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A Novel Interleaved Non-Isolated Switched-Capacitor Network High Step-Up DC/DC Converter
Xinying Li,Yan Zhang,Pengxiang Zeng,Jinshui Zhang,Jinjun Liu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper introduces a novel interleaved non-isolated high step-up DC/DC converter with switchedcapacitor network. Due to interleaved structure and switched-capacitor network, the proposed converter has the advantage of low input current ripple, high step-up voltage conversion ratio and low voltage stress for all the switches and diodes which means lower voltage level semiconductors and high efficiency. After a detailed comparison with other recent existing topologies, it is clear that the proposed converter has a lower comprehensive cost, higher voltage conversion ratio, and lower output voltage ripple than other converters. The operation principle, steady-state analysis, parameter design for this converter are presented. Finally, experiment results are also presented to demonstrate the effectiveness of the proposed converter.
Biomaterial-Based CRISPR/Cas9 Delivery Systems for Tumor Treatment
Mengmeng Li,Fenglei Chen,Qian Yang,Qinglai Tang,Zian Xiao,Xinying Tong,Ying Zhang,Lanjie Lei,Shisheng Li 한국생체재료학회 2024 생체재료학회지 Vol.28 No.00
CRISPR/Cas9 gene editing technology is characterized by high specificity and efficiency, and has been applied to the treatment of human diseases, especially tumors involving multiple genetic modifications. However, the clinical application of CRISPR/Cas9 still faces some major challenges, the most urgent of which is the development of optimized delivery vectors. Biomaterials are currently the best choice for use in CRISPR/Cas9 delivery vectors owing to their tunability, biocompatibility, and efficiency. As research on biomaterial vectors continues to progress, hope for the application of the CRISPR/Cas9 system for clinical oncology therapy builds. In this review, we first detail the CRISPR/Cas9 system and its potential applications in tumor therapy. Then, we introduce the different delivery forms and compare the physical, viral, and non-viral vectors. In addition, we analyze the characteristics of different types of biomaterial vectors. We further review recent research progress in the use of biomaterials as vectors for CRISPR/Cas9 delivery to treat specific tumors. Finally, we summarize the shortcomings and prospects of biomaterial-based CRISPR/Cas9 delivery systems.
Preparation of mesoporous silica from coal slag and its metal ion adsorption behavior
Xinying Zhang,Yu Wu,Xuefang Li,Xianlong Meng,Huihu Shi,Zhaojun Wu,Jianbin Zhang 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.5
A novel mesoporous silica (MS) with the high specific surface area up to 1,199m2/g was prepared from coal slag by SO3 2 leaching and hydrothermal synthesis. Its application in metal ion removal was explored using Pb2+, Cu2+, Co2+ and Cd2+ as the model ions. The effects of adsorption time, pH, initial metal ion concentration, adsorbent dosage and adsorption temperature on the metal ion adsorption behaviors of the as-prepared MS were systematically, and the maximum adsorption capacities were measured to be 55.76mg·g1, 33.49mg·g1, 24.29mg·g1 and 22.98mg· g1 for Pb2+, Cu2+, Co2+ and Cd2+, respectively. The metal ion adsorption on the as-prepared MS followed pseudo-second- order kinetics, and the adsorption isotherm fitted the Langmuir isotherm model, indicating that the adsorption was spontaneous, endothermic and enthalpy driven.
Improving Public Health Multidimensional Services through the Use of Smart Cloud Model
Li Kai,Yang Hua,Zhang Yunlong,Yang Zhehan,Zhu Yan,XinYing,Meng Qun 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.8
To better understand the practical applications of smart cloud technology in response to public services improvement, this paper researches the application results of Smart Cloud Model Based Public Health Multidimensional Services (SCMBPHMS). Different from the previous studies that focused on the details, this paper establishes a relatively macroscopic large model of SCMBPHMS, we have established a knowledge model based on artificial neural network on the model data processing to sense various users’ data acquisition habits of SCMBPHMS and let Public Health Smart Cloud Service (PHSCS) gaining the function of intelligent mining and data intelligent classification via training library. Finally, we give the example of some important features of SCMBPHMS via PHP language. In future, SCMBPHMS combined with the Residents' Health Card will greatly influence the quality of Public Healthcare Services
Li Xuewen,Liu Zihao,Xu Shendan,Ma Xinying,Zhao Zhezhe,Hu Han,Deng Jiayin,Peng Cheng,Wang Yonglan,Ma Shiqing 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00
Exosomes derived from bone marrow mesenchymal stem cells (BMSC-exos) have been shown triggering osteogenic differentiation and mineralization of MSCs, but exosomes administered via bolus injections are rapidly sequestered and cleared. Therefore, we considered the implant as a new organ of patient’s body and expected to find a method to treat implant with BMSC-exos in vivo directly.A fusion peptide (PEP), as a drug delivery system (DDS) which contained a titanium-binding peptide (TBP) possessing the ability to selectively bind to the titanium surface and another peptide CP05 being able to capture exosomes expertly, is constructed to modify the titanium surface.Both in vitro and in vivo experiments prove PEP retains the ability to bind titanium and exosome simultaneously, and the DDS gain the ability to target exosomes to titanium implants surface following enhancing osseointegration post-implantation. Moreover, the DDS constructed by exosomes of diverse origins shows the similar combination rate and efficiency of therapy.This drug delivery system demonstrates the concept that EXO-PEP system can offer an accurate and efficient therapy for treating implants with long-term effect.
