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Evolving technologies for growing,imaging and analyzing 3D root system architecture of crop plants

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Journal of Integrative Plant Biology 2016年第3期58卷 230-241页

作者： Miguel A.Pieros Brandon G.Larson Jon E.Shaff David J.Schneider Alexandre Xavier Falcao Lixing Yuan Randy T.Clark Eric J.Craft Tyler W.Davis Pierre-Luc Pradier Nathanael M.Shaw Ithipong Assaranurak Susan R.mc Couch Craig Sturrock Malcolm Bennett Leon v.Kochian USDA-ARS Robert Holley Center for Agriculture and Health538 Tower RoadIthacaNY 14580USA Department of Information Systems Institute of ComputingUniversity of CampinasAv.Albert Einstein1251CEP 13083-852CampinasSPBrazil Department of Plant Nutrition China Agricultural UniversityBeijing 100193China Department of Plant Breeding and Genetics Cornell UniversityIthacaNY 14853USA Centre for Plant Integrative Biology School of BiosciencesUniversity of NottinghamSutton BoningtonLE12 5RDUK College of Science King Saud UniversityRiyadh 11451Kingdom of Saudi Arabia

A plant＇s ability to maintain or improve its yield under limiting conditions,such as nutrient de ficiency or drought,can be strongly in fluenced by root system architecture（RSA）,the three-dimensional distribution of the different root types in the soil. The ability to image,track and quantify these root system attributes in a dynamic fashion is a useful tool in assessing desirable genetic and physiological root traits. Recent advances in imaging technology and phenotyping software have resulted in substantive progress in describing and quantifying RSA. We have designed a hydroponic growth system which retains the three-dimensional RSA of the plant root system,while allowing for aeration,solution replenishment and the imposition of nutrient treatments,as well as high-quality imaging of the root system. The simplicity and flexibility of the system allows for modi fications tailored to the RSA of different crop species and improved throughput. This paper details the recent improvements and innovations in our root growth and imaging system which allows for greater image sensitivity（detection of fine roots and other root details）,higher ef ficiency,and a broad array of growing conditions for plants that more closely mimic those found under field conditions.

关键词： Abiotic stress digital root phenotyping mineral nutrition root system architecture

Electrochemical Synthesis and Photocatalytic Property of Zinc Oxide Nanoparticles

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Nano-Micro Letters 2012年第1期4卷 14-24页

作者： Kodihalli G.Chandrappa Thimmappa v.venkatesha Department of P. G. Studies & Research in Chemistry School of Chemical Sciences Jnana Sahyadri campus Kuvempu University

Zinc oxide(ZnO) nanoparticles of varying sizes(20, 44 and 73 nm) have been successfully synthesized by a hybrid electrochemical-thermal method using aqueous sodium bicarbonate electrolyte and sacrificial Zn anode and cathode in an undivided cell under galvanostatic mode at room temperature. The as-synthesized product was characterized by X-ray diffraction(XRD), X-ray photoelectron spectra(XPS), Scanning electron microscopy along with Energy dispersive analysis of X-ray(SEM/EDAX), Transmission electron microscopy(TEM), Ultra violet- Diffuse reflectance spectroscopic methods(Uv-DRS). and Uv-DRS spectral *** as-synthesized compound were single-crystalline and Rietveld refinement of calcined samples exhibited hexagonal(Wurtzite) structure with space group of P63mc(No.186). The band gaps for synthesized ZnO nanoparticles were 3.07, 3.12 and 3.13 e v, respectively, based on the results of diffuse reflectance spectra(DRS). The electrochemically synthesized ZnO powder was used as photocatalysts for Uv-induced degradation of Methylene blue(MB). Photodegradation was also found to be function of exposure time and dye solution p H. It has been found that as-synthesized powder has excellent photocatalytic activity with 92% degradation of MB, indicating ZnO nanoparticles can play an important role as a semiconductor photocatalyst.

关键词： Zinc Oxide Methylene Blue Photocatalytic activity Semiconductor

母乳喂养史和子宫内膜异位症发生的风险：前瞻性队列研究

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英国医学杂志中文版 2018年第3期21卷 177-178页

作者： Leslie v farland A Heather Eliassen Rulla M Tamimi Donna Spiegelman Karin B Michels Stacey A Missmer 龚丽云王淑珍不详首都医科大学附属北京朝阳医院妇产科

目的研究经产妇母乳喂养、纯母乳喂养、产后闭经时间与子宫内膜异位症发病率的关系。设计前瞻胜队列研究。

关键词：内膜增生学习历史风险子宫事件母乳

阿尔茨海默病患者海马及颞叶脑组织中老年斑和神经纤维缠结与补体受体2型的关系(英文)

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中国临床康复 2004年第28期8卷 6212-6214页

