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2313篇 您的检索式:作者名="Smart"
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1蜜瓜和西瓜果汁的射频介电特性及其与糖度的关系显示文摘为了解果汁的介电特性与其主要内部品质——糖度之间的关系,该文利用末端开路的同轴探头和阻抗分析仪测量了10 MHz~1.8 GHz的频率范围内不同成熟度的3个品种密瓜汁和4个品种西瓜汁的介电特性,同时测量了反映果汁糖度的可溶性固形物含量和果肉的含水率,分析了介电特性和糖度间的关系。结果显示:密瓜和西瓜果汁的相对介电常数和介质损耗因数皆随频率的增大单调减小,品种间的差异对介电特性有影响;1.8 GHz下密瓜汁的损耗角正切与糖度有较好的线性关系,其决定系数为0.784,但西瓜汁的介电特性与糖度的相关性较差;密瓜和西瓜果汁的糖度与果肉的含水率有很好的线性相关性,其决定系数分别为0.973和0.906。该研究将为基于介电特性的果汁糖度检测仪的开发提供了研究基础。郭文川 Smart O. Nelson Samir Trabelsi Stanley J. Kays 2008农业工程学报2008,24,5:38
2Thrips: Pests of Concern to China and the United States显示文摘Thrips are among the most important agricultural pests globally because of the damage inflicted by their oviposition, feeding, and ability to transmit plant viruses. Because of their invasiveness, a number of pest species are common to both China and the United States and present significant challenges to growers of a wide range of crops in both countries. Among the pest thrips common to both countries are four of the major global thrips pests, Frankliniella occidentalis (Pergande), Scirtothrips dorsalis Hood, Thrips palmi Karny, and Thrips tabaci Lindeman. This review addresses characteristics that enable thrips to be such damaging pests and how biological attributes of thrips create challenges for their management. Despite these challenges, a number of successful management tactics have been developed for various cropping systems. We discuss some of these tactics that have been developed, including the use of cultural controls, biological controls, and judicious use of insecticides that do not disrupt overall pest management programs. The exchange of this type of information will help to facilitate management of pest thrips, especially in regions where species have recently invaded. A prime example is F. occidentalis, the western flower thrips, which is native to the United States, but has recently invaded China. Therefore, management tactics developed in the United States can be adapted to China. Because further success in management of thrips requires a thorough understanding of thrips ecology, we discuss areas of future research and emphasize the importance of collaboration among different countries to enhance our overall understanding of the biology and ecology of thrips and to improve management programs for these widespread pests.Smart R Reitz GAO Yu-lin LEI Zhong-ren 2011Agricultural Sciences in China2011,10,6:18
3New Developments in Structural Health Monitoring Based on Diagnostic Lamb Wave显示文摘Structure health monitoring based on diagnostic Lamb waves has been found to be one of the most promising techniques recently. This paper has a brief review of the new developments on this method including the basic novel of the method, fundamentals and mathematics of Lamb wave propagation, narrowband and wideband Lamb wave excitation methods, optimization of excitation factors and diagnostic Lamb wave interpretation methods.Shenfang YUAN, Yingdi XU and Ge PENGThe Smart Materials & Structures Aeronautic Key Laboratory, Nanjing University of Aeronautic and Astronautic, Nanjing 210016, China 2004Journal of Materials Science & Technology2004,20,5:9
4Radiofrequency ablation for early oesophageal squamous neoplasia:Outcomes form United Kingdom registry显示文摘AIM:To report outcomes on patients undergoing radiofrequency ablation(RFA)for early oesophageal squamous neoplasia from a National Registry.METHODS:A Prospective cohort study from 8 tertiary referral centres in the United Kingdom.Patients with squamous high grade dysplasia(HGD)and early squamous cell carcinoma(ESCC)confined to the mucosa were treated.Visible lesions were removed by endoscopic mucosal resection(EMR)before RFA.Following initial RFA treatment,patients were followed up 3monthly.Residual flat dysplasia was treated with RFA until