2014/10/31 08:52
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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
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安捷伦提供多种独特的高质量 Seahorse XF 分析试剂盒、试剂和培养基,用于研究细胞能量代谢功能并实时评估线粒体和糖酵解功能。以简化实验程序和提高研究效率为设计宗旨,使用这些试剂盒能让您简捷地获得高质量恒定的数据。结合安捷伦出色的技术服务,这些试剂盒将极大地提高您的 XF 实验效率和体验。
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当称量仪器用于与质量控制相关的测量时,校准是必须定期执行的关键操作之一。国际上有许多标准规范都有这方面的要求,例如ISO9001、GMP法规以及与食品安全相关的一些标准。然而关于校准的定义、实施和校准的具体操作在全球范围内并没有一个完全统一的标准。在此,我们首先需要了解一下什么是校准,以及与调整和检定的区别。
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2022/04/23