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Nano Research 2024年第3期17卷 1251-1258页

作者： Zhe Li Tobias k.Misicko Fan Yang Xiaopeng Liu Zhenwei Wu Xiaoyang Gao Tao Ma Jeffrey T.Miller daniela S.Mainardi Collin D.Wick Zhenhua Zeng Yang Xiao Yue Wu Department of Chemical and Biological Engineering Iowa State University618 Bissell RoadAmesIA 50011USA Institute for Micromanufacturing Louisiana Tech University505 Tech DriveRustonLA 71272USA Davidson School of Chemical Engineering Purdue University480 Stadium Mall DriveWest LafayetteIN 47907USA Michigan Center for Materials Characterization University of Michigan2800 Plymouth RdAnn Arbor MI 48109USA College of Engineering and Science Louisiana Tech UniversityRustonLA 71272USA

Atomically thin Pt nanolayers were synthesized on the surface of Mo2TiC2 MXenes and used for the catalytic dehydrogenation of ethane and propane into ethylene and propylene,two important chemicals for the petrochemical *** compared with Pt nanoparticles,the atomically thin Pt nanolayer catalyst showed superior coke-resistance(no deactivation for 24 h),high activity(turnover frequencies(TOFs)of 0.4–1.2 s^(-1)),and selectivity(>95%)toward ethylene and *** unique Pt nanolayer has a similar geometric surface to Pt nanoparticles,enabling the investigations of the electronic effect on the catalytic performance,where the geometric effect is *** is found that the electronic effect plays a critical role in dehydrogenative product selectivity and catalyst *** metal–support interaction is found dependent on the substrate and metal components,providing wide opportunities to explore high-performance MXene-supported metallic catalysts.

关键词： MXene catalysis alkane dehydrogenation nanolayers

Small mammal community composition impacts bank vole (Clethrionomys glareolus) population dynamics and associated seroprevalence of Puumala orthohantavirus

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Integrative Zoology 2024年第1期19卷 52-65页

作者： Felicitas Maria BUJNOCH daniela REIL Stephan DREWES Ulrike MROSENFELD Rainer G.ULRICH Jens JACOB Christian IMHOLT Julius kühn-Institute Federal Research Centre for Cultivated PlantsInstitute for Epidemiology and Pathogen DiagnosticsRodent ResearchMünsterGermany University of Münster Institute for Evolution and BiodiversityMünsterGermany Friedrich-Loeffler-Institut Federal Research Institute for Animal HealthInstitute of Novel and Emerging Infectious DiseasesGreifswald-Insel RiemsGermany

Rodents are important reservoirs for zoonotic pathogens that cause diseases in *** is hypoth-esized to be closely related to pathogen prevalence through multiple direct and indirect *** example,the presence of non-host species can reduce contact rates of the main reservoir host and thus reduce the risk of transmission(“dilution effect”).In addition,an overlap in ecological niches between two species could lead to increased interspecific competition,potentially limiting host densities and reducing density-dependent pathogen transmission *** this study,we investigated the relative impact of population-level regulation of direct and indirect drivers of the prevalence of Puumala orthohantavirus(PUUV)in bank voles(Clethrionomys glareolus)during years with high *** compiled data on small mammal community composition from four regions in Germany between 2010 and *** equation modeling revealed a strong seasonality in PUUV control mechanisms in bank *** abundance of shrews tended to have a negative relationship with host abundance,and host abundance positively influenced PUUV seroprevalence,while at the same time increasing the abundance of competing non-hosts like the wood mouse(Apodemus sylvaticus)and the yellow-neckedfield mouse(Apodemusflavicollis)were associated with reduced PUUV seroprevalence in the *** results indicate that for PUUV in bank voles,dilution is associated with increased interspecific *** pressures leading to the decline of Apodemus *** a specific habitat could lead to the amplification of mechanisms promoting PUUV transmission within the host populations.

关键词： bank vole biodiversity Puumala orthohantavirus small mammals

Regulated upon activation,normal T cell expressed and secreted(RANTES)levels in the peripheral blood of patients with Alzheimer’s disease

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Neural Regeneration Research 2021年第4期16卷 775-779页

作者： Gabriela vacínová daniela vejra.k.va Robert Rusina Iva Holmerová Hana vaňková Eva Jarolímová Josef Včelák Běla Bendlová Markéta vaňková Department of Molecular Endocrinology Institute of EndocrinologyPragueCzech Republic Department of Anthropology and Human Genetics Faculty of ScienceCharles UniversityPragueCzech Republic Department of Neurology Third Faculty of Medicine of Charles University and Thomayer Hospital PragueCzech Republic II.Internal Medicine Clinic Third Faculty of MedicineCharles UniversityPragueCzech Republic Faculty of Humanitites Charles University PragueCzech Republic

