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m^(5)C RNA甲基化修饰与前庭功能异常和老年性耳聋的相关性研究
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作者 周旭 司峰志 《河北医学》 2026年第1期117-122,共6页
目的:探讨m^(5)C RNA甲基化修饰在前庭功能和老年性耳聋中的相关性。方法:总计24只近交系C57BL/6J小鼠,5月龄(成年小鼠组)、12月龄(中年小鼠组)、20月龄(老年小鼠组)各8只。听觉脑干反应阈值分析评价小鼠听力。DCFH-DA(二氯二氢荧光素-... 目的:探讨m^(5)C RNA甲基化修饰在前庭功能和老年性耳聋中的相关性。方法:总计24只近交系C57BL/6J小鼠,5月龄(成年小鼠组)、12月龄(中年小鼠组)、20月龄(老年小鼠组)各8只。听觉脑干反应阈值分析评价小鼠听力。DCFH-DA(二氯二氢荧光素-乙酰乙酸酯)法测定耳蜗和前庭组织ROS水平。TAMRA探针法测定其中组织线粒体DNA的完整性。m^(5)C RNA甲基化修饰免疫共沉淀法分析小鼠耳蜗和前庭组织GRM7 mRNA m^(5)C水平。Western blot法测定其中NSUN2的水平。结果:与成年小鼠组和中年小鼠组相比,老年小鼠组在8、16和32 kHz时的平均ABR阈值升高(P<0.05);耳蜗组织和前庭组织ROS相对水平均升高(P<0.05);含CD mtDNA占比(%)均降低(P<0.05);NSUN2相对表达水平均降低(P<0.05);GRM7 Input mRNA相对表达水平均降低(P<0.05);GRM7 m^(5)C mRNA相对表达水平降低(P<0.05)。老年小鼠组,与耳蜗组织组相比,前庭组织组ROS相对水平较低(P<0.05),GRM7 Input mRNA和GRM7 m^(5)C mRNA相对表达水平较高(P<0.05)。结论:m^(5)C甲基化修饰RNA水平下调及NSUN2表达水平降低与前庭功能和老年性耳聋相关。 展开更多
关键词 老年性耳聋 前庭功能 C57BL/6J小鼠 m^(5)C RNA甲基化修饰 NOP2/Sun RNA甲基转移酶2
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利妥昔单抗治疗M型磷脂酶A2受体相关特发性膜性肾病的疗效及预后分析
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作者 张凯博 李粲 孔凡武 《中国现代药物应用》 2026年第2期95-98,共4页
目的分析M型磷脂酶A2受体相关特发性膜性肾病运用利妥昔单抗治疗的效果及预后。方法39例M型磷脂酶A2受体相关特发性膜性肾病患者,均运用利妥昔单抗治疗。分析患者的临床疗效以及不良反应发生情况,比较不同时间点实验室指标(24 h尿蛋白... 目的分析M型磷脂酶A2受体相关特发性膜性肾病运用利妥昔单抗治疗的效果及预后。方法39例M型磷脂酶A2受体相关特发性膜性肾病患者,均运用利妥昔单抗治疗。分析患者的临床疗效以及不良反应发生情况,比较不同时间点实验室指标(24 h尿蛋白定量、血肌酐、白蛋白、甘油三酯、免疫球蛋白G)。结果经过12个月随诊,39例患者完全缓解22例、占比56.41%,部分缓解15例、占比38.46%,未缓解2例、占比5.13%;总有效率为94.87%。经过12个月随诊,39例患者出现恶心1例,占比2.56%;呕吐1例,占比2.56%;肝功能异常0例;感染1例,占比2.56%;血糖升高0例。不良反应总发生率为7.69%。治疗后1、3、6、12个月的24 h尿蛋白定量、血肌酐、甘油三酯均较治疗前降低,白蛋白较治疗前升高,治疗后12个月的免疫球蛋白G水平较治疗前升高,有差异(P<0.05)。结论对M型磷脂酶A2受体相关特发性膜性肾病患者运用利妥昔单抗治疗的效果显著,可有效改善实验室相关指标,值得临床推荐。 展开更多
关键词 利妥昔单抗 m型磷脂酶A2受体 特发性膜性肾病 肾功能
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INITIAL COEFFICIENT ESTIMATES FOR SOME SUBCLASSES OF M-FOLD SYMMETRIC BI-UNIVALENT FUNCTIONS 被引量:2
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作者 H.M.SRIVASTAVA S.GABOURY F.GHANIM 《Acta Mathematica Scientia》 SCIE CSCD 2016年第3期863-871,共9页
In the present investigation, we consider two new general subclasses B∑m(T, λ; α)and B^∑m (τ λ;β) of Em consisting of analytic and m-fold symmetric bi-univalent functions in the open unit disk U. For functi... In the present investigation, we consider two new general subclasses B∑m(T, λ; α)and B^∑m (τ λ;β) of Em consisting of analytic and m-fold symmetric bi-univalent functions in the open unit disk U. For functions belonging to the two classes introduced here, we derive non-sharp estimates on the initial coefficients [a-~+ll and │a2+1│. Several connections to some of the earlier known results are also pointed out. 展开更多
关键词 analytic functions bi-univalent functions m-Fold symmetric functions m-Fold symmetric bi-univalent functions
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Coefficient Estimates for a Class of m-fold Symmetric Bi-univalent Function Defined by Subordination 被引量:1
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作者 Guo Dong Tang Huo +2 位作者 Ao En Xiong Liang-peng Ji You-qing 《Communications in Mathematical Research》 CSCD 2019年第1期57-64,共8页
In this paper, we investigate the coefficient estimates of a class of m-fold bi-univalent function de?ned by subordination. The results presented in this paper improve or generalize the recent works of other authors.
