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Health Emergency Response Readiness of Undergraduate Student

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Health 2017年第3期9卷 393-400页

作者： p. p. L. Or Department of Health and physical Education The Education University of Hong Kong Hong Kong (SAR) China

The increased threats of terrorism, disease outbreak and natural disasters clearly support the need to incorporate health emergency education into the school curricula to enhance emergency awareness and the development of Emergency Response Management plans. The purpose of this study was to explore the health emergency response readiness of the undergraduate students upon completion of a “Health Emergency Education” course in Hong Kong. Thirty-three undergraduate students (aged from 19 to 23) enrolled in the course were selected for investigation. A 21-item semi-structured class exercise was administered to the students before and after the course. A significant improvement in the knowledge of emergency signage was observed. There was a strong positive correlation between the participants’ knowledge of performing the cardiopulmonary resuscitation (CpR) and their confidence in giving first aid to friends (r = 0.81, p = 0.00). The participants were more confident in administering first aid to family members and friends than strangers and the findings in this study were consistent with previous studies. The elective course significantly increased the students’ health emergency knowledge and confidence to provide assistance in an emergency situation. It is important to accompany advisories with educational messages to help the public understand emergency risks and enhance response readiness.

关键词： Health Emergency Education Response Readiness Cardiopulmonary Resuscitation

Bionic Design and Finite Element Analysis of Elbow in Ice Transportation Cooling System

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Journal of Bionic Engineering 2010年第3期7卷 301-306页

作者： Dejun Miao~(1,2), Xiuhua Sui~3, Linjing Xiao~3 1. Key Laboratory of Mine Hazard prevention and Control (Ministry of Education, China), Shandong University of Science and Technology, Qingdao 266510, p. R. China 2. School of Architecture, Tsinghua University, Beijing 100084, p. R. China 3. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266510, p. R. China Key Laboratory of Mine Hazard prevention and Control (Ministry of Education China) Shandong University of Science and Technology Qingdao P. R. China School of Architecture Tsinghua University Beijing P. R. China College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao P. R. China

With the increase in mining depth, mine heat harm has appeared to be more prominent. The mine heat harm could be resolvedor reduced by ice refrigeration. Thus, ice transportation through pipeline becomes a critical problem; typically flowresistance occurs in the elbow. In the present study, according to the analysis of the surface morphology of fish scale, abiomimetic functional surface structure for the interior wall of elbow is designed. Based on the theory of liquid-solid two phaseflow, a CFD numerical simulation of ice-water mixture flowing through the elbow is carried out using finite element *** experiments of pressure drop and flow resistance for both bionic and common elbows are conducted to test theeffect of the bionic elbow on flow resistance reduction. It is found that with the increase in the ice mass fraction in the ice-watermixture, the effect of bionic elbow on resistance reduction becomes more obvious.

关键词： bionic elbow two phase flow ice transportation flow resistance reduction pressure loss

Synthesis and photoluminescent performance of novel europium(Ⅲ) carboxylates with heterocyclic ancillary ligands

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Rare Metals 2022年第4期41卷 1342-1352页

作者： priyanka Dhankhar Rekha Devi Sushma Devi Sangeeta Chahar Mandeep Dalal V.B.Taxak S.p.Khatkar priti Boora Department of Chemistry Maharshi Dayanand UniversityRohtak 124001India

Five novel europium(Ⅲ)complexes with 2-[4-(dibutylamino)-2-hydroxybenzoyl]benzoic acid(DAHB)as primary ligand and bathophenanthroline(batho),2,2’-bipyridyl(bipy),5,6-dimethyl-1,10-phenanthroline(dmph),1,10-phenanthroline(phen)as ancillary ligands were syn-thesized via solution precipitation *** structural formulae of synthesized complexes were speculated to be Eu(DABH)_(3)·2H_(2)O(C1),Eu(DABH)_(3)·batho(C2),Eu(DABH)_(3)·bipy(C3),Eu(DABH)_(3)·dmph(C4)and Eu(DABH)_(3)·phen(C5)by elemental analysis,infrared spectroscopy and proton nuclear magnetic resonance spec-troscopy(^(1)H-NMR).The photoluminescent properties and thermal stability of the complexes were investigated by photoluminescent spectroscopy and thermogravimetric analysis(TG-DTG),*** Commission Inter-nationale de I’Eclairage(CIE)color coordinates,Judd–Ofelt intensity parameter(Ω_(2)),total quantum yield,intrinsic quantum efficiency and energy transfer dynamics of com-plexes were also *** excitation spectra of com-plexes are extended up to visible *** complexes exhibit characteristic photoemission of Eu^(3+)metal ion with high color purity in red region attributed to efficient energy transfer from ligand to metal *** replacement of water molecules from coordination sphere of europium ion by ancillary ligands results in enhancement of luminescent properties of the C2–C5 complexes,indicating that ancillary ligands act as additional light harvesting centers in sensiti-zation *** thermal studies show that these complexes are suitable for meeting the requirement of temperature for fabrication of OLEDs devices.

