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Driving the sodium-oxygen battery chemistry towards the efficient formation of discharge products: The importance of sodium superoxide quantification

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Journal of Energy Chemistry 2022年第5期31卷 709-720页

作者： marina Enterría Marine Reynaud Juan Ignacio Paredes Lidia Medinilla Reza Younesi Nagore Ortiz-Vitoriano Centre for Cooperative Research on Alternative Energies(CIC energiGUNE) Basque Research and Technology Alliance(BRTA)Vitoria-Gasteiz 01510Spain Instituto de Ciencia y Tecnología del Carbono INCAR-CSICC/Francisco Pintado Fe 26Oviedo 33011Spain Ångström Advanced Battery Centre(ÅABC) Department of Chemistry-Ångström LaboratoryUppsala UniversityUppsala SE-75121Sweden Ikerbasque Basque Foundation for ScienceBilbao 48013Spain

Sodium-oxygen batteries(SOBs) have the potential to provide energy densities higher than the state-ofthe-art Li-ion batteries. However, controlling the formation of sodium superoxide(NaO_(2)) as the sole discharge product on the cathode side is crucial to achieve durable and efficient SOBs. In this work, the discharge efficiency of two graphene-based cathodes was evaluated and compared with that of a commercial gas diffusion layer. The discharge products formed at the surface of these cathodes in a glyme-based electrolyte were carefully studied using a range of characterization techniques. NaO_(2) was detected as the main discharge product regardless of the specific cathode material while small amounts of Na_(2)O_(2).2H_(2)O and carbonate-like side-products were detected by X-ray diffraction as well as by Raman and infrared spectroscopies. This work leverages the use of X-ray diffraction to determine the actual yield of NaO_(2)which is usually overlooked in this type of batteries. Thus, the proper quantification of the superoxide formed on the cathode surface is widely underestimated;even though is crucial for determining the efficiency of the battery while eliminating the parasitic chemistry in SOBs. Here, we develop an ex-situ analysis method to determine the amount of NaO_(2) generated upon discharge in SOBs by transmission X-ray diffraction and quantitative Rietveld analysis. This work unveils that the yield of NaO_(2) depends on the depth of discharge where high capacities lead to very low discharge efficiency, regardless of the used cathode. We anticipate that the methodology developed herein will provide a convenient diagnosis tool in future efforts to optimize the performance of the different cell components in SOBs.

关键词： Na-O_(2)batteries Graphene Transmission X-Ray diffraction Rietveld refinement Na-O_(2)quantification Parasitic chemistry Cathode design

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D-半乳糖葡胺增敏小鼠对非致死剂量细菌脂多糖致死作用与肝脏DNA片段化的高度相关性(英文)

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Acta Pharmacologica Sinica 2003年第3期24卷 3-8页

作者：周炳荣 ,marina GUMENSCHEIMER,marina FREUDENBERG,Chris GALANOS Max-Planck-Institute for Immunobiology Stiibeweg 51 D-79108 Freiburg i Br Germany Max-Planck-Institute for Immunobiology Stiibeweg 51 D-79108 Freiburg i Br Germany Max-Planck-Institute for Immunobiology Stiibeweg 51 D-79108 Freiburg i Br Germany

目的:本实验研究了以非致死剂量脂多糖(Lipopolysaccharide,LPS)攻击半乳糖葡胺(D-galactosamine,D-GalN)增敏小鼠的死亡是否伴有重要器官的凋亡特征。方法:实验组小鼠以LPS(0.05μg)与D-GalN(20mg)直接攻击,而对照组小鼠仅仅以LPS或D-G... 详细信息

目的:本实验研究了以非致死剂量脂多糖(Lipopolysaccharide,LPS)攻击半乳糖葡胺(D-galactosamine,D-GalN)增敏小鼠的死亡是否伴有重要器官的凋亡特征。方法:实验组小鼠以LPS(0.05μg)与D-GalN(20mg)直接攻击,而对照组小鼠仅仅以LPS或D-GalN,在规定实验时间经乙醚麻醉后,取出脑、肾、心、脾、肺、肝,并立即匀浆和抽提DNA,对所抽提的各器官的DNA以常规琼脂糖凝胶电泳分析是否存在DNA梯度现象;并测定血浆中乳酸脱氢酶和谷氨酸草酰乙酸转移酶,同时将DNA片段化现象与小鼠致死作用的关联性在实验组和对照组间做比较。结果:LPS攻击B-GalN增敏的小鼠4h时,在所检测的器官中,仅仅肝脏可见到凋亡特征DNA片段化现象,至7h时小鼠死亡。而仅用LPS或D-GalN攻击的对照组小鼠,不仅全部存活而且肝脏DNA分子完整。结论:LPS攻击B-GalN增敏的小鼠,肝脏是唯一出现DNA片段化的靶器官,由细菌LPS引发小鼠的死亡,肝脏的损伤可能是关键的原因。

