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Sperm acrosin activity may be a useful factor in choosing between ICSI and IVF for infertile male patients

Asian Journal of Andrology 2024年第1期26卷 85-90页

作者： Ye-na Hu liang Hu Xin-Yu Yin Huan Zhang Yang-Qin Peng Gang liu Ge lin wei-na li The Institute of Reproductive and Stem Cell Engineering School of Basic Medical ScienceCentral South UniversityChangsha 410008China Department of Andrology Reproductive and Genetic Hospital of CITiC-XiangyaChangsha 410013China Clinical Research Center for Reproduction and Genetics in Hunan Province Changsha 410013China Hunan Guangxiu Hi-tech life Technology Co. Ltd.Changsha 410013China

The clinical applications of acrosin activity are *** analyzed 61578 male partners in infertile couples who visited the outpatient department of the Reproductive and Genetic Hospital of CITIC-Xiangya(Changsha,China)between August 2014 and December 2019 to determine the reference ranges and thresholds for acrosin activity in infertile Chinese men;to determine whether correlations exist between acrosin activity and age,sperm concentration,sperm morphology,or sperm motility;and to evaluate whether acrosin activity could serve as an effective prognostic indicator for choosing between in vitro fertilization(IvF)and intracytoplasmic sperm injection(icsl)in the *** cut-off value for the normal reference range of acrosin activity for male partners in infertile couples was 24.78μlU per 106 *** was no significant association between acrosin activity and age,sperm concentration,semen volume,total sperm count,progressive motility,or total motile spermatozoa.A weak positive correlation was found between acrosin activity and normal sperm *** was a statistically significant difference in abnormal acrosome morphology between the group with high acrosin activity(>24.78μlU per 106 sperm)and the group with low acrosin activity(lization rate had a high index of abnormal acrosomal morphology at 21.2%,while the group with a high IVF fertilization rate had a low index of 0.2%.At an acrosin activity oflization rate,normal fertilization rate,and good-quality embryo rate for Icsl were significantly higher than those for ***,the most promising application of acrosin activity could be in the selection of IcsI over IVF for infertile male patients with complete fertilization failure or a low fertilization rate.

关键词： acrosin activity fertilization rate ICSI IVF semen parameters

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Formation Mechanism and Binding Energy for Body-Centred Regular Icosahedral Structure of li_(13) Cluster

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Communications in Theoretical Physics 2008年第11期50卷 1225-1228页

作者： liU wei-na li Ping GOU Qing-Quan ZHAO Yan-Ping Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China

The formation mechanism for the body-centred regular icosahedral structure of li13 cluster is proposed. The curve of the total energy versus the separation R between the nucleus at the centre and nuclei at the apexes for this structure of li13 has been calculated by using the method of Gou＇s modified arrangement channel quantum mechanics （MACQM）. The result shows that the curve has a minimal energy of-96.951 39 a.u. at R = 5.46ao. When R approaches to infinity, the total energy of thirteen lithium atoms has the value of-96.564 38 a.u. So the binding energy of lii3 with respect to thirteen lithium atoms is 0.387 01 a.u. Therefore the binding energy per atom for lii3 is 0.029 77 a.u. or 0.810 eV, which is greater than the binding energy per atom of 0.453 eV for li2, 0.494 eV for li3, 0.7878 eV for li4. 0.632 eV for lis, and 0.674 eV for liv calculated by us previously. This means that the li13 cluster may be formed stably in a body-centred regular icosahedral structure with a greater binding energy.

关键词： li13 cluster formation mechanism binding energy

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发热包传热效果及其对冻干鱼肉复水品质的影响

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广东海洋大学学报 2024年第4期44卷 139-146页

作者：郝淑贤韦丽娜魏涯黄卉相欢赵永强岑剑伟王迪李来好中国水产科学研究院南海水产研究所/农业农村部水产品加工重点实验室/国家水产品加工技术研发中心广东广州510300

【目的】探究发热包传热影响因素及其对冻干鱼肉复水品质的影响,为罗非鱼自热产品开发与推广提供参考。【方法】研究热源质量(70、80、90和120 g)、激活剂用量(发热包质量的2.0倍、2.5倍、3.0倍和3.5倍)、内胆材质[聚丙烯(PP)和铝]和环... 详细信息

【目的】探究发热包传热影响因素及其对冻干鱼肉复水品质的影响,为罗非鱼自热产品开发与推广提供参考。【方法】研究热源质量(70、80、90和120 g)、激活剂用量(发热包质量的2.0倍、2.5倍、3.0倍和3.5倍)、内胆材质[聚丙烯(PP)和铝]和环境温度(6、17和25℃)对发热包传热效果的影响,分析自热过程鱼肉复水品质的变化。【结果】随热源质量增加,传热效果显著提高(P 0.05)。10~15 min鱼块内部基本复水,鱼肉中心温度达到90℃以上,复水后鱼肉硬度约为70 g,弹性和咀嚼性影响不显著。【结论】热源质量高于90 g,激活剂用量3.0~3.5倍,铝和PP材质,6℃以上的环境温度均可满足发热要求,此条件下,10~15 min复热时间冻干鱼肉品质较好,符合自热产品速食需求。

