bluuebunny/crossref_metadata_2025 huggingface dataset:
Investigating the AGN activity and black hole masses in low surface brightness galaxies
Authors: Subramanian Smitha , Sethuram Ramya , Das Mousumi , George Koshy , Thirupathi Sivarani , Prabhu Tushar P.
Published: March 2016

We present an analysis of the optical nuclear spectra from the active galactic nuclei (AGN) in a sample of giant low surface brightness (GLSB) galaxies. GLSB galaxies are extreme late type spirals that are large, isolated and poorly evolved compared to regular spiral galaxies. Earlier studies have indicated that their nuclei have relatively low mass black holes. Using data from the Sloan Digital Sky Survey (SDSS), we selected a sample of 30 GLSB galaxies that showed broad Hα emission lines in their AGN spectra. In some galaxies such as UGC 6284, the broad component of Hα is more related to outflows rather than the black hole. One galaxy (UGC 6614) showed two broad components in Hα, one associated with the black hole and the other associated with an outflow event. We derived the nuclear black hole (BH) masses of 29 galaxies from their broad Hα parameters. We find that the nuclear BH masses lie in the range 105 – 107 M⊙. The bulge stellar velocity dispersion σe was determined from the underlying stellar spectra. We compared our results with the existing BH mass - velocity dispersion (MBH–σe) correlations and found that the majority of our sample lie in the low BH mass regime and below the MBH–σe correlation. The effects of galaxy orientation in the measurement of σe and the increase of σe due to the effects of bar are probable reasons for the observed offset for some galaxies, but in many galaxies the offset is real. A possible explanation for the MBH–σe offset could be lack of mergers and accretion events in the history of these galaxies which leads to a lack of BH-bulge co-evolution.
Tidal disruption as a probe for supermassive black hole binaries
Authors: Li Shuo , Liu Fukun , Berczik Peter , Spurzem Rainer
Published: March 2016

Supermassive black hole binaries (SMBHBs) are the products of frequent galaxy mergers. It is very hard to be detected in quiescent galaxy. By using one million particle direct N-body simulations on special many-core hardware (GPU cluster), we study the dynamical co-evolution of SMBHB and its surrounding stars, specially focusing on the evolution of stellar tidal disruption event (TDE) rates before and after the coalescence of the SMBHB. We find a boosted TDE rate during the merger of the galaxies. After the coalescence of two supermassive black holes (SMBHs), the post-merger SMBH can get a kick velocity due to the anisotropic GW radiations. Our results about the recoiling SMBH, which oscillates around galactic center, show that most of TDEs are contributed by unbound stars when the SMBH passing through galactic center. In addition, the TDE light curve in SMBHB system is significantly different from the curve for single SMBH, which can be used to identify the SMBHB.
A search of new samples of active galactic nuclei with low-mass black holes from SDSS
Authors: Liu H. , Yuan W. , Zhou H. , Dong X.-B.
Published: March 2016

We report on the progress of our on-going work to search for low-mass black holes (LMBHs) in active galactic nuclei. The masses of black holes are estimated using the broad line width and luminosity obtained from one-epoch optical spectra. As the first step, we fitted the spectra of 1263 objects in the quasar catalog of the SDSS DR10 and obtained accurate measurement of the emission lines. Two AGNs are found to have MBH ~ 106 M⊙. The next step is to analyze the spectra of the DR10 galaxy sample, from which a much larger sample of low-mass AGNs is expected to be obtained.
The effect of gaseous accretion disk on dynamics of the stellar cluster in AGN
Authors: Shukirgaliyev Bekdaulet
Published: March 2016

There is a supermassive black hole, a gaseous accretion disk and compact star cluster in the center of active galactic nuclei, as known today. So the activity of AGN can be represented as the result of interaction of these three subsystems. In this work we investigate the dynamical interaction of a central star cluster surrounding a supermassive black hole and a central accretion disk. The dissipative force acting on stars in the disk leads to an asymmetry in the phase space distribution of the central star cluster due to the rotating accretion disk. In our work we present some results of Stardisk model, where we see some changes in density and phase space of central star cluster due to influence of rotating gaseous accretion disk.
Eddington capture sphere around luminous relativistic stars
Authors: Wielgus Maciek
Published: March 2016

We discuss the interplay of gravity and radiation in a static, spherically symmetric spacetime. Because of the spacetime curvature, balance between radiation pressure from spherical star and effective force of gravity may be established in a particular distance from the star surface, on so-called Eddington capture sphere. This is in contrast with the Newtonian scenario, for which Eddington luminosity of the radiation assures gravity-radiation balance at any radius. We explore properties of this relativistic equilibrium and the dynamics of test particles under radiation influence in the strong gravity regime.
Intermediate-mass black holes in globular clusters: observations and simulations
Authors: Lützgendorf Nora , Kissler-Patig Markus , Gebhardt Karl , Baumgardt Holger , Kruijssen Diederik , Noyola Eva , Neumayer Nadine , de Zeeuw Tim , Feldmeier Anja , van der Helm Edwin , Pelupessy Inti , Zwart Simon Portegies
Published: March 2016

The study of intermediate-mass black holes (IMBHs) is a young and promising field of research. If IMBHs exist, they could explain the rapid growth of supermassive black holes by acting as seeds in the early stage of galaxy formation. Formed by runaway collisions of massive stars in young and dense stellar clusters, intermediate-mass black holes could still be present in the centers of globular clusters, today. Our group investigated the presence of intermediate-mass black holes for a sample of 10 Galactic globular clusters. We measured the inner kinematic profiles with integral-field spectroscopy and determined masses or upper limits of central black holes in each cluster. In combination with literature data we further studied the positions of our results on known black-hole scaling relations (such asM•− σ) and found a similar but flatter correlation for IMBHs. Applying cluster evolution codes, the change in the slope could be explained with the stellar mass loss occurring in clusters in a tidal field over its life time. Furthermore, we present results from several numerical simulations on the topic of IMBHs and integral field units (IFUs). We ranN-body simulations of globular clusters containing IMBHs in a tidal field and studied their effects on mass-loss rates and remnant fractions and showed that an IMBH in the center prevents core collapse and ejects massive objects more rapidly. These simulations were further used to simulate IFU data cubes. For the specific case of NGC 6388 we simulated two different IFU techniques and found that velocity dispersion measurements from individual velocities are strongly biased towards lower values due to blends of neighboring stars and background light. In addition, we use the Astrophysical Multipurpose Software Environment (AMUSE) to combine gravitational physics, stellar evolution and hydrodynamics to simulate the accretion of stellar winds onto a black hole.
On the uniqueness of kinematical signatures of intermediate-mass black holes in globular clusters
Authors: Zocchi Alice , Gieles Mark , Hénault-Brunet Vincent
Published: March 2016

