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Peipei Wu,Shumei Wang,Qicai Chen,Lili Chen,Pengpeng Zhang,Juan Xiao,Xiaoxiao Chen,Meng Liu 연세대학교의과대학 2017 Yonsei medical journal Vol.58 No.1
Purpose: Elevation in serum alanine aminotransferase (ALT) levels is a biomarker for metabolic syndrome (MS); however, the relationshiphas not been fully investigated within the reference interval of ALT levels. Our objective was to explore the relationship between serum ALT levels within the reference interval and MS in Chinese adults. Materials and Methods: This cross-sectional study included 16028 adults, who attended routine health check-ups at Shengli OilfieldCentral Hospital from January 2006 to March 2012. The reference interval of serum ALT level was defined as less than 40 U/L. Logistic regression models and restricted cubic spline were used to evaluate the association of ALT with MS. Results: The prevalence of MS in the total population was 13.7% (6.4% for females and 18.4% for males). Multiple logistic regressionshowed that ALT levels were positively associated with MS after adjustment for potential confounding factors. The odds ratio of MS in the top quartile was 4.830 [95% confidence interval (CI): 2.980–7.829] in females and 3.168 (95% CI: 2.649–3.790) in males, compared with the ALT levels in the bottom quartile. The restricted cubic spline models revealed a positive non-linear dose-response relationship between ALT levels and the risk of MS in women (p for nonlinearity was 0.0327), but a positive linear dose-response relationship in men (p for nonlinearity was 0.0659). Conclusion: Serum ALT levels within the reference interval are positively associated with MS in a dose-response manner. ElevatedALT levels, even within the reference interval, may reflect early dysmetabolic changes.
Shumei Lou,Guodong Ren,Hui Zhang,Baojia Cheng,Peng Chen 한국섬유공학회 2022 Fibers and polymers Vol.23 No.11
Carbon fiber composites have excellent properties and can be used in automobile, aircraft, rail transit and otherfields of lightweight, but Its price is very expensive. For reducing the cost and improving the comprehensive properties ofmaterials which contain carbon fiber composites and used in the fields mentioned above, carbon fiber (CF) and glass fiber(GF) were mixed to replace pure carbon fiber composites. Three different methods were used to treat the surface of carbonfiber (ultrasonic surface cleaning, liquid phase oxidation of concentrated nitric acid and ultrasonic combined concentratednitric acid oxidation) and different contents of silane coupling agent KH-550 (0 %, 0.2 %, 0.5 %, 1.0 %) were used to treatthe glass fiber, and the laminated plate was prepared by Vacuum Assisted Resin Transfer Molding (VARTM). The CF/GFhybrid composite laminates were prepared by combining the best surface treatment method and the best stacking scheme ofcarbon fiber and glass fiber. The tests of mechanical properties and the observation of SEM fracture morphology show that,the surface treatment of CF by ultrasonic combined concentrated nitric acid oxidation is the best; mechanical properties of GFreinforced composite were the best when surface treatment was carried out with 0.5 % silane coupling agent; Compared withthe untreated samples, the mechanical properties of CF/GF hybrid composite laminates after surface treatment wereimproved, the thickness and weight are reduced. Thus, the weight reduction and better performances were achieved.
Shumei Zhong,Wanying Li,Zixian Wang,Haokun Chen,Yaqi Wu,Chaojie Chong,Zhewen Dong,Jia-Le Song 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
To investigate the effects of AMP on letrozole-induced PCOS rats. All SD rats were randomly divided into normal, PCOS, metformin group (Met, 265 mg/kg) and AMP group (1 g/kg) and weighed every three days. After 21 days of continuous administration, oral glucose tolerance test was performed, and the blood glucose(BP) level was measured. After execution, calculate the relative weight of bilateral ovaries. Serum levels of FSH, LH, E2, T and FINS were detected by ELISA assay. Serum levels of TC, TG, HDL-C and LDL-C were detected by the kit and calculated the LH/FSH ratio and HOMA-IR level. Compared with the normal group, body weight and relative weight of ovaries, BP level and serum levels of T, LH, LH/FSH ratio, FINS, HOMA-IR, TC, TG, LDL-C, and E2, FSH, HDL-C in model group increased. Compared with the PCOS group, body weight in the Met group and AMP group was lower, BP level and serum levels of T, LH, FINS, HOMA-IR and LDL-C in the Met group and AMP group were significantly lower and the level of HDL-C was higher. Armillaria mellea polysaccharides can improve hormone disturbance, glucose metabolism and abnormal lipid level in letrozole-induced polycystic ovary syndrome model rats.
