4,286 results match your criteria Angewandte Chemie International Edition [Journal]


Reversible Optical Writing and Data Storage in an Anthracene-Loaded Metal-Organic Framework.

Angew Chem Int Ed Engl 2018 Dec 11. Epub 2018 Dec 11.

Katholieke Universiteit Leuven, Microbial and Molecular Systems, Celestijnenlaan 200 F, 3001 , Leuven, BELGIUM.

Metal-organic frameworks (MOFs) enable the design of host-guest systems with specific properties. In this work, we show how confinement of anthracene in a well-chosen MOF host leads to reversible yellow-to-purple photoswitching of the fluorescence emission. This behavior has not been observed before for anthracene, either in pure form or adsorbed in other porous hosts. Read More

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December 2018
1 Read

[Publications German-speaking countries in high impact journals: development and validation of a search filter].

Pflege 2018 Dec 14:1-10. Epub 2018 Dec 14.

3 Sektion für Forschung und Lehre in der Pflege, Institut für Sozialmedizin und Epidemiologie, Universitätsklinikum Schleswig-Holstein, Universität zu Lübeck.

Publications German-speaking countries in high impact journals: development and validation of a search filter Abstract.

Background: The number of publications in journals with a high impact factor is an indication of a discipline's participation in international discourse. A search filter allows reliable and reproducible searches for specific publications. Read More

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December 2018

Factors Controlling the Diels-Alder Reactivity of Hetero-1,3-Butadienes.

ChemistryOpen 2018 Dec 26;7(12):995-1004. Epub 2018 Nov 26.

Department of Theoretical Chemistry, Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands.

We have quantum chemically explored the Diels-Alder reactivities of a systematic series of hetero-1,3-butadienes with ethylene by using density functional theory at the BP86/TZ2P level. Activation strain analyses provided physical insight into the factors controlling the relative cycloaddition reactivity of aza- and oxa-1,3-butadienes. We find that dienes with a terminal heteroatom, such as 2-propen-1-imine ( or acrolein (, are less reactive than the archetypal 1,3-butadiene (), primarily owing to weaker orbital interactions between the more electronegative heteroatoms with ethylene. Read More

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December 2018

Formation of Si/organic interfaces using alkyne-functionalized cyclooctynes-precursor-mediated adsorption of linear alkynes versus direct adsorption of cyclooctyne on Si(0 0 1).

J Phys Condens Matter 2019 Jan;31(3):034001

Institut für Angewandte Physik, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany.

Adsorption of ethynyl-cyclopropyl-cyclooctyne (ECCO), an alkyne-functionalized cyclooctyne, on Si(0 0 1) was studied by means of x-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). Together, XPS and STM results clearly indicate chemoselective adsorption of ECCO on Si(0 0 1) via a [2+2] cycloaddition of the strained triple bond of cyclooctyne without reaction of the ethynyl group. The results are compared to the adsorption of acetylene on Si(0 0 1): CH adsorbs on Si(0 0 1) via a precursor-mediated reaction channel as it was shown by means of temperature dependent measurements of the sticking probability as well as by means of STM experiments at variable temperature. Read More

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January 2019

Nonlinear plasmonic response of doped nanowires observed by infrared nanospectroscopy.

Nanotechnology 2018 Dec 3. Epub 2018 Dec 3.

Institute for Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, Dresden, 01328, GERMANY.

We report a strong shift of the plasma resonance in highly doped GaAs/InGaAs core/shell nanowires for intense infrared excitation observed by scattering-type scanning near-field infrared microscopy. The studied nanowires show a sharp plasma resonance at a photon energy of about 125 meV in the case of continuous-wave excitation by a CO<sub>2</sub> laser. Probing the same nanowires with the pulsed free-electron laser with peak electric field strengths up to several 10 kV/cm reveals a power-dependent redshift to about 95 meV and broadening of the plasmonic resonance. Read More

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December 2018

Lifestyle interventions in Muslim patients with metabolic syndrome-a feasibility study.

Eur J Clin Nutr 2018 Dec 11. Epub 2018 Dec 11.

Experimental & Clinical Research Center - a joint co-operation between Charité Universitätsmedizin Berlin and Max-Delbrück Center for Molecular Medicine, Berlin, Lindenberger Weg 80, 13125, Berlin, Germany.

