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Rapid CO_(2)-laser scribing fabrication of an electrochemical sensor for the direct detection of Pb^(2+) and Cd^(2+)

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Nano Research 2023年第5期16卷 7671-7681页

作者： Guanglei chu Yanyan Zhang Zhongrui Zhou Weixuan Zeng Dongfei Chen Siping yu Jiemin Wang Yemin Guo Xia Sun ming Li Hunan Agricultural Equipment Research Institute Hunan Academy of Agricultural SciencesChangsha 410125China School of Agriculture Engineering and Food Science Shandong University of TechnologyZibo 255049China School of Chemistry University of New South WalesSydneyNSW 2052Australia Hunan Rice Research Institute Hunan Academy of Agricultural SciencesChangsha 410125China Longping Branch College of BiologyHunan UniversityChangsha 410125China Department of Materials Science and Engineering National University of SingaporeNo.21 Lower Kent Ridge RoadSingapore 119077Singapore

Laser-induced graphene(LIG)is a highly promising preparation material for electrochemical sensors;however,its preparation speed and nanomaterial modification steps significantly limit its mass ***,this study proposed a new laser printing strategy that considerably improved the preparation speed of LIG with excellent electrochemical *** the optimal parameters(laser power of 1%,scribing spacing of 0.12 mm,scribing speed of 100 mm·s^(−1)),it took only 14.2 s to complete the preparation of the detection ***,we successfully detected Cd^(2+)and Pb^(2+)without any toxic reagents or electrode modification *** limits of detection of the sensor were 0.914 and 0.916μg·L^(−1)for Cd^(2+)and Pb^(2+),respectively,which are significantly lower than the required values for drinking-water quality,according to the World Health Organization *** study provides a novel approach for the rapid detection of heavy-metal ions.

关键词： laser-induced graphene electrochemical sensor rapid fabrication heavy-metal ions

Membranes for the life sciences and their future roles in medicine

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Chinese Journal of Chemical Engineering 2022年第9期35卷 1-20页

作者： Xiaoyue Yao yu Liu Zhenyu chu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Since the global outbreak of COVID-19,membrane technology for clinical treatments,including extracorporeal membrane oxygenation(ECMO)and protective masks and clothing,has attracted intense research attention for its irreplaceable *** research and applications are now playing an increasingly important role in various fields of life *** addition to intrinsic properties such as size sieving,dissolution and diffusion,membranes are often endowed with additional functions as cell scaffolds,catalysts or sensors to satisfy the specific requirements of different clinical *** this review,we will introduce and discuss state-of-the-art membranes and their respective functions in four typical areas of life science:artificial organs,tissue engineering,in vitro blood diagnosis and medical *** will be given to the description of certain specific functions required of membranes in each field to provide guidance for the selection and fabrication of the membrane *** advantages and disadvantages of these membranes have been compared to indicate further development directions for different clinical ***,we propose challenges and outlooks for future development.

关键词： Membrane Life science Artificial organ Tissue engineering In vitro blood diagnosis Medical support

Anti-fibrotic effect of rosmarinic acid on inhibition of pterygium epithelial cells

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International Journal of Ophthalmology(English edition) 2018年第2期11卷 189-195页

作者： Ya-yu Chen Chia-Fang Tsai ming-chu Tsai Wen-Kang Chen yu-Wen Hsu Fung-Jou Lu Institute of Medicine College of MedicineChung Shan Medical UniversityTaichung City 40201TaiwanChina Department of Biotechnology TransWorld UniversityDouliu City 64063TaiwanChina Department of Applied Cosmetology Tainan Junior College of NursingTainan City 70043TaiwanChina Department of Optometry Da-Yeh UniversityChanghua 51591TaiwanChina Department of Ophthalmology Chung Shan Medical University HospitalTaichung City 40201TaiwanChina

AIM： To investigate the anti-fibrosis effect of rosmarinic acid（RA） in pterygium epithelial cells（PECs） to determine if RA is a potent agent for treating ***： The PECs（1×10-4 cells/mL） were treated with 100 μmol/L of RA for 1, 3 and 6h. After RA treatment, the cell viability was determined by staining with acridine orange/DAPI and analysis via a NucleoC ounter NC-3000. The protein expression levels of type I collagen, transforming growth factor beta-1（TGF-β1）, TGF-β type Ⅱ receptor（TGF-βRⅡ）, p-Smad1/5, p-Smad2, p-Smad3, and Smad4 of the cell lysates were measured by Western blot ***： The cell viability of PECs was significantly decreased after RA treatment（P〈0.01）. As the result, RA reduced the protein expression of typeⅠcollagen and TGF-β1 of PECs. Additionally, RA also inhibited TGF-β1/Smad signaling by decreasing the protein expressions of TGF-βRII, p-Smad1/5, p-Smad2, p-Smad3, and ***： This study demonstrate that RA could inhibit fibrosis of PECs by down-regulating type I collagen expression and TGF-β1/Smad signaling. Therefore, RA is a potent therapeutic agent for the treatment of pterygium.

