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Multiple interface coupling on natural tourmaline enables high-efficiency removal of antibiotic:Superior property and mechanism

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Journal of Environmental Sciences 2024年第6期140卷 242-254页

作者： Jingjing Cui Xiangyu liu Feifan Qie Chengzhe Xie Qingdong He Jian liu steven l.suib.wenb. wang College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China Department of Chemistry University of ConnecticutStorrsCT 06269-3060United States

Reasonably designing highly active,environmentally friendly,and cost-effective catalysts for efficient elimination of pollutants from water is desirable but ***,an efficient heterogeneous photo-Fenton catalyst tourmaline(TM)/tungsten oxide(WO_(3-x))(named TW10)containing tungsten/boron/iron(W/B/Fe)synergistic active centers and 90%of cheap natural tourmaline(TM)mineral rich in Fe and B *** TW10 catalyst can quickly activate peroxymonosulfate(PMS)to generate massive active free radicals,which may induce the rapid and efficient degradation of tetracycline(TC).The TW10/PMS/Visible light system can effectively degrade up to 98.7%of tetracycline(TC)in actual waters(***,Yellow River,and Yangtze River water),and the catalytic degradation rates reach 1.65,5.569,and 2.38 times higher than those of TM,WO_(3-x),and commercial P25(Degussa,Germany),*** addition,the catalyst can be recycled and reused multiple *** spin resonance spectroscopy(EPR),X-ray photoelectron spectroscopy(XPS),and liquid chromatograph-mass spectrometer(lC-MS)analyses confirm that the synergistic catalytic effect of W/B/Fe sites on the TW10 catalyst accelerates the electron transfer between Fe(Ⅱ)and Fe(Ⅲ),as well as between W(Ⅴ)and W(Ⅵ),and thus promotes the rapid degradation of *** catalytic reaction mechanism and degradation pathway of TC were *** work provides a feasible route for the design and development of new eco-friendly and efficient catalyst.

关键词： Tourmaline(TM) Fenton-like catalyst Tungsten oxide Peroxymonosulfate Antibiotic

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Generation of millijoule-level sub-5 fs violet laser pulses

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High Power laser Science and Engineering 2024年第2期12卷 33-40页

作者： Xinhua Xie Yi Hung Yunpei Deng Adrian l.Cavalieri Andrius Baltuška steven l.Johnson SwissFEl Paul Scherrer InstituteVilligen PSISwitzerland Photonics Institute Technische Universität WienViennaAustria Institute of Applied Physics University of BernBernSwitzerland Institute for Quantum Electronics Physics DepartmentETH ZurichZurichSwitzerland

We demonstrate the generation,spectral broadening and post-compression of second harmonic pulses using a thin beta barium borate(BBO)crystal on a fused-silica substrate as the nonlinear interaction *** combining second harmonic generation in the BBO crystal with self-phase modulation in the fused-silica substrate,we efficiently generate millijoule-level broadband violet pulses from a single optical *** second harmonic spectrum covers a range from long wave ultraviolet(down to 310 nm)to visible(up to 550 nm)with a bandwidth of 65 ***,we compress the second harmonic beam to a duration of 4.8 fs with a pulse energy of 0.64 mJ(5 fs with a pulse energy of 1.05 mJ)using chirped *** all-solid free-space apparatus is compact,robust and pulse energy scalable,making it highly advantageous for generating intense second harmonic pulses from near-infrared femtosecond lasers in the sub-5 fs regime.

