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Photoelectrochemical Iron-Catalyzed C(sp^(3))-H Borylation of Alkanes in a Position-Selective Manner

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CCS Chemistry 2024年第6期6卷 1430-1438页

作者： Wen Wei Bin Wang Simon L.Homölle Jinbin Zhu Yanjun Li Tristan von Münchow Isaac Maksso Lutz Ackermann Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen37077 Göttingen

Catalytic C-H borylation is of prime topical importance,since easily available feedstock chemicals can thereby be transformed into valuable transient functional groups in the absence of directing ***,we disclose an iron-catalyzed C(sp^(3))-H borylation of simple,non-prefunctionalized alkanes,providing access to value-added products in a single step by means of *** power of merging photo-and electrochemistry was mirrored by ample scope and exceedingly mild reaction ***,an outstanding position-selectivity in favor of primary C(sp^(3))-H proved viable within the photoelectrochemical borylation through a chemo-selective anodic overoxidation *** ferro-photoelectrochemistry strategy avoids toxic precious transition metals,enabling C(sp^(3))-H borylations in a site-selective fashion.

关键词： photoelectrocatalysis C(sp^(3))-H borylation iron catalysis position-selectivity chlorine radical

Low-dimensional quadratic relative character varieties for the projective line minus three points Dedicated to my friend Gang Xiao

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Science China Mathematics 2024年

作者： Carlos Simpson CNRS Laboratoire JA Dieudonne Parc Valrose Université C?te d'Azur

We show that relative character varieties having a fixed dimension d > 0, for irreducible orthogonal or symplectic local systems of rank r on P1-{0, 1, ∞}, are isomorphic via Katz's middle convolution to ones with a ...

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Modelling Anti-Corrosion Coating Performance of Metallic Bipolar Plates for PEM Fuel Cells:A Machine Learning Approach

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Energy and AI

Energy and AI 2024年第3期17卷 495-512页

作者： Pramoth Varsan Madhavan Samaneh Shahgaldi Xianguo Li Mechanical and Mechatronics Engineering University of WaterlooOntarioCanada Hydrogen Research Institute Universitédu QuébecàTrois-RivièresQuebecCanada

Proton exchange membrane(PEM)fuel cells have significant potential for clean power generation,yet challenges remain in enhancing their performance,durability,and cost-effectiveness,particularly concerning metallic bipolar plates,which are pivotal for lightweight compact fuel cell *** coatings are commonly employed to combat metallic bipolar plate corrosion and enhance water management within *** methods for predicting coating performance in terms of corrosion resistance involve complex physical-electrochemical modelling and extensive experimentation,with significant time and *** this study machine learning techniques are employed to model metallic bipolar plate coating performance,diamond-like-carbon coatings of varying thicknesses deposited on SS316L are considered,and coating performance is evaluated using potentiodynamic polarization and electrochemical impedance *** obtained experimental data is split into two datasets for machine learning modelling:one predicting corrosion current density and another predicting impedance *** learning models,including extreme gradient boosting(XGB)and artificial neural networks(ANN),are developed,and optimized to predict coating performance *** preprocessing and hyperparameter tuning are carried out to enhance model *** show that ANN outperforms XGB in predicting corrosion current density,achieving an R2>0.98,and accurately predicting impedance parameters with an R2>0.99,indicating that the models developed are very promising for accurate prediction of the corrosion performance of coated metallic bipolar plates for PEM fuel cells.

关键词： Fuel cell Metallic bipolar plate Coating performance Machine learning Extreme gradient boosting Artificial neural networks

Liver transplantation and liver resection as alternative treatments for primary hepatobiliary and secondary liver tumors: Competitors or allies?

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Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 111-116页

作者： Jan Lerut Institute for Experimental and Clinical Research(IREC) Universitécatholique Louvain(UCL)Avenue Hippocrate 561200 Woluwe Saint PierreBrusselsBelgium

Although Starzl designed in the 1960’s liver transplantation(LT)to treat unresectable primary and also secondary liver tumors,transplantation still occupies a(too)small place in the respective therapeutic algorithms[1].Due to the lack of(any)selection criteria,the concept of transplantation became rapidly challenged because of the prohibitively high incidence of tumor recurrence[1–3].

关键词： liver tumors Liver

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Epoché as the Breakthrough of the Natural Attitude

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Philosophy Study 2024年第3期14卷 138-144页

作者： Maurizio Trudu universitàdegli Studi di Ferrara FerraraItaly Bergische universität Wuppertal WuppertalGermany

The following contribution aims to interpret the methodical device of Husserl’s epochéin light of the concept of *** the epochéis a theoretical device directed towards the suspension of the natural attitude,I will first attempt to define the concept of natural ***,I will seek to understand the rich meaning of the concept of epoché.Finally,I will explore how this element is related to the concept of *** other words,I will endeavour to clarify how the epochédetermines a breakthrough of the natural attitude,which is not to be understood as“annihilation”or“destruction”but as a traversal.

