检索结果-南通市图书馆

Influence of solution concentration and temperature on the dissolution process and the internal structure of glauberite

引用

International Journal of Minerals,Metallurgy and Materials 2018年第11期25卷 1246-1255页

作者： yan-mei yu Wei-guo Liang Ji-shan Liu Mining Technology Institute Taiyuan University of Technology Key Lab of In-situ Property-improving Mining of Ministry of Education Taiyuan University of Technology Department of Chemical Engineering School of EngineeringThe University of Western Australia

Although transport in porous media under the influence of chemistry and temperature is a common phenomenon, the dissolution and internal structure evolution of glauberite during in-situ mining have been unique and challenging. This uniqueness indicates the complexity of mineral dissolutions, whereas the challenge represents the characterization of pore development and evolution during the dissolution processes. To investigate the microstructure development of glauberite under the influence of chemistry and temperature, experimental studies were performed with fine cuboid specimens of 4 mm × 4 mm × 9 mm soaked in solutions of different concentrations(fresh water, half-saturated, and saturated brine). The evolutions of internal structures were monitored through a micro computed tomography system. The statistical analysis indicated that the concentration and temperature of solutions significantly influenced the evolutions of pore size, porosity, and specific surface area of glauberite. The results showed that the increase in the rates of pore size, porosity, and specific surface area declined with time when glauberite was saturated in fresh water. The main reason for pore parameter variation is the differential concentration of solution. However, in the half-saturated and saturated solutions, the increase in rate increased with time. These observations suggest that the chloride ions contained in the saline solution could facilitate the dissolution of glauberite, whereas the existence of salt effect could contribute to the dissolution of calcium sulfate. Compared with the results at 20?C and 65?C, the studied parameters of glauberite have dramatically decreased when the mineral was soaked in the solutions at high temperature(95?C). This function was most striking in fresh water. The dissolution of glauberite soaked in fresh water or half-saturated brine solution was conditioned by the temperature and solution concentration. However, the dissolution of glauberite was les

关键词： solution mining porosity evolution glauberite dissolution pore characterization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Determination of static dipole polarizabilities of Yb atom

引用

Chinese Physics B 2018年第6期27卷 220-224页

作者： Zhi-Ming Tang yan-mei yu Chen-Zhong Dong Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Key Laboratory of Atomic and Molecular Physics ＆ Functional Materials of Gansu Province College of Physics and Electronic Engineering Northwest Normal University Lanzhou 730070 China

We determine the static values of the scalar and tensor dipole polarizabilities of the ground, 6s6p^3P0~o, and 6s6p^3P1~o states of the Yb atom. These results can be useful in many experiments undertaken using this atom. We employed a combined configuration interaction（CI） method and a second-order many-body perturbation theory（MBPT） to evaluate energies and electric dipole（E1） matrix elements of many low-lying excited states of the above atom. These values are compared with the other available theoretical calculations and experimental values. By combining these E1 matrix elements with the experimental excitation energies, we estimate the dominant valence correlation contributions to the dipole polarizabilities of the above states. The core contribution is obtained from the finite field approach. We also compare these values with the other theoretical results as there are no precise experimental values that are available for these properties.

关键词： ytterbium atom polarizabilities configuration interaction many-body perturbation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Finite-field calculation of electric quadrupole moments of^2P3/2,^2D3/2,5/2,and^2F5/2,7/2 states for Yb^+ion

引用

Chinese Physics B 2020年第5期29卷 203-207页

作者： Xi-Tong Guo yan-mei yu Yong Liu Bing-Bing Suo State Key Laboratory of Metastable Materials Science and Technology&Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Institute of Modern Physics Northwest UniversityXi’an 710069China

Electric quadrupole moments of low-lying excited states of Yb^+are calculated by relativistic coupled-cluster theory with perturbations from external *** field-dependent energy differentiation provides accurate values of the electric quadrupole moments of^2P3/2,^2D3/2,5/2,and^2F5/2,7/2 states which agree well with experimental *** important role of the electronic correlation to the electric quadrupole moments is *** calculations indicate the early dispute of the electric quadrupole moment of the Yb^+(2F7/2)state for which the measured and theoretical values have a large *** electric quadrupole moment values can help us to determine the electric quadrupole shifts in start-of-the-art experiments of the Yb+ion.

