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Reviewing electrochemical stability of ionic liquids-/deep eutectic solvents-based electrolytes in lithium-ion,lithium-metal and post-lithium-ion batteries for green and safe energy 被引量:2
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作者 Yu Chen Shuzi liu +4 位作者 Zixin Bi zheng li Fengyi Zhou Ruifen Shi Tiancheng Mu 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第6期966-991,共26页
Sustainable energy is the key issue for the environment protection,human activity and economic development.Ionic liquids(ILs)and deep eutectic solvents(DESs)are dogmatically regarded as green and sustainable electroly... Sustainable energy is the key issue for the environment protection,human activity and economic development.Ionic liquids(ILs)and deep eutectic solvents(DESs)are dogmatically regarded as green and sustainable electrolytes in lithium-ion,lithium-metal(e.g.,lithium-sulphur,lithium-oxygen)and post-lithium-ion(e.g.,sodium-ion,magnesium-ion,and aluminum-ion)batteries.High electrochemical stability of ILs/DESs is one of the prerequisites for green,sustainable and safe energy;while easy electrochemical decomposition of ILs/DESs would be contradictory to the concept of green chemistry by adding the cost,releasing volatile/hazardous by-products and hindering the recyclability.However,(1)are ILs/DESs-based electrolytes really electrochemically stable when they are not used in batteries?(2)are ILs/DESs-based electrolytes really electrochemically stable in real batteries?(3)how to design ILs/DESs-based electrolytes with high electrochemical stability for batteries to achieve sustainability and green development?Up to now,there is no summary on this topic,to the best of our knowledge.Here,we review the effect of chemical structure and non-structural factors on the electrochemical stability of ILs/DESs in simulated conditions.More importantly,electrochemical stability of ILs/DESs in real lithium-ion,lithium-metal and post-lithium-ion batteries is concluded and compared.Finally,the strategies to improve the electrochemical stability of ILs/DESs in lithium-ion,lithium-metal and post-lithium-ion batteries are proposed.This review would provide a guide to design ILs/DESs with high electrochemical stability for lithium-ion,lithium-metal and postlithium-ion batteries to achieve sustainable and green energy. 展开更多
关键词 Green solvents Decomposition Sustainable chemistry Lithium-oxygen batteries Lithium-sulphur batteries Sodium-ion batteries
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The influence of inter-band rock on rib spalling in longwall panel with large mining height 被引量:1
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作者 Jiachen Wang Meng li +3 位作者 Zhaohui Wang zheng li Han Zhang Shixiong Song 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第4期427-442,共16页
In order to improve rib stability,failure criteria and instability mode of a thick coal seam with inter-band rock layer are analysed in this study.A three-dimensional mechanical model is established for the rib by con... In order to improve rib stability,failure criteria and instability mode of a thick coal seam with inter-band rock layer are analysed in this study.A three-dimensional mechanical model is established for the rib by considering the rock layer.A safety factor is defined foy the rib,and it is observed that the safety factor exhibits a positive correlation with the thickness and strength of the inter-band rock.A calculation method for determining critical parameters of the rock layer is presented to ensure the rib stability.It is revealed that incomplete propagation of the fracture at the hard rock constitutes a fundamental prerequisite for ensuring the rib stability.The influence of the position of the inter-band rock in the coal seam on failure mechanism of the rib was thoroughly investigated by developing a series of physical models for the rib at the face area.The best position for the inter-band rock in the coal seam is at a height of 1.5 m away from the roof line,which tends to provide a good stability state for the rib.For different inter-band rock positions,two ways of controlling rib by increasing supports stiffness and flexible grouting reinforcement are proposed. 展开更多