Obesity, metabolic syndrome, and type-2 diabetes mellitus are common in Muslim patients living in Germany, most of whom are of Turkish origin. Lifestyle interventions must be tailored to religion and ethnicity. We tested the body weight-reducing effect of a 30% calorie-reduced intake diet, adjusted to individual energy expenditure, eating habits, and food preferences in a Turkish-background cohort. Read More

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December 2018

[The adaptive Freiburg monosyllabic test in noise : Development of a procedure and comparison of the results with the Oldenburg sentence test].

HNO 2018 Dec 5. Epub 2018 Dec 5.

Campus Lübeck, Klinik für HNO-Heilkunde, Universitätsklinikum Schleswig-Holstein, Lübeck, Deutschland.

Background: Whereas sentence tests are commonly performed using an adaptive procedure, this method has not yet been transferred to the Freiburg monosyllabic speech test, the most important word test. When using different procedures, a comparison of results between sentence and word tests is not possible. Therefore, an adaptive procedure which has proven itself in sentence tests was transferred to the Freiburg monosyllabic test in noise. Read More

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December 2018

[Lab on a Chip].

Authors:
Klaus S Drese

Internist (Berl) 2018 Nov 30. Epub 2018 Nov 30.

ISAT - Institut für Sensor- und Aktortechnik, Hochschule für angewandte Wissenschaften Coburg, Am Hofbräuhaus 1b, 96450, Coburg, Deutschland.

Background: Miniaturization has not only driven microelectronics and generated new unforeseen options but has also dramatically changed sensors and analytics.

Developments: The Lab on a Chip (LOC) technology enables laboratory processes to run fully automated in canals in the micrometre range. The biggest challenge for LOC is to keep production costs low despite miniaturization and application-specific design. Read More

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November 2018

[Preparedness to provide care in relation to the satisfaction with hospital discharge planning and level of knowledge of relatives to elderly patients].

Pflege 2018 Dec 5:1-12. Epub 2018 Dec 5.

4 Nursing Science & Care GmbH, Winterthur.

Preparedness to provide care in relation to the satisfaction with hospital discharge planning and level of knowledge of relatives to elderly patients Abstract.

Background: Relatives are a great resource for older people who are discharged after hospitalization. Studies have so far shown very little about the readiness of relatives to aid in caregiving. Read More

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December 2018

[Psychometric evaluation of the German version of the Health Regulatory Focus Scale].

Z Psychosom Med Psychother 2018 Dec;64(4):394-410

Fachbereich Angewandte Humanwissenschaften Hochschule Magdeburg-Stendal Deutschland Fachbereich Angewandte Humanwissenschaften.

Psychometric evaluation of the German version of the Health Regulatory Focus Scale Objectives: This study examines the psychometric properties of the German version of the Health Regulatory Focus Scale (HRFS), which measures health-related promotion- and prevention-based motivation.

Methods: The study is based on data from the 28th (N = 332) and 29th survey wave (N = 253) of the Saxony Longitudinal Study. It examines item characteristics, factorial, convergent and prognostic validity as well as the influence of sociodemographic variables. Read More

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December 2018

A fast quantum interface between different spin qubit encodings.

Nat Commun 2018 11 29;9(1):5066. Epub 2018 Nov 29.

RIKEN, Center for Emergent Matter Science (CEMS), Wako-shi, Saitama, 351-0198, Japan.

Single-spin qubits in semiconductor quantum dots hold promise for universal quantum computation with demonstrations of a high single-qubit gate fidelity above 99.9% and two-qubit gates in conjunction with a long coherence time. However, initialization and readout of a qubit is orders of magnitude slower than control, which is detrimental for implementing measurement-based protocols such as error-correcting codes. Read More

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November 2018

[Interdisciplinary recommendations for action in dupilumab-related inflammatory eye diseases].

Hautarzt 2018 Nov 26. Epub 2018 Nov 26.

Klinik für Dermatologie und Allergologie, Medizinische Hochschule Hannover, Hannover, Deutschland.

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November 2018
2 Reads

LmCDA1 organizes the cuticle by chitin deacetylation in Locusta migratoria.

Insect Mol Biol 2018 Nov 24. Epub 2018 Nov 24.

Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, 030006, China.

Cells produce an extracellular matrix (ECM) with a stereotypic organization that is important for tissue function. The insect cuticle is a layered ECM that mainly consists of the polysaccharide chitin and associated proteins adopting a quasi-crystalline structure. Our understanding of the molecular mechanisms deployed during construction of the highly ordered protein-chitin ECM so far is limited. Read More

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November 2018
1 Read

Designing a Robust Kelvin Probe Setup Optimized for Long-Term Surface Photovoltage Acquisition.

