Sodium Density Associates with Nighttime Systolic Blood Pressure in Young Healthy Adults

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Hydrogen bonding induced distortion of CO₃ units and kinetic stabilization of amorphous calcium carbonate : results from 2D ¹³C NMR spectroscopy

Systematic correlation in alkaline-earth carbonate compounds between the deviation of the CO₃ units from the perfect D₃h symmetry and their ¹³C nuclear magnetic resonance (NMR) chemical shift anisotropy (CSA) parameters is established. The ¹³C NMR CSA parameters of amorphous calcium carbonate (ACC) are measured using two-dimensional ¹³C phase adjusted spinning sidebands (PASS) NMR spectroscopy and are analyzed on the basis of this correlation. The results indicate a distortion of the CO₃ units in ACC in the form of an in-plane displacement of the C atom away from the centroid of the O₃ triangle, resulting from hydrogen bonding with the surrounding H₂O molecules, without significant out-of-plane displacement. Similar distortion for all C atoms in the structure of ACC suggests a uniform spatial disposition of H₂O molecules around the CO₃ units forming a hydrogen-bonded amorphous network. This amorphous network is stabilized against crystallization by steric frustration, while additives such as Mg presumably provide further stabilization by increasing the energy of dehydration.8 page(s

NMDS plot for macroinvertebrate communities extracted from soil cores collected at Harvard Forest (top panel) and Duke Forest (bottom panel) warming chambers.

<p>The colors represent the average air temperature in chambers April 2010-June 2013; the yellow to red color gradient represents cooler to warmer chambers.</p

Model results for Harvard Forest macrofauna common garden mesocosms. Also listed are the range of values observed across treatments.

<p>Model results for Harvard Forest macrofauna common garden mesocosms. Also listed are the range of values observed across treatments.</p

Intricate Short-Range Ordering and Strongly Anisotropic Transport Properties of Li<inf>1-x</inf>Sn<inf>2+x</inf>As<inf>2</inf>

International audienceA new ternary compound, Li1-xSn2+xAs2, 0.2 3As3 puckered hexagons in a chair conformation that share all edges. Li/Sn atoms in the interlayer space are surrounded by a regular As6 octahedron. Thorough investigation by synchrotron X-ray and neutron powder diffraction indicate no long-range Li/Sn ordering. In contrast, the local Li/Sn ordering was revealed by synergistic investigations via solid-state 6,7Li NMR spectroscopy, HRTEM, STEM, and neutron and X-ray pair distribution function analyses. Due to their different chemical natures, Li and Sn atoms tend to segregate into Li-rich and Sn-rich regions, creating substantial inhomogeneity on the nanoscale. The inhomogeneous local structure has a high impact on the physical properties of the synthesized compounds the local Li/Sn ordering and multiple nanoscale interfaces result in unexpectedly low thermal conductivity and highly anisotropic resistivity in Li1-xSn2+xAs2. (Graph Presented). © 2015 American Chemical Society

Average field mesocosm R_H (μmol CO₂ m-2 s-1 ± SE), through time, for biota treatments, averaged across warming treatments.

<p>Average field mesocosm R_H (μmol CO₂ m-2 s-1 ± SE), through time, for biota treatments, averaged across warming treatments.</p

Patient-report and caregiver-report measures of rehabilitation service use following acquired brain injury: a systematic review

Objective To review patient-report/caregiver-report measures of rehabilitation service use following acquired brain injury (ABI).Data sources Medline, APA PsycINFO, Embase and CINAHL were searched on November 2021 and November 2022. Authors were contacted if measures were not included in manuscripts/appendices.Study selection Included articles were empirical research or a research protocol, available in English and described measures of patient report/caregiver report of rehabilitation service use post-ABI via quantitative or qualitative methods. Two reviewers independently screened 5290 records using DistillerSR. Discrepancies were resolved by team adjudication.Data extraction Data extraction was piloted with high levels of agreement (k=.94). Data were extracted by a single member with team meetings to seek guidance as needed. Data included administration characteristics (reporter, mode of administration, recall period), psychometric evidence and dimensions assessed (types of services, setting, frequency, duration, intensity, qualitative aspects).Data synthesis One hundred and fifty-two measures were identified from 85 quantitative, 56 qualitative and 3 psychometric studies. Psychometric properties were reported for four measures, all of which focused on satisfaction. Most measures inquired about the type of rehabilitation services used, with more than half assessing functional (eg, physical therapy) and behavioural health rehabilitation services, but fewer than half assessing community and academic reintegration (eg, special education, vocational rehabilitation) or cognitive (eg, neuropsychology) services. Fewer than half assessed qualitative aspects (eg, satisfaction). Recall periods ranged from 1 month to ‘since the ABI event’ or focused on current use. Of measures that could be accessed (n=71), many included a limited checklist of types of services used. Very few measures assessed setting, frequency, intensity or duration.Conclusions Despite widespread interest, the vast majority of measures have not been validated and are limited in scope. Use of gold-standard psychometric methods to develop and validate a comprehensive patient-report/caregiver-report measure of rehabilitation service use would have wide-ranging implications for improving rehabilitation research in ABI

Proportion invertebrate mortality, in biota treatments with macroinvertebrates, across warming treatments.

<p>Proportion invertebrate mortality, in biota treatments with macroinvertebrates, across warming treatments.</p

Model results for Duke Forest macrofauna common garden mesocosms.

<p>Model results for Duke Forest macrofauna common garden mesocosms.</p