2016/03/30 16:44
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生活中,玻璃器皿被广泛应用,比如:食品、药品等给个行业,所以我们主要介绍一下玻璃器皿内应力的检验方法。一般塑胶产品在射出成品定型前,如因调整不当造成射胶压力过高,射入模内虽经过浇口,浇道,成品之间的阻力以及成品渐冷,压力之降低,使产品内部的分子分布不均匀而存在成品内部之压力称为"内应力"
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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
安捷伦 Seahorse XF 分析试剂盒与试剂
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。
医疗/卫生
2019/07/18
方向效应:解决食品中金属检测的挑战难题
金属检测技术的局限性之一是对于像电线和大头针这样相对比较小的、长条形金属异物就很难检测出来。这些类型的污染物通常表现出“方向效应”,即金属探测器所检测到的信号很大程度上取决于污染物与探测孔的方向关系。方向效应给金属检测系统带来了挑战——这一挑战乍一看并不是那么严重,但事实上它可能会给消费者的安全以及品牌声誉带来严重的影响和危害。
食品/农产品
2021/01/19
称量仪器的校准
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。
其他
2022/04/23