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Dynamics of self-hybridized exciton–polaritons in 2D halide perovskites

Light(Science & Applications) 2024年第1期13卷 13-22页

作者： Surendra B.Anantharaman jason Lynch Christopher e.Stevens Christopher Munley Chentao Li Jin Hou Hao Zhang Andrew Torma Thomas Darlington Francis Coen Kevin Li Arka Majumdar PJames Schuck Aditya Mohite Hayk Harutyunyan Joshua R.Hendrickson Deep Jariwala Department of electrical and Systems engineering University of PennsylvaniaPhiladelphiaPA19104USA KBR inc. BeavercreekOH45431USA Air Force Research Laboratory Sensors DirectorateWright-Patterson Air Force BaseOH45433USA Department of Physics University of WashingtonSeattleWA98195USA Department of Physics Emory UniversityAtlantaGA30322USA Department of Chemical and Biomolecular engineering Rice UniversityHoustonTX77005USA Department of Materials Science and Nanoengineering Rice UniversityHoustonTX77005USA Applied Physics Program Smalley‐Curl InstituteRice UniversityHoustonTX77005USA Department of Mechanical engineering Columbia UniversityNew YorkNY10027USA Department of electrical and Computer engineering University of WashingtonSeattleWA98195USA

excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOiPs)are capable of forming hybrid light-matter states known as exciton-polaritons(e–Ps)when the excitonic medium is confined in an optical cavity.in the case of 2D HOiPs,they can self-hybridize into e–Ps at specific thicknesses of the HOiP crystals that form a resonant optical cavity with the excitons.However,the fundamental properties of these self-hybridized e–Ps in 2D HOiPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain unclear.Here,we demonstrate that>0.5µm thick 2D HOiP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized e–P modes.These e–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and emission.Through varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy e–Ps to lower energy e–Ps.Finally,we also demonstrate that e–Ps are capable of charge transport and transfer at interfaces.Our findings provide new insights into charge and energy transfer in e–Ps opening new opportunities towards their manipulation for polaritonic devices.

关键词： charge polar excitation

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Systematic Radio Telescope Alignment Using Portable Fringe Projection Profilometry

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Nanomanufacturing and Metrology 2024年第1期7卷 75-85页

作者： Joel Berkson Justin Hyatt Nathan Julicher Byeongjoon Jeong isaac Pimienta Rachel Ball Wyatt ellis jason Voris Diego Torres‑Barajas Daewook Kim James C.Wyant College of Optical Sciences University of Arizona1630 E.University Blvd.TucsonAZ 85721USA Department of Astronomy at Steward Observatory University of Arizona933 N Cherry Ave.TucsonAZ 85721USA

in 2019,the event Horizon Telescope(eHT)released the first-ever image of a black hole event horizon.Astronomers are now aiming for higher angular resolutions of distant targets,like black holes,to understand more about the fundamental laws of gravity that govern our universe.To achieve this higher resolution and increased sensitivity,larger radio telescopes are needed to operate at higher frequencies and in larger quantities.Projects like the next-generation Very Large Array(ngVLA)and the Square-Kilometer Array(SKA)require building hundreds of telescopes with diameters greater than 10 ms over the next decade.This has a twofold effect.Radio telescope surfaces need to be more accurate to operate at higher frequencies,and the logistics involved in maintaining a radio telescope need to be simplified to support them properly in large quantities.Both of these problems can be solved with improved methods for surface metrology that are faster and more accurate with a higher resolution.This leads to faster and more accurate panel alignment and,therefore,a more productive observatory.in this paper,we present the use of binocular fringe projection profilometry as a solution to this problem and demonstrate it by aligning two panels on a 3-m radio telescope dish.The measurement takes only 10 min and directly delivers feedback on the tip,tilt,and piston of each panel to create the ideal reflector shape.

