检索结果-南通市图书馆

Proapoptotic RECS1: a requisite gateway to lysosomal dysfunction and death

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2022年第12期17卷 2695-2696页

作者： Philippe Pihán Mateus Milani claudio Hetz Biomedical Neuroscience Institute Faculty of MedicineUniversity of ChileSantiagoChile Center for Geroscience Brain Health and Metabolism(GERO)SantiagoChile Program of Cellular and Molecular Biology Institute of Biomedical SciencesUniversity of ChileSantiagoChile Buck Institute for Research on Aging NovatoCAUSA

For a long time since their discovery by Christian de Duve in the 1950s,lysosomes have been referred to almost exclusively as passive garbage bags;the endpoint in the degradation of intra-and extracellular *** catabolic function of lysosomes is accomplished by an array of more than 60 acid hydrolases,which together break down a wide variety of biological macromolecules,including proteins,lipids,carbohydrates,and nucleic acids,for reutilization in the metabolic processes of the *** their optimal function,these enzymes require an acidic intraluminal pH of~4.5,which is maintained by the joint action of a proton pump,the vacuolar H+-ATPase,and several ion channels embedded in the lysosomal limiting membrane.

关键词： maintained limiting function

Large-scale photonic natural language processing

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第12期10卷 2846-2853页

作者： CARLO M.VALENSISE IVANA GRECCO DAVIDE PIERANGELI claudio C Enrico Fermi Research Center(CREF) 00184 RomeItaly Physics Department Sapienza University of Rome00185 RomeItaly Institute for Complex Systems National Research Council(ISC-CNR)00185 RomeItaly

Modern machine-learning applications require huge artificial networks demanding computational power and ***-based platforms promise ultrafast and energy-efficient hardware,which may help realize nextgeneration data processing ***,current photonic networks are limited by the number of inputoutput nodes that can be processed in a single *** restricted network capacity prevents their application to relevant large-scale problems such as natural language ***,we realize a photonic processor for supervised learning with a capacity exceeding 1.5×10^(10)optical nodes,more than one order of magnitude larger than any previous implementation,which enables photonic large-scale text encoding and *** exploiting the full three-dimensional structure of the optical field propagating in free space,we overcome the interpolation threshold and reach the over-parameterized region of machine learning,a condition that allows high-performance sentiment analysis with a minimal fraction of training *** results provide a novel solution to scale up light-driven computing and open the route to photonic natural language processing.

关键词： demanding overcome exceeding

Dual role of brain-derived extracellular vesicles in dementia-related neurodegenerative disorders: cargo of disease spreading signals and diagnostic-therapeutic molecules

在线全文

学校读者我要写书评

暂无评论

Translational Neurodegeneration 2022年第1期11卷 161-177页

作者： Francesca Natale Salvatore Fusco claudio Grassi Department of Neuroscience UniversitàCattolica del Sacro Cuore00168 RomeItaly Fondazione Policlinico Universitario A.Gemelli IRCCS 00168 RomeItaly.

Neurodegenerative disorders are one of the most common causes of disability and represent 6.3%of the global burden of *** them,Alzheimer’s,Parkinson’s,and Huntington’s diseases cause cognitive decline,representing the most disabling symptom on both personal and social *** molecular mechanisms underlying the onset and progression of dementia are still poorly understood,and include secretory factors potentially affecting differentiated neurons,glial cells and neural stem cell *** the last decade,much attention has been devoted to exosomes as novel carriers of information exchanged among both neighbouring and distant *** vesicles can be generated and internalized by different brain cells including neurons,neural stem cells,astrocytes,and microglia,thereby affecting neural plasticity and cognitive functions in physiological and pathological ***,we review data on the roles of exosomes as carriers of bioactive molecules potentially involved in the pathogenesis of neurodegenerative disorders and detectable in biological fluids as biomarkers of *** also discuss the experimental evidence of the therapeutic potential of stem cell-derived vesicles in experimental models of neurodegeneration-dependent cognitive decline.

关键词： Extracellular vesicles Neurodegenerative diseases Stem cells Biomarkers Cognitive decline

On the fractional doubly parabolic Keller-Segel system modelling chemotaxis

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

Science China Mathematics 2022年第9期65卷 1827-1874页

作者： Mario Bezerra claudio Cuevas Clessius Silva Herme Soto Department of Mathematics Federal University of PernambucoRecife 50540-740Brazil Department of Mathematics Rural Federal University of PernambucoRecife 52171-900Brazil Department of Mathematics and Statistics University of La FronteraTemucoCasilla 54-DChile

This work is concerned with the time-fractional doubly parabolic Keller-Segel system in R^(N)(N≥1),and we derive some refined results on the large time behavior of solutions which are presupposed to enjoy some uniform boundedness ***,the well-posedness and the asymptotic stability of solutions in Marcinkiewicz spaces are *** results are achieved by means of an appropriate estimation of the system nonlinearity in the course of an analysis based on Duhamel-type representation formulae and the Kato-Fujita framework which consists in constructing a fixed-point argument by using a suitable time-dependent space.

