| 1 | Optimizing Cr^(3+) concentration and evaluating energy transfer from Cr^(3+) to Nd^(3+) in Cr,Nd:GGG nanocrystals prepared by sol-gel method显示文摘Nanopowder of Cr:GGG and nanopowder of Cr,Nd:GGG with different concentrations of Cr^(3+) ranging from 0.1 at.% to 1.5 at.% were synthesized by the sol-gel method using acetic acid and ethylene glycol. Thermal gravimetric analysis and differential scanning calorimetry(TGA-DSC), X-ray diffraction(XRD) and photoluminescence spectroscopy were used to characterize the powder. The crystallite size was about 58 nm when treated at 1000 oC for 2 h. Cr^(3+) photoluminescence spectrum in GGG showed a broad band emission around 730 nm. The intensity of this band decreased when co-doped with Nd, indicating an efficient energy transfer from Cr^(3+) to Nd^(3+). Photoluminescence intensity of Nd in Cr,Nd:GGG at 1.06 μm showed that the optimum concentration of Cr^(3+) was about 1 at.%(more or less) for 1 at.% Nd^(3+). This result was also confirmed by chromium fluorescence decay rate analysis. Energy transfer efficiency was found to be about 84% for 1 at.% concentration of each chromium and neodymium. | Yassin Alshikh Mohamad Yomen Atassi Zafer Moussa | 2016 | Journal of Rare Earths2016，34，11： | 1 |
| 3 | The experiences of menstrual symptom changes among international students studying in China during the acculturation period: A phenomenology study显示文摘Objectives Menstruation is a normal physiological phenomenon among female which could be influenced by the process of acculturation.Few studies have explored the experience of menstrual symptom changes among international female students studying in China.Therefore,this paper aims to summarize international female students’experiences of menstrual symptom changes when they were studying in China and interpret these changes through considering the influence of acculturation on their social and academic lives.Methods We used a descriptive phenomenology approach.Structured in-depth face-to-face interviews were conducted between May and November 2019 among ten international female students studying in one Province located in south central China.Participants were those who reported having experienced menstrual symptom changes during the acculturation period,which was defined as the first six months of living in China.All interviews were audio-recorded,transcribed verbatim,and analyzed using NVivo 11.0 with the guidance of Colaizzi's seven-step method.Results The international female students’experiences of menstrual symptom changes were summarized and grouped into five main categories and 13 subcategories.The main categories include:1)demonstration of menstrual symptom changes,2)challenges of maintaining menstrual function in the new setting,3)coping styles to take care of menstrual health,4)consequences of the menstrual symptom changes,and 5)culture-based attitude toward menstruation.Conclusions International female students reported experiences of menstrual symptom changes,including somatic and psychological symptoms during the acculturation period.Culture barriers,academic stress,and sleep patterns are common factors influencing their menstrual symptom changes.More culturally-tailored interventions should be explored to improve the menstrual health of international female students in China. | Asem Alkhatib Weizi Wu Hoda Alshikh Ahmad Ratee Pakwan Suwal Zhao Ni Xianhong Li | 2023 | International Journal of Nursing Sciences2023，10，2： | 0 |
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