Refine
Has Fulltext
- yes (96) (remove)
Year of publication
- 2014 (96) (remove)
Document Type
- Postprint (96) (remove)
Language
- English (96) (remove)
Is part of the Bibliography
- yes (96) (remove)
Keywords
- anomalous diffusion (5)
- living cells (4)
- Cardiac rehabilitation (2)
- RPA (2)
- acquisition (2)
- ancient DNA (2)
- arsenolipids present (2)
- behavior (2)
- cod-liver (2)
- damage (2)
- dynamics (2)
- english (2)
- fatty-acids (2)
- identification (2)
- infection pathway (2)
- membrane (2)
- models (2)
- nonergodicity (2)
- physiological consequences (2)
- prevention (2)
- random-walks (2)
- reduction (2)
- single-particle tracking (2)
- stress (2)
- transport (2)
- ventral striatum (2)
- visible-light (2)
- 3D geovisualization (1)
- 47A52 (1)
- 65R20 (1)
- 65R32 (1)
- 78A46 (1)
- American-english (1)
- Ankarana (1)
- Bayesian (1)
- Behavior (1)
- C-center (1)
- China (1)
- Chiroptera (1)
- Context (1)
- DNA origami (1)
- DNA radiation damage (1)
- DNA sensor (1)
- Demonstrative Clefts (1)
- Duplication Event (1)
- Dynamics (1)
- Fokker-Planck equations (1)
- Fredholm complexes (1)
- G quadruplexes (1)
- GABA (1)
- Hide Markov Model (1)
- Holocene (1)
- IHE attack (1)
- Interactional Linguistics (1)
- Kinase Family (1)
- Last Glacial Maximum (1)
- Lefschetz number (1)
- Madagascar (1)
- Method (1)
- Moa (1)
- Movements (1)
- Normalization procedures (1)
- PCR (1)
- Participant Orientation (1)
- Plasmodium falciparum (1)
- Precise Point Positioning (1)
- Projection (1)
- RP-HPLC (1)
- Recombinase polymerase amplification (1)
- Regional varieties (1)
- SLI (1)
- Segmental Duplication (1)
- Speakers (1)
- Speech Rhythm and Rhythmic Analysis (1)
- Speech motor control (1)
- Tandem Duplication (1)
- TiO2 nanoparticles (1)
- Tongue (1)
- Turn-Constructional Units (1)
- absorbtion fine-structure (1)
- accelerometer records (1)
- acceptors (1)
- acinar-cells (1)
- acquisition norms (1)
- adaptation to climate change (1)
- adduct formation (1)
- adenoassociated virus (1)
- aerosol size distribution (1)
- age (1)
- aldehyde oxidoreductase (1)
- ancestry (1)
- animacy (1)
- anticancer drug (1)
- assimilation (1)
- atomic force microscopy (1)
- attachment (1)
- attitudes (1)
- augmented-wave method (1)
- balance training (1)
- baseline shift (1)
- benzaldehyde (1)
- betaine (1)
- bilingual children (1)
- bioanalysis (1)
- biochemical profiles (1)
- biosensor (1)
- bladder-cancer (1)
- body composition (1)
- bodybuilding (1)
- brownian-motion (1)
- cambridge cb4 0wf (1)
- cambs (1)
- canopy effect (1)
- carcinogen exposure (1)
- categories (1)
- cell-death (1)
- cellulose (1)
- central Mongolia (1)
- central administration (1)
- characteristics (1)
- chemoradiation therapy (1)
- chromatin accessibility (1)
- chromoionophore (1)
- chronic kidney disease (1)
- climate extremes (1)
- coarticulatory resistance (1)
- cockroach salivary-glands (1)
- coefficient (1)
- coefficients (1)
- coexistence (1)
- community structure (1)
- complex words (1)
- complexity (1)
- composites (1)
- confluence (1)
- confocal raman microscopy (1)
- congeneric species (1)
- constraints (1)
- construction (1)
- contrast agents (1)
- control rates (1)
- copolymers (1)
- cytoplasm (1)
- cytosine methylation (1)
- death-threats (1)
- degradation (1)
- dependencies (1)
- depressive symptoms (1)
- derivation (1)
- development (1)
- diimine-complexes (1)
- dimensional (1)
- distributed systems (1)
- dna coiling (1)
- dog growth (1)
- doping attitude (1)
- doping tests (1)
- drought (1)
- drugs (1)
- dry deciduous forest (1)
- dynamics simulation (1)
- dyslipidemia (1)
- electrolytes (1)
- electron-transfer (1)
- electropolymerisation (1)
- elliptic complexes (1)
- emotional status (1)
- endosomal escape (1)
- energy intake (1)
- england (1)
- enzyme reactions (1)
- epsilon-caprolactone (1)