关键词： chemotaxis aggregation Keller-Segel model decay properties asymptotic profiles global solutions

MUF Resins Improved by Citric Acid as Adhesives for Wood Veneer Panels

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2023年第2期11卷 539-553页

作者： claudio Del Menezzi Antonio Pizzi Siham Amirou Xuedong Xi Department of Forestry Engineering Faculty of TechnologyUniversity of BrasiliaBrasíliaBrazil LERMAB University of LorraineNancyFrance SeniorPost-Doctoral Internship LERMAB-ENSTIBUniversity of LorraineEpinalFrance Yunnan Key Laboratory of Wood Adhesives and Glue Products College of Material Science and EngineeringSouthwest Forestry UniversityKunmingChina International Joint Research Center for Biomass Materials Southwest Forestry UniversityKunmingChina

This article presents the first applied results of using citric acid in combinations with a melamine-urea-formal-dehyde(MUF)resin for bonding wood *** chemical reactions involved are shown based on a MALDI ToF analysis of the reaction of the MUF resin with citric *** preliminary results of the physical and mechanical properties of the LVL prepared are also *** from Populus sp were used to manufacture 5-layer laminated veneer lumber(LVL)of small *** combinations of the amount of citric acid,MUF spread rate and pressing parameters were *** bonded with 20%of citric acid+100 g/m^(2)of MUF,hot-pressed using a 3-step process with maximum 1.5 MPa of pressure yielded the board with better dimensional stability and mechanical *** could be concluded that citric acid in combination with MUF can be used for bonding wood veneer and the research should be continued to study further the parameters involved and to enhance the results.

关键词： LVL wood adhesives citric acid MUF resins MALDI ToF mechanical performance

New insights for the catalytic oxidation of cyclohexane to K-A oil

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

Journal of Energy Chemistry 2022年第7期31卷 45-51,I0002页

作者： Alessandro Vomeri Marta Stucchi Alberto Villa claudio Evangelisti rea Beck Laura Prati Dipartimento di Chimica Universitàdegli Studi di MilanoVia Golgi 1920133MilanoItaly CNR-ICCOM-Istituto di Chimica dei Composti Organo Metallici Via G.Moruzzi 1I-56124 PisaItaly Centre for Energy Research Surface Chemistry and Catalysis DepartmentP.O.Box 49H-1525 BudapestHungary

Au-based catalysts have been reported to be active in the cyclohexane oxidation to K-A oil, but they showed some limitiations in terms of productivity, selectivity and required reaction conditions. The possibility to overcome some of these limits has been explored coupling Au with Cu, which can be suitable for undergoing the electron-switch in the initial step of the cyclohexane oxidation. Hence, a bimetallic 2 wt% Au Cu/Al_(2)O_(3) catalyst was tested in the oxidation of cyclohexane, working at mild conditions of 120 ℃ and 4 bar of O_(2). The combination of the catalyst with a very small amount of benzaldehyde used as cheaper and non-toxic radical initiator allowed to obtain a very high productivity of cyclohexanol and cyclohexanone(45 mmol*m L/mgmet*h) with a selectivity of 94%. Moreover, comparing the catalysed reaction with the non-catalysed one, the role of the catalyst has been disclosed.

关键词： K-A oil Cyclohexane oxidation Benzaldehyde Radical initiator Heterogeneous catalysis Radical mechanism AuCu bimetallic catalyst

Psychophysics in the ophthalmological practice—*** acuity

在线全文

学校读者我要写书评

暂无评论

Annals of Eye Science 2022年第4期7卷 50-64页

作者： Carlo Aleci claudio Rosa Department of Ophthalmology University of TurinMolinette HospitalTurinItaly

Perception is the ability to see,hear,or become aware of external stimuli through the *** stimuli are electromagnetic waves that interact with the eye and elicit a ***,indeed,imply the detection,resolution,and recognition of objects and images,and their accuracy depends on the integrity of the visual *** clinical practice,evaluating the integrity of the visual system relies greatly on the assessment of visual acuity,that is to say on the capacity to identify a *** acuity,indeed,is of utmost importance for diagnosing and monitoring ophthalmological *** acuity is a function that detects the presence of a stimulation(a signal)and resolves its detail(s).This is the case of a symbol like“E”:the stimulus is detected,then it is resolved as three horizontal bars and a vertical *** fact,within the clinical setting visual acuity is usually measured with alphanumeric symbols and is a three-step process that involves not only detection and resolution,but,due to the semantic content of letters and numbers,their *** with subjective(psychophysical)procedures,objective methods that do not require the active participation of the observer have been proposed to estimate visual acuity in non-collaborating subjects,malingerers,or *** paper aims to explain the psychophysical rationale underlying the measurement of visual acuity and revise the most common procedures used for its assessment.

