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Endo-microscopy beyond the Abbe and Nyquist limits

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Light(Science & Applications) 2020年第1期9卷 1246-1257页

作者： Lyubov V.Amitonova Johannes f.de Boer LaserLaB Department of Physics and AstronomyVrije Universiteit AmsterdamDe Boelelaan 10811081 HV AmsterdamThe Netherlands Advanced Research Center for Nanolithography(ARCNL) Science Park 1061098 XG AmsterdamThe Netherlands

for several centuries,far-field optical microscopy has remained a key instrument in many scientific disciplines,including physical,chemical,and biomedical ***,far-field imaging has many limitations:the spatial resolution is controlled by the diffraction of light,and the imaging speed follows the Nyquist–Shannon sampling *** recent development of super-resolution techniques has pushed the limits of spatial ***,these methods typically require complicated setups and long acquisition times and are still not applicable to deeptissue ***,we report imaging through an ultra-thin fibre probe with a spatial resolution beyond the Abbe limit and a temporal resolution beyond the Nyquist limit simultaneously in a simple and compact *** use the random nature of mode coupling in a multimode fibre,the sparsity constraint and compressive sensing *** new approach of super-resolution endo-microscopy does not use any specific properties of the fluorescent label,such as depletion or stochastic activation of the molecular fluorescent state,and therefore can be used for label-free *** demonstrate a spatial resolution more than 2 times better than the diffraction limit and an imaging speed 20 times faster than the Nyquist *** proposed approach can significantly expand the realm of the application of nanoscopy for bioimaging.

关键词： beyond limit fibre

Morphological traits explain the individual position within resource-consumer networks of a Neotropical marsupial

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Current Zoology 2024年第4期70卷 453-464页

作者： Nicholas f.de Camargo Hernani f.M.de oliveira Juliana f.Ribeiro Amabilio J.A.de Camargo Emerson M.Vieira Laboratorio de Ecologia de Vertebrados Departamento de EcologiaInstituto de Ciencias BiologicasUniversidade de BrasiliaCP 04457BrasiliaDF70910-900Brazil departamento de Zoologia Setor de Ciencias BiologicasUniversidade Federal do ParanaAvenida Coronel Francisco Heraclito dos Santos100CuritibaPR81531980Brazil Embrapa Cerrados Rodovia BR020km 18CP 08223PlanaltinaDE73310-970Brazil

Knowledge regarding the influence of individual traits on interaction patterns in nature can help understand the topological role of individuals within a network of intrapopulation *** tested hypotheses on the relationships between individuals'positions within networks(specialization and centrality)of 4 populations of the mouse opossum Gracilinanus agilis and their traits(i.e.,body length,body condition,tail length relative to body length,sex,reproductive condition,and botfly parasitism)and also seasonal effects in the Brazilian *** with lower body length,better body condition,and relatively shorter tail were more specialized(i.e.,less connected within the network).Individuals were also more specialized and less connected during the warm-wet *** relationship between individuals'position in the network and body traits,however,was independent of *** propose that specialization may arise not only as a result of preferred feed-ing strategies by more capable individuals(i.e.,those with better body condition and potentially prone to defend and access high-quality food resources)but alsobecause of morphological ***/younger individuals(consequently with less experience in foraging)and short-tailed individuals(less skilled to explore the vertical strata of the vegetation)would feed only on a subset of the available food resources and consequently become more ***,individuals are more specialized during the warm-wet season because of high competition(population-dense period)and higher ecological opportunities(resource-rich period).Therefore,our study reveals the relevance of individual traits inshaping interactionpatternsandspecialization inpopulations.

关键词： bodytraits centrality Cerrado Gracilinanus agilis seasonality specialization.

AdS/QCD and light front holography: A new approximation to QCD

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Chinese Physics C 2010年第9期34卷 1229-1235页

作者： Stanley J.Brodsky Guy f.de Téramond SLAC National Accelerator Laboratory Stanford University Universidad de Costa Rica

The combination of Anti-de Sitter space （AdS） methods with light-front holography leads to a semi-classical first approximation to the spectrum and wavefunctions of meson and baryon light-quark bound *** from the bound-state Hamiltonian equation of motion in QCD,we derive relativistic lightfront wave equations in terms of an invariant impact variable ζ which measures the separation of the quark and gluonic constituents within the hadron at equal light-front *** equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti–de Sitter （AdS） *** eigenvalues give the hadronic spectrum,and its eigenmodes represent the probability distributions of the hadronic constituents at a given *** to the light meson and baryon spectra are *** predicted meson spectrum has a string-theory Regge form M^ 2 = 4κ ^2 （n＋L＋S/2）;i.e.,the square of the eigenmass is linear in both L and n,where n counts the number of nodes of the wavefunction in the radial variable ζ.The space-like pion and nucleon form factors are also well *** thus obtains a remarkable connection between the description of hadronic modes in AdS space and the Hamiltonian formulation of QCD in physical space-time quantized on the light-front at fixed light-front time τ.The model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD lightfront Hamiltonian or by applying the Lippmann-Schwinger method in order to systematically include the QCD interaction terms.