关键词 Rib spalling Inter-band rock Large mining height Limit analysis Physical model experiment Numerical simulation
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Exploring non-invasive diagnostics for metabolic dysfunctionassociated fatty liver disease 被引量:1
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作者 Biao Qu zheng li 《World Journal of Gastroenterology》 SCIE CAS 2024年第28期3447-3451,共5页
The population with metabolic dysfunction-associated fatty liver disease(MAFLD)is increasingly common worldwide.Identification of people at risk of progression to advanced stages is necessary to timely offer intervent... The population with metabolic dysfunction-associated fatty liver disease(MAFLD)is increasingly common worldwide.Identification of people at risk of progression to advanced stages is necessary to timely offer interventions and appropriate care.Liver biopsy is currently considered the gold standard for the diagnosis and staging of MAFLD,but it has associated risks and limitations.This has spurred the exploration of non-invasive diagnostics for MAFLD,especially for steatohepatitis and fibrosis.These non-invasive approaches mostly include biomarkers and algorithms derived from anthropometric measurements,serum tests,imaging or stool metagenome profiling.However,they still need rigorous and widespread clinical validation for the diagnostic performance. 展开更多
关键词 Metabolic dysfunction-associated fatty liver disease Non-invasive diagnostics Circulating biomarkers Imaging biomarkers Stool microbial biomarkers
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Fecal microbiota transplantation for treatment of non-alcoholic fatty liver disease:Mechanism,clinical evidence,and prospect 被引量:1
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作者 Xiao-Xia Qiu Sheng-li Cheng +4 位作者 Yan-Hui liu Yu li Rui Zhang Nan-Nan li zheng li 《World Journal of Gastroenterology》 SCIE CAS 2024年第8期833-842,共10页
The population of non-alcoholic fatty liver disease(NAFLD)patients along with relevant advanced liver disease is projected to continue growing,because currently no medications are approved for treatment.Fecal microbio... The population of non-alcoholic fatty liver disease(NAFLD)patients along with relevant advanced liver disease is projected to continue growing,because currently no medications are approved for treatment.Fecal microbiota transplantation(FMT)is believed a novel and promising therapeutic approach based on the concept of the gut-liver axis in liver disease.There has been an increase in the number of pre-clinical and clinical studies evaluating FMT in NAFLD treatment,however,existing findings diverge on its effects.Herein,we briefly summarized the mechanism of FMT for NAFLD treatment,reviewed randomized controlled trials for evaluating its efficacy in NAFLD,and proposed the prospect of future trials on FMT. 展开更多
关键词 Non-alcoholic fatty liver disease Fecal microbiota transplantation Randomized controlled trial MECHANISM EFFICACY
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Enhancing microseismic/acoustic emission source localization accuracy with an outlier-robust kernel density estimation approach
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作者 Jie Chen Huiqiong Huang +4 位作者 Yichao Rui Yuanyuan Pu Sheng Zhang zheng li Wenzhong Wang 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2024年第7期943-956,共14页
Monitoring sensors in complex engineering environments often record abnormal data,leading to significant positioning errors.To reduce the influence of abnormal arrival times,we introduce an innovative,outlier-robust l... Monitoring sensors in complex engineering environments often record abnormal data,leading to significant positioning errors.To reduce the influence of abnormal arrival times,we introduce an innovative,outlier-robust localization method that integrates kernel density estimation(KDE)with damping linear correction to enhance the precision of microseismic/acoustic emission(MS/AE)source positioning.Our approach systematically addresses abnormal arrival times through a three-step process:initial location by 4-arrival combinations,elimination of outliers based on three-dimensional KDE,and refinement using a linear correction with an adaptive