关键词： photoluminescence Europium Sensitization Aromatic carboxylic acid Energy transfer dynamics

Characterization,spectroscopic investigation of defects by positron annihilation,and possible application of synthesized pbO nanoparticles

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Chinese physics B 2021年第2期30卷 400-407页

作者： Sk Irsad Ali Anjan Das Apoorva Agrawal Shubharaj Mukherjee Maudud Ahmed p M G Nambissan Samiran Mandal Atis Chandra Mandal Department of physics University of BurdwanGolapbagBurdwan 713104West BengalIndia Department of physics A.P.C.Roy Government CollegeSiliguriDarjeeling 734010West BengalIndia Applied Nuclear physics Division Saha Institute of Nuclear Physics1/AF BidhannagarKolkata 700064India Department of physics Government General Degree College at PedongKalimpong 734311West BengalIndia

Nanocrystalline samples of highly pure lead oxide were prepared by the sol-gel route of synthesis.X-ray diffraction and transmission electron microscopic techniques confirmed the nanocrystallinity of the samples,and the average sizes of the crystallites were found within 20 nm to 35 *** nanocrystallites exhibited specific anomalous properties,among which a prominent one is the increased lattice parameters and unit cell *** optical band gaps also increased when the nanocrystallites became smaller in *** latter aspect is attributable to the onset of quantum confinement effects,as seen in a few other metal oxide *** annihilation was employed to study the vacancy type defects,which were abundant in the samples and played crucial roles in modulating their *** defect concentrations were significantly larger in the samples of smaller crystallite *** results suggested the feasibility of tailoring the properties of lead oxide nanocrystallites for technological applications,such as using lead oxide nanoparticles in batteries for better performance in discharge rate and *** also provided the physical insight into the structural build-up process when crystallites were formed with a finite number of atoms,whose distributions were governed by the site stabilization energy.

关键词： lead oxide nanocrystals positron annihilation sol-gel processes

Degradation and fate of 2,4-dinitroanisole(DNAN)and its intermediates treated with Mg/Cu bimetal:Surface examination with XAS,DFT,and LDI-MS

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Journal of Environmental Sciences 2023年第7期129卷 161-173页

作者： Andrew Mai Emese Hadnagy Qiantao Shi Lotanna Ezeonu Jason p.Robbins Simon G.podkolzin Agamemnon Koutsospyros Christos Christodoulatos Center for Environmental Systems Stevens Institute of TechnologyHobokenNJ 07030USA School of Engineering and Technology University of Washington TacomaTacomaWA 98402USA

A novel Mg-based bimetal reagent(Mg/Cu)was used as an enhanced reductive system to degrade insensitivemunition 2,4-dinitroanisole(DNAN),a contaminant found in *** ofDNANwas significantly impacted by dissolved oxygen and studied in anoxic and oxic bimetal systems(i.e.,purging with N2,air,or O_(2) gas).Degradation occurred through sequential nitroreduction:first one nitro group was reduced(ortho or para)to form short-lived intermediates 2-amino-4-nitroanisole or 4-amino-2-nitroanisole(2-ANAN or 4-ANAN),and then subsequent reduction of the other nitro group formed 2,4-diaminoanisole(DAAN).The nitro-amino intermediates demonstrated regioselective reduction in the ortho position to 2-ANAN;Regioselectivity was also impacted by the anoxic/oxic *** O_(2)-purging DNAN degradation rate was slightly enhanced,but most notably O_(2) significantly accelerated DAAN *** also further degraded only in the oxygenated Mg/Cu *** of DNAN byproducts to the reagent occurred regardless of anoxic/oxic condition,resulting in a partition of carbon mass between the adsorbed phase(27%-35%)and dissolved phase(59%-72%).Additional surface techniqueswere applied to investigate contaminant interaction with *** functional theory(DFT)calculations identified preferential adsorption structures for DNAN on Cu with binding through two O atoms of one or both nitro groups.X-ray absorption spectroscopy(XAS)measurements determined the oxidation state of catalyticmetal Cu and formation of a Cu-O-N bond during *** desorption ionization mass spectrometry(LDI-MS)measurements also identified intermediate 2-ANAN adsorbed to the bimetal surface.