关键词： gauge/gravity correspondence light-front dynamics strongly coupled QCD meson and baryon spectrum meson and nucleon form factors

AdS/QCD and Applications of Light-front Holography

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Communications in Theoretical Physics 2012年第4期57卷 641-664页

作者： Stanley J.Brodsky Guy f.de Téramond CAO Pu-Guang SLAC National Accelerator Laboratory Stanford University Stanford CA 94309 USA and CPa-Origins Southern Denmark University Odense Denmark Massey University Palmerston North New Zealand Universidad de Costa Rica San Jose Costa Rica

Light-front holography leads to a rigorous connection between hadronic amplitudes in a higher dimensional anti-de Sitter(AdS) space and frame-independent light-front wavefunctions of hadrons in(3 + 1)-dimensional physical space-time,thus providing a compelling physical interpretation of the AdS/CfT correspondence principle and AdS/QCD,a useful framework which describes the correspondence between theories in a modified AdS 5 background and confining field theories in physical *** a first semiclassical approximation,where quantum loops and quark masses are not included,this approach leads to a single-variable light-front Schro¨dinger equation which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular *** coordinate z in AdS space is uniquely identified with a Lorentz-invariant coordinate ζ which measures the separation of the constituents within a hadron at equal light-front *** internal structure of hadrons is explicitly introduced and the angular momentum of the constituents plays a key *** give an overview of the light-front holographic approach to strongly coupled *** particular,we study the photon-to-meson transition form factors(Tffs) fMγ(Q 2) for γ→ M using light-front holographic *** results for the Tffs for the η and η ' mesons are also *** novel features of QCD are discussed,including the consequences of confinement for quark and gluon condensates.A method for computing the hadronization of quark and gluon jets at the amplitude level is outlined.

关键词： gauge/gravity correspondence light-front dynamics strongly coupled QCD meson and baryon spectrum meson and nucleon form factors

Radial margin status should be determined in resected perihilar cholangiocarcinoma

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Hepatobiliary Surgery and Nutrition 2019年第5期8卷 557-559页

作者： Roeland f.de Wilde Bas Groot Koerkamp department of Surgery Erasmus MC University Medical CenterRotterdamThe Netherlands

Curative-intent resection is the only treatment of perihilarcholangiocarcinoma(pCCA)offering patients the chancefor long-term *** generally requires an(extended)hemi-hepatectomy including the caudate lobewith resectio... 详细信息

关键词： Surgery hilar dissection

Wintering Swan Geese maximize energy intake through substrate foraging depth when feeding on buried Vallisneria natans tubers

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Avian Research 2019年第2期10卷 163-170页

作者： Yan Chen Yong Zhang Lei Cao Willem f.de Boer Anthony D.fox School of Life Sciences University of Science and Technology of ChinaHefei 230027China Co-Innovation Center for Sustainable forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China Research Center for Eco-Environmental Science Chinese Academic of Sciences18 Shuangqing RoadBeijing 100085China University of Chinese Academy of Sciences 19 Yuquan RoadShijingshan DistrictBeijing 100049China Resource Ecology Group Wageningen UniversityDroevendaalsesteeg3a6708 PB WageningenThe Netherlands department of Bioscience Aarhus UniversityKalφGrenavej 148410 RφndeDenmark

Background: foraging theory predicts that animals select patches that offer the highest net rate of energy gain. Hence, prey distribution patterns and spatiotemporal heterogeneity play important roles in determining animal feeding patch selection. for waterfowl foraging on buried aquatic plant tubers, the distribution and biomass of these plant organs vary with depth in the substrate. Since excavation costs also increase with depth, the energy intake of the animals foraging on these plants is highly sediment depth dependent. Methods: Here, using observations of Swan Geese (Anser cygnoides) foraging on Vallisneria natans tubers, we test our hypothesis that geese feeding on tubers buried at intermediate sediment depth maximize their daily energy intake because of the interaction between tuber size and abundance with depth. To do this, we measured the distribution patterns of buried Vallisneria tubers under both undisturbed conditions and post-exploitation by geese (i.e. giving-up conditions). We investigated the relationship between tuber size and burial depth, and total tuber biomass within each sediment layer in undisturbed and exploited plots. finally, we compared modelled Swan Goose daily energy intake feeding on Vallisneria tubers buried at different sediment layers (1–10, 11–20 and 21–30 cm below the surface). Results: Dry weight of Vallisneria tubers linearly increased with burial depth, while average total dry weight density of tubers showed a unimodal relationship, peaking at intermediate levels. Not surprisingly, Swan Geese foraged most intensively on tubers buried at intermediate sediment depths, where they maximize their daily energy intake. Our results support our hypothesis that Swan Geese feeding on tubers at intermediate depths maximize their daily energy intake. Conclusions: Our study is the first to quantify foraging strategies of Swan Geese during the wintering period, emphasizing the importance of plant traits on foraging selection of belowground f