关键词：脂多糖类 D-半乳糖葡胺细胞凋亡 DNA断片

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Direct and noisy transitions in a model shear flow

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Theoretical & Applied Mechanics Letters 2015年第3期5卷 111-116页

作者： marina Pausch Bruno Eckhardt Fachbereich Physik Philipps-Universitat Marburg J.M.Burgerscentrum Delft University of Technology

The transition to turbulence in flows where the laminar profile is linearly stable requires perturbations of finite amplitude. ＂Optimal＂ perturbations are distinguished as extrema of certain functionals, and different functionals give different optima. We here discuss the phase space structure of a 2D simplified model of the transition to turbulence and discuss optimal perturbations with respect to three criteria： energy of the initial condition, energy dissipation of the initial condition, and amplitude of noise in a stochastic transition. We find that the states triggering the transition are different in the three cases, but show the same scaling with Reynolds number.

关键词： Transition to turbulence Shear flows Noise driven Optimal initial conditions

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Epitranscriptomics of cancer

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World Journal of Clinical Oncology 2018年第3期9卷 42-55页

作者： marina Tusup Thomas Kundig Steve Pascolo Department of Dermatology University Hospital of Zürich Faculty of Medicine University of Zurich

The functional impact of modifications of cellular RNAs,including m RNAs,mi RNAs and lnc RNAs,is a field of intense *** role of such modifications in cancer has started to be *** and sometimes opposite effects of RNA modifications have been *** RNA modifications promote,while ot-hers decrease the growth and invasiveness of *** present manuscript reviews the current knowledge on the potential impacts of N6-Methyladenosine,Pse-udouridine,Inosine,2’O-methylation or methylcytidine in cancer’s *** also highlights the remaining qu-estions and provides hints on research avenues and potential therapeutic applications,whereby modulating dynamic RNA modifications may be a new method to treat cancer.

关键词： RNA modifications N6-methyladenosine 5-methylcytidine 2’O-methylation or methylcytidine Pseudouridine Inosine

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Additive manufacturing of high entropy alloys:A practical review

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Journal of Materials Science & Technology 2021年第18期77卷 131-162页

作者： Ahmad Ostovari Moghaddam Nataliya A.Shaburova marina N.Samodurova Amin Abdollahzadeh Evgeny A.Trofimov Department of Materials Science.Physical and Chemical Properties of Materials.South Ural State University 76 Lenin AveChelyabinsk454080Russian Federation Department of Metal Forming South Ural State University76 Lenin AveChelyabinsk.454080Russian Federation Department of Materials Science and Engineering Faculty of EngineeringShahid Chamran University ofAhvazAhvazIran

The novel idea of alloying,which is based on the utilization of multiple principal elements in high concentrations,has created a novel class of promising materials called high entropy alloys(HEAs).So far,several HEAs with outstanding properties beyond those of conventional alloys have been discovered,and new superior high-entropy alloys are still expected to be developed in the ***,the fabrication process of HEAs through conventional manufacturing techniques suffers from significant limitations due to the intrinsic requirements of *** manufacturing(AM),on the other hand,has provided new opportunities for fabricating geometrically complex HEAs with the possibility of in situ tailoring of their microstructure *** the growing interest in AM of HEAs during most recent years,this review article aims at providing the state of the art in AM of *** describes the feedstock requirements for laser based AM ***,a comprehensive picture of the current state of nearly all HEAs processed by laser metal deposition(LMD),selective laser melting(SLM)and selective electron beam melting(SEBM)is *** attention is paid to the features of AM derived microstructures along with their outstanding properties and underlying mechanisms for various material processing *** AM of interstitial solute hardening HEAs,HEA matrix composites as well as non-beam based AM of HEAs will also be *** post-AM treatments and the strategies to fabricate defect-free HEAs are ***,a conclusion of current state and future prospects of additive manufacturing of HEAs will be presented.

