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Crystalline Germanium-Dipyrromethene Radicals:from a Delocalized Neutral to a Localized Cation

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Chinese Journal of Chemistry 2022年第20期40卷 2387-2392页

作者： Yuyang Dai Manling Bao Wenjuan Wang Zhuofeng Xie chunmeng liu Yuanting Su College of Chemistry Chemical Engineering and Materials ScienceSchool of Radiation Medicine and ProtectionSoochow UniversitySuzhouJiangsu215123 China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjingJiangsu210023 China

Both dipyrromethene complexes and radicals of heavier main group elements have been of high interest.However,cationic germanium radicals and dipyrromethene-based radicals of heavier main group elements are still escaped to be isolated.Herein,we report the isolation and full characterization of a neutral Ge(I)-masked dipyrromethene-based radical 3 and the first cationic Ge(III)-centered radical 5^(·+)as stable crystalline solids.3 behaves as a germanium(I)radical in its reaction with diphenyl disulfide to form the Ge-S bond,although X-ray crystallographic,EPR spectroscopic,computational studies revealed that the unpaired electron of 3 is mainly delocalized over the C_(9)N_(2)Ge backbone and the allylic radical character is also significant in 3.In contrast to 3,the spin density of 5^(·+)is mainly localized at the Ge center with minor contribution from the dipyrromethene ligand.Moreover,reduction of 5^(·+)with potassium graphite quantitatively regenerates 5,illustrating a reversible one-electron redox pair.

关键词： Radicals Main group element Germanium Dipyrromethene X-ray diffraction

Brualdi-type inclusion sets of Z-eigenvalues and l^k,s-singular values for tensors

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Frontiers of Mathematics in China 2020年第3期15卷 601-612页

作者： Hongmei YAO Li MA chunmeng liu Changjiang BU School of Mathematical Sciences Harbin Engineering UniversityHarbin 150001China

We give a Brualdi-type Z-eigenvalue inclusion set of tensors,and prove that it is tighter than the inclusion set given by G.Wang,G.L.Zhou,and L.Caccetta[Discrete Contin.Dyn.Syst.Ser.B,2017,22:187–198]in a special cas... 详细信息

关键词： Z-Eigenvalues digraph l^k,s-singular values rectangular tensors

Effect of organic materials on the chemical properties of saline soil in the Yellow River Delta of China

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Frontiers of Earth Science 2015年第2期9卷 259-267页

作者： Yan YU Jie liu chunmeng liu Shuang ZONG Zhaohua LU School of Chemical and Environmental Engineering China University of Mining and Technology (Beijing) Beijing 100083 China Transport Planning and Research Institute Ministry of Transport Beijing 100028 China

A 180-day incubation experiment was con- ducted to investigate the effect of different organic materials on the chemical properties of coastal soil with high salinity and relatively low pH. Four organic materials （three kinds of plant residues： straw, composted straw, and fresh reed; and one kind of poultry manure： chicken manure） were applied at a ratio of 15 g·kg^-1 to samples of costal saline soil from the Yellow River Delta of China. The results showed that the soil pH and exchangeable sodium percentage （ESP） decreased, whereas soil cation exchangeable capacity （CEC） and macronutrient concen- trations increased, regardless of the type of organic material used. All treatments showed a remarkable increase in soil soluble organic carbon （SOC） during the 180-day incubation. The peak values of SOC in descend- ing order were chicken manure, reed, composted straw, straw, and control soil. At the end of incubation, the highest level of SOC occurred in the straw-amended soil, followed by composted straw, reed, and chicken manure- amended soils. Soil respiration rate and available nitrogen were significantly influenced by the type of material used. Although reed-amended soil had a relatively high SOC and respiration rate, the ESP was reduced the least. Consider- ing the possible risk of heavy metals caused by chicken manure, it is proposed that straw and composted straw are the more efficient materials to use for reclaiming costal saline soil and improving the availability of macronu- trients.

