管的功能,同时假设特异性的vHIT模式可能与某些疾病有关联。我们回顾性地分析了109例双侧前庭功能丧失的患者,相关病因包括:氨基糖苷类前庭毒性(n=

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Open Journal of Gastroenterology 2013年第1期3卷 12-24页

作者： Mihir Patel Justin Olinde Allison Tatum Chaitanya V. Ganta Walter E. Cromer Ankur R. Sheth Merilyn H. Jennings J. Michael Mathis Traci Testerman Paul A. Jordan Kenneth Manas christopher P. Monceaux J. Steven alexander Department of Cellular Biology and Anatomy LSU Health Shreveport Shreveport USA Department of Gastroenterology and Hepatology LSU Health Shreveport Shreveport USA Department of Microbiology and Immunology LSU Health Shreveport Shreveport USA Department of Molecular and Cellular Physiology LSU Health Shreveport Shreveport USA

Inappropriate responses to normal commensal bacteria trigger immune activation in both inflammatory bowel disease and experimental colitis. How gut flora contribute to the pathogenesis of inflammatory bowel disease is unclear, but may involve entrapment of leukocytes and remodeling of the vascular system. Here we evaluated how the progression and tissue remodeling in experimental colitis differ in a germ- free model of mouse colitis. Four treatment groups were used: control, antibiotic-treated (ABX), dextran sulfate colitis (DSS) and DSS pre- and co-treated with antibiotics (DSS + ABX). In days 0 - 3 of the study, germ-free mice received antibiotics (vancomycin, neomycin, and metronidazole). During the next 11 days, antibiotics were continued and DSS (3%) added to “colitis” groups. Disease activity, weight, stool form and blood were monitored daily. Mice were sacrificed and tissue samples harvested. Histopathological scores in controls (0.00) and in ABX (1.0+/–0.81) were significantly (p –0). Extents of injury, inflammation and crypt damage were all improved in DSS + ABX. The Disease Activity Index score (day 11) was significantly worse in the DSS group compared to the DSS + ABX group. Stool blood and form scores were also significantly improved among these groups. Importantly, myeloper- oxidase was significantly reduced in DSS + ABX, indicating that neutrophil infiltration was blocked. Colitis was associated with an increase in blood and lymphatic vessels;both of these events were also significantly reduced by gut sterilization. Our experiment shows that clinical and histopathological severity of colitis was significantly worse in the DSS colitis group compared to the DSS + ABX group, supporting the hypothesis that development of IBD is likely to be less severe with appropriate antibiotic treatment. In particular, gut sterilization effectively reduces leuko- cyte-dependent (PMN) injury to improve outcomes and may be an important target for therapy.

关键词： Crohn’s Disease Antibiotics Myeloperoxidase Lymphatics Angiogenesis

Helicobacterinfection decreases basal colon inflammation, but increases disease activity in experimental IBD

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Open Journal of Gastroenterology 2013年第3期3卷 177-189页

作者： christopher P. Monceaux Traci L. Testerman Moheb Boktor Paul Jordan Patrick Adegboyega David J. McGee Merilyn H. Jennings Courtney P. Parker Shelly Gupta Ping Yi Vijay C. Ganta Haidy Galous Kenneth Manas J. Steven alexander Department of Gastroenterology and Hepatology LSU Health Shreveport Shreveport USA Department of Microbiology and Immunology LSU Health Shreveport Shreveport USA Department of Molecular and Cellular Physiology LSU Health Shreveport Shreveport USA Department of Pathology LSU Health Shreveport Shreveport USA

Background: Helicobacter species are best known for their roles in the pathology of gastritis;however, several Helicobacter species also colonize the intestine, and less is known about effects of Helicobacter on the development of intestinal inflammation. To evaluate contributions of Helicobacter in inflammatory bowel disease, we investigated whether and how pre-existing intestinal colonization would affect disease severity and biomarkers of inflammation in experimental IBD. Materials and Methods: Mice were infected with H. muridarum 2 weeks prior to induction of colitis mediated by 3% dextran sulfate (DSS). Disease activity index, stool blood and consistency, colon length, myeloperoxidase, histopathology, blood and lymphatic vessels, and numbers of dilated mucosal crypts were measured in control, DSS-only, H. muridarum-infected, and H. muridarum-infected + DSS mice. Results: Prior to DSS challenge, H. muridarum-infected mice showed little distal gut injury by several indices of colon inflammation with decreased blood vessel density in the submucosa, and lower lymphatic density in the mucosa and submucosa. However, after DSS colitis, H. muridarum-infected mice exhibited significantly greater disease. Weight change, stool bleeding, diarrhea, and angiogenesis were all increased in H. muridarum-infected mice in DSS colitis compared to DSS controls. Conclusions: Our data show that Helicobacter colonization of the intestine, unlike that of the stomach, lowers basal gut inflammatory scores, but increases disease activity and inflammation in an acute colitis model. Intestinal Helicobacter infection may therefore represent a significant sub-clinical factor which predisposes the gut to inflammatory injury.

关键词： Helicobacter Colon Lymphatics Crohn’s Disease Ulcerative Colitis

Risk stratification for ST segment elevation myocardial infarction in the era of primary percutaneous coronary intervention

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World Journal of Cardiology 2014年第8期6卷 865-872页

作者： Richard A Brogan christopher J Malkin Philip D Batin alexander D Simms James M McLenachan christopher P Gale Leeds Institute of Cardiovascular and Metabolic Medicine Division of Epidemiology and BiostatisticsUniversity of LeedsLeeds LS2 9JTUnited Kingdom York and Hull Medical School University of YorkYorkYO10 5DDUnited Kingdom Department of Cardiology Leeds Teaching Hospital NHS TrustLeeds LS2 9JTUnited Kingdom Department of Cardiology Pinderfields General HospitalMid Yorkshire NHS TrustWakefield WF5 9LZUnited Kingdom Department of Cardiology York Teaching Hospital NHS Foundation TrustYork YO10 5DDUnited Kingdom

Acute coronary syndromes presenting with ST elevation are usually treated with emergency reperfusion/revascularisation therapy. In contrast current evidence and national guidelines recommend risk stratification for non ST segment elevation myocardial infarction(NSTEMI) with the decision on revascularisation dependent on perceived clinical risk. Risk stratification for STEMI has no recommendation. Statistical risk scoring techniques in NSTEMI have been demonstrated to improve outcomes however their uptake has been poor perhaps due to questions over their discrimination and concern for application to individuals who may not have been adequately represented in clinical trials. STEMI is perceived to carry sufficient risk to warrant emergency coronary intervention [by primary percutaneous coronary intervention(PPCI)] even if this results in a delay to reperfusion with immediate thrombolysis. Immediate thrombolysis may be as effective in patients presenting early, or at low risk, but physicians are poor at assessing clinical and procedural risks and currently are not required to consider this. Inadequate data on risk stratification in STEMI inhibits the option of immediate fibrinolysis, which may be cost-effective. Currently the mode of reperfusion for STEMI defaults to emergency angiography and percutaneous coronary intervention ignoring alternative strategies. This review article examines the current risk scores and evidence base for risk stratification for STEMI patients. The requirements for an ideal STEMI risk score are discussed.

关键词： ST segment elevation myocardial infarction Risk stratification Primary percutaneous coronary intervention Harm Risk scores