Alzheimer’s disease(AD)is the most common type of dementia,but it is very difficult to diagnose with certainty,so many AD studies have attempted to find early and relevant diagnostic *** upon activation,normal T cell expressed and secreted(RANTES,also known as C-C chemokine ligand)is a chemokine involved in the migration of T cells and other lymphoid *** in RANTES levels and its expression in blood or in cerebrospinal fluid have been reported in some neurodegenerative diseases,such as Parkinson’s disease and multiple sclerosis,but also in metabolic diseases in which inflammation plays a *** aim of this observational study was to assess RANTES levels in peripheral blood as clinical indicators of *** levels of RANTES were investigated in 85 AD patients in a relatively early phase of AD(median 8.5 months after diagnosis;39 men and 46 women;average age 75.7 years),and in 78 control subjects(24 men and 54 women;average age 66 years).We found much higher plasma levels of RANTES in AD patients compared to controls.A negative correlation of RANTES levels with age,disease duration,Fazekas scale score,and the medial temporal lobe atrophy(MTA)score(Scheltens’s scale)was found in AD patients,i.e.,the higher levels corresponded to earlier stages of the *** RANTES levels were not correlated with cognitive *** AD patients,RANTES levels were positively correlated with the levels of pro-inflammatory cytokines interleukin-6 and tumor necrosis factor-α,which is consistent with the wellknown fact that AD is associated with inflammatory *** levels were also positively correlated with insulin levels in AD patients,with insulin resistance(HOMA-R)and pancreatic beta cell function(HOMA-F).This study evaluated several clinical and metabolic factors that may affect plasma levels of RANTES,but these factors could not explain the increases in RANTES levels observed in AD *** levels of RANTES appear to be an interesting

关键词： Alzheimer’s disease biomarker central nervous system cognitive impairment inflammation RANTES

Age and petrogenesis of the newly discovered Early Permian granite in the kumtor gold field， kyrgyz Tien-Shan

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Journal of Earth Science 2024年

作者： kyiazbek Asilbekov Rustam Orozbaev Etienne Skrzypek Christoph Hauzenberger Elena Ivleva daniela Gallhofer Jian-Feng Gao Nikolay Pak Anatoliy Shevkunov Anatoliy Bashkirov Aizat Zhaanbaeva Institute of Geology， National Academy of Sciences of the kyrgyz Republic Institute of Earth Sciences， University of Graz State key Laboratory of Ore Deposit Geochemistry， Institute of Geochemistry， Chinese Academy of Sciences kumtor Gold Company CJSC

Permian intrusions are widespread in the Middle and Southern Tien Shan， with fewer occurrences in the Northern Tien-Shan. Notably， many of these intrusions are spatially associated with a variety of ore deposits， indicating a significant link between magmatic activity and mineralization processes in these areas. We studied granite samples recently recovered from drilling in the kumtor gold field to evaluate their potential relationships with gold mineralization. We report major and trace element geochemistry， zircon U-Pb age and Hf isotope data for this so-called kumtor granite. The kumtor granite is metaluminous to peraluminous and belongs to the high-k and calc-alkaline series with I-type geochemical characteristics. The relatively high k2O and Na2O concentrations and low high field strength elements （HFSE） and heavy rare earth elements （HREE）， the presence of biotite within these I-type granites， together with their low zircon saturation temperatures （731–779 °C）， suggest that they were likely derived from a hydrous source formed by dehydration melting of mica-bearing， medium- to high-k metabasaltic rocks. Our zircon U-Pb dating results indicate that the kumtor granite intruded at 293 ± 1.7 Ma， which is consistent with the age range of other Middle Tien-Shan granitoids. The zircon Hf isotopic composition is εHf（t）= –7.56 to –5.05， indicating an ancient （1.39 to 1.52 Ga） crustal origin. Petrographical， geochemical and geochronological data indicate that the kumtor granite is similar to leuco-granites of the Terekty complex. Our results indicate that the kumtor granite was emplaced in the early Permian in a post-collision setting and may have temporal and genetic relationships with gold mineralization.