Finding an intermediate-mass black hole (IMBH) in a globular cluster (GC), or proving its absence, is a crucial ingredient in our understanding of galaxy formation and evolution. The challenge is to identify a unique signature of an IMBH that cannot be accounted for by other processes. Observational claims of IMBH detection are often based on analyses of the kinematics of stars, such as a rise in the velocity dispersion profile towards the centre. In this contribution we discuss the degeneracy between this IMBH signal and pressure anisotropy in the GC. We show that that by considering anisotropic models it is possible to partially explain the innermost shape of the projected velocity dispersion profile, even though models that do not account for an IMBH do not exhibit a cusp in the centre.
Searching for intermediate mass black holes: understanding the data first
Authors: Bianchini Paolo , Norris Mark , van de Ven Glenn , Schinnerer Eva
Published: March 2016

The detection of intermediate mass black holes (IMBHs) in globular clusters has been hotly debated, with different observational methods delivering different outcomes for the same object. In order to understand these discrepancies, we construct detailed mock integral field spectroscopy (IFU) observations of globular clusters, starting from realistic Monte Carlo cluster simulations. The output is a data cube of spectra in a given field-of-view that can be analyzed in the same manner as real observations and compared to other (resolved) kinematic measurement methods. We show that the main discrepancies arise because the luminosity-weighted IFU observations can be strongly biased by the presence of a few bright stars that introduce a scatter in velocity dispersion measurements of several km s−1. We show that this intrinsic scatter can prevent a sound assessment of the central kinematics, and therefore should be fully taken into account to correctly interpret the signature of an IMBH.
Dynamical modeling of the Arches cluster using Fokker-Planck calculations
Authors: Lee Joowon , Shin Jihye
Published: March 2016

The Arches cluster is a young, compact, and massive star cluster located in ~30pc away from the Galactic Center in projection. The cluster is located in the extreme environment of the Galactic Center, making it an excellent target for understanding the effects of star-forming environment on the mass function of star clusters. In this study, we estimate the initial condition (mass, concentration parameter, and galactocentric radius) of the Arches cluster by comparing Fokker-Planck calculations with observed velocity dispersion, surface density and mass function data.
The coupling of a disk corona and a jet for the radio/X-ray correlation in black hole X-ray binaries
Authors: Qiao Erlin
Published: March 2016

We interpret the radio/X-ray correlation of LR ∝ LX~1.4 for LX/LEdd ≳ 10−3 with a detailed disk corona-jet model, in which the accretion flow and the jet are connected by a parameter, η, describing the fraction of the matter in the accretion flow ejected outward to form the jet. We calculate LR and LX at different Ṁ, adjusting η to fit the observed radio/X-ray correlation of the black hole X-ray transient H1743-322 for LX/LEdd > 10−3. It is found that the value of η for this radio/X-ray correlation for LX/LEdd > 10−3, is systematically less than that of the case for LX/LEdd < 10−3, which is consistent with the general idea that the jet is often relatively suppressed at the high luminosity phase in black hole X-ray binaries.
Acceleration of hybrid MPI parallel NBODY6++ for largeN-body globular cluster simulations
Authors: Wang Long , Spurzem Rainer , Aarseth Sverre , Nitadori Keigo , Berczik Peter , Kouwenhoven M.B.N. , Naab Thorsten
Published: March 2016

Previous research on globular clusters (GCs) dynamics is mostly based on semi-analytic, Fokker-Planck, Monte-Carlo methods and on directN-body (NB) simulations. These works have great advantages but also limits since GCs are massive and compact and close encounters and binaries play very important roles in their dynamics. The former three methods make approximations and assumptions, while expensive computing time and number of stars limit the latter method. The current largest direct NB simulation has ~ 500k stars (Heggie 2014). Here, we accelerate the direct NB code NBODY6++ (which extends NBODY6 to supercomputers by using MPI) with new parallel computing technologies (GPU, OpenMP + SSE/AVX). Our aim is to handle largeN(up to 106) direct NB simulations to obtain better understanding of the dynamical evolution of GCs.
White dwarf binaries and the gravitational wave foreground
Authors: Benacquista Matthew
Published: March 2016

Galactic white dwarf binaries will be an abundant source of gravitational waves in the mHz frequency band of space-based detectors such as eLISA. A few thousand to a few tens of thousands of these systems will be individually resolvable by eLISA, depending on the final detector configuration. The remaining tens of millions of close white dwarf binaries will create an unresolvable anisotropic foreground of gravitational waves that will be comparable to the instrument noise of eLISA at frequencies below about a mHz. Both the resolvable binaries and the foreground can be used to better understand this population. Careful choice of the initial orientation of eLISA can mitigate this foreground in searches for other sources.
Microglial P2Y12 is necessary for synaptic plasticity in mouse visual cortex
Authors: Sipe G. O. , Lowery, R. L. , Tremblay M-È , Kelly E. A. , Lamantia C. E. , Majewska A. K.
Published: March 2016

Microglia are the resident immune cells of the brain. Increasingly, they are recognized as important mediators of normal neurophysiology, particularly during early development. Here we demonstrate that microglia are critical for ocular dominance plasticity. During the visual critical period, closure of one eye elicits changes in the structure and function of connections underlying binocular responses of neurons in the visual cortex. We find that microglia respond to monocular deprivation during the critical period, altering their morphology, motility and phagocytic behaviour as well as interactions with synapses. To explore the underlying mechanism, we focused on the P2Y12 purinergic receptor, which is selectively expressed in non-activated microglia and mediates process motility during early injury responses. We find that disrupting this receptor alters the microglial response to monocular deprivation and abrogates ocular dominance plasticity. These results suggest that microglia actively contribute to experience-dependent plasticity in the adolescent brain.
Transgenic mice overexpressing nesfatin/nucleobindin-2 are susceptible to high-fat diet-induced obesity
Authors: Shimizu H , Tanaka M , Osaki A
Published: March 2016

Background:

Nesfatin/Nucleobindin-2 (Nesf/NUCB2), a precursor of nesfatin-1, an anorexigenic protein, is ubiquitously expressed in peripheral tissues in addition to the hypothalamus. However, the role of intracellular Nesf/NUCB2 has not been established in the periphery.