关键词： Edmund Husserl epoché natural attitude phenomenology

Impact of gynecological cancers on women’s mental health

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World Journal of Psychiatry 2024年第9期14卷 1294-1300页

作者： Giuseppe Marano Marianna Mazza Department of Neurosciences Unit of PsychiatryFondazione Policlinico Universitario A Gemelli IRCCSUniversitàCattolica del Sacro CuoreRome 00168Italy

Gynecological cancers and their treatments are associated with both specific and non-specific long-term physiological *** patients face transformations in their lifestyle,body image,role,and social interactions and suffer from physical,psychological,and economic *** mental health of cancer patients is of great importance and requires special attention,as growing evidence demonstrates its influence not only on quality of life but also on treatment *** cancers have peculiar psychological consequences,which are linked to the specificity of the site of the *** should be aware of the importance of protecting the psychophysical health of these patients and the fact that their physical health and quality of life also depend on the quality of their mental *** is possible to structure targeted and effective prevention interventions and treatments to reduce psychological distress and improve the quality of life of subjects living with gynecological cancers.

关键词： Gynecological cancer Psycho-oncology Women Quality of life Psycho-logical distress

Metamorphoses of the university and the Pathways of Indigenous Students in Quebec:Issues of Accessibility to Studies and Academic Persistence from a Perspective of the Decolonization of Education-A Secondary Publication

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Journal of Contemporary Educational Research 2024年第4期8卷 304-315页

作者： Jean-Luc Ratel Annie Pilote Faculty of Education Universitédu QuébecàMontréalCanada Faculty of Education UniversitéLavalCanada

In connection with the historical context of social segregation and the assimilative aim of formal education imposed on them,the Indigenous Peoples of Québec have long been excluded from higher ***,even if their graduation rates are increasing,a persistent gap with the non-Indigenous population is *** data in this article are drawn from 23 interviews with students and university graduates of the First Nations of Québec,as part of a thesis in educational *** paper analyzes how these students manage to combine the contributions of Indigenous education with those of Western education by developing paths that are part of the decolonization movement of *** relationship to Indigenous identity and cultures clearly influences their educational background and is analyzed taking into account power relations with the dominant *** paper emphasizes more particularly the relationship to studies,the adaptation to the student profession,and the balance between studies,work,and family among Indigenous students,in a context of transition from university to multiversity which contributed to the increase of Indigenous university attendance.

关键词： Educational inclusion and exclusion Higher and university education Educational inequalities Canada

Scanning transmission electron microscopy and atom probe tomography analysis of non-stoichiometry long-period-stacking-ordered structures in Mg-Ni-Y/Sm alloys

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Journal of Magnesium and Alloys 2024年第3期12卷 954-965页

作者： Yimeng Chen Manuel Legrée Jean-Louis Bobet Alexander Kvit CAMECA Instruments Inc MadisonWI 53711USA ICMCB Universitéde BordeauxPessacCEDEX 33608France NIAC&Materials Science Department University of WisconsinMadisonWI 53706USA

The long-period-stacking-ordered(LPSO)structure affects the mechanical,corrosion and hydrolysis properties of Mg *** current work employs high angle annular dark field-scanning transmission electron microscopy(HAADF-STEM)and atom probe tomography(APT)to investigate the structural and local chemical information of LPSO phases formed in Mg-Ni-Y/Sm ternary alloys after extended isothermal *** on the alloying elements and their concentrations,Mg-Ni-Y/Sm develops a two-phase LPSO+α-Mg structure in which the LPSO phase contains defects,hybrid LPSO structure,and Mg ***-STEM and APT indicate non-stoichiometric LPSO with incomplete Ni_(6)(Y/Sm)_(8) *** addition,the APT quantitatively determines the local composition of LPSO and confirms the presence of Ni within the Mg bonding *** results provide insight into a better understanding of the structure and hydrolysis properties of LPSO-Mg alloys.

关键词： Magnesium alloys Long-range ordering Atom probe tomography(APT) STEM HAADF Hydrolysis properties.

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Outpatient management of obscure gastrointestinal bleeding:A new perspective in high-risk patients

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World Journal of Gastroenterology 2024年第19期30卷 2502-2504页

作者： Maria Elena Riccioni Clelia Marmo Digestive Endoscopy Unit Fondazione Policlinico Universitario Agostino GemelliIRCCSUniversitàCattolica del Sacro CuoreLargo Agostino GemelliRome 00168Italy CEMAD Centro Malattie Dell’Apparato Digerente Fondazione Policlinico Universitario Agostino GemelliIRCCSUniversitàCattolica del Sacro CuoreLargo Agostino GemelliRome 00168Italy

Mid-gastrointestinal bleeding accounts for approximately 5%-10%of all gastrointestinal bleeding cases,and vascular lesions represent the most frequent *** rebleeding rate for these lesions is quite high(about 42%).We hereby recommend that scheduled outpatient management of these patients could reduce the risk of rebleeding episodes.

关键词： Gastrointestinal bleeding Small bowel bleeding Recurrent bleeding Rebleeding risk Rebleeding Outpatient management