补充维生素吃出好皮肤

规律均衡的饮食生活，可助长美丽健康的皮肤。营养素有动物性和植物性的蛋白质，以及维生素B、E、C等。尤其是被妙喻为“美容维生素”的维生素B，更可应用在皮肤病的治疗上。这些维生素B群、C、E可使毛细血管畅通，并不断供给皮肤所需要的营养，以促进健康和柔嫩肌肤的成长。     

电刺激小脑顶核促脑缺血后血管内皮生长因子表达的意义

探讨电刺激小脑顶核(FNS)对局部脑缺血后血管内皮生长因子(VEGF)表达和毛细血管新生的影响．以线栓法制成大鼠右侧大脑中动脉梗塞模型(MCAO)，大鼠随机分为假手术对照组、MCAO组、电刺激小脑顶(MCAO FNS)干预组，以免疫组织化学法检测VEGF、内皮细胞阳性表达及毛细血管记数，大脑中动脉梗塞后，缺血区神经元变性、坏死，VEGF、内皮细胞在半暗带有少量表达，毛细血管数较对照组增加，经电刺激小脑顶核干预后，VEGF、内皮细胞大量表达，毛细血管数目明显增加，有统计学差异．电刺激小脑顶核可通过促VEGF表达、内皮细胞增殖，从而促进毛细血管新生。     

Role of Tip60 tumor suppressor in DNA repair pathway

To prevent the damage caused by DNA strand breaks, eukaryotic cells have evolved a series of highly conserved DNA repair mechanisms. The ubiquitously expressed acetyltransferase, Tip60, plays a central role in ATM (ataxia-telangiectasia mutated) activation which is involved in DNA repair. Recent work uncovered a new mechanism of ATM activation mediated by Tip60 and demonstrated that histone methylation, specifically, trimethylation of histone H3, is a key factor in the process. Here, we review the current understanding of how Tip60 is activated and how it activates ATM in response to DNA damage.     

午睡的学问

<正>午饭后,为了消化食物、吸收营养,人体血液较多地流入了胃肠,大脑内的血流量相对减少。特别是在温度高的中午,身体内为了散热,皮肤毛细血管扩张,血流量增多,大脑更显"贫血状态",故此时人便感到精神不振,昏昏欲睡。加上昼长夜短,人们往往睡眠不足,经过半天的工作、学习,人们也常会感觉疲劳。如果有条件,这时午睡一会儿,对消除人体尤其是大脑的     

8～10岁儿童甲皱微循环观察

报道了３５０例８～１０岁正常儿童甲皱微循环的观察结果。对观察对象甲皱毛细血管的形态、管袢数目、长度、动脉端与静脉端直径、血流速度与血流状态，进行了描述、测量和记录，并分析了正常儿童甲皱微循环的特点。     

中华大蟾蜍肺毛细血管的扫描电镜观察

用扫描电镜观察了ＡＢＳ丁酮溶液灌注的中华大蟾蜍肺毛细胞管构筑情况，其肺壁被内面的施工网状隔膜分隔成许多小室－肺泡；在网状隔膜，肺泡壁上均有丰富的毛细血管，且相互吻合成单层密集网；肺泡毛细血管网眼多，由五边形的毛细管环构成，毛细血管直径９．５３－１６．７３μｍ，网眼孔径９１．７－２５．１８μｍ；在毛细血管铸型上有明显的内皮细胞核的压迹。     

打印血管

人造器官时代离我们越来越近——一个组织工程学小组成功地用细胞取代油墨,使用"打印机"创造了有功能的血管和心脏组织,有关论文本月发表在《组织工程学》杂志上。这一工作是首次用打印机生产出有功能的三维生命组织,是实现打印整个器官目标的里程碑。哥伦比亚州密苏里大学的伽柏·福加克斯(Gabor Forgacs)和同事们打印了各种组织结构,包括血管和心脏组织薄片。心脏和血管内皮细胞被打印出来后,经过70个小时,细胞与组织融合在一起,90     

他们选择了“微循环”

<正>一、微循环的概念、范畴微循环系统是人体血液循环系统中最基层的结构和功能单位,包括微动脉与微静脉之间毛细血管中的血液循环,微动脉、微静脉、毛细淋巴管和组织管道内的体液循环。各器官组织被分枝的     

Compound-fluidic electrospray: An efficient method for the fabrication of microcapsules with multicompartment structure

Microcapsules with multiple compartments are of significant importance in many applications such as smart drug delivery, microreactor, complicated sensor, and so on. Here we report a novel compound-fluidic electrospray method that could fabricate multicompartment microcapsules in a single step. The as-prepared microcapsules have multiple compartments inside. The compartments are separated from each other by inner walls made from shell materials, and different content can be independently loaded in each of them without any contact. We assemble a hierarchical compound nozzle by inserting certain numbers of metallic inner capillaries separately into a blunt metal needle. The particular configuration of the compound nozzle induces a completely and independently envelope of core fluids by shell fluid, as a result of which mulicomponent microcapsules with multicompartment structure can be obtained. And also, the number of inner compartments and the corresponding encapsulated components can be controlled by rationally designing the configuration of the compound nozzle. This general method can be readily extended to many other functional materials, especially for the effective encapsulation of active ingredients, such as sensitive and reactive materials.