Sensors (Basel) 2018 Nov 21;18(11). Epub 2018 Nov 21.

Institut für Angewandte Physik, Technische Universität Dresden, Nöthnitzer Str. 61, 01187 Dresden, Germany.

We introduce a robust low-budget Kelvin probe design that is optimized for the long-term acquisition of surface photovoltage (SPV) data, especially developed for highly resistive systems, which exhibit-in contrast to conventional semiconductors-very slow photoinduced charge relaxation processes in the range of hours and days. The device provides convenient optical access to the sample, as well as high mechanical and electrical stability due to off-resonance operation, showing a noise band as narrow as 1 mV. Furthermore, the acquisition of temperature-dependent SPV transients necessary for SPV-based deep-level transient spectroscopy becomes easily possible. Read More

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November 2018

Reentrant Phase Behavior in Protein Solutions Induced by Multivalent Salts: Strong Effect of Anions Cl Versus NO.

J Phys Chem B 2018 Nov 30. Epub 2018 Nov 30.

Institut für Angewandte Physik , Universität Tübingen , Auf der Morgenstelle 10 , 72076 Tübingen , Germany.

In this work, the effects of the two anions Cl and NO on the phase behavior of bovine serum albumin (BSA) in solution with trivalent salts are compared systematically. In the presence of trivalent metal salts, negatively charged proteins such as BSA in solution undergo a reentrant condensation (RC) phase behavior, which has been established for several proteins with chlorides of trivalent salts. Here, we show that replacing Cl by NO leads to a marked change in the phase behavior. Read More

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November 2018
2 Reads

Excitonic Aharonov-Bohm Oscillations in Core-Shell Nanowires.

Adv Mater 2018 Nov 20:e1805645. Epub 2018 Nov 20.

Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, 01069, Dresden, Germany.

Phase coherence in nanostructures is at the heart of a wide range of quantum effects such as Josephson oscillations between exciton-polariton condensates in microcavities, conductance quantization in 1D ballistic transport, or the optical (excitonic) Aharonov-Bohm effect in semiconductor quantum rings. These effects only occur in structures of the highest perfection. The 2D semiconductor heterostructures required for the observation of Aharonov-Bohm oscillations have proved to be particularly demanding, since interface roughness or alloy fluctuations cause a loss of the spatial phase coherence of excitons, and ultimately induce exciton localization. Read More

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November 2018
1 Read

Robot-assisted laser tissue soldering system.

Biomed Opt Express 2018 Nov 19;9(11):5635-5644. Epub 2018 Oct 19.

Department of Biomedical Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel.

Fast and reliable incision closure is critical in any surgical intervention. Common solutions are sutures and clips or adhesives, but they all present difficulties. These difficulties are especially pronounced in classical and robot-assisted minimally-invasive interventions. Read More

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November 2018
5 Reads

A Germacalicene: Synthesis, Structure and Reactivity Zhaowen Dong, Lena Albers, Marc Schmidtmann and Thomas Müller*[a].

Chemistry 2018 Nov 18. Epub 2018 Nov 18.

GERMANY.

The synthesis of germacalicene 7 from the reaction of dipotassium germole dianion K2[6] with 1,2-bis-diisopropylamino-3-chlorocyclopropenyl perchlorate is reported. Based on the crystal structure analysis and the results of DFT calculations, germacalicene 7 can be viewed as a cyclopropenium germacyclopentadienide ylid that is isoelectronic to α-cationic phosphanes. First reactivity studies revealed its nucleophilic character and resulted in the isolation of the air and moisture stable carbonyl iron 15 and the cationic silver complex 20. Read More

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November 2018
7 Reads

Quantitative Evaluation of Broadband Photoacoustic Spectroscopy in the Infrared with an Optical Parametric Oscillator.

Sensors (Basel) 2018 Nov 15;18(11). Epub 2018 Nov 15.

School of Engineering and Computing, University of the West of Scotland, High Street, Paisley PA1 2BE, UK.

We evaluate the spectral resolution and the detection thresholds achievable for a photoacoustic spectroscopy (PAS) system in the broadband infrared wavelength region 3270 n m ≲ λ ≲ 3530 n m driven by a continuous wave optical parametric oscillator (OPO) with P ¯ ≈ 1.26 W . The absorption spectra, I PAS ( λ i ) , for diluted propane, ethane and methane test gases at low concentrations ( c ∼ 100 ppm ) were measured for ∼1350 discrete wavelengths λ i . Read More

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November 2018
9 Reads

Fluctuations in the Emission Polarization and Spectrum in Single Chains of a Common Conjugated Polymer for Organic Photovoltaics.

