Cation migration in layered oxide cathodes for sodium-ion batteries: fundamental failure mechanisms and practical modulation strategies.

Sodium-ion batteries (SIBs) are regarded as competitive candidates for the next generation of electrochemical energy storage (EES) systems due to their low cost and abundant sodium resources. Layered oxide cathodes have attracted much interest owing to their simple preparation process, high specific capacity and environmental friendliness. However, undesired cation migration during electrochemical reactions can lead to irreversible phase transitions and structural degradation of layered oxide cathode materials, resulting in a sharp decrease in specific capacity and energy density.

Routes to high-performance layered oxide cathodes for sodium-ion batteries.

Sodium-ion batteries (SIBs) are experiencing a large-scale renaissance to supplement or replace expensive lithium-ion batteries (LIBs) and low energy density lead-acid batteries in electrical energy storage systems and other applications. In this case, layered oxide materials have become one of the most popular cathode candidates for SIBs because of their low cost and comparatively facile synthesis method. However, the intrinsic shortcomings of layered oxide cathodes, which severely limit their commercialization process, urgently need to be addressed.

Nickel Nanoparticles Protruding from Molybdenum Carbide Micropillars with Carbon Layer-Protected Biphasic 0D/1D Heterostructures for Efficient Water Splitting.

It remains a tremendous challenge to achieve high-efficiency bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) for hydrogen production by water splitting. Herein, a novel hybrid of 0D nickel nanoparticles dispersed on the one-dimensional (1D) molybdenum carbide micropillars embedded in the carbon layers (Ni/MoC@C) was successfully prepared on nickel foam by a facile pyrolysis strategy. During the synthesis process, the nickel nanoparticles and molybdenum carbide were simultaneously generated under H and CH mixed atmospheres and conformally encapsulated in the carbon layers.

Erratum to "Withdrawal notice to the effectiveness of diaphragmatic breathing relaxation training for improving sleep quality among nursing staff during the COVID-19 outbreak: a before and after study" [Sleep Medicine X (2) (2020) 100026].

[This corrects the article DOI: 10.1016/j.sleepx.

The effectiveness of diaphragmatic breathing relaxation training for improving sleep quality among nursing staff during the COVID-19 outbreak: a before and after study.

Objectives: Recent studies have demonstrated that first-line nurses involved in the coronavirus disease-2019 (COVID-19) crisis may experience sleep disturbances. As breathing relaxation techniques can improve sleep quality, anxiety, and depression, the current study aimed to evaluate the effectiveness of diaphragmatic breathing relaxation training (DBRT) for improving sleep quality among nurses in Wuhan, China during the COVID-19 outbreak.

Methods: This study used a quasi-experimental (before and after) intervention strategy, with 151 first-line nurses from four wards in Leishenshan hospital.

[Epidemiological characteristics of imported malaria in Sichuan Province in 2015].

Objective: To analyze the epidemiological characteristics of imported malaria in Sichuan Province in 2015 in the aim of providing scientific basis for malaria control.

Methods: The epidemiological data of malaria in Sichuan Province reported through the Infectious Disease Reporting and Management System of China Information System for Disease Control and Prevention in 2015 were collected and analyzed.

Results: In 2015,290 malaria cases were reported in Sichuan Provinc, consisting of 158 falciparum malaria cases (54.

[Study on the Lateral Growth of Ag Nanowires and Its Inhibition].

Ag nanowires (Ag NWs) are synthesized by polyol method under the conditions of different temperature of reaction solution, different addition amount and injection rate of polyvinylpyrrolidone (PVP). The structure and the process of lateral growth of Ag NWs were observed and analyzed by X-ray diffraction (XRD), ultraviolet-visible absorption spectrum (UV-VIS), scanning electron microscopy (SEM) and transmission electron microscope (TEM). It showed that the lateral growth of Ag NWs and longitudinal growth of Ag NWs occurrs at the same time by UV-VIS.

[Epidemiological analysis of malaria prevalence in Sichuan Province, 2012-2014].

Objective: To understand the characteristics of malaria prevalence in Sichuan Province from 2012 to 2014, so as to provide evidences for improving the work of malaria elimination.