complete reversal dysplasia(CR-D)was achieved or progression to invasive Squamous cell cancer defined as infiltration into the submucosa layer or beyond.The main outcome measures were CR-D at 12 mo from start of treatment,long term durability,progression to cancer and adverse events.RESULTS:Twenty patients with squamous HGD/ESCC completed treatment protocol.Five patients(25%)had EMR before starting RFA treatment.CR-D was 50%at12 mo with a median of 1 RFA treatment,mean 1.5(range 1-3).Two further patients achieved CR-D with repeat RFA after this time.Eighty per cent with CR-D remain dysplasia free at latest biopsy,with median follow up 24 mo(IQR 17-54).Six of 20 patients(30%)progressed to invasive cancer at 1 year.Four patients(20%)required endoscopic dilatations for symptomatic structuring after treatment.Two of these patients have required serial dilatations thereafter for symptomatic dysphagia with a median of 4 dilatations per patient.The other 2 patients required only a single dilatation to achieve an adequate symptomatic response.One patient developed cancer during follow up after end of treatment protocol.CONCLUSION:The role of RFA in these patients re-mains unclear.In our series 50%patients responded at12 mo.These figures are lower than limited published data.Rehan J Haidry Mohammed A Butt Jason Dunn Matthew Banks Abhinav Gupta Howard Smart Pradeep Bhandari Lesley Ann Smith Robert Willert Grant Fullarton Morris John Massimo Di Pietro Ian Penman Marco Novelli Laurence B Lovat 2013World Journal of Gastroenterology2013,19,36:7
5鞘内注射巴氯芬治疗卒中后痉挛性肌张力增高的专家共识指南显示文摘卒中后痉挛性肌张力增高可导致畸形、不适和运动功能缺损加重,鞘内注射巴氯芬(ITB)已经被越来越多地用于这种并发症的处理。由于它在卒中中的应用不像其他适应证一样得到肯定,因此ITB治疗尚未经过严格的研究。指导临床医生在这类患者中进行ITB治疗的证据非常有限。本文旨在对有关这一主题的现有科学文献和一些专家观点进行评价,同时阐述这些专家针对可能影响卒中人群的常见临床问题治疗决策的推荐意见。Gerard E. Francisco Smart A. Yablon Mya C. Schiess Laura Wiggs Steven Cavalier Samuel Grissom 李振光(译) 孙新虎(译) 迟相林(译) 蒋东晓(译) 丛艳斌(译) 2008国际脑血管病杂志2008,16,3:4
6Annual growth banding in a cave stalagmite显示文摘Baker A Smart P Edwards R 1993Nature1993,364,:2
7Polyclonal and allergen-induced cytokine responses in adults with asthma: Resolution of asthma is associated with normalization of IFN-γ responses显示文摘Joanne M. Smart Elisabeth Horak Andrew S. Kemp Colin F. Robertson Mimi L.K. Tang 2002The Journal of Allergy and Clinical Immunology2002,,3:2
8Gliotoxin Stimulates the Apoptosis of Human and Rat Hepatic Stellate Cells and Enhances the Resolution of Liver Fibrosis in Rats显示文摘Matthew C. Wright Razo Issa David E. Smart Nathan Trim Graeme I. Murray John N. Primrose Michael J.P. Arthur John P. Iredale Derek A. Mann 2001Gastroenterology2001,,3:2
9清管和化学处理在管线维护中的应用显示文摘化学处理和利用清管器的机械清理是两种最常见的管线内部维护方法 ,为了对管线发生的问题进行高效低耗的控制 ,在实际应用中常把二者结合起来。本文对管线运行过程中内部可能发生的各种问题进行了分析 ,并提出了可行的处理方法。最后 。刘丹 姚煦春 Gary Smith John Smart 2001国外油田工程2001,17,4:2
10Geochemical characterization of Granitoids in Katchuan Irruan area: further evidence for peraluminous and shoshonitic compositions and post-collisional setting of granitic rocks in the Precambrian Basement Complex of Nigeria显示文摘Petrographic studies on Granitoids from Katchuan Irruan and adjoining areas,southeastern Nigeria,has shown that they are garnetiferous biotite granite,aplitic granite,porphyritic hornblende biotite granite,porphyritic muscovite biotite granite,weakly foliated leucogranodiorite and simple pegmatite.They are closely associated with the Precambrian Basement Complex rocks which they intruded.Modal analysis shows that the rocks consist of quartz(10%-25%),oligoclase(10%-30%),K-feldspar(15%-35%),biotite(3%-25%),with occasional garnet,hornblende,muscovite,and accessory chlorite,haematite and magnetite.Geochemical data indicates that the rocks are generally shoshonitic,alkali-calcic to calcic,ferroan and peraluminous.They are enriched in large ion lithophile elements as well as high field strength elements(Hf,Ta,Yb,Sm,Zr and Y).Their