关键词： post-compression second harmonic generation self-phase modulation supercontinuum generation

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Exploring unconventional attributes of red blood cells and their potential applications in biomedicine

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Protein & Cell 2024年第5期15卷 315-330页

作者： Alkmini T.Anastasiadi Vasiliki-Zoi Arvaniti Krystalyn E.Hudson Anastasios G.Kriebardis Constantinos Stathopoulos Angelo D’Alessandro steven l.Spitalnik Vassilis l.Tzounakas Department of Biochemistry School of MedicineUniversity of Patras26504 PatrasGreece Department of Pathology and Cell Biology Columbia University Irving Medical CenterNew York CityNY 10032USA laboratory of Reliability and Quality Control in laboratory Hematology(HemQcR) Department of Biomedical SciencesSchool of Health&Caring SciencesUniversity of West Attica(UniWA)12243 EgaleoGreece Department of Biochemistry and Molecular Genetics University of Colorado Anschutz Medical Campus13001 AuroraCOUSA Present address:Institute for Fundamental Biomedical Research(IFBR) Biomedical Sciences Research Center“Alexander Fleming”Vari11527 AthensGreece

We need to talk about red blood *** cells are defined as cells containing distinct nuclei and other membranous ***,red blood cells(RBCs)lack a nucleus and organelles—perhaps to limit the generation of reactive oxygen species(Zhang et al.,2011)—and are filled with hemoglobin(Hb).This oxygen carrier is limited to the cytosol by the cell membrane and cytoskeleton,which maintain cellular integrity and deformability as RBCs pass through narrow capillaries(Gratzer,1994)to perform their primary function of gas exchange.

关键词： membranous maintain

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Friction and wear performance of polyether ether ketone(PEEK)polymers in three lubrication regimes

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Friction 2024年第4期12卷 670-682页

作者： Davide MASSOCCHI Nora lECIS Marco lATTUADA Davide SCAGlIA steven CHATTERTON Paolo PENNACCHI Department of Mechanical Engineering Politecnico di MilanoMilan 20156Italy Eni SpA Downstream product R&DLombardia 20097Italy Eurobearings S.R.l. Lombardia 29016Italy

This experimental study investigates the friction and wear of three coatings commonly used in industrial applications,particularly in hydrodynamic *** three materials under investigation were Babbitt,polyether ether ketone(PEEK)reinforced with 15%carbon fibers,and PEEK reinforced with 20%carbon *** first polymer material was extruded,while the other was produced by fused deposition modelling(FDM).The materials were subjected to sliding tests in a pin-on-disc configuration,with a steel ball serving as the counter *** tests were conducted at room temperature,with a load of 10 N and under three different lubrication conditions:dry,grease,and *** linear speed was set at 0.3 m/s for the dry and semi-solid lubrication tests,while for the oil tests,the speed was set at 0.25 m/*** greases used had consistency grades of NGlI 000 and NGlI *** ISO VG 68 circulation oil was used for the oil lubrication ***,thermodynamic analyses were performed under the most severe conditions(i.e.,dry)to investigate the steel-Babbitt and steel-PEEK contact.

关键词： hydrodynamic bearings polyether ether ketone(PEEK)polymers additive manufacturing grease lubrication sliding oil lubrication ball-on-disk tribology

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Fe doped aluminoborate PKU-1 catalysts for the ketalization of glycerol to solketal: Unveiling the effects of iron composition and boron

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Chinese Chemical letters 2022年第3期33卷 1346-1352页

作者： Weilu wang Xiangke Zeng Yanliu Dang Ping Ouyang Haidong Zhang Guangming Jiang Fan Dong Tao Yang steven l.suib Yang He Engineering Research Center for Waste Oil Recovery Technology and Equipment Ministry of EducationChongqing Technology and Business UniversityChongqing 400067China Institute of Materials Science University of ConnecticutStorrsCT 06269United States Yangtze Delta Region Institute(Huzhou)&Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaHuzhou 313001China College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China Department of Chemical Biological and Materials EngineeringUniversity of South FloridaTampaFL 33620United States

An inexpensive Fe doped aluminoborate consisted of 18% Fe in PKU-1 material that exhibits high selectivity of 4-hydroxymethy-2,2-dimethyl^(-1),3-dioxolane (Solketal, 98.3%), considerable activity (TOF 51.7 h-1), and recyclable ability in the ketalization of glycerol to Solketal with acetone at 318 K has been developed. Our study demonstrated that the structure of Fe (less agglomerated iron species vs. FeO clusters) can be tuned by changing Fe loading in the PKU-1 material, which correlated well with experimental observations. Furthermore, the surface boron sites were promoted by iron loading and behaved as lewis-acid sites to facilitate the reaction process of glycerol ketalization, while the Solketal selectivity was closely related with the structure of iron species in PKU-1, which was proved by kinetic studies, density function theory (DFT) calculations, and a series of spectroscopy studies. This investigation demonstrates that the surface B sites can play important roles in the reaction instead of being spectators.

