Advanced search    

Search: *

84,798 papers found. Showing first 1,000 results.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Tests of the Stability of Chinese RhFe Resistance Thermometers at Low Temperatures

Rhodium–iron resistance thermometers are recommended as precise thermometers at temperatures below 25 K. The thermometers were developed at the National Physical Laboratory and produced by H. Tinsley and Co Ltd almost 50 years ago. Later, they were made by other companies and institutes as well, but despite this, the availability of the thermometers decreased and a new source of ...

Genome-wide identification of grain filling genes regulated by the OsSMF1 transcription factor in rice

Background Spatial- and temporal-specific expression patterns are primarily regulated at the transcriptional level by gene promoters. Therefore, it is important to identify the binding motifs of transcription factors to better understand the networks associated with embryogenesis. Results Here, we used a protein-binding microarray (PBM) to identify the binding motifs of OsSMF1, ...

Magnetocaloric-Transport Properties Correlation in La0.8 Ca0.2MnO3-Doped Manganites

This investigation is interested in studying the relation between magnetocaloric effect and transport properties i La0.8Ca0.2MnO3 manganite compound. The value of the magnetocaloric effect has been determined from the calculation of magnetization as a function of temperature under different external magnetic fields. This study also provides an alternative method to determine the ...

Skills, earnings, and employment: exploring causality in the estimation of returns to skills

Ample evidence indicates that a person’s human capital is important for success on the labor market in terms of both wages and employment prospects. However, unlike the efforts to identify the impact of school attainment on labor-market outcomes, the literature on returns to cognitive skills has not yet provided convincing evidence that the estimated returns can be causally ...

The self-concept life cycle and brand perceptions: An interdisciplinary perspective

Consumer research has paid scant attention to the full spectrum of a consumer’s self-concept life cycle and its subsequent impact on brand attitude. This article presents a conceptual framework that provides the foundation for future research on how the self-concept, across its full life cycle, impacts brand attitude. The article considers the development of the self-concept from ...

The Boundary Effect on the Energy Gap of High T c Superconductors

Spatial dependence of the pairing potential across the thickness of the superconducting CuO2 planes in high T c superconductors (HTSC) copper oxides is found by using the Ginzburg-Landau-Gor’kov (GLG) theory. The potential turned out to be significantly suppressed due to an effect of non-superconducting layers, which separate the CuO2 planes. The effect leads also to the reduction ...

Modulatory Effects of Perineuronal Oligodendrocytes on Neuronal Activity in the Rat Hippocampus

Action potentials are fundamental to relaying information from region to region in the nervous system. Changes in action potential firing patterns in neural circuits influence how the brain processes information. In our previous study, we focused on interneuron/perineuronal astrocyte pairs in the hippocampal CA1 region and reported that direct depolarization of perineuronal ...

The Janus Head of Oxidative Stress in Metabolic Diseases and During Physical Exercise

Purpose of Review Oxidative stress describes an imbalance between production and degradation of reactive oxygen species (ROS), which can damage macromolecules. However, ROS may also serve as signaling molecules activating cellular pathways involved in cell proliferation and adaptation. This review describes alterations in metabolic diseases including obesity, insulin resistance, ...

The Leukocentric Theory of Neurological Disorder: A Manifesto

Approximately half of the human brain is composed of white matter (WM), a specialized tissue housing the axonal projection of neurons and their necessary supporting glial cells. Axons course long distances from their parent soma, have a delicate structure, large surface area and in many cases are dependent upon a uniquely close morphological arrangement with myelinating ...

Phase-Dependent Astroglial Alterations in Li–Pilocarpine-Induced Status Epilepticus in Young Rats

Epilepsy prevalence is high in infancy and in the elderly population. Lithium–pilocarpine is widely used to induce experimental animal models of epilepsy, leading to similar neurochemical and morphological alterations to those observed in temporal lobe epilepsy. As astrocytes have been implicated in epileptic disorders, we hypothesized that specific astroglial changes accompany and ...

The Utrecht cohort for Multiple BREast cancer intervention studies and Long-term evaLuAtion (UMBRELLA): objectives, design, and baseline results

Purpose In oncology, RCTs are often beset by slow recruitment, limited generalizability, and strong preferences for interventions by patients and physicians. The cohort multiple randomized controlled trial (cmRCT) is an innovative design with the potential to overcome those challenges. In cmRCT, a prospective cohort serves as an infrastructure for multiple RCTs. We implemented ...

Using Metal-Multilayer-Dielectric Structure to Increase Sensitivity of Surface Plasmon Resonance Sensor

We propose using a specially designed metal-multilayer-dielectric structure deposited on glass substrate to enhance the evanescent field and improve the sensitivity of the surface plasmon resonance sensor. The proposed structure supports both hybrid plasmonic transverse magnetic modes and conventional waveguide transverse electric modes. We show numerically the significant ...

Infrared, Raman and Magnetic Resonance Spectroscopic Study of SiO2:C Nanopowders

Optical and magnetic properties of SiO2:C nanopowders obtained by chemical and thermal modification of fumed silica were studied by Fourier transform infrared spectroscopy, Raman, continuous wave (CW) electron paramagnetic resonance (EPR), echo-detected EPR and pulsed electron nuclear double resonance (ENDOR) spectroscopy. Two overlapping signals of Lorentzian lineshape were ...

Sex Differences in Obesity and Mental Health

Purpose of Review The purposes of this study were to examine the relationships between obesity and a wide range of mental health issues and to identify where sex differences exist and may vary across disorders. Recent Findings Research on sex differences in the relationship between obesity and psychiatric disorders is more abundant in some areas, such as depression and eating ...

Energy Transfer in Ce0.85Tb0.15F3 Nanoparticles-CTAB Shell-Chlorin e6 System

Formation and electronic excitation energy transfer process in the nanosystem consisting of Ce0.85Tb0.15F3 nanoparticles, cetrimonium bromide (CTAB) surfactant, and chlorin e6 photosensitizer were studied. It was shown that chlorin e6 molecules bind to Ce0.85Tb0.15F3 NP in the presence of CTAB forming thus Ce0.85Tb0.15F3 NP-CTAB-chlorin e6 nanosystem. We consider that binding ...

Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

The microstructure and phase composition of the high-content Al2O3-Y2O3-doped spark plasma-sintered silicon nitride were investigated. Fully dense silicon nitride ceramics with a typical α-Si3N4 equiaxed structure with average grain size from 200 to 530 nm, high elastic modulus of 288 GPa, and high hardness of 2038 HV were spark plasma sintered (SPSed) at 1550 °C. Silicon nitride ...

Exaggerated Sexual Swellings and the Probability of Conception in Wild Sanje Mangabeys (Cercocebus sanjei)

Females of several catarrhine primate species exhibit exaggerated sexual swellings that change in size and coloration during the menstrual cycle and, in some species, gestation. Although their function remains under debate, studies indicate that swellings may contain information males could use to discern ovulation and the probability that a cycle will be conceptive. Here we ...

The Provision of Spiritual Care in Hospices: A Study in Four Hospices in North Rhine-Westphalia

This article considers the role and the practices of spiritual care in hospices. While spiritual care was firmly established as one of the four pillars of practical hospice care alongside medical, psychological and social care by Cicely Saunders, the importance and functions of spiritual care in daily practice remain arguable. When speaking about spirituality, what are we actually ...