关键词： High entropy alloys Additive manufacturing Microstructure Mechanical properties

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Gastroesophageal reflux disease in pediatric esophageal atresia:Assessment of clinical symptoms and pH-impedance data

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World Journal of Clinical Pediatrics 2020年第2期9卷 29-43页

作者： marina Aksionchyk Kirill Marakhouski Aliaksandr Svirsky Department of Pediatric Gastroenterology Diagnostic DivisionRepublican Scientific and Practical Center for Pediatric SurgeryMinsk 220013Belarus Department of Endoscopy Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Department of Pediatric surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus

BACKGROUND Esophageal atresia(EA)is the most common congenital anomaly of the gastrointestinal *** reflux disease(GERD)is a frequent and lifelong problem in these *** can be asymptomatic and the incidence of esophageal gastric and intestinal metaplasia(Barrett’s esophagus)is increased in adults with EA compared with the general *** and accurate diagnosis of GERD is important to reduce long-term problems and this may be achieved by pH-impedance *** To assess symptoms and pH-impedance data in children after EA,in order to identify their specific features of *** This study was conducted from November 2017 to February 2020 and involved 37 children who had undergone EA via open surgical repair(51.35%boys,48.65%girls;age range:1-14 years,median:4.99 years).GERD diagnosis was made based on multichannel intraluminal impedance/pH study and two groups were established:EA without GERD,n=17;EA with GERD,n=20.A control group was established with 66 children with proven GERD(68.18%boys,31.82%girls;median age:7.21 years),composed of a nonerosive reflux disease(referred to as NERD)group(n=41)and a reflux esophagitis group(n=25).Upper gastrointestinal endoscopy with a mucosal esophageal biopsy was performed on all *** The most frequently observed symptom in EA patients with GERD and without GERD was cough(70%and 76.5%respectively).The number of patients with positive symptom association probability in the EA groups was significantly larger in the EA without GERD group(P=0.03).In the control reflux esophagitis group,prevalence of gastrointestinal symptoms was significantly higher than in the NERD group(P=0.017).For both EA groups,there was strong correlation with index of proximal events(IPE)and total proximal events(EA with GERD:0.96,P<0.001;EA without GERD:0.97,P<0.001)but level of IPE was significantly lower than in GERD patients without any surgical treatment(P<0.001).Data on distal mean nocturnal baseline i

关键词： Esophageal atresia Gastroesophageal reflux disease pH-impedance testing Mean nocturnal baseline impedance Proximal reflux Reflux esophagitis Nonerosive reflux disease Pediatric

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The role of information and communication technologies in a country’s GDP:A comparative analysis between developed and developing economies

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Economic and Political Studies 2022年第1期10卷 44-59页

作者： Ariadna Aleksandrova marina D.Khabib Graduate School of Industrial Economics Peter the Great St.Petersburg Polytechnic UniversitySt.PetersburgRussia Department of Statistics State University of Management(SUM)MoscowRussia

The accelerating diffusion of information and communication technologies(ICTs)opens up increasing interactions between nations and between social groups at all development *** purpose of this study is to assess the impact of ICTs on the gross domestic product(GDP)of countries at different development *** investigation of this study shows that in developing nations,the growth of the ICT sector is mostly consumer-oriented and focussed on the provision of electronic services for ultimate cus*** the contrary,in developed countries,it concentrates on the expansion of digitalisation with increasing socio-economic *** developing nations,the ICT sector’s contribution to the GDP is unlikely to increase.A few exceptions are China,India,Malaysia,and Serbia,which are among the top ten leading economies in terms of the growth of the ICT *** general,the role of ICTs in the GDP largely depends on the production structure,level of economic development,and employment *** results of this study can be useful for countries’strategic development in ICTs and for improving their digital indicators in the future.

关键词： Information and communication technologies(ICTs) digital economy economic growth digitalisation innovative development

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A Comparative Study on the Role of Cytokinins in Caryopsis Development in the Maize miniature1 Seed Mutant and Its Wild Type

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Journal of Integrative Plant Biology 2009年第9期51卷 840-849页

作者： Tomaz Rijavec Maja Kova Ale Kladnik Prem S.Chourey marina Dermastia National Institute of Biology Department of Biotechnology and Systems Biology Department of Biology Biotechnical FacultyUniversity of Ljubljana US Department of Agriculture Agricultural Research ServiceChemistry Research Unit