关键词： Metrology Fringe projection profilometry Off-axis alignment Radio astronomy Radio antenna

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The new kid on the block in insect pest management:sprayable RNAi goes commercial

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Science China Life Sciences 2024年第8期 1766-1768页

作者： Junjie Yan Ralf Nauen Stuart Reitz Andrei Alyokhin Jiang Zhang David Mota-Sanchez Yonggyun Kim Subba Reddy Palli Silvia i.Rondon Brian A.Nault Juan Luis Jurat-Fuentes Michael S.Crossley William e.Snyder Angharad M.R.Gatehouse Myron P.Zalucki bruce e.Tabashnik Yulin Gao Department of entomology Cornell UniversityCornell Agri Tech Department of entomology and Plant Pathology University of Tennessee Department of entomology and Wildlife ecology University of Delaware Department of entomology University of Georgia School of Natural and environmental Sciences Newcastle University School of the environment University of Queensland Shandong engineering Research Center for environment-Friendly Agricultural Pest Management College of Plant Health and MedicineQingdao Agricultural University Department of entomology University of Arizona National Center of excellence for Tuber and Root Crop Research Chinese Academy of Agricultural Sciences State Key Laboratory for Biology of Plant Disease and insect Pests Institute of Plant ProtectionChinese Academy of Agricultural Sciences Bayer AG Crop Science DivisionR&DPest Control Department of Crop and Soil Science Oregon State University School of Biology and ecology University of Maine Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural Sciences Department of entomology Michigan State University Department of Plant Medicals Andong National University Department of entomology University of Kentucky Oregon State University Oregon Integrated Pest Management Center

insect pest damage to crops is a threat to global food security(Tilman et al.,2011).Climate change,the evolution of insecticide resistance,and the phasing out of insecticides due to environmental and safety concerns exacerbate this problem.Farmers urgently need safe and effective crop protection tools to sustainably generate yields that meet ever-increasing global demand.

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Degradation and resynthesis of chlorophyll during increased oxidative stress and prolonged darkness differ between annual and perennial flax(Linum L.)

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Oil Crop Science 2024年第2期9卷 121-130页

作者： Kenyon J. Nisbett Abida Alokozai Su Hyun elizabeth Ko G. Adam Mott jason C.L. Browna Department of Biological Sciences University of Toronto ScarboroughTorontoONCanada Department of Cell&Systems Biology University of TorontoTorontoONCanada Centre for the Analysis of Genome evolution&Function University of TorontoTorontoONCanada

Among plants,there is considerable variation in lifespan:annuals live less than one year,whereas perennials live for several years,with the longest-living perennial having survived 43,600 years.As proposed by the Disposable Soma Theory,this lifespan variation among plants likely reflects differential investment of limited energy and nutrient resources,with perennials investing more energy and nutrients into biomolecular maintenance compared to annuals in order to ensure persistence over multiple seasons.Such differential investment may be particularly important during periods of exogenous stress,which are known to accelerate biomolecular damage.The present study evaluated this hypothesis using annual and perennial flax(Linum L.)subjected to two exogenous stressors—increased oxidative stress(i.e.,foliar H2O2spraying)and complete prolonged darkness.As chlorophyll has been shown to exhibit degradation in response to changes in environmental conditions,we utilized changes in chlorophyll levels during and after periods of exogenous stress to evaluate our hypotheses.We predicted that i)perennials would exhibit a slower rate of chlorophyll degradation during exposure to exogenous stressors compared to annuals,and ii)perennials would exhibit a faster rate of chlorophyll resynthesis following such exposure compared to annuals.Chlorophyll levels before,during,and after exposure to both exogenous stressors were measured in two separate trails,once using image colour analysis and once using spectrophotometry.While chlorophyll degradation rates in response to oxidative stress did not differ between annuals and perennials,contrary to our predictions,chlorophyll resynthesis rates following such exposure were significantly higher in perennials,as predicted.When plants were subjected to complete prolonged darkness,chlorophyll degradation rates were significantly lower in perennials than annuals,as predicted;however,when plants were subsequently reintroduced to natural photoperiod,chlorophyll resynthesis rates did not consistently

关键词： Ageing Life history Maximum lifespan Oxidative stress Somatic maintenance

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Regulation of proliferation by KCa3.1 channels is independent of channel electrophysiological function

Regulation of proliferation by KCa3.1 channels is independen...