关键词 analytic function UNIVALENT function COEFFICIENT estimate m-fold SYmmETRIC bi-univalent function SUBORDINATION
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Chrestenson Spectrum and Auto-Correlation Function of Inverse Permutations of Quick Trickle Permutations
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作者 WANG Jue LI Zhengchao ZHAO Yaqun 《Wuhan University Journal of Natural Sciences》 CAS 2008年第5期587-590,共4页
In this paper, a sufficient and necessary condition of quick trickle permutations is given from the point of inverse permutations. The bridge is built between quick trickle permutations and m-value logic functions. By... In this paper, a sufficient and necessary condition of quick trickle permutations is given from the point of inverse permutations. The bridge is built between quick trickle permutations and m-value logic functions. By the methods of the Chrestenson spectrum of m-value logic functions and the auto-correlation function of m-value logic functions to investigate the Chrestenson spectral characteristics and the auto-correlation function charac- teristics of inverse permutations of quick trickle permutations, a determinant arithmetic of quick trickle permutations is given. Using the results, it becomes easy to judge that a permutation is a quick trickle permutation or not by using computer. This gives a new pathway to study constructions and enumerations of quick trickle permutations. 展开更多
关键词 quick trickle permutation chrestenson spectrum auto-correlation function m-value logic function
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Density functional calculations on the geometric structure and properties of the 3d transition metal atom doped endohedral fullerene M@C_(20)F_(20)(M=Sc-Ni) 被引量:1
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作者 唐春梅 朱卫华 邓开明 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第3期302-305,共4页
This paper uses the generalised gradient approximation based on density functional theory to analyse the geometric structure and properties of the 3d transition metal atom doped endohedral fullerene M@C20F20 (M = Sc... This paper uses the generalised gradient approximation based on density functional theory to analyse the geometric structure and properties of the 3d transition metal atom doped endohedral fullerene M@C20F20 (M = Sc-Ni). The geometric optimization shows that the cage centre is the most stable position for M, forming the structure named as M@C20F20-4. The inclusion energy, zero-point energy, and energy gap calculations tell us that Ni@C20F20-4 should be thermodynamically and kinetically stablest. M@C20F20-4 (M = Sc-Co) possesses high magnetic moments varied from 1 to 6 μB, while Ni@C20F20-4 is nonmagnetic. The Ni-C bond in Ni@C20F20-4 contains both the covalent and ionic characters. 展开更多
关键词 m@C20F20 transition metal magnetic property density functional
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Ostrowski’s Type Inequalities for Generalized(h,m)−Preinvex Functions with Its Applications
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作者 LI Ran LIAN Tie-yan 《Chinese Quarterly Journal of Mathematics》 2024年第3期270-287,共18页
A new concept generalized(h,m)−preinvex function on Yang’s fractal sets is proposed.Some Ostrowski’s type inequalities with two parameters for generalized(h,m)−preinvex function are established,where three local fra... A new concept generalized(h,m)−preinvex function on Yang’s fractal sets is proposed.Some Ostrowski’s type inequalities with two parameters for generalized(h,m)−preinvex function are established,where three local fractional inequalities involving generalized midpoint type,trapezoid type and Simpson type are derived as consequences.Furthermore,as some applications,special means inequalities and numerical quadratures for local fractional integrals are discussed. 展开更多