We report here on a comparative developmental profile of plant hormone cytokinins in relation to cell size, cell number and endoreduplicaUon in developing maize caryopsis of a cell wall invertase-deficient miniature1 （mn1） seed mutant and its wild type, Mn1, genotype. Both genotypes showed extremely high levels of total cytokinins during the very early stages of development, followed by a marked and genotype specific reduction. While the decrease of cytokinins in Mn1 was associated with their deactivation by 9-glucosylation, the absolute and the relative part of active cytokinin forms was higher in the mutant. During the exponential growth phase of endosperm between 6 d after pollination and 9 d after pollination, the mean cell doubling time, the absolute growth rate and the level of endoreduplication were similar in the two genotypes. However, the entire duration of growth was longer in Mnl compared with mnl, resulting in a significantly higher cell number in the Mnl endosperm. These data correlate with the previously reported peak levels of the Mn1-encoded cell wall invertase-2 （INCW2） at 12 d after pollination in the Mn1 endosperm. A model showing possible crosstalk among cytokinins, cell cycle and cell wall invertase as causal to increased cell number and sink strength of the Mn1 developing endosperm is discussed.

关键词： 9-glucosylation cell wall invertase cytokinins maize caryopsis miniature1.

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Territorial Accessibility and Decision-Making Structure Related to Debris Flow Impacts on Roads in the French Alps

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International Journal of Disaster Risk Science 2016年第2期7卷 186-197页

作者： marina Utasse Vincent Jomelli Delphine Grancher Frederic Leone Daniel Brunstein Clement Virmoux UMR LGP:Laboratoire de Géographie Physique Université Paris 1 Panthéon-Sorbonne/8591 CNRS UMR GRED:Gouvernance Risque EnvironnementDéveloppement Université Montpellier/IRD

The Alps are highly impacted by debris flows that cause major problems for companies and transport networks located in the valley bottoms. One such event occurred in the Rif Blanc catchment and affected the road network in the French Alps, as well as adjacent areas across the Italian border, for several days in June 2012. This article presents two independent approaches to vulnerability assessment. Based on investigations conducted during a survey of local authorities following the event, we compared theoretical risk management and real crisis management in terms of decision making and modes of intervention. Functional vulnerability and territorial consequences were analyzed using a best travel time model of accessibility. We show that a bottom-up approach is practiced in case of actual management planning with a central coordination of general council. Conversely theoretical crisis management shows prefect as the key actor supported by several other state institutions. Our analysis also revealed that a debris flow event with a local impact on the road network has territorial consequences at a regional scale. This study contributes to the discussion about how to minimize the vulnerability of alpine transport networks prone to debris flows. Our results could serve as a decision support tool for public authorities.

关键词： Crisis management Debris flows French Alps Road network vulnerability

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Utility of routine blood tests after elective laparoscopic cholecystectomy for symptomatic gallstones

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World Journal of Gastrointestinal Surgery 2017年第6期9卷 149-152页

作者： Offir Ben-Ishay marina Zeltser Yoram Kluger Surgical Oncology Pancreatic and Hepatobiliary Surgery ServiceDepartment of General SurgeryDivision of SurgeryRambam Health Care CampusHaifa 35254Israel

AIM To evaluate the value of blood testing after elective laparoscopic cholecystectomy and its association with procedure related *** Charts of all patients undergoing elective laparoscopic cholecystectomy from January 2013 through December2014 were reviewed retrospectively for demographics,indication for surgery,operative course and *** our institution the decision to perform postoperative blood analysis is left for the discretion of the surgeon,therefore we had the possibility to compare the results of those who had blood analyses results to those who did *** was performed to identify variables associated with the decision to perform postoperative blood *** a univariate and multivariate analyses was performed comparing the two *** subgroup analysis was performed to identify factors associated with procedure related *** Five hundred and thirty-two elective laparoscopic cholecystectomies for symptomatic gallstones were performed during the study ***-four percent of the patients(n=340)had blood tests taken post *** that had laboratory tests taken were older(P=0.006,OR=1.01),had longer surgery(P<0.001,OR=3.22)had more drains placed(P<0.001,OR=3.2)and stayed longer in the hospital(P<0.001,OR=1.2).A subgroup analysis of the patients who experienced complications revealed longer stay in the hospital(P<0.001),higher body mass index(BMI)(P=0.04,OR=1.08),increased rates of drain placement(P=0.006,OR=3.1)and higher conversion rates(P=0.01,OR=14.6).Postoperative blood tests withdrawals were not associated with complications(P=0.44).On Multivariate analysis BMI and drain placement were independently associated with *** The current study indicate that routine postoperative blood tests after elective laparoscopic cholecystectomy for symptomatic gallstones does not predict complications and may have an added benefit in diagnosis and management of cases w

关键词： Cholecystectomy Blood tests Laparoscopy Complications Post-operative Gallstones symptomatic

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