Methods:

Nesf/NUCB2-transgenic (Tg) mice were generated, and chronological changes of body weight and daily food intake were measured in Nesf/NUCB2-Tg mice fed normal laboratory chow or 45% high-fat diet (HFD). In addition, changes of metabolic markers were evaluated in those mice.

Results:

No differences were observed in daily food intake and body weight between Nesf/NUCB2-Tg mice (n=11) and their non-Tg littermates (n=11) fed normal chow. Nesf/NUCB2-Tg mice showed increased mRNA expression of oxytocin and corticotropin-releasing hormone and decreased mRNA expression of cocaine- and amphetamine-related transcript in the hypothalamus. Nesf/NUCB2-Tg mice fed 45% HFD (n=6) showed significantly higher increase in body weight than their non-Tg littermates fed the same diet (n=8); however, no difference was observed in daily food intake between these two groups. Further, Nesf/NUCB2-Tg mice fed 45% HFD showed a significant increase in the weight of the liver, subcutaneous fat, and brown adipose tissue and decrease in the expression of uncoupling protein-1 in the subcutaneous fat. Blood glucose levels of Nesf/NUCB2-Tg mice fed 45% HFD were not different from those of their non-Tg littermates fed the same diet. Insulin levels of these Tg mice were significantly higher than those of their non-Tg littermates. Histological analysis showed marked fat deposition in the hepatocytes surrounding the hepatic central veins in Nesf/NUCB2-Tg mice fed 45% HFD.

Conclusions:

Overexpression of Nesf/NUCB2 did not change food intake, but increased body weight only in Nesf/NUCB2-Tg mice fed HFD. The results of this study indicate that Nesf/NUCB2 was involved in the development of insulin resistance and fat deposition in the liver, independent of the modulation of energy intake.
An accuracy measurement method for star trackers based on direct astronomic observation
Authors: Sun Ting , Xing Fei , Wang Xiaochu , You Zheng , Chu Daping
Published: March 2016

Star tracker is one of the most promising optical attitude measurement devices and it is widely used in spacecraft for its high accuracy. However, how to realize and verify such an accuracy remains a crucial but unsolved issue until now. The authenticity of the accuracy measurement method of a star tracker will eventually determine the satellite performance. A new and robust accuracy measurement method for a star tracker based on the direct astronomical observation is proposed here. In comparison with the conventional method with simulated stars, this method utilizes real navigation stars as observation targets which makes the measurement results more authoritative and authentic. Transformations between different coordinate systems are conducted on the account of the precision movements of the Earth and the error curves of directional vectors are obtained along the three axes. Based on error analysis and accuracy definitions, a three-axis accuracy evaluation criterion has been proposed in this paper, which could determine pointing and rolling accuracy of a star tracker directly. Experimental measurements confirm that this method is effective and convenient to implement. Such a measurement environment is close to the in-orbit conditions and it can satisfy the stringent requirement for high-accuracy star trackers.
Spatial distribution and source apportionment of PFASs in surface sediments from five lake regions, China
Authors: Qi Yanjie , Huo Shouliang , Xi Beidou , Hu Shibin , Zhang Jingtian , He Zhuoshi
Published: March 2016

Perfluoroalkyl substances (PFASs) have been found in environment globally. However, studies on PFAS occurrence in sediments of lakes or reservoirs remain relatively scarce. In this study, two hundred and sixty-two surface sediment samples were collected from forty-eight lakes and two reservoirs all over China. Average PFAS concentrations in surface sediments from each lake or reservoir varied from 0.086 ng/g dw to 5.79 ng/g dw with an average of 1.15 ng/g dw. Among five lake regions, average PFAS concentrations for the lakes from Eastern Plain Region were the highest. Perfluorooctanoic acid, perfluoroundecanoic acid and perfluorooctane sulfonic acid (PFOS) were the predominant PFASs in surface sediments. The significant positive correlations between PFAS concentrations and total organic carbon, total nitrogen and total phosphorus contents in sediments revealed the influences of sedimentary characteristics on PFAS occurrence. A two-dimensional hierarchical cluster analysis heat map was depicted to analyze the possible origins of sediments and individual PFAS. The food-packaging, textile, electroplating, firefighting and semiconductor industry emission sources and the precious metals and coating industry emission sources were identified as the main sources by two receptor models, with contributions of 77.7 and 22.3% to the total concentrations of C4-C14- perfluoroalkyl carboxylic acids and PFOS, respectively.
Compact Feeding Network for Array Radiations of Spoof Surface Plasmon Polaritons
Authors: Xu Jun Jun , Yin Jia Yuan , Zhang Hao Chi , Cui Tie Jun
Published: March 2016

We propose a splitter feeding network for array radiations of spoof surface plasmon polaritons (SPPs), which are guided by ultrathin corrugated metallic strips. Based on the coupled mode theory, SPP fields along a single waveguide in a certain frequency range can be readily coupled into two adjacent branch waveguides with the same propagation constants. We propose to load U-shaped particles anti-symmetrically at the ends of such two branch waveguides, showing a high integration degree of the feeding network. By controlling linear phase modulations produced by the U-shaped particle chain, we demonstrate theoretically and experimentally that the SPP fields based on bound modes can be efficiently radiated to far fields in broadside direction. The proposed method shows that the symmetry of electromagnetic field modes can be exploited to the SPP transmission network, providing potential solutions to compact power dividers and combiners for microwave and optical devices and systems.
Components of Metabolic Syndrome and the Risk of Disability among the Elderly Population
Authors: Liaw Fang-Yih , Kao Tung-Wei , Wu Li-Wei , Wang Chung-Ching , Yang Hui-Fang , Peng Tao-Chun , Sun Yu-Shan , Chang Yaw-Wen , Chen Wei-Liang
Published: March 2016