Language Use on Guishan Street in Xinping Yi and Dai Autonomous County, Yuxi City of Yunnan Province
Liu Dairong,Li Xinying 아시아사회과학학회 2020 Jornal of Asia Social Science Vol.1 No.1
Xinping Yi and Dai Autonomous County of Yuxi City in Yunnan Province is a multi-ethnic area with Han, Yi and Dai as the main residents. With the aim of exploring the language use characteristics and its development trend, this paper collected 162 questionnaires concerning with the situation of language use on Guishan Street. Four families from different nationalities are interviewed for case study. In Guishan, the language life shows a bilingual mode, that is, Han dialect is the main language, and ethnic minority languages are subsidiary, while the use of Mandarin is not as frequent as expected. For most people, their proficiency in minority languages is not good enough, but their proficiency in Han dialect is outstanding. We suggest that we should respect the language awareness and language attitudes of all nationalities, and take according measures to promote the further protection of language resources, so as to achieve a more harmonious development of language life.
Xiang Yaoxian,Dai Junxi,Li Yao,You Zongqi,Zhang Junpeng,Huang Xinying,Nie Shuqi,Chen Yujie,Xu Lei,Liu Fengming,Jiang Junjian,Xu Jianguang 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
Neutrophils are the earliest master inflammatory regulator cells recruited to target tissues after direct infection or injury. Although inflammatory factors are present in muscle that has been indirectly disturbed by peripheral nerve injury, whether neutrophils are present and play a role in the associated inflammatory process remains unclear. Here, intravital imaging analysis using spinning-disk confocal intravital microscopy was employed to dynamically identify neutrophils in denervated muscle. Slice digital scanning and 3D-view reconstruction analyses demonstrated that neutrophils escape from vessels and migrate into denervated muscle tissue. Analyses using reactive oxygen species (ROS) inhibitors and flow cytometry demonstrated that enhanced ROS activate neutrophils after denervation. Transcriptome analysis revealed that the vast majority of neutrophils in denervated muscle were of the CXCR2 subtype and were recruited by CXCL1. Most of these cells gradually disappeared within 1 week via P53-mediated apoptosis. Experiments using specific blockers confirmed that neutrophils slow the process of denervated muscle atrophy. Collectively, these results indicate that activated neutrophils are recruited via chemotaxis to muscle tissue that has been indirectly damaged by denervation, where they function in delaying atrophy.
Jie Huang,Xuhua Ye,Wenjun Li,Anqi Shi,Xini Chu,Ziwen Cao,Chao Yao,Xiazhang Li 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.116 No.-
Developing low cost and efficient strategy to eliminate volatile organic compounds (VOCs) are quite urgent and challenging. Herein, CeO2 nanoparticles co-doped with Yb3+ and Er3+ were immobilized on attapulgite clay (ATP) for photothermal catalytic oxidation of toluene. The CeO2:Yb3+, Er3+/ATP exhibited outstanding catalytic activity with low T90 of 295 °C (temperature at 90% degradation), satisfactory stability and highly water resistance. The enhanced photothermal catalytic performance can be attributed to the optimal introduction of Yb3+ and Er3+, which promoted the up-conversion of near-infrared light (NIR) to visible light increasing the light utilization. The defects caused by Yb3+/Er3+ doping facilitated the adsorption of O2, while the active oxygen species generated from the defects and the photoinduced reactive species not only favored the oxidation of toluene in photothermal catalytic process, but also accelerated the reoxidation of reduced catalyst. Notably ATP support provided large specific surface area and abundant adsorption sites for toluene molecules to promote the deep oxidation and hindered the deactivation of catalysts caused by the accumulation of intermediates. In-situ DRIFTS test revealed that the alkoxide and benzoate appeared as the main intermediates, which can be deeply oxidized under light irradiation. Current work provides a new alternative for photothermal catalytic degradation of VOCs.