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Pulsed laser reshaping and fragmentation of upconversion nanoparticles-from hexagonal prisms to id nanorods through“Medusa”-like structures

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Nano Research 2021年第4期14卷 1141-1148页

作者： Laszlo Sajti Denis N.Karimov Vasilina V.Rocheva Nataliya A.Arkharova Kirill V.Khaydukov Oleg I.Lebedev Alexey e.Voloshin Alla N.Generalova Boris N.Chichkov evgeny V.Khaydukov AIT Austrian Institute of Technology GmbH Wiener Neustadt2700Austria Federal Scientific Research Centre“Crystallography and Photonics”Russian Academy of Sciences Moscow119333Russia Laboratoire CRISMAT UMR6508CNRS-ENSIACENUniversite CaenCaen14050France Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences Moscow 117997Russia Institutfiir Quantenoptik Leibniz Universitat HannoverHannover30167Germany Center of Biomedical engineering Institute of Molecular Medicine Sechenov First Moscow State Medical UniversityMoscow119991Russia

One dimensional(1D)nanostructures attract considerable attention,enabling a broad application owing to their unique ***,the precise mechanism of 1D morphology attainment remains a matter of *** this study,ultrafast picosecond(ps)laser-induced treatment on upconversion nanoparticles(UCNPs)is offered as a tool for 1 D-nanostructures ***,reshaping through recrystallization process and bioadaptation of initially hydrophobic(β-Na_(1.5)Y_(1.5_)F_(6):Yb^(3+),Tm^(3+)/β-Na_(1.5)Y_(1.5_)F_(6))core/shell nanoparticles by means of one-step laser treatment in water are demonstrated.“True”1D nanostructures through"Medusa^-like structures can be obtained,maintaining anti-Stokes luminescence functionalities.A matter of the one-dimensional UCNPs based on direction of energy migration processes is *** proposed laser treatment approach is suitable for fast UCNP surface modification and nano-to-nano transformation,that open unique opportunities to expand UCNP applications in industry and biomedicine.

关键词： upconversion nanoparticles fluoride crystals upconversion nanorods one-dimensional(1D)structures laser-induced reshaping

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Impact of National egyptian school feeding program on growth,development,and school achievement of school children

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World Journal of Pediatrics 2020年第4期16卷 393-400页

作者： A.M.Metwally Marwa M.el-Sonbaty L.A.el etreby e.M.Salah el-Din N.Abdel Hamid H.A.Hussien A.M.Hassanin Z.M.Monir Medical Research Division Community Medicine DepartmentNational Research Centre(Affiliation ID:60014618)DokkiCairoEgypt Department of Pediatrics College of MedicineTaibah UniversityMadinahKingdom of Saudi Arabia Medical Research Division Child Health DepartmentNational Research Centre(Affiliation ID:60014618)DokkiCairoEgypt Agricultural Research Centre GizaEgypt

Background School feeding program(SFP)increases access to education and to better *** study aims to evaluate the effects of SFP on physical growth,cognitive development,psychosocial behavior,and learning achievement of school *** A quasi-experimental study was *** intervention group included 903 pupils in the fifth grade receiving the school meal,while the control group included 886 pupils,matched for age and sex,without *** meal consisted of a pie made of flour fortified with vitamins A,B6,B12,C,thiamin,riboflavin,niacin,folate,calcium,iron,zinc,and *** position,nutritional status,and dietary behavior were *** tests were *** behavior was rated and educational achievement was *** hoc and independent sample t tests were used to detect the association of the studied parameters with the intake of school *** Children who took the meal had better scores on visual memory,auditory vigilance tests(9.71±2.80 vs.7.45±3.25;25.02±3.36 vs.10.82±8.92,respectively,Pe afternoon attention and working memory test(8.20±2.21vs.7.75±3.05)(Pess score of externalizing behavior(Pe control *** significant changes of children’s nutritional status were detected between the two *** meal was the main predictor of visual memory and auditory vigilance(Pe strongest predictor of academic achievements when combined with family size and meals’frequency(Peal improves academic achievements of school children.