关键词： Yb^+ finite-field method electric quadrupole moment relativistic coupled-cluster

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Exploring the role of interleukin-6 receptor blockade in epilepsy and associated neuropsychiatric conditions through a mendelian randomization study

引用

World Journal of Psychiatry 2024年第8期14卷 1244-1253页

作者： yan-mei yu Gui-Hong Jin Chong Zhong Hao Qian Lei Wang Feng Zhan Department of Pediatrics The First People's Hospital of ChuzhouChuzhou 239001Anhui ProvinceChina Department of Wenzhou Institute University of Chinese Academy of SciencesWenzhou 325000Zhejiang ProvinceChina

BACKGROUND The interplay between inflammation,immune dysregulation,and the onset of neurological disorders,including epilepsy,has become increasingly ***(IL)-6,a pro-inflammatory cytokine,is suspected to not only mediate traditional inflammatory pathways but also contribute to neuroinflammatory responses that could underpin neuropsychiatric symptoms and broader psychiatric disorders in epilepsy *** role of IL-6 receptor(IL6R)blockade presents an intriguing target for therapeutic intervention due to its potential to attenuate these *** conditions due to *** Mendelian randomization(MR)analysis employing single nucleotide poly-morphisms(SNPs)in the vicinity of the IL6R gene(total individuals=408225)was used to evaluate the putative causal relationship between IL6R blockade and epilepsy(total cases/controls=12891/312803),focal epilepsy(cases/controls=7526/399290),and generalized epilepsy(cases/controls=1413/399287).SNP weights were determined by their effect on C-reactive protein(CRP)levels and integrated using inverse variance-weighted meta-analysis as surrogates for IL6R *** address potential outlier and pleiotropic influences,sensitivity analyses were conducted employing a variety of MR methods under different modeling *** The genetic simulation targeting IL6R blockade revealed a modest but significant reduction in overall epilepsy risk[inverse variance weighting:Odds ratio(OR):0.827;95%confidence interval(CI):0.685-1.000;P=0.05].Subtype analysis showed variability,with no significant effect observed in generalized,focal,or specific childhood and juvenile epilepsy *** the primary inflammatory marker CRP,the findings also suggested potential non-inflammatory pathways mediated by IL-6 signaling contributing to the neurobiological landscape of epilepsy,hinting at possible links to neuroinflammation,psychiatric symptoms,and associated mental *** The i

关键词： Epilepsy Interleukin-6 receptor blockade Mendelian randomization Neuroinflammation Psychiatric disorders

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fluorescence in situ hybridization in uncultured amniocytes for detection of aneuploidy in 4210 prenatal cases

引用

Chinese Medical Journal 2011年第8期124卷 1164-1168页

作者： JIA Chan-wei WANG Shu-yu MA yan-min LAN Yong-lian SI yan-mei yu Lan ZHOU Li-ying Reproductive and Genetic Medical Centre Beijing Obstetrics andGynecology Hospital Affiliated of Capital Medical UniversityBeijing 100026 China

Background Almost all reported fluorescence in situ hybridization （FISH） kits for prenatal diagnosis use probes from foreign （non-Chinese） countries. The aim of this study was to analyze the reliability of domestic （Chinese） FISH probe sets to detect aneuploidies of chromosomes 13, 18, 21, X, and Y related to prenatal diagnosis in 4210 *** Cytogenetic karyotyping was carded out as a standard prenatal diagnostic test, and amniotic fluid cell interphase FISH analysis was performed using two sets of probes （centromeric probes for chromosomes 18, X, and Y,and locus-specific probes for chromosomes 13 and 21） provided by GP Medical Technologies, Beijing, China. Then we compared the two results and found the performance characteristics for informative FISH results of aneuploidies by the domestic kit *** In 4210 cases, 4126 cases generated karyotype results and 133 abnormal karyotypes （including 97 aneuploidies） were found. The FISH results of 98 cases （among them, 31 cases gave normal cytogenetic results） were uninformative. The rate of abnormal cases was 3.2% （133/4126）. For the abnormal karyotypes, the rate of aneuploidy was 72.9% （97/133）. Among the 97 aneuploidies, there were 58 cases of trisomy 21 （58/97, 59.8%）, four cases of trisomy 13, 23 cases of trisomy 18, and 12 cases of sex chromosomal aneuploidies. The total concordance of the two methods was 97.9% （95/97; two cases were mosaics that had a low percentage of abnormal cells）, and the concordance of trisomy 21, 13, and 18 by the two methods was 100%.Conclusions The two sets of the domestic FISH kit probes are reliable for prenatal diagnosis. The results demonstrate that FISH is a rapid and accurate clinical method for prenatal identification of chromosome aneuploidies.

关键词： aneuploidy in situ hybridization prenatal diagnosis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

BPW91 Method Used in Analyzing Electronic Structures and Magnetic Properties of Nin(2-13)Clusters

BPW91 Method Used in Analyzing Electronic Structures and Mag...

引用

2014中国功能材料科技与产业高层论坛

作者： mei-yan yu Wan-xia Wang Shou-gang Chen Institute of Materials Science and Engineering Ocean University of China

The bond length,average binding energy,magnetic moment per atom and the ionic potential of Ni(2-13)clusters were calculatedin *** variations of magnetic moment per atom and the ionic potential agree well with experimental *** results show that BPW91/Lanl2dz method is the best method and basis set for nickel clusters research,*** ground state configurations and electronic structure properties of Ni(2-13)clusters wereinvestigated using the BPW91/LanL2DZ level of DFT *** the molecular orbital,we could ex-plain the paramagnetic and diamagnetic to the influence of the magnetic moment after different nickel cluster molecular hybridization.

