检索结果-南通市图书馆

Human Eosinophil Cell Manipulat.on by Opt.cal t.eezers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Biophysics 2024年第3期14卷 330-338页

作者： Pavel Yale Jean Michel Edoukoua Konin Abadê Ange-Boris N’guessan Michel Abaka Kouacou Jérémie t. zoueu Laborat.ire dInst.ument.t.on Image et Spectroscopie (L2IS) Institut National Polytechnique Houphout-Boigny (INPHB) Yamoussoukro Cte dIvoire Laborat.ire de Chimie et.de Physique Appliques Sciences et Techniques Universit Alassane Ouattara Bouak Cte dIvoire

In t.is work, lat.ral deformat.on of human eosinophil cell during t.e lat.ral indent.t.on by an opt.cally t.apped microbead of diamet.r 4.5 µm is st.died. t.e images were capt.red using a CCD camera and t.e Bolt.mann st.t.st.cs met.od was used for force calibrat.on. Using t.e Hert. model, we calculat.d and compared t.e elast.c moduli result.ng from t.e lat.ral force, showing t.at.t.e differences are import.nt.and t.e force should be considered. Besides t.e lat.ral component. t.e set.p also allows us t. examine t.e lat.ral cell-bead int.ract.on. t.e mean values of t.e propert.es obt.ined, in part.cular t.e elast.c st.ffness and t.e shear st.ffness, were Eh = (37.76 ± 2.85) µN/m and Gh = (12.57 ± 0.32) µN/m. t.ese result. show t.at.t.e lat.ral indent.t.on can t.erefore be used as a rout.ne met.od for cell st.dy, because it.enabled us t. manipulat. t.e cell wit.out.cont.ct.wit. t.e laser.

关键词： Opt.cal t.eezers Human Eosinophil Cell Indent.t.on Shear St.ffness

Charact.rizat.on of a Mult.modal and Mult.spect.al Led Imager: Applicat.on t. Organic Polymer’s Microspheres wit. Diamet.r Φ = 10.2 μm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Opt.cs and Phot.nics Journal 2016年第7期6卷 171-183页

作者： Marcel A. Agnero Jérémie t. zoueu Kouakou Konan Laborat.ire d’Inst.ument.t.on d’Image et.Spect.oscopie Institut National Polytechnique Félix Houphou&#235 t.Boigny Yamoussoukro C&#244 t. d’Ivoire Laborat.ire de Physique de la Mat.ère Condensée et.t.chnologie University Félix Houphou&#235 t.Boigny Abidjan C&#244 t. d’Ivoire

Mult.spect.al microscopy enables informat.on enhancement.in t.e st.dy of specimens because of t.e large spect.al band used in t.is t.chnique. A low cost.mult.mode mult.spect.al microscope using a camera and a set.of quasi-monochromat.c Light.Emit.ing Diodes (LEDs) ranging from ult.aviolet.t. near-infrared wavelengt.s as illuminat.on sources was const.uct.d. But.t.e use of a large spect.al band provided by non-monochromat.c sources induces variat.on of focal plan of t.e imager due t. chromat.c aberrat.on which rises up t.e diffract.on effect. and blurs t.e images causing shadow around t.em. It.result. in discrepancies bet.een st.ndard spect.a and ext.act.d spect.a wit. microscope. So we need t. calibrat. t.at.inst.ument.t. be a st.ndard one. We proceed wit. t.o t.pes of images comparison t. choose t.e reference wavelengt. for image acquisit.on where diffract.on effect.is more reduced. At.each wavelengt. chosen as a reference, one image is well cont.ast.d. First. we compare t.e t.irt.en well cont.ast.d images t. ident.fy t.at.present.ng more reduced shadow. In second t.me, we det.rmine t.e mean of t.e shadow size over t.e images from each set. t.e correct.on of t.e discrepancies required measurement. on filt.rs using a st.ndard spect.omet.r and t.e microscope in t.ansmission mode and reflect.on mode. t. evaluat. t.e capacit. of our device t. t.ansmit.informat.on in frequency domain, it. modulat.on t.ansfer funct.on is evaluat.d. Mult.variat. analysis is used t. t.st.it. capacit. t. recognize propert.es of well-known sample. t.e wavelengt. 700 nm was chosen t. be t.e reference for t.e image acquisit.on, because at.t.is wavelengt. t.e images are well cont.ast.d. t.e measurement.made on t.e filt.rs suggest.d correct.on coefficient. in t.ansmission mode and reflect.on mode. t.e experiment.l inst.ument.recognized t.e microsphere’s propert.es and led t. t.e ext.act.on of t.e st.ndard t.ansmit.ance and reflect.nce spect.a. t.erefore, t.is microscope is used as a convent.onal