Small 2018 Nov 16:e1804312. Epub 2018 Nov 16.

Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040, Regensburg, Germany.

Measuring the nanoscale organization of conjugated polymer chains used in organic photovoltaic (OPV) blends is vital if one wants to understand the materials. This is made very difficult with high efficiency OPV polymers such as PTB7 that form aggregates, as a lack of periodicity and a high degree of disorder make understanding of the nanoscale organization challenging. Here, single molecule spectroscopy is used to observe single chains and aggregates of PTB7. Read More

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November 2018

Spin in a Closed-Shell Organic Molecule on a Metal Substrate Generated by a Sigmatropic Reaction.

Angew Chem Int Ed Engl 2018 Nov 13. Epub 2018 Nov 13.

Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098, Kiel, Germany.

Inert metal surfaces present more chances of hosting organic intact radicals than other substrates, but large amounts of delocalized electronic states favor charge transfer and thus spin quenching. Lowering the molecule-substrate interaction is a usual strategy to stabilize radicals on surfaces. In some works, thin insulating layers were introduced to provide a controllable degree of electronic decoupling. Read More

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November 2018
8 Reads

Calcium stabilizes the strongest protein fold.

Nat Commun 2018 11 12;9(1):4764. Epub 2018 Nov 12.

Lehrstuhl für Angewandte Physik and Center for Nanoscience, Ludwig-Maximilians-University, Amalienstr. 54, 80799, Munich, Germany.

Staphylococcal pathogens adhere to their human targets with exceptional resilience to mechanical stress, some propagating force to the bacterium via small, Ig-like folds called B domains. We examine the mechanical stability of these folds using atomic force microscopy-based single-molecule force spectroscopy. The force required to unfold a single B domain is larger than 2 nN - the highest mechanostability of a protein to date by a large margin. Read More

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November 2018

[Robotic systems for care at home: A scoping review].

Z Evid Fortbild Qual Gesundhwes 2018 Nov 9;137-138:1-8. Epub 2018 Nov 9.

Universitätsklinikum Halle (Saale), Stabsstelle Pflegeforschung, Halle (Saale), Deutschland.

Background: In the future, modern technologies could make a significant contribution to a self-determined life in one's own environment when in need of care. Robots might alleviate everyday domestic life and promote participation. In the nursing science debate concerns have been raised over alienation through technology and loss of direct social and emotional contact. Read More

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November 2018

Genetic diversity and hybrid formation in Central European club-mosses (Diphasiastrum, Lycopodiaceae) - New insights from cp microsatellites, two nuclear markers and AFLP.

Mol Phylogenet Evol 2018 Nov 9;131:181-192. Epub 2018 Nov 9.

Lehrstuhl für Evolution und Biodiversität der Pflanzen, Ruhr-Universität Bochum, D-44780 Bochum, Germany.

In Europe, the genus Diphasiastrum (Lycopodiophyta) forms a reticulate network of six diploid taxa, including three parent species (D. alpinum, D. complanatum and D. Read More

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November 2018
3 Reads

Strong Purcell Effect on a Neutral Atom Trapped in an Open Fiber Cavity.

Phys Rev Lett 2018 Oct;121(17):173603

Institut für Angewandte Physik der Universität Bonn, Wegelerstrasse 8, D-53115 Bonn, Germany.

We observe a sixfold Purcell broadening of the D_{2} line of an optically trapped ^{87}Rb atom strongly coupled to a fiber cavity. Under external illumination by a near-resonant laser, up to 90% of the atom's fluorescence is emitted into the resonant cavity mode. The sub-Poissonian statistics of the cavity output and the Purcell enhancement of the atomic decay rate are confirmed by the observation of a strongly narrowed antibunching dip in the photon autocorrelation function. Read More

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October 2018

Low frequency vibrational anharmonicity and nuclear spin effects of Cl(H) and Cl(D).

J Chem Phys 2018 Nov;149(17):174310

Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.

