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Aerosol jet printing of surface acoustic wave microfluidic devices

Microsystems & Nanoengineering 2024年第1期10卷 231-242页

作者： Joseph Rich Brian Cole Teng Li Brandon Lu Hanyu Fu Brittany N.Smith Jianping Xia Shujie Yang Ruoyu Zhong James L.doherty Kanji Kaneko Hiroaki Suzuki Zhenhua Tian Aaron d.Franklin Tony Jun Huang department of Biomedical Engineering Duke UniversityDurhamNC 27708USA department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA department of Mechanical Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA Thomas Lord department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA deptartment of Precision Mechanics Faculty of Science and EngineeringChuo UniversityTokyo 112-8551Japan department of Chemistry Duke UniversityDurhamNC 27708USA

The addition of surface acoustic wave(SAW)technologies to microfluidics has greatly advanced lab-on-a-chip applications due to their unique and powerful attributes,including high-precision manipulation,versatility,integrability,biocompatibility,contactless nature,and rapid ***,the development of SAW microfluidic devices is limited by complex and time-consuming micro/nanofabrication techniques and access to cleanroom facilities for multistep photolithography and vacuum-based *** simplify the fabrication of SAW microfluidic devices with customizable dimensions and functions,we utilized the additive manufacturing technique of aerosol jet *** successfully fabricated customized SAW microfluidic devices of varying materials,including silver nanowires,graphene,and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEdOT:PSS).To characterize and compare the acoustic actuation performance of these aerosol jet printed SAW microfluidic devices with their cleanroom-fabricated counterparts,the wave displacements and resonant frequencies of the different fabricated devices were directly measured through scanning laser doppler ***,to exhibit the capability of the aerosol jet printed devices for lab-on-a-chip applications,we successfully conducted acoustic streaming and particle concentration ***,we demonstrated a novel solution-based,direct-write,single-step,cleanroom-free additive manufacturing technique to rapidly develop SAW microfluidic devices that shows viability for applications in the fields of biology,chemistry,engineering,and medicine.

关键词： printing wave fluid

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Estimating the subsolar magnetopause position from soft X-ray images using a low-pass image filter

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Earth and Planetary Physics 2024年第1期8卷 173-183页

作者： Hyangpyo Kim Hyunju K.Connor Jaewoong Jung Brian M.Walsh david Sibeck Kip d.Kuntz Frederick S.Porter Catriana K.Paw U Rousseau A.Nutter Ramiz Qudsi Rumi Nakamura Michael Collier Space Research Institute Austrian Academy of Sciences8042 GrazAustria Geophysical Institute University of Alaska FairbanksFairbanksAlaska 99775USA National Aeronautics and Space Administration(NASA)Goddard Space Flight Center GreenbeltMaryland 20771USA Astronomy department University of Maryland College ParkCollege ParkMaryland 20742USA Center for Space Physics Boston UniversityBostonMassachusetts 02215USA department of Physics and Astronomy Johns Hopkins UniversityBaltimoreMaryland 21218USA Howard University WashingtonDC 20059USA

The Lunar Environment heliospheric X-ray Imager(LEXI)and Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)missions will image the Earth’s dayside magneto pause and cusps in soft X-rays after their respective launches in the near future,to specify glo bal magnetic reconnection modes for varying solar wind *** suppo rt the success of these scientific missions,it is critical to develop techniques that extract the magnetopause locations from the observed soft X-ray *** this research,we introduce a new geometric equation that calculates the subsolar magnetopause position(RS)from a satellite position,the look direction of the instrument,and the angle at which the X-ray emission is *** assumptions are used in this method:(1)The look direction where soft X-ray emissions are maximized lies tangent to the magnetopause,and(2)the magnetopause surface near the subsolar point is almost spherical and thus RSis nea rly equal to the radius of the magneto pause *** create synthetic soft X-ray images by using the Open Geospace General Circulation Model(OpenGGCM)global magnetohydrodynamic model,the galactic background,the instrument point spread function,and Poisson *** then apply the fast Fourier transform and Gaussian low-pass filte rs to the synthetic images to re move noise and obtain accurate look angles for the soft X-ray pea *** the filte red images,we calculate RS and its accuracy for different LEXI locations,look directions,and solar wind densities by using the OpenGGCM subsolar magnetopause location as ground *** method estimates RS with an accuracy ofd density exceeds>10 *** accuracy improves for greater solar wind densities and during southward interplanetary magnetic *** method ca ptures the magnetopause motion during southwa rd interplaneta ry magnetic field ***,the technique will enable quantitative analysis of the magnetopause motion and help reveal the daysi