damping factor.We validate our method through lead-breaking experiments,demonstrating over a 23%improvement in positioning accuracy with a maximum error of 9.12 mm(relative error of 15.80%)—outperforming 4 existing methods.Simulations under various system errors,outlier scales,and ratios substantiate our method’s superior performance.Field blasting experiments also confirm the practical applicability,with an average positioning error of 11.71 m(relative error of 7.59%),compared to 23.56,66.09,16.95,and 28.52 m for other methods.This research is significant as it enhances the robustness of MS/AE source localization when confronted with data anomalies.It also provides a practical solution for real-world engineering and safety monitoring applications. 展开更多
关键词 Microseismic source/acoustic emission(MS/AE) Kernel density estimation(KDE) Damping linear correction Source location Abnormal arrivals
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Enhancer of Shoot Regeneration 2(ESR2)regulates pollen maturation and vitality in watermelon(Citrullus lanatus)
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作者 Hu Wang lihong Cao +2 位作者 Yalu Guo zheng li Huanhuan Niu 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第10期3506-3521,共16页
Watermelon(Citrullus lanatus)holds global significance as a fruit with high economic and nutritional value.Exploring the regulatory network of watermelon male reproductive development is crucial for developing male st... Watermelon(Citrullus lanatus)holds global significance as a fruit with high economic and nutritional value.Exploring the regulatory network of watermelon male reproductive development is crucial for developing male sterile materials and facilitating cross-breeding.Despite its importance,there is a lack of research on the regulation mechanism of male reproductive development in watermelon.In this study,we identified that ClESR2,a VIIIb subclass member in the APETALA2/Ethylene Responsive Factor(AP2/ERF)superfamily,was a key factor in pollen development.RNA insitu hybridization confirmed significantClESR2 expression in the tapetum and pollen during the later stage of anther development.The pollens of transgenic plants showed major defects in morphology and vitality at the late development stage.The RNA-seq and protein interaction assay confirmed that ClESR2 regulates pollen morphology and fertility by interacting with key genes involved in pollen development at both transcriptional and protein levels.These suggest that Enhancer of Shoot Regeneration 2(ESR2)plays an important role in pollen maturation and vitality.This study helps understand the male reproductive development of watermelon,providing a theoretical foundation for developing male sterile materials. 展开更多
关键词 ESR2 WATERMELON OVEREXPRESSION pollen maturation pollen vitality
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CAOSA-extracted lignin improves enzymatic hydrolysis of cellulose
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作者 Sen Ma zheng li +5 位作者 Jonathan Sperry Xing Tang Yong Sun Lu lin Jian liu Xianhai Zeng 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第7期1101-1111,共11页
The conversion of biomass into sugar platform compounds is very important for the biorefinery industry.Pretreatment is essential to the biomass of the sugar platform,however,the lignin obtained by pretreatment,as a ke... The conversion of biomass into sugar platform compounds is very important for the biorefinery industry.Pretreatment is essential to the biomass of the sugar platform,however,the lignin obtained by pretreatment,as a key part of lignocellulose,generally has a passive effect on the enzymatic hydrolysis of cellulose into sugars.In this study,p-TsOH(p-toluenesulfonic acid),DES(Deep eutectic solvent)and CAOSA(cooking with active oxygen and solid alkali)pretreatment ways were used to fraction lignin from bamboo biomass.After CAOSA treatment,the hydrolysis efficiency of the pulp was 95.57%.Moreover,the effect of different treatment methods on lignin properties was studied and the promotion effect of lignin was investigated by adding it to the cellulose enzymatic hydrolysis system.In this work,the results showed that CAOSA-extracted lignin with lower D(1.31-1.25)had a better adsorption effect on the enzyme protein.p-TsOH-extracted lignin with a larger S/G ratio enhanced the inhibition of enzymatic hydrolysis.In addition,the presence of-COOHs in lignin could reduce its inhibitory effect on cellulose saccharification. 展开更多
