变压器故障分析中气相色谱技术的运用

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

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。

二氧化硅是用于检测、控制和尽量减少涡轮机、换热器和锅炉结垢的一种关键度量。在线实时测量活性二氧化硅可尽量降低因结垢而产生的维修/更换成本，实现安全高效的长期运行，这款在线二氧化硅分析仪可用于对二氧化硅超标的生产用水的去除或回收进行即时或自动的决策。连续实时二氧化硅监测可快速通知离子交换树脂的RO穿透或饱和情况，从而使系统效率最大化，尽量减少维修停机时间。Orion 8030cX 在线二氧化硅分析仪可配置为在二氧化硅峰值出现时发送警告/警报或测量数据来警告用户，触发纠正措施，防止下游出现问题。

Epsilon 1 仪器主机和用户软件，针对燃料中的硫进行了符合ISO 13032 标准的出厂预校准。针对氯分析进行了预校准。验证标准样品。一个启动套件，用于制备 100 个液体样品杯进行分析。监控样品，使校准保持最新状态。