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J Phys Chem A 2022 Jun 28. Epub 2022 Jun 28.

Department of Geosciences, Georgia State University, Atlanta, Georgia 30303, United States.

Periodic plane-wave density functional theory (DFT) calculations were performed on the α-quartz (SiO) (101) surface to model exchange of adsorbed Li and either Na, K, or Rb in inner- and outer-sphere adsorbed, and aqueous configurations, which are charge-balanced with 2 Cl. SiO or SiOH groups represented the adsorption surface sites. The SiO models included 58 HO and 2 HO molecules to approximate an aqueous environment, whereas the SiOH models had 59 HO and 1 HO molecules. Read More

Sleep Epidemiol 2021 Dec 25;1. Epub 2021 Nov 25.

Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, MA, USA.

Study Objectives: Clinical and population health recommendations are derived from studies that include self-report. Differences in question wording and response scales may significantly affect responses. We conducted a methodological review assessing variation in event definition(s), context (i. Read More

Environ Technol Innov 2022 Jun 22:102775. Epub 2022 Jun 22.

Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University, Qatar Foundation, P.O. Box 34110, Doha, Qatar.

The apparent uncertainty associated with shedding patterns, environmental impacts, and sample processing strategies have greatly influenced the variability of SARS-CoV-2 concentrations in wastewater. This study evaluates the use of a new normalization approach using human RNase P for the logic estimation of SARS-CoV-2 viral load in wastewater. SARS-CoV-2 variants outbreak was monitored during the circulating wave between February and August 2021. Read More

Chemistry 2022 Jun 27. Epub 2022 Jun 27.

University of Aarhus, Department of Chemistry, Department of Chemistry, Langelandsgade 140, 8000, Aarhus, DENMARK.

Melamine is a precursor and building block for graphitic carbon nitride (g-CN) materials, a group of layered materials showing great promise for catalytic applications. The synthetic pathway to g-CN includes a polycondensation reaction of melamine by evaporation of ammonia. Melamine molecules in the crystal organize into wave-like planes with an interlayer distance of 3. Read More

J Biomech 2022 Jun 10;141:111179. Epub 2022 Jun 10.

Department of Biomedical Engineering, School of Engineering and Applied Science, Yale University, New Haven, CT, USA; Vascular Biology and Therapeutics Program, Yale School of Medicine, New Haven, CT, USA.

Mechanical homeostasis emerges following normal development of the arterial wall and requires thereafter a slow balanced degradation and deposition of extracellular matrix constituents within an unchanging mechanical state. Recent findings suggest that homeostasis is compromised in arterial aging, which contributes to the structural stiffening that is characteristic of aged central arteries. Matrix metalloproteinases (MMPs) have strong proteolytic activity and play fundamental roles in matrix turnover. Read More