Transport properties of Layer-Antiferromagnet CuCrS2: A possible thermoelectric material

The electrical, thermal conductivity and Seebeck coefficient of the quenched, annealed and slowly cooled phases of the layer compound CuCrS2 have been reported between 15K to 300K. We also confirm the antiferromagnetic transition at 40K in them by our magnetic measurements between 2K and 300K. The crystal flakes show a minimum around 100K in their in-plane resistance behavior. For the polycrystalline pellets the resistivity depends on their flaky texture and it attains at most 10 to 20 times of the room temperature value at the lowest temperature of measurement. The temperature dependence is complex and no definite activation energy of electronic conduction can be discerned. We find that the Seebeck coefficient is between 200-450 microV/K and is unusually large for the observed resistivity values of between 5-100 mOhm-cm at room temperature. The figure of merit ZT for the thermoelectric application is 2.3 for our quenched phases, which is much larger than 1 for useful materials. The thermal conductivity K is mostly due to lattice conduction and is reduced by the disorder in Cu- occupancy in our quenched phase. A dramatic reduction of electrical and thermal conductivity is found as the antiferromagnetic transition is approached from the paramagnetic region, and K subsequently rises in the ordered phase. We discuss the transport properties as being similar to a doped Kondo-insulator

Predictors of Shoulder Pain and Disability Index (SPADI) and work status after 1 year in patients with subacromial shoulder pain

<p>Abstract</p> <p>Background</p> <p>Shoulder pain is a common complaint in primary health care and has an unfavourable outcome in many patients. The objectives were to identify predictors for pain and disability (SPADI) and work status in patients with subacromial shoulder pain.</p> <p>Methods</p> <p>Secondary analyses of data from a randomized clinical controlled trial were performed. Outcome measures were the absolute values of the combined Shoulder Pain and Disability Index (SPADI) and work status 1 year after treatment with supervised exercises (SE) or radial extracorporeal shockwave therapy (rESWT). Predictors of outcome were investigated using multiple linear regression (SPADI) and logistic regression (work status).</p> <p>Results</p> <p>104 patients were included. Low education (≤ 12 years), previous shoulder pain, and a high baseline SPADI score predicted poor results with these variables explaining 29.9% of the variance in SPADI score at 1 year. Low education and poor self-reported health status predicted a work status of "not working": Odds Ratio, OR = 4.3(95% CI (1.3 to 14.9)), p = 0.02 for education, and OR = 1.06 (95% CI (1.0 to 1.1)), p = 0.001 for self-reported health status, respectively. Adjustments for age, gender, and treatment group were performed, but did not change the results.</p> <p>Conclusion</p> <p>Education was the most consistent predictor of pain and disability, and work status at 1 year follow-up. Also, baseline SPADI score, previous shoulder pain and self-reported health status predicted outcome.</p> <p>Trial registration</p> <p>Clinical trials NCT00653081</p

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in the interpretation of meiofaunal patterns and multistressor experiments are more informative than single stressor ones, revealing complex ecological and biological interactions. Global change has a general negative effect on meiofauna, with important consequences on benthic food webs. However, some meiofaunal species can be favoured by the extreme conditions induced by global change, as they can exhibit remarkable physiological adaptations. This review highlights the need to incorporate studies on taxonomy, genetics and function of meiofaunal taxa into global change impact research

Comment on Particle-Size Effects on the Value of Tc of MnFe2O4 : evidence for Finite-Size Scaling

We show that a nonequilibrium cation distribution is the likely explanation for the 47-K rise in the Curie temperature of ultrafine MnFe2O4 particles found by Kulkarni et al. This nonequilibrium cation distribution is argued to be caused, in part, by oxidation of Mn2+ to Mn3+ due to heating of the particles during the experiments performed by Kulkarni et al. to determine the Curie temperature

Vitamin D supplementation after malnutrition associated with time-related increase of cancer diagnoses: A cohort study of 389 patients with Wernicke-Korsakoff syndrome

Objectives: Vitamin deficiencies may reflect less-than-optimal health in select populations. The aim of this study was to determine whether vitamin D supplementation (VDs) after malnutrition may be adversely related to cancer diagnoses in a selected group of patients with alcoholic Wernicke-Korsakoff syndrome (WKS). Method: This was a retrospective cohort study of all patients admitted to Slingedael Korsakoff Center, from 1996 to 2018. The patients were subdivided into three predefined groups depending on differences in VDs: “early” supplementation, which started during or before the previous hospital admission, before the transfer to our center; “late” supplementation, which started later in our center; and “no” VDs received. Data collection involved patients’ ages, sex, body mass index, skin type, baseline serum 25-hydroxyvitamin D concentrations if available, doses of cholecalciferol (vitamin D3) supplementation, other vitamins, sun exposure, malnutrition, alcohol use, smoking, cognitive diagnoses, somatic comorbidity, cancer diagnoses, cause of death, and length of stay in Slingedael. New tumors (dependent variable) may have been diagnosed during VDs (exposed cases) or before the start of VDs, if any (unexposed cases). Results: New cancers were diagnosed in 87 of 389 (22.4%) patients after median 3 y of follow-up (interquartile range, 1.1‒5.8 y). In logistic regression analysis, age, smoking, and length of stay in log (y) showed odds ratios of 1.021, 2.74, and 1.68, respectively. The temporal relationship of VDs and cancer diagnosis was significant in VDs that started in the year leading up to the diagnosis (Wilcoxon signed-ranks test of positive ranks corresponding with supplementation and negative ranks corresponding with non-supplementation: Z score 2.54; P = 0.011). Conclusion: VDs was time-related to cancer diagnosis in a cohort of patients with alcoholic WKS. The study may suggest the proliferation of cancer as an adverse effect of VDs, particularly in malnourished patients