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2008北京国际生理科学学术大会

作者： MiLLeRSHiP Joanne bruce jason i e DeVOR Daniel C FeARON ian M Life Sciences the University of ManchesterManchester M13 9NTUK Department of Cell Biology and Physiology School of MedicineUniversity of PittsburghPittsburghPA 15261USA

Potassium channels regulate proliferation of a number of cell types.Of the potassium channel family, K3.1(iK1/SK4),is involved in the proliferation of endothelial cells(eC),T lymphocytes and several cancer cell lines.With respect to endothelial cells,these cells express a wide variety of ion channel types and subtypes,and the patterns of expression differ due to differences in vascular beds from which cells were isolated,passage number and culture conditions.For this reason,it is difficult to dissect,and examine in isolation,the functional role of a specific potassium channel in eC proliferation.Thus,to investigate the mechanisms underlying the role of K3.1 in cell proliferation in isolation,we performed proliferation assays in HeK293 cells expressing recombinant hK3.1 channels.in cells stably expressing this channel,selective inhibition of hK3.1 with 10μmol/L TRAM-34 reduced proliferation,while transient expression of hK3.1 in WT HeK293 cells increased proliferation.The mechanism by which hK3.1 stimulates cell proliferation is thought to be mediated by cell hyperpolarisation(via K efflux),which increases[Ca] by driving Ca influx through non-selective cation channels.However,when WT HeK293 cells were transiently transfected with a mutant(GYG/AAA)hK3.1 channel,which neither conducts K ions nor promotes Ca entry,proliferation was increased relative to control(mock-transfected)cells.Furthermore,when WT HeK293 cells were transiently transfected with a trafficking mutant(L18A/L25A)hK3.1 channel,which is not expressed at the cell surface,proliferation was also increased relative to control cells.Thus,both K efflux and Ca influx are not necessary for hK 3.1-induced proliferation in HeK293 cells,and nor does hK 3.1 need to be expressed at the cell surface.We propose that hK 3.1-induced cell proliferation is independent of electrophysiological function and arises potentially due to direct regulation of intracellular signalling pathways.in support of this hypothesis,in cells expressing hK3.1 pharmacological inhibition of e

关键词： KCa3.1 endothelial cells proliferation MAP kinase

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in memory of Perry L. McCarty, seminal founder of environmental Biotechnology

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Frontiers of environmental Science & engineering 2023年第10期17卷 171-173页

作者： bruce e.Rittmann Biodesign Swette Center for environmental Biotechnology Arizona State UniversityTempeAZ 85287-5701USA

Perry L.McCarty passed away on June 4,at the age of 91.He was a revered leader in environmental engineering and Biotechnology.Dr.Perry L.McCarty passed away peacefully and with his family on June 4,2023.Perry was a world leader in environmental engineering,with special emphasis on environmental Biotechnology,in which we form partnerships with microbial communities that provide services to make human society more sustainable.i was one of Perry’s Ph.D.students,and we worked together on research,service,and publishing throughout my career.i have deep and personal knowledge of how Perry and his students developed the fundamental principles that have allowed environmental Biotechnology to flourish and advance humans’sustainability.

关键词： peace allowed passed

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Adding Value to Crop Production Systems by integrating Forage Cover Crop Grazing

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American Journal of Plant Sciences 2024年第3期15卷 180-192页

