2014/12/10 14:31
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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
肿瘤特异性抗体功能分析
肿瘤特异性抗体功能分析包含很多方面: T细胞功能活化及增殖、细胞因子分析、抗体依赖的细胞介导的细胞毒性作用(antibody-dependent cell-mediated cytotoxicity; ADCC)、抗体介导的补体依赖的细胞毒性(complement dependent cytotoxicity; CDC)、巨噬细胞抗体依赖性的细胞吞噬作用(Antibody-Dependent Cellular Phagocytosis; ADCP)等。
制药/生物制药
2021/04/28
宝德仪器助力新版《生活饮用水卫生标准》(GB5749-2022)
2022年3月15日,国家市场监督管理总局(国家标准化管理委员会)批准了新版《生活饮用水卫生标准》(GB5749-2022),该标准将于2023年4月1日起正式施行,全部代替现行的GB5749-2006。在新版国家标准中水质指标由原来的106项调整为97项,包括常规指标43项和扩展指标54项;水质参考指标由原来的28项调整为55项。北京宝德仪器有限公司现有产品可帮助用户解决14项常规指标、4项扩展指标和4项水质参考指标的测定。
环保
2022/03/30
应用方案 | 原子荧光光谱仪测定蚯蚓中砷含量
砷(As)在自然中广泛存在,砷的长期摄入具有一定的健康风险,其毒性作用主要包括生殖发育毒性、神经毒性、免疫毒性,还可诱发人类发生多种癌症,食品中砷的存在及其对人体健康的风险评估仍是今后需要进一步关注和研究的方向。
农/林/牧/渔
2023/02/24