陈化粮中黄曲霉毒素检测解决方案

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

TOC与COD的测定方法不同。测定COD是采用强氧化剂和加热回流的方法，只能将水中的有机物部分氧化（氧化率较低），并且测定时间较长，即使目前一些快速的

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。

自然界中约有99%的微生物无法在实验室条件下培养纯化，对于环境或临床样本中的微生物群落研究，需要一种非培养依赖且同时覆盖多种微生物类型的检测技术，能对微生物群落进行种属水平的鉴定及定量分析，使得微生物鉴定更加全面、准确及高效。 华大智造基于自主研发的高通量测序平台和病原感染快速鉴定系统，开发出一套病原微生物检测整体解决方案，可实现在本地快速、准确、全面的对原始标本中的微生物进行分类鉴定，并自动出具分析结果，为感染性疾病的诊疗提供参考。同时，我们也提供多种病原微生物检测整体解决方案的组合，用户可根据需求灵活选择硬件及配套试剂耗材。