- equation approach (1)
- escence correlation spectroscopy (1)
- escherichia-coli (1)
- ethnicity (1)
- europium (1)
- evaluation (1)
- events (1)
- excision-repair (1)
- excitation (1)
- excluded volume (1)
- exposure (1)
- extraction (1)
- fMRI (1)
- farmers (1)
- fault slip (1)
- fire emissions (1)
- fish (1)
- flight search patterns (1)
- flood risk (1)
- floral meristem (1)
- floral organ (1)
- flower development (1)
- fluctuation-dissipation theorem (1)
- fluorescence photobleaching recovery (1)
- fluoroimmunoassay (1)
- folding kinetics (1)
- forelimb (1)
- forest (1)
- fractional dynamics (1)
- fractional dynamics approach (1)
- frameworks (1)
- functional capacity (1)
- gas-phase (1)
- gene expression (1)
- gene-expression (1)
- gene-regulation kinetics (1)
- genomic dna methylation (1)
- geodetic measurements (1)
- gestural coordination (1)
- global vegetation model (1)
- glomerular filtration rate (1)
- grain size (1)
- grammar (1)
- grammars (1)
- graph-transformations (1)
- graphite (1)
- greek children (1)
- green (1)
- growth regulate factor (1)
- hazard (1)
- hela-cells (1)
- high-rate GPS (1)
- higher education (1)
- homozygosity (1)
- human impact (1)
- human-cells (1)
- hydrogen (1)
- image-based representation (1)
- implicit attitude test (IAT) (1)
- in-vitro (1)
- indefinite articles (1)
- indicators (1)
- indirect test (1)
- induced malignant-transformation (1)
- inflected words (1)
- information (1)
- initio molecular-dynamics (1)
- instability resistance training (1)
- integral equation (1)
- intelligence (1)
- intermittent chaotic systems (1)
- intervention (1)
- intracellular na+ (1)
- intracellular-transport (1)
- inverse ill-posed problem (1)
- inverse scattering (1)
- ion optodes (1)
- ionic strength (1)
- ionophore (1)
- isothermal amplification (1)
- isothermal nucleic acid amplification (1)
- iterative regularization (1)
- labels (1)
- labor market policies (1)
- lactase-persistence (1)
- lake eutrophication (1)
- langevin equation (1)
- language (1)
- lanthanide luminescence (1)
- laser remote sensing (1)
- late bilinguals (1)
- lateral flow (1)
- leaking (1)
- lech catchment (1)
- level-replacement systems (1)
- levy flights (1)
- lexical abilities (1)
- lifetime microscopy (1)
- lipids (1)
- low-dimensional models (1)
- low-energy electrons (1)
- magnetic fields (1)
- manganese (1)
- marine oils (1)
- masked priming (1)
- mass-spectrometry (1)
- maturation (1)
- mechanical-properties (1)
- membrane channel (1)
- membranes (1)
- mental lexicon (1)
- metabolites (1)
- methodology (1)
- methylmercury (1)
- methyltransferases dnmt3a (1)
- microchip (1)
- microporous organic polymers (1)
- migration (1)
- milton rd (1)
- ministers and civil servants (1)
- mitigation behavior (1)
- mixtures (1)
- model (1)
- molecular rods (1)
- molecular-mechanisms (1)
- molecularly imprinted polymers (1)
- monetary incentive delay task (1)
- monomer (1)
- monte-carlo (1)
- motivation (1)
- motor performance (1)
- movement (1)
- nanoclusters (1)
- neurodegenerative diseases (1)
- neurotoxicity (1)
- nonlinear dynamical systems (1)
- normally developing-children (1)
- oil (1)
- orthographic overlap (1)
- osmotic-pressure (1)
- oxidation (1)
- participles (1)
- patterns (1)
- people (1)
- periplaneta-americana (1)
- photon-counting statistics (1)
- photooxidation (1)
- physical fitness test (1)
- pigmentation (1)
- point-of-care (1)
- point-of-care testing (1)
- political advisers (1)
- political responsiveness (1)
- politicization (1)
- pollen (1)
- pollen mapping (1)
- poly(ADP-ribose) polymerase-1 (1)
- polyampholyte (1)
- polymerization (1)
- polyzwitterion (1)
- positive selection (1)
- post-polymerization modification (1)
- posttranslational protein translocation (1)
- prediction error signal (1)
- preschool-children (1)
