Effects of different parameters on thermal and mechanical properties of aminated graphene/epoxy nanocomposites connected by covalent: A molecular dynamics study

Huiping Yu,Zhihao Tong,Pei Chen,Anwen Cai,Fei Qin 한국물리학회 2020 Current Applied Physics Vol.20 No.4

This paper is devoted to studying the thermal and mechanical properties of aminated graphene (AG)/epoxy nanocomposites connected by covalent bond using molecular dynamics (MD) simulation. The effects of crosslinking degree, mass fraction and functionalized graphene (FG) type on AG/epoxy nanocomposites are considered. The elasticity modulus (E), the glass transition temperature (Tg), the coefficient of thermal expansion (CTE) and the interfacial energy (Eint) are also investigated. The MD simulation results indicate that, when the mass fraction of AG is between 1.2% and 3.1% and crosslinking degree reaches about 70%, the E, Tg, Eint and CTE of AG/epoxy nanocomposites are significantly improved compared with those of pure epoxy and graphene/ epoxy nanocomposites. The reason is that AG not only possesses some excellent thermodynamic properties of graphene, but also has the function of curing agent to crosslink with epoxy monomer to form the carbon-nitrogen (C–N) covalent bond. A better interfacial interaction between nanoparticles and epoxy is essential in enhancing the thermal and mechanical properties of nanocomposite materials, which will provide a microscopic theoretical basis for the study of epoxy nanocomposites.

Controlled synthesis of CoFe2O4/MoS2 nanocomposites with excellent sedimentation stability for magnetorheological fluid

Guangshuo Wang,Fei Zhou,Ziwei Lu,Yingying Ma,Xiaoguang Li,Yu Tong,Xufeng Dong 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.70 No.-

In this study, we reported novel nanocomposites containing cobalt ferrite (CoFe2O4) nanoparticles andmolybdenum disulfide (MoS2) nanosheets (CoFe2O4/MoS2). The obtained CoFe2O4/MoS2 as dispersedphase was used to prepare magnetorheological (MR)fluid and the rheological properties wereinvestigated in detail. The results of transmission electron microscopy showed that the CoFe2O4nanoparticles were homogeneoused decorated on the surface of MoS2 nanosheets. The successfulpreparation of CoFe2O4/MoS2 was further confirmed by X-ray diffraction, X-ray photoelectronspectroscopy, Raman spectroscopy and vibrating sample magnetometer. The CoFe2O4/MoS2 based MRfluid exhibited typical MR effect with increasing viscosity, shear stress, yield stress and dynamic shearmoduli depending on external magneticfields. More importantly, the preparedfluid showed excellentsedimentation stability due to unique two-dimensional structure and reducedfluid-particle densitymismatch.

Polyethersulfone membrane modified by zwitterionic groups for improving anti-fouling and antibacterial properties

Wei Jin,Yu-Fei Lin,Zhen-Liang Xu,Ping-Ping Li,Jia-Yue Dai,Yi-Hao Tong,Xin Zhang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.122 No.-

Ultrafiltration (UF) membranes are commonly confronted with threats from pollutants during long-termoperation. The zwitterions with high hydrophilicity are expected to be the critical material to improve theanti-fouling and antibacterial abilities of membranes. Herein, a new zwitterionic polyethersulfone (PES)(zwitterionic PES - ZPES) was synthesized. The as-prepared ZPES was used to fabricate a zwitterionic UFmembrane via the non-solvent induced phase inversion (NIPS) method. Zwitterionic polymer skeletonenhanced the hydrophilicity, permeability and anti-fouling properties of the material. As a result, theZPES membrane exhibited doubled water flux growth (269.6 Lm2h1) compared with that of the PES(125.3 Lm2h1) and high protein rejection (98.6%). Besides, the ZPES membrane could maintain anexcellent flux recovery rate (94.1%) and antibacterial effect (more than 95%). Therefore, the excellentanti-fouling and antibacterial abilities of the ZPES membrane broaden its application scope further.

Preparation and Preliminary Evaluation of Macroporous Magnetic Agarose Particles for Bioseparation

Jia-Li Gu,Hong-Fei Tong,Lai-Yu Sun 한국생물공학회 2017 Biotechnology and Bioprocess Engineering Vol.22 No.1

Macroporous magnetic agarose particles (MMAPs) were prepared with calcium carbonate as the porogent by the water-in-oil suspension thermal regeneration method. MMAPs with good sphericity and appropriate particle size were obtained. The physical properties of the beads were determined and it was found that the water content (92.1%), porosity (94.4%) and mean pore diameter (120.1 nm) of the MMAPs were higher than those for the normal magnetic particles, indicating successful generation of macropores after calcium carbonate addition. Compared with normal magnetic particles, the mass transfer of biomolecules in MMAPs was remarkably enhanced. Finally, MMAPs were modified with 5-amino-benzimidazol (ABI) ligand and the adsorption capacity of IgG reached 153 mg/mL, higher than that of the normal magnetic particles (126 mg/mL). Moreover, adsorption behavior of MMAPs to IgG was little changed after twenty-five recycled use. Hence, MMAPs prepared herein showed great potential for bioseparation.

