2019/04/29 10:03
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GPC-IR高温凝胶渗透色谱仪
型号: GPC-IR高温凝胶色谱仪
产地: 西班牙
品牌: Polymer Char
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聚合物材料全自动特性粘度分析仪
型号: IVA
产地: 西班牙
品牌: Polymer Char
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高熔体强度聚烯烃材料
分子量和长短支链及其分布的表征
影响聚烯烃材料熔体强度的因素很多,其中分子量及其分布,长支链及其分布,短支链及其分布的数据对于判断熔体强度差异化原因至关重要,因此如何全面快速得到这些数据,对材料研发和加工应用人员意义重大。我公司通过采用配备IR5检测器、黏度检测器和组分检测器的高温凝胶色谱仪,可以得到这些数据,为研发人员提供了可靠的科学依据。
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台阶仪在三维形貌表征领域的应用
Stylus-based surface profiling is a standard technique for accurate, repeatable surface shape, topography and step height measurement in applications ranging from semiconductor R&D to solar cell QC.
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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
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从中药中提取分离化合物,第一步需要将中药材中的成分用有机溶剂提取出来,包括常规的有机溶剂浸泡,超声提取,超临界提取和加速溶剂萃取(Aseeker-600型加速溶剂萃取仪)等,得到一份总提物。
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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。
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