检索结果-南通市图书馆

Interference of harmonics emitted by different tunneling momentum channels in laser fields

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第9期33卷 366-372页

作者： Ling-Yu Zhang Zhuo-Xuan Xie can Wang Xin-lei Ge Jing Guo Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China College of Physical Science and Technology Bohai UniversityJinzhou 121013China

By numerically solving the semiconductor Bloch equation(SBEs),we theoretically study the high-harmonic generation of ZnO crystals driven by one-color and two-color intense laser *** results show the enhancement of harmonics and the cut-off remains the same in the two-color field,which can be explained by the recollision trajectories and electron excitation from *** on the quantum path analysis,we investigate contribution of different ranges of the crystal momentum k of ZnO to the harmonic yield,and find that in two-color laser fields,the intensity of the harmonic yield of different ranges from the crystal momentum makes a big difference and the harmonic intensity is depressed from all k channels,which is related to the interferences between harmonics from symmetric k channels.

关键词： high-order harmonic generation the semiconductor Bloch equation k-resolvedinter-bandhar-monic spectrum four-step semiclassical model

Magnetron sputtering deposition of silicon nitride on polyimide separator for high-temperature lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第5期30卷 1-10页

作者： can Liao Wei Wang Junling Wang Longfei Han Shuilai Qiu lei Song Zhou Gui Yongchun Kan Yuan Hu State Key Laboratory of Fire Science University of Science and Technology of ChinaHefei 230026AnhuiChina

To date,lithium-ion batteries are becoming increasingly significant in the application of portable devices and electrical vehicles,and revolutionary progress in theoretical research and industrial application has been ***,the commercial polyolefin separators with unsatisfying electrolytes affinity and poor thermal stability have extremely restricted the further application of lithium-ion batteries,especially in the high-temperature *** this work,magnetron sputtering deposition technique is employed to modify the commercial polyimide separator by coating silicon nitride on both *** sputtering deposition modified polyimide(MSD-PI)composite separator shows high thermal stability and ionic *** importantly,compared with the cells using Celgard separator,the cells with MSD-PI separator exhibit superior electrochemical performance,especially long-term cycle performance under high temperature environment,owing to the high thermal conductivity of surface Si3 N4 ***,lithium-ion batteries with MSD-PI separator are capable of improving thermal safety and capacity retention,which demonstrates that magnetron sputtering deposition technique could be regarded as a promising strategy to develop advanced organic/inorganic composite separators for high-temperature lithium-ion batteries.

关键词： Polyimide Magnetron sputtering deposition Lithium-ion batteries High temperature Safety

上海金山区医疗机构环境表面病原菌种类分布调查

在线全文

学校读者我要写书评

暂无评论

中国卫生检验杂志 2021年第9期31卷 1109-1112页

作者：阙凤霞蔡光钟海明宋灿磊叶玉龙上海市金山区疾病预防控制中心上海201500

目的了解上海金山区综合性医疗机构环境表面病原菌种类分布,建立病原菌谱。方法对本区14家医疗机构环境样本(包括物体表面、医护人员手、空气)采样,全自动微生物鉴定仪VITEK 2 Compact鉴定。结果采集物体表面、医护人员手1 462份,检... 详细信息

目的了解上海金山区综合性医疗机构环境表面病原菌种类分布,建立病原菌谱。方法对本区14家医疗机构环境样本(包括物体表面、医护人员手、空气)采样,全自动微生物鉴定仪VITEK 2 Compact鉴定。结果采集物体表面、医护人员手1 462份,检出病原菌194株。革兰阳性菌136株,占70. 10%,以葡萄球菌为主。革兰阴性菌53株。霉菌5株。二级医院检出率为6. 6%,明显低于社区医院检出率(11. 98%),差异有统计学意义(χ^(2)=6. 90,P <0. 01)。医护人员手与物体表面检出无差异。Ⅱ类、Ⅲ类、Ⅳ类环境检出率分别为10. 42%、14. 41%、7. 22%,差异有统计学意义(χ^(2)=18. 93,P <0. 01)。物体表面检出中,以门把手检出病原菌最多,医生手机检出率最高。空气采样标本224份,合格率为85. 71%。结论上海金山区医疗机构环境表面病原菌以革兰阳性菌为主,多数菌株为条件致病菌,提示应增强医疗机构环境消毒,预防院内感染。