Haokun Chen,Shumei Zhong,Liuling Wu,Yuanfeng Sha,Qiang Qin,Qi Qi Pang,Jia-Le Song 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
Understand the dietary conditions of freshmen in a medical university, and explore the correlation between their dietary patterns and physical fitness levels. A dietary frequency survey was carried out among 2125 freshmen to evaluate their nutrient intake. Factor analysis was performed to extract common factors and determine dietary patterns. According to the "National Standards for Students" Physical health", the freshmen were tested for physical fitness, and the correlation analysis was conducted between the results of physical fitness score and dietary patterns. Four dietary patterns were identified by factor analysis, which were healthy dietary pattern (HDP), high fat and high sugar pattern (HFP/HSP), preserved food pattern and trace element pattern (TEP). Spearman rank correlation analysis showed the HDP and TEP were significantly positively correlated with the fitness test scores (r=0.064,0.062, p< 0.01), while the HFP and HSP was significantly negatively correlated (r=-0.057,p<0.01). Our results suggest that a healthy diet was associated with improved physical fitness performance, while a high intake of fatty and sweetened foods was associated with the opposite.
Preparation and properties of CNTs-Cu hybrids/epoxy superhydrophobic and anticorrosive coatings
Zhongbo Zhu,Shumei Kang,Hua Chen,Qingping Zhao,Zhaokang Huo,Pengyu Li,Qidong Cao,Chenshuo Lu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.119 No.-
In this work, hydrophobized copper powders combined siloxane-modified carbon nanotubes(SHMWCNTs) to obtain intertwined hybrids of carbon nanotubes and copper (CNTs-Cu hybrids), andsuperhydrophobic CNTs-Cu hybrids/epoxy coatings were prepared on the surface of AH36 carbon steelby drop coating. The surface morphology and wettability of coatings were changed by adjusting the ratiosof SHMWCNTs to hydrophobized copper powders. The obtained coating can show a water contact angleof 167.2, a water sliding angle of 2.9, a plant oil contact angle of 134.3, and self-cleaning properties. Thecoating maintains superhydrophobicity after 300 tape-peeling times, exhibiting excellent mechanicaldurability. The fouled area percentages of chlorella on the coating and a pure epoxy resin were 0.23(±0.07)% and 12.18(±1.22)%, respectively, displaying anti-biofouling resistances. The coating has excellentcorrosion resistance, and its corrosion current density reached 9.55 10-8 A/cm2.
Novel magnetorheological brake with self-protection and water cooling for elevators
Hui Huang,Shumei Chen,Kaifeng Chen 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.5
This study aims to design a magnetorheological (MR) brake with self-protection and heat dissipation functions for elevators. Using permanent magnet system technology, the MR brake can not only form a double magnetic field with excitation coils to improve braking torque under normal operation but also provide braking torque for protection in case of power failure. In addition, a cooling channel is designed in the braking shaft of the MR brake to ensure effective heat dissipation of the MR fluid. In this work, the structure, material, and magnetic circuit of the MR brake is first developed. Then, finite element, magnetic field, and thermal field analyses are conducted on the brake. Finally, a prototype of the brake is produced, and its performance is tested. Results show that the braking torque, especially the self-protection function, meets the demands of the elevator; the increase in temperature during braking is minor; and the noise level is low .
