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Photonics Research 2019年第7期7卷 98-106页

作者： Ashik A.S. callum F.O'Donnell S.chaitanya Kumar M.Ebrahim-Zadeh P.Tidemand-Lichtenberg c.pedersen DTU Fotonik Technical University of DenmarkDK-4000 RoskildeDenmark Radiantis Edifici RDITMediterranean Technology Park08860 CastelldefelsBarcelonaSpain IcFO-lnstitut de ciencies Fotoniques Barcelona Institute of Science and Technology08860 CastelldefelsBarcelonaSpain Institucio catalana de Recerca i Estudis Avan gats(IcREA) Passeig Lluis Companys 2308010 BarcelonaSpain

Mid-infrared(mid-IR) imaging and spectroscopic techniques have been rapidly evolving in recent years, primarily due to a multitude of applications within diverse fields such as biomedical imaging, chemical sensing, and food quality inspection. Mid-IR upconversion detection is a promising tool for exploiting some of these applications. In this paper, various characteristics of mid-IR upconversion imaging in the femtosecond regime are investigated using a 4 f imaging setup. A fraction of the 100 fs, 80 MHz output from a Ti:sapphire laser is used to synchronously pump an optical parametric oscillator, generating 200 fs mid-IR pulses tunable across the 2.7–4.0 μm wavelength range. The signal-carrying mid-IR pulses are detected by upconversion with the remaining fraction of the original pump beam inside a bulk LiNbO3 crystal, generating an upconverted field in the visible/near-IR range, enabling silicon-based ccD detection. Using the same pump source for generation and detection ensures temporal overlap of pulses inside the nonlinear crystal used for upconversion, thus resulting in high conversion efficiency even in a single-pass configuration. A theory is developed to calculate relevant acceptance parameters, considering the large spectral bandwidths and the reduced interaction length due to group velocity mismatch, both associated with ultrashort pulses. Furthermore, the resolution of this ultrashort-pulsed upconversion imaging system is *** is demonstrated that the increase in acceptance bandwidth leads to increased blurring in the upconverted *** presented theory is consistent with experimental observations.

关键词： upconversion observations femtosecond regime

Development and validation of a registry-based definition of eosinophilic esophagitis in Denmark

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World Journal of Gastroenterology 2013年第4期19卷 503-510页

作者： Evan S Dellon Rune Erichsen lars pedersen Nicholas J Shaheen John A Baron Henrik T Sφrensen Mogens Vyberg center for Esophageal Diseases and Swallowing and Center for Gastrointestinal Biology and DiseaseDivision of Gastroenterology and HepatologyDepartment of MedicineUniversity of North Carolina School of MedicineChapel HillNC 27599-7080United States center for Gastrointestinal Biology and Disease Division of Gastroenterology and HepatologyDepartment of MedicineUniversity of North Carolina School of MedicineChapel HillNC 27599-7080United States Department of clinical Epidemiology Aarhus University Hospital8000 AarhusDanmark Institute of Pathology Aalborg HospitalAarhus University Hospital8000 AarhusDanmark

AIM:To develop and validate a case definition of eosinophilic esophagitis(EoE) in the linked Danish health ***:For case definition development,we queried the Danish medical registries from 2006-2007 to identify candidate cases of EoE in Northern *** International classification of Diseases-10(IcD-10) and prescription codes were obtained,and archived pathology slides were obtained and re-reviewed to determine case *** used an iterative process to select inclusion/exclusion codes,refine the case definition,and optimize sensitivity and *** then re-queried the registries from 2008-2009 to yield a validation *** case definition algorithm was applied,and sensitivity and specificity were ***:Of the 51 and 49 candidate cases identified in both the development and validation sets,21 and 24 had EoE,*** of EoE cases in the development set [mean age 35 years;76% male;86% dysphagia;103 eosinophils per high-power field(eos/hpf)] were similar to those in the validation set(mean age 42 years;83% male;67% dysphagia;77 eos/hpf).Re-review of archived slides confirmed that the pathology coding for esophageal eosinophilia was correct in greater than 90% of *** registrybased case algorithms based on pathology,IcD-10,and pharmacy codes were successfully generated in the development set,one that was sensitive(90%) and one that was specific(97%).When these algorithms were applied to the validation set,they remained sensitive(88%) and specific(96%).cONcLUSION:Two registry-based definitions,one highly sensitive and one highly specific,were developed and validated for the linked Danish national health databases,making future population-based studies feasible.

