2014/09/30 09:39
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YSI防玷污的10个技巧
YSI 防玷污的10点技巧 随着电子技术的进步、电源管理的改进和电池寿命的延长,生物玷污成为目前决定监测仪器投放周期长度的决定因素,特别是应用于长期、连续监测。应用一些防玷污技术可以延长仪器的维护间隔,能够减少野外的仪器维护的次数,并提高水质监测数据精度。 防玷污技巧的详细内容请参考文章《YSI 防玷污的10点技巧》
环保
2014/03/04
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
连华科技 医疗污水检测方案
医疗污水包含了多种细菌、重金属、有机溶剂及酸碱溶液等生化有毒有害物质。如上述物质直接排放,将会对自然生态及人类生活环境造成危害。我国对医疗污水有清晰的排放标准。连华科技对于《医疗机构水污染物排放标准GB18466-2005》中所涉及的参数,多款便携及实验室仪器及耗材可满足检测需求
环保
2020/02/14
病原微生物检测整体解决方案
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。
生物产业
2020/06/17