关键词： soft X-ray magnetopause reconnection low-pass filter LEXI SMILE

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A detailed comparison of the composition of(RE)-Ba-Cu-O-Ag bulk superconductors

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Superconductivity 2024年第1期9卷 87-94页

作者： J.V.J.Congreve Y.Shi A.R.dennis H.druiff N.C.Tutt d.A.Cardwell J.H.durrell department of Engineering University of CambridgeCambridgeUK

The homogeneity of the microstructure and composition are critical in determining the properties of rare earthbarium‐cuprate,single grain bulk superconductors[(RE)BCO].The magnitude of the trapped magnetic field achieveable in these technologically important materials,in particular,is influenced heavily by the size and distribution of(RE)_(2)BaCuO_(x)(RE‐211)flux pinning inclusions in the bulk microstructure,whereas the size and distribution of silver agglomerates present within the bulk superconducting matrix correlate directly with improved mechanical *** careful engineering,these materials have significant potential for application in range of devices related to energy storage,medicine,electro‐magnetic machinery and microelectronic *** of(RE)BCO bulk superconductors typically involves heating a powder compact above its peritectic decomposition temperature followed by slow cooling to facilitate the growth of a single ***(RE)BCO composition has a different peritectic temperature and growth rate,which,therefore,necessitates different requirements in the heating *** fabrication temperature and growth rate,for example,may have an effect on the RE‐211 and silver distribution,which may,in turn,affect the superconducting properties of the resulting single *** this work we compare the distributions of silver and RE‐211 in the single grain microstructures of YBCOAg,GdBCO‐Ag,EuBCO‐Ag and SmBCO‐Ag bulk superconductors using optical microscopy,scanning electron microscopy and energy dispersive X‐ray *** observe that the distributions are very similar along both the a/b‐axis and c‐axis of these *** suggests that factors other than the maximum temperature used to achieve peritectic decomposition and the rate of single grain growth are particularly influential in determining the properties of the as‐processed samples in the top seeded melt growth *** observation demonstrates there is freedom to us

关键词： YBCO‐Ag GdBCO‐Ag SmBCO‐Ag EuBCO‐Ag Composition Bulk superconductor

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等离子体技术制备具有亚微米颗粒结构的球化W-Cu伪合金微粉

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 592-603页

作者： A.V.SAMOKHIN N.V.ALEKSEEV A.A.dOROFEEV A.A.FAdEEV M.A.SINAYSKIY I.d.ZAVERTIAEV Y.V.GRIGORIEV Institute of Metallurgy and Materials Science Russian Academy of SciencesMoscow 119334Leninsky prospect 49Russian Federal Scientific Research Center“Crystallography and Photonics” Russian Academy of SciencesMoscow 119334Leninsky prospect 59Russian

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微... 详细信息

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微粒,收率为50%。最后,用热等离子体射流处理由纳米粉末组成的微粒,形成致密的球形W-Cu颗粒。成品粉末的球化度为90%~95%,体积密度为8.1 g/cm^(3),流动性约为12 s/50 g,杂质中O、C和H的含量(质量分数)分别为0.7%、0.02%~0.2%和0.03%~0.05%。

关键词： W-Cu复合材料等离子体化学合成造粒等离子体球化纳米颗粒微粒微粉

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Polyethylene glycol fusion repair of severed rat sciatic nerves reestablishes axonal continuity and reorganizes sensory terminal fields in the spinal cord

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Neural Regeneration Research 2025年第7期20卷 2095-2107页

作者： Emily A.Hibbard Liwen Zhou Cathy Z.Yang Karthik Venkudusamy Yessenia Montoya Alexa Olivarez George d.Bittner dale R.Sengelaub Program in Neuroscience Indiana UniversityBloomingtonINUSA department of Neuroscience University of Texas at AustinAustinTXUSA