关键词： Insensitive munition Magnesium bimetal Reductive degradation Adsorption Surface analysis DFT DNAN Oxic

The abductor hallucis muscle flap-a viable surgical solution for treating first ray soft tissue defects

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plastic and Aesthetic Research 2023年第1期10卷 744-751页

作者： Sitong Chen Timothy p.Cheung Edgardo R.Rodriguez-Collazo Department of Surgery Ascension Saint JosephChicagoIL 60657USA Department of podiatric Surgery Yale New Haven HospitalNew HavenCT 06511USA

Long-standing wounds are at high risk for ***,it is critical to achieve wound healing in a timely manner;however,some complex wounds remain recalcitrant and difficult to *** muscle flaps are an underutilized technique with great utility in the reconstruction of complex foot *** a healthy bleeding base that promotes wound healing,these muscle flaps can greatly benefit the patient and prevent *** this present report,we demonstrate the use of the abductor hallucis muscle flap in the reconstruction of a complex wound following bunion surgery.

关键词： Muscle flap abductor hallucis forefoot wound limb salvage flap reconstruction soft tissue coverage

Th1 cytokines promote T-cell binding to antigen-presenting cells via enhanced hyaluronan production and accumulation at the immune synapse

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Cellular & Molecular Immunology 2010年第3期7卷 211-220页

作者： paul L Bollyky Stephen p Evanko Rebecca p Wu Susan potter-perigo S Alice Long Brian Kinsella Helena Reijonen Kelly Guebtner Brandon Teng Christina K Chan Kathy R Braun John A Gebe Gerald T Nepom Thomas N Wight Benaroya Research Institute SeattleWAUSA

Hyaluronan(HA)production by dendritic cells(DCs)is known to promote antigen presentation and to augment T-cell activation and *** hypothesized that pericellular HA can function as intercellular‘glue’directly mediating T cell–DC *** primary human cells,we observed HA-dependent binding between T cells and DCs,which was abrogated upon pre-treatment of the DCs with 4-methylumbelliferone(4-MU),an agent which blocks HA ***,T cells regulate HA production by DCs via T cell-derived cytokines in a T helper(Th)subset-specific manner,as demonstrated by the observation that cell-culture supernatants from Th1 but not Th2 clones promote HA *** effects were seen upon the addition of exogenous Th1 cytokines,IL-2,interferon c(IFN-c)and tumor necrosis factor a(TNF-a).The critical factors which determined the extent of DC–T cell binding in this system were the nature of the pre-treatment the DCs received and their capacity to synthesize HA,as T-cell clones which were pre-treated with monensin,added to block cytokine secretion,bound equivalently irrespective of their Th *** data support the existence of a feedforward loop wherein T-cell cytokines influence DC production of HA,which in turn affects the extent of DC–T cell *** also document the presence of focal deposits of HA at the immune synapse between T-cells and ApC and on dendritic processes thought to be important in antigen *** data point to a pivotal role for HA in DC–T cell interactions at the IS.

关键词： dendritic cell hyaluronan immune synapse pericellular matrix Th1

Emerging trends and prospects of electroconductive bioinks for cell-laden and functional 3D bioprinting

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Bio-Design and Manufacturing 2022年第2期5卷 396-411页

作者： Harish K.Handral Vaishali p.Natu Tong Cao Jerry Y.H.Fuh Gopu Sriram Wen F.Lu Department of Mechanical Engineering National University of SingaporeSingaporeSingapore Faculty of Dentistry National University of SingaporeSingaporeSingapore NUS Centre for Additive Manufacturing(AM.NUS) SingaporeSingapore

Introduction 3D bioprinting offers a unique biofabrication platform that allows the generation of functional tissue constructs in a spatially/geometrically controlled and automated manner using a 3 D printer and *** serves as the carrier medium that provides the ideal physico-mechanical characteristics for printability,shape fidelity,and support;and a biological microenvironment for the living cells prior to,during.

关键词： printing functional printer

High Resolution Synchrotron Diffraction Study on Charge Density Distribution of Ampicillin Trihydrate

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Chinese Journal of Chemical physics 2017年第1期30卷 50-62,I0001页

作者： C. Anzline S. lsrael R. Niranjana Devi R. A. J, R.Sheeba p. Richard Rajkumar Research and postgraduate Department of physics The American college Madurai 625002 Tamil Nadu India Mother Teresa Women＇s University Kodaikanal 624102 Tamil Nadu India Research and postgraduate Department of physics Madura College Madurai 625001 Tamil IVadu India

Charge density distribution in ampicillin trihydrate was investigated experimentally. Results were compared with the quantum calculations using density functional theory. The charge derived properties including Mulliken atomic charges, dipole moment, and molecular electrostatic potential were calculated. The multipole analysis was done for the refinement of experimental population parameters. The structure factors obtained from multipole treat- ment were used for the construction of Fourier maps. Topological properties of the charge distribution were discussed and the characteristics of （3, -1） critical points were analyzed.

关键词： Charge density Multipole analysis Density functional theory Electrophilicity index