关键词 Biomass pretreatment CAOSA Cellulose hydrolysis LIGNIN ENZYME
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Contributors to tidal duration asymmetry with varied coastline configurations on western shelf of Yellow Sea
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作者 Xi Feng zheng li +3 位作者 Hui Feng Jia-yan Yang Shou-peng Xie Wei-bing Feng 《Water Science and Engineering》 EI CAS CSCD 2024年第1期1-12,共12页
Coastal management in China is confronted with an urgent choice between natural restoration and maintenance of existing seawalls and reclaimed land for economic development.A key criterion for making this decision is ... Coastal management in China is confronted with an urgent choice between natural restoration and maintenance of existing seawalls and reclaimed land for economic development.A key criterion for making this decision is the resilience to coastal flooding,which depends on the ability to predict tidal level.Tidal duration asymmetry(TDA)is a key parameter in determination of the arrival and duration of flood tides.This study selected the western inner shelf of the Yellow Sea(WYS)as the study area and investigated the responses of TDA to different shoreline configurations and relative sea level rise.The responses of TDA to shoreline reconstruction yielded spatial variability locally and remotely.In the nearshore area,the responses of TDA to the complex ocean environment mainly originated from the combined functions of reflection,bottom friction,and advection,which controlled the energy transfer from M2 or S2 constituents to their overtides or compound tides.The sensitivity of TDA to coastline typologies was not limited to coastal waters but could stretch over the entire inner shelf.The vulnerability of tidal responses was due to the displacement of the M2 amphidrome of the Kelvin wave on the WYS,which in turn changed tidal energy fluxes over the regime.The relative sea level rise could intensify the feedback of TDA to seawalls and land reclamation. 展开更多
关键词 Tidal duration asymmetry Western inner shelf of Yellow Sea Natural restoration Relative sea level rise Tidal amphidrome
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Preparation of palladium-based catalyst by plasma-assisted atomic layer deposition and its applications in CO_(2) hydrogenation reduction
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作者 唐守贤 田地 +4 位作者 李筝 王正铎 刘博文 程久珊 刘忠伟 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第6期31-39,共9页
Supported Pd catalyst is an important noble metal material in recent years due to its high catalytic performance in CO_(2)hydrogenation.A fluidized-bed plasma assisted atomic layer deposition(FP-ALD) process is report... Supported Pd catalyst is an important noble metal material in recent years due to its high catalytic performance in CO_(2)hydrogenation.A fluidized-bed plasma assisted atomic layer deposition(FP-ALD) process is reported to fabricate Pd nanoparticle catalyst over γ-Al_(2)O_(3)or Fe_(2)O_(3)/γ-Al_(2)O_(3)support,using palladium hexafluoroacetylacetonate as the Pd precursor and H_(2)plasma as counter-reactant.Scanning transmission electron microscopy exhibits that highdensity Pd nanoparticles are uniformly dispersed over Fe_(2)O_(3)/γ-Al_(2)O_(3)support with an average diameter of 4.4 nm.The deposited Pd-Fe_(2)O_(3)/γ-Al_(2)O_(3)shows excellent catalytic performance for CO_(2)hydrogenation in a dielectric barrier discharge reactor.Under a typical condition of H_(2)to CO_(2)ratio of 4 in the feed gas,the discharge power of 19.6 W,and gas hourly space velocity of10000 h^(-1),the conversion of CO_(2)is as high as 16.3% with CH_(3)OH and CH4selectivities of 26.5%and 3.9%,respectively. 展开更多
关键词 atomic layer deposition CO_(2)hydrogenation palladium based catalyst
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Application of three-dimensional speckle tracking technique in measuring left ventricular myocardial function in patients with diabetes
