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Frequently Occurring Reconnection Jets from Sunspot Light Bridges
Tian, Hui,Yurchyshyn, Vasyl,Peter, Hardi,Solanki, Sami K.,Young, Peter R.,Ni, Lei,Cao, Wenda,Ji, Kaifan,Zhu, Yingjie,Zhang, Jingwen,Samanta, Tanmoy,Song, Yongliang,He, Jiansen,Wang, Linghua,Chen, Yaji American Astronomical Society 2018 The Astrophysical journal Vol.854 No.2
Improvement of Scanlan’s Nonlinear Model based on Residual Analysis
Jingwen Yan,Xiaoxia Tian,Qi Zhou,Yanchun Yang 대한토목학회 2019 KSCE JOURNAL OF CIVIL ENGINEERING Vol.23 No.1
Scanlan’s semi-empirical nonlinear model has been widely applied in bridge engineering because of its simplicity. However, it is based on the oscillation displacement, and thus it fails to describe the Vortex-induce Vertical Force (VIVF) on a flat closed-box bridge deck. In the study, in order to better depict VIVFs, a new improved model was proposed. First, the residual of the Vortexinduced Vertical Force (VIVF) is regular and maintains the significant quadratic relation with the VIVF reconstructed by Scanlan’s model, which means Scanlan’s model needs to be improved by adding quadratic terms. Second, an appropriate quadratic term was a dot product of dimensionless displacement and velocity, because this term has a significant linear relation with the reconstructed VIVF in the residual plot, and is independent of the other terms in Scanlan’s model. Furthermore, in lock-in range, the maximum oscillation displacement of a blunt body at different wind speeds was predicted by the proposed model. Simulation results showed that the proposed model is suitable for describing the nonlinearity of the VIVF and well fit the measured data. Due to simplicity, validity, and parameters to be easily identified, the proposed model has potential application in engineering.
Tunable paclitaxel release carrier using diselenide-disulfide balance as regulator
Jingwen Xu,Xiangji Yan,Yue Zhang,Kangsheng Tu,Wen Shen,Zhaoqing Tian,Guoliang Li,Wei Zhao,Mingzhen Zhang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
There are many reasons that lead to the failure of cancer chemotherapy, such as uncontrolled drugrelease, low drug utilization, and severe side effects. To overcome these obstacles, two kinds of thermaland redox-responsive copolymers with multiple diselenide/disulfide linkages, polyethylene glycol -altdiselenodipropionate/disulfhydryldipropionate-b-poly(N-isopropylacrylamide) (abbreviated as PEG-alt-DSeDP-b-PNIPAM and PEG-alt-DSDP-b-PNIPAM) were fabricated by alternative esterification and followingatom transfer radical polymerization. Afterward, these prepared copolymers were mixed in line withthe mass ratio of 8:0, 5:3, 3:5, 0:8 (denoted as S1, S2, S3, and S4, respectively), and self-assembled withpaclitaxel (PTX) to obtain PTX-loaded S1, S2, S3, and S4 nanomicellar assemblies, aiming to realize PTXtunable release using diselenide-disulfide balance as regulator. The chemical structures of these twocopolymers were characterized by gel permeation chromatography, indicating eight diselenide/disulfidelinkages and eight PEG units were contained in these copolymers. Moreover, the thermal-responsiveproperty was detected by UV–vis spectroscopy, meanwhile, the redox responsiveness was observed byTEM in the presence of 10 mM glutathione. We found that 76.90% of PTX was released from S1 nanomicelleswithin 23 h. In contrast, this percentage decreased to 64.53% for S4 nanomicelles even the incubationtime prolonged, indicating explosive and slow release behaviors of S1 and S4 nanomicelles,respectively. In addition, gradually decreased fluorescence intensity around the cellular nucleus wasoccurred from S1 to S4 orderly, which was consistent with cellular uptake and in vivo anti-tumor experiments. Taken together, this work not only provides a strategy for tunable PTX release, but also improveseffectiveness of PTX in cancer treatment.