- primary school (1)
- private households (1)
- productivity (1)
- programs (1)
- protein binding (1)
- psychology (1)
- public administration (1)
- quantum dots (1)
- rampage (1)
- rapid test (1)
- rat (1)
- reactivity (1)
- readers (1)
- redox polymer (1)
- registry (1)
- regularity (1)
- reinforcement learning (1)
- repair (1)
- representation (1)
- resonance energy-transfer (1)
- resonant formation (1)
- review (1)
- reward system (1)
- ring-opening polymerization (1)
- risk factor (1)
- risk perceptions (1)
- royal soc chemistry (1)
- rp-hplc (1)
- samples (1)
- sat (1)
- scenarios (1)
- school attack (1)
- school shooting (1)
- science park (1)
- scientific use file (1)
- sensors (1)
- sentences (1)
- sequence (1)
- service-oriented architecture (1)
- shear layers (1)
- simulations (1)
- single-molecule analysis (1)
- single-strand breaks (1)
- single-stranded-dna (1)
- skills (1)
- skin (1)
- sodium green (1)
- software reference architecture (1)
- solid-state nanopores (1)
- solver (1)
- sorption (1)
- spatial data infrastructure (1)
- spatial-organization (1)
- speaking children (1)
- standardization (1)
- stannous octoate (1)
- stars: early-type (1)
- stars: individual (HD 164492C, CPD –57 ◦ 3509, HD 54879, β CMa, ε CMa) (1)
- stars: magnetic fields (1)
- steroid use (1)
- stress drop (1)
- stretch-shortening cycle (1)
- structural-characterization (1)
- structured polynucleotides (1)
- subdiffusion (1)
- supported gold (1)
- surface (1)
- surgical aortic valve replacement (sAVR) (1)
- survey data (1)
- switches (1)
- synchronization (1)
- synthesis (1)
- system (1)
- systems (1)
- tamoxifen (1)
- tbx5 (1)
- thimerosal (1)
- thio-dimethylarsinic acid (1)
- thomas graham house (1)
- tight integration (1)
- tight-binding (1)
- time random-walks (1)
- trafficking (1)
- transcatheter aortic valve implantation (TAVI) (1)
- transition (1)
- trivalent (1)
- uncertainty (1)
- vegetation degradation (1)
- vegetation expansion (1)
- ventricular myocytes (1)
- violence in schools (1)
- vitamin A (1)
- vitro toxicological characterization (1)
- vulnerability (1)
- water (1)
- weak ergodicity breaking (1)
- word categories (1)
- youth (1)
- zinc (1)
- zwitterionic group (1)
Institute
- Institut für Chemie (32)
- Mathematisch-Naturwissenschaftliche Fakultät (17)
- Humanwissenschaftliche Fakultät (14)
- Institut für Biochemie und Biologie (9)
- Institut für Physik und Astronomie (6)
- Department Sport- und Gesundheitswissenschaften (4)
- Institut für Anglistik und Amerikanistik (4)
- Philosophische Fakultät (3)
- Wirtschafts- und Sozialwissenschaftliche Fakultät (2)
- Extern (1)
The toxicologically most relevant mercury (Hg) species for human exposure is methylmercury (MeHg). Thiomersal is a common preservative used in some vaccine formulations. The aim of this study is to get further mechanistic insight into the yet not fully understood neurotoxic modes of action of organic Hg species. Mercury species investigated include MeHgCl and thiomersal. Additionally HgCl2 was studied, since in the brain mercuric Hg can be formed by dealkylation of the organic species. As a cellular system astrocytes were used. In vivo astrocytes provide the environment necessary for neuronal function. In the present study, cytotoxic effects of the respective mercuricals increased with rising alkylation level and correlated with their cellular bioavailability. Further experiments revealed for all species at subcytotoxic concentrations no induction of DNA strand breaks, whereas all species massively increased H2O2-induced DNA strand breaks. This co- genotoxic effect is likely due to a disturbance of the cellular DNA damage response. Thus, at nanomolar, sub-cytotoxic concentrations, all three mercury species strongly disturbed poly(ADP-ribosyl)ation, a signalling reaction induced by DNA strand breaks. Interestingly, the molecular mechanism behind this inhibition seems to be different for the species. Since chronic PARP-1 inhibition is also discussed to sacrifice neurogenesis and learning abilities, further experiments on neurons and in vivo studies could be helpful to clarify whether the inhibition of poly(ADP-ribosyl) ation contributes to organic Hg induced neurotoxicity.
