质量数

锶的放射性同位素（原子质量数为），存在于核爆炸的原子尘中，能象钙一样被吸收到骨中。

A radioactive isotope of strontium ( with the mass number 90 ) that is present in the fallout from nuclear explosions ; can be assimilated like calcium into bones .

最后系统地研究了Pb和Ni这两条同位素链的共振态性质，发现两条同位素链的单粒子共振态能量都随原子核质量数的增加而减小。

We have investigated in details the properties of the or Pb and Ni isotopes , and found that the energies and widths of the resonant states decrease with the increasing of the nuclear mass number for the two chains .

A≈160区奇质量数Tm同位素的能级结构

Energy Level Structure of Odd-A Tm Isotopes in A ≈ 160 Region

利用粒子-三轴转子模型，计算了A≈160区奇质量数Tm同位素系列的能级结构。

The energy levels of odd A Tm isotopes in A ≈ 160 region are calculated using the particle plus triaxial rotor model .

借助内标法校正由基体效应引起的系统误差，加入内标元素Sc、In和Tl分别修正质量数在100以下、100～180和180以上的元素测定，获得满意的结果。

The matrix suppression effects were corrected in determination with satisfactory results by adding the internal standard elements Sc , In and Tl.

微机控制离子质量数监控与锁定装置的研制

Microcomputer controlled ion mass number monitoring and locking

激光质谱法的质量数定标研究

Research on mass scale of laser mass spectrum

质量数为什么会大于原子质量

Why are mass numbers more than atomic mass

铀的同位素，原子质量数为，能进行持续的连锁反应。

A uranium isotope with mass number 235 ; capable of sustaining chain reactions .

从中得到44个质量数的链产额及质量分布曲线，其中12个链产额尚未见文献公开发表。

From these data , the total chain yields for 44 mass numbers were obtained .

分析质量数为1～80。

The analyze mass number is from 1 to 80.The system design reasonably operate simply .

此方法亦适用于样品中任意两种质量数相近的元素的卢瑟福背散射谱的分离以及浓度深度分布的转换。

Finally , the backscattering spectrum can be converted to the concentration depth profile of titanium .

酸性氨基酸残基的成盐反应，相应肽段质量数增加21.98（加钠盐）或37.95（加钾盐）；

Sodium ( 21.98 Da added ) or potassium ( 37.95 Da added ) salt formation of acidic amino acids ;

磷酸化肽段质量数的分布特征

These CB-LI neurons were detected in different distribution in every segment of spinal cord . Characteristic Distribution of Phosphorylated Peptide Masses

具有放射性的钴的同位素，原子质量数为，一种能量极高的伽马放射源，用于放射疗法。

A radioactive isotope of cobalt with mass number 60 ; a source of exceptionally intense gamma rays ; used in radiation therapy .

研究结果表明，对力对奇质量数核的作用可以用准粒子激发表示。

The results show that the effect of pairing is expressed in terms of one quasi particle excitation for the odd nuclidic mass nucleus .

结果：这些化学修饰至少包括：①半胱氨酸残基丙烯酰胺加合物生成或乙酰基烷基化修饰，相应的肽段质量数分别增加71.04和57.02；

Results : These modifications at least included : ① acrylamide adduct formation ( 71.04 Da added ) or alkylation of cysteine residues by iodoacetamide ( 57.02 Da added );

当测量到速度很大的时候，推断出的质量数比用能发光的东西来解释大很多。

When such velocity measurements are done on large scales , it turns out that the amount of inferred mass is much more than can be explained by the luminous stuff .

针对分离装置对工作介质的特殊要求，选择SeF6作为分离工作介质，并进行了单机分离试验，获得适用于级联设计的单机参数和单位质量数差的全分离系数γ0。

According to the special demand of a separation facility , SeF_6 is selected as working midium . By dint of separation test in a separation facility , some separation characteristic parameters which are necessary for a cascade design are acquired .

结果表明，增加集中质量数能提高带隙精度，晶格常数及组分比对带隙结构有较大影响，而丁腈橡胶的粘弹性能增大带隙宽度。

It could be concluded that the accuracy of band gaps can be improved by increasing the number of lumped-mass , the band gaps are remarkably affected by the lattice constant and volume fraction , in addition , the viscoelasticity makes the width of band gaps increase .

另外计算机还能对四极质谱计按实际需要选择不同的离子质量数和不同的离子流放大倍率，进行选择性的扫描，从而达到对不同质量和不同灵敏度的快速有效地实时测试的要求。

Computer make quadrupole mass spectrometer can choose enlarge rate of different ion mass number and different ion flow according to the need of reality , carry on the alternative scanning , thus reach to the request that test effectively and fast to different quality and different sensitivity .

在聚丙烯（PP）中加入10%～40%质量份数的聚对苯二甲酸乙二脂（PET）、反应增容剂三元乙丙橡胶接枝甲基丙烯酸缩水甘油酯（EPDM-g-GMA）及成核剂对PP进行共混改性。

Polypropylene is modified by reactive blending with PET ( 10 % ~ 40 % Wt ), reactive compatibilizer EPDM-g-GMA and nucleating agent .

在两者兼顾的情况下得到的性能优良的木材封边用热熔胶，配方如下：EVA树脂（28/150）30（质量份数）；

Results showed that the best formulation of EVA hot-melt adhesives for edge-sealing of wood-based panels was as follows : EVA resin ( 28 / 150 ) 30 ;

且当NHA质量份数为55%时制备的纳米羟基磷灰石复合材料的抗压强度和挠曲强度最高，其机械性能较好。

And When the proportions of NHA in composite materials is55 % , compression strength and flexural strength are highest . Mechanical properties is better . 2 .

结果：1、复合材料中NHA所占比例对其机械性能具有显著影响，当NHA与树脂基质质量份数比为55；45时，复合材料的机械性能最佳。

Result : 1 . The proportion of NHA in composite materials has effect remarkably for its mechanical properties , when the quality precondition of NHA and resin matrix is55:45 , the mechanical properties of the composite materials is optimal .

当加入的聚乙烯醇溶液质量份数为15wt%时，坯体强度最大（约1.62MPa），并且不存在残余颗粒团聚体，确定粘结剂含量为15wt%。

When the amount of PVA is 15wt % , the strength of the green compacts is maximal ( about 1.62MPa ), and no residual hard aggregates are present in green bodies . The amount of PVA is determined to be 15wt % .

修正了在手工艺制作中资源的质量平均数计算。

Correction of the calculation of the mean quantity of resources in crafting .

在所研究的工艺与配方中，交联剂质量份数为6%的试样的偶极子去极化程度达到75%。

A sample with 6 % of cross-linking agent had a degree of dipole depolarization of 75 % .

凝胶色谱结合多角激光光散射仪测定结果显示羧甲基几丁质的重均相对分子质量和数均相对分子质量及其分布系数分别为6.25×105、5.60×105和1.22。

The weight-averaged and the number-averaged molecular weights and polydispersity were 6.25 × 105 , 5.60 × 105 and 1.22 , respectively .

当碳化硅填料的质量份数在80～160（相对于环氧树脂100份）时，压缩强度达到较高值，粘接强度也保持在较好水平。

When the content of SiC filler is 80 ~ 160 parts by weight ( based on 100 parts by weight epoxy resin ) the compressive strength has higher values and the bonding strength also has better level .