Kook, Yeon Ji,Tian, Jingwen,Jeon, Yoo Shin,Choi, Min Jung,Song, Jeong Eun,Park, Chan Hum,Reis, Rui L.,Khang, Gilson Informa UK (TaylorFrancis) 2018 Journal of Biomaterials Science. Polymer Edition Vol. No.
<P>Scaffolds mimicking structural and chemical characteristics of the native bone tissues are critical for bone tissue engineering. Herein, we have developed and characterized epigallocatechin gallate/duck's feet collagen/hydroxyapatite (EGCG/DC/HAp) composite sponges that enhanced the bone tissue regeneration. The three-dimensional composite sponges were synthesized by loading various amounts (i.e. 1, 5 and 10M) of EGCG to duck feet derived collagen followed by freeze-drying and then coating with hydroxyapatite. Several measuremental techniques were employed to examine the properties of the as-fabricated composite sponges including morphology and structure, porosity, compressive strength, etc. and as well compared with pristine duck feet derived collagen. SEM observations of EGCG/DC/HAp sponges showed the formation of a highly porous collagen matrix with EGCG embodiment. The porosity and pore size of sponges were found to increase by high EGCG content. The compressive strength was calculated as 3.54 +/- 0.04, 3.63 +/- 0.03, 3.89 +/- 0.05, 4.047 +/- 0.05MPa for 1, 5 and 10M EGCG/DC/HAp sponges, respectively. Osteoblast-like cell (BMSCs isolated from rabbit) culture and in vivo experiments with EGCG/DC/HAp sponges implanted in nude mouse followed by histological staining showed enhanced cell internalization and attachment, cell proliferation, alkaline phosphatase expressions, indicating that EGCG/DC/HAp sponges have ahigh biocompatibility. Moreover, highEGCG content in the EGCG/DC/HAp sponges have led to increased cellular behavior. Collectively, the 5M of EGCG/DC/HAp sponges were suggested as the potential candidates for bone tissue regeneration.</P>
Ho Yeop Lee,Byeong Chang Sim,Ha Thi Nga,Ji Sun Moon,Jingwen Tian,Nguyen Thi Linh,Sang Hyeon Ju,Dong Wook Choi,Daiki Setoyama,이현승 대한내분비학회 2022 Endocrinology and metabolism Vol.37 No.6
Background: An excess of thyroid hormones in Graves’ disease (GD) has profound effects on systemic energy metabolism that are currently partially understood. In this study, we aimed to provide a comprehensive understanding of the metabolite changes that occur when patients with GD transition from hyperthyroidism to euthyroidism with methimazole treatment. Methods: Eighteen patients (mean age, 38.6±14.7 years; 66.7% female) with newly diagnosed or relapsed GD attending the endocrinology outpatient clinics in a single institution were recruited between January 2019 and July 2020. All subjects were treated with methimazole to achieve euthyroidism. We explored metabolomics by performing liquid chromatography-mass spectrometry analysis of plasma samples of these patients and then performed multivariate statistical analysis of the metabolomics data. Results: Two hundred metabolites were measured before and after 12 weeks of methimazole treatment in patients with GD. The levels of 61 metabolites, including palmitic acid (C16:0) and oleic acid (C18:1), were elevated in methimazole-naïve patients with GD, and these levels were decreased by methimazole treatment. The levels of another 15 metabolites, including glycine and creatinine,were increased after recovery of euthyroidism upon methimazole treatment in patients with GD. Pathway analysis of metabolomics data showed that hyperthyroidism was closely related to aminoacyl-transfer ribonucleic acid biosynthesis and branched-chain aminoacid biosynthesis pathways. Conclusion: In this study, significant variations of plasma metabolomic patterns that occur during the transition from hyperthyroidism to euthyroidism were detected in patients with GD via untargeted metabolomics analysis.