作者： Robert B. Mitchell Daren D. Redfearn Kenneth P. Vogel Terry J. Klopfenstein Galen erickson P. Stephen Baenziger bruce e. Anderson Mary e. Drewnoski Jay Parsons Steven D. Masterson Marty R. Schmer Virginia L. Jin USDA-ARS Wheat Sorghum and Forage Research Unit University of Nebraska-Lincoln Lincoln NE USA Department of Agronomy and Horticulture University of Nebraska-Lincoln Lincoln NE USA Department of Animal Science University of Nebraska-Lincoln Lincoln NE USA Department of Agricultural economics University of Nebraska-Lincoln Lincoln NE USA USDA-ARS Agroecosystem Management Research Unit University of Nebraska-Lincoln Lincoln NE USA

in addition to their value as cereal grains, wheat (Triticum aestivum L.) and triticale (× Triticosecale Wittmack) are important cool-season annual forages and cover crops. Yearling steer (Bos taurus) performance was compared in the spring following autumn establishment as for age cover crops after soybean [Glycine max (L.) Merr.] grain harvest. Replicated pastures (0.4 ha) were no-till seeded in three consecutive years into soybean stubble in autumn, fertilized, and grazed the following spring near ithaca, Ne, USA. each pasture (n = 3) was continuously stocked in spring with four yearling steers (380 ± 38 kg) for 17, 32, and 28 d in 2005, 2006, and 2007, respectively. in 2005, average daily gain (ADG) for steers grazing triticale exceeded the ADG for wheat by 0.31 kghd-1d-1. in 2006, wheat ADG exceeded that for triticale by 0.12 kghd-1d-1. in 2007, steers grazing wheat lost weight, while steers grazing triticale gained 0.20 kghd-1d-1. Based on the 3-year average animal gains valued at $1.32 kg-1, mean net return ($ ha-1 yr-1) was $62.15 for triticale and $22.55 for wheat. Since these grazed cover crops provide ecosystem services in addition to forage, grazing could be viewed as a mechanism for recovering costs and adds additional value to the system. Based on this 3-year grazing trial, triticale was superior to wheat and likely will provide the most stable beef yearling performance across years with variable weather for the western Cornbelt USA.

关键词： Cover crops Soybean Triticale Wheat

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innovations in otorhinolaryngology in the age of COViD-19: A systematic literature review

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2022年第3期8卷 224-238页

作者： e.Berryhill McCarty Liuba Soldatova jason A.Brant jason G.Newman Perelman School of Medicine at the Universityof Pennsylvania PhiladelphiaPAUSA Department of Otorhinolaryngology-Head and Neck Surgery Universityof Pennsylvania Health SystemPhiladelphiaPennsylvaniaPAUSA

Objective: Otolaryngologists are at increased occupational risk of Coronavirus Disease 2019 (COViD-19) infection due to exposure from respiratory droplets and aerosols generated during otologic, nasal, and oropharyngeal examinations and procedures. There have been a variety of guidelines and precautions developed to help mitigate this risk. While many reviews have focused on the personal protective equipment (PPe) and preparation guidelines for surgery in the COViD-19 era, none have focused on the more creative and unusual solutions designed to limit viral transmission. This review aims to fill that need.Data Sources: PubMed, Ovid/Medline, and ScopusMethods: A comprehensive review of literature was performed on September 28, 2020 using PubMed, Ovid/Medline, and Scopus databases. All english-language studies were included if they proposed or assessed novel interventions developed for Otolaryngology practice during the COViD-19 pandemic. The Preferred Reporting items for Systematic Reviews and Meta-Analyses (PRiSMA) guidelines were followed.Results: A total of 41 papers met inclusion criteria and were organized into 5 categories ("General Recommendations for Otolaryngologic Surgery’, "equipment Shortage Solutions’, "Airway Procedures’, "Nasal endoscopy and Skull Base Procedures’, and "Otologic Procedures’). Articles were summarized, highlighting the innovations created and evaluated during the COViD-19 pandemic. Creative solutions such as application of topical viricidal agents, make-shift mask filters, three-dimensional (3-D) printable adapters for headlights, aerosol containing separation boxes, and a variety of new draping techniques have been developed to limit the risk of COViD-19 transmission.Conclusions: Persistent risk of COViD-19 exposure remains high. Thus, there is an increased need for solutions that mitigate the risk of viral transmission during office procedures and surgeries, especially given that most COViD-19 positive patients present asymptomatically. This review examines and organizes creative so