关键词： Cognition Growth Performance School feeding

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Hydrodynamic and Hydroacoustic Computational Prediction of Conventional and Highly Skewed Marine Propellers Operating in Non-uniform Ship Wake

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Journal of Marine Science and Application 2020年第1期19卷 28-40页

作者： S.e.Belhenniche O.Imine O.K.Kinaci Naval Aero-Hydrodynamic Laboratory Marine Engineering DepartmentUSTO MB31000 OranAlgeria Aeronautics and Propulsion Systems Laboratory Mechanical Engineering DepartmentUSTO MB31000 OranAlgeria Faculty of Naval Architecture and Ocean engineering Istanbul Technical UniversityAyazaga34349 IstanbulTurkey Department of Naval Architecture and Marine engineering Istanbul Technical University TRNC CampusFamagusta 99520Northern Cyprus

Despite their high manufacturing cost and structural deficiencies especially in tip regions,highly skewed propellers are preferred in the marine industry,where underwater noise is a significant design ***,hydrodynamic performances should also be considered before a decision to use these propellers is *** study investigates the trade-off between hydrodynamic and hydroacoustic performances by comparing conventional and highly skewed Seiun Maru marine propellers for a noncavitating *** papers in the literature focus solely on hydroacoustic calculations for the open-water ***,propulsive characteristics are significantly different when propeller-hull interactions take *** in propulsion performance also reflect on the hydroacoustic performances of the *** this study,propeller-hull interactions were considered to calculate the noise *** than solving the full case,which is computationally demanding,an indirect approach was adopted;axial velocities from the nominal ship wake were introduced as the inlet condition of the numerical approach.A hybrid method based on the acoustic analogy was used in coupling computational fluid dynamics techniques with acoustic propagation methods,implementing the Ffowcs Williams-Hawkings(FW-H)*** hydrodynamic performances of both propellers were presented as a preliminary ***-hull interactions were included in calculations after observing good accordance between our results,experiments,and quasi-continuous method for the open-water *** the use of the time-dependent flow field data of the propeller behind a nonuniform ship wake as an input,simulation results were used to solve the FW-H equation to extract acoustic pressure and sound pressure levels for several hydrophones located in the near *** spectra results confirm that the highest values of the sound pressure levels are in the low-frequency range and the first harmonics calculated by the pres

关键词： Seiun Maru Moving reference frame Underwater acoustics Underwater noise Sound pressure level Blade passing frequency FW-H equation Hydrophones

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Impact of device resistances in the performance of graphene‑based terahertz photodetectors

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Frontiers of Optoelectronics 2024年第2期17卷 87-97页

作者： O.Castelló Sofía M.López Baptista K.Watanabe T.Taniguchi e.Diez J.e.Velázquez-Pérez Y.M.Meziani J.M.Caridad J.A.Delgado-Notario Department of Applied Physics University of Salamanca37008 SalamancaSpain Unidad de excelencia en Luz y Materia estructurada(LUMeS) University of Salamanca37008 SalamancaSpain Research Center for electronic and Optical Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan Nanotechnology Group USAL-NanolabUniversity of Salamanca37008 SalamancaSpain

In recent years,graphene field-effect-transistors(GFeTs)have demonstrated an outstanding potential for terahertz(THz)photodetection due to their fast response and *** features are essential to enable emerging THz applications,including 6G wireless communications,quantum information,bioimaging and ***,the overall performance of these photodetectors may be utterly compromised by the impact of internal resistances presented in the device,so-called access or parasitic *** this work,we provide a detailed study of the influence of internal device resistances in the photoresponse of high-mobility dual-gate GFeT *** dual-gate architectures allow us to fine tune(decrease)the internal resistance of the device by an order of magnitude and consequently demonstrate an improved responsivity and noise-equivalent-power values of the photodetector,*** results can be well understood by a series resistance model,as shown by the excellent agreement found between the experimental data and theoretical *** findings are therefore relevant to understand and improve the overall performance of existing high-mobility graphene photodetectors.