关键词： Energetic trade-off Optimal foraging Shengjin Lake Substrate Tuber burial depth Yangtze River

Innovative strategies and nutritional perspectives for fortifying pumpkin tissue and other vegetable matrices with iron

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food Science and Human Wellness 2020年第2期9卷 103-111页

作者： Marina f.de Escalada Pla Silvia K.flores Carolina E.Genevois Universidad de Buenos Aires Facultad de Ciencias Exactas y NaturalesDepartamento de IndustriasBuenos AiresArgentina CONICET-Universidad de Buenos Aires Instituto de Tecnologia de Alimentos y Procesos Quimicos(ITAPROQ)Buenos AiresArgentina Universidad Nacional de Entre Rios(UNER) Facultad de BromatologiaGualeguaychuEntre RiosArgentina CONICET Buenos AiresArgentina

The present review article focuses on different technological strategies and nutritional perspectives having added advantage to human health in fortifying vegetables matrices with *** introduction to the main aspects related to iron deficiency consequences is resumed in order to understand the importance of.developing new strategies for improving iron *** this sense,the tendencies and alternatives will also be *** technologies like impregnation or dry infusion are presented as sustainable options for obtaining structured fortified vegetables.A review about the usefulness of edible covers for stabilizing micronutrients and/or probiotic microorganisms in fortified matrices is also *** iron deficiency still continue to be a worldwide health issue,innovating in food fortification remains a challenge for researchers and food manufactures.

关键词： Vegetables Iron Ascorbic acid Probiotics Edible covers

Responses of breeding waterbird communities to environmental changes in subsidence wetlands in the North China Plain

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Avian Research 2023年第3期14卷 336-344页

作者： Guangyao Wang Jinming Zhao Weiqiang Li Xiangrong Song Yong Zhang Chunlin Li Willem f.de Boer School of Resources and Environmental Engineering Anhui UniversityHefei230601China School of Life Science Huaibei Normal UniversityHuaibei235000China College of Biology and the Environment Nanjing Forestry UniversityNanjing210037China Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration Anhui UniversityHefei230601China Wildlife Ecology and Conservation Group Wageningen University&Research6708PBWageningenthe Netherlands

In the context of global degradation and loss of natural wetlands,waterbirds have been increasingly using artificial wetlands as alternative ***,waterbirds are facing various threats in these artificial wetlands,due to dramatic environmental changes induced by anthropogenic *** the effects of these changes on the temporal dynamics of the waterbird communities can help understand how waterbirds adapt to environmental changes and thus formulate effective management and conservation *** this study,we carried out field surveys on waterbirds and environmental factors across 20 subsidence wetlands created by underground coal mining in the Huainan coal mining area in the breeding seasons of 2016 and *** predicted that the waterbird assemblages(i.e.,number of individuals,species richness,Shannon-Wiener diversity,Pielou evenness and species composition) differed between the two years,and that these differences were correlated with the temporal changes in environmental *** the surveyed wetlands,we recorded 26 waterbird species in 2016 and 23 in *** individual wetlands,the number of waterbird individuals and species richness increased by 71.6% and 20.1%,respectively,over the five years,with no changes in Shannon-Wiener diversity and Pielou *** overall increase in the number of bird individuals was mainly caused by an increase in vegetation gleaners and gulls that adapt well to anthropogenic *** species composition was significantly different between the two years,which was mainly caused by changes in the number of individuals of dominant species under influence of changes in human *** most wetlands,the temporal pairwiseβ-diversities could be explained by species turnover rather than nestedness,probably due to high mobility of waterbird species and dramatic changes in local *** study suggests that waterbird communities could respond to environmental changes in subsidence wetlands,

关键词： Artificial wetlands Environmental changes Subsidence wetlands Waterbird community

Improving the quantification of waterfowl migration with remote sensing and bird tracking

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Science Bulletin 2015年第23期60卷 1984-1993页

作者： Yali Si Qinchuan Xin Herbert H.T.Prins Willem f.de Boer Peng Gong Ministry of Education Key Laboratory for Earth System Modeling Center for Earth System Science Tsinghua University Joint Center for Global Change Studies Resource Ecology Group Wageningen University

Accurately quantifying waterfowl migration patterns is pertinent to monitor ecosystem health and control bird-borne infectious diseases. In this review, we summarize the current understanding of the environmental mechanisms that drive waterfowl migration and then investigate the effect of intra- and inter-annual change in food supply and temperature(e.g., climate change) on their migration patterns. Recent advances in remote sensing and animal tracking techniques make it possible to monitor these environmental factors over a wide range of scales and record bird movements in detail. The synergy of these techniques will facilitate substantial progress in our understanding of the environmental drivers of bird migration. We identify prospects for future studies to test existing hypotheses and develop models integrating up-todate knowledge, high-resolution remote sensing data and high-accuracy bird tracking data. This will allow us to predict when waterfowl will be where, in response to shortand long-term global environmental change.

关键词： Waterfowl migration · Environmentaldrivers · Phenology · Stopover ·Remote sensing ·Bird tracking