The direct relationship between metabolic syndrome (MetS) and function disability has not been established. The aim of the present study was to investigate the relationship between MetS and functional disability in the elderly. This retrospective observational study included 1,778 participants aged 60–84 years from the National Health and Nutrition Examination Survey (1999–2002). Impairments in activities of daily living (ADL), instrumental activities of daily living (IADL), leisure and social activities (LSA), lower extremity mobility (LEM), and general physical activities (GPA) were assessed. Additionally, the associations between the features of MetS and disability were evaluated. MetS was associated with a high prevalence of functional dependence in ADL, IADL, LSA, LEM, and GPA. After adjusting for potential confounders, a high number of MetS components was found to be associated with increased disability (P = 0.002). Additionally, associations were observed between MetS components, including abdominal obesity and high triglycerides levels, and functional dependence in ADL, IADL, LSA, LEM, and GPA (all, P < 0.05). A linear increase in disability might be associated with the number of MetS components in an elderly population. Additionally, MetS abnormalities, particularly abdominal obesity and high triglycerides levels, might be highly predictive of functional dependence in the elderly.
Emergence of a novel bovine spongiform encephalopathy (BSE) prion from an atypical H-type BSE
Authors: Masujin Kentaro , Okada Hiroyuki , Miyazawa Kohtaro , Matsuura Yuichi , Imamura Morikazu , Iwamaru Yoshifumi , Murayama Yuichi , Yokoyama Takashi
Published: March 2016

The H-type of atypical bovine spongiform encephalopathy (H-BSE) was serially passaged in bovinized transgenic (TgBoPrP) mice. At the fourth passage, most challenged mice showed a typical H-BSE phenotype with incubation periods of 223 ± 7.8 days. However, a different phenotype of BSE prion with shorter incubation periods of 109 ± 4 days emerged in a minor subset of the inoculated mice. The latter showed distinct clinical signs, brain pathology and abnormal prion protein profiles as compared to H-BSE and other known BSE strains in mice. This novel prion was transmitted intracerebrally to cattle, with incubation periods of 14.8 ± 1.5 months, with phenotypes that differed from those of other bovine prion strains. These data suggest that intraspecies transmission of H-BSE in cattle allows the emergence of a novel BSE strain. Therefore, the continuation of feed ban programs may be necessary to exclude the recycling of H-BSE prions, which appear to arise spontaneously, in livestock. Such measures should help to reduce the risks from both novel and known strains of BSE.
Full-scale computation for all the thermoelectric property parameters of half-Heusler compounds
Authors: Hong A. J. , Li L. , He R. , Gong J. J. , Yan Z. B. , Wang K. F. , Liu J. -M. , Ren Z. F.
Published: March 2016

The thermoelectric performance of materials relies substantially on the band structures that determine the electronic and phononic transports, while the transport behaviors compete and counter-act for the power factor PF and figure-of-merit ZT. These issues make a full-scale computation of the whole set of thermoelectric parameters particularly attractive, while a calculation scheme of the electronic and phononic contributions to thermal conductivity remains yet challenging. In this work, we present a full-scale computation scheme based on the first-principles calculations by choosing a set of doped half-Heusler compounds as examples for illustration. The electronic structure is computed using the WIEN2k code and the carrier relaxation times for electrons and holes are calculated using the Bardeen and Shockley’s deformation potential (DP) theory. The finite-temperature electronic transport is evaluated within the framework of Boltzmann transport theory. In sequence, the density functional perturbation combined with the quasi-harmonic approximation and the Klemens’ equation is implemented for calculating the lattice thermal conductivity of carrier-doped thermoelectric materials such as Ti-doped NbFeSb compounds without losing a generality. The calculated results show good agreement with experimental data. The present methodology represents an effective and powerful approach to calculate the whole set of thermoelectric properties for thermoelectric materials.
Luminescent ZnO quantum dots as an efficient sensor for free chlorine detection in water
Authors: Singh Kulvinder , Mehta S. K.
Published: March 2016

Highly luminescent ZnO quantum dots (QDs) synthesizedviaa simple and facile route are used for the preparation of an optical sensor for the detection of free chlorine.
Development and validation of a reversed phase liquid chromatographic method with fluorescence detection for the pharmacokinetic study of a new chimeric peptide
Authors: Zhang Xiaoyun , Chen Ying , Li Lin , Qiao Hua , Wang Rui , Ni Jingman , You Jieqiong , Ma Kaikai , Fan Chenchen , Fang Quan
Published: March 2016

HPLC-FLD was validated and employed in the pharmacokinetic study of FITC-BN-9 in rats.
Molecular degradation of D35 and K77 sensitizers when exposed to temperatures exceeding 100 °C investigated by photoelectron spectroscopy
Authors: Oscarsson Johan , Fredin Kristofer , Ahmadi Sareh , Eriksson Anna I. K. , Johansson Erik M. J. , Rensmo Håkan
Published: March 2016

PES measurements on heat-treated D35 electrodes show that the binding configuration changes and K77 dissociates and desorbs from the surface.
Unexpected formation of 4,4-dimethyl-1,2-disubstituted-dicarbonyl cyclopentanes from ketone enolate anions and 1,3-diiodo-2,2-dimethylpropane
Authors: Barrionuevo Cecilia A. , Schmidt Luciana C. , Argüello Juan E.
Published: March 2016

Novel access to 1,2-dicarbonyl cyclopentane compounds by tandem dimerization–cyclization reactions under transition-metal-free conditions.
Colloidosome like structures: self-assembly of silica microrods
Authors: Datskos P. , Polizos G. , Bhandari M. , Cullen D. A. , Sharma J.
Published: March 2016

Self-assembly of micron-sized silica rods is demonstrated using a Pickering emulsion based strategy.
Temperature dependent, shape variant synthesis of photoluminescent and biocompatible carbon nanostructures from almond husk for applications in dye removal
Authors: Tripathi Kumud Malika , Tyagi Ankit , Ashfaq Mohammad , Gupta Raju Kumar
Published: March 2016