Low frequency combination bands of Cl(H) and Cl(D) have been measured in the region between 600 and 1100 cm by infrared predissociation spectroscopy in a cryogenic 22-pole ion trap using a free electron laser at the FELIX Laboratory as a tunable light source. The Cl(H) (Cl(D)) spectrum contains three bands at 773 cm (620 cm), 889 cm (692 cm), and 978 cm (750 cm) with decreasing intensity toward higher photon energies. Comparison of the experimentally determined transition frequencies with anharmonic vibrational self-consistent field and vibrational configuration interaction calculations suggests the assignment of the combination bands v + v, 2v + v, and 3v + v for Cl(H) and 2v + v, 3v + v, and 4v + v for Cl(D), where v is the Cl⋯H stretching fundamental and v is the Cl(H) bend. Read More

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November 2018

Are electronic cigarettes a healthier alternative to conventional tobacco smoking?

Eur Arch Otorhinolaryngol 2018 Nov 3. Epub 2018 Nov 3.

Schleswig-Holstein University Hospital, Lübeck Campus, ENT Clinic, Lübeck, Germany.

Electronic cigarettes (EC) with and without nicotine are used by more and more consumers within the last decade. The long-term risks of vapor inhalation are unknown. This study should describe the state of the art of knowledge with respect to the following four items: (1) ingredients of the vapor and their potential risks, the influence of EC on smoking of combustible tobacco to (2) adults and (3) the youth, and (4) the side effects of passive vaping. Read More

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November 2018
5 Reads

Low-energy electron-induced decomposition of 5-trifluoromethanesulfonyl-uracil: A potential radiosensitizer.

J Chem Phys 2018 Oct;149(16):164307

Institut für Ionenphysik und Angewandte Physik and Center for Molecular Biosciences (CMBI), Leopold-Franzens Universität Innsbruck, Technikerstraße 25/3, 6020 Innsbruck, Austria.

5-trifluoromethanesulfonyl-uracil (OTfU), a recently proposed radiosensitizer, is decomposed in the gas-phase by attachment of low-energy electrons. OTfU is a derivative of uracil with a triflate (OTf) group at the C-position, which substantially increases its ability to undergo effective electron-induced dissociation. We report a rich assortment of fragments formed upon dissociative electron attachment (DEA), mostly by simple bond cleavages (e. Read More

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October 2018

Increasing Fracture Toughness and Transmittance of Transparent Ceramics using Functional Low-Thermal Expansion Coatings.

Sci Rep 2018 Oct 23;8(1):15644. Epub 2018 Oct 23.

Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK), 52425, Jülich, Germany.

Transparent polycrystalline ceramics have the potential to enable applications no other materials can, but to do so their strength and toughness must be improved. However, surface strengthening treatments like those used for glasses have so far remained elusive. Here for the first time, we report on engineering unprecedented surface compression, of the magnitude achieved for ion-exchange strengthened glasses (~750 MPa) in transparent ceramics. Read More

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October 2018

Tuning phase transitions of aqueous protein solutions by multivalent cations.

Phys Chem Chem Phys 2018 Oct;20(42):27214-27225

Institut für Angewandte Physik, Universität Tübingen, Auf der Morgenstelle 10, 72076 Tübingen, Germany.

In the presence of trivalent cations, negatively charged globular proteins show a rich phase behaviour including reentrant condensation, crystallisation, clustering and lower critical solution temperature metastable liquid-liquid phase separation (LCST-LLPS). Here, we present a systematic study on how different multivalent cations can be employed to tune the interactions and the associated phase behaviour of proteins. We focus our investigations on the protein bovine serum albumin (BSA) in the presence of HoCl3, LaCl3 and YCl3. Read More

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October 2018
6 Reads

Direction Matters: Monovalent Streptavidin/Biotin Complex under Load.

Nano Lett 2018 Oct 26. Epub 2018 Oct 26.

Lehrstuhl für Angewandte Physik and Center for NanoScience (CeNS) , Ludwig-Maximilians-Universität München , Amalienstrasse 54 , 80799 Munich , Germany.

Novel site-specific attachment strategies combined with improvements of computational resources enable new insights into the mechanics of the monovalent biotin/streptavidin complex under load and forced us to rethink the diversity of rupture forces reported in the literature. We discovered that the mechanical stability of this complex depends strongly on the geometry in which force is applied. By atomic force microscopy-based single molecule force spectroscopy we found unbinding of biotin to occur beyond 400 pN at force loading rates of 10 nN/s when monovalent streptavidin was tethered at its C-terminus. Read More

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October 2018

Space-borne Bose-Einstein condensation for precision interferometry.

Nature 2018 10 17;562(7727):391-395. Epub 2018 Oct 17.

