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食叶昆虫药效生测的叶面供药方法

植物医学 1988年第4期 57-58+56页

作者： J.l.wolfson l.l.Murdock 张鸣明

杀虫剂溶解于明胶溶液中后,可均匀、牢固地涂布和附着在大多数植物叶片表面。作者利用这一特点设计了一种叶面供药方法及其标定技术。

关键词：食叶昆虫生物测定明胶

Surface engineering and the application of laser-based processes to stents-A review of the latest development

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Bioactive Materials 2022年第4期7卷 159-184页

作者： J.Dong M.Pacella Y.liu l.Zhao wolfson School of Mechanical Electrical and Manufacturing EngineeringLoughborough UniversityLoughboroughLeicestershireLE113TUUK Centre for Biological Engineering Loughborough UniversityLoughboroughLeicestershireLE113TUUK

late in-stent thrombus and restenosis still represent two major challenges in stents’*** treatment of stent is attracting attention due to the increasing importance of stenting intervention for coronary artery *** surface engineering techniques have been utilised to improve the biological response in vivo on a wide range of biomedical *** a tailorable,precise,and ultra-fast process,laser surface engineering offers the potential to treat stent materials and fabricate various 3D textures,including grooves,pillars,nanowires,porous and freeform structures,while also modifying surface chemistry through nitridation,oxidation and ***-based processes can reduce the biodegradable materials’degradation rate,offering many advantages to improve stents’performance,such as increased endothelialisation rate,prohibition of SMC proliferation,reduced platelet adhesion and controlled corrosion and ***,adequate research has been conducted on laser surface texturing and surface chemistry *** texturing on commercial stents has been also investigated and a promotion of performance of laser-textured stents has been *** this critical review,the influence of surface texture and surface chemistry on stents performance is firstly reviewed to understand the surface characteristics of stents required to facilitate cellular *** is followed by the explicit illustration of laser surface engineering of stents and/or related *** induced periodic surface structure(lIPSS)on stent materials is then explored,and finally the application of laser surface modification techniques on latest generation of stent devices is highlighted to provide future trends and research direction on laser surface engineering of stents.

关键词： Surface engineering laser surface engineering Stent Cell response laser textured stents

Fragmentation of fuel pellets during transport via a belt conveyor:A design of experiment study

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Particuology 2022年第7期20卷 29-37页

作者： Hamid Gilvari Coen H.H.van Battum Richard Farnish Yusong Pang Wiebren de Jong Dingena l.Schott Section of Transport Engineering and logistics Department of Maritime&Transport TechnologyFaculty of MechanicalMaritime and Materials EngineeringDelft University of TechnologyThe Netherlands wolfson Centre for Bulk Solids Handling Technology Faculty of Engineering&ScienceUniversity of GreenwichUnited Kingdom Section of large Scale Energy Storage(lSE) Department of Process&EnergyFaculty of MechanicalMaritime and Materials EngineeringDelft University of TechnologyThe Netherlands

This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel *** this,a belt conveyor with a length of 3.1 m was used and operated at varying conditions:speeds,percentages of material loading on the belt,two combinations of the inclination angle of the belt and the falling height,and a different number of handling *** considered a design of experiments approach based on response surface methodology to investigate the effect of different conditions on the potential of fines ***,a comparison between the results of the belt conveyor and three common benchmark experimental approaches(tumbling box,rotary impact tester,and mechanical compression test)was *** show that the number of handling steps and the combined effect of drop height and inclination angle directly affected the fines ***,the tested belt speed range and the level of loading were of lower significance.A polynomial quadratic model was derived based on the regression analysis and showed a high accuracy to predict the proportion of ***,the tumbling box method showed good potential to predict the proportion of fines in a belt conveyor when transported several times.

关键词： Fuel pellets Breakage Belt conveyor Transport Design of experiment Box–Behnken design

高效液相色谱电化学检测法分离测定狒狒血浆中的儿茶酚胺

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北京大学学报(医学版) 1988年第5期 354-356页

作者：夏桂珠,l. T. Chan,S. K. wolfson 北京医科大学药学院美国匹兹堡大学医学院美国匹兹堡大学医学院

HPlC-ED法测定血浆中的儿茶酚胺类是一种灵敏、专属的方法。我们发现用EDTA抗凝后的全血样品在3℃存放5小时,与立即离心分离所得血浆中测得的儿茶酚胺类的浓度无显著差别。若在血浆中加入谷胱甘肽作抗氧剂并冷却至—13℃,样品可稳定保... 详细信息

