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Yoga and mental health among Brazilian practitioners during COvID-19:An internet-based cross-sectional survey

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Sports Medicine and Health Science 2022年第2期4卷 127-132页

作者： Giovanna Mdos Santos Rozangela verlengia Anna G.S.v.Ribeiro Cinthia A.Correa Melissa Ciuldim alex H.Crisp Post-Graduate Program in Human Movement Sciences Methodist University of Piracicaba-UNIMEPPiracicabaSPBrazil

This study aimed to describe yoga practice and verify its association with depression,anxiety,and stress during the COvID-19 pandemic among Brazilian practitioners.A cross-sectional anonymous online survey was conducted in all regions of Brazil using a snowball sampling strategy among yoga practitioners.A total of 860 participants(87%female,aged:19–82 years)completed the *** data,lifestyle factors,yoga practice during the pandemic,and the Depression Anxiety and Stress Scale(DASS-21)scores were collected between July 9 and July 15,***,9.5%,9.3%,and 5.6%of participants exhibited some traits(mild to severe)of depression,anxiety,and stress,*** yoga(48%)was the most commonly practiced yoga *** the adjusted analysis,a higher yoga experience(>5 years)was associated with better anxiety(odds ratio;bootstrap 95%confidence interval:2.42;1.32,4.49)and stress status(1.80;1.06,3.00)than beginners(vels of depression(odds ratio:2.56–6.49;pver,the maintenance of practice frequency during the pandemic was associated with higher odds of normal levels of depression(2.27;1.39–3.79),anxiety(1.97;1.25–3.10),and stress(1.97;1.32–2.96).In conclusion,our findings indicated that a higher level of yoga practice was associated with better mental health levels during the COvID-19 pandemic.

关键词： Physical activity Mind-body practices Depression Anxiety Stress Coronavirus COvID-19

Hydrogen-rich water exerts anti-tumor effects comparable to 5-fluorouracil in a colorectal cancer xenograft model

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 242-252页

作者： Fereshteh Asgharzadeh alex Tarnava Asma Mostafapour Majid Khazaei Tyler W LeBaron Department of Physiology Faculty of MedicineMashhad University of Medical SciencesMashhad ***Iran Drink HRW New WestminsterBC V3j0b6 Canada Department of Medical Genetics and Molecular Medicine Faculty of MedicineMashhad University of Medical SciencesMashhad ***Iran Centre of Experimental Medicine Institute for Heart Research Slovak Academy of SciencesBratislava 984104Slovakia Department of Kinesiology and Outdoor Recreation Southern Utah UniversityUT 84720United States Biological Research Molecular Hydrogen InstituteUT 84721United States Department of Physical Science Southern Utah UniversityUT 84720United States

BACKGROUND Colorectal cancer(CRC)is the third leading cause of cancer-related deaths in the *** removal remains the preferred frontline treatment;however,effective non-surgical interventions remain a high priority.5-fluorouracil(5-FU)is a widely used chemotherapy agent,and molecular hydrogen(H2)has been recognized for its antioxidant and anti-inflammatory effects,with research also suggesting its potential anti-tumor ***,H2 dissolved in water[hydrogen-rich water(HRW)],with or without 5-FU,may present itself as a novel therapeutic for *** To investigate the effects of HRW,with or without 5-FU,as a novel therapeutic for *** CRC was induced in the left flank of inbred Balb/c mice.A total of 24 mice bearing tumors were randomly divided into four groups(n=6 per group)and treated as follows:(1)Control group;(2)5-FU group that received intraperitoneal injection of 5-FU(5 mg/kg)every other day;(3)H2 group that received HRW,created and delivered via dissolving the H2-generating tablet in the animals’drinking water,with 200μL also delivered by oral gavage;and(4)The combination group,H2(administered in same way as for group three)combined with 5-FU administered same way as group *** Administration of HRW+5-FU significantly improved tumor weight,tumor size,collagen content and fibrosis as compared to the CRC control ***,HRW attenuated oxidative stress(OS)and potentiated antioxidant activity(AA),whereas 5-FU treatment exacerbated OS and blunted *** combination of HRW+5-FU significantly reduced tumor weight and size,as well as reduced collagen deposition and the degree of fibrosis,while further increasing OS and decreasing AA compared to administration of 5-FU *** Administration of HRW,with or without 5-FU,may serve as a therapeutic for treating CRC.

