检索结果-南通市图书馆

维普期刊数据库博看期刊

Comparison of time trends in the incidence of primary liver cancer between China and the United States: an age-period-cohort analysis of the Global Burden of Disease 2019

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2022年第17期135卷 2035-2042页

作者： Zhiyong Zou Zuofeng zhang ce Lu Hui Wang Iinstitute of Child and Adolescent Health School of Public HealthPeking University Health Science CenterBeijing 100191China Department of Epidemiology Fielding School of Public HealthUniversity of CaliforniaLos AngelesCAUSA Department of Epidemiology School of Public HealthNanjing Medical UniversityNanjngJjiangsu 21161China Department of Maternal and Child Health School of Public HealthPeking University Health Science CenterBeijing 100191China

Background::China and the United States(US)ranked first and third in terms of new liver cancer cases and deaths globally in 2020.Therefore,a comprehensive assessment of trends in the incidence of primary liver cancer with four major etiological factors between China and the US during the past 30 years with age-period-cohort(APC)analyses is warranted.Methods::Data were obtained from the Global Burden of Disease 2019,and period/cohort relative risks were estimated by APC modeling from 1990 to 2019.Results::In 2019,there were 211,000 new liver cancer cases in China and 28,000 in the US,accounting for 39.4%and 5.2%of global liver cancer cases,respectively.For China,the age-standardized incidence rate(ASIR)consecutively decreased before 2005 but increased slightly since then,whereas the ASIR continuously increased in the US.Among the four etiological factors of liver cancer,the fastest reduction in incidence was observed in hepatitis B virus-related liver cancer among Chinese women,and the fastest increase was in nonalcoholic steatosis hepatitis(NASH)-related liver cancer among American men.The greatest reduction in the incidence of liver cancer was observed at the age of 53 years in Chinese men(-5.2%/year)and 33 years in Chinese women(-6.6%/year),while it peaked at 58 years old in both American men and women(4.5%/year vs.2.8%/year).Furthermore,the period risks of alcohol-and NASH-related liver cancer among Chinese men have been elevated since 2013.Simultaneously,leveled-off period risks were observed in hepatitis C viral-related liver cancer in both American men and women.Conclusions::Currently,both viral and lifestyle factors have been and will continue to play an important role in the time trends of liver cancer in both countries.More tailored and efficient preventive strategies should be designed to target both viral and lifestyle factors to prevent and control liver cancer.

关键词： Alcohol use-related liver cancer China Global Burden of Disease Hepatitis Hepatitis B virus Hepatitis C Incidence Liver neoplasms Life Style Middle aged Non-alcoholic fatty liverdisease United States

Lithium-induced graphene layer containing Li_(3)P alloy phase to achieve ultra-stable electrode interface for lithium metal anode

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 562-574页

作者： Jia-Xin Chen Guo-Qiang zhang Xian-Ying Qin Kui Lin Zi-Jin Yang Ge-Meng Liang Yue Xia Guo-Bin zhang Hai-Kun Wu Qiu-Chan Cai Hai Lin Bao-Hua Li Shenzhen Key Laboratory on Power Battery Safety Research and Shenzhen Geim Graphene center Tsinghua Shenzhen International Graduate SchoolShenzhen518055China Shenzhen Graphene Innovation center Co. Ltd.Shenzhen518107China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA5005Australia Department of Chemistry City University of Hong KongHong Kong990077China

Uncontrolled growth of lithium dendrite will lead to low Coulombic efficiency and poor cycle stability,which hinders the commercialization of lithium metal batteries.Herein,a novel modified lithium anode with reduced graphene oxide conductive network containing trace lithiophilic phosphorus(P-rGO/Cu)is prepared by electrospraying technique combined with heat treatment process.The rGO layer has a concave and undulating conductive structure,which can significantly improve the effective electrical contact between lithium metal and the current collector,speed up the kinetics of interfacial electron transport and reaction,and improve the resistance of the negative electrode to the internal stress caused by volume change of the lithium,which is advantageous for the stability of the SEI film.The extremely small and uniformly distributed red phosphorus element avoids the volume change caused by lithiation to the maximum extent.Lithiophilic two-phase compound Li_(3)P obtained by alloying P with Li can directionally induce the homogeneous nucleation and dense deposition of lithium metal,address the issue of lithium dendrites and extend the cycle life of the batteries.The obtained P-rGO/Cu exhibits excellent electrochemical performance with an average Coulombic efficiency(ce)of 98%at a current density of 1 mA·cm^(−2) for 400 cycles,and the capacity retention rate of the full cell matched with lithium iron phosphate(LFP)is 83%after 400 cycles at 1C.