Peripheral nerve injuries result in the rapid degeneration of distal nerve segments and immediate loss of motor and sensory functions;behavioral recovery is typically *** used a plasmalemmal fusogen,polyethylene glycol(PEG),to immediately fuse closely apposed open ends of severed proximal and distal axons in rat sciatic *** have previously reported that sciatic nerve axons repaired by PEG-fusion do not undergo Wallerian degeneration,and PEG-fused animals exhibit rapid(within 2–6 weeks)and extensive locomotor ***,our previous report showed that PEG-fusion of severed sciatic motor axons was non-specific,i.e.,spinal motoneurons in PEG-fused animals were found to project to appropriate as well as inappropriate target *** this study,we examined the consequences of PEG-fusion for sensory axons of the sciatic *** adult male and female rats(Sprague–dawley)received either a unilateral single cut or ablation injury to the sciatic nerve and subsequent repair with or without(Negative Control)the application of *** action potentials recorded immediately after PEG-fusion repair confirmed conduction across the injury *** success of PEG-fusion was confirmed through Sciatic Functional Index testing with PEG-fused animals showing improvement in locomotor function beginning at 35 days *** 2–42 days postoperatively,we anterogradely labeled sensory afferents from the dorsal aspect of the hindpaw following bilateral intradermal injection of wheat germ agglutinin conjugated horseradish ***-fusion repair reestablished axonal *** to unoperated animals,labeled sensory afferents ipsilateral to the injury in PEG-fused animals were found in the appropriate area of the dorsal horn,as well as inappropriate mediolateral and rostrocaudal ***,despite having intact peripheral nerves,similar reorganizations of labeled sensory afferents were also observed contralateral to the injury and repa

关键词： axotomy dorsal horn peripheral nerve injury plasticity polyethylene glycol(PEG) sciatic nerve sensory terminals wheat germ agglutinin horseradish peroxidase

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Pd-1^(+)and TIM-3^(+)T cells widely express commonγ-chain cytokine receptors in multiple myeloma patients,and IL-2,IL-7,IL-15 stimulation up-regulates Pd-1 and TIM-3 on T cells

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Oncology Research 2024年第10期32卷 1575-1587页

作者： EGOR V.BATOROV ALISA d.INESHINA TATIANA A.ARISTOVA VERA V.dENISOVA SVETLANA A.SIZIKOVA dARIA S.BATOROVA GALINA Y.USHAKOVA EKATERINA Y.SHEVELA ELENA R.CHERNYKH Laboratory of Cellular Immunotherapy Research Institute of Fundamental and Clinical ImmunologyNovosibirsk630099Russia V.Zelman Institute of Medicine and Psychology Novosibirsk National Research State UniversityNovosibirsk630090Russia department of Hematology and Bone Marrow Transplantation Research Institute of Fundamental and Clinical ImmunologyNovosibirsk630099Russia

Background:Immune checkpoint ligand-receptor interactions appear to be associated with multiple myeloma(MM)***,previous studies showed the possibility of Pd-1 and TIM-3 expression on T cells upon stimulation with commonγ-chain family cytokines in vitro and during homeostatic *** aim of the present work was to study the impact of homeostatic proliferation on the expansion of certain T cell subsets upregulating Pd-1 and TIM-3 checkpoint ***:The expression of Cd25,Cd122,Cd127 commonγ-chain cytokine receptors,phosphorylated signal transducer and activator of transcription-5(pSTAT5)and eomesodermin(EOMES)was comparatively assessed with flow cytometry in Pd-1-and TIM-3-negative and positive T cells before the conditioning and during the first post-transplant month in peripheral blood samples of MM ***:Substantial proportions of Pd-1-and TIM-3-positive T lymphocytes expressed commonγ-chain cytokine receptors and *** of cytokine receptor expressing cells were significantly higher within TIM-3+T cells compared to Pd-1+TIM-3−*** proportions of both Pd-1-/TIM-3-negative and positive Cd8+T cells express EOMES,while only moderate frequencies of Cd4+Pd-1+/TIM-3+T cells up-regulate this transcription ***,the surface presence of Cd25 and intranuclear expression of EOMES in Cd4+T cells were mutually exclusive regardless of Pd-1 and TIM-3 *** stimulation with commonγ-chain cytokines up-regulates Pd-1 and TIM-3 during the proliferation of initially Pd-1/TIM-3-negative T cells but fails to expand initially Pd-1+and TIM-3+T cell subsets in ***:Both Pd-1 and TIM-3 expressing T cells appear to be able to respond to homeostatic cytokine *** in commonγ-chain cytokine receptor expression between Pd-1+and TIM-3+T cells may reflect functional dissimilarity of these cell *** blockade appears to alleviate lymphopenia-induced prolif

关键词： Autologous hematopoietic stem cell transplantation(AHSCT) Cd25 Cd122 Eomesodermin(EOMES) Homeostatic proliferation

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Are there sex-based disparities in cataract surgery?