关键词： Graphene THz Photodetector Field-effect transistor Plasmonic

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Observation of a single protein by ultrafast X-ray diffraction

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Light(Science & Applications) 2024年第1期13卷 80-90页

作者： Tomas ekeberg Dameli Assalauova Johan Bielecki Rebecca Boll Benedikt J.Daurer Lutz A.eichacker Linda e.Franken Davide e.Galli Luca Gelisio Lars Gumprecht Laura H.gunn Janos Hajdu Robert Hartmann Dirk Hasse Alexandr Ignatenko Jayanath Koliyadu Olena Kulyk Ruslan Kurta Markus Kuster Wolfgang Lugmayr Jannik Lübke Adrian P.Mancuso Tommaso Mazza Carl Nettelblad Yevheniy Ovcharenko Daniel e.Rivas Max Rose Amit K.Samanta Philipp Schmidt egor Sobolev Nicusor Timneanu Sergey Usenko Daniel Westphal Tamme Wollweber Lena Worbs Paul Lourdu Xavier Hazem Yousef Kartik Ayyer Henry N.Chapman Jonas A.Sellberg Carolin Seuring Ivan A.Vartanyants Jochen Küpper Michael Meyer Filipe R.N.C.Maia Laboratory of Molecular Biophysics Department of Cell and Molecular BiologyUppsala UniversityHusargatan 3(Box 596)SE-75124 UppsalaSweden Deutsches electronen-Synchrotron DeSY Notkestrasse 8522607 HamburgGermany european XFeL Holzkoppel 422869 SchenefeldGermany Diamond Light Source Harwell Science&Innovation CampusDidcot OX110DEUK University of Stavanger Centre Organelle ResearchRichard-Johnsensgate 44021 StavangerNorway Leibniz Institute for experimental Virology(HPI) Centre for Structural Systems BiologyNotkestraße 8522607 HamburgGermany Dipartimento di Fisica“Aldo Pontremoli” Universitàdegli Studi di Milanovia Celoria 1620133 MilanoItaly Center for Free-electron Laser Science DESY22607 HamburgGermany Plant Biology Section School of Integrative Plant ScienceCornell UniversityIthacaNY 14853USA PNSensor GmbH Otto-Hahn-Ring 6D-81739 MünchenGermany Biomedical and X-Ray Physics Department of Applied PhysicsAlbaNova University CenterKTH Royal Institute of TechnologySE-10691 StockholmSweden eLI Beamlines/IoP Institute of Physics AS CR v.v.i.Na Slovance 218221 Prague 8Czech Republic Multi-User CryoeM Facility Centre for Structural Systems BiologyNotkestr.8522607 HamburgGermany University Medical Center Hamburg-eppendorf(UKe) Martinistrasse 5220246 HamburgGermany The Hamburg Center for Ultrafast Imaging Universität HamburgLuruper Chaussee 14922761 HamburgGermany Department of Physics Universität HamburgLuruper Chaussee 14922761 HamburgGermany Department of Chemistry and Physics La Trobe Institute for Molecular ScienceLa Trobe UniversityMelbourneVIC 3086Australia Division of Scientific Computing Science for Life LaboratoryDepartment of Information TechnologyUppsala UniversityBox 337SE-75105 UppsalaSweden european Molecular Biology Laboratory c/o DESYNotkestrasse 8522607 HamburgGermany Department of Physics and Astronomy Uppsala UniversityBox 516SE-75120 UppsalaSweden Max Planck Institute for the Structure and Dynamics of Matter Luruper Chaussee 14922761 HamburgGe

The idea of using ultrashort X-ray pulses to obtain images of single proteins frozen in time has fascinated and inspired *** was one of the arguments for building X-ray free-electron *** to theory,the extremely intense pulses provide sufficient signal to dispense with using crystals as an amplifier,and the ultrashort pulse duration permits capturing the diffraction data before the sample inevitably *** was first demonstrated on biological samples a decade ago on the giant *** then,a large collaboration has been pushing the limit of the smallest sample that can be *** ability to capture snapshots on the timescale of atomic vibrations,while keeping the sample at room temperature,may allow probing the entire conformational phase space of *** we show the first observation of an X-ray diffraction pattern from a single protein,that of escherichia coli GroeL which at 14 nm in diameter is the smallest biological sample ever imaged by X-rays,and demonstrate that the concept of diffraction before destruction extends to single *** the pattern,it is possible to determine the approximate orientation of the *** experiment demonstrates the feasibility of ultrafast imaging of single proteins,opening the way to single-molecule time-resolved studies on the femtosecond timescale.