关键词 Generalized(h m)−preinvex function Hermite−Hadamard inequality Ostrowski inequality Simpson inequality
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Certain <i>pl</i>(<i>m</i>,<i>n</i>)-Kummer Matrix Function of Two Complex Variables under Differential Operator
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作者 Ayman Shehata 《Applied Mathematics》 2013年第1期91-96,共6页
The main aim of this paper is to define and study of a new matrix functions, say, the pl(m,n)-Kummer matrix function of two complex variables. The radius of regularity, recurrence relation and several new results on t... The main aim of this paper is to define and study of a new matrix functions, say, the pl(m,n)-Kummer matrix function of two complex variables. The radius of regularity, recurrence relation and several new results on this function are established when the positive integers p is greater than one. Finally, we obtain a higher order partial differential equation satisfied by the pl(m,n)-Kummer matrix function and some special properties. 展开更多
关键词 HYPERGEOmETRIC mATRIX function pl(m n)-Kummer mATRIX function mATRIX Differential Equation
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Electron Transfer Reaction between M-C_6H_6 and M^+-C_6H_6 Complexes in the Gas Phase: Density Functional Theory Study
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作者 Ai Ping FU, Dong Mei DU, Zheng Yu ZHOU (Department of Chemistry, Qufu Normal University,Shandong. Qufu 273165 State Key Laboratory Crystal Materials Shandong University, Shandong. Jinan 230100) 《Chinese Chemical Letters》 SCIE CAS CSCD 2000年第3期219-222,共4页
DFT/BLYP method is used to theoretically investigate the electron transfer (ET) reactions between M (Li, Na, Mg)-C_6H_6 and M+-C_6H_6 complexes in the gas phase. The geometry optimization of the precursor complexes an... DFT/BLYP method is used to theoretically investigate the electron transfer (ET) reactions between M (Li, Na, Mg)-C_6H_6 and M+-C_6H_6 complexes in the gas phase. The geometry optimization of the precursor complexes and the transition state in the process of ET reaction was performed at 6-31G basis set level. The activation energy. the coupling matrix element and the rate constant of the ET reaction are calculated at semi-quantitative level. 展开更多
关键词 m-C_6H_6 complex density functional theory rate constant.
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Spectral Characteristics of the Best Affine Approach of Multi-Output m-Valued Logical Functions
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作者 ZHAO Yaqun YING Dinghai FENG Dengguo 《Wuhan University Journal of Natural Sciences》 CAS 2007年第1期185-188,共4页
This paper discusses the best affine approach (BAA) of multi-output m-valued logical functions. First, it gives the spectra of rate of accordance between multi-output m-valued logical functions and their affine func... This paper discusses the best affine approach (BAA) of multi-output m-valued logical functions. First, it gives the spectra of rate of accordance between multi-output m-valued logical functions and their affine functions, then analyzes the BAA of multi-output m-valued logical functions and finally gives the spectral characteristics of BAA of multi-output m-valued logical functions. 展开更多
