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Han, Yu Long,Wang, Wenqi,Hu, Jie,Huang, Guoyou,Wang, Shuqi,Lee, Won Gu,Lu, Tian Jian,Xu, Feng Royal Society of Chemistry 2013 Lab on a chip Vol.13 No.24
<P>We presented a benchtop technique that can fabricate reconfigurable, three-dimensional (3D) microfluidic devices made from a soft paper-polymer composite. This fabrication approach can produce microchannels at a minimal width of 100 μm and can be used to prototype 3D microfluidic devices by simple bending and stretching. The entire fabrication process can be finished in 2 hours on a laboratory bench without the need for special equipment involved in lithography. Various functional microfluidic devices (e.g., droplet generator and reconfigurable electronic circuit) were prepared using this paper-polymer hybrid microfluidic system. The developed method can be applied in a wide range of standard applications and emerging technologies such as liquid-phase electronics.</P>
Emerging 2D material-based nanocarrier for cancer therapy beyond graphene
Wang, Yingwei,Qiu, Meng,Won, Miae,Jung, Eugeine,Fan, Taojian,Xie, Ni,Chi, Sung-Gil,Zhang, Han,Kim, Jong Seung Elsevier 2019 Coordination Chemistry Reviews Vol.400 No.-
<P><B>Abstract</B></P> <P>2D materials (e.g., graphene, graphene analogues), with unique physical and chemical properties, shows intriguing potential for the realization of versatile biomedical applications. Tremendous attention has been attracted on 2D material based nanocarriers, which play a crucial role in therapeutic drug, gene, and biomedical agent delivery for cancer theranostics. This review provides an up-to-date review on the development of nanocarriers based on 2D materials beyond graphene, including basic and emerging synthesis methods, the catalog of 2D material-based nanocarriers, biosafety, surface functional engineering, the realization of stimuli-responsive controllable release and biomedical applications. Among the properties and performance to be summarized, there is particular focus on nanocarriers loading capability, biosafety, and therapy efficiency and so on. Finally, by addressing major issues and challenges, some prospects for future directions in this area are provided.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Highlight the emerging 2D material based nanocarriers for biomedical applications. </LI> <LI> Summarized surface engineering strategy used in nanocarriers. </LI> <LI> Overview the biomedical application of 2D material nanocarriers. </LI> <LI> Give a guide to design stimuli-responsive controllable drug release strategy. </LI> <LI> Proposed insightful prospects for the future development of 2D material based nanocarriers application. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Wang, Xiao,Park, Soo-Young,Yoon, Kwan-Han,Lyoo, Won-Seok,Min, Byung-Gil The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.4
Poly(vinyl alcohol) (PVA)/multi-walled carbon nanotube (MWNT) composite films were prepared by casting a DMSO solution of PVA and MWNTs, whereby the MWNTs were dispersed by sonication. A significant improvement in the mechanical properties of the PVA drawn films was achieved by the addition of a small amount of MWNTs. The initial modulus and the tensile strength of the PVA drawn film increased by 30 % and 45 %, respectively, with the addition of 1 wt% MWNTs, which are close to those calculated from the rule of mixtures, and were strongly dependent upon the orientation of the PVA matrix. The mechanical properties, however, were not improved with a further increase in the MWNT content. The orientation of MWNTs in the composite was not well developed compared to that of the PVA matrix. This result suggests that the improvement of the molecular orientation of the PVA matrix plays a major role in the increase of the mechanical propeties of the drawn PVA/MWNT composite films.