The effect of the carbonization temperature on the morphology and properties of synthesized water soluble photoluminescent carbon nanostructures from almond husks have been investigated.
From substituent effects to applications: enhancing the optical response of a four-component assembly for reporting ee values
Authors: Lin Chung-Yon , Giuliano Michael W. , Ellis Bryan D. , Miller Scott J. , Anslyn Eric V.
Published: March 2016

Substituent effect studies were conducted on a dynamic chiral alcohol sensor, leading to a new sensor with lower errors.
Masking effect of copper oxides photodeposited on titanium dioxide: exploring UV, visible, and solar light activity
Authors: Siah Wai Ruu , Lintang Hendrik O. , Shamsuddin Mustaffa , Yoshida Hisao , Yuliati Leny
Published: March 2016

UV, visible, and solar light activations gave different optimum loadings of CuO due to the different masking effects of CuO photodeposited on TiO2.
Oxidative dehydrogenation of propane to propylene over VOx/CaO–γ-Al2O3 using lattice oxygen
Authors: Ayandiran Afees A. , Bakare Idris A. , Binous Housam , Al-Ghamdi Sameer , Razzak Shaikh A. , Hossain Mohammad M.
Published: March 2016

Oxidative dehydrogenation (ODH) of propane to propylene is studied using a new vanadium catalyst supported on CaO–γ-Al2O3 under a gas phase oxygen free atmosphere.
Pharmaceuticals and personal care products (PPCPs) in urban and suburban rivers of Beijing, China: occurrence, source apportionment and potential ecological risk
Authors: Dai Guohua , Wang Bin , Fu Chaochen , Dong Rui , Huang Jun , Deng Shubo , Wang Yujue , Yu Gang
Published: March 2016

This study analyzed 15 pharmaceuticals and personal care products (PPCPs) in two rivers with different urbanization levels in the surrounding watershed (urban and suburb) in Beijing, China.
Applications of oxazolidinones as chiral auxiliaries in the asymmetric alkylation reaction applied to total synthesis
Authors: Heravi Majid M. , Zadsirjan Vahideh , Farajpour Behnaz
Published: March 2016

In this review, a number of applications of chiral oxazolidinones in the asymmetric alkylation reaction applied to total synthesis are described.
Synthesis of a hierarchical BiOBr nanodots/Bi2WO6 p–n heterostructure with enhanced photoinduced electric and photocatalytic degradation performance
Authors: Hu Jinshan , An Weijia , Wang Huan , Geng Jinpeng , Cui Wenquan , Zhan Yong
Published: March 2016

Three-dimensional composites of flower-like Bi2WO6 decorated with BiOBr nanodots (designated BiOBr nanodots/Bi2WO6) with varying BiOBr content have been prepared by a simple method.
Understanding the mechanism of hydrogenated NiCo2O4 nanograss supported on Ni foam for enhanced-performance supercapacitors
Authors: Sun D. S. , Li Y. H. , Wang Z. Y. , Cheng X. P. , Jaffer S. , Zhang Y. F.
Published: March 2016

The hydrogenated electrodes exhibited superior comprehensive electrochemical performance compared with the pristine pattern (air-annealed). The prominent electrochemical capacitive properties of hydrogenated NiCo2O4 are attributed to the enhancement in the electrical conductivity.
Croconaines as molecular materials for organic electronics: synthesis, solid state structure and use in transistor devices
Authors: Punzi A. , Capozzi M. A. M. , Fino V. , Carlucci C. , Suriano M. , Mesto E. , Schingaro E. , Orgiu E. , Bonacchi S. , Leydecker T. , Samorì P. , Musio R. , Farinola G. M.
Published: March 2016

Indolenine-based croconaines are synthesized, their structure and solid state organization are investigated together with their electronic properties in thin-film transistors.
Zwischen Zustimmung und Verriss
Authors: König Romy
Published: March 2016

Die Bund-Länder-Arbeitsgruppe hat am 5. Dezember ein Eckpunktepapier für die Krankenhausreform vorgestellt. Das Echo auf die Reformvorschläge fiel erwartungsgemäß völlig unterschiedlich aus. kma hat die wichtigsten Stimmen gesammelt.
Qualität braucht Menge
Authors: Rybak Christian
Published: March 2016

Die Diskussion um Mindestmengen als Voraussetzung für Qualität hat durch Entscheidungen des Bundessozialgerichts neue Nahrung erhalten.
Ende eines Geschäftsmodells
Authors: Mau Jens
Published: March 2016

Das südlich von Hamburg gelegene kleine Krankenhaus Salzhausen mit zuletzt 47 Betten war über Jahre hinweg das bundesweit einzige in Besitz einer Genossenschaft.
Nicht nur über Geld reden
Authors: Gaede Kirsten
Published: March 2016

Die Deutsche Krankenhausgesellschaft gilt vielen als verknöchert und finanzfixiert. Das möchte der neue Präsident ändern. Thomas Reumann wünscht sich Volksnähe und einen Blick für moderne Versorgungsstrukturen.
Von schlechtem Qualitätsmanagement und fehlenden Kontrollen
Authors: Kucera Martin
Published: March 2016

Die Defizite der Sterilgutversorgung in deutschen Krankenhäusern lassen sich nicht so einfach auf einen Nenner bringen. Klar ist aber, dass etwas schiefläuft, wenn verschmutztes OP-Besteck aus der Sterilisation zurück in den OP gelangt.
Wiederbelebung per Videokonferenz
Authors: Rüffer Michael
Published: March 2016

Der zunehmende Ausbau von Windkraftanlagen fernab der Küste beschert Notärzten ein neues Problem. Weil eine Rettung innerhalb üblicher Fristen nicht möglich ist, wollen nun Ärzte der Charité und des Unfallkrankenhauses Berlin per Telemedizin Erste Hilfe leisten.
„Chronische Leiden ins Zentrum rücken“
Authors: Gaede Kirsten
Published: March 2016

Wann immer in den Nullerjahren über Patientensicherheit diskutiert wurde, war er dabei: Matthias Schrappe. Dann zog sich der Internist einige Jahre zurück. Nun schaltet er sich wieder ein. Auf dem Gesundheitskongress des Westens debattiert er mit AOK-Vorstand Uwe Deh und GBA-Frau Regina Klakow-Franck über das neue Qualitätsinstitut.
OP abgebrannt und kaum ein Minus
Authors: Hohnstein Aileen
Published: March 2016