关键词：医疗机构环境病原菌种类病原菌谱院内感染

甲型乙型肝炎联合疫苗免疫后的甲肝免疫效果观察

在线全文

学校读者我要写书评

暂无评论

浙江预防医学 2014年第12期26卷 1189-1192页

作者：刘灿磊姚军施海云陈丹尚建斌尹银香罗萍玉环县疾病预防控制中心浙江玉环317600 浙江省疾病预防控制中心

目的评价儿童不同剂次甲型乙型肝炎联合疫苗免疫后甲型肝炎的免疫效果。方法随机选择玉环县户籍5～14岁儿童，其中326名儿童免疫1剂次甲型乙型肝炎联合疫苗，228名儿童免疫3剂次甲型乙型肝炎联合疫苗。分别于免疫前、1剂组免后6个月、3... 详细信息

目的评价儿童不同剂次甲型乙型肝炎联合疫苗免疫后甲型肝炎的免疫效果。方法随机选择玉环县户籍5～14岁儿童，其中326名儿童免疫1剂次甲型乙型肝炎联合疫苗，228名儿童免疫3剂次甲型乙型肝炎联合疫苗。分别于免疫前、1剂组免后6个月、3剂组第3针免后1个月采集静脉血，分离血清后检测甲肝抗体。结果儿童免疫甲型乙型肝炎联合疫苗后甲肝抗体阳性率为100．00％。甲肝抗体阳性对象中免疫1剂组与免疫3剂组甲肝抗体IgG浓度中位数免疫前分别为8．330、7．130mlU／mL，免疫后分别为13．410、14．640mlU／mL，两组免疫前后比较差异均有统计学意义（P〈0．叭）；甲肝抗体阴性对象中免疫l剂组与3剂组甲肝抗体IgG浓度中位数免疫前分别为0．380、0．330mlU／mL；免疫后分别为8．700、13．550mlU／mL，两组免疫后甲肝抗体IgG水平均分别高于免疫前，差异均有统计学意义（P〈0．01）。结论5岁以上儿童免疫1剂或3剂甲型乙型肝炎联合疫苗后，1个月和6个月均显示有效的免疫反应。

关键词：儿童甲型乙型肝炎联合疫苗免疫效果

在线全文

学校读者我要写书评

暂无评论

血浆脑钠肽水平对冠心病诊断价值的初步探讨

现代检验医学杂志 2006年第3期21卷 58-60页

作者：徐焰彭道荣陈灿磊张小宁余妍孙怡群郝晓柯第四军医大学西京医院检验科陕西西安710032 第三军医大学检验医学系重庆400000

目的通过检测观察冠心病患者血浆中脑钠肽（BNP）水平的改变,并与其肌钙蛋白I（cTnI）水平和高敏感性C反应蛋白（hs CRP）水平变化相比较,初步探讨将BNP作为冠心病临床诊断和治疗的标志物的可靠性.方法 2004年3～11月,以分层随机抽样法... 详细信息

目的通过检测观察冠心病患者血浆中脑钠肽（BNP）水平的改变,并与其肌钙蛋白I（cTnI）水平和高敏感性C反应蛋白（hs CRP）水平变化相比较,初步探讨将BNP作为冠心病临床诊断和治疗的标志物的可靠性.方法 2004年3～11月,以分层随机抽样法获取西安地区健康人群血浆样本195份（男性132名,女性63名）,西京医院住院患者血浆279份（包括129名冠心病、60名糖尿病、62名肺病疾患、28名单纯眼部疾患）,利用微粒子酶免分析法和动态定时散射比浊法分别检测上述血浆BNP浓度、cTnI浓度及hs CRP浓度;将以上数据进行统计学分析,比较冠心病组与非冠心病组的差异显著性.结果统计学分析证实：冠心病组与正常组在BNP水平、cTnI水平及hs CRP水平上均存在非常显著性差异（P＜0.01）,而其中又以BNP水平差异显著性最大（P＝0.001）;糖尿病组、肺病组以及眼科阴性对照组的BNP浓度结果与正常组比较则显示无统计学意义（P＞0.05）.结论血浆BNP浓度在冠心病患者中显著升高,进一步显示了其在心脏疾患中潜在的临床价值.