Institute of Quantum Optics, QUEST-Leibniz Research School, Leibniz University Hannover, Hanover, Germany.

Owing to the low-gravity conditions in space, space-borne laboratories enable experiments with extended free-fall times. Because Bose-Einstein condensates have an extremely low expansion energy, space-borne atom interferometers based on Bose-Einstein condensation have the potential to have much greater sensitivity to inertial forces than do similar ground-based interferometers. On 23 January 2017, as part of the sounding-rocket mission MAIUS-1, we created Bose-Einstein condensates in space and conducted 110 experiments central to matter-wave interferometry, including laser cooling and trapping of atoms in the presence of the large accelerations experienced during launch. Read More

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October 2018
14 Reads

[Scientific development of critical care : Position paper].

Med Klin Intensivmed Notfmed 2018 11;113(8):672-675

, Hainstr. 7, 34621, Frielendorf, Deutschland.

Demographic changes in Germany means that nursing and medical care is becoming increasingly complex. This is especially true for intensive care. Despite the closure of hospitals in Germany, the number of beds in intensive care units rose between 2002 from 23,113 to 26,162 in 2010. Read More

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November 2018
2 Reads

[Health-Promoting Offers at Schools in the City and District of Würzburg].

Gesundheitswesen 2018 Dec 15;80(12):1057-1062. Epub 2018 Oct 15.

Fakultät Angewandte Sozialwissenschaften, Hochschule fur angewandte Wissenschaften Wurzburg-Schweinfurt, Würzburg.

The aim of the project was to gather information on existing and assess needs for health-promoting offers for pupils at general and vocational schools in the city and district of Wuerzburg (n=156) in order to derive recommendations for action. First, a qualitative document analysis of the homepages of all schools was performed, using a content-structuring content analysis. Based on the generated findings, a written questionnaire survey was conducted. Read More

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December 2018
3 Reads

Guest Editorial: Critical Thinking in Education and Research-Why and How?

Angew Chem Int Ed Engl 2018 Dec 15;57(51):16574-16575. Epub 2018 Oct 15.

Pharmazeutische Chemie und Wissenschaftsforschung, Departement Chemie und Angewandte Wissenschaften und Departement Geistes-, Sozial- und Staatswissenschaften, ETH Zürich, Switzerland.

"A responsible scientist is able to step back, critically reflect on his or her own doings, and also explain them to a wider audience. Critical thinking includes the ability to talk to people working in other areas, as well as the broader public. It has to be taught to students and fostered at the university level, and should be practiced in relation to one's own work …" Read more in the Guest Editorial. Read More

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December 2018
1 Read

A machine learning pipeline for internal anatomical landmark embedding based on a patient surface model.

Int J Comput Assist Radiol Surg 2018 Oct 13. Epub 2018 Oct 13.

Pattern Recognition Laboratory, Department of Computer Science, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstr. 3, 91058, Erlangen, Germany.

Purpose: With the recent introduction of fully assisting scanner technologies by Siemens Healthineers (Erlangen, Germany), a patient surface model was introduced to the diagnostic imaging device market. Such a patient representation can be used to automate and accelerate the clinical imaging workflow, manage patient dose, and provide navigation assistance for computed tomography diagnostic imaging. In addition to diagnostic imaging, a patient surface model has also tremendous potential to simplify interventional imaging. Read More

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October 2018
3 Reads

Molecular structure of the substrate-induced thin-film phase of tetracene.

J Chem Phys 2018 Oct;149(14):144701

Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany.

We present a combined experimental and theoretical study to solve the unit-cell and molecular arrangement of the tetracene thin film (TF) phase. TF phases, also known as substrate induced phases (SIPs), are polymorphs that exist at interfaces and decisively impact the functionality of organic thin films, e.g. Read More

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October 2018
9 Reads

Ionization of Ammonia Nanoices with Adsorbed Methanol Molecules.

J Phys Chem A 2018 Nov 19;122(43):8458-8468. Epub 2018 Oct 19.

J. Heyrovský Institute of Physical Chemistry , The Czech Academy of Sciences , Dolejškova 3 , 182 23 Prague , Czech Republic.

Large ammonia clusters represent a model system of ices that are omnipresent throughout the space. The interaction of ammonia ices with other hydrogen-boding molecules such as methanol or water and their behavior upon an ionization are thus relevant in the astrochemical context. In this study, ammonia clusters (NH) with the mean size N̅ ≈ 230 were prepared in molecular beams and passed through a pickup cell in which methanol molecules were adsorbed. Read More

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November 2018
4 Reads

Controlling the Morphology of Au-Pd Heterodimer Nanoparticles by Surface Ligands.