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knockdown of apoptosis-inducing factor disrupts function of respiratory complex I

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BIOCELL 2012年第3期36卷 121-126页

作者： MIROSLAV vaˇRECHA daniela PÁCLOVÁ JIˇRINA PROCHÁZkOVÁ PAVEL MATULA DUˇSAN CMARkO AND MICHAL kOZUBEk Centre for Biomedical Image Analysis Faculty of InformaticsMasaryk UniversityBotanická68aBrno 60200Czech Republic Department of Experimental Biology Faculty of ScienceMasaryk UniversityKotláˇrská2Brno 61137Czech Repub-lic Institute of Cellular Biology and Pathology 1st Faculty of MedicineCharles University in PragueAlbertov 4Prague 12801Czech Republic

Recent findings suggest that apoptotic protein apoptosis-inducing factor (AIF) may also play an important non-apoptotic function inside mitochondria. AIF was proposed to be an important component of respiratory chain complex I that is the major producer of superoxide radical. The possible role of AIF is still controversial. Superoxide production could be used as a valuable measure of complex I function, because the majority of superoxide is produced there. Therefore, we employed superoxide-specific mitochondrial fluo- rescence dye for detection of superoxide production. We studied an impact of AIF knockdown on function of mitochondrial complex I by analyzing superoxide production in selected cell lines. Our results show that tumoral telomerase-positive (TP) AIF knockdown cell lines display significant increase in superoxide pro- duction in comparison to control cells, while a non-tumoral cell line and tumoral telomerase-negative cell lines with alternative lengthening of telomeres (ALT) show a decrease in superoxide production. According to these results, we can conclude that AIF knockdown disrupts function of complex I and therefore increases the superoxide production in mitochondria. The distinct effect of AIF depletion in various cell lines could result from recently discovered activity of telomerase in mitochondria of TP cancer cells, but this hypothesis needs further investigation.

关键词： superoxide fluorescence microscopy image analysis mitochondria telomerase

Color-coded perfluorocarbon nanodroplets for multiplexed ultrasound and photoacoustic imaging

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Nano Research 2019年第4期12卷 741-747页

作者： daniela Y. Santiesteban kristina A. Hallam Steven k. Yarmoska Stanislav Y. Emelianov Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA School of Electrical & Computer Engineering Georgia Institute of Technology Atlanta GA 30332 USA

Laser-activated perfluorocarb on n anodroplets are an emerging class of phase-cha nge, dual-c ontrast age nts that can be utilized in ultraso und and photoacoustic imaging. Through the ability to differe ntiate subpopulations of nano droplets via laser activatio n at differe nt wavelengths of n ear-infrared light, optically-triggered color-coded perfluorocarb on nano droplets prese nt themselves as an attractive tool for multiplexed ultrasound and photoacoustic imaging. In particular, laser-activated droplets can be used to provide quantitative spatiotemporal information regarding distinct biological targets, allowing for their potential use in a wide range of diagnostic and therapeutic applications. In the work prese nted, laser-activated color-coded perfluorocarb on nan odroplets are syn thesized to selectively resp ond to laser irradiati on at corresp on ding wavele ngths. The dyn amic ultraso und and photoacoustic signals produced by laser-activated perfluorocarbon nano droplets are evaluated in situ prior to implementation in a murine model. In vivo, these particles are used to distinguish unique particle trafficking mechanisms and are show n to provide ultraso und and photoacoustic contrast for up to 72 hours within lymphatics. Overall, the con ducted studies show that laser-activated color-coded perfluorocarbo n nano droplets are a promising agent for multiplexed ultraso und and photoacoustic imaging.

关键词： multiplexed imaging perfluorocarbon nanodroplets photoacoustic imaging ultrasound imaging molecular targets

Analysis of hydrodynamic effects on biofilm thickness in fluidized-bed tapered bioreactors

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Particuology 2021年第5期19卷 48-57页

作者： daniela Maria koerich Leonardo Machado da Rosa Chemical Engineering Department University of Blumenau(FURB)3250 Sao Paulo Street89030-000 BlumenauSanta CatarinaBrazil

Fluidized beds in tapered geometries provide advantages such as a broad range of optimum operating ***,the dynamics of the flow inside these bioreactors is significantly more complex,as they promote non-uniform bioparticles *** this end,the CFD technique can give a detailed description of the flow in the ***,the aim of this work is to assess the influence of the hydrodynamic on the steady-state biofilm thickness through numerical simulations of liquid–solid fluidized *** geometries of tapered bioreactors in the operating conditions used to develop *** were run to solve the two-phase RANS equations using the open-source software OpenFOAM in *** SST k−ω model was used to estimate the turbulent features of the *** and bioparticles distribution inside the reactor were analyzed for different inlet velocities,while bioparticles collision frequency and shear stresses were evaluated for various operating *** comparison between the turbulent kinetic energy and the granular temperature indicated that the fluid flow is more turbulent than the bioparticles *** hydrodynamics influence on the steady-state biofilm thickness was assessed,and results led to the conclusion that biofilm is more sensitive to hydrodynamic shear stress than bioparticles collisions.

