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Dimensional characterization of cadmium selenide nanocrystals via indirect Fourier transform evaluation of small-angle X-ray scattering data

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Nano Research 2019年第11期12卷 2849-2857页

作者： Julian Cedric Porsiel Bilal Temel Alfred Schirmacher Egbert Buhr georg Garnweitner Institute for Particle Technology(iPAT) Technische Universität BraunschweigBraunschweig38104Germany Physikalisch-Technische Bundesanstalt Braunschweig Braunschweig38116Germany Laboratory for Emerging Nanometrology Technische Universität BraunschweigBraunschweig38106Germany

The correlation of single-particle imaging and absorption spectroscopy made the development of sizing curves possible and enabled rapid size determination of semiconductor nanocrystals based solely on optical *** increasing demand and production of such materials has resulted in a question of comparability between existing models and adequate volume-weighted size-determining measurement ***-angle X-ray scattering(SAXS)is a well-established method for obtaining nanostructural information from particle systems while operating sample quantities up to a commercial scale with a large amount of statistically based *** work utilizes laboratory SAXS to characterize cadmium selenide nanocrystals with band edge energies between 1.97 and 3.08 *** evaluation of the scattering patterns is based on an indirect Fourier transformation(IFT),while dimensional parameters are derived from the model-free pair distance distribution functions(Dmode and Dg),as well as the modeled volume(Dv)and number(Dn)-weighted size-density *** find that comparable data from D̅n agree well with existing X-ray diffraction(XRD)and with transmission electron microscopy(TEM)results described in literature;this qualifies SAXS as an equivalent integral characterization *** based on an estimate,the radius of gyration yields equivalent accurate ***,corresponding volume-weighted data are shown that can be useful when transferring information to other *** parametrization represents the largest estimated size of the sample and implies that particles interact and deviate from the spherical morphology,whereas Dv demonstrates results not considering such effects.A full set of the parameters discussed quantifies the quality of a sample.

关键词： quantum dots small angle scattering indirect Fourier transform transmission electron microscopy optical absorption spectroscopy particle size distribution

Machine learning guided high-throughput search of non-oxide garnets

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npj Computational Materials 2023年第1期9卷 1717-1725页

作者： Jonathan Schmidt Hai-Chen Wang georg Schmidt Miguel A.L.Marques Institut für Physik Martin-Luther-Universität Halle-WittenbergD-06099 HalleGermany

Garnets have found important applications in modern technologies including magnetorestriction,spintronics,lithium batteries,*** overwhelming majority of experimentally known garnets are oxides,while explorations(experimental or theoretical)for the rest of the chemical space have been limited in scope.A key issue is that the garnet structure has a large primitive unit cell,requiring a substantial amount of computational *** perform a comprehensive search of the complete chemical space for new garnets,we combine recent progress in graph neural networks with high-throughput *** apply the machine learning model to identify the potentially(meta-)stable garnet systems before performing systematic density-functional calculations to validate the *** discover more than 600 ternary garnets with distances to the convex hull below 100 meV⋅atom−*** includes sulfide,nitride,and halide *** analyze their electronic structure and discuss the connection between the value of the electronic band gap and charge balance.

关键词： structure sulfide oxides

Inherited Metabolic Diseases 1st Edition.

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Host cell entry and neutralisation sensitivity of the SARS-CoV-2 XBB.1.16 lineage

2010年

作者： georg F. hoffmann&Johannes Zschocke&William L. Nyhan

Includes bibliographical references and index.

ISBN: (数字)9783540747239

ISBN: (纸本)9783540747222

Includes bibliographical references and index.

关键词： Metabolism Inborn Errorsdiagnosis

来源：畅想之星图书光盘版（南... 评论

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Cellular & Molecular Immunology 2023年第8期20卷 969-971页

作者： Inga Nehlmeier Amy Kempf Prerna Arora Anne Cossmann Alexandra Dopfer-Jablonka Metodi V.Stankov Sebastian R.Schulz Hans-Martin Jäck georg M.N.Behrens Stefan Pöhlmann Markus hoffmann Infection Biology Unit German Primate Center—Leibniz Institute for Primate ResearchKellnerweg 437077GöttingenGermany Faculty of Biology and Psychology Georg-August-University GöttingenWilhelmsplatz 137073GöttingenGermany Department of Rheumatology and Immunology Hannover Medical SchoolCarl-Neuberg-Straße 130625HannoverGermany German Centre for Infection Research(DZIF) Partner Site Hannover-BraunschweigCarl-Neuberg-Straße 130625HannoverGermany Division of Molecular Immunology Department of Internal Medicine 3Friedrich-Alexander University of Erlangen-NürnbergGlückstraße 691054ErlangenGermany Centre for Individualized Infection Medicine(CiiM) Feodor-Lynen-Straße 730625HannoverGermany

Despite previous circulation of the highly transmissible and antibody evasive BA.2.75, BQ.1, XBB.1 and XBB.1.5 lineages, the share of infections caused by the SARS-CoV-2 lineage XBB.1.16 has gradually increased in India in early 2023, resulting in XBB.1.16 being the dominating SARS-CoV-2 lineage in India today. Since a similar trend may also take place in other countries and information on the biological properties of the XBB.1.16 lineage is scarce, we conducted a rapid assessment of the SARS-CoV-2 XBB.1.16 lineage with respect to its ability to enter cells and evade neutralisation by antibodies.

