Association between brominated flame retardants and periodontitis: a large-scale population-based study.

Background: The association between brominated flame retardants (BFRs) and periodontitis has remained unclear.

Methods: This research included adult participants from NHANES cycles 2009-2014. Survey-weighted generalized linear regressions were used to explore the associations between BFR exposure and periodontitis.

Association of the use of e-cigarettes, combustible cigarettes or dual use with hypertension and mortality in hypertensive individuals: Insights from NHANES 2015-2018.

Introduction: Combustible cigarettes have been shown to increase hypertension risk. Nevertheless, data on the association between electronic cigarettes (e-cigarettes), as well as dual use of e-cigarettes and combustible cigarettes, and hypertension, are limited.

Methods: This study aims to examine the association of the use of e-cigarettes, combustible cigarettes or dual use with hypertension.

Improved photocatalytic performance for selective oxidation of amines to imines on graphitic carbon nitride/bismuth tungstate heterojunctions.

Imine compounds are vital intermediates in organic synthesis, and their cost-effective and green preparation has inspired numerous interests. Herein, we employ an environmentally friendly photocatalysis strategy to selectively oxidize amines to obtain imines. The heterojunction photocatalysts of graphitic carbon nitride/bismuth tungstate (CN/BW) were fabricated by hydrothermal growth of bismuth tungstate on the surface of graphitic carbon nitride.

Graphene quantum dots decorated graphitic carbon nitride nanorods for photocatalytic removal of antibiotics.

The over-use of antibiotics has resulted in seriously environmental pollution. Metal-free photocatalysts have received tremendous attentions due to their environmental friendliness. Meanwhile, morphology and structure of photocatalysts have significant influence on their photocatalytic performance.

Facile surface modification of textiles with photocatalytic carbon nitride nanosheets and the excellent performance for self-cleaning and degradation of gaseous formaldehyde.

Great advances in photocatalysis have been made by developing various efficient photocatalysts, but investigation on practical applications of photocatalysis is relatively backward. Herein we report a facile surface modification approach to functionalize textiles with excellent ability for photocatalytic self-cleaning and degradation of indoor volatile organic pollutants. Graphitic carbon nitride nanosheets (CNNS) in colloidal suspension were directly sprayed onto the surface of cellulose fibers in textiles, and the powerful hydrogen bonding action between surface hydroxyl groups of cellulose and plentiful hydroxyl and amino groups of exfoliated CNNS from alkali-treating realizes high stability of CNNS modified textiles.

Effects of growth conditions on the GaAs/AlAs superlattices by grazing incidence X-ray reflectivity.

The effects of growth conditions on the structural properties of the GaAs/AlAs superlattices were investigated by grazing incidence X-ray reflectivity (GIXRR), transmission electron microscopy (TEM), Auger electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS). The GaAs/AlAs superlattices were prepared by molecular beam epitaxy (MBE) at different growth temperatures (500 degrees C, 600 degrees C and 660 degrees C) and growth rates (1.0 microm/h and 0.