关键词： Liquid-solid fluidization Shear stress Particles collisions Computational fluid dynamics Biofilm Tapered bioreactors

Hsp90 Is Involved in the Regulation of Cytosolic =recursor Protein Abundance in Tomato

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Molecular Plant 2015年第2期8卷 228-241页

作者： Bodo Tillmann Sascha Roeth daniela Bublak Manuel Sommer Ernst H.k. Stelzer klaus-Dieter Scharf Enrico Schleiff Department of Molecular Cell Biology of Plants Goethe-University Max-von-Laue Street 9 60438 Frankfurt am Main Germany Cluster of Excellence 'Macromolecular Complexes' Goethe-University 60438 Frankfurt am Main Germany Center of Membrane Proteomics Goethe University Max-von-Laue Street 9 60438 Frankfurt am Main Germany Buchman Institute for Molecular Life Sciences Goethe University Max-von-Laue Street 15 60438 Frankfurt am Main Germany Institute of Cell Biology Goethe-Universitat Max-von-Laue StraBe 9 60438 Frankfurt am Main Germany

Cytosolic chaperones are involved in the regulation of cellular protein homeostasis in general. Members of the families of heat stress proteins 70 （Hsp70） and 90 （Hsp90） assist the transport of preproteins to organelles such as chloroplasts or mitochondria. In addition, Hsp70 was described to be involved in the degradation of chloroplast preproteins that accumulate in the cytosol. Because a similar function has not been established for Hsp90, we analyzed the influences of Hsp90 and Hsp70 on the protein abundance in the cellular context using an in vivo system based on mesophyll protoplasts. We observed a differential behavior of preproteins with respect to the cytosolic chaperone-dependent regulation. Some preproteins such as pOE33 show a high dependence on Hsp90, whereas the abundance of preproteins such as pSSU is more strongly dependent on Hsp70. The E3 ligase, C-terminus of Hsp70-interacting protein （Chip）, appears to have a more general role in the control of cytosolic protein abundance. We discuss why the different reaction modes are comparable with the cytosolic unfolded protein response.

关键词： Hsp70 Hsp90 chip cytosolic unfolded protein response CPR preprotein degradation

CD2 deficiency partially prevents small bowel inflammation and improves parasite control in murine Toxoplasma gondii infection

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World Journal of Gastroenterology 2007年第31期13卷 4207-4213页

作者： Nina N Pawlowski daniela Struck katja Grollich Anja A kühl Martin Zeitz Oliver Liesenfeld Jrg C Hoffmann Medizinische klinik I Charité-Universittsmedizin Berlin Campus Benjamin Franklin D12200 Berlin Germany Institut für Mikrobiologie und Hygiene Charité-Universittsmedizin Berlin Campus Benjamin Franklin D12203 Berlin Germany

To investigate whether bowel inflammation and/or parasite control is altered in the absence of the T cell adhesion molecule CD2.

关键词： CD2 IL-6 Ileitis Inflammatory bowel dis-ease Interferon-T Toxoplasma gondii

Possible markers of the Jurassic/Cretaceous boundary in the Mediterranean Tethys:A review and state of art

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Geoscience Frontiers 2011年第4期2卷 475-490页

作者： Jozef Michalik daniela Rehkov Slovakian Academy of Sciences Geological InstituteDubravska cesta 9P.O.Box 106840 05 BratislavaSlovak Republic Comenius University Faculty of Natural SciencesDepartment of Geology and PalaeontologyMlynska dolina G-1842 15 BratislavaSlovak Republic

During the last decades,several integrated studies of Tethyan Jurassic/Cretaceous boundary sections from different countries were published with the objective to indicate problems for the selection of biological,chemical or physical markers suitable for identification of the Jurassic/Cretaceous boundary-the only system boundary within the Phanerozoic still not fixed by *** the boundary between the Jurassic and Cretaceous systems is a matter of global scale *** problem of proposing possible J/k boundary stratotypes results from lack of a global index fossils, global sea level drop,paleogeographic changes causing development of isolated facies areas,as well as from the effect of Late Cimmerian *** contribution summarizes and comments data on J/k boundary interval obtained from several important Tethyan sections and shows still existing problems and discrepancies in its determination.

关键词： J/k boundary Interregional correlation Biostratigraphic proxies Calpionellids Nannofossils