关键词： lineage neutral spite

Profound neutralization evasion and augmented host cell entry are hallmarks of the fast-spreading SARS-CoV-2 lineage XBB.1.5

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Cellular & Molecular Immunology 2023年第4期20卷 419-422页

作者： Markus hoffmann Prerna Arora Inga Nehlmeier Amy Kempf Anne Cossmann Sebastian R.Schulz Gema Morillas Ramos Luis A.Manthey Hans-Martin Jäck georg M.N.Behrens Stefan Pöhlmann Infection Biology Unit German Primate CenterKellnerweg 437077 GöttingenGermany Faculty of Biology and Psychology Georg-August-University GöttingenWilhelmsplatz 137073 GöttingenGermany Department for Rheumatology and Immunology Hannover Medical SchoolCarl-Neuberg-Straße 130625 HannoverGermany Division of Molecular Immunology Department of Internal Medicine 3Friedrich-Alexander University of Erlangen-NürnbergGlückstraße 691054 ErlangenGermany German Centre for Infection Research(DZIF) partner site Hannover-BraunschweigCarl-Neuberg-Straße 130625 HannoverGermany Centre for Individualized Infection Medicine(CiiM) FeodorLynen-Straße730625 HannoverGermany

Since late 2022, the share of infections caused by the SARS-CoV2 lineage XBB.1.5 has gradually increased in the United States,resulting in XBB.1.5 becoming the dominating SARS-CoV-2lineage in the United States and a similar trend is likely to soontake place also in European countries. However, information onthe virological properties of XBB.1.5 is scarce. Here, weconducted an initial virological assessment of the SARS-CoV-2XBB.1.5 lineage.

关键词： becoming likely lineage

Evolution of C4 Phosphoenolpyruvate Carboxylase： Enhanced Feedback Inhibitor Tolerance Is Determined by a Single Residue

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Molecular Plant 2013年第6期6卷 1996-1999页

作者： Judith Katharina Paulus, Christian Niehus georg Groth Cluster of Excellence on Plant Sciences (CEPLAS) Institute of Biochemical Plant Physiology Heinrich Heine University Düsseldorf Germany

Dear Editor, Phosphoenolpyruvate carboxylase （PEPC） is the essential enzyme for initial carbon fixation in C4 photosynthesis. The C4-PEPC evolved from a non-photosynthetic C3 ancestor by subtle sequence changes resulting in distinctly different kinetic and regulatory characteristics （Svensson et al., 1997）. Malate and aspartate, which are formed from the carboxyla- tion product of PEPC, serve as feedback inhibitors of the PEPC （Wedding et al., 1990）. Higher malate or aspartate concen- trations during C4 photosynthesis require a reduced sensitiv- ity towards the feedback inhibitors of the C4-PEPC （Jacobs et al., 2008）.

关键词： Phosphoenolpyruvate carboxylase (PEPC) Inhibitor

Mixed reproduction strategy and polyploidy facilitate dominance of Kobresia pygmaea on the Tibetan Plateau

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Journal of Plant Ecology 2016年第1期9卷 87-99页

作者： Elke Seeber georg Miehe Isabell Hensen Yongping Yang Botany Department Senckenberg Museum of Natural History GörlitzPO Box 300154D-02806 GörlitzGermany Department of Geobotany and Botanical Garden University Halle-WittenbergAm Kirchtor 1D-06108 Halle(Saale)Germany Department of Geography University MarburgDeutschhausstraße 10D-35032 MarburgGermany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5eD-04103 LeipzigGermany Kunming Institute of Botany Chinese Academy of SciencesHeilongtan 650204KunmingChina Present address Department of GeographyUniversity MarburgDeutschhausstraße 10D-35032 MarburgGermany