关键词： fibrosis pterygium rosmarinic acid transforming growth factor beta-1 typeⅠcollagen

Artificial transpiration: an efficient means of waste-water treatment

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National Science Review 2018年第2期5卷 120-121页

作者： ming Zhou Zongfu yu Department of Electrical and Computer Engineering University of Wisconsin—Madison

Efficient solar vapor generation has been attracting a lot of attention for its potential in various applications,such as desalination,sterilization and chemical purification with a minimal carbon *** progress has been achieved with materials designs for photon[1–3]and thermal management[4–6].However,with those improvements,losses re-

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Cu^(2+)污染下农作物叶片特征光谱探究

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光谱学与光谱分析 2025年第1期45卷 264-271页

作者：张超吴轩杨可明齐钒宇夏天中国地质调查局发展研究中心北京100037 中国地质大学(北京)地球科学与资源学院北京100083 全国地质资料馆北京100037 中国矿业大学(北京)地球科学与测绘工程学院北京100083 中国资源卫星应用中心北京100094

为探究重金属胁迫下农作物污染响应的敏感叶型及谱段,设计了室外温室环境下的不同铜胁迫梯度玉米花盆试验。以玉米叶片为探究对象,利用仪器测定了出穂期玉米叶片的高光谱反射率数据以及叶片中重金属含量数据,为研究提供了基础数据。从... 详细信息

为探究重金属胁迫下农作物污染响应的敏感叶型及谱段,设计了室外温室环境下的不同铜胁迫梯度玉米花盆试验。以玉米叶片为探究对象,利用仪器测定了出穂期玉米叶片的高光谱反射率数据以及叶片中重金属含量数据,为研究提供了基础数据。从频率域角度,结合时频分析的方法设计了叶片光谱探测法(LSDM),获得了重金属铜胁迫下敏感叶型及谱段,为农作物重金属监测提供技术支撑。根据玉米的生长过程,从老叶(O)、中叶(M)、新叶(N)光谱350~1300 nm的全谱段和子谱段角度进行探究。(1)对铜胁迫下玉米叶片的高光谱反射率数据进行双微分(SOD)和包络线移除(CR),转换到频率域上,结合时频分析的方法进行Daubechies小波6层分解。(2)根据信号异常点、小波高值点和SODCR曲线高值点,定义玉米叶片的光谱异常参数(SAP)。异常变化反射率ACR(异常反射率与其后一个相邻波段反射率差值的绝对值);异常小波系数AWC(异常小波系数与其后一个相邻波段小波系数差值的绝对值);异常SODCR值ASV(异常点SODCR值与其后一个相邻波段SODCR值差值的绝对值)。通过光谱异常参数与玉米叶片重金属含量的相关关系,探究对铜污染响应敏感的叶型及谱段。结果表明,叶片光谱探测法LSDM能高效地对玉米叶片弱信息进行增强,并准确定位出重金属铜胁迫引起的光谱异常谱段位置,异常变化范围集中在350~800 nm内;光谱异常参数能定量地衡量玉米叶片在重金属铜胁迫下的光谱异常;在不同铜胁迫梯度下,玉米新叶(N)为敏感叶型,敏感谱段为蓝边、绿峰、黄边、红谷。该研究有望为其他谷类农作物及其冠层尺度重金属监测提供技术支撑。

关键词：重金属胁迫玉米叶片高光谱敏感叶型敏感谱段

Optimal incision sites to reduce corneal aberration variations after small incision phacoemulsification cataract surgery

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International Journal of Ophthalmology(English edition) 2016年第4期9卷 540-545页

作者： Ling chu Jiang-yue Zhao Jin-Song Zhang Jie Meng ming-Wu Wang Ya-Jing Yang Jia-ming yu AIER Eye Hospital of Shenyang Shenyang 110005Liaoning ProvinceChina Eye Hospital of China Medical University Department ofOphthalmology the 4th Affiliated Hospital of China MedicalUniversity Provincial Key Laboratory of Lens Research Shenyang 110005Liaoning ProvinceChina Department of Ophthalmology and Vision Science the University of Arizona College of MedicineTucsonAZ85711-1824USA

AIM： To analyze the effect of steep meridian small incision phacoemulsification cataract surgery on anterior,posterior and total corneal wavefront aberration.· METHODS： Steep meridian small incision phacoemulsification cataract surgery was performed in age-related cataract patients which were divided into three groups according to the incision site： 12 o＇clock, 9o＇clock and between 9 and 12 o＇clock（BENT） incision groups. The preoperative and 3-month postoperative root mean square（RMS） values of anterior, posterior and total corneal wavefront aberration including coma,spherical aberration, and total higher-order aberrations（HOAs）, were measured by Pentacam scheimpflug imaging. The mean preoperative and postoperative corneal wavefront aberrations were documented.·RESULTS： Total corneal aberration and total lower-order aberrations decreased significantly in three groups after operation. RMS value of total HOAs decreased significantly postoperatively in the 12 o＇clock incision group（P 〈0.001）. Corneal spherical aberration was statistically significantly lower after steep meridian small incision phacoemulsification cataract surgery in BENT incision group（P 〈0.05） and Pearson correlation analysisindicated that spherical aberration changes had no significant relationship with total astigmatism changes in all three corneal incision location.·CONCLUSION： Corneal incision of phacoemulsification cataract surgery can affect corneal wavefront *** 12 o＇clock corneal incision eliminated more HOAs and the spherical aberrations decreased in BENT incision group obviously when we selected steep meridian small incision. Cataract lens replacement using wavefront-corrected intraocular lens combined with optimized corneal incision site would improve ocular aberration results.