关键词： COViD-19 innovations inventions Literature Review Otolaryngology

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Veterans utilizing a federally qualified health center: a clinical snapshot

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Military Medical Research 2023年第1期10卷 134-136页

作者： Thad e.Abrams bruce Alexander Antonio Flores M.Bryant Howren VHA Office of Rural Health Veterans Rural Health Resource CenterIowa CityIA 52246USA Carver College of Medicine The University of IowaIowa CityIA 52242USA Center for Access Delivery Research and evaluation(CADRe) VA Iowa City Healthcare SystemIowa CityIA 52246USA Community Health Centers of Southeastern iowa West BurlingtonIA 52655USA Department of Behavioral Sciences and Social Medicine College of MedicineFlorida State UniversityTallahasseeFL 32306USA Florida Blue Center for Rural Health Research and Policy College of MedicineFlorida State UniversityTallahasseeFL 32306USA

Dear editor,Te Veterans Health Administration(VHA)provides healthcare for over 9 million enrolled veterans with approximately 2.7 million of those residing in rural areas[1].Te MiSSiON Act of 2018 emphasizes VHA collaboration with Federally Qualifed Healthcare Centers(FQHC)to serve rural residing veterans and nearly all existing collaborations involve arrangement of payment for community-based care by VHA to FQHCs.Unfortunately,there is a paucity of descriptive clinical data on existing cross-system collaborations which may help characterize these veterans and aid understanding of conditions for which they may receive treatment across systems.Such data has implications for workforce training,development,and resource allocation[2].Te objective of this report is to describe diferent clinical profles between two mutually exclusive samples:veterans engaged in FQHC only use,and VHA-enrolled veterans engaged in dual VHA and FQHC use.

关键词： Veterans Federally qualified healthcare centers Healthcare utilization Dual use Mental health

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Prophylaxis with intraocular pressure lowering medication and glaucomatous progression in patients receiving intravitreal anti-VeGF therapy

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international Journal of Ophthalmology(english edition) 2022年第10期15卷 1611-1618页

作者： Jeanette Du James T Patrie Xiao-Yu Cai bruce e Prum Yevgeniy Shildkrot New York eye and ear infirmary of Mount Sinai 310 East 14 StreetNew YorkNY 10003USA Department of Public Health Sciences University of VirginiaP.0.Box 800717CharlottesvilleVirginia 22908USA Department of Ophthalmology University of Virginia School of Medicine1300 Jefferson Park AveCharlottesvilleVirginia 22908USA

AiM: To investigate whether pretreatment with pressurelowering medication prior to anti-vascular endothelial factor(VeGF) injections had an effect on glaucomatous progression in patients with preexisting glaucoma or ocular hypertension(OHT).MeTHODS: A total of 66 eyes from 54 patients with a preexisting diagnosis of glaucoma or OHT, treated with six or more anti-VeGF injections were selected for chart review. Primary outcome measures were rate of visual field loss in d B/year, rate of change in retinal nerve fiber layer(RNFL) thickness in microns/year, and need for additional glaucoma intervention.ReSULTS: The number of eyes requiring additional glaucoma medication was 5 of 20(25.0%) and 14 of 46(30.4%) for the pretreated and non-pretreated groups, respectively. The number of eyes requiring glaucoma laser or surgery was 4 of 20(20.0%) and 13 of 46(28.3%) for the pretreated and non-pretreated groups, respectively. estimated mean rate of pattern standard deviation decline was not significant in either group(P>0.073), with no difference between groups(P=0.332). Although both groups showed significant RNFL change from baseline(Pifference was detected between groups(P=0.467).CONCLUSiON: Pretreatment has no detectable effect on structural or functional glaucomatous progression. Patients receiving repeated injections may be at risk for glaucomatous complications requiring invasive intervention.

关键词： anti-vascular endothelial growth factor therapy pretreatment glaucomatous progression

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