Methods: The epidemiological data of malaria cases in Sichuan Province were collected from the Disease Surveillance Information Reporting System of Chinese Center for Disease Control and Prevention, and analyzed with the descriptive epidemiological method.

Results: A total of 690 imported malaria cases were reported in Sichuan Province from 2012 to 2014.

[Evaluation of implementing effects of Global Fund Malaria Program Round 1 in Junlian County, Sichuan Province].

Objective: To evaluate the implementing effects of the first round malaria control project supported by the Global Fund on malaria control in Sichuan Province, so as to provide the evidence for intensifying the control strategy of malaria.

Methods: Based on the requirements of the malaria project of Globe Fund, the comprehensive malaria control measures including case identification, health education and training for doctors were carried out.

Results: In 2007, the malaria incidence was 0.

Altered expression of hyperpolarization-activated cyclic nucleotide-gated channels and microRNA-1 and -133 in patients with age-associated atrial fibrillation.

Hyperpolarization-activated cyclic nucleotide-gated (HCN) cation channels mediate pacemaker currents in the atrium. The microRNA (miR) families miR-1 and miR-133 regulate the expression of multiple genes involved in myocardial function, including HCN channels. It was hypothesized that age‑dependent changes in HCN2, HCN4, miR‑1 and miR‑133 expression may contribute to age‑associated atrial fibrillation, and therefore the correlation between expression levels, among adult (≤65 years) and aged patients (≥65 years), and sinus rhythm was determined.

[Therapeutic effects of titanium elastic nails for the treatment of clavicular fractures in elder children].

Objective: To research the application and clinical effect of titanium elastic nails (TEN) for the treatment of closed clavicular fracture in elder children.

Methods: From October 2010 to December 2012,16 elderly children with clavicular fracture of elder children were treated with internal fixation, including 9 boys and 7 girls with an average age of 14.2 yeats old ranging from 9 to 17 years.

Advanced glycation end products induce endothelial-to-mesenchymal transition via downregulating Sirt 1 and upregulating TGF-β in human endothelial cells.

In the present study, we examined the advanced glycation end products- (AGEs-) induced endothelial-to-mesenchymal transition (EndMT) in human umbilical vein endothelial cells (HUVECs). Results demonstrated that AGE-BSAs significantly reduced the cluster of differentiation 31 (CD 31) expression, whereas they promoted the expression of fibroblast-specific protein-1 (FSP-1), α-smooth muscle antibody (α-SMA), and collagen I at both mRNA and protein levels in HUVECs. And the AGE-BSAs also promoted the receptors for AGEs (RAGEs) and receptor I for TGF-β (TGFR I) markedly with a dose dependence, whereas the Sirt 1 was significantly downregulated by the AGE-BSA at both mRNA and protein levels.

[Association of single nucleotide polymorphism of KCNE1 and KCNE4 gene with atrial fibrillation in Xinjiang Uygur and Han population].

Objective: To investigate the association between the KCNE1 gene G38S and the KCNE4 gene E145D and atrial fibrillation in Uygur and Han populations living in Xinjiang.

Methods: KCNE1 gene G38S and the KCNE4 gene E145D genotype and frequency were determined using PCR restriction fragment length polymorphism (PCR-RFLP) in 488 atrial fibrillation patients (237 Uygur and 251 Han residents) and 488 age-and-gender matched controls (237 Uygur and 251 Han residents).

Results: Genotype and allele frequency of KCNE1 gene G38S were similar between atrial fibrillation group and control group in the Han population (P = 0.

[Ecological behavior comparison between Anopheles pseudowillmori and A. willmori in villages with malaria outbreaks in Motuo County, Tibet Autonomous Region].

Objective: To understand the ecological behaviors of Anopheles pseudowillmori and A. willmori in medium or high altitude areas of Motuo County, Tibet Autonomous Region, and their transmission potential for malaria.

Methods: The methods of human net traps, cow baited trap, house baited trap, pig baited trap and CDC light traps were adopted for investigating the mosquito density, biting activity at night and in or out door preference of biting.