关键词： Visual acuity(VA) Landolt ETDRS preferential looking Oktotype

Concerns about the application of resistance exercise with blood-flow restriction and thrombosis risk in hemodialysis patients

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

Journal of Sport and Health Science 2024年第4期13卷 548-558,F0003页

作者： Hugo de Luca Correa Lysleine Alves Deus Dahan da Cunha Nascimento Nicholas Rolnick Rodrigo Vanerson Passos Neves Andrea Lucena Reis Thais Branquinho de Araujo Carmen Tzanno-Martins Fernanda Silveira Tavares Luiz Sinesio Silva Neto claudio Avelino Rodrigues Santos Paolo Lucas Rodrigues-Silva Fernando Honorato Souza Vitoria Marra da Motta Vilalva Mestrinho Rafael Lavarini dos Santos Rosangela Vieira Andrade Jonato Prestes Thiago dos Santos Rosa Post-graduate Program of Physical Education Catholic University of BrasıliaBrasılia 71966-700Brazil The Human Performance Mechanic Lehman CollegeNew YorkNY 10011USA Clinical Group Home Dialysis Center and RenalClass Sao Paulo 01239-040Brazil Department of Medicine Catholic University of BrasıliaBrasılia 71966-700Brazil Faculty of Medicine Federal University of TocantinsTocantins 77001-090Brazil Embrapa Genetic Resources and Biotechnology Brasılia 70770-917Brazil Graduate Program of Genomic Sciences and Biotechnology Brasılia 71966-700Brazil

Background:Hemodialysis(HD) per se is a risk factor for *** the growing body of evidence on blood-flow restriction(BFR) exercise in HD patients,identification of possible risk factors related to the prothrombotic agent D-dimer is required for the safety and feasibility of this training *** aim of the present study was to identify risk factors associated with higher D-dimer levels and to determine the acute effect of resistance exercise(RE) with BFR on this ***:Two hundred and six HD patients volunteered for this study(all with a glomerular filtration rate of 70 years old),and HD ***,RE+BFR significantly increases D-dimer after 4 *** with borderline baseline D-dimer levels(400-490 ng/mL) displayed increased risk of elevating D-dimer over the normal range(≥500 ng/mL).Conclusion:These results identified factors associated with a heightened prothrombotic state and may assist in the screening process for HD patients who wish to undergo RE+BFR.D-dimer and/or other fibrinolysis factors should be assessed at baseline and throughout the protocol as a precautionary measure to maximize safety during RE+BFR.

关键词： Blood-flow restriction Chronic kidney disease Coagulation Hemodialysis Vascular occlusion exercises

Biosensing with free space whispering gallery mode microlasers

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2023年第5期11卷 732-741页

作者： ANGELA CAPOCEFALO SILVIA GENTILINI LORENZO BAROLO PAOLA BAIOCCO claudio CONTI NEDA GHOFRANIHA Istituto dei Sistemi Complessi-CNR UOS UniversitàLa SapienzaI-00185 RomeItaly Dipartimento di Scienze Biochimiche A.Rossi Fanelli UniversitàLa SapienzaI-00185 RomeItaly Dipartimento di Fisica UniversitàLa SapienzaI-00185 RomeItaly

Highly accurate biosensors for few or single molecule detection play a central role in numerous key fields,such as healthcare and environmental *** the last decade,laser biosensors have been investigated as proofs of concept,and several technologies have been *** here propose a demonstration of polymeric whispering gallery microlasers as biosensors for detecting small amounts of proteins,down to 400 *** have the advantage of working in free space without any need for waveguiding for input excitation or output signal *** photonic microsensors can be easily patterned on microscope slides and operate in air and *** estimate the limit of detection up to 148 nm/RIU for three different protein *** addition,the sensing ability of passive spherical resonators in the presence of dielectric nanoparticles that mimic proteins is described by massive ab initio numerical simulations.

关键词： passive mode excitation