关键词： organic material soil organic carbon salt-affected soil ESP respiration rate

m^(6)A甲基化修饰在眼科疾病中的研究进展

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国际眼科杂志 2024年第4期24卷 589-595页

作者：薛愚愚刘春梦陈婕叶河江成都中医药大学四川省成都市610072 成都中医药大学附属医院眼科四川省成都市610075

N6-甲基腺苷(m^(6)A)是真核细胞中最普遍、最丰富和最保守的RNA内部修饰方式。m^(6)A修饰主要通过m^(6)A甲基转移酶、m^(6)A去甲基化酶和m^(6)A甲基化识别蛋白调节RNA的剪接、稳定性、输出、降解和翻译等。近年来的研究发现,m^(6)A甲基... 详细信息

N6-甲基腺苷(m^(6)A)是真核细胞中最普遍、最丰富和最保守的RNA内部修饰方式。m^(6)A修饰主要通过m^(6)A甲基转移酶、m^(6)A去甲基化酶和m^(6)A甲基化识别蛋白调节RNA的剪接、稳定性、输出、降解和翻译等。近年来的研究发现,m^(6)A甲基化异常可能介导眼部的多种病理过程,参与代谢性、炎症性、退行性眼病和眼部肿瘤的发生发展,如糖尿病视网膜病变、白内障、年龄相关性黄斑变性、葡萄膜黑色素瘤等。本文就m^(6)A甲基化修饰在眼部组织细胞和眼科疾病中的作用进行综述,阐明m^(6)A甲基化在眼病中的潜在分子机制,可能为某些眼科疾病的患者提供新的治疗思路。

关键词： N6-甲基腺苷(m^(6)A) RNA甲基化糖尿病视网膜病变白内障年龄相关性黄斑变性葡萄膜黑色素瘤

Further Results on the Drazin Inverse of Tensors via Einstein Product

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Communications in Mathematical Research 2021年第4期37卷 537-549页

作者： chunmeng liu Lizhu Sun Changjiang Bu College of Mathematical Sciences Harbin Engineering UniversityHarbinHeilongjiang 150001P.R.China

In this paper,we give further results on the Drazin inverse of tensors via the Einstein product.We give a limit formula for the Drazin inverse of tensors.By using this formula,the representations for the Drazin inverse of several block tensor are obtained.Further,we give the Drazin inverse of the sum of two tensors based on the representation for the Drazin inverse of,a block tensor.

关键词： Tensor Drazin inverse Einstein product

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负载条件下燃烧试验装置校准方法探究

工业计量 2024年第1期34卷 30-31+36页

作者：刘春萌辽宁省计量科学研究院

目前对负载条件下燃烧试验装置的检测尚未有国家检定规程或校准规范可依据。文章探讨了其校准方法，目的就是为了解决负载条件下燃烧试验装置的溯源依据问题。针对负载条件下燃烧试验装置的电流、温度和时间三项核心性能指标，提出了相... 详细信息

目前对负载条件下燃烧试验装置的检测尚未有国家检定规程或校准规范可依据。文章探讨了其校准方法，目的就是为了解决负载条件下燃烧试验装置的溯源依据问题。针对负载条件下燃烧试验装置的电流、温度和时间三项核心性能指标，提出了相关的计量特性以及校准方法。

关键词：负载条件下燃烧试验装置电流温度时间校准方法

Luminescence tuning of Ce^3+,Pr^3+activated(Y,Gd)AGG system by band gap engineering and energy transfer

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Journal of Rare Earths 2020年第5期38卷 514-522页

作者： Yiyi Ou Weijie Zhou Fengkai Ma chunmeng liu Rongfu Zhou Fang Su Yan Huang Pieter Dorenbos Hongbin Liang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry KLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of Sciences.Beijing 100039China Faculty of Applied Sciences Delft University of TechnologyMekelweg 152629 JBDelftthe Netherlands

Tuning of phosphor luminescence properties,including the emission energy/intensity and thermal stability,is an important way to develop superior luminescent materials for diverse applications.In this work,we discuss the effect of band gap engineering and energy transfer on the luminescence properties of Ce^3+or Pr^3+doped(Y,Gd)AGG systems,and analyze the underlying reasons for their different phenomena.By using VUV-UV excitation spectra and constructing VRBE schemes,the changes of host band structure,5 d excited level energies and emission thermal stability of Ce^3+and Pr^3+with the incorporation of Gd^3+ions were studied.In addition,the energy transfer dynamics was also investigated in terms of the luminescence decay curves.This work demonstrates a way to tune phosphor luminescence properties by combining band gap engineering and energy transfer tailoring and provides an inspiring discussion on the different results of Ce^3+doping on the Ce^3+and Pr^3+emissions.