关键词：冠状动脉疾病血浆脑钠肽(BNP) 肌钙蛋白I(cTnI) 高敏感性C反应蛋白(hs CRP)

A shape-persistent plasticine-like conductive hydrogel with self-healing properties for peripheral nerve regeneration

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第11期142卷 134-143页

作者： Xinchang Kang Xiaojun Li can Liu Min Cai Pengfei Guan Yian Luo Youjun Guan Yu Tian Kunyu Ren Chengyun Ning lei Fan Guoxin Tan lei Zhou School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Department of Spine Surgery Guangzhou Key Laboratory of Spine Disease Prevention and Treatmentthe Third Affiliated HospitalGuangzhou Medical UniversityGuangzhou 510150China Department of Orthopedic Surgery Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China Department of Orthopedic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Hospital of Stomatology Guanghua School of StomatologyGuangdong Provincial Key Laboratory of StomatologySun Yat-sen UniversityGuangzhou 510055China Department of Pediatric Orthopedic Center for Orthopedic Surgerythe Third Affiliated Hospital of Southern Medical UniversityGuangzhou 510515China

In recent years,electrically conductive hydrogel-based nerve guidance conduits(NGCs)have yielded promising results for treating peripheral nerve injuries(PNIs).However,developed ones are generally pre-manufactured and exhibit a limited ability to achieve good contact with nerve tissue with irregu-lar ***,we developed a plasticine-like electrically conductive hydrogel consisting of gelatin,conducting polypyrrole,and tannic acid(named GPT)and assessed its ability to promote peripheral nerve *** shape-persistent GPT hydrogel exhibited good self-healing properties and could easily be molded to form a conduit that could match any injured nerve *** electrical properties could be tuned by changing the PPy *** vitro,the improved conductivity of the hydrogel pro-moted dorsal root ganglion(DRG)axonal *** importantly,we found that the GPT hydrogel enhanced axonal regeneration and remyelination in vivo,preventing denervation atrophy and enhancing functional recovery in a mice model of sciatic nerve *** results suggest that our plasticine-like NGC has huge prospects for clinical application in the repair of PNI.

关键词： Plasticine-like Conductive hydrogel Self-healing Moldability Peripheral nerve conduit

一起老人护理院诺如病毒急性胃肠炎暴发的调查

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

职业与健康 2012年第6期28卷 731-733页

作者：许峰宋灿磊李澜钟海明袁家春朱建明上海市金山区疾病预防控制中心 201599

目的调查分析1起某老人护理院诺如病毒急性胃肠炎暴发的原因,为今后老年人此类疾病的防控提供参考依据。方法采用个案调查收集病例资料,采集部分病例和工作人员肛拭子标本,运用实时荧光定量RT-PCR进行诺如病毒核酸检测。结果 21份肛拭... 详细信息

目的调查分析1起某老人护理院诺如病毒急性胃肠炎暴发的原因,为今后老年人此类疾病的防控提供参考依据。方法采用个案调查收集病例资料,采集部分病例和工作人员肛拭子标本,运用实时荧光定量RT-PCR进行诺如病毒核酸检测。结果 21份肛拭子样本中,19份诺如病毒GⅡ犁核酸阳性,其中11份阳性为发病老人肛拭子样本,8份为工作人员肛拭子样本。结论该疫情是一起由GⅡ型诺如病毒引起感染性腹泻暴发疫情,密切生活接触及未能及时消毒是疫情暴发的主要原因。

关键词：诺如病毒实时荧光定量RT-PCR 急性胃肠炎暴发

Activatable chemiluminescence probe based on four-arm PEGconjugated-pyropheophorbide-a for in vivo autofluorescence-free imaging of peroxynitrite

