部分还原氧化石墨烯的制备、 表征及对人宫颈癌HeLa细胞的体外杀伤作用

以氧化石墨烯(GO)为原料, 利用温和方法制备了3种不同还原程度的部分还原氧化石墨烯pRGO₁, pRGO₂和pRGO₃(pRGO_1—3)； 利用傅里叶变换红外光谱(FTIR)、 拉曼光谱(Raman)、 X 射线光电子能谱(XPS)、 紫外-可见光谱(UV-Vis)、 透射电子显微镜(TEM)和 EDS能谱对其结构和形貌进行了表征. 细胞实验结果表明, 无激光照射下pRGO_1—3本身的细胞毒性较低; 近红外(NIR)激光照射下pRGO_1—3通过光热和光毒性双重作用杀伤肿瘤细胞. 实验结果显示了pRGO 在肿瘤光热疗法和光动力疗法领域的应用潜力.     

Flower-like titanium dioxide as novel co-reaction accelerator for ultrasensitive “off–on” electrochemiluminescence aptasensor construction based on 2D g-C3N4 layer for thrombin detection

Journal of Solid State Electrochemistry - An ultrasensitive “signal-off–on” electrochemiluminescence (ECL) biosensor is constructed based on f1-TiO2/g-C3N4/PDA for thrombin...     

Multifunctional fibrous wound dressings for refractory wound healing

Refractory wounds have always been an important issue to healthcare systems, whose healing process is always delayed by multiple factors, including bacterial infections, chronic inflammation, and excessive exudates, etc. Employing multifunctional wound dressings is recognized as an effective strategy to deal with refractory wounds, which has yielded promising outcomes in recent years. Among these advanced wound dressings, fibrous dressings have gained growing attention due to their unique merits. Such wound dressings have demonstrated great potential in delivering theranostic agents, such as antibacterial agents, anti-inflammatory drugs, growth factors, and diagnostic probes, etc., for the purposes of accelerating wound healing. This paper reviews the development of multifunctional fibrous dressings and their applications in treating refractory wounds. The construction approaches of novel fibrous dressing with capabilities of antibacterial, anti-inflammation, exudate management and diagnosis were also introduced. Furthermore, the existing problems and challenges are also discussed briefly.     

Excellent UV-absorbing cotton fabric with high durability and hydrophobicity based on surface-initiated ATRP of polymerizable organic UV-absorber

Cellulose - Ultraviolet (UV) protective cotton fabric is a convenient and reliable way to protect human body from sunlight. Herein, a polymerizable UV-absorber,...     

具有外部干扰的耦合时滞神经网络固定时间二分同步

针对结构平衡图与结构非平衡图的网络拓扑,考虑了一类具有外部干扰的耦合时滞神经网络模型,分别设计了其固定时间同步控制协议.借助固定时间稳定性理论与不等式技巧,获得了耦合网络在固定时间内达到同步的充分性判据,给出了具体的收敛时间上界,并验证了固定时间同步网络的鲁棒性与抗干扰性.为了扩大网络模型的适用性,考虑的神经网络激活函数为非连续的函数,可借助微分包含与集值李导数理论解释非连续微分方程的动力学行为.最后,分别在结构平衡图和非平衡图下对耦合神经网络的固定时间二分同步进行了数值仿真,验证了控制算法的有效性及理论结果的正确性.     

Nonlinear vibration response of a complex aeroengine under the rubbing fault

Nonlinear Dynamics - Rolling bearing and squeeze film damper will introduce structural nonlinearity into the dynamic model of aeroengine. Rubbing will occur due to the clearance reduction design of...     

EcoLens: visual analysis of ecological regions in urban contexts using traffic data

Journal of Visualization - The increasing availability of spatiotemporal data provides unprecedented opportunities for understanding the structure of an urban area in terms of people’s...     

Dynamic mechanism of epileptic seizures generation and propagation after ischemic stroke

Nonlinear Dynamics - Epilepsy is the second largest neurological disease which seriously threatens human life and health. The one important reason of inducing epileptic seizures is ischemic stroke...     

大学生童年受忽视经历对自尊的影响:应对方式的中介作用

为研究大学生在童年时受到忽视与自尊水平、应对方式之间的关系,采用方便抽样法,向430名学生发放童年受忽视量表、简易应对方式量表和自尊量表,使用统计软件SPSS17.0进行数据整理与分析,结果表明,大学生在童年时受到的忽视与自尊、处理应对的积极方式是负相关关系(r=-0.164,r=-0.246,P<0.01),忽视与消极应对方式呈正相关关系(r=0.152,P<0.01);自尊与大学生采用积极的应对方式呈正相关关系(r=0.398,P<0.01),与采用消极的应对方式呈负相关关系(r=-0.217,P<0.01);不同的应对方式在面临忽视与自尊之间起着协调作用,积极应对方式的协调效果有29.4%,而消极应对方式的协调效果则只有12.6%,差距十分明显。因此,大学生在童年时受到忽视与自尊、不同的应对方式会收到完全不同的协调效果。