Wer am Sinn von Verbünden noch immer zweifelt, den müsste das Beispiel der Kliniken Ostallgäu-Kaufbeuren endgültig überzeugen.
Ziemlich beste Feinde
Authors: Paquet Robert
Published: March 2016

Der MDK hat gerade sein 25-jähriges Jubiläum gefeiert. Ausgerechnet zu der Zeit, da auch die Schlichtungsstellen eingerichtet wurden. Da liegt es nahe, das angespannte Verhältnis zwischen MDK und Kliniken zu rekapitulieren und zu fragen: Wird der Streit nie aufhören?
Optische Quantensprünge
Authors: Kucera Martin
Published: March 2016

Die technischen Fortschritte in Sachen Auflösung von Videobildern sind immens. Auch im Krankenhaus hat die HD-Technik die Bildgebung revolutioniert, schließlich liefert eine höhere Auflösung den Ärzten deutlich schärfere Aufnahmen. Das gilt auch für die Endoskopie.
„Es bewegt sich was“
Authors: Zehnder Adalbert
Published: March 2016

Lünendonk-Geschäftsführer Jörg Hossenfelder befasst sich seit vielen Jahren mit dem vielen nicht-medizinischen Services, ohne die das medizinische Kerngeschäft nicht funktionieren würde. Ein kma-Interview zu Lage und Aussichten – und zur Auswahl des richtigen Partners.
Der Senkrechtstarter
Authors: Zehnder Adalbert
Published: March 2016

Mit 32 war er Professor. Mit 35 wurde er Direktor eines der größten gesundheitsökonomischen Forschungszentren in Deutschland. Seit Jahresbeginn sitzt er, mit 38, im Sachverständigenrat der Bundesregierung: der Hamburger Wirtschaftswissenschaftler Jonas Schreyögg.
Die Netzwerke sprießen
Authors: Zehnder Adalbert
Published: March 2016

Sie können sich unter Krankenhäusern alleine abspielen oder sektorenübergreifend sein, manche sind medizinisch, andere unternehmerisch motiviert: Die zahlreichen Netzwerke, die in jüngster Zeit auf dem Gesundheitsmarkt entstanden sind – und entstehen –, haben vielerlei Gesichter.
„Investoren sind auch was für Kommunale“
Authors: Gaede Kirsten
Published: March 2016

Investoren einzubinden, muss für Krankenhausträger nicht immer Selbstaufgabe bedeuten. Sie können die Finanzexperten als Inspirationsquelle nutzen oder als Anteilseigner mit Minderheitsbeteiligung, meint Investment-Experte Friedrich von Bohlen.
Kliniken im Dilemma
Authors: Hohnstein Aileen
Published: March 2016

In Deutschland suchen immer mehr Flüchtlinge Schutz. Das macht sich auch in Krankenhäusern bemerkbar. Sie wollen helfen, aber oft bleiben sie auf den Behandlungskosten sitzen.
So wichtig und doch kaum möglich
Authors: Hohnstein Aileen
Published: March 2016

Flüchtlinge haben Verlust, Verfolgung und für Mitteleuropäer kaum vorstellbare Grausamkeiten erlebt. Deshalb leiden die meisten unter psychischen Erkrankungen. Doch gerade diese können deutsche Ärzte wegen Sprachbarrieren kaum behandeln.
Junge Ärzte ticken anders
Authors: Brinkmann Jesaja , Nohl-Deryk Pascal
Published: March 2016

Allzu oft stemmen sich Ärzte und ihre Interessenvertreter gegen technische Errungenschaften. Mit der Lebenswirklichkeit hat das wenig zu tun – diese Meinung ist unter jungen angehenden Ärzten weit verbreitet. kma bat zwei Medizinstudenten stellvertretend für ihre Generation, die Kritik näher zu erläutern.
Rohes Ei mit Potenzialen
Authors: Ekkernkamp Axel
Published: March 2016

Die Germanwings-Katastrophe wirft ein Schlaglicht auf einen der wichtigsten konsentierten ärztlichen Grundsätze: In Ermangelung besserer Vorschläge wird von manchen Politikern und Medien die Lockerung der ärztlichen Schweigepflicht gefordert. Dabei rückt auch das verwandte Thema Datenschutz in den Fokus; im Gesundheitswesen und speziell im Krankenhausbereich kommen die Manager nicht umhin, sich damit zu befassen.
Manager begrüßen Qualitätsdebatte
Authors: Mau Jens
Published: March 2016

Fast die Hälfte der Befragten konnte 2014 ihre Planvorgaben nicht einhalten.
Neue Munition für CIOs
Authors: Mau Jens
Published: March 2016

Wenn in der Klinik Grabenkämpfe um neues Personal oder Investitionen anstehen, haben IT-Leiter oft schlechte Karten. Sie können ihre Kostenstruktur nur grob darstellen, und das überzeugt die Klinikgeschäftsführung oft nicht. Die beiden IT-Leiter Udo Purwin (Lukaskrankenhaus Neuss) und Ralf Boldt (Klinikum Oldenburg) wollen das ändern. Sie haben einen Verein gegründet, der Bausteine für die IT-Leistungsverrechnung entwickeln soll. „Im Mittelpunkt steht die Intention, die Leistungen der IT transparent und sichtbar zu machen, um somit eine einheitliche Perspektive auf Kosten, Leistungen und Nutzen der IT herzustellen. Ziel ist die Verbesserung des Ressourceneinsatzes sowie die Erhöhung der Kundenzufriedenheit“, erklärt Purwin, der Erster Vorsitzender des neuen Vereins „IT-Leistungsgruppen“ (ITLG) ist. Eine Leistungsgruppe könnte beispielsweise die Einrichtung eines Standarddruckers oder die Einrichtung eins LAN-Ports sein.
„Unser Ziel: Ein Kümmerer für jede Klinik“
Authors: König Romy
Published: March 2016