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Jianmei Ke lei Ding Ronggui Lian Cheng Zheng Wenjun Li Aixian Zheng Yupeng Sun Ming Wu Yongyi Zeng Xiaolong Liu Maochun Hong Xiaolong Zhang The United Innovation of Mengchao Hepatobiliary Technology Key Laboratory of Fujian Province Mengchao Hepatobiliary Hospital of Fujian Medical University Ganjiang Innovation Academy Chinese Academy of Sciences School of Rare Earths University of Science and Technology of China College of Chemistry Fuzhou University State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Peroxynitrite（ONOO-） is a highly reactive nitrogen species that plays pivotal roles in cell signal transduction and physiological or pathological progresses. However, commonly used ONOO-optical imaging probes are still hampered by high background/autofluorescence（fluorescence probe）, short emission wavelength, or poor selectivity in the case of chemiluminescence. Herein,we report a facile method to prepare an activatable chemiluminescence probe（PPA-PEG） with good biocompatibility and functionality for in vivo autofluorescence-free imaging of ONOO-. The PPA-PEG consists of pyropheophorbide-a（PPA）, a typical deep red photosensitizer that acts as both the recognition and signaling element, and 4-arm poly（ethylene glycol）(4-arm PEG), which improves the biosafety and water solubility of probe. These components can self-assemble into nanoparticles（namely PPA-PEG nanoprobe） in aqueous solution. The PPA-PEG nanoprobe showed an ultra-low chemiluminescence signal before interacting with ONOO-, but exhibited good selectivity, high sensitivity and a fast response toward ONOO-. The PPAPEG was successfully applied to image cellular ONOO-changes, as well as the endogenous ONOO-changes in inflammation models and subcutaneous or orthotopic hepatocellular carcinoma（HCC） tumors models in living mice. In vitro and in vivo studies verified the good detection and imaging capabilities of PPA-PEG for peroxynitrite, demonstrating suitable tissue penetration and a high signal-to-background ratio（SBR）. Thus, our nanoprobe can serve as a valuable activatable chemiluminescence imaging tool for studying important peroxynitrite-related chemical and biological applications.

关键词：

Application of near infrared spectroscopy in monitoring the moisture content in freeze-drying process of human coagulation factor VIII

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2015年第6期8卷 36-44页

作者： Fei Wang Wei Jiang can Li Hui Zhang lei Nie Lian Li Pei Wang Hengchang Zang School of Pharmaceutical Sciences and National Glycoengineering Research Center Shandong University Wenhuaxi Road 44Jinan 250012P.R.China Beijing Kaiyuan Shengshi Science and Technology Development Co. Ltd.Wenhuaxi Road 44Jinan 250012P.R.China School of Pharmacy Shenyang Pharmaceutical University Shenyang 110016P.R.China

As an important process analysis tool,near infrared spectroscopy(NIRS)has been widely used in process *** the present work,the feasibility of NIRS for monitoring the moisture content of human coagulation factor VIII(FVIII)in freeze-drying process was investigated.A partial least squares regression(PLS-R)model for moisture content determination was built with 88 *** pre-processing methods were explored,and the best method found was standard normal variate(SNV)transformation combined with 1st derivation with Savitzky–Golay(SG)15 point ***,four different variable selection methods,including uninformative variable elimination(UVE),interval partial least squares regression(iPLS),competitive adaptive reweighted sampling(CARS)and manual method,were compared for eliminating irrelevant variables,and iPLS was chosen as the best variable selection *** correlation coe±cient(R),correlation coe±cient of calibration set(Rcal),correlation coefficient of validation set(Rval),root mean square errors of cross-validation(RMSECV)and root mean square errors of prediction(RMSEP)of PLS model were 0.9284,0.9463,0.8890,0.4986% and 0.4514%,*** results showed that the model for moisture content determination has a wide range,good linearity,accuracy and *** developed approach was demonstrated to be a potential for monitoring the moisture content of FVIII in freeze-drying process.

关键词： Near infrared spectroscopy freeze-drying moisture content determination