检索结果-南通市图书馆

Miniscope3D:optimized single-shot miniature 3D fluorescence microscopy

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2020年第1期9卷 367-379页

作者： Kyrollos Yanny Nick Antipa William Liberti Sam Dehaeck Kristina Monakhova Fanglin Linda liu Konlin Shen Ren ng Laura Waller UCB/UCSF Joint Graduate Program in Bioengineering University of CaliforniaBerkeleyCA 94720USA Department of Electrical Engineering&Computer Sciences University of CaliforniaBerkeleyCA 94720USA TIPs Department Universite libre de Bruxelles(ULB)1050 BrusselsBelgium

Miniature fluorescence microscopes are a standard tool in systems ***,widefield miniature microscopes capture only 2D information,and modifications that enable 3D capabilities increase the size and weight and have poor resolution outside a narrow depth ***,we achieve the 3D capability by replacing the tube lens of a conventional 2D Miniscope with an optimized multifocal phase mask at the objective’s aperture *** the phase mask at the aperture stop significantly reduces the size of the device,and varying the focal lengths enables a uniform resolution across a wide depth *** phase mask encodes the 3D fluorescence intensity into a single 2D measurement,and the 3D volume is recovered by solving a sparsity-constrained inverse *** provide methods for designing and fabricating the phase mask and an efficient forward model that accounts for the fieldvarying aberrations in miniature *** demonstrate a prototype that is 17mm tall and weighs 2.5 grams,achieving 2.76μm lateral,and 15μm axial resolution across most of the 900×700×390μm^(3) volume at 40 volumes per *** performance is validated experimentally on resolution targets,dynamic biological samples,and mouse brain *** with existing miniature single-shot volume-capture implementations,our system is smaller and lighter and achieves a more than 2×better lateral and axial resolution throughout a 10×larger usable depth *** microscope design provides single-shot 3D imaging for applications where a compact platform matters,such as volumetric neural imaging in freely moving animals and 3D motion studies of dynamic samples in incubators and lab-on-a-chip devices.

关键词： enable resolution narrow

Structure regulation for ultra-high luminescence quantum yield lanthanide complex and simultaneous detection of cancer marker and ferrous ion

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 2021年第10期39卷 1194-1203,I0002页

作者： Min liu Zhifeng Li Jianhui Xiong Yefei Jiang Ting Tang Jinkai Qiu Junwei Yao Seik Weng ng Chenghui Zeng Research Center for Ultra Fine Powder Materials Key Laboratory of Functional Small Organic MoleculeMinistry of Education and Jiangxi's Key Laboratory of Green ChemistryCollege of Chemistry and Chemical EngineeringJiangxi Normal UniversityNanchang 330022China School of Chemical Engineering and Technology Tianshui Normal UniversityTianshui 741001China UCSI University CherasKuala LumpurMalaysia

The exploitation of a highly selective and sensitive probe to detect both cancer marker and metal ion is of great *** this work,the "one stone two bird" agent of 1,10-phenanthroline(phen) is designed to disrupt the polymeric lanthanide MOFs(LnMOFs,[Ln(CHO_(2))_(3)]n,Ln=Tb,la;Eu,1 b,CHO_(2)=formic acid) {[Ln(CHO_(2))_(4)·(C_(2) H_(8) N)]n,Ln=Y,2 a;Gd,2 b;Dy,2 c,C_(2)H_(8) N=dimethylamine}) into a soluble mononuclear species [Ln(phen)_(2)(NO_(3))_(3),Ln=Tb,3 a;Eu,3 b] as well as to provide an antenna for efficient photons absorption,resulting in an ultra-high luminescence quantum yield(QY,90%) europium *** luminescence QY is among the highest record of monomeric(zero-dimensional) lanthanide ***,mononuclear Tb3+complex(3 a) functions as a multiplex sensor towards both Fe^(2+)and cancer marker of 5-hydroxyindole-3-acetic acid(5-HIAA).Importantly,the limit of detection(LOD)for sensing 5-HIAA is an ultra-sensitive value of 1 × 10 s mol/L,which is even lower than that necessary for the early diagnosis of carcinoid *** interestingly,sensing results in simulated urine reveals that 3 a has potential application for early diagnosis in the clinic.