关键词： Lithium anode Dendrite-free Lithiophilicity Induced nucleation deposition

EXPERIMENTAL　STUDY　OF　NONLINEAR　VIBRATION　CHARACTERISTICS　OF　AN　ELASTIC　LINKAGE

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 1994年第2期7卷 112-117页

作者： Wang Yuxin zhang ce Lu Xinian(Tianjin University)

A new experimental apparatus is designed to study nonlinear vibration characteristics of flexible mechanisms under excitation with single pumping frequency at fixed position. It is found that the dynamic responses express strongly nonlinear vibration characteristics if the links are flexible enough. There are several harmonic frequencies under first fundamental natural frequency which is determined by finite element method, then the combination harmonic method in nonlinear vibration theory is used to determine the critical speeds of a flexible mechanism, which are verified by the experimental results.

关键词： Mechanism Nonlinear vibration Critical speeds

铝合金阳极氧化膜低温无镍封孔工艺及其封孔性能

在线全文

学校读者我要写书评

暂无评论

电镀与精饰 2024年第1期46卷 20-27页

作者：张策张德忠郭俊灏王成郭涌赵涛王泽武汉材料保护研究所有限公司湖北武汉430030 上海英汇科技发展有限公司上海201814 深圳市原诚精细化工开发有限公司广东深圳518100

为克服传统沸水封孔高能耗和镍盐封孔污染环境的不足,研制了一种无镍低温封孔工艺,其工艺为:锂盐20~30 g/L,氟锆酸盐3.0~5.0 g/L,表面活性剂1.0~2.0 g/L,有机添加剂N 2.0~4.0 mL/L,温度35~55℃,pH 5.0~5.4,封闭时间宜控制在2~3 min/μm... 详细信息

为克服传统沸水封孔高能耗和镍盐封孔污染环境的不足,研制了一种无镍低温封孔工艺,其工艺为:锂盐20~30 g/L,氟锆酸盐3.0~5.0 g/L,表面活性剂1.0~2.0 g/L,有机添加剂N 2.0~4.0 mL/L,温度35~55℃,pH 5.0~5.4,封闭时间宜控制在2~3 min/μm。通过酸浸蚀失重试验和电化学试验法对封孔质量和封孔膜的耐蚀性进行评价。结果表明:采用配制的低温无镍封孔剂进行封闭,膜层酸浸蚀失重<30 mg·dm-2,电化学性能明显改善,其封孔效果优于沸水封孔,略差于常温镍盐封孔。

关键词：铝合金阳极氧化无镍封孔低温

类氦C离子诱发不同金属厚靶原子的K-X射线

在线全文

学校读者我要写书评

暂无评论

物理学报 2024年第4期73卷 136-143页

作者：梅策香张小安周贤明梁昌慧曾利霞张艳宁杜树斌郭义盼杨治虎咸阳师范学院离子束与光物理实验室咸阳712000 中国原子能科学研究院核物理研究所北京102413 中国科学院近代物理研究所兰州730000

利用中国原子能科学研究院HI-13MV串列加速器上提供的动能为15—55 MeV的类氦C离子分别轰击Fe,Ni,Nb和Mo金属厚靶,采用HpGe探测器测量了K-X射线,获得了相应的K-X射线的发射截面.本文中由于各个靶原子外壳层电离度的不同,类氦C离子与Fe,N... 详细信息