Use of antibiotics and other treatments in Chinese adults with acute cough: An online survey

Xiao-yang Hu,Ru-yu Xia,Michael Moore,Beth Stuart,Wen Ling-Zi,Bertrand Graz,Lai Lily,Liu Jian-Ping,Yu-tong Fei,Merlin Willcox 한국한의학연구원 2023 Integrative Medicine Research Vol.12 No.1

Background: Acute respiratory tract infections are common worldwide and there has been a rapid in- crease in antibiotic consumption. This study aimed to identify use of various treatments and their as- sociation with the use of antibiotics and patient reported clinical recovery in Chinese adults with acute cough. Methods: An online survey recruiting people who had recently experienced cough was conducted. Their sociodemographic, clinical characteristics, treatments received and their perceived changes in symptoms were collected. Factors influencing avoidance of antibiotics and improvement in symptoms were explored. Results: A total of 22,787 adults with recent acute cough completed the questionnaire, covering all 34 province-level administrative units in China. Most respondents were male (68.0%), young (89.4%, aged 18–45), educated to university/degree or postgraduate level (44.6%), with a median cough severity of 6/10 on a numerical rating scale. Nearly half of the participants (46.4%) reported using antibiotics, among which 93.1% were for presumed upper respiratory tract infections (URTIs). Pharmacies (48.8%) were the most common source of antibiotics. Fewer patients took antibiotics after taking CHM (14.9%), compared to those who started with home remedies (18.0%), or allopathic non-antibiotic medication (25.0%). An- tibiotics, allopathic non-antibiotic medications, CHM and home remedies were all perceived beneficial in relieving cough. Conclusions: Chinese adult responders report use of a considerable variety of treatments alone or in combination for acute cough. Patient-reported clinical recovery was similar regardless of treatment. There is likely a high proportion of inappropriate use of antibiotics for treatment of simple acute cough. As the majority of respondents did not use antibiotics as a first-line, and use of CHM was associated with relief of cough symptoms and reduction in the use of antibiotics, this presents an important opportunity for prudent antibiotic stewardship in China.

Chinese patent herbal medicine (Shufeng Jiedu capsule) for acute upper respiratory tract infections: A systematic review and meta-analysis

Ying-ying Zhang,Ru-yu Xia,Shi-bing Liang,Xiao-yang Hu,Meng-yuan Dai,Yi-lin Li,Le-yi Zhao,Michael Moore,Yu-tong Fei,Jian-ping Liu 한국한의학연구원 2021 Integrative Medicine Research Vol.10 No.3

Background: Shufeng Jiedu capsule has been widely used in China for acute upper respiratory tract infections (AURTIs). The aim of this study was to evaluate its effectiveness and safety for AURTIs. Methods: Randomized controlled trials comparing SFJD with conventional drug for patients with AURTIs were included. Eight databases were searched from their inceptions to February 2021. Data was synthesized using risk ration (RR) or mean difference (MD) with their 95% confidence interval (CI). The primary outcome was resolution time of typical symptoms. Results: Twenty-five RCTs involving 3410 patients were included. SFJD in combination with conventional drug was associated with; in common cold shortening the duration of fever (MD −1.54 days, 95% CI [−2.15,−0.92], I2 = 80%, n = 385, 3 trials) and cough (MD −1.22 days, 95% CI [−1.52, −0.93]); in herpangina, shortening the duration of fever (MD -0.68 days, 95% CI [−1.15, −0.21], I2 = 68%, n = 140, 2 trials) and blistering (MD −0.99 days, 95% CI [−1.23, −0.76], n = 386, 3 trials); in acute tonsillitis and acute pharyngitis shortening the duration of fever (MD −1.13 days, 95% CI [−1.36, −0.90], I2 = 33%, n = 688, 7 trials) and sore throat (MD −1.13 days, 95% CI [−1.40, −0.86], I2 = 84.1%, n = 1194, 10 trials). SFJD also improving their cure rate with a range (1–5 days). No serious adverse events were reported. Conclusion: Low certainty evidence suggests that SFJD appears to shorten the duration of symptoms in AURTIs, improve cure rate and seems safe for application. However, high quality placebo controlled trials are warranted to confirm its benefit.

White organic light-emitting diodes based on benzothiazole derivative

Hui-ying Fu,Xiao-tong Ye,Gao-yu Zhong,Zhi-yang Zhong,Fei Xiao 한국물리학회 2010 Current Applied Physics Vol.10 No.5

This paper describes the white organic light-emitting diodes (WOLEDs) made from a benzothiazole derivative, N-(4-(benzo[d]thiazol-2-yl)phenyl)-N-phenylnaphthalen-1-amine (BPNA). The bright yellowish-white emission was obtained from a non-doped triple-layer device: ITO/NPB (40 nm)/BPNA (50 nm)/Alq3 (40 nm)/LiF/Al. The Commission Internationale de L’Eclairage (CIE) coordinates of the device were (0.24, 0.36) at 10 V. The maximum brightness of the device was 9225 cd/㎡ at 14.4 V. A current efficiency of 3.08 cd/A, a power efficiency of 1.21 lm/W and an external quantum efficiency of 1.18% at a driving current density of 20 mA/㎠ were achieved. WOLED with a DCJTB-doped structure of ITO/TcTa/BPNA/BPNA: DCJTB (0.5%)/BPNA/BCP/Alq3/LiF/Al was fabricated in comparison with the non-doped device. The device emitted bright white light with the CIE coordinates of (0.33, 0.29) at 10 V and a maximum luminance of 7723 cd/㎡ at 14.8 V.