关键词： Ultra-high luminescence quantum yield Lanthanide complex Simultaneous detection Cancer marker Ferrous ion Rare earths

Candidate reference measurement procedure for serum 17-hydroxyprogesterone quantification via isotope dilution liquid chromatography–tandem mass spectrometry

在线全文

学校读者我要写书评

暂无评论

iLABMED 2024年第2期2卷 98-107页

作者： Ji Zhang Yang Jiang Ting liu Xiongwei liu Hui Huang Yanxiang Cheng Jieyan Li Bangning Cheng Chungen Qian Xufu Xiang Jun-Fa Xu Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics Department of Clinical ImmunologyInstitute of Laboratory MedicineSchool of Medical TechnologyGuangdong Medical UniversityDongguanGuangdongChina Shenzhen YHLO Biotech Co. Ltd.ShenzhenGuangdongChina Shenzhen Longgang Central Hospital Clinical Laboratory ShenzhenGuangdongChina The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics and Molecular Imaging Key Laboratory Systems Biology ThemeDepartment of Biomedical EngineeringCollege of Life Science and TechnologyHuazhong University of Science and TechnologyWuhanHubeiChina

Background:Accurate quantification of 17-hydroxyprogesterone(17-OHP)in serum is vital for clinical and research ***,inter-laboratory variability in test results exists owing to the lack of a standardized reference measurement procedure(RMP).Therefore,in this study,we developed a highly accurate,cost-effective,and user-friendly candidate RMP(cRMP)for analyzing 17-OHP in ***:We quantified 17-OHP in serum using a one-step liquid–liquid extraction method with the addition of 17-OHP-^(13)C_(3),followed by liquid chromatography–tandem mass *** ability of these methods to suppress interference was evaluated by chromatographic *** assessed accuracy,specificity,the lower limit of quantitation,linearity,and matrix effects by following the standards specified by the Clinical and Laboratory Standards *** consistency between the developed cRMP and the chemiluminescence method was evaluated through experiments with 120 clinical ***:The developed cRMP required only 8 min for accurate quantification of serum 17-OHP without bias from matrix effects or interference from 19 metabolites added as potential *** method exhibited favorable measurement performance,with a quantitation limit of 0.086 ng/mL,linear range of 0.1–400 ng/mL,a total imprecision of≤2.90%,spike recovery of 100.1%–100.6%,and relative deviations from assigned target values(RfB Institution)of−2.91%to 1.10%.The cRMP demonstrated good consistency with the conventional assay(chemiluminescence method),with a correlation coefficient R of ***:A cRMP with high accuracy,cost-effectiveness,and convenient operation was developed for quantifying 17-OHP in *** simplicity and robust performance make it an invaluable addition to the arsenal of analytical tools available for *** method can enhance the accuracy and reliability of 17-OHP measurements across various laboratories.

关键词： 17-hydroxyprogesterone isotope dilution liquid chromatography-tandem mass spectrometry reference measurement procedure serum

C包覆Ni磁性载体负载Pt催化硝基苯加氢性能

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

金属学报 2024年第8期60卷 1141-1149页

作者：武逸司阳黄彦民刁江勇孟繁敬刘增刘洪阳中国科学院金属研究所沈阳材料科学国家研究中心沈阳110016 沧州大化股份有限公司河北省改性异氰酸酯技术创新中心沧州061000

苯胺是一种重要的基础化工原料,在医药、染料、橡胶等领域被广泛应用。以硝基苯为原料通过液相催化加氢制备苯胺是目前主要工业生产方法之一,然而,如何从液相加氢反应体系中将催化剂高效分离和回收仍然是该领域的一个重要挑战。本工作... 详细信息

苯胺是一种重要的基础化工原料,在医药、染料、橡胶等领域被广泛应用。以硝基苯为原料通过液相催化加氢制备苯胺是目前主要工业生产方法之一,然而,如何从液相加氢反应体系中将催化剂高效分离和回收仍然是该领域的一个重要挑战。本工作开发了一种具有磁可分的C包覆Ni磁性载体负载Pt金属催化剂,用于高效催化硝基苯加氢制苯胺。以乙二胺四乙酸和Ni(OH)_(2)为原料成功合成了N掺杂石墨烯包覆Ni纳米颗粒磁性载体(Ni@ng),采用沉积-沉淀法制备Ni@ng负载Pt金属催化剂(Pt/Ni@ng),通过Raman光谱、TEM、XRD和XPS对制备的Pt/Ni@ng催化剂进行结构表征。结果表明,这种Ni@ng载体具有典型的核壳结构(纳米Ni颗粒为核,石墨烯为壳层)。XPS结果表明Ni@ng载体表面N掺杂石墨烯壳含有3.64%N (原子分数)。当Pt负载量(质量分数)从0.1%增加到0.5%时,Pt在石墨烯壳层表面的分散状态经历了单原子、团簇、颗粒的转变过程。当Pt负载量为0.3%时,以Pt团簇形式分散为主的Pt/Ni@ng催化硝基苯加氢显示出最高的活性,在反应压力为1 MPa和反应温度为30℃时,硝基苯加氢的周转频率为27239.2 h^(-1),硝基苯在60 min内完全转化为苯胺。此外,由于Pt/Ni@ng催化剂具有优异的液相磁可分性能,催化剂经5 cyc使用后加氢活性未明显降低。