关键词： Garnet Scintillation Band gap engineering Energy transfer Rare earths

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圣草酚咀嚼片的制备及质量评价

中国药房 2024年第4期35卷 449-452页

作者：秦春梦李文军李辽平刘杰刘松青重庆医科大学药学院重庆400010 重庆医科大学附属第三医院药剂科重庆401120 重庆市力扬医药开发有限公司重庆400050

目的制备圣草酚咀嚼片,并对其进行质量评价。方法选择微晶纤维素(MCC)和甘露醇为填充剂,聚乙烯吡咯烷酮(PVP)为黏合剂,柠檬酸和三氯蔗糖为矫味剂,硬脂酸镁为润滑剂,以湿法制粒法制备咀嚼片;以各辅料的用量为因素,以外观、口感、风味、... 详细信息

目的制备圣草酚咀嚼片,并对其进行质量评价。方法选择微晶纤维素(MCC)和甘露醇为填充剂,聚乙烯吡咯烷酮(PVP)为黏合剂,柠檬酸和三氯蔗糖为矫味剂,硬脂酸镁为润滑剂,以湿法制粒法制备咀嚼片;以各辅料的用量为因素,以外观、口感、风味、质地为指标对圣草酚咀嚼片进行综合评分,利用正交实验方法优选圣草酚咀嚼片的辅料配比,并对采用优选处方制得的圣草酚咀嚼片的外观性状、重量差异、硬度、脆碎度、圣草酚含量、溶出度、含量均匀度进行评价。结果最佳处方为圣草酚26.4%(每片含50 mg)、甘露醇45%、MCC 25%、柠檬酸0.3%、三氯蔗糖0.3%、硬脂酸镁1%、PVP 2%(以纯化水配制成5%的溶液)。处方验证实验中3批圣草酚咀嚼片的综合评分分别为8.76、8.75、8.80(RSD=0.30%,n=3)。制得的圣草酚咀嚼片外观完整,表面光洁;平均片重为192.57 mg,平均硬度为57.36 N,脆碎度为0.09%,平均每片圣草酚含量为50.74 mg,30 min累积溶出度超过80%,含量均匀度为5.51。结论本研究优化处方所制圣草酚咀嚼片符合2020年版《中国药典》的相关要求。

关键词：圣草酚咀嚼片处方优化正交实验质量评价

渐进式肌肉放松训练配合认知行为护理对肺癌化疗患者的干预效果及对其睡眠质量和生活质量的影响

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中外医疗 2024年第5期43卷 137-140,150页

作者：何爱枝柳琴杨春梦南平市人民医院肿瘤内科福建南平353000

目的研究渐进式肌肉放松训练配合认知行为护理对肺癌化疗患者的干预效果及对其睡眠质量和生活质量的影响。方法单纯随机选取2020年3月—2022年9月南平市人民医院收治的280例肺癌化疗患者为研究对象,根据随机数表法分为两组,每组140例。... 详细信息

目的研究渐进式肌肉放松训练配合认知行为护理对肺癌化疗患者的干预效果及对其睡眠质量和生活质量的影响。方法单纯随机选取2020年3月—2022年9月南平市人民医院收治的280例肺癌化疗患者为研究对象,根据随机数表法分为两组,每组140例。对照组患者予以常规化疗护理,观察组患者予以渐进式肌肉放松训练配合认知行为护理。对比两组患者护理前后的心境状态、遵医嘱行为、癌因疲乏评分、睡眠质量及生活质量。结果护理4周后,观察组心境状态评分(36.89±4.73)分低于对照组的(41.31±5.25)分,差异有统计学意义(t=7.401,P<0.05);观察组遵医嘱行为总依从率高于对照组,差异有统计学意义(P<0.05);观察组癌因疲乏量表各维度评分及总分均低于对照组,差异有统计学意义(P均<0.05);观察组睡眠质量评分为(6.27±1.54)分低于对照组的(8.15±1.94)分,生活质量评分(87.38±5.43)分高于对照组的(82.63±5.25)分,差异有统计学意义(t=8.981、7.441,P均<0.05)。结论渐进式肌肉放松训练配合认知行为护理用于肺癌化疗患者,可改善其心境状态,提高其遵医嘱行为,降低癌因性疲乏,促进睡眠质量及生活质量的提升。

关键词：渐进式肌肉放松训练认知行为肺癌化疗心境状态睡眠质量生活质量