利用中国原子能科学研究院HI-13MV串列加速器上提供的动能为15—55 MeV的类氦C离子分别轰击Fe,Ni,Nb和Mo金属厚靶,采用HpGe探测器测量了K-X射线,获得了相应的K-X射线的发射截面.本文中由于各个靶原子外壳层电离度的不同,类氦C离子与Fe,Ni靶原子相互作用发射的K_(β)与K_(α)X射线的分支强度比随入射离子动能增加而减小,而Nb,Mo靶原子发射的K-X射线分支强度比变化不明显.利用厚靶截面公式计算了靶原子K-X射线的发射截面,并与不同的理论模型及质子的结果进行了对比.结果表明随类氦C离子动能的增大,Fe,Ni靶原子发射的K_(β)与K_(α)X射线的总产生截面与考虑多电离的两体碰撞近似修正模型最为符合Nb,Mo靶原子发射的K_(β)与K_(α)X射线的总产生截面与平面波恩近似模型的理论值最为接近.质子与单核子C离子能量相同时,质子比类氦C离子激发不同靶的K-X射线产生截面约小3个数量级.

关键词： X射线粒子束截面两体碰撞近似平面波恩近似

Preoperative prediction of perineural invasion of rectal cancer based on a magnetic resonance imaging radiomics model:A dual-center study

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第16期30卷 2233-2248页

作者： Yan Liu Bai-Jin-Tao Sun Chuan zhang Bing Li Xiao-Xuan Yu Yong Du Department of Radiology The Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Department of Radiology The Affiliated Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina.duyong@***

BACKGROUND Perineural invasion(PNI)has been used as an important pathological indicator and independent prognostic factor for patients with rectal cancer(RC).Preoperative prediction of PNI status is helpful for individualized treatment of RC.Recently,several radiomics studies have been used to predict the PNI status in RC,demonstrating a good predictive effect,but the results lacked generalizability.The preoperative prediction of PNI status is still challenging and needs further study.AIM To establish and validate an optimal radiomics model for predicting PNI status preoperatively in RC patients.METHODS This retrospective study enrolled 244 postoperative patients with pathologically confirmed RC from two independent centers.The patients underwent preoperative high-resolution magnetic resonance imaging(MRI)between May 2019 and August 2022.Quantitative radiomics features were extracted and selected from oblique axial T2-weighted imaging(T2WI)and contrast-enhanced T1WI(T1ce)sequences.The radiomics signatures were constructed using logistic regression analysis and the predictive potential of various sequences was compared(T2WI,T1ce and T2WI+T1ce fusion sequences).A clinical-radiomics(CR)model was established by combining the radiomics features and clinical risk factors.The internal and external validation groups were used to validate the proposed models.The area under the receiver operating characteristic curve(AUC),DeLong test,net reclassification improvement(NRI),integrated discrimination improvement(IDI),calibration curve,and decision curve analysis(DCA)were used to evaluate the model performance.RESULTS Among the radiomics models,the T2WI+T1ce fusion sequences model showed the best predictive performance,in the training and internal validation groups,the AUCs of the fusion sequence model were 0.839[95%confidence interval(CI):0.757-0.921]and 0.787(95%CI:0.650-0.923),which were higher than those of the T2WI and T1ce sequence models.The CR model constructed by combining clinical risk factors had the best predictive

关键词： Rectal cancer Perineural invasion Magnetic resonance imaging Radiomics Nomogram

An experimental and theoretical study on photoluminescence of ce^(3+)-doped ZnS quantum dots and their application in Aspergillus oryzae

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第6期42卷 1020-1028,I0001页

作者： Yan Lei Guangzhi zhang Yitong Yao Gaiqin Zhu Zhong Chen Jiangrong Dan Hua Liu Shuwang Duo School of Materials and Mechanical and Electrical EngineeringJiangxi Science and Technology Normal University Nanchang330013China

ZnS and ZnS:3.125%ce^(3+)(ZSC)quantum dots(QDs)were synthesized by a low-temperature solid-phase method.The crystal structure,photoluminescence(PL)properties of ZSC QDs,and their effects on the growth and kojic acid production of Aspergillus oryzae(A.oryzae)were investigated.It is found that both QDs have a cubic blend structure with the average particle size ranging of 2.75-6.14 nm.ce^(3+)doping not only increases the band gap of ZnS QDs from 3.43 to 3.48 eV,but also increases the PL intensity by about 2.23 times,which is due to the fact that the electron carrier concentration is improved,and then the rate of radiative recombination is increased.The integral emission intensity,biomass,extracellular proteins yield,and kojic acid production of A.oryzae cultured with ZSC(ZnS)QDs are about 4.31(3.23),1.61(1.20),1.12(1.09),and 2.99(1.68)times higher than that of medium without QDs,respectively.

