Since a carbon nucleus is six times more positively charged than a hydrogen nucleus , the cno cycle can only operate at the higher temperature and density provided by the more massive stars 但因碳原子核带的电荷是氢原子核的六倍碳氮氧循环需要只有质量大星体所能提供的较高温度和压力才能维持。
This is attributed to the stabilization of the excited state of intermediate of luminol by the interaction with the positively charged pee modified layer 荷正电的聚乙烯亚胺修饰分子与鲁米诺激发态3 -氨基邻苯二甲酸阴离子间静电相互作用而导致的激发态稳定性增加;对鲁米诺分子的电化学发光的增强起着关键作用。
In addition , the interactions between dab molecules and silver particles in varied ph values were different , which is mainly due to the n atom in dimethylamino group positively charged 河南大学光学专业2001级硕士论文dab分子在不同ph值溶液中与银纳米颗粒相互作用有所区别，这是由于二甲胺基的n原子带上了正电荷。
The nucleus consists of uncharged neutrons and positively charged protons . negatively charged electrons travel around the nucleus in their orbits , similar to the way planets moving around the sun 细小的原子核内含不带电荷的中子及带正电荷的质子，而带负电荷的电子则沿轨道环绕原子核运行，情况就好像行星环绕太阳运行一样。
In this paper , a positively charged composite nanofiltration membrane was developed by using poly ( n , n - dirnethylaminoethyl methacrylate ) ( pdmaema ) as the active layer material and polysulfone ( psf ) macrofiltration membrane as the support layer 本文以聚甲基丙烯酸二甲氨基乙酯( pdmaema )为表层材料，以聚砜( psf )微孔滤膜为基膜，制备了荷正电复合纳滤膜。
And when a particular type of alginate is dissolved in water , then exposed to positively charged calcium ions , its molecules crosslink to form a hydrogel that is 98 percent water , with a gelatinous consistency and elastic properties similar to those of natural extracellular matrix 当某一特定类型的褐藻酸盐溶于水，遇到带正电的钙离子后，它的分子会连结形成含有98 %水的凝胶，其胶质密度和弹性都类似天然的细胞外间质。
There are a few basic elements to a mass spectrometer : an inlet to introduce the sample gas into the vacuum of the mass spectrometer , an ion source to convert the sample gas molecules into positively charged ions , a mass filter to separate the ions using magnetic or electric fields and a detector that quantifies the amounts of ions at different masses 质谱仪的几个基本组成部分：将样品引入质谱仪的进样系统，将气体分子转变为正离子的离子源，使用磁场或电场分离离子的质量分析器，对不同质量数离子定量的检测系统。
Pdmaema can be cross - linked by quaternization to develop a positively charged dense network structure . according this mechanism , pdmaema / psf positively charged nanofiltration membrane was developed by interfacial polymerization using psf plate macrofiltration membrane as support layer , pre - polymer of pdmaema water solution as coating solution , p - xylylene dichloride / heptane as cross - linking agent 根据这一机理，以psf平板微孔膜为基膜， pdmaema预聚物水溶液为涂层液，以对二氯苄正庚烷溶液为交联剂，采用界面聚合法制备了pdmaema psf荷正电复合纳滤膜。
In addition , chondroitin sulfate / chitosan composite films are self - assembled through electrostatic attraction on the positively charges mica substrate . the interaction and mechanism of forming the composite films were introduced . when the concentration of chitosan is 5 mg / ml and the concentration of chondroitin sulfate is 1 mg / ml , the composite films exhibited a good miscibility at a molecular scale . this kind of composite films is promising in the field of medical materials 另外，也研究了草酸钙在硫酸软骨素自组装膜上受控凝集结晶的现象，发现当硫酸软骨素的浓度为1 . 0mg ml时在云母表面形成的网状基底可以诱导过饱和的草酸钙溶液凝集结晶形成liesegang环，为深入研究尿结石中环结构的形成提供了一定的实验依据。
