Objective:Circular RNAs(circRNAs)have been shown to involve in pathological processes of ischemic stroke(IS),including autophagy.This study was designed to explore the effect of circR-ZC3HC1 on neuronal autophagy in I...Objective:Circular RNAs(circRNAs)have been shown to involve in pathological processes of ischemic stroke(IS),including autophagy.This study was designed to explore the effect of circR-ZC3HC1 on neuronal autophagy in IS and the related mechanisms.Methods:Expression of circR-ZC3HC1 in blood samples of IS patients and healthy controls was detected.Hippocampal neurons were treated with oxygen and glucose deprivation(OGD)to establish IS in vitro model.The expression of LC3 and p62 and the number of autophagosomes were examined to evaluate the autophagy level of OGD induced neurons using western blotting and transmission electron microscope.Cell apoptosis rate and the expression of cleaved caspase-3,Bax,and Bcl-2 were assessed byflow cytometry and western blotting.The binding relationships among circR-ZC3HC1,miR-384-5p,and SIRT1 were predicted and verified.Results:Low expression of circR-ZC3HC1 was found in blood samples of IS patients and OGD-treated neurons.Overexpressed circR-ZC3HC1 or inhibited miR-384-5p expression promoted autophagy and inhibited apoptosis of OGD-treated neurons,which could be reversed by further 3-MA treatment.Mechanistically,circR-ZC3HC1 targeted miR-384-5p to mediate SIRT1 expression.miR-384-5p overexpression or SIRT1 knockdown in the presence of circR-ZC3HC1 overexpression in OGD-treated neurons lead to reduced autophagy and enhanced apoptosis.Conclusion:Collectively,circR-ZC3HC1 promoted neuronal autophagy to attenuate IS via miR-384-5p/SIRT1 axis.展开更多
Using density functional theory, geometries and vibrational frequencies of linear chains NC2nN and HC2n＋1N （n = 1 - 10） have been investigated. Time-dependent density functional theory （TD-DFF） has been used to c...Using density functional theory, geometries and vibrational frequencies of linear chains NC2nN and HC2n＋1N （n = 1 - 10） have been investigated. Time-dependent density functional theory （TD-DFF） has been used to calculate the vertical transition energies and oscillator strengths for the x^1∑g^＋→I^1∑u^＋ transition in NC2,N （n = 1 -10） and X^1∑ → I^1∑^＋ transition in HC2n＋1N （n =1 -7）. On the basis of present calculations, the explicit expressions for the size dependence of the excitation energy and the first adiabatic ionization energy in both carbon chains have been suggested.展开更多
高危型人乳头瘤病毒（high-risk human papillomavirus，HR-HPV）的持续性感染是引起宫颈癌的主要生物学病因[1]。目前，世界卫生组织确认的致癌性HR-HPV主要有13种亚型（16、18、31、33、35、39、45、51、52、56、58、59及68型），不...高危型人乳头瘤病毒（high-risk human papillomavirus，HR-HPV）的持续性感染是引起宫颈癌的主要生物学病因[1]。目前，世界卫生组织确认的致癌性HR-HPV主要有13种亚型（16、18、31、33、35、39、45、51、52、56、58、59及68型），不同地区的主要感染亚型有一定差异[2-3]。研究发现，不同亚型HR-HPV的致癌力、致癌类型及预后有所不同[4]。 HR-HPV负荷量的高低，是否有多重感染，其致癌风险也不一样[5-6]。因此，进行有效的HR-HPV载量-分型联合检测对于宫颈癌的防治有重要意义，但目前能同时提供这2类结果的检测方法存在较高的假阳性率[7]。HC2和Cobas 4800检测系统均为通过美国食品与药品监督管理局（U.S. Food and Drug Administration，FDA）认证的方法，在HR-HPV检测上各具优势，且在HR-HPV的检出率方面具有相似的准确性和良好的一致性[1，8]，提示可将二者联合用于全面评价患者HPV感染情况，但2个实验在国内均属于高价项目，受限于我国居民收入水平，进行大规模临床筛查存在难度。本研究拟对2个检测项目共同的取样环节进行改良性探索，为寻找降低检测成本以减少患者支出的方法，比较了使用经HC2检测预处理过的样本进行分型与分别取样检测时，HC2和Cobas 4800系统检出率的一致性。展开更多
The ductility map of 304HC stainless was determined by using the Gleeble-1500 dynamic thermal-mechanical simulator. The effect of Cu on the hot ductility of 304HC stainless steel was analyzed and the mathematical mode...The ductility map of 304HC stainless was determined by using the Gleeble-1500 dynamic thermal-mechanical simulator. The effect of Cu on the hot ductility of 304HC stainless steel was analyzed and the mathematical model of resistance to deformation was established. The microstructure, inclusion and fracture surface were studied by using the method of micro structure analysis, scanning, energy spectrum and electron microscope. The results show that Cu has effect on the hot ductility, and the hot ductility of 304HC stainless steel decrease with the increase of content of Cu. The deformation temperature also has much effect on the hot ductility, the suitable deformation temperature are 1100-1200℃. The reason of it is that the Cu rich chemical compounds were precipitated from austenite phase during cooling. The Cu rich chemical compounds are brittle substance such as Cu2S, Cu2O and ε-Cu etc.展开更多
In recent years, more and more western films have been introduced into China. With its coming, quite a few people have tried translating the subtitles to help those unfamiliar with foreign languages better understand ...In recent years, more and more western films have been introduced into China. With its coming, quite a few people have tried translating the subtitles to help those unfamiliar with foreign languages better understand the films. Some of their works are good. At the same time, some people have done research concerning FST to successfully put forward some strategies and methods to help those film subtitle translators. They see into FST from different perspectives such as the Skopostheory, the Functional Equivalence theory and the Relevance Theory. However, few people tried researching FST from a cultural perspective.The author decides to probe into FST from an entirely new perspective. In this paper, the author introduces Hall's High and Low Context theory and puts forward four tendencies in FST.展开更多
基金Supported by Ningbo Health Technology Project,Nos.2020Y12 and 2022Y12.