作者：张祥建 Patrick L.mc Geer 河北医科大学第二医院神经内科河北省石家庄市050000 KinsmenLaboratory of Neurological Research Uni-versity of British ColumbiaCanada2255Wesbrook MallVancouverBCV6T123

背景:阿尔茨海默病(Alzheimerdisease,AD)发病过程中炎症反应的持续存在是否与病情加重呈正相关性。目的:研究补体受体2型(CR2)在AD患者海马、颞叶脑组织中的表达特征。设计:抽样调查。地点和对象:实验地点为KinsmenLaboratoryofNeurolo... 详细信息

背景:阿尔茨海默病(Alzheimerdisease,AD)发病过程中炎症反应的持续存在是否与病情加重呈正相关性。目的:研究补体受体2型(CR2)在AD患者海马、颞叶脑组织中的表达特征。设计:抽样调查。地点和对象:实验地点为KinsmenLaboratoryofNeurologicalResearch,UniversityofBritishColumbia。研究组为19例AD患者海马、颞叶脑组织,对照组为1例帕金森病、1例遗传性帕金森病、3例多发性硬化、5例皮克病、4例癌症患者、2例心血管疾病、1例感染性疾病和1例慢性阻塞性肺炎患者的海马、颞叶脑组织;阳性对照为扁桃体和脾脏组织。干预:以单克隆和多克隆补体受体2型抗体为一抗,应用免疫组织化学方法和蛋白印迹分析方法对研究对象进行CR2表达情况的研究。主要观察指标:各组患者脑组织CR2表达情况。结果:脾脏与扁桃体的树突状细胞胞浆能够被CR2抗体强烈染色。CR2的抗体也使部分对照组的一些血管内圆形细胞着色。在19例AD患者海马和颞叶新皮质中,由变性的神经突起围绕淀粉样核心构成的老年斑和大脑神经元胞浆内的神经纤维缠结均被CR2强烈着色。结论:CR2在AD患者脑组织炎症反应中可能发挥有害作用。

关键词：患者脑组织颞叶海马补体受体 CR 神经纤维缠结情况结论正相关性

Monte Carlo generator photon jets used for luminosity at e^+e^- colliders

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Chinese Physics C 2010年第6期34卷 877-882页

作者： G.v.Fedotovich E.A.Kuraev A.L.Sibidanov Budker Institute of Nuclear Physics Novosibirsk State University Joint Institute of Nuclear Research

A Monte-Carlo Generator Photon Jets （mcGPJ） to simulate Bhabha scattering as well as production of two charged muons and two photons events is discussed. The theoretical precision of the cross sections with radiative corrections （RC） is estimated to be smaller than 0.2%. The Next Leading Order （NLO） radiative corrections proportional to α are treated exactly, whereas the all logarithmically enhanced contributions, related to photon jets emitted in the collinear region, are taken into account in frame of the Structure Function approach. Numerous tests of the mcGPJ as well as a detailed comparison with other mc generators are presented.

关键词： luminosity e^+e^- hadrons detectors

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急性肾衰竭与甘露醇中毒相关一例

医药导报 1986年第5期 31-31,30页

作者： LCDR Thomag v Whelan mc USN 黄怀庆郑历生黄石市药品检验所黄石市四医院

肾衰竭的病人,如果不受限制地使用甘露醇,就会导致一种潜在的具有生命威胁的甘露醇中毒症,这种并发症目前在美国已有报道。肾脏是排泄甘露醇的主要途径(静脉注射24小时内排泄90％)。肾功能不正常将显著影响排泄,结果导致(甘露醇)在细胞... 详细信息

肾衰竭的病人,如果不受限制地使用甘露醇,就会导致一种潜在的具有生命威胁的甘露醇中毒症,这种并发症目前在美国已有报道。肾脏是排泄甘露醇的主要途径(静脉注射24小时内排泄90％)。肾功能不正常将显著影响排泄,结果导致(甘露醇)在细胞外液间的聚积而中毒。临床上甘露醇中毒的病征表现为:严重的体液负荷过重造成高血压,充血性心力衰竭,外周水肿;中枢神经系统紊乱(包括精

关键词：甘露醇肾衰细胞外液肾功能病人多元醇肾功能衰竭毫当量尿过少

Effects of transdermal magnesium chloride on quality of life for patients with fibromyalgia: a feasibility study

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Journal of Integrative Medicine 2015年第5期13卷 306-313页

作者： Deborah J.Engen Samantha J.mc Allister Mary O.Whipple Stephen S.Cha Liza J.Dion Ann vincent Brent A.Bauer Dietlind L.Wahner-Roedler Department of Physical Medicine and Rehabilitation Mayo Clinic Division of General Internal Medicine Mayo Clinic Division of Biomedical Statistics and Informatics Mayo Clinic