关键词： cataract surgery corneal aberration corneal incision

Three-Dimensional Hierarchical Nanostructured Cu/Ni–Co Coating Electrode for Hydrogen Evolution Reaction in Alkaline Media

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Nano-Micro Letters 2015年第4期7卷 347-352页

作者： Ning Wang Tao Hang Dewei chu ming Li State Key Laboratory of Metal Matrix Composites School of Material Science and Engineering Key Laboratory for Thin Film and Microfabrication of Ministry of EducationShanghai Jiao Tong University School of Materials Science & Engineering University of New South Wales

In this work,three-dimensional hierarchical nickel–cobalt alloy coating for hydrogen evolution cathode was fabricated by electrodeposition *** coatings’morphology evolves from sea cucumber-like nanostructure to caterpillar-like one with the increase of cobalt content.A large amount of nanometric‘‘steps,’’served as the active sites for hydrogen evolution reaction,were *** to Tafel polarization measurements,the exchange current density of the as-synthesized coating with hierarchical nanostructure was 21.9 times compared with that of flat nickel *** addition,the hierarchical coating also displayed good electrochemical stability from the galvanostatic test.

关键词： Electrodeposition Ni–Co alloy Hierarchical Hydrogen evolution reaction

Basic mechanisms of peripheral nerve injury and treatment via electrical stimulation

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Neural Regeneration Research 2022年第10期17卷 2185-2193页

作者： Xiao-Lei chu Xi-Zi Song Qi Li yu-Ru Li Feng He Xiao-Song Gu Dong ming Academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjinChina Department of Rehabilitation Tianjin HospitalTianjinChina College of Exercise&Health Sciences Tianjin University of SportTianjinChina College of Precision Instruments&Optoelectronics Engineering Tianjin UniversityTianjinChina

Previous studies on the mechanisms of peripheral nerve injury(PNI)have mainly focused on the pathophysiological changes within a single injury ***,recent studies have indicated that within the central nervous system,PNI can lead to changes in both injury sites and target organs at the cellular and molecular ***,the basic mechanisms of PNI have not been comprehensively *** electrical stimulation was found to promote axonal regeneration and functional rehabilitation after PNI,as well as to alleviate neuropathic pain,the specific mechanisms of successful PNI treatment are *** summarize and discuss the basic mechanisms of PNI and of treatment via electrical *** PNI,activity in the central nervous system(spinal cord)is altered,which can limit regeneration of the damaged *** example,cell apoptosis and synaptic stripping in the anterior horn of the spinal cord can reduce the speed of nerve *** pathological changes in the posterior horn of the spinal cord can modulate sensory abnormalities after *** can be observed in cases of ectopic discharge of the dorsal root ganglion leading to increased pain signal *** injured site of the peripheral nerve is also an important factor affecting post-PNI *** PNI,the proximal end of the injured site sends out axial buds to innervate both the skin and muscle at the injury site.A slow speed of axon regeneration leads to low nerve ***,it can take a long time for the proximal nerve to reinnervate the skin and muscle at the injured *** the perspective of target organs,long-term denervation can cause atrophy of the corresponding skeletal muscle,which leads to abnormal sensory perception and hyperalgesia,and finally,the loss of target organ *** mechanisms underlying the use of electrical stimulation to treat PNI include the inhibition of synaptic stripping,addressing the excessive excitability of the dorsal r

关键词： axonal transport brain-derived neurotrophic factor dorsal horn stimulation dorsal root ganglion stimulation electrical stimulation nerve regeneration neuropathic pain peripheral nerve injury spinal cord dorsal stimulation

ON IMPROVING AN INTEGRATED INVENTORY MODEL FOR A SINGLE VENDOR AND MULTIPLE BUYERS WITH A RELAXED MATERIAL ORDERING CYCLE POLICY

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Journal of Systems Science and Systems Engineering 2006年第3期15卷 298-313页

作者： yugang yu Feng chu Haoxun CHEN FRE CNRS 2732 ISTIT-OSI University of Technology of Troyes 10010 Troyes France

In this paper, we propose a new model for improving the lot size obtained with the model of Woo, Hsu, and Wu （2001） proposed in their paper ＂An integrated inventory model for a single vendor and multiple buyers with ordering cost reduction＂（Int. J. Production Economics 73 203-215）. The new model can provide a lower or equal joint total cost as compared to Woo, Hsu, and Wu＇s model due to the relaxation of their integral multiple material ordering cycle policy to a fractional-integral multiple material ordering cycle policy. The proposed model is analyzed and an algorithm for calculating the optimal lot size of the model is developed. A numerical study based on the example used by Woo, Hsu, and Wu is presented.

关键词： Inventory integrated model raw materials single vendor multiple buyers