Inorg Chem 2018 Nov 5;57(21):13640-13652. Epub 2018 Oct 5.

Institut für Anorganische Chemie und Analytische Chemie , Johannes Gutenberg-Universität , Duesbergweg 10-14 , 55128 Mainz , Germany.

Controlling the morphology of noble-metal nanoparticles is mandatory to tune specific properties such as catalytic and optical behavior. Heterodimers consisting of two noble metals have been synthesized, so far mostly in aqueous media using selective surfactants or chemical etching strategies. We report a facile synthesis for Au@Pd and Pd@Au heterodimer nanoparticles (NPs) with morphologies ranging from segregated domains (heteroparticles) to core-shell structures by applying a seed-mediated growth process with Au and Pd seed nanoparticles in 1-octadecene (ODE), which is a high-boiling organic solvent. Read More

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November 2018
14 Reads

Infrared multiple photon dissociation of cesium iodide clusters doped with mono-, di- and triglycine.

Eur J Mass Spectrom (Chichester) 2018 Oct 4:1469066718803307. Epub 2018 Oct 4.

Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria.

Charged cesium iodide clusters doped with mono-, di- and triglycine serve as a model system for sea salt aerosols containing biological molecules. Here, we investigate reactions of these complexes under infrared irradiation, with spectra obtained by infrared multiple photon dissociation. The cluster ions are generated via electrospray ionization and analyzed in the cell of a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer. Read More

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October 2018
1 Read

Intraoperative mapping of the sensory cortex by time-resolved thermal imaging.

Biomed Tech (Berl) 2018 Oct;63(5):567-572

Klinik und Poliklinik für Neurochirurgie, Universitätsklinikum Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.

The resection of brain tumor requires a precise distinction between eloquent areas of the brain and pathological tumor tissue in order to improve the extent of resection as well as the patient's progression free survival time. In this study, we discuss mathematical tools necessary to recognize neural activity using thermal imaging cameras. The main contribution to thermal radiation of the exposed human cortex is regional cerebral blood flow (CBF). Read More

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October 2018
5 Reads

[Temporary arthrodesis of the knee in two-stage septic prosthesis exchange : In vitro analysis of adhesion of Staphylococcus aureus on steel and carbon fiber rods].

Orthopade 2018 Sep 28. Epub 2018 Sep 28.

Chirurgische Klinik und Poliklinik, BG Universitätsklinikum Bergmannsheil Bochum, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Deutschland.

Background: In two-stage septic revision arthroplasty of the knee, a temporary intramedullary fixation with an antibiotic-containing polymethyl methacrylate (PMMA) spacer is often performed in cases of extensive bone defects after endoprosthesis explantation. A common method is the use of conventional steel or carbon fiber rods, which are connected via a tube-to-tube connector and finally reinforced near the joint with bone cement.

Objective: As the surface of foreign materials plays a critical role in the colonization and biofilm formation in the treatment of periprosthetic joint infections (PJI), the steel and carbon fiber rods were examined and compared with respect to bacterial surface adhesions. Read More

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September 2018

Influence of Regioselectively Sulfated Cellulose on in Vitro Vascularization of Biomimetic Bone Matrices.

Biomacromolecules 2018 Nov 9;19(11):4228-4238. Epub 2018 Oct 9.

German Cancer Research Center (DKFZ) , Clinical Cooperation Unit Applied Tumor Immunology , Im Neuenheimer Feld 280 , 69120 Heidelberg , Germany.

Vascularization is essential for the regeneration of bone tissue within composite material. We measured the effect of regioselectively modified cellulose/hemicellulose as an additive for porous scaffolds of collagen/hydroxyapatite nanocomposite on the tubule formation of human vascular endothelial cells. Using a coculture of endothelial cells and fibroblasts, endothelial cells formed a network of tubules within an incubation time of 14 to 24 days. Read More

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November 2018
15 Reads

Rotational 'cooling' and 'heating' of OH(Σ) by collisions with He: quantum dynamics revealing propensity rules under ion trap conditions.

Mol Phys 2018 6;116(19-20):2686-2697. Epub 2018 Mar 6.

Institut für Ionenphysik und Angewandte Physik, Universitaet Innsbruck, Innsbruck, Austria.