BACKGROUND： Fibromyalgia is a syndrome characterized by chronic pain, fatigue, depression, and sleep disturbances. Its primary cause is unclear. Several studies have reported decreased intracellular magnesium levels in patients with fibromyalgia and have found negative correlation between magnesium levels and fibromyalgia symptoms.OBJECTIvE： To gather preliminary data on whether transdermal magnesium can improve quality of life for women who have fibromyalgia. DESIGN, SETTING, PARTICIPANTS AND INTERvENTIONS： This is a patient questionnaires and survey in a fibremyalgia clinic at a tertiary medical center. Forty female patients with the diagnosis of fibremyalgia were enrolled. Each participant was provided a spray bottle containing a transdermal magnesium chloride solution and asked to apply 4 sprays per limb twice daily for 4 weeks. Participants were asked to complete the Revised Fibromyalgia Impact Questionnaire, SF-36v2 Health Survey, and a quality-of-life analog scale at baseline, week 2, and week 4. MAIN OUTCOME MEASURE： Questionnaire and survey scores, evaluated through intent-to-treat and per-protocol analyses. RESULTS： Twenty-four patients completed the study （mean [SD] age, 57.2 [7.6] years; white, 95%; mean body mass index, 31.3 kg/m2）. With intention-to-treat analysis, Revised Fibromyalgia Impact Questionnaire subscale and total scores were significantly improved at week 2 and week 4 （total score, P = 0.001）. Per-protocol analysis results were similar： all subscales of the Revised Fibremyalgia Impact Questionnaire were significantly improved at week 2 and week 4 （total score, P = 0.001）. CONCLUSION： This pilot study suggests that transdermal magnesium chloride applied on upper and lower limbs may be beneficial to patients with fibromyalgia.

关键词： fibromyalgia magnesium chloride Revised Fibromyalgia Impact Questionnaire clinical trial

Asymptotic Behavior of Solutions of Linear Delay Equations

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Acta Mathematica Sinica,English Series 1987年第4期3卷 289-300页

作者： F.v.Atkinson 张书年 University of Toronto Department of Mathematics Anhui University Canada

The delay differential equations of the formx′(t)=-a(t)x(t-1),t≥0 (*)are considered,where a(t)≥0 is locally integrable on [0,∞).The main result:Let 00,M>1,T≥*** the condition k(t)≤3/2+αc(t),t≥T withsome consta... 详细信息

The delay differential equations of the formx′(t)=-a(t)x(t-1),t≥0 (*)are considered,where a(t)≥0 is locally integrable on [0,∞).The main result:Let 0mc(t′) for t,t′≥T,|t-t′|≤l with some constants l>0,M>1,T≥*** the condition k(t)≤3/2+αc(t),t≥T withsome constant α>0 dependent on l,M,ensures that all solutions of (*) tend to zero as t→∞.

关键词： Asymptotic Behavior of Solutions of Linear Delay Equations

Correlation Functions, Universal Ratios and Goldstone Mode Singularities in n-vector Models

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Communications in Computational Physics 2014年第5期15卷 1407-1430页

作者： J.Kaupuzs R.v.N.Melnik J.Rimsans Institute of Mathematics and Computer Science University of Latvia29 Rai¸na BoulevardLV1459RigaLatvia Institute of Mathematical Sciences and Information Technologies University of Liepaja14 Liela StreetLiepaja LV-3401Latvia Wilfrid Laurier University WaterlooOntarioCanadaN2L 3C5.

Correlation functions in the O(n)models below the critical temperature are *** on Monte Carlo(mc)data,we confirm the fact stated earlier by Engels and vogt,that the transverse two-plane correlation function of the O(4)model for lattice sizes about L=120 and small external fields h is very well described by a Gaussian ***,we show that fits of not lower quality are provided by certain non-Gaussian *** have also tested larger lattice sizes,up to L=*** Fourier-transformed transverse and longitudinal two-point correlation functions have Goldstone mode singularities in the thermodynamic limit at k→0 and h=+0,i.e.,G_(⊥)(k)≈ak−λ_(⊥)and G_(||)(k)≈bk−λk,*** a and b are the amplitudes,k=|k|is the magnitude of the wave vector *** exponentsλ_(⊥),λk and the ratio bM^(2)/a^(2),where M is the spontaneous magnetization,are universal according to the GFD(grouping of Feynman diagrams)*** we find that the universality follows also from the standard(Gaussian)theory,yielding bM^(2)/a^(2)=(n−1)/*** mc estimates of this ratio are 0.06±0.01 for n=2,0.17±0.01 for n=4 and 0.498±0.010 for n=*** to these and our earlier mc results,the asymptotic behavior and Goldstone mode singularities are not exactly described by the standard *** is expected from the GFD *** have found appropriate analytic approximations for G_(⊥)(k)and G_(||)(k),well fitting the simulation data for small *** have used them to test the Patashinski-Pokrovski relation and have found that it holds approximately。

关键词： n-component vector models correlation functions Monte Carlo simulation Goldstone mode singularities.