Single-Atom Pt Boosting Electrochemical Nonenzymatic Glucose Sensing on Ni(OH)/N-Doped Graphene.

Conventional nanomaterials in electrochemical nonenzymatic sensing face huge challenge due to their complex size-, surface-, and composition-dependent catalytic properties and low active site density. In this work, we designed a single-atom Pt supported on Ni(OH) nanoplates/nitrogen-doped graphene (Pt/Ni(OH)/NG) as the first example for constructing a single-atom catalyst based electrochemical nonenzymatic glucose sensor. The resulting Pt/Ni(OH)/NG exhibited a low anode peak potential of 0.

Free-Standing N-Doped Porous Carbon Fiber Membrane Derived From Zn-MOF-74: Synthesis and Application as Anode for Sodium-Ion Battery With an Excellent Performance.

It is important to develop new energy storage and conversion technology to mitigate the energy crisis for the sustainable development of human society. In this study, free-standing porous nitrogen-doped carbon fiber (PN-CF) membranes were obtained from the pyrolysis of Zn-MOF-74/polyacrylonitrile (PAN) composite fibers, which were fabricated by an electrospinning technology. The resulting free-standing fibers can be cut into membrane disks and directly used as an anode electrode without the addition of any binder or additive.

[Effect of casein osphopeptide-amorphous calcium phosphate solution in preventing enamel demineralization].

Objective: To evaluate the effects of casein osphopeptide-amorphous calcium phosphate (CPP-ACP) in preventing enamel demineralization.

Methods: Enamel blocks were prepared from premolars extracted from orthodontic patients. The specimens were treated for 30 min daily for 7 days with one of the following agents: deionized water (negative control), CPP-ACP paste, and NaF solutions (positive controls) (0.

[Detection of Helicobacter pylori in oral cavity of patients with recurrent aphthous ulcer].

Objective: To investigate the association of recurrent aphthous ulcer (RAU) with Helicobacter pylori (Hp) infection and digestive diseases.

Methods: Saliva samples were collected from 82 patients with RAU and 74 healthy volunteers for Hp detection with PCR.

Results: The positivity rates of HP differed significantly between RAU patients and healthy volunteers (43.