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Facile Synthesis and Charaterization of Silica Nanoscale Ionic Materials

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Journal of Wuhan University of Technology(Materials Science) 2013年第4期28卷 673-676页

作者：王雁冰 LI Wenjing long juan HUANG Zhixiong School of Materials Science and Engineering Wuhan University of Technology Key Laboratory of Advanced Technology for Specially Functional Materials of Ministry of Education Wuhan University of Technology

A series of silica nanoscale materials（NIMs） were prepared through a facile acid-base neutralization. These silica derivatives consist of a nanosilica core, a charged corana（sulfonic acid SIT） attatched to the core, and an oppositely charged canopy （PEG-substituted tertiary amines） to balance the corona. By selecting proper canopy such as surface-functionalized, silica can behave viscous liquid in the absence of any solvent at room temperature. DSC results indicated the melting temperature and glass transition of the derivatives were slightly lower than those of the neat polymer canopy, indicating strong interaction between the core and PEG-substituted tertiary amine.

关键词： slica acid-base neutralization ionic materials

Structural,Electronic and Optical Properties of the Monoclinic α-CoV_2O_6

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Chinese Journal of Structural Chemistry 2015年第5期34卷 799-806页

作者： KONG long-juan LIU Guang-Hua DAI Gen-Hong QIANG Ling Department of Physics Tianjin Polytechnic University School of Physics Peking University

First-principles calculations based on density functional theory are performed to investigate the structural,electronic and optical properties of monoclinic α-Co ***,the geometry structures obtained by geometry optimization are consistent with the experimental ***,the energy band structure is studied using both GGA and GGA＋U *** is found that the on-site Coulomb repulsion of the Co 3d orbital plays a key role in describing the electronic properties of α-Co V2O6,and is necessary to open the energy band *** to the partial density of states（PDOS）,significant Co–O and V–O hybridizations are observed in the valence and conduction bands,***,the Co–O and V–O bonds are found to have significant covalent *** the absorption threshold ~1.9 e V,no absorption can be ***,there exists a strong and wide absorption band in the energy range from 1.9 to 11 e *** novel optical properties imply that the α-Co V2O6 may have some potential optical applications.

关键词： geometry structure electronic property optical property

Endoscopic stricturotomy in the treatment of anastomotic strictures in inflammatory bowel disease(IBD)and non-IBD patients

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Gastroenterology Report 2020年第2期8卷 143-150,I0002,I0003页

作者： long-juan Zhang Nan Lan Xian-Rui Wu Bo Shen Laboratory of General Surgery the First Affiliated HospitalSun Yat-Sen UniversityGuangzhouGuangdongP.R.China Center for Inflammatory Bowel Disease Digestive Disease and Surgery InstituteThe Cleveland Clinic FoundationClevelandOHUSA Department of Colorectal Surgery and Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases the Sixth Affiliated HospitalSun Yat-Sen UniversityGuangzhouGuangdongP.R.China

Backgrounds:Endoscopic stricturotomy(ESt)has been shown to be effective in treating inflammatory bowel disease(IBD)-associated anastomotic ***,the outcome of ESt in benign,non-IBD conditions has not been *** aim of this study was to evaluate the outcome of ESt in the management of IBD and non-IBD-associated ***:Data of all consecutive IBD and non-IBD patients with benign anastomotic strictures treated with ESt from 2009 to 2016 were *** primary outcomes were surgery-free survival and procedure-related ***:A total of 49 IBD and 15 non-IBD patients were included in this *** IBD group included 25 patients with Crohn’s disease and 24 with ulcerative colitis and ileal *** diseases in the non-IBD group included colorectal cancer(n=7),diverticulitis(n=5),large bowel prolapse(n=2),and constipation(n=1).Immediate technical success was achieved in all patients in both *** complications occurred on five occasions(4.7%per procedure)in the IBD group,while no complication occurred in the non-IBD group(P=0.20).Stricture improvement on follow-up endoscopy was found in 10(20.4%)and 5(33.3%)patients in the IBD and non-IBD groups,respectively(P=0.32).Six(12.2%)patients in the IBD group and four(26.7%)patients in the non-IBD group eventually required stricture-related surgery(P=0.23).IBD patients appeared to have a higher tendency formaintaining surgery-free after the procedure than non-IBD patients(P=0.08).Conclusions:Endoscopic stricturotomy was shown to have comparable outcomes,though non-IBD patients seem to have a higher need for subsequent surgery but a lower complication rate than IBD patients.

