247 research outputs found
Adding a Piece to the Puzzle? The Allocation of Figurative Language Comprehension into the CHC Model of Cognitive Abilities
The study aimed to investigate the allocation of figurative language comprehension (FLC) within the CattellâHornâCarroll (CHC) model of cognitive abilities, using three newly developed tests: the Reverse Paraphrase Test (RPT), the Literal Paraphrase Test (LPT), and the Proverb Test (PT). The analysis of a sample of 909 participants revealed that the RPT and LPT measured a unidimensional construct of FLC, while the PT was excluded due to insufficient fit. Combining RPT and LPT items, various models were evaluated, with a bifactor S-1 model showing the best fit, indicating the influence of a general factor (representing FLC) and test-specific method factors. The study explored FLC allocation within the CHC model, supporting its consideration as a distinct factor under the g factor. Examining the nomological network, significant correlations emerged between the Intellectual Curiosity and Aesthetic Sensitivity facets of Openness and FLC, which were comparable in size to the relation with general ability. In conclusion, the study enhances the understanding of FLC within the CHC model, advocating its recognition as a distinct factor. Correlations with Openness facets suggest valuable insights into the interplay between cognitive abilities and personality, necessitating further research for a deeper exploration of this relation.Land Berlin, SenatskanzleiâWissenschaft und ForschungPeer Reviewe
Self-assembly of the chiral donor-acceptor molecule DCzDCN on Cu(100)
Donor-acceptor (D-A) structured molecules are essential components in organic
electronics. The respective molecular structure of these molecules and their
synthesis are primarily determined by the intended area of application.
Typically, D-A molecules promote charge separation and transport in organic
photovoltaics (OPV) or organic field-effect transistors (OFET). D-A molecules
showing a larger twist angle between D and A units are, e.g., extremely
important for the development of high internal quantum efficiency in organic
light-emitting diodes (OLEDs). A prototypical molecule of this D-A type is
DCzDCN (5-(4,6-diphenyl-1,3,5-triazin-2-yl)benzene-1,3-dinitrile). In most
cases, these molecules are only investigated regarding their electronic and
structural interaction in bulk aggregates but not in ultra-thin films supported
by a metallic substrate. Here, we present growth and electronic structure
studies of DCzDCN on a Cu(100) surface. In a complementary approach, through
the use of Scanning Tunneling Microscopy and Spectroscopy (STM and STS), we
were able to view both the adsorption geometry and the local electronic states
of the adsorbed molecules in direct comparison with the integral electronic
structure of the DCzDCN/CU(100) interface using Ultraviolet and Inverse
Photoemission Spectroscopy (UPS and IPS). The orientation of the molecules with
the donor part towards the substrate results in a chiral resolution at the
interface due to the molecular as well as the substrate symmetry and additional
strong molecular electrostatic forces. Thus, the formation of various
bulk-unlike homochiral structures and the appearance of hybrid interface states
(HIS) modifies the molecular electronic properties of the DCzDCN/Cu(100) system
significantly compared to that of a single DCzDCN molecule. This may be not
only useful for optoelectronic applications but also in organic spintronics.Comment: 28 +5 pages, 9 + 5 figures (paper + supplement
Enhancement of the Critical Heat Flux During the Cooling of Power Electronics
Semiconductor-based power electronics such as IGBT (insulated-gate bipolar transistor) modules are used in various applications. During their operation, several kilowatts of waste heat are produced in a single module, which must be specifically dissipated in order to guarantee reliable operation. With the trend towards the downsizing of modules and the demand for high power density in the development of new IGBT-modules, there is a need for efficient heat dissipation. Within the scope of a research project the principle of a natural circulation is investigated for the application of cooling power electronics referring to a patent of Fischer, Langebach and Lindenmßller (2017). A metal cover plate, a polycarbonate frame and the IGBT module form the experimental setup. The pool boiling of a low GWP refrigerant at the baseplate of the IGBT module is investigated. With the heat sink of the original base plate surface, a maximum heat flux of 88.6 kW/m² under certain conditions could be dissipated. This value is considerably lower than the results from literature. Additionally, various methods to improve the critical heat flux were conducted and the results are presented
Ultrafine carbon particles down-regulate CYP1B1 expression in human monocytes
Cytochrome P450 monoxygenases play an important role in the defence against inhaled toxic compounds and in metabolizing a wide range of xenobiotics and environmental contaminants. In ambient aerosol the ultrafine particle fraction which penetrates deeply into the lungs is considered to be a major factor for adverse health effects. The cells mainly affected by inhaled particles are lung epithelial cells and cells of the monocyte/macrophage lineage. RESULTS: In this study we have analyzed the effect of a mixture of fine TiO2 and ultrafine carbon black Printex 90 particles (P90) on the expression of cytochrome P450 1B1 (CYP1B1) in human monocytes, macrophages, bronchial epithelial cells and epithelial cell lines. CYP1B1 expression is strongly down-regulated by P90 in monocytes with a maximum after P90 treatment for 3 h while fine and ultrafine TiO2 had no effect. CYP1B1 was down-regulated up to 130-fold and in addition CYP1A1 mRNA was decreased 13-fold. In vitro generated monocyte-derived macrophages (MDM), epithelial cell lines, and primary bronchial epithelial cells also showed reduced CYP1B1 mRNA levels. Benzo[a]pyrene (BaP) is inducing CYB1B1 but ultrafine P90 can still down-regulate gene expression at 0.1 muM of BaP. The P90-induced reduction of CYP1B1 was also demonstrated at the protein level using Western blot analysis. CONCLUSION: These data suggest that the P90-induced reduction of CYP gene expression may interfere with the activation and/or detoxification capabilities of inhaled toxic compounds
Autoantibodies against ATP4A are a feature of the abundant autoimmunity that develops in first-degree relatives of patients with type 1 diabetes
Objective: Type 1 diabetes is associated with autoantibodies to different organs that include the gut. The objective of the study was to determine the risk of developing
gastric parietal cell autoimmunity in relation to other autoimmunity in individuals with a family history of type 1 diabetes.
