Provided herein is a nanoparticle comprising a metal core and a polymer shell coating the metal core useful as a magnetic resonance contrast agent.
本文提供了一种纳米颗粒,包括金属核心和包覆在金属核心上的聚合物外壳,可用作磁共振对比剂。
Magnetic nanoparticles for disease diagnostics
申请人:Nano and Advanced Materials Institute Limited
公开号:US10179179B2
公开(公告)日:2019-01-15
Provided herein is a nanoparticle comprising a metal core and a polymer shell coating the metal core useful as a magnetic resonance contrast agent.
本文提供了一种纳米粒子,它由金属芯和包裹金属芯的聚合物外壳组成,可用作磁共振造影剂。
Microbial transformation of curcumin by<i>Rhizopus chinensis</i>
作者:Xing Zhang、Min Ye、Rui Li、Jun Yin、De-An Guo
DOI:10.3109/10242422.2010.532870
日期:2010.12
Curcumin (1) is a potent antioxidant and antitumor natural product. In spite of its efficacy and safety, its clinical use is hindered mainly by poor water solubility and bioavailability. Structural modification to introduce hydrophilic functions is a promising approach to resolve this problem. In the present study we first found that curcumin could be efficiently converted into glucosides by filamentous fungi including Rhizopus chinensis IFFI 03043, Absidia coerulea AS 3.3389 and Cunninghamella elegans AS 3.1207. Curcumin 4'-O-beta-D-glucoside (2), together with hexahydrocurcumin (3), was isolated from a preparative-scale biotransformation with R. chinensis IFFI 03043 and characterized fully by NMR and MS. A time-course study revealed that curcumin could be efficiently converted into curcumin 4'-O-beta-D-glucoside within 8 h when administered at 0.05 mmol L-1 and the productivity was 57%. Additionally, the biotransformation products of curcumin by different fungal strains were analyzed by LC/MS. At least 15 metabolites were detected, and the predominant biotransformation reaction was glucosylation. This study provides a simple, efficient and less expensive approach for the preparation of curcumin glucosides. The introduction of the glucosyl function might be able to enhance the bioavailability of curcumin.
JPH05255061A
申请人:——
公开号:JPH05255061A
公开(公告)日:1993-10-05
Gomes, Denise De C. F.; Alegrio, Leila Vilela; Freire de Lima, Marco Edilson, Arzneimittel-Forschung/Drug Research, 2002, vol. 52, # 2, p. 120 - 124
作者:Gomes, Denise De C. F.、Alegrio, Leila Vilela、Freire de Lima, Marco Edilson、Leon, Leonor L.、Araujo, Catarina A. C.