关键词 multi-output m-valued logical functions linear spectrum cyclic spectrum BAA(best affine approach)
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A density functional theory structures, stabilities, and study on size-dependent electronic properties of bimetallic MnAgm (M=Na, Li; n + m ≤ 7) clusters
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作者 孙浩然 邝小渝 +2 位作者 李艳芳 邵鹏 赵亚儒 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期202-210,共9页
The equilibrium geometries, relative stabilities, and electronic properties of MnAgm(M=Na, Li; n + m ≤ 7) as well as pure Agn, Nan, Lin (n ≤ 7) clusters are systematically investigated by means of the density f... The equilibrium geometries, relative stabilities, and electronic properties of MnAgm(M=Na, Li; n + m ≤ 7) as well as pure Agn, Nan, Lin (n ≤ 7) clusters are systematically investigated by means of the density functional theory. The optimized geometries reveal that for 2 ≤ n ≤ 7, there are significant similarities in geometry among pure Agn, Nan, and Lin clusters, and the transitions from planar to three-dimensional configurations occur at n = 7, 7, and 6, respectively. In contrast, the first three-dimensional (3D) structures are observed at n + m = 5 for both NanAgm and LinAgm clusters. When n + m ≥5, a striking feature is that the trigonal bipyramid becomes the main subunit of LinAgm. Furthermore, dramatic odd-even alternative behaviours are obtained in the fragmentation energies, secondorder difference energies, highest occupied and lowest unoccupied molecular orbital energy gaps, and chemical hardness for both pure and doped clusters. The analytic results exhibit that clusters with an even electronic configuration (2, 4, 6) possess the weakest chemical reactivity and more enhanced stability. 展开更多
关键词 mnAgm m=Na Li) clusters density functional theory relative stability
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A density functional theory study on size-dependent structures,stabilities,and electronic properties of bimetallic M_nAg_m(M=Na,Li;n + m≤7) clusters
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作者 孙浩然 邝小渝 +2 位作者 李艳芳 邵鹏 赵亚儒 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期206-214,共1页
The equilibrium geometries,relative stabilities,and electronic properties of Mn Agm(M=Na,Li;n + m ≤ 7) as well as pure Ag n,Na n,Li n(n ≤ 7) clusters are systematically investigated by means of the density functiona... The equilibrium geometries,relative stabilities,and electronic properties of Mn Agm(M=Na,Li;n + m ≤ 7) as well as pure Ag n,Na n,Li n(n ≤ 7) clusters are systematically investigated by means of the density functional theory.The optimized geometries reveal that for 2 ≤ n ≤ 7,there are significant similarities in geometry among pure Ag n,Na n,and Li n clusters,and the transitions from planar to three-dimensional configurations occur at n = 7,7,and 6,respectively.In contrast,the first three-dimensional(3D) structures are observed at n + m = 5 for both Na n Ag m and Li n Ag m clusters.When n + m ≥ 5,a striking feature is that the trigonal bipyramid becomes the main subunit of Li n Ag m.Furthermore,dramatic odd-even alternative behaviours are obtained in the fragmentation energies,secondorder difference energies,highest occupied and lowest unoccupied molecular orbital energy gaps,and chemical hardness for both pure and doped clusters.The analytic results exhibit that clusters with an even electronic configuration(2,4,6) possess the weakest chemical reactivity and more enhanced stability. 展开更多