HPlC-ED法测定血浆中的儿茶酚胺类是一种灵敏、专属的方法。我们发现用EDTA抗凝后的全血样品在3℃存放5小时,与立即离心分离所得血浆中测得的儿茶酚胺类的浓度无显著差别。若在血浆中加入谷胱甘肽作抗氧剂并冷却至—13℃,样品可稳定保存两天。当用高氯酸溶液由三氧化二铝上解吸儿茶酚胺时,时间应控制在1～2分钟之内,否则所得结果不准确。

关键词：肾上腺素去甲肾上腺素多巴胺血浆高效液相色谱电化学检测稳定性儿茶酚胺类

Development of 3D Scanning System for Robotic Plasma Processing of Medical Products with Complex Geometries

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Journal of Electronic Science and Technology 2020年第3期18卷 212-222页

作者： Darya l.Alontseva Elaheh Ghassemieh Alexander l.Krasavin Albina T.Kadyroldina School of Information Technology and Intelligent Systems D.Serikbayev East Kazakhstan State Technical UniversityUst-Kamenogorsk 070004 wolfson School of Mechanical Electrical and Manufacturing EngineeringLoughborough UniversityLoughborough LE113TU

This paper describes the development of an intelligent automated control system of a robot manipulator for plasma treatment of medical implants with complex *** two-layer coatings from the Ti wire and hydroxyapatite powders are applied on the surface of Ti medical implants by microplasma spraying to increase the biocompatibility of *** coating process requires precise control of a number of parameters,particularly the plasma spray distance and plasma jet traverse ***,the development of the robotic plasma surface treatment involves automated path *** key idea of the proposed intelligent automatic control system is the use of data of preliminary three-dimensional (3D) scanning of the processed implant by the robot *** segmentation algorithm of the point cloud from laser scanning of the surface is *** methodology is suitable for robotic 3D scanning systems with both non-contact laser distance sensors and video cameras,used in additive manufacturing and medicine.

关键词： Plasma processing point cloud robot manipulator surface segmentation three-dimensional(3D)scanning

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金属对金属全髋关节置换术:症状与MR影像学表现相关吗?

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国际医学放射学杂志 2013年第1期 76-77页

作者： E.Y.Chang J.l.McAnally J.R.Van Horne S.Statum T.wolfson A.Gamst 黄黎香 Department of Radiology Veterans Affairs San Diego Healthcare System3350 La Jolla Village DrMC114San DiegoCA 92161

目的确定金属对金属全髋关节置换术后MR表现异常的发生率,明确症状与MRI表现的相关性。材料与方法本研究符合HIPAA原则,获得单位伦理委员会批准,无需知情同意书。共192个髋关节(174例病人)在1.5TMR设备采用常规序列进行15个月的随访评... 详细信息

目的确定金属对金属全髋关节置换术后MR表现异常的发生率,明确症状与MRI表现的相关性。材料与方法本研究符合HIPAA原则,获得单位伦理委员会批准,无需知情同意书。共192个髋关节(174例病人)在1.5TMR设备采用常规序列进行15个月的随访评价。两位观察者对影像进行回顾性分析,包括:假肿瘤的有无和大小、是否与假关节囊相通、囊壁厚度、滑膜增生、分隔、实性成分、囊壁磁敏感伪影灶、骨质溶解、骨髓水肿、外展肌或肌腱异常以及Anderson分级(正常、感染或不同程度的金属对金属疾病)。采用Fisher精确检验或Wilcoxon-Mann-Whitney检验的统计学方法比较上述表现在无症状和有症状病人之间的相关性。结果对于每例病人的每个髋关节,假肿瘤的发病率为69%(120/174例,132/192个关节)。骨髓水肿(6例无症状病人和19例有疼痛病人,P<0.01)和肌腱撕裂(5例无症状病人和13例有疼痛病人,P<0.05)是疼痛的相关因素。是否出现症状与假肿瘤的有无(P=0.4151)和大小无关。当Anderson分级分为正常和异常时,观察者间具有中度一致性(κ=0.439),但也与症状没有相关性(P=0.6648)。结论骨髓水肿和外展肌的肌腱撕裂与病人的疼痛有关,而假肿瘤的有无和大小与疼痛无关。