关键词：核壳结构硝基苯加氢磁可分载体 N掺杂C材料

等离子双极前列腺剜除术与红激光前列腺剜除术在BPH患者日间手术中的疗效对比

在线全文

学校读者我要写书评

暂无评论

中华泌尿外科杂志 2024年第1期45卷 12-17页

作者：许鹏陈春晓刘存荣刘喆徐啊白陈玢屾刘春晓南方医科大学珠江医院泌尿外科广州510282

目的对比经尿道等离子双极前列腺剜除术与红激光前列腺剜除术在良性前列腺增生(BPH)患者日间手术中的有效性和安全性。方法回顾性分析2019年8月至2021年8月于南方医科大学珠江医院行日间手术的99例BPH患者的临床资料。其中47例采用等离... 详细信息

目的对比经尿道等离子双极前列腺剜除术与红激光前列腺剜除术在良性前列腺增生(BPH)患者日间手术中的有效性和安全性。方法回顾性分析2019年8月至2021年8月于南方医科大学珠江医院行日间手术的99例BPH患者的临床资料。其中47例采用等离子双极前列腺剜除术,为双极组;52例采用红激光前列腺剜除术,为红激光组。两组患者年龄[57.0(56.0,61.0)岁与59.0(57.0,62.0)岁]、前列腺体积[(60.0±8.2)ml与(57.4±9.4)ml]及术前总前列腺特异性抗原(tPSA)[(1.8±0.9)ng/ml与(2.2±0.9)ng/ml]、残余尿量(PVR)[20.0(0,40.0)ml与20.0(1.3,41.5)ml]、最大尿流率(Q_(max))[(9.4±2.6)ml/s与(9.6±1.9)ml/s]、国际前列腺症状评分(IPSS)[19.0(16.0,21.0)分与19.0(18.0,21.0)分]、生活质量评分(Q0L)[5.0(4.0,5.0)分与5.0(4.0,5.0)分]、国际勃起功能指数(IIEF-5)评分[(18.8±1.0)分与(19.2±0.9)分]差异无统计学意义(均P>0.05)。比较两组的手术时间,以及术后血红蛋白下降值、血钠下降值、膀胱冲洗时间、尿管留置时间。术后1个月门诊复查。比较两组术后1个月Q_(max)、IPSS、QOL、IIEF-5评分等指标。结果所有患者均顺利完成手术,无严重术中并发症发生。双极组手术时间低于红激光组[(57.3±4.2)min与(64.4±6.3)min,P0.05)。双极组和红激光组分别有8例和7例患者因术中发现前列腺炎性改变而留置尿管至术后48~60h,其余患者均在术后24 h内拔除尿管。双极组和红激光组术后1个月的Q_(max)分别为(20.4±1.8)、(21.1±1.7)ml/s,IPSS评分分别为7.0(7.0,8.0)7.0(7.0,8.0)分,Q0L评分分别为3.0(3.0,3.0)3.0(2.0,3.0)分,两组上述指标差异均无统计学意义(P>0.05)。结论等离子双极前列腺剜除术与红激光前列腺剜除术用于BPH患者的日间手术,术后短期Q_(max)、IPSS、血红蛋白降低值等指标无明显差异,二者有相同的疗效和安全性。

关键词：前列腺增生剜除术双极深激光日间手术疗效

血清β-半乳糖凝集素-3在非创伤股骨头坏死中的意义

在线全文

学校读者我要写书评

暂无评论

中国矫形外科杂志 2024年第7期32卷 602-607页

作者：陈敏刘珊王荣刘歆青岛市胸科医院检验科山东青岛266043 青岛大学附属青岛市中心医院青岛肿瘤医院检验科山东青岛266042 临沂市人民医院股骨头科山东临沂276000