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作者 zheng li Ying Qian +1 位作者 Chun-Yun Fan Yong Huang 《World Journal of Diabetes》 SCIE 2024年第4期783-792,共10页
BACKGROUND Diabetic cardiomyopathy is considered as a chronic complication of diabetes mellitus(DM).Therefore,early detection of left ventricular systolic function(LVSF)damage in DM is essential.AIM To explore the use... BACKGROUND Diabetic cardiomyopathy is considered as a chronic complication of diabetes mellitus(DM).Therefore,early detection of left ventricular systolic function(LVSF)damage in DM is essential.AIM To explore the use of the three-dimensional speckle tracking technique(3D-STI)for measuring LVSF in DM patients via meta-analysis.METHODS The electronic databases were retrieved from the initial accessible time to 29 April 2023.The current study involved 9 studies,including 970 subjects.We carried out this meta-analysis to estimate myocardial function in DM compared with controls according to myocardial strain attained by 3D-STI.RESULTS Night articles including 970 subjects were included.No significant difference was detected in the left ventricular ejection fraction between the control and the diabetic group(P>0.05),while differences in global longitudinal strain,global circumferential strain,global radial strain,and global area strain were markedly different between the controls and DM patients(all P<0.05).CONCLUSION The 3D-STI could be applied to accurately measure early LVSF damage in patients with DM. 展开更多
关键词 Diabetes mellitus Left ventricular systolic dysfunction Three-dimensional speckle tracking echocardiography Meta analysis
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Bioactive constituents and action mechanism of Xiaoyao San for treatment of non-alcoholic fatty liver disease
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作者 Xiao-Xia Qiu zheng li 《World Journal of Hepatology》 2024年第10期1213-1215,共3页
Xiaoyao San(XYS)is a classic Chinese medicine prescription.It is traditionally used to relieve syndrome of“liver stagnation and spleen deficiency”,a common syndrome type in traditional Chinese medicine,through sooth... Xiaoyao San(XYS)is a classic Chinese medicine prescription.It is traditionally used to relieve syndrome of“liver stagnation and spleen deficiency”,a common syndrome type in traditional Chinese medicine,through soothing liver,tonifying spleen,and nourishing blood.Correspondingly,XYS has long application in the treatment of depression,dyspepsia and liver diseases.Given the rising of cutting-edge researches on XYS,there’s a significant need to diligently uncover the bioactive constituents and action mechanisms of XYS for treating non-alcoholic fatty liver disease accordingly. 展开更多
关键词 Xiaoyao San Bioactive constituents MECHANISMS Non-alcoholic fatty liver disease FIBROSIS
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通腑泻肺方对ALI/ARDS大鼠AQP1/a-ENaC表达的影响 被引量:4
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作者 廉富 苏景深 +3 位作者 刘恩顺 郑莉 赵鑫民 陈善夫 《天津中医药》 CAS 2018年第6期442-444,共3页
[目的]探讨通腑泻肺方对ALI/ARDS大鼠肺水肿的可能作用机制。[方法]27只大鼠按体质量随机分为空白组、模型组、中药组,每组9只。模型组与中药组尾静脉注射内毒素8 mg/kg,空白组大鼠静脉注射生理盐水。中药组在造模完成后给予通腑泻肺中... [目的]探讨通腑泻肺方对ALI/ARDS大鼠肺水肿的可能作用机制。[方法]27只大鼠按体质量随机分为空白组、模型组、中药组,每组9只。模型组与中药组尾静脉注射内毒素8 mg/kg,空白组大鼠静脉注射生理盐水。中药组在造模完成后给予通腑泻肺中药灌胃,每次0.01 m L/g,每日1次,共7 d,空白组与模型组予等量生理盐水灌胃。通过病理切片观察各组大鼠肺组织损伤情况,免疫组化染色方法检测肺组织水通道蛋白1(AQP1)和上皮细胞钠通道(a-ENa C)表达。[结果]模型组大鼠肺组织中AQP1和a-ENa C表达水平显著下降(P<0.01);与模型组相比,中药组AQP1和a-ENa C表达显著升高(P<0.05)。[结论]通腑泻肺方能增强ALI/ARDS大鼠AQP1和a-ENa C表达而促进其肺部水液代谢,从而发挥其改善肺水肿的作用。 展开更多
关键词 通腑泻肺方 急性肺损伤 急性呼吸窘迫综合征 水通道蛋白 上皮细胞钠通道
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通腑泻肺法对ALI/ARDS大鼠肠屏障的保护作用 被引量:3
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作者 苏景深 刘恩顺 +3 位作者 孙增涛 郑莉 赵鑫民 陈善夫 《天津中医药》 CAS 2018年第12期931-934,共4页
[目的]探讨通腑泻肺中药对急性肺损伤/急性呼吸窒迫综合征(ALI/ARDS)大鼠肠屏障的保护作用。[方法] 27只大鼠随机分为空白组、模型组、中药组,每组9只。模型组与中药组尾静脉注射内毒素8 mg/kg,空白组大鼠静脉注射生理盐水。中药组在造... [目的]探讨通腑泻肺中药对急性肺损伤/急性呼吸窒迫综合征(ALI/ARDS)大鼠肠屏障的保护作用。[方法] 27只大鼠随机分为空白组、模型组、中药组,每组9只。模型组与中药组尾静脉注射内毒素8 mg/kg,空白组大鼠静脉注射生理盐水。中药组在造模完成后给予通腑泻肺中药灌胃,每次0.01mL/g,每日1次,共7日,空白组与模型组予等量生理盐水灌胃。通过病理切片观察各组大鼠肠组织损伤情况,ELISA法检测大鼠血血浆D-乳酸及DAO水平,免疫组化染色方法方法检测肺组织核转录因子-κB(NF-κB)P65及TLR4表达。[结果]模型组大鼠肠组织镜下可见严重的病理损伤,中药组大鼠肠组织病理损伤减轻。模型组大鼠血浆D-乳酸、DAO明显升高,中药组血浆D-乳酸和DAO降低。模型组大鼠肠组织NF-κB P65和TLR4蛋白表达升高,中药组NF-κB P65和TLR4蛋白表达显著降低。[结论]通腑泻肺中药对ALI/ARDS病理过程中释放的大量炎性细胞因子有抑制作用,改善ALI/ARDS时肠黏膜的缺血缺氧状态,增加肠黏膜血流灌注,减轻肠黏膜细胞损害,降低肠黏膜通透性,对肠黏膜屏障起到保护作用。 展开更多