关键词 mn Agm(m=Na Li) clusters density functional theory relative stability
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SYNTHESIS OF FUNCTIONALIZED CALIX[4]ARENE BEARING [M]DAZOLE MOIETY TO SERVE AS CATALYTIC FUNCTION
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作者 Li Hua YUAN Zhao Hui ZHEN +1 位作者 Shu Hua CHEN Hua Ming ZHAO 《Chinese Chemical Letters》 SCIE CAS CSCD 1991年第11期841-842,共2页
Synthesis of catix[4]arene with one imidazolyl group on the upper rim is presented.
关键词 AS m]DAZOLE mOIETY TO SERVE AS CATALYTIC function SYNTHESIS OF functionALIZED ARENE BEARING CHC
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基于m 6A修饰的环状RNA在脂质代谢中的调控功能 被引量:1
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作者 张笑笑 《中国生物化学与分子生物学报》 北大核心 2025年第2期230-237,共8页
环状RNA(circular RNA,circRNA)是前体信使RNA(pre-messenger RNA,pre-mRNA)经可变剪接产生的单链、共价闭合非编码RNA,具有高稳定性、序列保守性和疾病特异性表达的优势,因此吸引了广大关注。N6甲基腺苷(N6-methyladenosine,m 6A)甲基... 环状RNA(circular RNA,circRNA)是前体信使RNA(pre-messenger RNA,pre-mRNA)经可变剪接产生的单链、共价闭合非编码RNA,具有高稳定性、序列保守性和疾病特异性表达的优势,因此吸引了广大关注。N6甲基腺苷(N6-methyladenosine,m 6A)甲基化发生在N6位置,是包括mRNA和非编码RNA(non-coding RNA,ncRNA)在内的真核生物内部转录修饰中最丰富和保守的一类。CircRNA和m 6A修饰已被证实,在调节脂质代谢在内的多种关键生物过程中发挥重要作用。随着测序技术的飞速发展,在转录物组范围内进行m 6A甲基化修饰的circRNA被广泛报道,并且发现它们参与了脂质代谢过程。即m 6A修饰参与调控circRNA的生物发生、降解、输出和翻译,circRNA也可以通过影响甲基化转移酶、去甲基化酶和甲基化阅读蛋白来调节m 6A修饰调控脂质代谢过程。因此,本文总结了与脂质代谢相关的m 6A修饰、circRNA及两者之间相互作用的最新突破,讨论了m 6A修饰的circRNA通过调控脂质合成、分解及脂质过氧化等脂代谢过程,尤其在脂质合成过程中发挥重要作用。对m 6A修饰的circRNA在脂质代谢中调控功能的综合分析揭示了其在脂质代谢途径中的重要作用,并为未来脂代谢异常相关疾病的研究提供了新的视角和理论依据。 展开更多
关键词 环状RNA m^(6)A修饰 脂质代谢 调控功能
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Quantitative Almost Reducibility and Möbius Disjointness for Analytic Quasiperiodic Schrödinger Cocycles
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作者 Wen Huang Jing Wang +1 位作者 Zhiren Wang Qi Zhou 《Peking Mathematical Journal》 2025年第4期711-765,共55页
Sarnak’s Möbius disjointness conjecture states that Möbius function is disjoint to any zero entropy dynamics.We prove that Möbius disjointness conjecture holds for onefrequency analytic quasi-periodic ... Sarnak’s Möbius disjointness conjecture states that Möbius function is disjoint to any zero entropy dynamics.We prove that Möbius disjointness conjecture holds for onefrequency analytic quasi-periodic cocycles which are almost reducible,which extends(Liu and Sarnak in Duke Math J 164(7):1353–1399,2015;Wang in Invent Math 209:175–196,2017)to the noncommutative case.The proof relies on quantitative version of almost reducibility. 展开更多
关键词 möbius function Quasi-periodic systems Almost reducibility
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区间上M型折线函数的一般迭代性质研究
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作者 张福祥 《商洛学院学报》 2025年第2期39-43,共5页
通过研究折线函数的子区间,利用折线函数在子区间上的性质,同时结合线性函数的迭代公式,给出了折线函数在每一个子区间上经过迭代之后的一般表达式。利用折线函数迭代之后的表达式来判断折点的个数,证明了M型折线函数在迭代过程中折点... 通过研究折线函数的子区间,利用折线函数在子区间上的性质,同时结合线性函数的迭代公式,给出了折线函数在每一个子区间上经过迭代之后的一般表达式。利用折线函数迭代之后的表达式来判断折点的个数,证明了M型折线函数在迭代过程中折点个数保持不变和折点个数增加的定理,还给出了折线函数在满足某些条件下,折线函数经过迭代之后折点的坐标表达式和相关的不动点,进一步丰富了折线函数进行迭代的相关理论,能够更加简单判断M型折线函数迭代之后的折点个数情况和折点的坐标表达式。 展开更多
关键词 折线函数 折点 迭代 m型函数
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Hamy对称函数及其对偶形式的Schur-m幂凸性
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作者 卢万涛 王淑红 《内蒙古民族大学学报(自然科学版)》 2025年第6期77-83,共7页
基于控制理论和Schur凸性理论,根据函数Schur-m幂凸性的判定条件,巧妙利用初等对称函数表示Hamy对称函数,再对Hamy对称函数及其对偶形式求导,利用单调函数的性质,研究Hamy对称函数及其对偶形式的Schur-m幂凸性,并利用Hamy对称函数的商构... 基于控制理论和Schur凸性理论,根据函数Schur-m幂凸性的判定条件,巧妙利用初等对称函数表示Hamy对称函数,再对Hamy对称函数及其对偶形式求导,利用单调函数的性质,研究Hamy对称函数及其对偶形式的Schur-m幂凸性,并利用Hamy对称函数的商构造2个新的对称函数,研究新对称函数的Schur-m幂凸性。 展开更多
