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Multiparameter resonant imaging for studying cell interactions

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Light(Science & Applications) 2018年第1期7卷 652-653页

作者： JoséJuan-Colás thomas f.krauss Department of Physics The University of YorkHeslignton YO105DDUK Department of Electronic Engineering The University of YorkHeslignton YO105DDUK

The development of optical microscopy techniques has provided major insights into the machinery of life,from molecules to cells to tissues and *** techniques have been particularly successful in this respect by elucidating biological pathways and helping us understand the complex relationships that underpin all living *** example,the first use of fluorescence as an analytical tool in 18641 paved the way for the study of biological entities and interactions,but it was not until nearly 60 years later,in the 1930s,that fluorophores were first employed to perform biological investigations into specific tissue components and bacteria that do not *** advances led to the first labeling of an antibody with a visible label in 19413,which gave birth to the field of immunofluorescence and allowed us obtain unprecedented insight into antibody structure.

关键词： organs insight visible

Perfluoroalkane acids in human milk under the global monitoring plan of the Stockholm Convention on Persistent Organic Pollutants(2008-2019)

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frontiers of Environmental Science & Engineering 2022年第10期16卷 91-104页

作者： Heidelore fiedler Mohammad Sadia thomas krauss Abeer Baabish Leo W.Y.Yeung School of Science and Technology MTM Research Centre(O)rebro UniversitySE-70182(O)rebroSweden funda(c)ao Oswaldo Cruz(fIOCRUZ) Instituto Nacional de Controle de Qualidade em Saúde(INCQS)Avenida Brasil4365-Manguinhos EP 21.040-900Rio de Janeiro-RJBrazil

Within the global monitoring plan(GMP)established by article 16 of the Stockholm Convention on Persistent Organic Pollutants,perfluorooctane sulfonic acid(PfOS),perfluorooctanoic acid(PfOA),and perfluorohexane sulfonic acid(PfHxS)are recommended for analysis in core matrices to assess occurrence and changes geographically and with *** 101 samples consisting of 86 national pools and 15 pools from States in Brazil obtained between 2008 and 2019,PfHxS was detected in 17%of the national pools and none in *** and PfOS had a detection frequency of 100%and 92%,*** perfluoroalkane substances(PfAS)had either low detection frequencies and median values of zero(carboxylic acids C4-C11;except PfOA)or could not be quantified in any sample(sulfonic acids,C4-C10,and long-chain carboxylic acids,C_(12)-C_(14)).Correlation between PfOA and PfOS was moderately(r=0.58).Whereas median values were almost identical(18.9 pg/g *** PfOS;18.6 pg/g *** PfOA),PfOS showed larger ranges(f.w.-212 pg/g f.w.)than PfOA(f.w.-63.4 pg/g f.w.).It was shown that wealthier countries had higher PfOA concentrations than poorer *** difference in concentrations was found for samples collected in countries having or not having ratified the Stockholm Convention amendments to list PfOS or *** goal to achieve 50%decrease in concentrations within ten years was met by Antigua and Barbuda,Kenya,and Nigeria for PfOS and by Antigua and Barbuda for *** a few cases,increases were observed;one country for PfOS,four countries for PfOA.

关键词： Human biomonitoring Human breast milk LC-MS/MS analysis Lifestyle parameters

The embryology of persistent cloaca and urogenital sinus malformations

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Asian Journal of Andrology 2020年第2期22卷 124-128页

作者： David f M thomas University of Leeds LeedsWest Yorkshire LS29JTUK

Cloacal malformations are characterized by the confluence of the lower urinary tract,the female reproductive tract,and the rectum to create a common channel with a single opening on the *** presence of a cloaca is a normal phase of early human embryological *** the 4^th and 7^th weeks of gestation,the cloaca undergoes subdivision to form the hindgut and urogenital *** of this process results in the congenital anomaly termed persistent cloaca(PC).The term urorectal septum malformation sequence(URSMS)is also used to describe this *** classic description of this process which is still cited in many standard textbooks dates from the 19th ***,this has been increasingly called into question by the findings of studies using modern scientific *** sinus anomalies are defined by the confluence of the urethra and vagina to form a common channel of varying length with a single perineal *** this condition,the anorectal canal opens separately on the *** presence of a urogenital sinus represents a transient phase of the normal development of the lower genital tract in the female ***,the form of urogenital sinus most commonly encountered in the developed world is a feature of disordered sexual differentiation and does not arise simply from the persistence of the anatomical structure which is a feature of normal fetal development.

关键词： cloaca embryology urogenital sinus

Teichmller space of negatively curved metrics on complex hyperbolic manifolds is not contractible

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Science China Mathematics 2017年第4期60卷 569-580页

作者： fARRELL f. thomas SORCAR Gangotryi Yau Mathematical Sciences Center and Department of Mathematical Sciences Tsinghua University Beijing 100084 China Department of Mathematics Ohio State University Columbus OH 43210 USA

We prove that for all n = 4k- 2 and k 2 there exists a closed smooth complex hyperbolic manifold M with real dimension n having non-trivial π1(T<0(M)). T<0(M) denotes the Teichm¨uller space of all negatively curved ... 详细信息

We prove that for all n = 4k- 2 and k 2 there exists a closed smooth complex hyperbolic manifold M with real dimension n having non-trivial π1(Tf all negatively curved Riemannian metrics on M, which is the topological quotient of the space of all negatively curved metrics modulo the space of self-diffeomorphisms of M that are homotopic to the identity.