Addressing the Side Effects of Contemporary Antidepressant Drugs: A Comprehensive Review
Wang, Sheng-Min,Han, Changsu,Bahk, Won-Myoung,Lee, Soo-Jung,Patkar, Ashwin A.,Masand, Prakash S.,Pae, Chi-Un Chonnam National University Medical School 2018 CMJ Vol.54 No.2
<P>Randomized trials have shown that selective serotonin reuptake inhibitors (SSRIs) and serotonin-norepinephrine reuptake inhibitors (SNRIs) have better safety profiles than classical tricyclic antidepressants (TCAs). However, an increasing number of studies, including meta-analyses, naturalistic studies, and longer-term studies suggested that SSRIs and SNRIs are no less safe than TCAs. We focused on comparing the common side effects of TCAs with those of newer generation antidepressants including SSRIs, SNRIs, mirtazapine, and bupropion. The main purpose was to investigate safety profile differences among drug classes rather than the individual antidepressants, so studies containing comparison data on drug groups were prioritized. In terms of safety after overdose, the common belief on newer generation antidepressants having fewer side effects than TCAs appears to be true. TCAs were also associated with higher drop-out rates, lower tolerability, and higher cardiac side-effects. However, evidence regarding side effects including dry mouth, gastrointestinal side effects, hepatotoxicity, seizure, and weight has been inconsistent, some studies demonstrated the superiority of SSRIs and SNRIs over TCAs, while others found the opposite. Some other side effects such as sexual dysfunction, bleeding, and hyponatremia were more prominent with either SSRIs or SNRIs.</P>
Multimodal Sensing with a Three-Dimensional Piezoresistive Structure
Won, Sang Min,Wang, Heling,Kim, Bong Hoon,Lee, KunHyuck,Jang, Hokyung,Kwon, Kyeongha,Han, Mengdi,Crawford, Kaitlyn E.,Li, Haibo,Lee, Yechan,Yuan, Xuebo,Kim, Sung Bong,Oh, Yong Suk,Jang, Woo Jin,Lee, J American Chemical Society 2019 ACS NANO Vol.13 No.10
<P>Sensors that reproduce the complex characteristics of cutaneous receptors in the skin have important potential in the context of artificial systems for controlled interactions with the physical environment. Multimodal responses with high sensitivity and wide dynamic range are essential for many such applications. This report introduces a simple, three-dimensional type of microelectromechanical sensor that incorporates monocrystalline silicon nanomembranes as piezoresistive elements in a configuration that enables separate, simultaneous measurements of multiple mechanical stimuli, such as normal force, shear force, and bending, along with temperature. The technology provides high sensitivity measurements with millisecond response times, as supported by quantitative simulations. The fabrication and assembly processes allow scalable production of interconnected arrays of such devices with capabilities in spatiotemporal mapping. Integration with wireless data recording and transmission electronics allows operation with standard consumer devices.</P> [FIG OMISSION]</BR>
Han, Ji Yeon,Choi, Jung Won,Wang, Kyu-Chang,Phi, Ji Hoon,Lee, Ji Yeoun,Chae, Jong-Hee,Park, Sung-Hye,Cheon, Jung-Eun,Kim, Seung-Ki KOREAN ACADEMY OF MEDICAL SCIENCE 2017 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.32 No.11
<P>Radiotherapy is one of the standard treatments for medulloblastoma. However, therapeutic central nervous system irradiation in children may carry delayed side effects, such as radiation-induced tumor and vasculopathy. Here, we report the first case of coexisting meningioma and moyamoya syndrome, presenting 10 years after radiotherapy for medulloblastoma. A 13-year-old boy presented with an enhancing mass at the cerebral falx on magnetic resonance imaging (MRI) after surgery, radiotherapy (30.6 Gy craniospinal axis, 19.8 Gy posterior fossa) and chemotherapy against medulloblastoma 10 years ago, previously. The second tumor was meningioma. On postoperative day 5, he complained of right-sided motor weakness, motor dysphasia, dysarthria, and dysphagia. MRI revealed acute cerebral infarction in the left frontal lobe and both basal ganglia. MR and cerebral angiography confirmed underlying moyamoya syndrome. Four months after the meningioma surgery, the patient presented with headaches, dysarthria, and dizziness. Indirect bypass surgery was performed. He has been free from headaches since one month after the surgery. For patients who received radiotherapy for medulloblastoma at a young age, clinicians should consider the possibility of the coexistence of several complications. Careful follow up for development of secondary tumor and delayed vasculopathy is required.</P>