Performance comparisons of two biomarker-based panels for early diagnosis of hepatocellular carcinoma in nonalcoholic fatty liver disease: A multi-institutional case-control analysis

Wei OUYANG,Ming-Cheng GUAN,Si-Yu LIU,Xin-Fei XU,Li-Yang SUN,Ming-Da WANG,Feng SHEN,Xiang-Min TONG,Hong ZHU,Tian YANG 한국간담췌외과학회 2022 Annals of hepato-biliary-pancreatic surgery Vol.26 No.-

Prevalence and Age, Gender and Geographical Area Distribution of Esophageal Squamous Cell Carcinomas in North China from 1985 to 2006

Feng, Xiao-Shan,Yang, Yan-Tong,Gao, She-Gan,Ru, Yi,Wang, Gong-Ping,Zhou, Bo,Wang, Yu-Feng,Zhang, Peng-Fei,Li, Pu-Yu,Liu, Yong-Xuan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.5

Objective: To establish the prevalence and distribution profile of esophageal squamous cell carcinomas (ESCCs) over a 22-yr period in North China. Methods: Using endoscopy for primary diagnosis and histological analysis for the further confirmation, a total of 74,854 ESCC patients aged 20-89 between January 1985 and December 2006 were investigated to analyze the epidemiological profile including prevalence rates, distribution of age-of-onset, gender and geographical area of ESCC in Luoyang, the highest incidence area of North China. Results: A total of 4092 cases of ESCC were finally diagnosed among 74,854 patients who had their first endoscopies. The prevalence among males was higher than that among females (p<0.01), resulting in an overall male:female OR of 1.2 (95%CI, 1.2-1.3). The prevalence in rural areas was higher than in urban areas (p<0.01), resulting in an overall rural:urban OR of 2.6 (95%CI, 2.4-2.9). The rural:urban ORs and the 95% CI increased continuously from 2.6, 2.3-3.0 to 2.7, 2.2-3.3, respectively, for 4 consecutive periods during the 22-yr study period. Moreover, the median age of onset among females was higher than that among males (p<0.01). For both sexes and in both areas, the prevalence rates declined and the median age of onset rose for 4 consecutive periods in the 22-yrs time frame (p<0.01). Conculsions: These data reveal the epidemiological profile of ESCC in the area of North China, and suggest that urban areas and rural people account for a growing proportion of the ESCC patients although the prevalence of ESCC significantly declined and the median age-of-onset postponed over the 22-yrs period. Moreover, the prevalence status of ESCC in rural areas also underlines the need for public health initiatives aimed at reducing risk factors of this fatal disease.

Acupuncture for Treatment of Erectile Dysfunction: A Systematic Review and Meta-Analysis

Bao-yong Lai,Hui-juan Cao,Guo-yan Yang,Li-yan Jia,Suzanne Grant,Yu-tong Fei,Emma Wong,Xin-lin Li,Xiao-ying Yang,Jian-ping Liu 대한남성과학회 2019 The World Journal of Men's Health Vol.37 No.3

ChinaPurpose: To assess the effectiveness and safety of acupuncture for erectile dysfunction (ED).Materials and Methods: We searched six major English and Chinese databases included randomized controlled trials (RCTs) testing acupuncture alone or in combination for ED. Dichotomous data were presented as risk ratio (RR) and continuous data were presented as mean difference (MD) both with 95% confidence interval (CI). The Revman (v.5.3) was used for data analyses. Quality of evidence across studies was assessed by the online GRADEpro tool.Results: We identified 22 RCTs, fourteen of them involving psychogenic ED. Most of the included RCTs had high or unclear risk of bias. There was no difference between electro-acupuncture and sham acupuncture with electrical stimulation on the rate of satisfaction and self-assessment (RR, 1.50; 95% CI, 0.71–3.16; 1 trial). Acupuncture combined with tadalafil appeared to have better effect on increasing cure rate (RR, 1.31; 95% CI, 1.00–1.71; 2 trials), and International Index of Erectile Function-5 scores (MD, 5.38; 95% CI, 4.46–6.29; 2 trials). When acupuncture plus herbal medicine compared with herbal medicine alone, the combination therapy showed significant better improvement in erectile function (RR, 1.68; 95% CI, 1.31–2.15; 7 trials). Only two trials reported facial red and dizziness cases, and needle sticking and pruritus cases in acupuncture group. Conclusions: Low quality evidence shows beneficial effect of acupuncture as adjunctive treatment for people mainly with psychogenic ED. Safety of acupuncture was insufficiently reported. The findings should be confirmed in large, rigorously designed and well-reported trials.