关键词： Colorectal cancer Molecular hydrogen 5-fluorouracil Oxidative stress Antioxidants Inflammation

Free-Standing α-MoO_(3)/Ti_(3)C_(2) MXene Hybrid Electrode in Water-in-Salt Electrolytes

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Energy & Environmental Materials 2023年第4期6卷 6-14页

作者： Mohit Saraf Christopher E.Shuck Nazgol Norouzi Kyle Matthews alex Inman Teng Zhang Ekaterina Pomerantseva Yury Gogotsi A.J.Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel UniversityPhiladelphia PA 19104USA

While transition-metal oxides such as α-MoO_(3)provide high capacity,their use is limited by modest electronic conductivity and electrochemical instability in aqueous ***-dimensional(2D)MXenes,offer metallic conductivity,but their capacitance is limited in aqueous *** of partially solvated cations into Ti_(3)C_(2)MXene from lithium-based water-in-salt(WIS)electrolytes enables charge storage at positive potentials,allowing a wider potential window and higher ***,we demonstrate that α-MoO_(3)/Ti_(3)C_(2)hybrids combine the high capacity of α-MoO_(3)and conductivity of Ti_(3)C_(2)in WIS(19.8 m LiCI)electrolyte in a wide1.8 v voltage *** voltammograms reveal multiple redox peaks from α-MoO_(3)in addition to the well-separated peaks of Ti_(3)C_(2)in the hybrid *** leads to a higher specific charge and a higher rate capability compared to a carbon and binder containing α-MoO_(3)*** results demonstrate that the addition of MXene to less conductive oxides eliminates the need for conductive carbon additives and binders,leads to a larger amount of charge stored,and increases redox capacity at higher *** addition,MXene encapsulated α-MoO_(3)showed improved electrochemical stability,which was attributed to the suppressed dissolution of α-MoO_(3).The work suggests that oxide/MXene hybrids are promising for energy storage.

关键词： free-standing electrode Ti_(3)C_(2)MXene water-in-salt electrolytes α-MoO_(3)nanobelts

Comparison of the vO_(2)Master Pro and Cosmed K5 During Walking,Jogging,and Running

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Journal of Science in Sport and Exercise 2022年第2期4卷 119-127页

作者： alex Toulouse Dustin Joubert Gary Oden Patrick R.Davis Department of Kinesiology Sam Houston State UniversityHuntsvilleTXUSA Department of Kinesiology and Health Science Stephen F.Austin UniversityNacogdochesTXUSA

Aim Portable devices that accurately detect the composition of expired gases and changes in vO_(2)open new possibilities in research methodology and *** The purpose of this study was to compare the oxygen consumption(vO_(2))measurements of the vO_(2)Master Pro(vM)to the Cosmed K5(K5)during walking,jogging,and running in field and lab *** Twelve proficient runners,with a current 10 k pace of≥11.29 km/h,performed 3 matched intervals at 3 different speeds(4.82,8.05,11.29 km/h)on a treadmill and on an outdoor *** airflow test was also performed on both devices by pumping air through the devices using a 3 L syringe timed to a metronome at 15,25,and 35 beats/*** The vM did not report walking data for most *** treadmill running,there were significant differences in vO_(2)(47.86±3.94 vs.29.56±4.15 mL/kg/min),ventilation(v_(e))(71 vs.57 mL/min),and tidal volume(Tv)(1.89 vs.1.56 L)between the K5 and vM respectively(Pvices in vO_(2),v_(e),and Tv(Pvices in v_(e)and Tv(PvM,likely due to differ-ences in Tv measurement.

关键词： Oxygen consumption Energy expenditure Metabolic cart Comparison

Broadband photomultiplication-type polymer photodetectors and its application in light-controlled circuit

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Science China Chemistry 2022年第8期65卷 1642-1649页

作者： Ming Liu Qunping Fan Kaixuan Yang Zijin Zhao Xingchao Zhao Zhengji Zhou Jian Zhang Francis Lin alex K.-Y.Jen Fujun Zhang Key Laboratory of Luminescence and Optical Information Ministry of EducationBeijing Jiaotong UniversityBeijing 100044China Department of Chemistry City University of Hong KongHong Kong 999077China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Key Lab for Special Functional Materials Ministry of EducationNational and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand School of MaterialsHenan UniversityKaifeng 475004China Guangxi Key Laboratory of Information Materials School of Material Science and TechnologyGuilin University of Electronic TechnologyGuilin 541004China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering University of WashingtonWashington 98195-2120United States Hong Kong Institute for Clean Energy City University of Hong KongHong Kong 999077China