In 6 von 16 Bundesländern ist es Krankenhäusern gesetzlich vorgeschrieben, einen Patientenfürsprecher zu bestellen. Das ist Detlef Schliffke, Patientenfürsprecher am Katholischen Klinikum Essen, zu wenig. Deshalb hat er jetzt den „Bundesverband der Patientenfürsprecher in Krankenhäusern (BPiK)“ gegründet – ein Verein, der sich unter anderem dafür einsetzen will, dass die Position des Patientenbeauftragten gestärkt und flächendeckend durchgesetzt wird.
Der Radiologe als Informationsbroker
Authors: Kucera Martin
Published: March 2016

Mitte Mai findet der 96. Deutsche Röntgenkongress in Hamburg statt. Gerhard Adam, der Kongresspräsident und Direktor der Klinik für Diagnostische und Interventionelle Radiologie des UKE, sprach mit kma über technische Neuentwicklungen und die Rolle des Radiologen in der deutschen Kliniklandschaft.
Der Inn kühlt das Klinikum Rosenheim
Authors: Thalmayr Maria
Published: March 2016

Ein unerschöpfliches Reservoir an Kälte floss bis vor Kurzem ungenutzt am Klinikum Rosenheim vorbei. Der Inn transportiert das in Krankenhäusern begehrte und in immer größeren Mengen verbrauchte Gut seit jeher verschwenderisch aus den Bergen in die Donau. Einen winzig kleinen Teil davon zwackt die oberbayerische Klinik für sich ab.
Dieser Promi-Faktor sucht in der Branche seinesgleichen
Authors: Mau Jens
Published: March 2016

Wie groß die Strahlkraft des Hauptstadtkongresses in der Gesundheitsszene ist, zeigt sein Line-up: Jeder der amtierenden Bundesgesundheitsminister hat in den vergangenen 17 Jahren auf dem Kongress gesprochen.
Gestählt durch 30 Jahre Erfahrung
Authors: Gaede Kirsten
Published: March 2016

Als Chef des IQTIG muss Christof Veit sich auf viel Kritik und Widerstand einstellen. Doch zermalmen wird das Räderwerk der Selbstverwaltung ihn wohl nicht. Weggefährten sind überzeugt: Der Mann hat Mut, Ausdauer und methodischen Tiefgang.
Mittler zwischen Patienten und Klinikpersonal
Authors: König Romy
Published: March 2016

Der kürzlich gegründete Bundesverband Beschwerdemanagement für Gesundheitseinrichtungen (BBFG) versteht sich als Interessenvertretung der in Kliniken beschäftigten Beschwerdemanager. Ein kma-Interview mit Oliver Gondolatsch, dem 1. Vorsitzenden des Vereins.
Breßlein reagiert auf Lohmanns Kritik
Authors: Doelfs Guntram
Published: March 2016

Nachdem Gesundheitsexperte Heinz Lohmann auf dem Hauptstadtkongress erneut die Daseinsbereichtigung öffentlicher Krankenhäuser in Frage stellte, hat Susann Breßlein umgehend Lohmanns Kritik zurückgewiesen.
„Frische, ehrliche Küche”
Authors: König Romy
Published: March 2016

Es ist vor allem das Essen, was nach einem Krankenhausaufenthalt in Erinnerung bleibt. Kliniken sind daher kritisch, wenn es um die externe Speisenversorgung ihrer Patienten geht. Trotzdem lassen sich Dienstleister einiges einfallen, um Einrichtungen von ihren Leistungen zu überzeugen.
Von regional bis halal
Authors: Hohnstein Aileen
Published: March 2016

Immer mehr Kliniken kochen die Speisen für ihre Patienten nicht mehr in hauseigenen Küchen. Externe Dienstleister müssen sich dennoch bemühen, den kritischen Anforderungen nach gesundem Essen zu genügen. Ihre Bandbreite an angebotenen Menüs ist daher sehr groß.
Mechanismen wiederholen sich
Authors: Ekkernkamp Axel
Published: March 2016

Auch bei noch so positiver Betrachtung muss eingeräumt werden, dass die Arbeitsbedingungen von Krankenpflegekräften nicht immer und überall im zentralen Fokus des Klinikmanagements standen.
Gut oder schlecht? Fragen Sie Ihre Patienten
Authors: Meißner Winfried , Weinmann Claudia
Published: March 2016

Fast die Hälfte (40 Prozent) aller Patienten sind unzufrieden mit der Schmerztherapie im Krankenhaus. Das muss nicht sein. Mit dem „Quips“-Fragebogen der Universitätsklinik Jena können Kliniken herausfinden, woran es bei ihnen genau hapert und wie sie ihre Behandlung verbessern können.
Bedroh(n)ungsszenario
Authors: Thalmayr Maria
Published: March 2016

Anstelle von Rettungsfahrzeugen sollen künftig Drohnen Blutkonserven aus dem Frankfurter Markus-Krankenhaus an zwei weitere Klinikstandorte des Agaplesion-Konzerns in der Mainmetropole transportieren. Das spare wertvolle Zeit und beuge Unfällen vor, argumentiert Klinikleiter Dennis Göbel. Die Gerüchteküche brodelt.
Angenehm dynamisch
Authors: Hohnstein Aileen
Published: March 2016

Das Herzzentrum Leipzig gilt als eines der führenden weltweit. Wer ein solches Haus leitet, braucht Biss. Den besitzt Diana Lohmann. Bei der Helios-Frau ist dieser idealerweise mit einer Portion Demut gepaart.
Krankenhäuser sind die netteren Kunden
Authors: König Romy
Published: March 2016

Mehr als drei Jahre nach dem Kauf des Dienstleisters Schubert will das FM-Unternehmen Wisag nun den Klinikmarkt erobern. Es geht um Cross-Selling, um Paketverkäufe, vor allem aber: um neue Marktanteile.
Sensibilität ist gefragt
Authors: Arnecke Kirsten , Rase Birgit
Published: March 2016

Die Finanzsituation vieler Krankenhäuser verschlechtert sich immer weiter. Unbezahlte Rechnungen von Patienten belasten daher zusätzlich die Liquidität. Ein effektives Forderungsmanagement kann die Finanzsituation nachhaltig verbessern – ohne die Beziehung zu den Patienten zu belasten.
Da Vinci „Made in Spain”
Authors: König Romy
Published: March 2016