Methods: Autoantibodies to the parietal cell autoantigen, H+/K+ ATPase subunit A (ATP4A) was measured in 2218 first-degree relatives of patients with type 1 diabetes, who were prospectively followed from birth for a median of 14.5 years. All were also tested regularly for the development of islet autoantibodies, transglutaminase autoantibodies, and thyroid peroxidase autoantibodies.
Results: The cumulative risk to develop ATP4A autoantibodies was 8.1% (95% CI, 6.6â9.6) by age 20 years with a maximum incidence observed at age 2 years. Risk
was increased in females (HR, 1.9; 95% CI, 1.3â2.8; p = 0.0004), relatives with the HLA DR4-DQ8/DR4-DQ8 genotype (HR, 3.4; 95% CI, 1.9â5.9; p < 0.0001) and in
participants who also had thyroid peroxidase autoantibodies (HR, 3.7; 95% CI, 2.5â 5.5; p < 0.0001). Risk for at least one of ATP4A-, islet-, transglutaminase-, or thyroid
peroxidase-autoantibodies was 24.7% (95% CI, 22.6â26.7) by age 20 years and was 47.3% (95% CI, 41.3â53.3) in relatives who had an HLA DR3/DR4-DQ8, DR4-DQ8/
DR4-DQ8, or DR3/DR3 genotype (p < 0.0001 vs. other genotypes).
Conclusions: Relatives of patients with type 1 diabetes who have risk genotypes are at very high risk for the development of autoimmunity against gastric and other organs
BMI at Age 8 Years Is Influenced by the Type 2 Diabetes Susceptibility Genes HHEX-IDE and CDKAL1
OBJECTIVE: To determine whether HHEX-IDE and CDKAL1 genes, which are associated with birth weight and susceptibility to type 2 diabetes, continue to influence growth during childhood. RESEARCH DESIGN AND METHODS: BMI, weight, and height at age 8 years expressed as age- and sex-corrected standard deviation scores (SDS) against national reference data and single-nucleotide polymorphism genotyping of HHEX-IDE and CDKAL1 loci were analyzed in 646 prospectively followed children in the German BABYDIAB cohort. All children were singleton full-term births; 386 had mothers with type 1 diabetes, and 260 had fathers with type 1 diabetes and a nondiabetic mother. RESULTS: Type 2 diabetes risk alleles at the HHEX-IDE locus were associated with reduced BMI-SDS at age 8 years (0.17 SDS per allele; P = 0.004). After stratification for birth weight, both HHEX-IDE and CDKAL1 risk alleles were associated with reduced BMI-SDS (0.45 SDS, P = 0.0002; 0.52 SDS, P = 0.0001) and weight-SDS (0.22 SDS, P = 0.04; 0.56 SDS, P = 0.0002) in children born large for gestational age (>90th percentile) but not children born small or appropriate for gestational age. Within children born large for gestational age, BMI and weight decreased with each additional type 2 diabetes risk allele ( approximately -2 kg per allele; >8 kg overall). Findings were consistent in children of mothers with type 1 diabetes (P < 0.0001) and children of nondiabetic mothers (P = 0.008). CONCLUSIONS: The type 2 diabetes susceptibility alleles at HHEX-IDE and CDKAL1 loci are associated with low BMI at age 8 years in children who were born large for gestational age
Regionale WertschĂśpfungsketten fĂźr Ăśkologische Tier- und Fleischprodukte (REGINA): Abschlussbericht zur Machbarkeitsstudie
Die BroschĂźre beinhaltet eine Machbarkeitsstudie fĂźr eine digitale Plattform zur gemeinsamen regionalen Vermarktung im Ăkolandbau. Eine solche Plattform ermĂśglicht eine bessere Direktvermarktung Ăśkologisch erzeugter Produkte. Die BroschĂźre enthält eine ausfĂźhrliche Anleitung, wie eine solche Vermarktungsplattform entwickelt und betrieben werden kann. Die Machbarkeitsstudie richtet sich an Landwirte, Verarbeiter und Vermarkter von Lebensmitteln sowie an Entwickler digitaler Plattformen.
