2017/09/14 10:06
阅读:156
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产品配置单:
科捷全自动间歇泵进样双道原子荧光光谱仪
型号: AFS1101升级版
产地: 江苏
品牌: 南京科捷
¥5万 - 10万
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野猪是一种优质的野味肉畜,肉野味浓郁,肉质鲜美,营养丰富,有强体、滋补作用。野猪肉蛋白质含量高,主要以粗蛋白为主,热量高,脂肪含量低。特别是野猪肉以瘦肉为主,胆固醇含量比家猪低29%,人体所需的亚油酸含量高于家猪2.5倍,并含有多种微量元素和氨基酸,符合现代食品营养的需要,是优质的保健肉、美容肉。
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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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