关键词 通腑泻肺 急性肺损伤 急性呼吸窘迫综合征 肠屏障 大鼠 保护作用
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Common Childhood Masturbation, But Different Sexual Attitudes in Three Male-at-Birth Adolescents: Possible Implications for Sexual Development
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作者 Binggen Zhu zheng li Kayama Jo 《Open Journal of Medical Psychology》 2020年第4期160-167,共8页
Although the child masturbation is recognized as not uncommon behavior, our understanding of normative sexual development in humans is fairly limited. To investigate the possible relationship between early childhood m... Although the child masturbation is recognized as not uncommon behavior, our understanding of normative sexual development in humans is fairly limited. To investigate the possible relationship between early childhood masturbation and subsequent sexual cognition, we retrospectively researched three adolescents who had been reared male and who masturbated in early childhood in similar ways, but had different subsequent sexual cognition. The three young people all recalled primary sexual pleasure from masturbation at age 4 or 5. Their distinctive sexual attitudes could be discerned at age 15 to 20. One was transgender, one was homosexual, and one was heterosexual. Combining recent findings of the neural mechanisms of sexual pleasure and cognition, it can be inferred that the early sexual pleasure in preschoolers might have little significance for the development of sexual cognition in adolescence. 展开更多
关键词 Childhood Masturbation Sexual Attitude Sexual Cognition Sexual Development Adolescents
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神经纤毛因子1在骨折愈合中促进骨-血管偶联的作用
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作者 郑丽 丁一桁 +3 位作者 李新浩 文泽开 姜炳正 林雪霞 《中国组织工程研究》 CAS 北大核心 2025年第21期4576-4583,共8页
背景:神经纤毛因子1在骨折愈合过程中发挥重要作用,尤其是在促进骨-血管偶联方面。骨-血管偶联是骨折愈合过程中的关键事件之一,包括血管(尤其是H型血管)、新骨形成以及它们之间的关联。目的:回顾神经纤毛因子1在骨折愈合过程中促骨-血... 背景:神经纤毛因子1在骨折愈合过程中发挥重要作用,尤其是在促进骨-血管偶联方面。骨-血管偶联是骨折愈合过程中的关键事件之一,包括血管(尤其是H型血管)、新骨形成以及它们之间的关联。目的:回顾神经纤毛因子1在骨折愈合过程中促骨-血管偶联作用的研究进展。方法:在中国知网、PubMed数据库检索1982年1月至2024年4月发表的文献,以“Neuropilin-1,neuropilin 1,NRP1,neuropilin-1,NRP-1,Neuropilin 1,Nrp1,Nrp-1”为检索词,从中选择与骨折愈合、H型血管、动脉、骨细胞、骨-血管偶联关系紧密的文献43篇,增加手工检索的文献24篇,最终得到67篇文献。结果与结论:(1)在骨折愈合过程中骨-血管偶联的关键事件包括血管生成、新骨形成以及它们之间的关联,其中H型血管生成是骨折愈合过程中的关键事件之一,H型血管由血管内皮细胞以及周细胞组成;新骨形成主要是由成骨细胞、破骨细胞以及软骨细胞等骨细胞共同完成的;(2)神经纤毛因子1可以通过血管内皮生长因子和血小板衍生生长因子促进内皮细胞迁移、稳定,增强周细胞稳定性及其与内皮细胞之间的关联,从而促进血管再生;(3)神经纤毛因子1通过促进成骨细胞和软骨细胞形成、抑制破骨细胞生成来促进骨再生;(4)神经纤毛因子1可能是血管和骨偶联的关键因子之一;(5)局部应用神经纤毛因子1及其生物制剂,或将神经纤毛因子1、纳米载药系统以及高分子智能聚合材料等生物工程材料融合,为骨折治疗提供了新思路,有着广阔的应用前景。 展开更多
关键词 神经纤毛因子1 骨折愈合 骨-血管偶联 H型血管 内皮细胞 周细胞 成骨细胞 破骨细胞 软骨细胞
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Prevalent false positives of azoospermia factor a (AZFa) microdeletions caused by single-nucleotide polymorphism rs72609647 in the sY84 screening of male infertility 被引量:14
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作者 Qing Wu Guo-Wu Chen +7 位作者 Tao-Fei Yan Hui Wang Yu-ling liu zheng li Shi-Wei Duan Fei Sun Yun Feng Hui-Juan Shi 《Asian Journal of Andrology》 SCIE CAS CSCD 2011年第6期877-880,共4页
Multiplex polymerase chain reaction (PCR) has been widely used to detect Y-chromosome micredeletions, which is one of the major causes of male infertility. Both the European Academy of Andrology (EAA) and the Euro... Multiplex polymerase chain reaction (PCR) has been widely used to detect Y-chromosome micredeletions, which is one of the major causes of male infertility. Both the European Academy of Andrology (EAA) and the European Molecular Genetics Quality Network (EMQN) have recommended the use of sY84 and sY86 markers for the detection of azoospermia factor a (AZFa) microdeletion during DNA testing for male infertility. In this study, a large-scale analysis of AZF microdeletion in a total of 630 Chinese males, including healthy semen donors (n=200), infertile males with normal sperm count (n=226) and patients with either nonobstructive azoospermia or severe oligozoospermia (n=204), was performed. A series of nine sequence-tagged site (STS) markers from the AZF region of the Y chromosome was used to detect microdeletions. All primers were designed based on the