关键词： endoscopic stricturotomy inflammatory bowel disease anastomotic stricture

Influence of Iron Ore Characteristics on FeO Formation During Sintering

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Journal of Iron and Steel Research International 2011年第5期18卷 5-10页

作者： WU Sheng-li WANG Qing-feng BIAN Miao-lian ZHU juan long Fang-yi School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The influence of iron ore characteristics on FeO formation during sintering was examined mainly in terms of chemical composition and the melting characteristics of iron ores. Statistical regression and X-ray diffraction were used to further explain the specific effect of iron ore characteristics on FeO formation. The results indicate that LOI （loss on ignition） in iron ores have a positive influence on FeO formation by promoting the sintering process of Fe2O3 decomposing and reducing. Silica contents in iron ores play a determining role in final content of FeO in sinter. The melting characteristics of iron ores significantly affect FeO formation during sintering.

关键词： iron ore characteristic chemical composition melting characteristic FeO formation

构建急性脑卒中事件发生的双能量颈动脉血管周围脂肪组织预测模型

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临床放射学杂志 2025年第1期44卷 53-58页

作者：张何龙娟王晨子周德兴夏学富宋聪王永鹿鹤张贺丁涛胡春峰徐凯孟闫凯徐州医科大学附属医院医学影像科 221002 徐州医科大学医学影像学院 221002 江苏省医学影像与数字医学工程研究中心 221002 徐州市贾汪区人民医院放射科 221011

目的基于双能量颈动脉血管周围脂肪组织(PVAT)特征,构建预测急性脑卒中事件发生的预测模型。方法回顾性分析同时行双能量颈动脉CTA、颅脑MRI检查的患者资料。将患者归为前循环供血区存在急性脑梗塞的急性脑卒中组(ACI组)、前循环供血区... 详细信息

目的基于双能量颈动脉血管周围脂肪组织(PVAT)特征,构建预测急性脑卒中事件发生的预测模型。方法回顾性分析同时行双能量颈动脉CTA、颅脑MRI检查的患者资料。将患者归为前循环供血区存在急性脑梗塞的急性脑卒中组(ACI组)、前循环供血区不存在急性脑梗塞的非急性脑卒中组(NACI组)。依据颈动脉管腔狭窄程度,将管腔狭窄1 mm,获得ROI区域内血管周围脂肪分数(PVFF)、虚拟平扫值(VNC)、碘浓度(IC)、电子云密度(Rho)、有效原子序数(Zeff)、双能量指数(DEI)及能谱曲线斜率(λ)。采用SPSS 21.0进行数据处理。定性资料的组间比较采用χ2检验。计量资料的组间比较采用t检验,不符合正态性分布采用Mann-Whitney U检验。将Plong检验比较不同ROC曲线间的差异。Plong检验差异均具有显著统计学意义(P=0.045,P=0.002)。结论基于双能量颈动脉PVAT特征构建的预测模型有助于预测急性脑卒中事件发生。

关键词：双能量CT CT血管成像颈动脉血管周围脂肪急性脑梗塞

Molecular assembly of recombinant chicken type II collagen in the yeast Pichia pastoris

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Science China(Life Sciences) 2018年第7期61卷 815-825页

作者： Caixia Xi Nan Liu Fei Liang Xiao Zhao juan long Fang Yuan Song Yun Yuying Sun Yongzhi Xi Department of Immunology and National Center for Biomedicine Analysis Beijing 307 Hospital Affiliated to Academy of Military Medical Sciences