关键词： Eosinophilic esophagitis Denmark Epidemiology case definition Sensitivity Specificity

液体发酵饲料对生长育肥猪的能量、干物质、蛋白质以及磷消化率的影响

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饲料与畜牧（新饲料） 2015年第11期 25-27页

作者：赵伟 c.pedersen H.H.Stein 希杰(沈阳)饲料有限公司辽宁沈阳110000

文章中的两次试验通过生长育肥猪饲喂干湿料以及发酵饲料来比较相同日粮不同处理条件下的干物质(DM)、总能(GE)和粗蛋白(cP)的表观回肠消化率(AID),以及DM、GE和P的表观总肠道消化率(ATTD)。两次试验的基础日粮组成为玉米(728g/kg)、豆... 详细信息

文章中的两次试验通过生长育肥猪饲喂干湿料以及发酵饲料来比较相同日粮不同处理条件下的干物质(DM)、总能(GE)和粗蛋白(cP)的表观回肠消化率(AID),以及DM、GE和P的表观总肠道消化率(ATTD)。两次试验的基础日粮组成为玉米(728g/kg)、豆粕(240g/kg)、大豆油(10g/kg)以及维生素和矿物元素预混料。试验1中,3组试验分别饲喂干饲料日粮,以及两种干湿混合的日粮(干湿比为1∶1和1∶3),且两种干湿日粮均是饲喂前立即混合。试验2中,3组试验分别饲喂干饲料日粮以及两种发酵日粮,发酵处理在饲喂前24h,且干湿比为1∶3混合,两组发酵饲料的区别在于发酵桶中分别剩余10%(F10)或者50%(F50)的发酵饲料时,再向其内添加固定比例的饲料和水。试验1结果显示,干湿比为1∶3时,有降低日粮DM、GE和cP的AID趋势(PcP的AID,但是其对DM和GE的AID无显著影响。F50处理水平的发酵饲料相对于F10和干饲料,有增加日粮DM ATTD的趋势,但是两种处理水平的发酵饲料对日粮中GE和P的ATTD均无显著影响。

关键词：发酵饲料液态饲料猪

Bottom-up approaches to microLEDs emitting red, green and blue light based on GaN nanowires and relaxed InGaN platelets

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chinese Physics B 2023年第1期32卷 1-10页

作者：毕朝霞 Anders Gustafsson lars Samuelson Anders Gustafsson and Lars Samuelson Division of Solid State Physics and NanoLundLund UniversityBox 118SE-22100 LundSweden

Miniaturization of light-emitting diodes(LEDs) with sizes down to a few micrometers has become a hot topic in both academia and industry due to their attractive applications on self-emissive displays for high-definition televisions,augmented/mixed realities and head-up displays, and also on optogenetics, high-speed light communication, etc. The conventional top-down technology uses dry etching to define the LED size, leading to damage to the LED side *** sizes of microLEDs approach the carrier diffusion length, the damaged side walls play an important role, reducing microLED performance significantly from that of large area LEDs. In this paper, we review our efforts on realization of microLEDs by direct bottom-up growth, based on selective area metal–organic vapor phase epitaxy. The individual LEDs based on either GaN nanowires or InGaN platelets are smaller than 1 μm in our approach. Such nano-LEDs can be used as building blocks in arrays to assemble microLEDs with different sizes, avoiding the side wall damage by dry etching encountered for the top-down approach. The technology of InGaN platelets is especially interesting since InGaN quantum wells emitting red, green and blue light can be grown on such platelets with a low-level of strain by changing the indium content in the InGaN platelets. This technology is therefore very attractive for highly efficient microLEDs of three primary colors for displays.

关键词： microLEDs RGB GaN InGaN

cellulose synthesis in land plants

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Molecular Plant 2023年第7期16卷 206-231页

作者： Gustav B.pedersen Leonard Blaschek Kristian E.H.Frandsen Lise c.Noack Staffan Persson copenhagen Plant Science center(cPSc) Department of Plant&Environmental SciencesUniversity of CopenhagenThorvaldsensvej 401871Frederiksberg CDenmark Joint International Research Laboratory of Metabolic&Developmental Sciences State Key Laboratory of Hybrid RiceSJTU-University of Adelaide Joint Centre for Agriculture and HealthSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiChina

All plant cells are surrounded by a cell wall that provides cohesion,protection,and a means of directional growth to *** microfibrils contribute the main biomechanical scaffold for most of these *** biosynthesis of cellulose,which typically is the most prominent constituent of the cell wall and therefore Earth’s most abundant biopolymer,is finely attuned to developmental and environmental *** understanding of the machinery that catalyzes and regulates cellulose biosynthesis has substantially improved due to recent technological advances in,for example,structural biology and ***,we provide a comprehensive overview of the structure,function,and regulation of the cellulose synthesis machinery and its regulatory *** aim to highlight important knowledge gaps in the field,and outline emerging approaches that promise a means to close those gaps.