Photomultiplication-type polymer photodetectors(PM-PPDs)were achieved with polymer P3HT as donor and PY3Se-1v as acceptor based on structure of ITO/PEDOT:PSS/active layer/*** optimal weight ratio of P3HT to PY3Se-1v is about 100:*** of isolated electron traps are formed with PY3Se-1v surrounded by P3HT due to rather less content of PY3Se-1v in active layers and about 0.94 e v energy offset between the lowest unoccupied molecular orbitals(LUMO)of P3HT and *** optimal PM-PPDs exhibit broad spectral response from 350 to 950 nm and external quantum efficiency(EQE)values of68,200%at 360 nm,26,400%at 630 nm and 19,500%at 850 nm under-15 v *** working mechanism of PM-PPDs is attributed to the interfacial trap-assisted hole tunneling injection from external *** performance of PM-PPDs can be further improved by incorporating appropriate PMBBDT with high hole mobility as the third *** EQE values of optimal ternary PM-PPDs are increased to 105,000%at 360 nm,40,000%at 630 nm and 31,800%at 850 nm under-15 v bias,benefiting from the enhanced hole transport in ternary active *** optimal ternary PM-PPDs were successfully applied in a light-controlled circuit to turn on or turn off light emitting diode(LED).

关键词： polymer photodetectors photomultiplication external quantum efficiency broadband

16.3%Efficiency binary all-polymer solar cells enabled by a novel polymer acceptor with an asymmetrical selenophene-fused backbone

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Science China Chemistry 2022年第2期65卷 309-317页

作者： Huiting Fu Qunping Fan Wei Gao Jiyeon Oh Yuxiang Li Francis Lin Feng Qi Changduk Yang Tobin J.Marks alex K.-Y.Jen Department of Materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina Department of Chemistry City University of Hong KongKowloon 999077Hong KongChina Department of Energy Engineering School of Energy and Chemical EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)50 UNIST-gilUlju-gunUlsan 44919Republic of Korea Department of Materials Science and Engineering University of WashingtonSeattleWashington 98195-2120USA Department of Chemistry and the Materials Research Center Northwestern UniversityEvanstonIL60208USA Institute for Advanced Studies City University of Hong KongKowloon 999077Hong KongChina

Despite the significant progress made recently in all-polymer solar cells(all-PSCs),it is still quite challenging to achieve high open-circuit voltage(v_(oc))and short-circuit current density(J_(sc))simultaneously in order to further improve their *** recent strategy of using selenophene to replace thiophene on the Y6 based polymer acceptors has resulted in significantly improved J_(sc)s of the resulting ***,such modifications have also depressed v_(oc),which compromises the overall performance of the ***,we present the design and synthesis of a novel polymer acceptor,PYT-1S1Se,created by inserting an asymmetrical selenophene-fused framework to precisely manipulate optical absorption and electronic *** with the selenium-free analog,PYT-2S,and symmetrical selenium-fused analog,PYT-2Se,the PYT-1S1Se derived all-PSCs not only deliver optimized J_(sc)(24.1 mA cm^(−2))and v_(oc)(0.926 v)metrics,but also exhibit a relatively low energy loss of 0.502 ***,these devices obtain a record-high power conversion efficiency(PCE)of 16.3%in binary *** work demonstrates an effective molecular design strategy for balancing the trade-off between v_(oc) and J_(sc) to achieve highefficiency all-PSCs.

关键词： all-polymer solar cells polymer acceptors asymmetrical selenophene-fused backbone power conversion efficiencies stability

Re-evaluating monazite as a record of metamorphic reactions

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Geoscience Frontiers 2022年第2期13卷 237-254页

作者： Kyle P.Larson Sudip Shrestha John M.Cottle Carl Guilmette T.alex Johnson H.Daniel Gibson Félix Gervais Department of Earth Environmental and Geographic SciencesUniversity of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Fipke Laboratory for Trace Element Research University of British Columbia Okanagan3247 University WayKelownaBC V1V 1V7Canada Department of Earth Science University of CaliforniaSanta BarbaraSanta BarbaraCA 93106-9630USA Géologie et Génie Géologique UniversitéLavalQuébec CityQuebecCanada Department of Earth Sciences Simon Fraser University8888 University DriveBurnabyBC V5A 1S6Canada Départment des Génies Civil Géologique et des MinesPolytechnique MontréalMontréalQC H3T 1J4Canada

