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- 저자 : Aijuan He (검색결과 2 건)
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Overview of the Application of Flow Microreactors in the Synthesis of Silver Nanomaterials
Xiaoai He,Aijuan Lu,Jin Cheng,Junfang Chen,Qianhui Song,Wenfang Liu,Chuanpin Chen 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.11
The unique electrical, optical and biological properties of silver nanomaterials have attracted significant attention of many researchers. Since the size and shape of silver nanomaterials have significant effects on the properties of silver nanomaterials, extensive research has focused on synthesis and characterization of silver nanomaterials. However, almost all of the syntheses of silver nanomaterials were carried out in traditional batch reactors, which typically suffer from inhomogeneous mixing and corresponding spatial variations under reaction conditions, ultimately leading to poor quality of the final nanomaterials. Recently, the emerging microfluidic technology not only furnishes novel strategies for the synthesis of silver nanomaterials but also brings great opportunities and impetus to improve the quality and yield of silver nanomaterials due to enhanced mass and heat transfer. The current paper reviews recent achievements in the synthesis of silver nanomaterials in flow microreactors. Various strategies adopted for the synthesis of silver nanomaterials in microreactors are presented and compared, including synthesis in single-phase and multi-phase flow microreactors. In addition, the factors that affect the size and size distribution of silver nanomaterials in flow microreactors synthesis are also discussed briefly.
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Hengyun Sun,Yu Liu,Ting Jiang,Xia Liu,Aijuan He,Jie Li,Wenjie Zhang,Wei Liu,Yilin Cao,Guangdong Zhou 한국조직공학과 재생의학회 2014 조직공학과 재생의학 Vol.11 No.1
Due to lack of optimal inductive protocols, how to effectively improve chondrogenesis of adipose-derived stem cells (ASCs) is still a great challenge. Our previous studies demonstrated that the culture media derived from chondrocyte-scaffold constructs (conditional media) contained various soluble chondrogenic factors and were effective for directing chondrogenic differentiation of bone marrow stem cells. Nevertheless, it remains unclear whether the conditional media can induce ASCs towards chondrogenic differentiation, especially for three-dimensional (3D) cartilage formation in a preshaped scaffold. In this study, it demonstrated that the conditional media derived from chondrocyte-scaffold constructs could promote ASCs to differentiate into chondrocyte-like cells, with similar expression of type II collagen to those induced by chondrogenic growth factors. Moreover, the expression level of chondrocyte-specific genes, such as SOX9, type II collagen, and COMP, was even higher in conditional medium group (CM) than that in optimized chondrogenic growth factor group (GF), indicating that the conditional media can serve as an effective inducer for chondrogenic differentiation of ASCs. Most importantly, the conditional media could also induce ASC-scaffold constructs to form 3D cartilage-like tissue with typical lacunae structures and positive expression of cartilage specific matrices, even higher contents of GAG and type II collagen were achieved in CM group compared to GF group. The current study establishes a simple, but stable, efficient, and economical method for directing 3D cartilage formation of ASCs, a strategy that may be more closely applicable for repairing cartilage defects.
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