2011/12/06 14:52
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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
2015/04/16
qTOWER3G上进行新型冠状病毒SARS-COV-2的qPCR检测
市面上有众多的新冠病毒qPCR检测试剂盒,本应用方案采用韩国Seegene公司的AllplexTM 2019-nCoV检测试剂盒在耶拿荧光定量PCR仪 qTOWER³G上进行样品检测,获得符合预期的结果。
生物产业
2020/10/20
布鲁克三维X射线显微镜在药物与医疗器械领域的应用
三维X射线显微镜是当前获取样品内部三维结构最有力的工具之一,而且作为无损的非破坏成像技术,它适用于各种形态的样品,无需包埋,镀层或切片等复杂的样品前处理。布鲁克skyscan系列三维X射线纤维成像系统,包含稳定易用的高分辨率成像设备,功能强大的软件套装,可为不同领域的应用提供完善的解决方案。 我们为大家带来桌面型三维X射线显微镜在药物与医疗器械领域的应用介绍。
医疗/卫生
2021/11/18
智能设备中光学材料的测定实例
智能设备的功能日益多元化,如人脸识别、测距、AR功能等。其中,相机在追求高分辨的 同时,还要求外形小巧、高倍率变焦。 本资料中的数据为测试示例,不代表真实数据,仅供参考。 注意:产品升级后,上述仪器的外观或技术参数可能会有变化。 图2 潜望镜式镜头的示例 通过搭载潜望镜式镜头,可以实现相机的小巧与高倍率变焦。传统相机镜头与智能设备垂直 放置。潜望镜式镜头平行于智能设备安装,从而实现设备的超薄化。此外,变焦倍率越高, 焦距越长,因此,需要一定的纵深空间安放镜头。传统镜头由于是垂直放置,增加焦距则需增加设备厚度,而潜望镜式镜头通过棱镜改变光路方向,将焦距所需要的厚度转化为与智能设备平行的长度,同时实现了超薄化与高倍率变焦。 此次实验,在日立紫外可见近红外分光光度计UH4150上加装微小棱镜测定附件,并使用专用支架※1,测定潜望镜式镜头中的棱镜。
电子/电气
2022/06/14