This study investigates the spatial and temporal distributions of 14 key arboreal taxa and their driving forces during the last 22,000 calendar years before ad 1950 (kyr BP) using a taxonomically harmonized and temporally standardized fossil pollen dataset with a 500-year resolution from the eastern part of continental Asia. Logistic regression was used to estimate pollen abundance thresholds for vegetation occurrence (presence or dominance), based on modern pollen data and present ranges of 14 taxa in China. Our investigation reveals marked changes in spatial and temporal distributions of the major arboreal taxa. The thermophilous (Castanea, Castanopsis, Cyclobalanopsis, Fagus, Pterocarya) and eurythermal (Juglans, Quercus, Tilia, Ulmus) broadleaved tree taxa were restricted to the current tropical or subtropical areas of China during the Last Glacial Maximum (LGM) and spread northward since c. 14.5 kyr BP. Betula and conifer taxa (Abies, Picea, Pinus), in contrast, retained a wider distribution during the LGM and showed no distinct expansion direction during the Late Glacial. Since the late mid-Holocene, the abundance but not the spatial extent of most trees decreased. The changes in spatial and temporal distributions for the 14 taxa are a reflection of climate changes, in particular monsoonal moisture, and, in the late Holocene, human impact. The post-LGM expansion patterns in eastern continental China seem to be different from those reported for Europe and North America, for example, the westward spread for eurythermal broadleaved taxa.
Herein, we report the chain-growth tin-free room temperature polymerization method to synthesize n-type perylene diimide-dithiophene-based conjugated polymers (PPDIT2s) suitable for solar cell and transistor applications. The palladium/electron-rich tri-tert-butylphosphine catalyst is effective to enable the chain-growth polymerization of anion-radical monomer Br-TPDIT-Br/Zn to PPDIT2 with a molecular weight up to Mw ≈ 50 kg mol−1 and moderate polydispersity. This is the second example of the polymerization of unusual anion-radical aromatic complexes formed in a reaction of active Zn and electron-deficient diimide-based aryl halides. As such, the discovered polymerization method is not a specific reactivity feature of the naphthalene-diimide derivatives but is rather a general polymerization tool. This is an important finding, given the significantly higher maximum external quantum efficiency that can be reached with PDI-based copolymers (32–45%) in all-polymer solar cells compared to NDI-based materials (15–30%). Our studies revealed that PPDIT2 synthesized by the new method and the previously published polymer prepared by step-growth Stille polycondensation show similar electron mobility and all-polymer solar cell performance. At the same time, the polymerization reported herein has several technological advantages as it proceeds relatively fast at room temperature and does not involve toxic tin-based compounds. Because several chain-growth polymerization reactions are well-suited for the preparation of well-defined multi-functional polymer architectures, the next target is to explore the utility of the discovered polymerization in the synthesis of end-functionalized polymers and block copolymers. Such materials would be helpful to improve the nanoscale morphology of polymer blends in all-polymer solar cells.