Redaktionsschluss: 31.05.202
Lack of Association of Type 2 Diabetes Susceptibility Genotypes and Body Weight on the Development of Islet Autoimmunity and Type 1 Diabetes
AIM: To investigate whether type 2 diabetes susceptibility genes and body weight influence the development of islet autoantibodies and the rate of progression to type 1 diabetes. METHODS: Genotyping for single nucleotide polymorphisms (SNP) of the type 2 diabetes susceptibility genes CDKAL1, CDKN2A/2B, FTO, HHEX-IDE, HMGA2, IGF2BP2, KCNJ11, KCNQ1, MTNR1B, PPARG, SLC30A8 and TCF7L2 was obtained in 1350 children from parents with type 1 diabetes participating in the BABYDIAB study. Children were prospectively followed from birth for islet autoantibodies and type 1 diabetes. Data on weight and height were obtained at 9 months, 2, 5, 8, 11, and 14 years of age. RESULTS: None of type 2 diabetes risk alleles at the CDKAL1, CDKN2A/2B, FTO, HHEX-IDE, HMGA2, IGF2BP2, KCNJ11, KCNQ1, MTNR1B, PPARG and SLC30A8 loci were associated with the development of islet autoantibodies or diabetes. The type 2 diabetes susceptible genotype of TCF7L2 was associated with a lower risk of islet autoantibodies (7% vs. 12% by age of 10 years, P = 0.015, P(corrected) = 0.18). Overweight children at seroconversion did not progress to diabetes faster than non-overweight children (HR: 1.08; 95% CI: 0.48-2.45, P>0.05). CONCLUSIONS: These findings do not support an association of type 2 diabetes risk factors with islet autoimmunity or acceleration of diabetes in children with a family history of type 1 diabetes
ASSOCIATION OF NEUROPEPTIDE S RECEPTOR 1 AND GLUTAMATE DECARBOXYLASE 1 GENE POLYMORPHISMS WITH POSTTRAUMATIC STRESS DISORDER
Background: Posttraumatic stress disorder (PTSD) is an anxiety disorder caused by highly traumatic experiences. The aim of this study was to investigate the influence of single nucleotide polymorphisms (SNPs) in the neuropeptide S receptor 1 (NPSR1) and the glutamate decarboxylase 1(GAD1) gene on PTSD and its psychopathological aspects among individuals affected by the Balkan wars during the 90s.
Subjects and methods: This study was conducted as part of the South Eastern Europe (SEE) study on molecular mechanisms of PTSD. It comprised 719 participants (539 males), including those with current PTSD, remitted PTSD and healthy volunteers. Psychometric evaluation was performed using the Mini International Neuropsychiatric Interview (M.I.N.I.), the Clinician Administrated PTSD Scale (CAPS) andthe Brief Symptom Inventory (BSI). We examined NPSR1 single nucleotide polymorphism (SNP) rs324981 and GAD1 variant rs3749034 genotypes. Case-control analyses were carried out using logistical regression to determine genotype differences between all patients that had either current or remitted PTSD and control individuals. To analyse the
influence of the analysed SNPs on PTSD severity, we performed linear regression analyses with CAPS and BSI within each of the two patient groups separately. All of the calculations were performed for additive allelic, recessive, dominant and genotypic models.
Results: We observed a nominally significant association for the major allele (G) of GAD1 rs3749034 with an increased risk to develop PTSD in a case control analysis in the recessive model (P=0.0315, odds ratio=0.47, SE=0.35). In contrast, a nominally significant association of the minor allele (A) with higher CAPS scores was identified within the patient group with lifetime PTSD in the dominant model (P=0.0372, ????=6.29, SE=2.99). None of these results did withstand correction for multiple tests. No nominal significant results of GAD1 rs3749034 were found with regard to the intensity of psychological BSI symptoms. Case control analyses of NPSR1 rs324981 revealed a nominally significant higher risk for homozygous T allele carriers to develop PTSD
(P=0.0452) in the recessive model. On the other hand, the T allele showed a nominally significant association with higher BSI scores in patients suffering from lifetime PTSD in the recessive model (P=0.0434). Again, these results were not significant anymore after correction for multiple tests. No associations of NPSR1 rs324981 and CAPS score was identified.
Conclusion: The findings of this study provide some evidence that the NPSR1 and GAD1 polymorphisms might play a role in the development of war-related PTSD and its related psychological expressions. Further research is needed to elucidate the interactions of specific gene variants and environmental factors in the development of PTSD
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