This study presents a re-examination of historical specimens(DG136 and DG167)from the Monashee complex in the southeastern Canadian Cordillera that are critical to the current understanding of rare earth element(REE)distribution between garnet and monazite(and other accessory minerals)during ***-hundred and fifty-one new monazite petrochronology spot analyses on 29 different grains across two specimens outline detailed(re)crystallization *** element data collected from the same ablated volume,interpreted in the context of new phase equilibria modelling that includes monazite,xenotime and apatite,link ages to specific portions of the pressure-temperature(P-T)paths followed by the *** linkages are further informed by garnet Lu-Hf geochronology and xenotime *** clockwise P-T paths indicate prograde metamorphism was ongoing by ca.80 Ma in both *** structurally deeper specimen,DG136,records peak P-T conditions of~755-770℃and 8.8-10.4 kbar,interpreted to coincide with(re-)crystallization of low Y monazite at~75-70 ***-rim garnet isopleths from DG167 cross in the observed peak assemblage field at~680℃ and 9.3 *** conditions are interpreted to correspond with low Y monazite(re-)crystallisation at~65 *** specimens record decompression along their retrograde path coincident with high Y 70-55 Ma and 65-55 Ma monazite populations in DG136 and DG167,*** findings broadly agree with those initially reported~20 years ago and confirm early interpretations using trace elements in monazite as generally reliable markers of metamorphic *** phase equilibria modelling and in situ petrochronological analysis,however,provide additional insight into monazite behaviour during anatexis and the effects of potential trace element buffering by REE-bearing phases such as apatite.

关键词： Monazite petrochronology Phase equilibria modelling Geochronology P-T-t paths

Feedback model of secondary electron emission in DC gas discharge plasmas

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Plasma Science and Technology 2018年第2期20卷 128-133页

作者： Saravanan ARUMUGAM Prince alex Suraj Kumar SINHA Department of Physics Pondicherrry University

Feedback is said to exist in any amplifier when the fraction of output power in fed back as an ***,in gaseous discharge ions that incident on the cathode act as a natural feedback element to stabilize and self sustain the *** present investigation is intended to emphasize the feedback nature of ions that emits secondary electrons（SEs）from the cathode surface in DC gas *** average number of SEs emitted per incident ion and non ionic species（energetic neutrals,metastables and photons）which results from ion is defined as effective secondary electronemission coefficient（ESEEC,Eg）.In this study,we derive an analytic expression that corroborates the relation betweenEg and power influx by ion to the cathode based on the feedback theory of an *** addition,experimentally,we confirmed the typical positive feedback nature of SEEfrom the cathode in argon DC glow *** experiment is done for three different cathode material of same dimension（tungsten（W）,copper（Cu）and brass）under identical discharge conditions（pressure：0.45 mbar,cathode bias：-600 v,discharge gab：15 cm and operating gas：argon）.Further,we found that theEg value of these cathode material controls the amount of feedback power given by *** difference in feedback leads different final output i.e the power carried by ion at cathode（Pi C￠∣）.The experimentally obtained value of Pi C￠∣is 4.28 W,6.87 W and9.26 W respectively for W,Cu and *** addition,the present investigation reveals that the amount of feedback power in a DC gas discharges not only affect the fraction of power fed back to the cathode but also the entire characteristics of the discharge.

关键词： feedback secondary electron emission DC gas discharges power influx by ion at cathode cathode temperature

Drag Reduction in a Swimming Humboldt Penguin, Spheniscus Humboldti, when the Boundary Layer is Turbulent

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Journal of Bionic Engineering 2005年第2期2卷 57-62页

作者： alex R.Parfitt Julian F.v. vincent Centre for Biomimetic and Natural Technologies Department of Mechanical Engineering The University of Bath Bath BA2 7AY UKCentre for Biomimetic and Natural Technologies Department of Mechanical Engineering The University of Bath Bath BA2 7AY UK

An area of protruding feathers found around the beak of many penguin species is thought to induce a turbulent boun~dary layer whilst swimming. Hydrodynamic tests on a model Humboldt penguin, Spheniscus humboldti, suggest that induced turbulence causes a significant reduction in boundary layer height, flow separation, and an average of 31 % reduction in drag (1.0 m/s to 4.5 m/s). visualisation of surface flow showed it to follow the body profile, over the feet and tail, before separating. Movement of the feet in swimming penguins correlates with steering of the bird. Induced turbulence may therefore further increase swimming efficiency by reducing the amount of foot movement required to direct the swimming bird.

关键词： drag drag reduction boundary layer turbulence penguin Spheniscus humboldti (Sphenisciformes)