关键词：发热包传热效果冻干鱼肉质构

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丛枝菌根真菌提高植物干旱胁迫抗性的研究现状

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中国甜菜糖业 2024年第2期 39-42页

作者：乔巍郭娜王颖张威魏丽娜张煜吕晓红接伟光黑龙江东方学院食品工程学院黑龙江哈尔滨150066 江苏食品药品职业技术学院药学院江苏淮安223023 黑龙江省林业科学研究所黑龙江哈尔滨150081 黑龙江大学生命科学学院农业微生物技术教育部工程研究中心黑龙江省寒区植物基因与生物发酵重点实验室黑龙江省普通高校微生物重点实验室哈尔滨150080

我国是世界上受干旱影响较严重的国家之一,干旱胁迫严重影响着植物尤其是粮食作物的生长,严重制约着粮食产量。尽管植物通过进化或者人工干预,在一定程度上可以自我调节以承受环境因素带来的影响,但其成本和应用领域限制了其大规模推广... 详细信息

我国是世界上受干旱影响较严重的国家之一,干旱胁迫严重影响着植物尤其是粮食作物的生长,严重制约着粮食产量。尽管植物通过进化或者人工干预,在一定程度上可以自我调节以承受环境因素带来的影响,但其成本和应用领域限制了其大规模推广与应用。探索利用微生物缓解干旱胁迫作用,提高粮食作物的产量具有十分重要的经济效益和社会效益。研究者对丛枝菌根真菌与植物根系的共生过程、干旱对植物的不利影响、丛枝菌根真菌提高植物抗旱作用机制及影响因素进行了综述,并对目前丛枝菌根真菌的抗旱研究中存在的问题及发展前景进行了展望。

关键词：丛枝菌根真菌干旱胁迫抗性共生过程作用机制

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Determination of Quercetin Using Tris(2,2'-bipyridyl) ruthenium (Ⅲ) Electrochemiluminescence (ECL) in Flowing Streams

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Chinese Chemical Letters 2006年第11期17卷 1499-1502页

作者： Rong LEI Hu wei liU na li Ke＇An li College of Chemistry and Molecular Engineering Peking University Beijing 100871

Ru（bpy）3^2＋ electrochemiluminescence （ECL） was applied to determine quercetin. It was found that ECL intensity of Ru（bpy）3^2＋ could be enhanced in the presence of quercetin in basic solution, and the enhanced light emission intensity was proportional to the concentration of quercetin over the range of 1×10^-6 mol/L to 2×10^4 mol/L.

关键词： Ru(bpy)3^2+ electrochemalurmnescence quercetm

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Find Better Boolean Functions in the Affine Equivalence Class

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Chinese Quarterly Journal of Mathematics 2005年第4期20卷 395-400页

作者： CHEN wei-hong li na Information Engineering Institute Information Engineering University Zhengzhou 450002 China

The Boolean functions in an affine equivalence class are of the same algebraicdegree and nonlinearity, but may satisfy different order of correlation immunity and propa-gation criterion. A method is presented in this paper to find Boolean functions with higherorder correlation immunity or satisfying higher order propagation criterion in an affine equiv-alence class. 8 AES s-box functions are not better Boolean functions in their affine equiva-lence class.

关键词： Boolean function Walsh spectra balance nonlinearity correlation immunity propagation criterion AES s-box

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CRABP1-mediated non-canonical retinoic acid signaling in motor neurons and neural stem cells

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Neural Regeneration Research 2024年第6期19卷 1169-1170页

作者： li-na wei Department of Pharmacology University of Minnesota Medical SchoolMinneapolisMNUSA

Retinoic acid(RA),the active metabolite of vitamin A(the retinoids),elicits a wide spectrum of biological activities critical to the development and health of most of the organ systems including the nervous systems(Corcoran et al.,2002).The effects of RA are mediated by two very distinct pathways;the first is manifested in the nucleus by binding to a large family of nuclear RA receptors(RARs)to regulate proper expression of RAtargeted genes.

关键词： canonical spectrum critical

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鼻咽癌同步放化疗病人营养不良风险预测模型的构建及验证

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肠外与肠内营养 2024年第2期31卷 73-82页

作者：程婷卢佳美黄婷婷黄晓君杨桂荣李维韦榕飒韦莉娜张妍欣刘杰英广西医科大学第一附属医院放疗科广西南宁530021

目的:建立并验证鼻咽癌同步放化疗病人营养不良风险预测模型。方法:2022年4月~2023年8月,便利选取广西医科大学第一附属医院放疗科收治的430例初治鼻咽癌同步放化疗病人作为研究对象,按入组先后顺序以7:3比例将其分为建模组300例和内部... 详细信息