Magnusson, Patrik K. E.,Lee, Donghwan,Chen, Xu,Szatkiewicz, Jin,Pramana, Setia,Teo, Shumei,Sullivan, Patrick F.,Feuk, Lars,Pawitan, Yudi Cambridge University Press 2016 TWIN RESEARCH AND HUMAN GENETICS - Vol.19 No.2
<P>Monozygotic (MZ) twins stem from the same single fertilized egg and therefore share all their <I>inherited</I> genetic variation. This is one of the unequivocal facts on which genetic epidemiology and twin studies are based. To what extent this also implies that MZ twins share genotypes in adult tissues is not precisely established, but a common pragmatic assumption is that MZ twins are 100% genetically identical also in adult tissues. During the past decade, this view has been challenged by several reports, with observations of differences in post-zygotic copy number variations (CNVs) between members of the same MZ pair. In this study, we performed a systematic search for differences of CNVs within 38 adult MZ pairs who had been misclassified as dizygotic (DZ) twins by questionnaire-based assessment. Initial scoring by PennCNV suggested a total of 967 CNV discordances. The within-pair correlation in number of CNVs detected was strongly dependent on confidence score filtering and reached a plateau of <I>r</I> = 0.8 when restricting to CNVs detected with confidence score larger than 50. The top-ranked discordances were subsequently selected for validation by quantitative polymerase chain reaction (qPCR), from which one single ~120kb deletion in <I>NRXN1</I> on chromosome 2 (bp 51017111-51136802) was validated. Despite involving an exon, no sign of cognitive/mental consequences was apparent in the affected twin pair, potentially reflecting limited or lack of expression of the transcripts containing this exon in nerve/brain.</P>
Deyu Li,Qin Tong,Yuane Lian,Zhizhong Chen,Yaru Zhu,Weimei Huang,Yang Wen,Qiongyao Wang,Shumei Liang,Man Li,Jianjing Zheng,Zhenhua Liu,Huanxin Liu,Linlang Guo 대한암학회 2021 Cancer Research and Treatment Vol.53 No.4
Purpose Drug resistance is one of the main causes of chemotherapy failure in patients with small cell lung cancer (SCLC), and extensive biological studies into chemotherapy drug resistance are required. Materials and Methods In this study, we performed lncRNA microarray, in vitro functional assays, in vivo models and cDNA microarray to evaluate the impact of lncRNA in SCLC chemoresistance. Results The results showed that KCNQ1OT1 expression was upregulated in SCLC tissues and was a poor prognostic factor for patients with SCLC. Knockdown of KCNQ1OT1 inhibited cell proliferation, migration, chemoresistance and promoted apoptosis of SCLC cells. Mechanistic investigation showed that KCNQ1OT1 can activate transforming growth factor-β1 mediated epithelial-to-mesenchymal transition in SCLC cells. Conclusion Taken together, our study revealed the role of KCNQ1OT1 in the progression and chemoresistance of SCLC, and suggested KCNQ1OT1 as a potential diagnostic and prognostic biomarker in SCLC clinical management.
Junyang Liu,Zixian Wang,Wanying Li,Zhewen Dong,Chaojie Chong,Yaqi Wu,Shumei Zhong,Haokun Chen,Zhiqiang Liu,Qi Qi Pang,Jia-Le Song 한국식품영양과학회 2021 한국식품영양과학회 학술대회발표집 Vol.2021 No.10
To explore the effect of C3G on intestinal mucosal injury in 5-FU induced BALB/c mice. Mice were randomly divided into normal, model and C3G groups. After the last administration, mice were anesthetized, and calculated the thymus and spleen indexes. The ileum was used to stain with H&E observation. Serum levels of IL-1β, IL-6, IL-10 and TNF-α were determined by ELISA kits. Compared with the normal group, the model group had diarrhea, body weight and thymus and spleen index decreased significantly, intestinal villus epithelial cells fell off, crypt structure was destroyed, and inflammatory cell infiltration was observed. The body weight, thymus and spleen indexes of the treatment group and the prevention group decreased less, and the levels of TNF-α, IL-1β and IL-6 were significantly decreased, and the level of IL-10 was significantly increased relative to the model group. The intestinal villi structure was relatively complete, and a small amount of crypt structure was destroyed, with a small amount of inflammatory cell infiltration, which reduced the mucosal damage. The administration of C3G could protect intestinal mucosa from 5-FU-induced injury.