关键词： plant cell wall cellulose microfibrils cellulose synthases membrane proteins cytoskeleton protein interaction

Liquid water structure from X-ray absorption and emission, NMR shielding and X-ray diffraction

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Science china(Physics,Mechanics & Astronomy) 2019年第10期62卷 68-81页

作者： Iurii Zhovtobriukh Benedito J.c.cabral carmelo corsaro Domenico Mallamace lars G.M.Pettersson Department of Physics Stockholm UniversityAlbaNova University CenterStockholm SE-106 91Sweden University of Lisboa Faculty of SciencesBioISI-Biosysterns&Integrative Sciences InstituteLisboa 1749-016Portugal MI FT Department Messina UniversityMessina IT-98166Italy

Here we investigate to what extent X-ray absorption（XAS） and emission（XES） spectroscopy, the oxygen-oxygen radial distribution function and σ（1H） and σ(17O) NMR shielding can be represented by a common set of model structures of liquid water. This is done by using a Monte carlo-based fitting technique which fits the spectra based on a library of ～1400 precomputed spectra and assigns weights to contributions from different model structures. These are then used to reweight the contributions from the structures in the library to reveal classes of structures that are over-or under-represented in the library. The goal is to include different experimental data sets which are sensitive to different aspects of liquid water structure and thus narrow down which types of structures must exist in the real liquid.

关键词： liquid water X-ray absorption X-ray emission NMR reverse Monte carlo

Electromembrane extraction–Recent trends and where to go

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Journal of Pharmaceutical Analysis 2017年第3期7卷 141-147页

作者： Stig pedersen-Bjergaard chuixiu Huang Astrid Gjelstad School of Pharmacy University of Oslo Faculty of Health and Medical Sciences School of Pharmaceutical Sciences University of Copenhagen

Electromembrane extraction(EME) is an analytical microextraction technique, where charged analytes(such as drug substances) are extracted from an aqueous sample(such as a biological fluid), through a supported liquid membrane(SLM) comprising a water immiscible organic solvent, and into an aqueous acceptor solution. The driving force for the extraction is an electrical potential(dc) applied across the SLM. In this paper, EME is reviewed. First, the principle for EME is explained with focus on extraction of cationic and anionic analytes, and typical performance data are presented. Second, papers published in 2016 are reviewed and discussed with focus on(a) new SLMs,(b) new support materials for the SLM,(c) new sample additives improving extraction,(d) new technical configurations,(e) improved theoretical understanding, and(f) pharmaceutical new applications. Finally, important future research objectives and directions are defined for further development of EME, with the aim of establishing EME in the toolbox of future analytical laboratories.

关键词： Sample preparation Microextraction Electromembrane extraction

Industrial minerals and rocks, aggregates and natural stones in the Nordic countries

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Episodes 2008年第1期31卷 133-139页

作者： Kurt Johansson Rune B. larsen Markku J. Lehtinen lars Persson Mika Raeisaenen Stig A. Schack pedersen Paer Weihed Nils-Gunnar Wik Swedish Stone Industries Federation Industrigatan 6 SE-291 36 Kristianstad Sweden. NTNU NO-7491 Trondheim. Norway. Nordkalk Oyj Abp Poikkitie 1 FI-53500 Lappeenranta Finland. Geological Survey of Sweden SE-751 87 Uppsala Sweden. Geological Survey of Finland PO Box 96 FI-02151 Espoo Finland. Geological Survey of Denmark and Greenland Ф. Voldgade 10 DK-1350 Cph. Denmark. Division of Ore Geology and Applied Geophysics Lulea University of Technology SE-971 87 Lulea Sweden. Geological Survey of Sweden SE-223 50 Lund Sweden.

The Nordic countries, including Greenland, have a long tradition in mining. The industrial minerals sector is expanding in most Nordic countries and extensive development has taken place during the last few years. The main commodities mined are carbonate rocks, quartz, feldspar, apatite, olivine and talc. A number of diferent types of dimension stones are quarried in all countries. Rock aggregates are increasingly important, replacing sand and gravel aggregate as construction materials in some countries due to the need to protect ground water supplies.

关键词：工业矿产岩石集合体天然石材北欧地区

Z charmoniumlike mesons

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chinese Physics c 2011年第7期35卷 695-702页

作者： Arafat Gabareen Mokhtar Stephen lars Olsen SLAc National Accelerator Laboratory Stanford Seoul National University KOREA

A brief review of the experimental situation concerning the electrically charged charmoniumlike meson candidates, Z-, is presented.

关键词： quarkonium exotics multiquark state