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 137-143页

作者： Matthew d.Geiger Anne M.Lynch Alan G.Palestine Nathan C.Grove Karen L.Christopher Richard S.davidson Michael J.Taravella Naresh Mandava Jennifer L.Patnaik department of Ophthalmology University of Colorado School of MedicineAuroraCO 80045USA

AIM:To investigate sex-based differences in the occurrence of intra-operative and post-operative complications and associated visual outcomes following cataract ***:This was a retrospective study of patients who had phacoemulsification cataract surgery at the University of Colorado School of *** collected included the patient’s health history,ocular comorbidities,operative and post-operative complications,and the post-operative best corrected visual acuity(BCVA).The data were analyzed using univariate and multivariable logistic regression with generalized estimating equations to account for the correlation of some patients having two eyes included in the ***:A total of 11977 eyes from 7253 patients were included in the *** comorbidities differed by sex,with males having significantly higher percentages of traumatic cataracts(males 0.7%vs females 0.1%),prior ocular surgery(6.7%vs 5.5%),and mature cataracts(2.8%vs 1.9%).Conversely,females had significantly higher rates of pseudoexfoliation(2.0%vs 3.2%).In unadjusted analysis,males had higher rates of posterior capsular rupture(0.8%vs 0.4%)and vitreous loss(1.0%vs 0.6%),but this difference was not significant after adjustment for *** had a significantly increased risk of post-operative retinal detachment,but in multivariable analysis this was no longer *** were significantly less likely to undergo post-operative neodymium-doped yttrium aluminum garnet(Nd:YAG)laser capsulotomy for posterior capsule opacification(OR=0.8,95%CI=0.7-0.9,P=0.0005).The BCVA was slightly worse for males pre-operatively;but post-operatively,both sexes exhibited similar visual acuity of Snellen equivalent 20/***:The study finds that in a cohort of patients presenting for cataract surgery,sex differences exist in pre-operative comorbidities and surgical characteristics that contribute to higher rates of some complications for ***,observed surgical complicatio

关键词： cataract surgery sex-based disparity phacoemulsification outcomes

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Honey vesicle-like nanoparticles protect aged liver from non-alcoholic steatohepatitis

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3661-3679页

作者： Baolong Liu Phuong Linh Nguyen Han Yu Xingzhi Li Huiren Wang Tram Gia Bao Nguyen Prakash Kumar Sahoo Meghna Sur Jay Reddy Sarah Sillman Stephen d.Kachman Bara Altartouri Guoqing Lu Sathish Kumar Natarajan Mahesh Pattabiraman Jiujiu Yu department of Nutrition and Health Sciences University of Nebraska-LincolnLincolnNE 68583USA Shaanxi Key Laboratory of Molecular Biology for Agriculture College of Animal Science and TechnologyNorthwest A&F UniversityYangling 712100China department of Nutrition Case Western Reserve UniversityClevelandOH 44106USA School of Veterinary Medicine and Biomedical Sciences University of Nebraska-LincolnLincolnNE 68583USA department of Statistics University of Nebraska-LincolnLincolnNE 68583USA Center for Biotechnology University of Nebraska-LincolnLincolnNE 68588USA department of Biology University of Nebraska OmahaOmahaNE 68182USA department of Chemistry University of Nebraska-KearneyKearneyNE 68849USA

Non-alcoholic steatohepatitis(NASH),an advanced form of non-alcoholic fatty liver disease(NAFLd),has emerged as the leading cause of liver failure and related ***,no medication is specifically approved to treat NAFLd or *** we report that oral administration of honey vesiclelike nanoparticles(H-VLNs)to naturally aged mice protects the liver from NASH development.H-VLNs are dominantly taken up by Kupffer cells in the liver and suppress hepatic chronic inflammation and further development of fibrosis and nodule formation in aged *** their reported antiinflammasome function,H-VLNs are found to inhibit the transcriptional activities of C-JUN and nuclear factor-kappa B(NF-κB).MicroRNAs miR5119 and miR5108 and phenolic compound luteolin in H-VLNs are identified in suppressing both the C-JUN and NF-kB ***,oral intake of H-VLNs represents a promising new user-friendly modality to prevent the development of NASH.