recommendations of the National Center for Biotechnology Information. An unusually high incidence (73/630, 11.6%) of sY84-absent but sY86-present genotypes was observed in the AZFa microdeletion screening. Sequencing the sY84-flanking region revealed a total of 73 patients with sY84-absent but sY86-present genotypes have a T-to-G transversion at the fifth base from the 5' end of the reverse sY84 primer. These prevalent false positives, which were not only observed in infertile men, but also observed in donors, resulted from a single-nucleotide polymorphism (SNP) named rs72609647 in the targeting sequence of the reverse sY84 primer. Our study suggests that a pre-screening of existence of rs72609647 polymorphism can prevent the frequent false positive results of AZFa microdeletions detection in the infertile Chinese males. Given the SNP rs72609647 was recently found in a deep sequencing of a Chinese individual, the current EAA and EMQN standards may need to be scrutinized among different populations to avoid the potential genetic variations in the primer binding sequences. 展开更多
关键词 male infertility multiplex polymerase chain reaction rs72609647 single-nucleotide polymorphism sY84 Y-chromosomemicrodeletion
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"Micro-deletions" of the human Y chromosome and their relationship with male infertility 被引量:24
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作者 zheng li Christopher J Haines Yibing Han 《Journal of Genetics and Genomics》 SCIE CAS CSCD 北大核心 2008年第4期193-199,共7页
The Y chromosome evolves from an autochromosome and accumulates male-related genes including sex-determining region of Y-chromosome (SRY) and several spermatogenesis-related genes. The human Y chromosome (60 Mb lon... The Y chromosome evolves from an autochromosome and accumulates male-related genes including sex-determining region of Y-chromosome (SRY) and several spermatogenesis-related genes. The human Y chromosome (60 Mb long) is largely composed of repetitive sequences that give it a heterochromatic appearance, and it consists of pseudoautosomal, euchromatic, and heterochromatic regions. Located on the two extremities of the Y chromosome, pseudoautosomal regions 1 and 2 (PAR1 and PAR2, 2.6 Mb and 320 bp long, respectively) are homologs with the termini of the X chromosome. The euchromatic region and some of the repeat-rich heterochromatic parts of the Y chromosome are called "male-specific Y" (MSY), which occupy more than 95% of the whole Y chromosome. After evolution, the Y chromosome becomes the smallest in size with the least number of genes but with the most number of copies of genes that are mostly spermatogenesis-related. The Y chromosome is characterized by highly repetitive sequences (including direct repeats, inverted repeats, and palindromes) and high polymorphism. Several gene rearrangements on the Y chromosome occur during evolution owing to its specific gene structure. The consequences of such rearrangements are not only loss but also gain of specific genes. One hundred and fifty three haplotypes have been discovered in the human Y chromosome. The structure of the Y chromosome in the GenBank belongs to haplotype R1. There are 220 genes (104 coding genes, 111 pseudogenes, and 5 other uncategorized genes) according to the most recent count. The 104 coding genes encode a total of about 48 proteins/protein families (including putative proteins/protein families). Among them, 16 gene products have been discovered in the azoospermia factor region (AZF) and are related to spermatogenesis. It has been discovered that one subset of gene rearrangements on the Y chromosome, "micro-deletions", is a major cause of male infertility in some populations. However, controversies exist about different Y chromosome haplotypes. Six AZFs of the Y chromosome have been discovered including AZFa, AZFb, AZFc, and their combinations AZFbc, AZFabc, and partial AZFc called AZFc/gr/gr. Different deletions in AZF lead to different content spermatogenesis loss from teratozoospermia to infertility in different populations depending on their Y haplotypes. This article describes the structure of the human Y chromosome and investigates the causes of micro-deletions and their relationship with male infertility from the view of chromosome evolution. After analysis of the relationship between AZFc and male infertility, we concluded that spermatogenesis is controlled by a network of genes, which may locate on the Y chromosome, the autochromosomes, or even on the X chromosome. Further investigation of the molecular mechanisms underlying male fertility/infertility will facilitate our knowledge of functional genomics. 展开更多