Aging-associated changes in L-type calcium channels in the left atria of dogs.

Action potential (AP) contours vary considerably between the fibers of normal adult and aged left atria. The underlying ionic and molecular mechanisms that mediate these differences remain unknown. The aim of the present study was to investigate whether the L-type calcium current (I) and the L-type Ca channel of the left atria may be altered with age to contribute to atrial fibrillation (AF).

Alterations in the expression of atrial calpains in electrical and structural remodeling during aging and atrial fibrillation.

The aim of this study was to investigate the correlation between the change in the expression of atrial calpains and electrical, molecular and structural remodeling during aging and atrial fibrillation (AF). Adult and aged canines in sinus rhythm (SR) and with persistent AF (induced by rapid atrial pacing) were investigated. A whole-cell patch clamp was used to measure the L-type Ca2+ current (ICa-L) in cells in the left atrium.

Age-related changes in cellular electrophysiology and calcium handling for atrial fibrillation.

This study was to investigate whether or not the dysfunction of atrial repolarization and abnormality of the intracellular Ca(2+) handling protein was augmented with ageing. Four groups of dogs were studied, adult and aged dogs in sinus rhythm (SR) and atrial fibrillation (AF) induced by rapid atrial pacing. We used whole cell patch clamp recording techniques to measure L-type Ca(2+) current in cardiomyocytes dispersed from the left atria.

Changes in microRNAs expression are involved in age-related atrial structural remodeling and atrial fibrillation.

Background: Small noncoding microRNAs regulate gene expression in cardiac development and disease and have been implicated in the aging process and in the regulation of extracellular matrix proteins. However, their role in age-related cardiac remodeling and atrial fibrillation (AF) was not well understood. The present study was designed to decipher molecular mechanisms underlying age-related atrial structural remodeling and AF.

Accelerated fibrosis and apoptosis with ageing and in atrial fibrillation: Adaptive responses with maladaptive consequences.

The aim of this study was to investigate whether abnormal expression of matrix metalloproteinase (MMP)-9/tissue inhibitors of MMPs (TIMP)-1 and B cell lymphoma 2 (BCL-2)/BCL-2-associated X protein (BAX) are correlated with the characteristic accelerated fibrosis and apoptosis during ageing and in atrial fibrillation (AF). Four groups of dogs were studied: adult dogs in sinus rhythm (SR), aged dogs in SR, adult dogs with AF induced by rapid atrial pacing and aged dogs with AF induced by rapid atrial pacing. The mRNA and protein expression levels of the target gene in the left atrium were measured by quantitative reverse transcription-polymerase chain reaction (RT-PCR) and western blot analysis.

Predictive factors and clinical effect of optimized cardiac resynchronization therapy.

The aim of this study was to assess the effectiveness of cardiac resynchronization therapy (CRT) by intracardiac delay optimization using echocardiography. Sixty-five patients were implanted with a CRT device randomly assigned to receive simultaneous biventricular pacing or echo-optimized sequential CRT. Forty-two patients were defined as responders and 23 patients were classified as non-responders.

[Aging-related ionic remodeling of L-type voltage dependent calcium channel in left atria of canine].

Objective: To investigate aging-related ionic remodeling of L-type voltage dependent calcium channel (LVDCC) in left atria of canine.

Methods: Seven adult (2.0 - 2.

[Investigation on Anopheles species and their composition in villages at different altitudes of Motuo County, Tibet Autonomous Region].

Objective: To study the anopheline species and composition in villages at different altitudes, Muotuo County.

Methods: Six villages with different altitudes were selected as the investigation spots, i.e.

[Safety and efficacy of intraoperative defibrillation threshold measured by defibrillation safety margin in 52 patients with implantable cardioverter defibrillator].

Objective: To observe the safety and efficacy of implantable cardioverter defibrillator (ICD) intraoperative defibrillation threshold (DFT) measured by defibrillation safety margin (DSM).

Methods: Fifty-two patients underwent ICD implantation were enrolled in this study (25 single chamber ICD, 23 double chamber ICD, 4 three chamber ICD). DFT was measured by DSM method.