关键词： Mult.spect.al Imaging Reference Wavelengt. Correct.on Coefficient. Modulat.on t.ansfer Funct.on

Classificat.on of African Mosaic Virus Infect.d Cassava Leaves by t.e Use of Mult.-Spect.al Imaging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Opt.cs and Phot.nics Journal 2015年第8期5卷 261-272页

作者： Mama Sangare t.érèse At.ham Agneroh Olivier Kossan Bagui Issiaka t.aore Abdramane Ba jeremie t.ouakesseh zoueu Laborat.ire d’Opt.que de Spectroscopie et des Sciences de l’Atmosphere Université des Sciences Techniques et Technologies de Bamako (USTTB) Bamako Mali Laborat.ire de Phyt.pat.ologie et.Biologie Végét.le Institut National Polytechnique Felix Houphou&#235 t.Boigny Yamoussoukro Cote d’Ivoire Laborat.ire d’Inst.ument.t.on Image et.Spect.oscopie Institut National Polytechnique Felix Houphou&#235 t.Boigny Yamoussoukro Cote d’Ivoire

In t.is work, we have used mult.spect.al imaging t.chnology t. classify cassava leaves infect.d by African mosaic virus by t.e use of t.eir unique spect.al finger print. t.e spect.a are ext.act.d from t.ansmission, reflect.on and diffusion of t.eir mult.spect.al images;t.ey have been t.en analyzed wit. st.t.st.cal mult.variat. analysis t.chniques. Principal component.analysis (PCA) has been used followed by K-means and Ascending Hierarchical Classificat.on (AHC) t. endorse t.e classificat.on. t.e cont.ibut.on of t.is work is t.e use of mult.spect.al imagery which binds bot. spat.al and spect.al informat.on t. different.at. and sort.infect.d leaves. t.e result. show t.at.t.e mult.modal and imaging spect.oscopy may allow blind ident.ficat.on and charact.rizat.on of infect.d leaves.

关键词： Classificat.on Infect.d Leaves African Cassava Mosaic Virus Mult.spect.al Imaging

St.uct.red Imagery Processing St.at.gies for Spect.oscopic Measurement.in Dense Solut.ons

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2017年第6期7卷 262-281页

作者： t.omas Koffi Guy-Oscar Regnima Jocelyne Bosson Olivier Bagui Mensah Edoé Jérémie t. zoueu Laborat.ire d’Inst.ument.t.on Image et Spectroscopie(L2IS) Institut National Polytechnique Felix Houphou&euml t.Boigny Departementde Formation et de Recherche du Genie Electrique et Electronique Yamoussoukro C&ocirc t. d’Ivoire Laborat.ire de physique Fondamant.le Appliquée(LPFA) Université NanguiAbrogoua Unité de Formation et de Recherche des Sciences Fondamentales Appliquées Abidjan C&ocirc t. d’Ivoire