Effective treatment of rheumatoid arthritis can be mediated by native chicken type II collagen(n CCII), recombinant peptide containing n CCII tolerogenic epitopes(CTEs), or a therapeutic DNA vaccine encoding the full-length CCOL2 A1 c DNA. As recombinant CCII(r CCII) might avoid potential pathogenic virus contamination during n CCII preparation or chromosomal integration and oncogene activation associated with DNA vaccines, here we evaluated the importance of propeptide and telopeptide domains on r CCII triple helix molecular assembly. We constructed p C-and p N-procollagen(without N-or Cpropeptides, respectively) as well as CTEs located in the triple helical domain lacking both propeptides and telopeptides, and expressed these in yeast Pichia pastoris host strain GS115(his4, Mut+) simultaneously with recombinant chicken prolyl-4-hydroxylase α and β subunits. Both p C-and p N-procollagen monomers accumulated inside P. pastoris cells, whereas CTE was assembled into homotrimers with stable conformation and secreted into the supernatants, suggesting that the large molecular weight p C-or p N-procollagens were retained within the endoplasmic reticulum whereas the smaller CTEs proceeded through the secretory pathway. Furthermore, resulting recombinant chicken type II collagen p Cα1(II) can induce collagen-induced arthritis(CIA) rat model, which seems to be as effective as the current standard n CCII. Notably, protease digestion assays showed that r CCII could assemble in the absence of C-and N-propeptides or telopeptides. These findings provide new insights into the minimal structural requirements for r CCII expression and folding.

关键词： recombinant chicken type II collagen molecular assembly propeptides telopeptides hydroxylation yeast Pichiapastoris

Sustainability and environmental enhancement in changing circumstances

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Journal of Environmental Sciences 2007年第4期19卷 469-469页

作者： LU Yong-long SHI Ya-juan Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Natural environment has endured fast economic growth and population explosion since the 20th century, which has brought a lot of problems. Global environmental change, soil erosion, land desertification, ozone layer depletion, bio-diversity reduction and persistent toxic and harmful pollutants are among the major environmental challenges.

关键词： In Sustainability and environmental enhancement in changing circumstances

Recombination and mutation shape variations in the major histocompatibility complex

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Journal of Genetics and Genomics 2022年第12期49卷 1151-1161页

作者： Yuying Sun Fang Yuan Ling Wang Dongfa Dai Zhijian Zhang Fei Liang Nan Liu juan long Xiao Zhao Yongzhi xi Department of Immunology and National Immunoassay Laboratory Fifth Medical Center of Chinese PLA General HospitalBeijing 100071China Institute of Beijing 307 Hospital Anhui Medical UniversityHefeiAnhui 230032China

The major histocompatibility complex(MHC)is closely associated with numerous diseases,but its high degree of polymorphism complicates the discovery of disease-associated *** principle,recombination and de novo mutations are two critical factors responsible for MHC ***,direct evidence for this hypothesis is ***,we report the generation of fine-scale MHC recombination and de novo mutation maps of~5 Mb by deep sequencing(>100×)of the MHC genome for 17 MHC recombination and 30 non-recombination Han Chinese families(a total of 190 individuals).Recombination hotspots and Han-specific breakpoints are located in close proximity at haplotype block *** average MHC de novo mutation rate is higher than the genome-wide de novo mutation rate,particularly in MHC recombinant ***,mutation and recombination generated polymorphisms are located within and outside linkage disequilibrium regions of the MHC,respectively,and evolution of the MHC locus was mainly controlled by positive *** findings provide insights on the evolutionary causes of the MHC diversity and may facilitate the identification of disease-associated genetic variants.

关键词： Major histocompatibility complex(MHC) Recombination De novo mutation Positive selection Disease-associated genetic variants

Structural Stability, Electronic and Magnetic Properties of O-doped Monolayer C_2N

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Chinese Journal of Structural Chemistry 2019年第1期38卷 76-82,3页

作者： CHEN Ying LIU Guang-Hua LI Yi-Peng KONG long-juan LIU Peng-Fei Department of Physics Tianjin Polytechnic University Institute of Physics Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences Dongguan Institute of Neutron Science

Based on the first-principles of density functional theory, the structural stability,electronic and magnetic properties of the O-doped monolayer C_2N are investigated. In details, the lattice parameters, band structures, density of states and phonon dispersions of O-doped monolayer C_2N are obtained and analyzed. Our results show that the introduction of oxygen dopants can cause a significant local lattice distortion. The band structure indicates that monolayer C_2N is a semiconductor with a direct band gap of 1.631 eV. The electronic properties of monolayer C_2N can be regulated by oxygen dopant atoms with different numbers. However, doping nonmetal oxygen element in monolayer C_2N does not affect its magnetic properties. In other words, the pure and O-doped systems are all nonmagnetic. The phonon dispersions of all the O-doped cases are found to have not any imaginary frequencies, which indicates that the structures of these O-doped systems have good structural stability.

关键词： O-doping electronic properties magnetic properties structural stability