[目的]本研究旨在探讨血清β-半乳糖凝集素-3(lectin galactoside-binding soluble 3,LGALS3)水平在非创伤性股骨头坏死(non-traumatic osteonecrosis of the femoral head,NONFH)诊断中的临床价值。[方法]2023年4月—2023年9月纳入NONFH患者84例为坏死组,选取同期检者健康人78例为对照组。采用酶联免疫吸附法检测两组血清中LGALS3的水平,并收集相关临床资料,包括性别、年龄、体重指数(body mass index,BMI)、吸烟史、NONFH病因、受累侧数、疼痛视觉模拟评分(visual analogue scale,VAS)、Harris评分、坏死程度及ARCO分期。对两组LGALS3浓度及其与各临床参数的关系进行比较分析。[结果]坏死组血清中LGALS3浓度显著高于正常人组[(9.8±7.7)ng/ml vs(4.2±4.1)ng/ml,Png/ml vs(5.3±3.3)ng/ml,Png/ml vs(3.1±1.2)ng/ml,Png/ml vs(4.1±1.3)ng/ml vs(11.0±5.8)ng/ml vs(16.8±8.2)ng/ml,P<0.001]。NONFH患者的LGALS3浓度与VAS评分呈显著正相关(r=0.843,P<0.001),与Harris评分呈显著负相关(r=-0.710,P<0.001),与ARCO分期呈显著正相关(r=0.822,P<0.001)。ROC分析表明,LGALS3浓度预测是否NONFH的曲线下面积(area under curve,AUC)为0.769。[结论]血清中的LGALS3水平可反映NONFH病情的严重程度,并可能作为该病早期诊断的潜在生物标志物。

关键词：非创伤性股骨头坏死 β-半乳糖凝集素-3 酶联免疫吸附法

Anti-epileptic and Neuroprotective Effects of Ultra-low Dose NADPH Oxidase Inhibitor Dextromethorphan on Kainic Acid-induced Chronic Temporal Lobe Epilepsy in Rats

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2024年第5期40卷 577-593页

作者： Jing-Jing Yang Ying-Xin liu Yan-Fang Wang Bi-Ying Ge Ying Wang Qing-Shan Wang Sheng Li Jian-Jie Zhang Ling-Ling Jin Jau-Shyong Hong Sheng-Ming Yin Jie Zhao College of Basic Medical Sciences Dalian Medical UniversityDalian116044China Department of Neurology The First Affiliated Hospital of Dalian Medical UniversityDalian116011China National and Local Joint Engineering Research Center for Drug Research and Development of Neurodegenerative Diseases Dalian116044China School of Public Health Dalian Medical UniversityDalian116044China Neurobiology Laboratory National Institute of Environmental Health SciencesNational Institutes of HealthResearch Triangle ParkDurhamNC27709USA

Neuroinflammation mediated by microglia and oxidative stress play pivotal roles in the development of chronic temporal lobe epilepsy(TLE).We postulated that kainic acid(KA)-Induced status epilepticus triggers microglia-dependent inflammation,leading to neuronal damage,a lowered seizure threshold,and the emergence of spontaneous recurrent seizures(SRS).Extensive evidence from our laboratory suggests that dextromethorphan(DM),even in ultra-low doses,has anti-inflammatory and neuroprotective effects in many animal models of neurodegenerative *** results showed that administration of DM(10 ng/kg per day;subcutaneously via osmotic minipump for 4 weeks)significantly mitigated the residual effects of KA,including the frequency of SRS and seizure *** addition,DM-treated rats showed improved cognitive function and reduced hippocampal neuronal *** found suppressed microglial activation-mediated neuroinflammation and decreased expression of hippocampal gp91^(phox) and p47^(phox) proteins in KA-induced chronic TLE ***,even after discontinuation of DM treatment,ultra-low doses of DM continued to confer long-term anti-seizure and neuroprotective effects,which were attributed to the inhibition of microglial NADPH oxidase 2 as revealed by mechanistic studies.