This study examines the course and driving forces of recent vegetation change in the Mongolian steppe. A sediment core covering the last 55years from a small closed-basin lake in central Mongolia was analyzed for its multi-proxy record at annual resolution. Pollen analysis shows that highest abundances of planted Poaceae and highest vegetation diversity occurred during 1977-1992, reflecting agricultural development in the lake area. A decrease in diversity and an increase in Artemisia abundance after 1992 indicate enhanced vegetation degradation in recent times, most probably because of overgrazing and farmland abandonment. Human impact is the main factor for the vegetation degradation within the past decades as revealed by a series of redundancy analyses, while climate change and soil erosion play subordinate roles. High Pediastrum (a green algae) influx, high atomic total organic carbon/total nitrogen (TOC/TN) ratios, abundant coarse detrital grains, and the decrease of C-13(org) and N-15 since about 1977 but particularly after 1992 indicate that abundant terrestrial organic matter and nutrients were transported into the lake and caused lake eutrophication, presumably because of intensified land use. Thus, we infer that the transition to a market economy in Mongolia since the early 1990s not only caused dramatic vegetation degradation but also affected the lake ecosystem through anthropogenic changes in the catchment area.
Fluid intelligence (fluid IQ), defined as the capacity for rapid problem solving and behavioral adaptation, is known to be modulated by learning and experience. Both stressful life events (SLES) and neural correlates of learning [specifically, a key mediator of adaptive learning in the brain, namely the ventral striatal representation of prediction errors (PE)] have been shown to be associated with individual differences in fluid IQ. Here, we examine the interaction between adaptive learning signals (using a well-characterized probabilistic reversal learning task in combination with fMRI) and SLES on fluid IQ measures. We find that the correlation between ventral striatal BOLD PE and fluid IQ, which we have previously reported, is quantitatively modulated by the amount of reported SLES. Thus, after experiencing adversity, basic neuronal learning signatures appear to align more closely with a general measure of flexible learning (fluid IQ), a finding complementing studies on the effects of acute stress on learning. The results suggest that an understanding of the neurobiological correlates of trait variables like fluid IQ needs to take socioemotional influences such as chronic stress into account.
Dimensional psychiatry
(2014)
A dimensional approach in psychiatry aims to identify core mechanisms of mental disorders across nosological boundaries.
We compared anticipation of reward between major psychiatric disorders, and investigated whether reward anticipation is impaired in several mental disorders and whether there is a common psychopathological correlate (negative mood) of such an impairment.
We used functional magnetic resonance imaging (fMRI) and a monetary incentive delay (MID) task to study the functional correlates of reward anticipation across major psychiatric disorders in 184 subjects, with the diagnoses of alcohol dependence (n = 26), schizophrenia (n = 44), major depressive disorder (MDD, n = 24), bipolar disorder (acute manic episode, n = 13), attention deficit/hyperactivity disorder (ADHD, n = 23), and healthy controls (n = 54). Subjects' individual Beck Depression Inventory-and State-Trait Anxiety Inventory-scores were correlated with clusters showing significant activation during reward anticipation.
During reward anticipation, we observed significant group differences in ventral striatal (VS) activation: patients with schizophrenia, alcohol dependence, and major depression showed significantly less ventral striatal activation compared to healthy controls. Depressive symptoms correlated with dysfunction in reward anticipation regardless of diagnostic entity. There was no significant correlation between anxiety symptoms and VS functional activation.
Our findings demonstrate a neurobiological dysfunction related to reward prediction that transcended disorder categories and was related to measures of depressed mood. The findings underline the potential of a dimensional approach in psychiatry and strengthen the hypothesis that neurobiological research in psychiatric disorders can be targeted at core mechanisms that are likely to be implicated in a range of clinical entities.