关键词： smallest intense ultrafast

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Forests of West Virginia,U.S.A. and Shaanxi,China:a study in forest exploitation and recovery

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Journal of Forestry Research 2004年第1期15卷 49-54,J002-J003页

作者： Jack e.Coster 彭鸿张秦岭 Morgantown West Virginia.U.S.A 陕西水土保持局西安710004 西北农林科技大学生命科学学院陕西杨凌712100

A review of the period of unregulated exploitation of forests in the state of West Virginia (U.S.) and in Shaanxi Province, PRC was presented. economic and ecological recovery from exploitation has been different in the two regions due to basic differences in nature of the forest and in the degree and persistence of exploitive pressures. After a century since unregulated exploitation, West Virginia forests are well on the road to management for sustainability and conservation. Shaanxi's recovery from overuse and unregulated exploitation is less certain; forests are still in the early phases of ecological recovery there. Full recovery to a period of sustainability will take a century or longer. Suggestions are made for measures needed to enhance the forest recovery. Keywords Forests - Shaanxi - West Virginia - Central China - Forest exploitation - Recovery CLC number S754 Document code A Article id 1007-662X(2004)01-0049-06 Foundation item: The project was sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State education Ministry (2002–2004) and Shaanxi Provincial Foreign expert Bureau (2003).Biography: Jack e. Coster (1935-), male, professor of West Virginia University, Morgantown, West Virginia. U.S.A.Responsible editor: Song Funan

关键词： Forests Shaanxi West Virginia Central China Forest exploitation Recovery

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牙形刺idiognathodus swadei-Ⅰ.turbatus演化谱系在华南的发现及其意义

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地层学杂志 2012年第3期36卷 551-557页

作者：祁玉平胡科毅 James e.BARRICK 王秋来林巍现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所江苏南京210008 德克萨斯理工大学地球科学系美国德克萨斯拉伯克79409

经国际莫斯科阶-卡西莫夫阶界线工作组2008年的投票表决,目前全球卡西莫夫阶的底界比传统底界提高了一个多亚阶;牙形刺idiognathodus sagittalis和idiognathodus turbatus是两个候选的底界标志种。牙形刺id-iognathodus swadei-Ⅰ.turba... 详细信息

经国际莫斯科阶-卡西莫夫阶界线工作组2008年的投票表决,目前全球卡西莫夫阶的底界比传统底界提高了一个多亚阶;牙形刺idiognathodus sagittalis和idiognathodus turbatus是两个候选的底界标志种。牙形刺id-iognathodus swadei-Ⅰ.turbatus演化谱系在华南连续的深水海相碳酸盐沉积剖面---贵州罗甸纳庆剖面的发现表明,idiognathodus turbatus的首现是全球卡西莫夫阶底界的潜在标志;纳庆剖面作为目前最具潜力的候选层型剖面,值得进一步深入研究。

关键词：全球界线层型牙形刺莫斯科阶-卡西莫夫阶界线纳庆剖面罗甸贵州华南

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Promoting public health through the 2024 Compendium of Physical Activities:Strategies for adults,older adults,and wheelchair users

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Journal of Sport and Health Science 2024年第6期13卷 739-742页

作者： Stephen D.Herrmann Scott A.Conger erik A.Willis Barbara e.Ainsworth Kansas Center for Metabolism and Obesity Research University of Kansas Medical CenterKansas CityKS 66160USA Division of Physical Activity and Weight Management Department of Internal MedicineUniversity of Kansas Medical CenterKansas CityKS 66160USA Department of Kinesiology Boise State UniversityBoiseID 83725USA Prevention Research Center University of North Carolina at Chapel HillChapel HillNC 27599USA College of Health Solutions Arizona State UniversityPhoenixAZ 85003USA School of exercise and Health Shanghai University of SportShanghai 200438China

Physical activity(PA)is fundamentally linked to public health,^(1)providing benefits including chronic disease prevention and treatment,^(2)mental health,^(3)musculoskeletal health,^(4)and healthy aging,^(5)along with socioeconomic advantages.^(6)These benefits highlight the importance of promoting PA for all *** recent publication of the Compendium of Physical Activities(Compendium)serves as a valuable resource,^(7)offering an updated and expanded guide for adults(ages 19-59)with tailored energy cost values for diverse populations.