关键词： space of Riemannian metrics negative curvature complex hyperbolic space

Origin of Symmetry Breaking and Confinement in Conducting Polymers with Ring Structures

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Communications in Theoretical Physics 2007年第2X期48卷 366-368页

作者： YUAN Yuan thomas f. George SUN Xin Research Center for Quantum Manipulation Fudan University Shanghai 200433 China National Lab of Infrared Physics Shanghai 200083 China Office of the Chancellor and Center for Molecular Electronics Departments of Chemistry & Biochemistry and Physics & Astronomy Univ.ersity of Missouri-St. Louis St. Louis Missouri 63121 USA

A model to describe the main features of conjugated polymers with ring structures, such as polythiophene and polypyrrole, is constructed. It is shown that the origin of the symmetry breaking and confinement of a solit... 详细信息

关键词： polymer branch hopping symmetry breaking confinement

A nano-engineered graphene/carbon nitride hybrid for photocatalytic hydrogen evolution

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Journal of Energy Chemistry 2016年第2期25卷 223-225页

作者： Xiaobo Li Yao Zheng Anthony f.Masters thomas Maschmeyer Laboratory of Advanced Catalysis for Sustainability School of ChemistryThe University of Sydney School of Chemical Engineering University of AdelaideAdelaide Australian Institute of Nanoscale Science and Technology The University of Sydney

A metal-free photocatalytic hydrogen evolution system was successfully fabricated using heteroatom doped graphene materials as electron-transfer co-catalysts and carbon nitride as a semiconductor. The catalytic role of graphene is significantly dependent on the heteroatom dopant of the graphene, such as O, S, B, N doped/undoped graphene co-catalysts, and N-graphene shows the best catalytic hydrogen evolution rate.

关键词： Carbon nitride Co-catalyst Graphene Hydrogen evolution Photocatalysis

Inequality and workforce development in the post-COVID-19 environment:The case of Maine

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Economic and Political Studies 2023年第2期11卷 211-233页

作者： thomas f.Remington Department of Government Harvard UniversityCambridgeMAUSA Department of Political Science Emory UniversityAtlantaGAUSA International Centre for the Study of Institutions and Development National Research University Higher School of EconomicsMoscowRussia

The article analyses the interaction between the COVID-19 pandemic and social inequality in the United States,taking the state of Maine as a case *** pandemic has revealed the effects of high economic inequality on public health in the United States,where in comparison to most developed capitalist democracies,the health care system is expensive,inefficient,and highly skewed in quality and ***,for industries that were already losing jobs,the pandemic has accelerated a painful transition and intensified the harsh social and economic consequences of high and rising inequality,especially for low-wage *** case of Maine underscores the point that policies aimed at reducing the disparities in the distribution of income,health care,education,and opportunity will reduce inequality,protect public health,and stimulate economic growth.

关键词： Maine COVID-19 pandemic inequality skill formation workforce development

Efficient color routing with a dispersion-controlled waveguide array

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Light(Science & Applications) 2013年第1期2卷 220-225页

作者： Yi-Kun Liu Si-Cong Wang Yong-Yao Li Li-Yan Song Xiang-Sheng Xie Ming-Neng feng Zhi-Ming Xiao Shao-Zhi Deng Jian-Ying Zhou Jun-Tao Li Kam Sing Wong thomas f.krauss State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China Department of Physics Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina SUPA School of Physics and AstronomyUniversity of St AndrewsSt AndrewsFifeKY169SSUK

Splitting white light into its constituent spectral components has been of interest ever since Newton first discovered the phenomenon of color *** devices have since been conceived to achieve efficient wavelength separation,yet a large number of applications,e.g.,in display technology,still use simple color absorption or rejection filters that absorb or reflect unwanted wavelengths,thus wasting luminous ***,we demonstrate a novel microsized device concept that enables efficient color *** device operation is based on differential material dispersion in a waveguide array,which causes different wavelength signals to couple selectively into appropriate waveguides.A theoretical power delivery of greater than 50%for a tricolor wavelength router is obtained,compared to 33%expected from geometry *** principle of operation is demonstrated experimentally for a dual-color light field,where we achieve a higher than 70%routing efficiency(compared to 50%from geometry),thus highlighting the feasibility of this novel and promising approach.

关键词： color filters dispersion propagation route waveguides

Desertification status mapping in MuttumaWatershed by using Random forest Model

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Research in Cold and Arid Regions 2022年第1期14卷 32-42页

作者： S.Dharumarajan thomas f.A.Bishop ICAR-National Bureau of Soil Survey and Land Use Planning Regional CentreHebbalBangalor 560024India faculty of Agriculture and Environment The University of SydneySydneyNSW2006Australia

Potential of the Random forest Model on mapping of different desertification processes was studied in Muttuma watershed of mid-Murrumbidgee river region of New South Wales,*** vulnerability index was developed using climate,terrain,vegetation,soil and land quality indices to identify environmentally sensitive areas for *** forest Model(RfM)was used to predict the different desertification processes such as soil erosion,salinization and waterlogging in the watershed and the information needed to train classification algorithms was obtained from satellite imagery interpretation and ground truth *** factors(evaporation,rainfall,temperature),terrain factors(aspect,slope,slope length,steepness,and wetness index),soil properties(pH,organic carbon,clay and sand content)and vulnerability indices were used as an explanatory *** accuracy and kappa index were calculated for training and testing *** recorded an overall accuracy rate of 87.7%and 72.1%for training and testing sites,*** found larger discrepancies between overall accuracy rate and kappa index for testing datasets(72.2%and 27.5%,respectively)suggesting that all the classes are not predicted *** prediction of soil erosion and no desertification process was good and poor for salinization and water-logging ***,the results observed give a new idea of using the knowledge of desertification process in training areas that can be used to predict the desertification processes at unvisited areas.

关键词： desertification processes vulnerability indices Random forest Model extrapolation