Absorbance measurement.in dense media via convent.onal opt.cal spect.oscopy t.chniques leads t. inaccurat. result.. t.is is mainly due t. mult.ple scat.ering phenomena t.at.cont.ibut. t. t.e overall light.ext.nct.on in t.e int.rrogat.d sample. t.is limit.t.on imposes t.e use of dilut. solut.ons for absorpt.on spect.oscopy. However, depending on t.e polarit. of t.e solvent.used, t.e absorpt.on spect.um may vary over a given solut.on. St.uct.red illuminat.on t.chnique offers an alt.rnat.ve t. t.is problem, and provides t.e abilit. t. calculat. in-sit. opt.cal propert.es in dense media. In t.is paper, we propose t.o processing met.ods applied t. images acquired by st.uct.red laser illuminat.on planar imaging (SLIPI) t.chnique t. ext.act.ext.nct.on coefficient. μ_e of probed solut.ons: t.e first.is based on t.e implement.t.on of principal component.analysis (PCA) and t.e second, on t.e calculat.on of Mean Value. In pract.ce, t.o kinds of st.dies were carried out. one quant.t.t.ve set.of measurement. wit.in chlorophyll liquid solut.ons and a second set.wit. concent.at.d coffee solut.ons, wit. cont.olled proport.on and concent.at.ons for each sample. t.ese t.o proposed analyt.cal t.chniques are advant.geous because t.ey are very easy t. implement.and provide a much simpler alt.rnat.ve t. t.e previous one. Bot. met.ods offer sat.sfact.ry result., similar t. t.ose obt.ined wit. t.e original met.od which is based on 1D Fourier t.ansform.

关键词： Spect.ophot.met.y Dense Media Ext.nct.on Coefficient St.uct.red Illuminat.on Principal Component Analysis

Mult.-Spect.al and Fluorescence Imaging in Prevent.on of Overdose of Herbicides: t.e Case of Maize

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Spect.al Analysis Review 2017年第2期5卷 11-24页

作者： Anicet.K. Kouakou Adama P. Soro Alvarez K. t.ky Jérémie t. zoueu Laborat.ire de Crist.llographie et.Physique Moléculaire Université Félix Houphou&euml t.Boigny Abidjan C&ocirc t. d’Ivoire Laborat.ire d’Inst.ument.t.on Image et.Spect.oscopie INP-HB DFR-GEE Yamoussoukro C&ocirc t. d’Ivoire

Evaluat.on of t.e impact.of herbicides on maize was done t.rough mult.- spect.al and mult.-modal imaging and mult.-spect.al fluorescence imaging combined wit. st.t.st.cal met.ods. Spect.a cont.ining 13 wavelengt.s ranging from 375 nm t. 940 nm were derived from mult.-spect.al images in t.ansmission, reflect.on and scat.ering mode and fluorescence images obt.ined using high-pass filt.rs (F450 nm, F500 nm, F550 nm, F600 nm, F650 nm) on cont.ol maize samples and maize samples t.eat.d wit. Herbext.a herbicide were used. t.e appearance of t.e spect.a allowed us t. charact.rize t.e effect.of t.e herbicide on t.e maize pigment.concent.at.on. t.e fluorescence images allowed us t. t.ack t.e fat. of absorbed energy and t.rough PLS-DA and SVM-DA t. discriminat. t.e t.o leaf cat.gories wit. very low error rat.s for t.e t.st. i.e. 4.9% and 2% respect.vely. t.e result. of t.is t.chnique can be used in t.e cont.xt.of precision agricult.re.

关键词： Maize Herbext.a Mult.-Spect.al Imaging Mult.modal Imaging Fluorescence PLS-DA SVM-DA

Use of Fluorescence and Reflect.nce Spect.a for Predict.ng Okra (&lt.i&gt.Abelmoschus esculent.s&lt./i&gt.) Yield and Macronut.ient.Cont.nt. of Leaves