文摘Objective:Circular RNAs(circRNAs)have been shown to involve in pathological processes of ischemic stroke(IS),including autophagy.This study was designed to explore the effect of circR-ZC3HC1 on neuronal autophagy in IS and the related mechanisms.Methods:Expression of circR-ZC3HC1 in blood samples of IS patients and healthy controls was detected.Hippocampal neurons were treated with oxygen and glucose deprivation(OGD)to establish IS in vitro model.The expression of LC3 and p62 and the number of autophagosomes were examined to evaluate the autophagy level of OGD induced neurons using western blotting and transmission electron microscope.Cell apoptosis rate and the expression of cleaved caspase-3,Bax,and Bcl-2 were assessed byflow cytometry and western blotting.The binding relationships among circR-ZC3HC1,miR-384-5p,and SIRT1 were predicted and verified.Results:Low expression of circR-ZC3HC1 was found in blood samples of IS patients and OGD-treated neurons.Overexpressed circR-ZC3HC1 or inhibited miR-384-5p expression promoted autophagy and inhibited apoptosis of OGD-treated neurons,which could be reversed by further 3-MA treatment.Mechanistically,circR-ZC3HC1 targeted miR-384-5p to mediate SIRT1 expression.miR-384-5p overexpression or SIRT1 knockdown in the presence of circR-ZC3HC1 overexpression in OGD-treated neurons lead to reduced autophagy and enhanced apoptosis.Conclusion:Collectively,circR-ZC3HC1 promoted neuronal autophagy to attenuate IS via miR-384-5p/SIRT1 axis.
基金This work was supported by the State Key Laboratory of Physical Chemistry of Solid Surfaces (Xiamen University), NSF of Henan Province and NNSF of China (20173042, 20233020, 20473062, 20021002)
文摘Using density functional theory, geometries and vibrational frequencies of linear chains NC2nN and HC2n＋1N （n = 1 - 10） have been investigated. Time-dependent density functional theory （TD-DFF） has been used to calculate the vertical transition energies and oscillator strengths for the x^1∑g^＋→I^1∑u^＋ transition in NC2,N （n = 1 -10） and X^1∑ → I^1∑^＋ transition in HC2n＋1N （n =1 -7）. On the basis of present calculations, the explicit expressions for the size dependence of the excitation energy and the first adiabatic ionization energy in both carbon chains have been suggested.
文摘高危型人乳头瘤病毒（high-risk human papillomavirus，HR-HPV）的持续性感染是引起宫颈癌的主要生物学病因[1]。目前，世界卫生组织确认的致癌性HR-HPV主要有13种亚型（16、18、31、33、35、39、45、51、52、56、58、59及68型），不同地区的主要感染亚型有一定差异[2-3]。研究发现，不同亚型HR-HPV的致癌力、致癌类型及预后有所不同[4]。 HR-HPV负荷量的高低，是否有多重感染，其致癌风险也不一样[5-6]。因此，进行有效的HR-HPV载量-分型联合检测对于宫颈癌的防治有重要意义，但目前能同时提供这2类结果的检测方法存在较高的假阳性率[7]。HC2和Cobas 4800检测系统均为通过美国食品与药品监督管理局（U.S. Food and Drug Administration，FDA）认证的方法，在HR-HPV检测上各具优势，且在HR-HPV的检出率方面具有相似的准确性和良好的一致性[1，8]，提示可将二者联合用于全面评价患者HPV感染情况，但2个实验在国内均属于高价项目，受限于我国居民收入水平，进行大规模临床筛查存在难度。本研究拟对2个检测项目共同的取样环节进行改良性探索，为寻找降低检测成本以减少患者支出的方法，比较了使用经HC2检测预处理过的样本进行分型与分别取样检测时，HC2和Cobas 4800系统检出率的一致性。
基金This study was financially supported by both the National Natural Science Founda- tion of China (Grant No.59995440)the Natural Science Foundation of Liaoning Province (Grant No.2001101021).
文摘The ductility map of 304HC stainless was determined by using the Gleeble-1500 dynamic thermal-mechanical simulator. The effect of Cu on the hot ductility of 304HC stainless steel was analyzed and the mathematical model of resistance to deformation was established. The microstructure, inclusion and fracture surface were studied by using the method of micro structure analysis, scanning, energy spectrum and electron microscope. The results show that Cu has effect on the hot ductility, and the hot ductility of 304HC stainless steel decrease with the increase of content of Cu. The deformation temperature also has much effect on the hot ductility, the suitable deformation temperature are 1100-1200℃. The reason of it is that the Cu rich chemical compounds were precipitated from austenite phase during cooling. The Cu rich chemical compounds are brittle substance such as Cu2S, Cu2O and ε-Cu etc.
文摘In recent years, more and more western films have been introduced into China. With its coming, quite a few people have tried translating the subtitles to help those unfamiliar with foreign languages better understand the films. Some of their works are good. At the same time, some people have done research concerning FST to successfully put forward some strategies and methods to help those film subtitle translators. They see into FST from different perspectives such as the Skopostheory, the Functional Equivalence theory and the Relevance Theory. However, few people tried researching FST from a cultural perspective.The author decides to probe into FST from an entirely new perspective. In this paper, the author introduces Hall's High and Low Context theory and puts forward four tendencies in FST.