关键词：金属对金属髋关节肌腱骨髓水肿外展肌 MR

Preparation of MCM-41 in Industrial Scale and Its Application in Heavy Oil Processing

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Chemical Research in Chinese Universities 2002年第2期18卷 169-174页

作者： Jianwen Da Tiancun Xiao Jianming Su Xingzhong Xu Malcolm l.H.Green Research Institute of Qilu Petrochem.Corp. Zibo 255400China The wolfson Catalysis Centre Inorganic Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxfordOX13QRUK

A series of MCM 41 molecular sieves have been prepared on an industrial scale, and the effect of preparation factors such as aging temperature, pH values on the structure and pore distribution of the MCM 41 product have been studied by using X ray diffraction(XRD), thermogravimetric(TG) and electron microscopy(TEM). It is shown that the pH values have a significant effect on the crystallinity of the synthesized product. Under proper conditions, the MCM 41 prepared on an industrial scale has the same performance as the samples prepared on an lab scale. The prepared MCM 41 was used as a modifier of zeolite Y for fluid catalytic cracking(FCC) of residual oil. It is shown that the addition of the MCM 41 in the zeolite Y catalyst increases the pore size, and surface area of the catalysts, which helps to increase the yield of gasoline and diesel and decrease the production of gaseous product and carbon deposition in the catalyst. The better performance of the MCM 41 modified zeolite Y catalyst is believed to be due to its adjustment on the acidity and increase of the pore size.

关键词： MCM-41 Industrial scale synthesis FCC catalyst

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Combined immunohistochemical and retrograde tracing reveals little evidence of innervation of the rat dentate gyrus by midbrain dopamine neurons

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Frontiers in Biology 2016年第3期11卷 246-255页

作者： Charlotte M. Ermine Jordan l. Wright Clare l. Parish Davor Stanic lachlan H. Thompson The Florey Institute for Neuroscience and Mental Health The University of Melbourne Parkville Victoria 3010 Australia Current address wolfson Institute for Biomedical Research University College London Gower Street London WC1E 6BT UK

Although the functional neuroanatomy of the midbrain dopamine （mDA） system has been well characterized, the literature regarding its capacity to innervate the hippocampal formation has been inconsistent. The lack of expression of definitive markers for dopaminergic fibers, such as the dopamine transporter, in the hippocampus has complicated studies in this area. Here we have used immunohistochemical techniques to characterize the tyrosine hydroxylase expressing fiber network in the rat hippocampus, combined with retrograde tracing from the dentate gyrus to assess the capacity for afferent innervation by mDA neurons. The results indicate that virtually all tyrosine hydroxylase fibers throughout the hippocampus are of a noradrenergic phenotype, while the overlying cortex contains both dopaminergic and noradrenergic fiber networks. Furthermore, retrograde tracing from the dentate gyrus robustly labels tyrosine hydroxylase-immunoreactive noradrenergic neurons in the locus coeruleus but not mDA neurons.

关键词： noradrenaline hippocampus connectivity DAT neurogenesis

Tungsten Promoted Ni/Al_2O_3 Catalysts for Carbon Dioxide Reforming of Methane to Synthesis Gas

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Chemical Research in Chinese Universities 2004年第4期20卷 470-477页

作者： Thomas Suhartanto Andrew P. E. York Malcolm l. H. Green wolfson Catalysis Centre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of OxfordWolfson Catalysis Centre Inorganic Chemistry Laboratory University of Oxford South Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UKSouth Parks Road Oxford OX1 3QR UK

A series of tungsten promoted alumina supported nickel catalysts has been prepared for the carbon dioxide reforming of methane to synthesis gas. The catalysts have been characterized by means of XRD, TEM, and laser Raman spectroscopy. It is shown that the addition of tungsten to the nickel catalyst can stabilize the catalyst and increase the resistance to carbon deposition. Adding a suitable amount of tungsten can also increase the catalyst activity to be close to that of supported noble metal catalysts. The carburisation of the tungsten modified nickel catalyst decreases the catalyst activity at lower reaction temperatures(lyst performance at higher reaction temperatures. The alumina supported nickel catalyst modified by 0.67%(mass fraction) WO_3 has the equivalent equilibrium constant of the dry reforming reaction to that of alumina supported 5%(mass fraction) Ru at 873 K, and also has a lower activation energy for dry reforming than the latter.

关键词： Nickel catalyst Tungsten modifier CO_2 reforming Methane Syngas

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