Metabolite interactions in prostatic fluid mimics assessed by 1H NMR

Magnetic Resonance Materials in Physics, Biology and Medicine - Molecular interactions in prostatic fluid are of biological interest and may affect MRI and MRS of the prostate. We investigated the...     

高收缩改性涤腈纱线

介绍了高收缩改性涤腈纱线的原理、纺纱工艺和成纱性能。     

超疏水泡沫镍材料的制备及其油水分离性能∗

针对目前油水分离方法分离效率低、重复利用率低、二次污染环境等问题,开展了疏水三维多孔油水分离材料的研究。 以泡沫镍为基底材料,通过水热法构造多级微纳复合结构表面和氟硅烷疏水化处理得到超疏水泡沫镍。 利用扫描电子显微镜、能谱仪、X-射线衍射仪和全反射傅里叶变换红外光谱仪、接触角测量仪表征其表面形貌、成分和疏水性能,测试改性泡沫镍的油水分离性能和重复利用率。 结果表明:在泡沫镍表面成功制备出“鸟巢状”垂直排列的 Ni(OH)₂纳米片阵列,并形成局部“团簇状”凸起,协同泡沫镍本身微米级孔骨架构成多级微纳米粗糙结构,具有低表面能的氟硅烷成功组装在多级微纳结构表面,实现了优异的超疏水性能。 改性泡沫镍可实现对甲苯、氯仿、正己烷与水的混合物吸附分离,且具有良好的循环使用性。 制备的超疏水泡沫镍可在磁场控制下实现对油水混合物的分离,是一种高效、智能的油水分离三维多孔材料。     

激光、药物联合治疗瘢痕疙瘩49例

激光、药物联合治疗瘢痕疙瘩４９例临床全部一次治愈，无一例复发，治愈率为１００％，既解决病人痛苦、缩短疗程，又达到美容效果。     

Spectral properties of system I-deficient mutants of Chlamydomonas reinhardi. Possible occurrence of uphill energy transfer

The effects of end-inspiratory pause (EIP) on gas exchange were measured in 10 adult patients with acute respiratory insufficiency while maintained on mechanical ventilation. Four inspiratory patterns were studied with a constant tidal volume (10 to 15 ml/kg body weight), respiratory rate (9 to 12 breaths/min), FIO2 (0.5) and end-expiratory pressure. Inspiratory flow rate (V insp) and EIP time were varied to produce a control pattern (V insp = 60 L/min, EIP = 0), 2 EIP patterns of 0.6 and 1.2 seconds with a similar V insp and a "slow" flow pattern (V insp = 30 L/min) without EIP. The control pattern was applied before and after each study period. Arterial oxygenation was unchanged with both EIP and "slow" flow patterns when compared to control. Dead-space ventilation (VD/VT) and Paco2 were significantly decreased (p less than 0.01) as EIP was increased from 0 to 1.2 seconds, but remained unchanged with slow inspiratory flow. Thus, EIP improved the efficiency of ventilation with no apparent improvement in oxygenation in patients with acute respiratory insufficiency.