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2017年第10期7卷 537-558页

作者： Wilfried G. Dibi Jocelyne Bosson Irié Casimir Zobi Bi t.a t.é Jérémie t. zoueu Laborat.ire d’Inst.ument.t.on Image et.Spect.oscopie Unité Mixte de Recherche et d’Innovation en Electricité et Electronique Appliquées Ecole Supérieure d’Industrie Institut Nationale Polytechnique Houphouet-Boigny Yamoussoukro C&ocirc t. d’Ivoire Laborat.ire de Physique Fondament.le et.Appliquée Unité de Formation et de Recherche en Sciences Fondamentales et Appliquées Université Nangui Abrogoua Abidjan C&ocirc t. d’Ivoire Laborat.ire de Pédologie Ecole Supérieure d’Agronomie Institut Nationale Polytechnique Houphouet-Boigny Yamoussoukro C&ocirc t. d’Ivoire

In-field proximal sensing of most.major crops nut.ient. st.ll remains an economical and t.chnical challenge. For t.is purpose, t.e use of effect.ve mult.-excit.t.on fluorescence and reflect.nce wavelengt.s is explored in t.is work on Okra plant. Visible-near infrared (400 - 1000 nm) reflect.nce and mult.-fluorescence dat. were collect.d at.leaf scale in a chemically fert.lized field by using an USB spect.omet.r mount.d wit. an Arduino-based LED driver clip. N, P, K and Ca cont.nt.of samples leaves were measured using reference met.ods. Average pods yield and leaves macronut.ient. cont.nt.were calibrat.d using IRIV-PLS regression aft.r spect.a pret.eat.ent.. Single informat.ve wavelengt.s bands in reflect.nce, red and far-red fluorescences were select.d for building yield and macronut.ient.cont.nt.models. We showed t.at.flowering st.ge was more suit.ble for yield predict.on. Moderat.ly useful macronut.ient.models were found in Ca cont.nt.(RPDval = 1.93, rP = 0.818) and pot.ssium cont.nt.wit. RPDval = 1.8, rP = 0.88. P and N yielding predict.on performance of RPDval = 1.61 (rP = 0.718 ) and RPDval = 1.46 (rP = 0.56) respect.vely were less accurat.. t.is st.dy demonst.at.s pot.nt.alit. of fluorescence and reflect.nce spect.oscopy for accurat. est.mat.on of leaf macronut.ient.cont.nt.and crop yield. High select.vit. obt.ined from result.d spect.al bands could lead t. t.e development.of reliable, rapid and cost.effect.ve devices for nut.ient.diagnosis.

关键词： Proximal Sensing Fluorescence and Reflect.nce Fert.lized Field Macronut.ient. Cont.nt Pods Yield

Det.rminat.on of t.e Deep Opt.cal Propert.es of Healt.y and Diseased Skin Using Diffuse Reflect.nce Spect.oscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Opt.cs and Phot.nics Journal 2022年第8期12卷 191-199页

作者： Didier K. Yable Laurent.Canale t.éodore Cissé Haba Pascal Dupuis Georges Zissis zoueu t. Jérémie LAPLACE Universit&eacute de t.ulouse CNRS INPT UPS Toulouse France L2IS &Eacute cole Doct.rale Polyt.chnique UMRI 78 INP-HB Yamoussoukro C&ocirc t. d’Ivoire

In t.is st.dy, we focused on diffuse reflect.nce spect.oscopy, a rapid and noninvasive spect.oscopy t.chnique t.at.has considerable pot.nt.al for medical diagnosis. In order t. bet.er underst.nd and analyze t.e signals induced by t.is met.od, we performed a series of in vivo measurement. on healt.y and diseased skin. Measurement.sit.s on a human hand and feet.were chosen. Some preliminary result. obt.ined on t.ese sit.s show t.e feasibilit. of t.is t.chnique in clinics.

关键词： Diffuse Reflect.nce Spect.oscopy Human Skin Opt.cal Propert.es Lesion Signal

Geochemical and geochronological const.aint. on an Early Palaeozoic Cascadia-t.pe act.ve margin in t.e Dunhuang block(NW China)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geochemical and geochronological constraints on an Early Pal...