关键词 Hamy对称函数 对偶形式 Schur-m幂凸性
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戊肝IgM抗体检测在健康体检中的应用 被引量:1
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作者 喻黑英 《中国现代药物应用》 2025年第8期76-79,共4页
目的分析戊型肝炎(戊肝)免疫球蛋白M(IgM)抗体检测用于健康体检的效果。方法选取10680例健康体检人群为研究对象,均抽取静脉血液开展戊肝IgM抗体检测。统计健康体检人群的戊肝IgM抗体阳性率以及阳性人群2个月后的复检结果,对比不同性别... 目的分析戊型肝炎(戊肝)免疫球蛋白M(IgM)抗体检测用于健康体检的效果。方法选取10680例健康体检人群为研究对象,均抽取静脉血液开展戊肝IgM抗体检测。统计健康体检人群的戊肝IgM抗体阳性率以及阳性人群2个月后的复检结果,对比不同性别以及不同年龄健康体检人群的戊肝IgM抗体阳性率,对比戊肝IgM抗体阳性、阴性人群的肝功能指标[谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)、γ-谷氨酰转肽酶(γ-GT)、总胆红素(TBIL)、直接胆红素(DBIL)、总胆汁酸(TBA)、血氨(NH_(3))]。结果10680例健康体检人群中,戊肝IgM抗体阳性共25例,阳性率为0.23%(25/10680);25例戊肝IgM抗体阳性者2个月后的复检结果显示20例仍为阳性,阳性率为80.00%(20/25)。男性健康体检人群的戊肝IgM抗体阳性率为0.23%,女性健康体检人群的戊肝IgM抗体阳性率为0.24%。不同性别健康体检人群的戊肝IgM抗体阳性率对比无显著差异(P>0.05)。<20岁、21~30岁、31~40岁、41~50岁、>50岁健康体检人群的戊肝IgM抗体阳性率分别为0.18%、0.21%、0.25%、0.23%、0.26%。不同年龄健康体检人群的戊肝IgM抗体阳性率对比无显著差异(P>0.05)。戊肝IgM抗体阳性、阴性人群的ALT、AST、ALP、γ-GT、TBIL、DBIL、TBA、NH3对比无显著差异(P>0.05)。结论健康体检人群中戊肝IgM抗体阳性占据一定比例,2个月后的复检结果显示阳性比例仍然较高,且肝功能基本正常,多为隐匿性感染,需要引起高度重视,积极采取有效措施,以有效遏制戊肝传播。 展开更多
关键词 戊型肝炎 免疫球蛋白m抗体 健康体检 肝功能
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Calculation of Response Function for Bonner Sphere Spectrometer Based on Geant4
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作者 曹靖 蒋小菲 +2 位作者 蒋春雨 曹宏睿 阴泽杰 《Plasma Science and Technology》 SCIE EI CAS CSCD 2015年第1期80-83,共4页
In order to make further studies on fusion neutron diagnosis on HL-2A /HL-2M,we have developed and succeeded in the calculation of the Response Function for a Bonner sphere spectrometer,which consists of eight polyeth... In order to make further studies on fusion neutron diagnosis on HL-2A /HL-2M,we have developed and succeeded in the calculation of the Response Function for a Bonner sphere spectrometer,which consists of eight polyethylene spheres with ^3He proportional counters inside.The response function of the Bonner spectrometer to neutrons is of fundamental importance for its neutron spectrum unfolding procedure and is directly related to the quality of the unfolded spectrum.In this paper,we calculated the response function to neutrons from 10^-9 MeV to100 MeV by Geant4.In order to test the accuracy of the Geant4 simulation,we apply it to measure an ^241Am-Be neutron source,and the measured neutron counts of the spectrometer and simulated counts are found to be highly consistent,with a relative error up to 9.3%.This has proven the calculation of the neutron response of the Bonner sphere spectrometer by Geant4 to be quite accurate. 展开更多
关键词 Bonner sphere spectrometer response function Geant4 HL-2A HL-2m multi-sphere spectrometer monte Carlo ^241Am-Be neutron source
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牛冠状病毒M蛋白的结构特征与免疫学功能分析
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作者 李笨 林广宇 《中国奶牛》 2025年第9期36-41,共6页
牛冠状病毒(BCoV)可引发牛呼吸道和消化道疾病,给养牛业造成重大经济损失。M蛋白作为其关键结构蛋白,对病毒的组装、成熟和释放至关重要,但目前对其结构和功能的研究较少。本研究从NCBI数据库获取BCoV基因组序列,提取M蛋白的核苷酸和氨... 牛冠状病毒(BCoV)可引发牛呼吸道和消化道疾病,给养牛业造成重大经济损失。M蛋白作为其关键结构蛋白,对病毒的组装、成熟和释放至关重要,但目前对其结构和功能的研究较少。本研究从NCBI数据库获取BCoV基因组序列,提取M蛋白的核苷酸和氨基酸序列,运用Mega、ProtParam、DeepTMHMM、SignalP、SOPMA、SwissModel、IEDB等生物信息学工具,分析其氨基酸序列系统发育、理化性质、跨膜结构、二级结构和三级结构及B细胞抗原表位。结果显示,19个毒株的M蛋白序列一致性达99.08%,疏水且稳定,含三个跨膜结构域、无信号肽序列,并筛选出多个潜在抗原表位,如18-23(AIKFLK)、128-134(DMKGRMY)等。本研究揭示了BCoV M蛋白的结构和免疫功能特性,为疫苗设计和抗病毒药物研发提供了理论依据与新靶点。 展开更多
关键词 牛冠状病毒 m蛋白 生物信息学 结构特征 功能分析
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