关键词： Fe doping aluminoborate Glycerol recycling Ketalization Boron reaction sites lewis-acid dominating catalyst

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Associations of accelerometry-measured and self-reported physical activity and sedentary behavior with skeletal muscle energetics:The Study of Muscle,Mobility and Aging(SOMMA)

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Journal of Sport and Health Science 2024年第5期13卷 621-630页

作者： Yujia(Susanna)Qiao Terri l.Blackwell Peggy M.Cawthon Paul M.Coen steven R.Cummings Giovanna Distefano Samaneh Farsijani Daniel E.Forman Bret H.Goodpaster Stephen B.Kritchevsky Theresa Mau Frederico G.S.Toledo Anne B.Newman Nancy W.Glynn Department of Epidemiology School of Public HealthUniversity of PittsburghPittsburghPA 15261USA San Francisco Coordinating Center California Pacific Medical Center Research InstituteSan FranciscoCA 94143USA Department of Epidemiology and Biostatistics University of CaliforniaSan FranciscoCA 94143USA Translational Research Institute AdventHealthOrlandoFL 32804USA Department of Medicine(Geriatrics and Cardiology) University of Pittsburghand GeriatricsResearchEducationand Clinical Center(GRECC)VA Pittsburgh Healthcare SystemPittsburghPA 15261USA Department of Internal Medicine Section on Gerontology and Geriatric MedicineWake Forest School of MedicineWinston-SalemNC 27109USA Division of Endocrinology and Metabolism Department of MedicineUniversity of PittsburghPittsburghPA 15261USA

Background:Skeletal muscle energetics decline with age,and physical activity(PA)has been shown to offset these declines in older ***,many studies reporting these effects were based on self-reported PA or structured exercise ***,we examined the associations of accelerometry-measured and self-reported PA and sedentary behavior(SB)with skeletal muscle energetics and explored the extent to which PA and sedentary behavior would attenuate the associations of age with muscle ***:As part of the Study of Muscle,Mobility and Aging,enrolled older adults(n=879),810(age=76.4±5.0 years old,mean±SD;58%women)had maximal muscle oxidative capacity measured ex vivo via high-resolution re spirometry of permeabilized myofibers(maximal oxidative phosphorylation(maxOXPHOS))and in vivo by ^(31)phosphorus magnetic resonance spectroscopy(maximal adenosine triphosphate(ATP_(max))).Accelerometry-measured sedentary behavior,light activity,and moderate-to-vigorous PA(MVPA)were assessed using a wrist-worn ActiGraph GT9X over 7 ***-reported sedentary behavior,MVPA,and all PA were assessed with the Community Healthy Activities Model Program for Seniors(CHAMPS)*** regression models with progressive covariate adjustments evaluated the associations of sedentary behavior and PA with muscle energetics,as well as the attenuation of the age/muscle energetics association by MVP A and sedentary *** a sensitivity analysis,we also examined activPAl-measured daily step count and time spent in sedentary behavior and their associations with muscle ***:Every 30 min/day more of ActiGraph-measured MVPA was associated with 0.65 pmol/(s×mg)higher maxOXPHOS and 0.012 mM/s higher ATP_(max)after adjusting for age,site/technician,and sex(plight activity was not associated with maxOXPHOS or ATP_(max).Meanwhile,every 30 min/day spent in ActiGraph-measured sedentary behavior was associated with 0.39 pmol/s×mg lower maxOXPHOS and0.

