Rare earth elements (REEs) are considered emerging anthropogenic pollutants. Anthropogenic lanthanum, cerium, samarium, and gadolinium alone, or excess of all the REEs have already been reported in environment. In addition, it is only a matter time for neodymium (Nd) origin to be disseminated environment, given its growing demand new technologies use permanent magnets wind turbine. So far, few ...

Cutaneous neurofibroma 1/9/M 0 1.15 ND + + 2/10/M 0 0.62 ND 3/10/F 0 0.99 ND 4/14/M 1–10 1.32 ND 5/24/F 1–10 1.31 ND + + 6/27/M 11–100 0.65 15.6 (T) + + 7/32/M 11–100 0.52 ND 8/35/M 11–100 0.55 ND 9/36/M 101–1000 0.17 85.2 (T) 10/37/F 11–100 0.51 20.4 (H) 11/38/F 101–1000 0.52 ND 12/51/F 101–1000 0.29 10 (E) 13/59/F 11–100 0.41 ND 14/62/F 11–100 0.56 ND 15/63/F 11–100 0.38 ND + 16/66/F 101–1000...

Rare-earth (RE) containing alkali aluminoborosilicate glasses find increasingly broad technological applications, with their further development only impeded by yet-poor understanding of coordination environment and structural role RE ions in glasses. In this work we combine free induction decay (FID)-detected electron paramagnetic resonance (EPR), spin echo envelope modulation (ESEEM), MAS NMR...

Phonological neighborhood density (ND) conditions variation in a number of acoustic phonetic properties of words. For example, previous research has shown greater hyperarticulation and greater nasal coarticulation in high-ND English words than in low-ND words. Here, we investigate the effects of ND on vowel hyperarticulation and vowel nasality (coarticulatory and contrastive) in French. Acousti...

In order to investigate the deuteration effect on the vibrational dynamics of the NH and/or ND stretch excited levels of the 7-azaindole (7-AI) normal dimer and its tautomeric dimer, we have carried out infrared spectroscopy of three isotopic species for each dimers; undeuterated one (NH-NH) and one or two hydrogen atom(s) of the NH groups is deuterated ones (NH-ND and ND-ND, respectively). It ...

以Nd∶YAG、Cr∶Nd∶YAG和Ce∶Nd∶YAG三种激光材料为研究对象，采取以空间应用和地面应用为导向的两种太阳光谱模型，计算了太阳辐射光谱与材料吸收光谱之间的重叠效率。将激光材料的吸收系数引入重叠效率，分析了经吸收系数修正后，激光材料的太阳光谱匹配效率随吸收长度的变化关系。当接近光谱匹配效率极限值时，地面太阳光谱模型下Nd∶YAG、Cr∶Nd∶YAG和Ce∶Nd∶YAG所需要的吸收长度分别为6.5 cm、4.4 cm和3.7 cm，空间太阳光谱模型下所需要的吸收长度分别为7.3 cm、4.3 cm和3.8 cm，所研究的吸收长度为激光材料的长度参数设计提供了可供参考的最大值。同时Ce∶Nd∶YAG晶体计算出的长度最短，预计泵浦光在该材料中传输时引入的散射损耗将最小，因此以Ce∶Nd∶YAG晶体作为激光材料，有望进一步提高和改善太阳光泵浦激光器的输出性能。

Owing to its superior mechanical properties, nanodiamond (ND) holds great potential to improve tribological characteristics of composites. In this study, we report on the wear and dry friction of epoxy-ND composites prepared from as-received and aminated ND across the length scale range from macro to nano. Comparison of macroscale, microscale, and nanoscale frictional behavior shows that ND is ...