Multichannel scattering calculations are presented for the low-energy collisions of the OH cation and He atoms, using an evaluation of the interaction potential, which had been obtained in earlier work, and a time-independent, multichannel treatment of the quantum dynamics carried out in this study using our in-house scattering code ASPIN. Given the presence of spin-rotation coupling effects, within an essentially electrostatic formulation of the interaction forces with He atoms in the trap, the ensuing propensity rules which control the relative size of the state-changing cross sections and of the corresponding inelastic rates, also computed at the most likely temperatures in an ion trap, are presented and analysed in detail. Read More

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Collisional relaxation kinetics for ortho and para NH under photodetachment in cold ion traps.

Faraday Discuss 2018 Sep 20. Epub 2018 Sep 20.

Institut für Ionenphysik und Angewandte Physik Universität Innsbruck, Technikerstraße 25/3, A-6020 Innsbruck, Austria.

The collisional cooling of the internal rotational states of the nonlinear anion NH2- (1A1), occurring at the low temperature of a cold ion trap under helium buffer gas cooling, is examined via quantum dynamics calculations and ion decay rate measurements. The calculations employ a novel ab initio potential energy surface that describes the interaction anisotropy and range of action between the molecular anions and the neutral He atoms. The state changing integral cross sections are employed to obtain the state-to-state rate coefficients, separately for the ortho- and the para-NH2- ions. Read More

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September 2018
8 Reads

Low-temperature nanospectroscopy of the structural ferroelectric phases in single-crystalline barium titanate.

Nanoscale 2018 Sep;10(37):18074-18079

Institut für Angewandte Physik, Technische Universität Dresden, Nöthnitzer Str. 61, D-01187 Dresden, Germany.

We optically investigate the local-scale ferroelectric domain structure of tetragonal, orthorhombic, and rhombohedral barium titanate (BTO) single crystals using scattering-type scanning near-field infrared (IR) optical microscopy (s-SNIM) at temperatures down to 150 K. Thanks to the precisely tunable narrow-band free-electron laser FELBE, we are able to explore the spectral fingerprints and IR resonances of these three phases and their domain orientations in the optical IR near-field. More clearly, every structural phase is analyzed with respect to its near-field resonances close to a wavelength of 17 μm when exploring the (111)-oriented BTO sample surface. Read More

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September 2018
1 Read

Single-electron charge sensing in self-assembled quantum dots.

Sci Rep 2018 Sep 18;8(1):13188. Epub 2018 Sep 18.

The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan.

Measuring single-electron charge is one of the most fundamental quantum technologies. Charge sensing, which is an ingredient for the measurement of single spins or single photons, has been already developed for semiconductor gate-defined quantum dots, leading to intensive studies on the physics and the applications of single-electron charge, single-electron spin and photon-electron quantum interface. However, the technology has not yet been realized for self-assembled quantum dots despite their fascinating transport phenomena and outstanding optical functionalities. Read More

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September 2018

Photodetachment spectroscopy of cold trapped near threshold.

J Chem Phys 2018 Sep;149(10):104302

Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, 6020 Innsbruck, Austria.

We have studied photodetachment of the amidogen anion as a function of photon energy near the detachment threshold. The detachment spectrum is obtained over the energy range of 6190-6355 cm from the loss rate of the anions from a cryogenic radiofrequency multipole ion trap. By modeling all accessible rotational state-to-state photodetachment transitions, we can assign rotational state-specific thresholds to the measured spectrum. Read More

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September 2018
2 Reads

[Hyperhidrosis-aetiopathogenesis, diagnosis, clinical symptoms and treatment].

Authors:
J Wohlrab B Kreft

Hautarzt 2018 Oct;69(10):857-869

Universitätsklinik und Poliklinik für Dermatologie und Venerologie, Martin-Luther-Universität Halle-Wittenberg, Ernst-Grube-Str. 40, 06097, Halle (Saale), Deutschland.

Although primary hyperhidrosis is a common disease, secondary symptomatic hyperhidrosis is rather rare. Primary hyperhidrosis is a complex neuropathic dysregulation with a genetic predisposition and is diagnosed when patients show pathologic sweating patterns and excessive sweating for at least 6 months and fulfill at least four of the following criteria: affected areas are axillae and/or palms and/or soles and/or forehead; symmetry; no night sweating; at least once a week; onset before the age of 25; positive family history; negative impact on daily activities. Frequently used therapies are topical aluminum salts and anticholinergics, iontophoresis in water, and intracutaneous botulinum toxin. Read More

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October 2018