关键词： Aging Exercise Mitochondria

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Safety and in Vivo Anti-Inflammatory Activity of Ethanolic Extract of Ficus umbellata (Vahl.) leaves

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Journal of Biosciences and Medicines 2024年第3期12卷 94-112页

作者： Atchadé Pascal Tchogou steven Amour Pyus Tanguy Vignon Chokki Gbèssohèlè Justin Behanzin Tétédé Rodrigue Christian Konfo Perside Savoeda Félicienne Agbogba léocardie Akpoli lamine Baba-Moussa Maximin Senou Alphonse Sezan Experimental and Clinical Biology Unit (UBEC) Biotechnology Research Laboratory Medical and Pharmaceutical (LaRBiMeP) Na-tional School of Biosciences and Biotechnology of Dassa-Zoumé (ENSBBA) National University of Science Technology and Engi-neering of Abomey (UNSTIM) Dassa-Zoumé Benin laboratory of Pharmacology and Improved Traditional Medicines (lPMTA) Faculty of Science and Technology (FAST) University of Abomey-Calavi (UAC) Abomey-Calavi Benin National University of Agriculture (UNA) Schools of Science and Techniques for Preservation and Processing of Agricultural Prod-ucts (ESTCTPA) Sakété Benin laboratory of Biology and Molecular Typing in Microbiology Department of Biochemistry and Cell Biology Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin

Toxicity is the totality of adverse effects, which can be functional and morphological lesions in a living organism, caused by a substance introduced in relatively high single doses or in small, repeated doses. The aim of this study was to assess the OECD-recommended acute oral toxicity and anti-inflammatory activity of ethanolic extract of Ficus umbellata leaves. Animals were given a single oral dose of 1000, 3000 and 5000 mg/Kg body weight (BW) of the extract. For the anti-inflammatory activity test, rats were given the ethanolic extract of F. umbellata leaves at doses of 100, 300 and 500 mg/Kg or aspirin® at a concentration of 100 mg/Kg PC orally, one hour before injection of 0.05 ml of 1% formalin under the plantar fascia of the rat’s right hind paw. Paw volume measurements were taken one, two and three hours after formalin injection, using an electronic caliper. After 14 days of observation, no deaths were observed in treated rats. The lD50 of ethanolic extract of Ficus umbellata leaf powder is greater than 5000 mg/Kg body weight. This extract has no significant effects on hematological parameters and on the main markers of nephrotoxicity and hepatotoxicity for a single dose of less than 5000 mg/Kg PC. It reduces formalin-induced edema. Evaluation of the percentage inhibition showed that the extract had greater anti-inflammatory activity at 3 hours after the start of the experiment. However, better inhibition of inflammatory oedema of the paw of rats treated with 500 mg/Kg was observed at 5 hours after the start of the experiment, with a percentage inhibition of 69.23 ± 1.02, compared with the reference group treated with aspirin® 100 mg/Kg, which showed an inhibition of 63.50 ± 0.98. These results show that F. umbellata leaves possess anti-inflammatory activity, which would justify their use in traditional African medicine to prevent or treat inflammation.

关键词： Ficus umbellata Toxicity Anti-Inflammatory Edema Inflammation

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Deep Rank-Based Average Pooling Network for Covid-19 Recognition

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Computers, Materials & Continua 2022年第2期70卷 2797-2813页

作者： Shui-Hua wang Muhammad Attique Khan Vishnuvarthanan Govindaraj steven l.Fernandes Ziquan Zhu Yu-Dong Zhang School of Mathematics and Actuarial Science University of LeicesterLE17RHUK Department of Computer Science HITEC University TaxilaTaxilaPakistan Department of Biomedical Engineering Kalasalingam Academy of Research and Education626126Tamil NaduIndia Department of Computer Science Design&JournalismCreighton UniversityOmahaNebraskaUSA Science in Civil Engineering University of FloridaGainesvilleFloridaFL 32608USA School of Informatics University of LeicesterUK