目的:建立并验证鼻咽癌同步放化疗病人营养不良风险预测模型。方法:2022年4月~2023年8月,便利选取广西医科大学第一附属医院放疗科收治的430例初治鼻咽癌同步放化疗病人作为研究对象,按入组先后顺序以7:3比例将其分为建模组300例和内部验证组130例,选取广西医科大学附属肿瘤医院收治的61例初治鼻咽癌同步放化疗病人作为外部验证组。采用Logistic回归建立风险预测模型并绘制列线图,采用HosmerLemeshow、校准曲线及ROC验证模型拟合优度及预测效果,采用临床决策曲线评估临床效用。结果:Logstic回归分析显示,骨骼肌质量指数、自评焦虑量表评分、匹兹堡睡眠质量问卷评分、中国膳食宝塔评分、规律运动锻炼、消化系统症状群组是鼻咽癌同步放化疗病人发生营养不良的影响因素。建模组中ROC曲线下面积为0.853(95%CI:0.81~0.89),Youden最大值为0.600,对应的特异度为0.764、灵敏度为0.836。Hosmer-Lemeshow检验χ^(2)=4.040,P=0.853,表明模型具有良好的预测能力。校准曲线校显示模型的预测效果与实际概率拟合较好,平均绝对误差为0.024。临床决策曲线的阈值概率为0.05~0.85时,临床净收益率较高。内部验证组受试者操作曲线下面积为0.891,灵敏度为77.36%,特异度为89.61%,实际应用正确率84.62%。外部验证组受试者操作曲线下面积为0.886,灵敏度为76.00%,特异度为83.33%,总体正确率为80.33%。结论:本研究构建的风险预测模型效果较好,可有效预测鼻咽癌同步放化疗病人营养不良的发生率,为临床工作人员制订和实施营养干预措施提供参考依据。

关键词：鼻咽癌同步放化疗营养不良预测模型

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Anomalies of Precipitation over China on Days with Tropical Cyclone Activity over the Bay of Bengal: Role of Moisture Transport

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Journal of Meteorological Research 2024年第2期38卷 368-382页

作者： na wei Ying li Xiaoting FAN nanjing Joint Institute for Atmospheric Sciences Nanjing 210041 State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing 100081 Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences Fudan UniversityShanghai 200433

Tropical cyclones over the Bay of Bengal(BoBTC)affect the precipitation over China,with distinct seasonal and daily *** study quantitatively examines the daily standardized precipitation anomalies(SPAs)over China on the days with BoBTC activities(storm-days)and related circulations,based on rainfall measurements at surface meteorological stations and ECMWF reanalysis data on a 0.25°×0.25°resolution during *** positive SPA is found over the stations in the two adjacent regions around BoB(Southwest China in May/November and southern Tibetan Plateau in October)and three distant regions(Southeast China and the northeastern boundary of the Qinghai-Tibet Plateau in May,and central North China in October).The SPA distributions are remarkably consistent with the integrated water vapor transport(IVT)*** IVT is found associated with the interaction between southwesterly(southerly)of the BoBTC circulation and low-level monsoonal flow in May(midlevel westerly in winter months).The probabilities of extreme precipitation(EP)occurrences over the above regions all increase on *** adjacent regions,EP is significantly correlated with the northward IVT anomalies to the east of BoBTC circulation,which strengthen the water vapor input through the southern *** IVT anomalies are stronger in May,benefited by the deep monsoonal southwesterlies than those in *** distant regions,EP is more closely related to the IVT anomaly extending back from *** moisture from BoB concentrates along a local low-level convergence line over Southeast China,being further facilitated by coexistence of the BoBTC depression and midlevel westerly trough in *** results highlight the interactions between BoBTCs and local weather systems that influence the general precipitation anomalies and occurrence of EP over China,especially over distant regions.

关键词： tropical cyclone Bay of Bengal precipitation anomaly moisture transport

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Dynamic Response Impact of Vehicle Braking on Simply Supported Beam Bridges with Corrugated Steel Webs Based on Vehicle-Bridge Coupled Vibration Analysis

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 3467-3493页

作者： Yan Wang Siwen li na wei School of Civil Engineering Zhengzhou UniversityZhengzhou450001China

A novel approach for analyzing coupled vibrations between vehicles and bridges is presented,taking into account spatiotemporal effects and mechanical phenomena resulting fromvehicle *** modeling and solution of bridge vibrations induced by vehicle deceleration are realized using this *** method’s validity and reliability are substantiated through numerical examples.A simply supported beam bridge with a corrugated steel web is taken as an example and the effects of parameters such as the initial vehicle speed,braking acceleration,braking location,and road surface roughness on the mid-span displacement and impact factor of the bridge are *** results show that vehicle braking significantly amplifies mid-span displacement and impact factor responses in comparison to uniform vehicular motion across the ***,the influence of wheelto-bridge friction forces is of particular significance and cannot be *** the vehicle initiates braking near the middle of the span,both the mid-span displacement and impact factor of the bridge exhibit substantial increases,further escalating with higher braking *** favorable road surface conditions,the midspan displacement and the impact factor during vehicle braking may exceed the design values stipulated by *** is important to note that road surface roughness exerts a more pronounced effect on the impact factor of the bridge in comparison to the effects of vehicle braking.

关键词： Corrugated steel web girder bridges simply supported beam bridges vehicle-bridge coupled vibration braking impact factor

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