关键词： Activities prevention offering

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Mechanical suppression of breast cancer cell invasion and paracrine signaling to osteoclasts requires nucleo-cytoskeletal connectivity

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Bone Research 2020年第4期8卷 393-405页

作者： Xin Yi Laura e.Wright Gabriel M.Pagnotti gunes Uzer Katherine M.Powell Joseph M.Wallace Uma Sankar Clinton T.Rubin Khalid Mohammad Theresa A.Guise William R.Thompson Department of Physical Therapy School of Health and Rehabilitation SciencesIndiana UniversityIndianapolisIN 46202USA Department of Medicine Division of EndocrinologySchool of MedicineIndiana UniversityIndianapolisIN 46202USA Department of Mechanical and Biomedical engineering Boise State UniversityBoiseID 83725USA Department of Biomedical engineering Purdue School of Engineering and TechnologyPurdue UniversityIndianapolisIN 46202USA Department of Anatomy&Cell Biology Indiana UniversityIndianapolisIN 46202USA Department of Biomedical engineering Stony Brook UniversityStony BrookNY 11794USA

exercise benefits the musculoskeletal system and reduces the effects of *** effects of exercise are multifactorial,where metabolic changes and tissue adaptation influence *** signals,a principal component of exercise,are anabolic to the musculoskeletal system and restrict cancer *** examined the mechanisms through which cancer cells sense and respond to low-magnitude mechanical signals introduced in the form of ***-magnitude,high-frequency vibration was applied to human breast cancer cells in the form of low-intensity vibration(LIV).LIV decreased matrix invasion and impaired secretion of osteolytic factors PTHLH,IL-11,and ***,paracrine signals from mechanically stimulated cancer cells,reduced osteoclast differentiation and resorptive *** the nucleus by knockdown of SUN1 and SUN2 impaired LIV-mediated suppression of invasion and osteolytic factor *** increased cell stiffness;an effect dependent on the LINC *** data show that mechanical vibration reduces the metastatic potential of human breast cancer cells,where the nucleus serves as a mechanosensory apparatus to alter cell structure and intercellular signaling.

关键词： invasion impaired skeletal

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Providing refuges for adult Pacific lamprey entosphenus tridentatus inside fishways

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Aquaculture and Fisheries 2021年第2期6卷 144-150页

作者： Mary L.Moser Matthew L.Keefer Stephen C.Corbett Kinsey e.Frick Christopher C.Caudill Sean C.Tackley Northwest Fisheries Science Center National Marine Fisheries ServiceNational Oceanic and Atmospheric AdministrationSeattleWA98112USA Department of Fish and Wildlife Sciences College of Natural ResourcesUniversity of IdahoMoscowID83844-1136USA Ocean Associates ArlingtonVA22207USA U.S.Army Corps of engineers Environmental Resources BranchPortlandOR97204-3440USA

Fishways at hydroelectric dams are unnatural environments that typically present fish with channels of uniform depth,variable water velocity,and lack of *** retention and overall passage success may be improved by providing rest and sheltering areas inside *** examined adult Pacific lamprey entosphenus tridentatus use of two specially designed fishway refuges at Bonneville Dam on the Columbia River(northwestern USA).These relatively small boxes(1.1 m×0.4 m×0.2 m)provided low-velocity,dark refuge from predation for Pacific lamprey,a largely nocturnal *** boxes were equipped with antennas to detect entry of lamprey tagged with passive integrated transponder(PIT)*** PIT tagged and released 3,247 lamprey,including 599 that were double-tagged with a PIT and a radio transmitter,over three study years(2012-2014).In each year,PIT-tagged lamprey detected at nearby fishway exits had used a refuge:12%in 2012,28%in 2013,and 36%in *** residence time of PIT-tagged lamprey in the refuges for each year was 20.3 h,16.6 h,and 13.1 *** entrance into refuges peaked at 0300-0500 PDT,and they typically exited at around 2000 PDT,suggesting that refuges primarily functioned as shelter from *** of refuge use increased with a morphological indicator of sexual maturity(distance between dorsal fins).In the radio-tagged group,refuge users were equally likely to pass Bonneville Dam as ***,refuge users were less likely than non-users to be detected at sites upstream from the dam,perhaps owing to their maturation status or longer mean passage time through our study area(2.0 vs.0.6 d for non-users).Refuges show promise for improving fish retention in fishways,particularly for nocturnal and/or small-bodied species that seek shelter from light or predation.

关键词： fish passage retention

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