关键词： Nickel clusters BPW91/Lanl2dz Binding energy Magnetic moment Ionic potential

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

How Much Do They Know about AIDS?——A Survey of AIDS Awareness among Migrants

引用

China Population Today 2006年第Z1期 27-29页

作者： By Liu Hongyan, yan Hong and yu mei(Liu Hongyan, senior research fellow, China Population and Development Research Center yan Hong, division chief, NPFPC yu mei, deputy division chief, NPFPC)

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

体外循环后羊心肌组织中水通道蛋白1表达及其与心肌水肿的关系

引用

上海交通大学学报（医学版） 2012年第1期32卷 32-36页

作者：闫玉梅丁芳宝梅举孙锟上海交通大学医学院附属新华医院心胸外科上海200092 上海交通大学医学院附属新华医院儿内科上海200092

目的探讨体外循环后羊心肌组织中水通道蛋白1(AQP1)的表达及其与心肌水肿的关系。方法健康成年羊24只,随机分为正常对照组(n=6)和体外循环组(n=18),体外循环组在体外循环结束后6个时点(2、6、12、24、48、72 h)取材,每个时点取3只动物... 详细信息

目的探讨体外循环后羊心肌组织中水通道蛋白1(AQP1)的表达及其与心肌水肿的关系。方法健康成年羊24只,随机分为正常对照组(n=6)和体外循环组(n=18),体外循环组在体外循环结束后6个时点(2、6、12、24、48、72 h)取材,每个时点取3只动物。采用Real-Time PCR、Western blotting、ELISA和干湿质量法检测正常对照组术后和体外循环组术后各时点心室肌组织中AQP1表达及心肌水肿的程度。结果正常羊心室肌组织中有AQP1表达,且左、右心室心肌组织的表达差异无统计学意义(P>0.05)。体外循环组在体外循环结束后各时点间心肌组织中AQP1表达差异均有统计学意义(P<0.05),表达趋势在mRNA和蛋白水平一致,均为体外循环结束后开始降低,6 h后达到最低,而后上升,于48 h达到峰值后再降低;心肌水肿程度各时点间差异也均有统计学意义(P<0.05),变化趋势随着体外循环后时间的推移逐渐增高,于48 h达到峰值后降低;AQP1 mRNA相对表达量与AQP1蛋白相对表达量之间存在正相关(r=0.971,P<0.05),AQP1蛋白相对表达量与心肌水含量呈正相关(r=0.592,P<0.05)。结论体外循环可影响羊心肌组织中AQP1表达及心肌水肿变化,且AQP1蛋白表达量与心肌水含量呈正相关。

关键词：体外循环心肌水肿水通道蛋白-1

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Silk damping in scalar-induced gravitational waves: a novel probe for new physics

引用

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 79-85页

作者： yan-Heng yu Sai Wang Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences School of Physics University of Chinese Academy of Sciences

Silk damping is well known in the study of cosmic microwave background（CMB） and accounts for suppression of the angular power spectrum of CMB on large angular multipoles. In this article, we study the effect of Silk damping on the scalar-induced gravitational waves（SIGWs）. Resulting from the dissipation of cosmic fluid, the Silk damping notably suppresses the energydensity spectrum of SIGWs on scales comparable to a diffusion scale at the decoupling time of weakly-interacting particles. The effect offers a novel observable for probing the underlying particle interaction, especially for those mediated by heavy gauge bosons beyond the standard model of particles. We anticipate that pulsar timing arrays are sensitive to gauge bosons with mass ～10～3-10～4 GeV, while space-and ground-based interferometers to those with mass ～10～7-1012GeV, leading to essential complements to on-going and future experiments of high-energy physics.

关键词： scalar-induced gravitational waves Silk damping new physics

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

西部各省陆生野生脊椎动物资源的能值估算

引用

四川动物 2005年第1期24卷 40-41,45页

作者：温涛谢锋颜鈺梅中国科学院成都生物研究所四川宜宾学院

　　本文采用能值分析方法对我国西部 9 省的陆上野生脊椎动物的能值进行了估算, 其中新疆、西藏和内蒙古的陆上野生脊椎动物能值货币价值很高, 说明其动物资源的环境综合生态价值非常大, 应充分加以保护,而四川和云南的物种多样性和... 详细信息

　　本文采用能值分析方法对我国西部 9 省的陆上野生脊椎动物的能值进行了估算, 其中新疆、西藏和内蒙古的陆上野生脊椎动物能值货币价值很高, 说明其动物资源的环境综合生态价值非常大, 应充分加以保护,而四川和云南的物种多样性和动物资源能值都很高, 因而应进行动物资源的合理开发和利用。

关键词：西部动物资源货币价值能值分析资源野生四川脊椎动物物种多样性合理开发

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：