低剂量白细胞介素-2在11种自身免疫疾病中的免疫学和临床疗效:单中心开放临床试验

作者： jeremie Soldner Chao Yuan Karel Schulmann Pavla ?t.pská Yunying Zhang Zongying Huang Xinyu Wang

t.e t.rim and Nort. China Crat.ns locat.d in t.e sout. of t.e Cent.al Asian Orogenic Belt.record a complex Early Palaeozoic t.ct.no-met.morphic evolut.on. Up t. now, such evolut.on of t.eir nort.ern margins has been int.rpret.d as a result.of t.e sout.ward subduct.on of t.e Paleo-Asian Ocean and associat.d rift.ng (e.g. De Jong et.al., 2006;Han et.al., 2015).

关键词： NW China Geochemical and geochronological const.aint. on an Early Palaeozoic Cascadia-t.pe act.ve margin in t.e Dunhuang block

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

英国医学杂志中文版 2019年第2期22卷 123-123页

作者： Michelle Rosenzwajg Robert. Lorenzon Pat.ice Cacoub Hang Phuong Pham Fabien Pit.iset.Karim El Soufi Claire RIbet.Claude Bernard Selim Aract.ngi Beat.ice Banneville Laurent.Beaugerie Francis Berenbaum Julien Champey Olivier Chazouilleres Christ.phe Corpechot.Bruno Faut.el Arsfene Mekinian Elodie Regnier David Saadoun Joe-Elie Salem jeremie Sellam Philippe Seksik Anne Daguenel-Nguyen Valene Doppler jeremie Mariau Eric Vicaut.David Klat.mann 杨新蕾(译) 张卓莉(校) 不详北京大学第一医院

背景调节性t.t.egs)细胞可以预防自身免疫并控制炎症,在各种自身免疫性或自身炎症性疾病中的研究都表明t.eg细胞不足。由于低剂量白细胞介素-2(low-dose int.rleukin-2,ld-IL2)能够扩增并激活t.egs细胞,因此ld-IL2具有广泛的治疗潜力。... 详细信息

背景调节性t.t.egs)细胞可以预防自身免疫并控制炎症,在各种自身免疫性或自身炎症性疾病中的研究都表明t.eg细胞不足。由于低剂量白细胞介素-2(low-dose int.rleukin-2,ld-IL2)能够扩增并激活t.egs细胞,因此ld-IL2具有广泛的治疗潜力。目的我们通过一项临床试验观察ld-IL2治疗11种自身免疫性疾病中1种的效果,旨在评估ld-IL2的治疗潜力并选择疾病,以用于进一步的临床开发。方法本研究为前瞻开放性Ⅰ~Ⅱa期临床观察,入选了46例轻中度患者,诊断分别为类风湿关节炎、强直性脊柱炎、系统性红斑狼疮、牛皮癣、白塞病、肉芽肿性多血管炎、大动脉炎、克罗恩病、溃疡性结肠炎、自身免疫性肝炎或硬化性胆管炎。所有患者都接受了ld-IL2(100万IU/天)5天,然后每两周注射一次,维持6个月。所有患者均接受了深入的免疫监测和临床评估。结果在任何疾病类型以及任何合并药物治疗的患者中,ld-IL2都显示出了良好的耐受性。通过经典的免疫表型分析和广泛的免疫表型分析发现所有患者的t.egs细胞均被特异性地扩增激活,而效应t.胞没有被活化,提示ld-IL2具有临床疗效的前景。结论本研究中所采用的IL-2剂量和治疗方案可以选择性地激活和扩增t.egs细胞,并且对于不同的疾病种类以及不同的合并用药都是安全的。这一临床疗效以及初步结果可以为ld-IL2在各种自身免疫和自身炎症性疾病中开展Ⅱ期临床试验观察疗效提供了依据。试验注册号NCt.1988506.

关键词：白细胞介素-2 自身免疫疾病临床疗效临床试验低剂量自身免疫性疾病免疫学免疫表型分析