The trick is designing the appropriate polymer adhesive that will retain a given drug molecule yet also allow it to diffuse , a delicate balancing act , notes sharon grosh of 3m drug delivery systems 3m公司药物递送系统部的格罗许指出， ?中要诀在于要能设计出适当的高分子黏胶，以使特定药物分子处于虽被吸附，却仍不失扩散能力的微妙平衡状态。
If we eat animals , we unconsciously step into their magnetic fields , which are characterized by a strong desire for life and apprehension about death . we get stuck , just as we do when we step on glue and our foot is glued to the spot and loses mobility 我们如果吃动物的话，就会无意中踩到它们那种贪生畏死的磁场里，然后被关在那里被黏在那里被卡住，就像踩到黏胶一样，我们的脚会被黏在那边不能动。
Performance for a piezoresistive transducer pressure sensor to thermal and pressure environments can be predicted by finite element method . a simplified 1 / 8 model , considering silicon dioxide and nitride process as well as stack anodic bonding and adhesive bonding processes , was developed . the fem results were found to be comparable to experimental data . case studies suggested that pyrex stack induces certain amount of non - linearity , while it isolates hard epoxy nonlinear effect . flexible epoxy bonding or soft adhesive bonding is preferred to the packaging process . the viscoelasticity and viscoplasticity of bonding material will result in hysteresis and drift errors to sensor output . however , soft adhesive s influence on sensor can be ignored under relative stable environments . more over , detailed design and process information will help to improve modeling application 热、压环境下压阻变换压力传感器的性能可以通过有限元方法预测.这里研究了简化的1 / 8模型,模型考虑了二氧化硅和氮化硅生成过程及堆阳极键合和胶粘结合过程.结果发现有限元预测结果和实验数据具有可比性.范例研究表明,硼硅堆导致产生一定的非线性,但它隔离了硬环氧树脂的非线性.在包装过程中最好使用柔性环氧黏合或软黏胶性结合.黏合材料的黏弹性和黏塑性将会导致传感器输出的滞后和漂移误差.然而,在相对稳定的环境下,软黏合剂对传感器的影响可以忽略.此外,详细的设计和过程信息有助于提高模型的适用性