Spanische Entwickler rütteln am Da-Vinci-Monopol: In Andalusien arbeiten Wissenschaftler und Techniker an einem Konkurrenzmodell, das handlicher sein soll als der amerikanische OP-Roboter und vor allem: günstiger. Jetzt gibt es den ersten Prototypen. Deutsche Da-Vinci-Anwender werden hellhörig.
Den Hackern keine Chance geben
Authors: Kucera Martin
Published: March 2016

Die IT im Krankenhaus ist heute zunehmend vernetzt – angefangen bei den Anwendungen zur Behandlungsdokumentation über Inventar- und Bestellsysteme bis hin zu medizintechnischen Geräten. Das erleichtert zwar die Arbeit, birgt aber auch große Sicherheitsrisiken.
Kieferprothese aus dem Drucker
Authors: Kucera Martin
Published: March 2016

Am 29. September veranstaltet der Industrieverband Spectaris zusammen mit dem Fraunhofer Institut für Produktionstechnik und Automatisierung (IPA) in Mannheim das Forum „3D-Druck in der Medizintechnik“. Wir haben im Vorfeld mit Markus Safaricz über das Potenzial der jungen Technologie gesprochen.
Das passende Gerät finden
Authors: Thalmayr Maria
Published: March 2016

Mit dem Wettbewerblichen Dialog bietet das EU-Vergaberecht ein interessantes Ausschreibungsverfahren für komplexe Medizingeräte. Indem man das Leistungsprofil mithilfe der Anbieter entwickelt, bekommt man am Ende sicher das passende Gerät.
Zeit, sich wieder auf die Prioritäten zu besinnen
Authors: Ekkernkamp Axel
Published: March 2016

Die Sommerferien entschleunigen den Alltag. Das gilt auch für die so häufig überhitzt geführten Diskussionen zu Gesetzen, Verordnungen oder über die regelmäßig als nicht ausreichend empfundene Förderung.
Konfessionelle Elefantenhochzeit in Berlin?
Authors: Gaede Kirsten
Published: March 2016

In Berlin bahnt sich möglichweise eine Elefantenhochzeit unter evangelischen Krankenhausträgern an. Die Paul Gerhardt Diakonie und das Evangelische Johannesstift führen derzeit offenbar Gespräche über eine Fusion. Dies erfuhr kma aus gut unterrichteten Kreisen. Die beiden konfessionellen Gesundheitsunternehmen betreiben neun Krankenhäuser in der Hauptstadt und in der Berliner Umgebung.
Gut für Qualität und Kodierung
Authors: Hohnstein Aileen
Published: March 2016

Diabetes ist eine Volkskrankheit. Trotzdem übersehen Klinikärzte sie häufig. Mit einem Zertifikat der Deutschen Diabetes Gesellschaft lässt sich dies ändern – zum Wohle der Patienten und des Krankenhauses.
Spot an für den Klinikmanager
Authors: Gaede Kirsten
Published: March 2016

Olympus möchte den Nerv der Klinikmanager treffen und verabschiedet sich vom klassischen Verkäufer. In Deutschland sollen rund 60 neue Mitarbeiter hinzukommen, bevorzugt mit BWL-Kenntnissen und Klinikerfahrung. Außerdem erweitert der Konzern sein Portfolio über sein Kernprodukt, die endoskopischen Geräte, hinaus.
Flaute bei den Russen
Authors: Zehnder Adalbert
Published: March 2016

Eineinhalb Jahre lang betrieben die Uniklinik Freiburg und das zu ihr gehörende Universitäts-Herzzentrum Freiburg-Bad Krozingen im 100 Kilometer nördlicher gelegenen mondänen Kurort Baden-Baden eine eigene Repräsentanz.
Neue Pillen – per Gesetz in den Müll
Authors: Zehnder Adalbert
Published: March 2016

Allein im Bundesland Nordrhein-Westfalen werden jährlich Medikamente aus stationären Hospizen im Marktwert von 850.000 Euro vernichtet, obwohl sie weiterverwendet werden könnten.
„P4P sehe ich eher kritisch”
Authors: Gaede Kirsten
Published: March 2016

Die Dokumentation wird für Kliniken aufwendiger, wenn Pay for Performance (Qualitätszuschläge und -abschläge) tatsächlich kommt, prophezeit GBA-Frau Regina Klakow-Franck. Auch Qualitätsberichte werden künftig mit mehr Arbeit verbunden sein. Bei der Mindestmengenregelung müssen sich Krankenhäuser ebenfalls auf strengere Anforderungen einstellen.
Offen für Neues
Authors: König Romy
Published: March 2016

Hunderttausende Menschen flüchten derzeit vor Krieg und Terror nach Deutschland. Wie es funktionieren kann, Flüchtlingen einen Weg in die Berufswelt zu ebnen, zeigt die RoMed-Klinik Wasserburg am Inn. Sie stellte einen jungen Afrikaner aus Mali als Pflegepraktikanten ein, lernte ihn behutsam an. Nun wird er zum Pfleger ausgebildet.
Mit IT offensiver umgehen
Authors: Ekkernkamp Axel
Published: March 2016

Nach meinen Besuchen bei Google in Zürich und Microsoft in Redmond/Seattle bin ich fest davon überzeugt, dass Diskussionen über die grundsätzliche Bedeutung von IT im Krankenhaus und den Widerstreit zwischen digitaler Welt und Datenschutz endlich zugunsten einer umfassenden Krankenhaus-IT-Strategie beendet werden sollten. Schließlich wollen wir bei Themen wie Big Data oder E-Health nicht den Anschluss verlieren.
„Das ist kein gewöhnlicher KIS-Wechsel”
Authors: Mau Jens
Published: March 2016

Der Krankenhauskonzern Asklepios will zwischen 25 und 50 Prozent Anteile am Münchener KIS-Hersteller Meierhofer erwerben. Im Gegenzug bekommt Meierhofer den Zuschlag für den KIS-Betrieb an den sieben Hamburger Asklepios-Kliniken. Im Interview beschreibt Matthias Meierhofer, welche Tragweite das Geschäft hat.