Aims The sedge Kobresia pygmaea is the dominant species of high-altitude pastures in Tibet,and it is the most important source of forage in animal *** present the first comprehensive reproduction study for this perennial key species that adopts a molecular approach and tests how sexual and vegetative reproduction,as well as ploidy,relate to survival and dominance under harsh *** We assessed inflorescence numbers of *** across two Tibetan alpine pastures with differing grazing *** was tested in untreated diaspores and then following mechanical and chemical *** a 4-year experiment,we assessed diaspore viability and seed bank *** eight microsatellite markers,we recorded multilocus genotypes in hierarchical grids and measured their ploidy using flow *** analysis of variance models were used to analyse data on sexual reproduction,while the complement of the Simpson index and the Shannon diversity index were used to characterize the spatial distribution of multilocus genotypes and clonal *** Findings Inflorescence production was high and differed significantly between years(2010:617±460 SD;2012:2015±1213 SD)but not between grazing *** viability was high(94%)and gradually decreased after 3 and 4 years of storage in the *** not exposed to further scarification failed to germinate,while mechanical and chemical(H2SO4)scarification increased germination to 9 and 44%,*** diversity was high,although in situ germination was rarely *** genotypes intersected and covered a mean area of 0.74 *** individuals were found to be tetraploid,with only 0.8%of all ramets being *** conclude that *** survives on the Tibetan Plateau by employing a mixed reproduction strategy involving both sexual and clonal *** species’adaptability and dominance is further facilitated by its *** pasture restoration usi

关键词： alpine rangelands clonal diversity flow cytometry grazing microsatellite analyses

Elevated plasma levels of N-terminal pro-brain natriuretic peptide in patients with chronic hepatitis C during interferon-based antiviral therapy

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World Journal of Gastroenterology 2006年第36期12卷 5875-5877页

作者： Jrg Bojunga Christoph Sarrazin georg Hess Stefan Zeuzem Internal Medicine Ⅱ Saarland University Hospital 66421 Homburg/Saar Germany Roche Diagnostics 68305 Mannheim Germany

AIM: To investigate plasma levels of N-terminal pro-brain natriuretic peptide (NT-proBNP), an established marker of cardiac function, in patients with chronic hepatitis C during interferon-based antiviral therapy. METHODS: Using a sandwich immunoassay, plasma levels of NT-proBNP were determined in 48 patients with chronic hepatitis C at baseline, wk 24 and 48 during antiviral therapy and at wk 72 during ***: Plasma NT-proBNP concentrations were significantly increased (P < 0.05) at wk 24, 48 and 72 compared to the baseline values. NT-proBNP concentrations at baseline and wk 24 were closely correlated (r = 0.8; P < 0.001). At wk 24, 7 (14.6%) patients had NT-proBNP concentrations above 200 ng/L compared to 1 (2%) patient at baseline (P = 0.059). Six of these 7 patients had been treated with high-dose IFN-α induction therapy. In multiple regression analysis, NT-proBNP was not related to other clinical parameters, biochemical parameters of liver disease or virus load and response to ***: Elevated levels of NT-proBNP during and after interferon-based antiviral therapy of chronic hepatitis C may indicate the presence of cardiac dysfunction, which may contribute to the clinical symptoms observed in patients during therapy. Plasma levels of NT-proBNP may be used as a diagnostic tool and for guiding therapy in patients during interferon-based antiviral therapy.

关键词： Hepatitis C N-terminal pro-brain natriuretic peptide Interferon Cardiomyopathy Treatment side effects

From Lung to Brain:Respiration Modulates Neural and Mental Activity

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Neuroscience Bulletin 2023年第10期39卷 1577-1590页

作者： Josh Goheen John A.E.Anderson Jianfeng Zhang georg Northof The Royal Ottawa Mental Health Centre The University of OttawaOttawa K1Z 7K4Canada Department of Cognitive Science Carleton UniversityOttawa K1S 5B6Canada Center for Brain Disorders and Cognitive Sciences Shenzhen UniversityShenzhen 518060China School of Psychology Shenzhen UniversityShenzhen 518060China

Respiration protocols have been developed to manipulate mental states,including their use for therapeutic *** this systematic review,we discuss evidence that respiration may play a fundamental role in coordinating neural activity,behavior,and *** main findings are:(1)respiration affects the neural activity of a wide variety of regions in the brain;(2)respiration modulates different frequency ranges in the brain’s dynamics;(3)different respiration protocols(spontaneous,hyperventilation,slow or resonance respiration)yield different neural and mental effects;and(4)the effects of respiration on the brain are related to concurrent modulation of biochemical(oxygen delivery,pH)and physiological(cerebral blood flow,heart rate variability)*** conclude that respiration may be an integral rhythm of the brain’s neural *** provides an intimate connection of respiration with neuro-mental features like emotion.A respiratory-neuro-mental connection holds the promise for a brain-based therapeutic usage of respiration in mental disorders.

关键词： Respiration Cognition Emotion Heart rate variability Carbon dioxide