关键词 human Y-chromosome micro-deletion male infertility
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Sperm donation and its application in,China: a 7-year multicenter retrospective study 被引量:9
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作者 Ping Ping Wen-Bing Zhu +7 位作者 Xin-Zong Zhang Yu-Shan li Quan-Xian Wang Xiao-Rong Cao Yong liu Hui-li Dai Yi-Ran Huang zheng li 《Asian Journal of Andrology》 SCIE CAS CSCD 2011年第4期644-648,共5页
Sperm donation in China is different from that in other countries due to cultural, social and political factors. This research presents the current status of sperm donation in China's Mainland and highlights some ... Sperm donation in China is different from that in other countries due to cultural, social and political factors. This research presents the current status of sperm donation in China's Mainland and highlights some problems. Between January 2003 and December 2009, 19 471 sperm donors were screened totally and 6467 donors (33.2%) were recruited. The primary reasons for non-recruitment were either inadequate semen parameters (55.0%) or positive results for sexually transmitted diseases (7.9%). There were 327 (1.7%) qualified donors who withdrew from the program because of frustration related to failed semen parameters, participation merely for free medical tests or job transfer. A questionnaire investigating donor intention, as well as other concerns associated with sperm donation, was distributed to 516 potential donors. All potential donors indicated their primary motivation as altruism, while 90.9% mentioned monetary reward as a second motivating factor. Approximately 93.4% of donors expressed some apprehension about the risk of consanguineous mating and the protection of their identity. Over the past 7 years, 488 389 vials of donors' semen have been cryopreserved. In 36 438 artificial insemination with donor sperm (AID) cycles, the clinical pregnancy rate was 23.9% and the live birth rate was 16.6%, In 7148 in vitro fertilization cycles, the clinical pregnancy rate was 45.8% and the live birth rate was 35.2%. Human sperm banks have been strictly monitored to ensure that each sperm donor can only impregnate five women nationwide. There is still a large gap between the supply and demand for sperm donation which may be solved by updated guidelines. 展开更多
关键词 artificial insemination with donor sperm DONOR in vitro fertilization sperm donation
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APE1 polymorphisms are associated with colorectal cancer susceptibility in Chinese Hans 被引量:8
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作者 Shi-Heng Zhang lin-Ang Wang +7 位作者 zheng li Yu Peng Yan Ping Cun Nan Dai Yi Cheng He Xiao Yan-li Xiong Dong Wang 《World Journal of Gastroenterology》 SCIE CAS 2014年第26期8700-8708,共9页
AIM: To study the association between four base excision repair gene polymorphisms and colorectal cancer risk in a Chinese population.
关键词 Apurinic endonuclease 1 Base excision repair Single nucleotide polymorphisms Colorectal cancer X-ray repair cross-complementing groups
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抗肿瘤分子靶向药物致化疗相关性腹泻的研究进展 被引量:1
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作者 孙雪林 郑丽 +2 位作者 李鸿升 胡欣 张亚同 《中国药房》 CAS 北大核心 2024年第4期506-512,共7页
化疗相关性腹泻(CRD)可导致治疗效果和患者依从性降低,影响肿瘤患者的长期治疗结局,甚至危及生命。除传统化疗药物外,许多分子靶向药物也可导致CRD,包括小分子表皮生长因子受体(EGFR)抑制剂、抗EGFR单克隆抗体、磷酸肌醇3-激酶抑制剂、... 化疗相关性腹泻(CRD)可导致治疗效果和患者依从性降低,影响肿瘤患者的长期治疗结局,甚至危及生命。除传统化疗药物外,许多分子靶向药物也可导致CRD,包括小分子表皮生长因子受体(EGFR)抑制剂、抗EGFR单克隆抗体、磷酸肌醇3-激酶抑制剂、血管内皮细胞生长因子受体小分子抑制剂、BCR-ABL1和KIT抑制剂、人表皮生长因子受体2靶点抑制剂、周期蛋白依赖性激酶抑制剂、抗体-药物偶联物等多种分子靶向药物。其发生机制可能与分子靶向治疗药物引起肠黏膜损伤或肠炎等有关,临床表现为大便频率增加和/或松散不成形,患者常伴有产气过多和/或肠绞痛。不同药物引起的CRD发生率不同,临床应重视病史采集和鉴别诊断,积极干预并进行动态评估,加强患者教育,以及时发现和预防肠毒性的发生。 展开更多
关键词 化疗相关性腹泻 肿瘤 靶向治疗 肠毒性 不良反应
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