关键词： Honey Extracellular vesicles Exosomes Nanoparticles microRNAs Aging Inflammation Non-alcoholic steatohepatitis

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New solutions for combatting implant bacterial infection based on silver nano-dispersed and gallium incorporated phosphate bioactive glass sputtered films:A preliminary study

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Bioactive Materials 2022年第2期7卷 325-340页

作者： B.W.Stuart G.E.Stan A.C.Popa M.J.Carrington I.Zgura M.Necsulescu d.M.grant m.grantadvanced materials research group faculty of engineeringuniversity of nottinghamnottinghamng72rduk national institute of materials physics magurelero077125romania army centre for medical research bucharestro010195romania

Ag/Ga were incorporated into resorbable orthopaedic phosphate bioactive glasses(PBG,containing P,Ca,Mg,Na,and Fe)thin films to demonstrate their potential to limit growth of Staphylococcus aureus and Escherichia coli in post-operative prosthetic *** target consecutive co-sputtering was uniquely employed to produce a 46 nm Ag:PBG composite observed by high resolution TEM to consist of uniformly dispersed~5 nm metallic Ag nano-particles in a glass ***^(3+)was integrated into a phosphate glass preform target which was magnetron sputtered to film thicknesses of~400 or 1400 *** coatings exhibited high surface energy of 75.4-77.3 mN/m,attributed to the presence of hydrolytic P-O-P structural surface *** profiles obtained in deionized water,nutrient broth and cell culture medium showed varying ion release profiles,whereby Ga release was measured in 1400 nm coating by ICP-MS to be~6,27,and 4 ppm respectively,fully dissolving by 24 *** of Ag nanoparticles was only observed in nutrient broth(~9 ppm by 24 h).Quantification of colony forming units after 24 h showed encouraging antibacterial efficacy towards both ***(4-log reduction for Ag:PBG and 6-log reduction for Ga-PBG≈1400 nm)and ***(5-log reduction for all physical vapour deposited layers)*** Hs27 fibroblast and mesenchymal stem cell line in vitro tests indicated good cytocompatibility for all sputtered layers,with a marginal cell proliferation inertia in the case of the Ag:PBG composite thin *** study therefore highlights the(i)significant manufacturing development via the controlled inclusion of metallic nanoparticles into a PBG glass matrix by dual consecutive target co-sputtering and(ii)potential of PBG resorbable thin-film structures to incorporate and release cytocompatible/antibacterial *** architectures showed prospective bio-functional performance for a future generation of endo-osseous implant-type coatings.

关键词： Phosphate bioactive glass Silver Gallium Antibacterial Implant coating Magnetron sputtering

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Mechanisms of pulmonary endothelial barrier dysfunction in acute lung injury and acute respiratory distress syndrome

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Chinese Medical Journal Pulmonary and Critical Care Medicine 2024年第2期2卷 80-87页

作者： Yunchao Su Rudolf Lucas david J.R.Fulton Alexander d.Verin department of Pharmacology&Toxicology Medical College of GeorgiaAugusta UniversityAugustaGA 30912USA division of Pulmonary and Critical Care Medicine Department of MedicineMedical College of GeorgiaAugusta UniversityAugustaGA 30912USA Vascular Biology Center Medical College of GeorgiaAugusta UniversityAugustaGA 30912USA Research Service Charlie Norwood Veterans Affairs Medical CenterAugustaGA 30912USA

Endothelial cells(ECs)form a semi-permeable barrier between the interior space of blood vessels and the un-derlying *** endothelial barrier integrity is maintained through coordinated cellular processes involving receptors,signaling molecules,junctional complexes,and protein-regulated cytoskeletal *** acute lung injury(ALI)or its more severe form acute respiratory distress syndrome(ARdS),the loss of endothelial barrier integrity secondary to endothelial dysfunction caused by severe pulmonary inflamma-tion and/or infection leads to pulmonary edema and ***-inflammatory agonists such as histamine,thrombin,bradykinin,interleukin 1𝛽,tumor necrosis factor𝛼,vascular endothelial growth factor,angiopoietin-2,and platelet-activating factor,as well as bacterial toxins and reactive oxygen species,cause dynamic changes in cytoskeletal structure,adherens junction disorganization,and detachment of vascular endothelial cadherin(VE-cadherin)from the actin cytoskeleton,leading to an increase in endothelial *** interactions with leukocytes,platelets,and coagulation enhance the inflammatory ***,inflammatory infil-tration and the associated generation of pro-inflammatory cytokines during infection cause EC death,resulting in further compromise of the structural integrity of lung endothelial *** the use of potent antibiotics and aggressive intensive care support,the mortality of ALI is still high,because the mechanisms of pulmonary EC barrier disruption are not fully *** this review,we summarized recent advances in the studies of endothelial cytoskeletal reorganization,inter-endothelial junctions,endothelial inflammation,EC death,and endothelial repair in ALI and ARdS,intending to shed some light on the potential diagnostic and therapeutic targets in the clinical management of the disease.

关键词： Lung Endothelium Pulmonary edema Acute lung injury Acute respiratory distress syndrome

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