Researchers have devised clever new techniques to mimic the chemical marks on tightly wound DNA-protein complexes that silence gene expression. 研究人员已经发明了精敏的新技术,来模拟化学药品,在紧密结合的沉默基因表达的DNA-蛋白复合体上做标记。
These steps will help you think about what makes communities tick and how to keep yours tightly wound. 以下这些步骤将帮助您考虑保持社区健康的因素。
For a steady current-carrying tightly wound thick-wall solenoid with a finite length, the expression of vector potential is derived by using the method of cylindrical function expansion. 对于通以恒定电流的有限长厚壁螺线管,用柱函数展开法推导出矢势的表达式,再根据磁感应强度与矢势的关系式得出磁场的积分形式表达式。
Little did I realize, all that stiff dough needed was a short time-out in the refrigerator. Kneading and rolling develop the gluten in the flour and cause the crust to recoil rather than enlarge; chilling relaxes the tightly wound gluten. 我没有意识到,那硬邦邦的面团所需要的只是在冰箱里搁置片刻。揉捏会让面粉产生面筋,导致饼皮回弹而不是延展;冷却会让结构紧密的面筋松弛。