2015/03/06 14:42
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人可溶性粘附分子(Sam)检测试剂盒
型号: 96T/48T
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品牌: IBL-America
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NanoBrook产品应用-12-ZetaPALS
文献名: Structural, morphological and optical properties of Bi NPs obtained by laser ablation and their selective detection of L-cysteine 作者: Ramon Gabriel Teixeira Rosaa, Celso de Araujo Duartea , Wido Herwig Schreinera, Ney Pereira Mattoso Filhoa, Arandi Ginane Bezerra Jr.b, Andersson Barisonc, Fernanda Maria Marins Ocamposc a Departamento de Física, Universidade Federal do Paraná Centro Politécnico, CP 19044, 81531-990 Curitiba (PR), Brazil b Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba (PR), Brazil c Departamento de Química, Universidade Federal do Paraná Centro Politécnico, CP 19081, 81531-990 Curitiba (PR), Brazil 摘要:In the present work we show the results of the investigation of the properties of bismuth nanoparticles (NPs) obtained by the laser ablation in water. The samples were characterized by various techniques: UV/vis spectroscopy, dynamic light scattering, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, nuclear magnetic resonance and zeta potential. The NPs were metallic and surface oxidated, exhibiting absorption peak at 257 nm due to the surface plasmon resonance. The interaction between the NPs and various amino acids was studied and revealed a selective sensibility to cysteine on a range of concentration from 80 to 720 μM, which we attribute to a dimerization of cysteine to cystine probably complexed to the nanoparticle surface by electrostatic interactions, leading to the modification of the NP absorption spectrum. 关键词:Bismuth; Nanoparticles; Laser ablation; Cysteine
2015/04/16
使用Millipak® Final Fill过滤器及吹扫步骤达到最大化产品收率
Millipak® Final Fill过滤器的特殊层叠式设计可最大程度地减少残留体积,从而增加产品回收。过滤器吹扫亦可有效降低折叠膜和层叠式过滤器使用后的残留量。
生物产业
2020/04/30
Nexsa G2小束斑+特色SnapMap快照成像功能分析SnOₓ成分半导体器件
近几年来,随着国内科技产业的不断升级,对微电子器件的需求日益增加。特别是高科技产品的快速发展,比如智能手机、电脑、无人机、新能源汽车、智能机器人等,对高性能微电子器件的需求更是呈指数级增长,这使得微电子器件自然而然就成为人们研究的热点材料。在微电子器件的研究中,通常需要对微电子器件表面进行各种加工、改性处理,来使其具有不同的性能。由于X射线光电子能谱仪(XPS)是一种表面分析技术,随着商业化XPS设备的普及,其在微电子器件研究中的应用越来越广泛,逐渐成为微电子器件研究中不可或缺的分析手段。 本方案通过赛默飞最新一代XPS表面分析平台Nexsa G2,对半导体器件表面形成的窄条形SnOx成分进行小束斑+特色SnapMap快照成像测试,展示如何通过设备小束斑+成像功能,快速全面分析这类特殊小尺寸半导体器件表面成分及其在面内分布情况,来辅助评估表面处理效果及器件质量。
电子/电气
2023/01/10
应用方案 | 原子荧光光谱仪测定蚯蚓中砷含量
砷(As)在自然中广泛存在,砷的长期摄入具有一定的健康风险,其毒性作用主要包括生殖发育毒性、神经毒性、免疫毒性,还可诱发人类发生多种癌症,食品中砷的存在及其对人体健康的风险评估仍是今后需要进一步关注和研究的方向。
农/林/牧/渔
2023/02/24