trace elements and REE patterns are similar,indicating that they are co-genetic.They are characterized by high fractionation factor(La/Yb)N(3.04-228.44)and pronounced negative Eu anomalies(Eu/Eu*)(0.23-0.71).Their overall geochemical features indicate that they were most likely derived from partial melting of crustal materials in an orogenic(post-collisional)tectonic setting.They are therefore related to the Pan-African granites,otherwise known as the Older Granites which were emplaced during the Pan African orogenic event.Chinedu U.Ibe Smart C.Obiora 2019Acta Geochimica2019,38,5:2
11The meaning of the API - RP- 14 - E formula for erosion corrosion in oil and gas production显示文摘Smart J S 1991Corrosion1991,468,:2
12A molecular roadmap for induced multi-lineage transdifferentiation of fibroblasts by chemical combinations显示文摘Xiaoping Han Hao Yu Daosheng Huang Yang Xu Assieh Saadatpour Xia Li Lengmei Wang Jie Yu Luca Pinello Shujing Lai Mengmeng Jiang Xueying Tian Fen Zhang Yanhong Cen Yuko Fujiwara Wei Zhu Bin Zhou Tianhua Zhou Hongwei Ouyang Jianan Wang Guo-Cheng Yuan Shumin Duan Smart H Orkin Guoji Guo 2017Cell Research2017,27,3:2
13Interplay between Perovskite Magic-Sized Clusters and Amino Lead Halide Molecular Clusters显示文摘Recent progress has been made on the synthesis and characterization of metal halide perovskite magic-sized clusters(PMSCs)with ABX_(3)composition(A=CH_(3)NH_(3)^(+)or Cs^(+),B=Pb^(2+),and X=Cl^(−),Br^(−),or I^(−)).However,their mechanism of growth and structure is still not well understood.In our effort to understand their structure and growth,we discovered that a new species can be formed without the CH_(3)NH_(3)^(+)component,which we name as molecular clusters(MCs).Specifically,CH_(3)NH_(3)PbBr_(3)PMSCs,with a characteristic absorption peak at 424 nm,are synthesized using PbBr_(2)and CH_(3)NH_(3)Br as precursors and butylamine(BTYA)and valeric acid(VA)as ligands,while MCs,with an absorption peak at 402 nm,are synthesized using solely PbBr_(2)and BTYA,without CH3NH3Br.Interestingly,PMSCs are converted spontaneously overtime into MCs.An isosbestic point in their electronic absorption spectra indicates a direct interplay between the PMSCs and MCs.Therefore,we suggest that the MCs are precursors to the PMSCs.From spectroscopic and extended X-ray absorption fine structure(EXAFS)results,we propose some tentative structural models for the MCs.The discovery of the MCs is critical to understanding the growth of PMSCs as well as larger perovskite quantum dots(PQDs)or nanocrystals(PNCs).Evan T.Vickers Ziyi Chen Vivien Cherrette Tyler Smart Peng Zhang Yuan Ping Jin Z.Zhang 2021Research2021,,1:2
14A survey of overuse running injuries显示文摘CLEMENT D B TAUNTON J E SMART G W 1981Phy Sports Med1981,9,:1
15Cell-specific regulation of gene expression in mitochondria dudng anther development in sunflower 显示文摘Smart C J Moneger F Lcaver C J 1994The Plant Cell1994,6,:1
16GDF11 modulates NGN3+ islet progenitor cell number and promotes beta-cell differentiation in pancreas development显示文摘Harmon E B Apelqvist A A Smart N G 2004Development2004,131,24:1
17Investigations of the toxic mechanisms of ammonia to fish -gas exchange in rainbow trout (Salmo gairdneri ) exposed to acutely lethal concentrations 显示文摘Smart G 1978J Fish Biol1978,12,:1
18An ID-based Authenticated Key Agreement Protocol Based on the Well Pairing 显示文摘Smart N 2002Electronic Letters2002,38,13:1
19Use of subtraetive hybridization to identify a diagnostic probe for a cystic fibrosis epidemic strain of Pseudomonas aeruginosa显示文摘Parsons YN Panagea S Smart CH 2002J Clin Microbiol2002,40,12:1
20High-resolution records of soil humification and paleoclimate change from variations in speleothem luminescence excitation and emission wavelengths 显示文摘Baker A Genty D Smart P 1998Geology1998,26,10:1
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