36655-86-4Relevant articles and documents
Colorimetric detection of glucose by a hybrid nanomaterial based on amplified peroxidase-like activity of ferrosoferric oxide modified with gold-platinum heterodimer
Bai, Zhenyu,Feng, Xiaoyang,Fu, Hao,Hu, Xueping,Li, Ping,Song, Xingliang
, p. 239 - 249 (2021/12/30)
The colorimetric detection of glucose using hybrid nanostructures is a rapidly growing research hotspot. In this work, we established a simple route for the synthesis of a class of multi-metal hybrid nanostructure materials and investigated their peroxidase-like performance for the colorimetric detection of glucose. The hybrid nanomaterial (Fe3O4@Au-Pt) incorporated ferrosoferric oxide nanoparticles (Fe3O4NPs) and heterodimers composed of gold (Au) and platinum (Pt), which presents excellent morphology and structure. On the basis of our research, we constructed an easy and sensitive colorimetric sensor for the detection of glucose and hydrogen peroxide (H2O2), and the results indicated that the Fe3O4@Au-Pt hybrid nanomaterial possessed preferable peroxidase-like activity in comparison with other nanozyme materials and showing prominent selectivity for glucose detection. For H2O2, the sensor has a linear range of 0.05-120 μM and a relatively low limit of detection (LOD) of 0.018 μM. For glucose, the linear range is 0.05-140 μM with an LOD of 0.025 μM. It is envisioned that these hydrophilic hybrid nanostructures will be widely applied in sensing target analytes, biomedical diagnosis, and therapeutic applications in the future by taking advantage of their specific structure and excellent catalytic performance.
Chain conformations and steady-shear viscosity properties of pectic polysaccharides from apple and tomato
Hu, Shihao,Nie, Shaoping,Wang, Junqiao,Wang, Qiang,Xu, Xiaojuan
, (2022/04/03)
In this study, apple pectin (AP) and tomato pectin (TP) were demonstrated to be a high-ester (74.8%) polysaccharide with the weight-average molecular weight (Mw) of ～ 243 kDa and a low-ester (45.9%) polysaccharide with the Mw of ～ 19 kDa, respectively. The semi-rigid chain conformations of pectic polysaccharides in NaNO3 aqueous solution were deduced according to the Smidsr?d “B values” of AP (0.025) and TP (0.029), while AP and TP exhibited higher stiffness in water due to the electric repulsion of carboxyl groups, which was visually observed by AFM images. Under steady shear, the shear-thickening behaviors of AP and TP in NaNO3 aqueous solutions were observed in the shear rate range of ?1, which were attributed to the disruption of the ordered arrangement induced by semi-rigid pectin chains into randomly entangled structure by weak shear force. AP exhibited stronger shear-thickening behavior due to the formation of more entanglements resulted from the higher Mw and longer side chains highly branched at rhamngalacturonan region. This study provides the scientific basis for the construction of the relationship of steady-shear property with chain conformation and molecular weight of pectin.
Triterpenoid saponins from the leaves and stems of Pericampylus glaucus and their insulin mimetic activities
Lee, Hee-Ju,Cho, Hyo-Moon,Park, Eun-Jin,Lee, Ba-Wool,Nghiem, Duc-Trong,Pham, Ha-Thanh-Tung,Pan, Cheol-Ho,Oh, Won-Keun
, (2021/11/01)
During an attempt to discover insulin mimetics, thirteen new triterpenoid saponins (1–13), including three phytolaccagenic acids (1, 2, and 12) and ten serjanic acids (3–11 and 13), as aglycones were isolated from a 70% ethanol extract of leaves and stems from Pericampylus glaucus. The chemical structures of compounds 1–13 were determined through spectroscopic data analysis, including NMR, IR, and HRESIMS. All isolated compounds (1–13) were evaluated using 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl)amino]-D-glucose (2-NBDG) as a fluorescent-tagged glucose probe to determine their stimulatory effects on glucose uptake in differentiated 3 T3-L1 adipocyte cells. Consequently, four compounds (4, 7, 11, and 12) exhibited stimulatory effects on glucose uptake.