关键词： Zns Quantum dots Doping First-principles calculations Aspergllus oryzae Rare earths

Three-dimensionally ordered macroporous(3DOM) structure promoted the activity and H_(2)O poisoning resistance of ce Mn/3DOM-TiO_(2) catalyst in NH_(3)-SCR

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第3期42卷 523-533,I0004页

作者： Yaqin Hu Shipeng Ding Chenchen Tan Peng Wu Guobo Li Sheng Wang Hongqiang Yang Yaping zhang Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing210096China State Power Environmental Protection Research Institute Nanjing210031China

NH_(3)-SCR is an effective mean of NOxremoval in the non-electric industry, however, the high activation temperature and poor H_(2)O resistance of SCR catalysts posed a barrier to its application. In this work, a series of three-dimensionally ordered macroporous(3DOM) catalysts were synthesized via a colloidal crystal template(CCT) method, and various characterizations were carried out to explore the physicochemical property of catalysts. The experiment results reveal that ce_(0.2)Mn_(0.2)/3DOM-TiO_(2) catalyst presents the excellent low-temperature catalytic activity of nearly 100% at 100℃. Furthermore, the enhanced H_(2)O resistance is achieved, certified by the unaffected NO remove at 150℃ in the participation of 15 vol% H_(2)O. The characterizations results exhibit that the improved dispersion of the active component and enhanced redox ability are conducive to the low-temperature catalytic activity. N_(2) adsorption and desorption experiments indicate that catalyst with 3DOM support possesses a larger pore diameter and specific surface area, which may weaken the condensation of H_(2)O in the microporosity of catalysts and improved the H_(2)O resistance of the catalyst. In situ DRIFTS results manifest that ce_(0.2)Mn_(0.2)/3DOM-TiO_(2) catalyst could not only absorb more NH_(3) and generate more surface-active sites, but inhibit the competitive adsorption between H_(2)O and SCR reactants.

关键词： 3DOM material NH_(3)-SCR H_(2)O resistance Low-temperature cerium Rare earths

小麦对杨树叶锈菌非寄主抗性的组织学观察及基因表达特征分析

在线全文

学校读者我要写书评

暂无评论

植物病理学报 2024年第1期54卷 127-136页

作者：张策郭庆辰庞慧慧张思源尹雯马蕊于丹赵晶西北农林科技大学植物保护学院旱区作物逆境生物学国家重点实验室杨凌712100 西北农林科技大学林学院杨凌712100

杨树叶锈病严重危害杨树生长,种植抗病品种是应对该病害的有效途径。由于病菌变异导致抗性丧失,挖掘新的持久抗病资源成为亟待解决的生产问题。植物非寄主抗性因其广谱和持久的特点为抗病育种提供了新的途径。本文开展了小麦接种杨树叶... 详细信息

杨树叶锈病严重危害杨树生长,种植抗病品种是应对该病害的有效途径。由于病菌变异导致抗性丧失,挖掘新的持久抗病资源成为亟待解决的生产问题。植物非寄主抗性因其广谱和持久的特点为抗病育种提供了新的途径。本文开展了小麦接种杨树叶锈菌(Melampsora larici-populina,Mlp)后的组织学观察和抗病相关基因表达特征等研究。结果发现,杨树叶锈菌在小麦叶片上可以正常萌发,但只有3.7%的芽管可以识别小麦气孔并侵染,少数侵染点可以侵染形成类似气孔下囊乃至侵染菌丝。侵染点位置早期产生的大量活性氧和胼胝质,有效阻止了病菌的进一步侵染,且没有发现明显的细胞坏死,表明小麦对杨树叶锈菌的防卫反应属于I型非寄主抗性。小麦茉莉酸(JA)合成途径中的基因LOX1和AOS1,以及JA信号途径下游的病程相关蛋白基因PR1a基因均受杨树叶锈菌侵染诱导表达,表明JA介导的抗病信号途径参与小麦对杨树叶锈菌的非寄主抗性。本研究为深入揭示小麦对杨树叶锈菌的分子机理奠定了基础。

关键词：小麦非寄主抗性杨树叶锈病茉莉酸活性氧