(Aim)To make a more accurate and precise COVID-19 diagnosis system,this study proposed a novel deep rank-based average pooling network(DRAPNet)model,i.e.,deep rank-based average pooling network,for COVID-19 recognition.(Methods)521 subjects yield 1164 slice images via the slice level selection *** the 1164 slice images comprise four categories:COVID-19 positive;community-acquired pneumonia;second pulmonary tuberculosis;and healthy *** method firstly introduced an improved multiple-way data ***,an n-conv rankbased average pooling module(NRAPM)was proposed in which rank-based pooling—particularly,rank-based average pooling(RAP)—was employed to avoid ***,a novel DRAPNet was proposed based on NRAPM and inspired by the ***-CAM was used to generate heatmaps and gave our AI model an explainable analysis.(Results)Our DRAPNet achieved a micro-averaged F1 score of 95.49%by 10 runs over the test *** sensitivities of the four classes were 95.44%,96.07%,94.41%,and 96.07%,*** precisions of four classes were 96.45%,95.22%,95.05%,and 95.28%,*** F1 scores of the four classes were 95.94%,95.64%,94.73%,and 95.67%,***,the confusion matrix was given.(Conclusions)The DRAPNet is effective in diagnosing COVID-19 and other chest infectious *** RAP gives better results than four other methods:strided convolution,l2-norm pooling,average pooling,and max pooling.

关键词： COVID-19 rank-based average pooling deep learning deep neural network

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Schwann cell extracellular vesicles:judging a book by its cover

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Neural Regeneration Research 2023年第2期18卷 325-326页

作者： steven l.Gonias Wendy M.Campana Department of Pathology University of CaliforniaSan DiegoCAUSA Department of Anesthesiology Program in NeurosciencesUniversity of California The Veterans Administration San Diego Healthcare System San DiegoCAUSA

Schwann cells(SCs)are essential in the development of the peripheral nervous system(PNS),in PNS inj ury,and the aging *** comprise greater than 90%of the nucleated cells in peripheral nerves(Campana,2007).Myelinating SCs insulate large-diameter axons,forming a 1:1relationship and promoting saltatory conduction of axonal action ***-myelinating SCs ensheathe clusters of smaller diameter axons in Remak *** types of SCs provide essential metabolic and trophic support to axons,which is essential for maintaining axon integrity in healthy peripheral nerves.

关键词： nerves conduction Schwann

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A Third Order Accurate in Time,BDF-Type Energy Stable Scheme for the Cahn-Hilliard Equation

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Numerical Mathematics(Theory,Methods and Applications) 2022年第2期15卷 279-303页

作者： Kelong Cheng Cheng wang steven M.Wise Yanmei Wu School of Science Southwest University of Science and TechnologyMianyangSichuan 621010P.R.China Department of Mathematics The University of MassachusettsNorth DartmouthMA 02747USA Department of Mathematics The University of TennesseeKnoxvilleTN 37996USA

In this paper we propose and analyze a backward differentiation formula(BDF)type numerical scheme for the Cahn-Hilliard equation with third order temporal *** Fourier pseudo-spectral method is used to discretize *** surface diffusion and the nonlinear chemical potential terms are treated implicitly,while the expansive term is approximated by a third order explicit extrapolation formula for the sake of *** addition,a third order accurate Douglas-Dupont regularization term,in the form of−A_(0)△t^(2)△_( N)(φ^(n+1)−φ^(n)),is added in the numerical *** particular,the energy stability is carefully derived in a modified version,so that a uniform bound for the original energy functional is available,and a theoretical justification of the coefficient A becomes *** a result of this energy stability analysis,a uniform-in-time l_(N)^(6)bound of the numerical solution is *** also,the optimal rate convergence analysis and error estimate are provided,in the l_(△t)^(∞)(0,T;l_(N)^(2))∩l^(2)_(△ t)(0,T;H_(h)^(2))norm,with the help of the l_(N)^(6)bound for the numerical solution.A few numerical simulation results are presented to demonstrate the efficiency of the numerical scheme and the third order convergence.

关键词： Cahn-Hilliard equation third order backward differentiation formula unique solvability energy stability discrete l6 N estimate optimal rate convergence analysis

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