Arnsten said that the aging prefrontal cortex appears to accumulate excessive levels of a signaling molecule called cAMP, which can open ion channels and weaken prefrontal neuronal firing.
Arnsten认为，衰老的前额叶皮层中积累了过多的信号化学分子，称为环腺苷酸(Camp)，它能打开离子通道，从而削弱前额叶皮层中神经元放电的频率。
Fortunately for the tea drinkers of Britain, Prussian blue is a complex molecule, so it is almost impossible to release the cyanide ion from it and the poison passes harmlessly through the body.
但那些英国的饮茶人士还算走运，普鲁士蓝是一种化合物分子，它在人体中几乎没可能释放出氰根离子。所以这种物质最终将安全无害的从人体中排出。
An ion channel is a molecule that allows the passage of electrically charged atoms of sodium, potassium, calcium and so on through the outer membrane of a cell.
离子通道是一种分子，它允许钠、钾、钙等离子经由它通过细胞外膜。
So, let's try another example here, and let's try a case now where instead of dealing with a neutral molecule we have an ion, so we have c n minus.
那么，让我们来试一下另外一个例子，这次不是一个中性原子,而是一个离子，氰离子。
A crystal defect caused by the absence of an atom, an ion, or a molecule in a crystal lattice.
晶格空位在晶格里由于缺少一个原子、一个离子或一个分子造成晶格空位。
The ion velocity distribution of Maxwell molecule collision model can be obtained using the 16-moment approximation.
进而得到了麦克斯韦分子碰撞模型下离子分布函数的16矩近似。
This paper is to study progress on molecule recognition of ion, macromolecule, chiral molecule and applications in some field by the use of supramolecular porphyrins.
综述了超分子卟啉化合物对离子、大分子、手性分子的识别的研究进展及其在一些领域的应用。
This article is devoted to the measurement of the appearance potential of the Same molecule ion in two processes and of the dissociation energy of molecules by mass Spectrometry.
本文测定设计的两个过程中同一分子离子的表观电势，用质谱法测定出分子的离解能。
Thirdly, the binding energy of a crown-ether molecule complexing with an alkali-metal ion is estimated.
最后估算了冠醚分子络合碱金属离子的结合能。
The obtained ion spectra of NO molecule and atom oxygen are very useful experimental information for research of the NO2 photodissociation and NO molecule atom oxygen ionization dynamics.
所得到的NO分子与氧原子的离子谱及它们的离子信号对no2分子光解及NO分子与氧原子的电离动力学研究提供了有益的实验信息。
During the ion transportation and separation process, the elevated energy level of ions prevents them from clustering with neutral molecule inside the spectrometer.
在离子运输和分离的过程中，提升后的离子能量水平防止了离子与谱仪内的中性分子进行团簇。
Unlike a molecule or complex ion, which is a finite (often small) assembly of atoms, a solid has no fixed size but can add atoms indefinitely.
不像原子数有限(通常非常小)的分子和络离子，固体没有固定的形状并且可无限制的添加原子。
now we're dealing with a lot of different atoms in the molecule, much more complicated than the initial case of the cyanide ion where we only had two.
现在我们要面对的分子中有很多不同的原子，比我们一开始只有两个，原子的氰离子复杂多了。
The experiment shows that the parent molecule first occurs -cleavage and absorbs (2 + 2) photons to get to ion state.
实验结果显示，母体分子首先发生断裂并且吸收(2 + 2)个光子到达离子态。
Through microscopic analysis of XRD and infrared spectra, when calcium ion is replaced by lithium ion, the lattice spacing of bentonite and the water molecule number in the structure decrease.
经xrd和红外光谱的微观分析，当锂离子置换钙离子后，膨润土的晶格间距减小，结构中的水分子减少。
The electron soon attaches itself to another molecule, making a negatively charged ion.
电子很快被另一个原子所吸附，使之成为负离子。
XRD analysis showed that better intercalation effect could be obtained by adopting ammonium ion with longer molecule length, solvent method and high density polyethylene.
XRD测试显示，采用长链季铵盐、溶液法和高密度聚乙烯可获得较好的插层效果。
As one of the fluorescent molecules with high quantum yield, rhodamine was often chosen as the mother molecule in the synthesis of metal ion fluorescence chemosensor.
作为一种高量子产率的荧光分子，罗丹明常常被选作荧光母体用于金属离子荧光探针的设计合成。
PVD coatings involve atom-by-atom, molecule-by-molecule, or ion deposition of various materials on solid substrates in vacuum systems.
物理蒸发沉淀涂层涉及到在真空装置内各种各样的材料原子紧靠原子、分子紧靠分子或离子沉淀于固态基体上。
Furthermore, evidence suggests that combustion is sensitive to and can be enhanced by ion-molecule chemistry.
此外，有证据表明，燃烧是敏感的，可以通过离子增强化学分子。
Ion-molecule reaction can be used for the analysis of trace gases.
离子-分子反应可用于痕量气体分析研究。
Ion-molecule reaction can be used for the analysis of trace gases.
离子-分子反应可用于痕量气体分析研究。
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