关键词： Temporal lobe epilepsy Dextromethorphan NADPH oxidase Ultra-low dose

用于检测痕量铅离子的功能化反射结构光纤干涉传感器

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

物理化学学报 2024年第4期40卷 167-175页

作者：赵可刘震刘露遥余长源潘竞顺黄旭光华南师范大学广东省纳米光子功能材料与器件重点实验室广州510006 香港理工大学电子与信息工程系中国香港999077

铅离子(Pb^(2+))是日常生活中常接触的有毒重金属污染物之一。本研究开发了一种新型反射式光纤干涉传感器,用于检测痕量铅离子。该传感器结构由单模光纤、无芯光纤和细芯光纤(TCF)依次拼接而成。TCF的包层被氢氟酸部分腐蚀并涂覆功能化... 详细信息

铅离子(Pb^(2+))是日常生活中常接触的有毒重金属污染物之一。本研究开发了一种新型反射式光纤干涉传感器,用于检测痕量铅离子。该传感器结构由单模光纤、无芯光纤和细芯光纤(TCF)依次拼接而成。TCF的包层被氢氟酸部分腐蚀并涂覆功能化的水凝胶传感膜。该传感膜选用甲基丙烯酸2-羟基乙酯(2-HEMA)作为识别单体。2-HEMA中的氧原子能与Pb^(2+)发生配体-受体相互作用,形成“-O-Pb-O-”交联结构,从而改变TCF的新包层有效折射率。因此,可以通过观察反射光谱中光信号的变化来检测水溶液中Pb^(2+)的浓度。所提出的传感器具有很高的检测灵敏度(1.926×10^(9)nm·mol^(-1)·L),其检测极限为4.14 ppt(1 ng·L^(-1)=1 ppt),比世界卫生组织(WHO)规定的饮用水中Pb^(2+)(10 ppb,1μg·L^(-1)=1 ppb)浓度低1000倍。此外,利用一个方程组实现了该传感器的温度自校准功能,成功地消除了环境温度的干扰。由于该传感器良好的特异性、稳定性以及反射式结构,非常便于实时远程检测,为环境和人类健康监测提供了广阔的前景。

关键词：铅离子浓度光学传感反射式干涉结构光纤传感器温度干扰

Artificial cilia for soft and stable surface covalent immobilization of bone morphogenetic protein-2

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bioactive Materials 2023年第6期24卷 551-562页

作者： Qi Gan Lina Chen Ho-Pan Bei Sze-Wing ng Han Guo Guoqiang liu Hao Pan Changsheng liu Xin Zhao Zijian Zheng Laboratory for Advanced Interfacial Materials and Devices School of Fashion and TextilesThe Hong Kong Polytechnic UniversityKowloon99077Hong Kong Special Administrative Region of China Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237PR China Department of Biomedical Engineering The Hong Kong Polytechnic UniversityHung HomHong Kong Special Administrative Region of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204PR China Department of Applied Biology and Chemical Technology Faculty of ScienceThe Hong Kong Polytechnic UniversityKowloon99077Hong Kong Special Administrative Region of China

Preservation of growth factor sensitivity and bioactivity(e.g.,bone morphogenetic protein-2(BMP-2))post-immobilization to tissue engineering scaffolds remains a great ***,we develop a stable and soft surface modification strategy to address this ***-2(a model growth factor)is covalently immobilized onto homogeneous poly(glycidyl methacrylate)(PGMA)polymer brushes which are grafted onto substrate surfaces(Au,quartz glass,silica wafer,or common biomaterials)via surface-initiated atom transfer radical *** surface modification method multiplies the functionalized interfacial area;it is simple,fast,gentle,and has little effect on the loaded protein owing to the cilia *** immobilized BMP-2(i-BMP-2)on the surface of homogeneous PGMA polymer brushes exhibits excellent bioactivity(-87%bioactivity of free BMP-2 in vitro and 20%-50%higher than scaffolds with free BMP-2 in vivo),with conformation and secondary structure well-preserved after covalent immobilization and ethanol ***,the osteogenic activity of i-BMP-2 on the nanoline pattern(PGMA-poly(N-isopropylacrylamide))shows-110%bioactivity of free *** is superior compared to conventional protein covalent immobilization strategies in terms of both bioactivity preservation and therapeutic *** polymer brushes can be used to modify surfaces of different tissue-engineered scaffolds,which facilitates in situ immobilization of growth factors,and accelerates repair of a wide range of tissue types.

关键词： Polymer brush Poly(glycidyl methacrylate) Surface modification Protein immobilization Bioactivity