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Structure Refinement of Cs-rich na-li Beryl and Analysis of Its Typomorphic Characteristics of Configurations

Acta Geologica Sinica(English Edition) 2007年第1期81卷 61-67页

作者： liU Yan DENG Jun li Guowu SHI Guanghai State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key Laboratory of lithosphere Tectonics and lithoprobing Technology of the Ministry of Education China University of Geosciences Beijing 100083 Laboratory of Single-Crystal X-Ray Diffraction China University of Geosciences Beijing 100083

The tabular beryl found in Huya Country, Sichuan Province is a rare and special member among beryls. Chemical analysis reveals that the beryl is a new type of Cs-rich na-li beryl, and the content of alkalis （li20, na2O, K2O, Rb2O, Cs2O） is up to 2.41%. The CCD system on the SMART APEX four circle single crystal diffractometer was used in this experiment to determine the structure of the sample accurately. The beryl belongs to the hexagonal system; its space group is P6/mcc. The dimensions of the unit cell are as follows： a = 0.91961（3） nm, c = 0.91969（7） nm, c/a = 1.0000, V= 0.67357 nm3, 7 = 120°, α= 90°, β = 90°. The accurate atomic coordinates of alkali metal ions and other crystallographic parameters are also obtained： Z = 2, the calculated density D = 2.754 g/cm^3 and final R （ I 〉 2 σ （/3）= 0.046 for 5597 reflections. The crystal structure was described by coordination polyhedron. Based on the data gained, a three-dimensional graph of the crystal structure of tabular beryl was made with the ATOMS 6.0 software. The refinement of crystal structure indicates that there are two main reasons for the cause of the tabular configuration：（1） The substitution of Be by li into the tetrahedral framework weakened the stacked six-sided rings [Si6O18]^12- of the tetrahedral Si; （2） Alkalis （mainly na and Cs） are too large to substitute in four-fold or six-fold coordination within the structure and are accommodated in the vacant channel. The accommodation of these alkalis strengthened the structure of six-sided rings of the tetrahedral Si. And other alkali metal ions and free volatile molecules such as H2O and CO2 occupy variable positions in the channel. The equation of the electrovalence is li＋＋na＋→Be^2＋. According to structural and compositional differences, the monoclinic crystal of tabular beryl is considered to be a new member of the beryl group. Chemical constraints of the environment, namely, the bulk-rock chemistry and the fluid-phase composition and physical-chemica

关键词： beryl crystal structure tabular crystal typomorphic characteristics

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Pulp health and calcific healing of a complicated crown–root fracture with additional root fracture in a maxillary incisor: A case report

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World Journal of Clinical Cases 2025年第3期13卷 42-49页

作者： na li Yue-Yue Ren Ying Tang Qi Yang Tian-Tian Meng Song li Jing Zhang Stomatological Hospital and College Anhui Medical UniversityHefei 230032Anhui ProvinceChina Department of Endodontics The Affiliated Stomatological Hospital of Xuzhou Medical UniversityXuzhou 221000Jiangsu ProvinceChina

BACKGROUND Complicated crown–root fracture (CRF) involves severe injury to the crown, root,and pulp, and may be accompanied by multiple root fractures. The loss of a toothhas lifelong consequences for children and teenagers, but the maintenance of pulphealth and the calcific healing of multiple root fractures are rarely reported in *** SUMMARY This case reports healing of a permanent tooth with complicated crown–root andadditional root fractures, in which pulp health was maintained. A 10-year-old girlfell and fractured the root of her maxillary left central incisor at the cervical *** the coronal fragment was repositioned, the tooth was splinted until thetooth was no longer mobile, 2 years later. Eight years after treatment, the toothhas remained asymptomatic with vital pulp and localized gingival ***-beam computed tomography revealed not only calcified healing of the CRFbut also spontaneous healing in an additional undiagnosed root fracture. Thefracture line on the enamel could not be healed by hard tissue and formed agroove in the cervical crown. It was speculated that the groove was related to thelocalized gingival *** This case provides a clinical perspective of the treatment of a tooth with acomplicated CRF and an additional root fracture.

关键词： Complicated crown-root fracture Multiple root fracture Spontaneous healing Cone-beam computed tomography Long-term follow-up Case report

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Tuning electronic structure ofδ-MnO_(2) by the alkali-ion(K,na,li)associated manganese vacancies for high-rate supercapacitors

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Journal of Energy Chemistry 2021年第5期30卷 245-258页

作者： Lengyuan Niu lijin Yan Zhengwei Lu Yinyan Gong Taiqiang Chen Can li Xinjuan liu Shiqing Xu College of Optical and Electronic Technology China Jiliang UniversityHangzhou 311018ZhejiangChina College of Materials and Chemistry China Jiliang UniversityHangzhou 310018ZhejiangChina

Cation vacancies can bring numerous surprising characters due to its multifarious electron and orbit *** this work,d-MnO_(2) with alkali-ion(K,na,li)associated manganese(Mn)vacancies is fabricated by a simple hydrothermal reaction,and the correlation between their electronic structure and pseudocapacitance are systematically ***/TEM images have shown that the morphology of MnO_(2) is obviously changed after the introducing of cation *** position of alkali-ion in MnO_(2) structure can be controlled by adjusting the ion *** patterns and Raman spectra demonstrate that the alkali-ion is embedded in Mn vacancies at low concentration,while entered the interlayer of MnO_(2) at high *** existence of Mn vacancies will resulting in the distortion of neighboring atoms,leading to the electronic delocalization,and thus enhancing the conductivity,pseudocapacitance and rate capability of MnO_(2).Accordingly,the specific capacitances of optimized 0.4 KMO,0.4 naMO and 0.4 liMO samples are enhanced about 1.9,1.6 and 1.6 times compared to pure MnO_(2).Meanwhile,the rate performance has also been improved about 76%,46%and 42%,*** calculations further confirm that the Mn vacancies can generate additional occupancy states and cause an increase in carrier concentration,which will improve the conductivity and further boost the pseudocapacitance of MnO_(2).This result open up a promising approach to explore active and durable electrode materials.

关键词： Supercapacitor Manganese oxide Manganese vacancies Pseudocapacitance

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Bandgap narrowing and polarization enhancement in(K,na,li)(Nb,Sb,Ta)O_(3)+x%Fe_(2)O_(3) lead-free ceramics for photovoltaic applications

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Journal of Advanced Ceramics 2023年第7期12卷 1406-1417页

作者： Jian Chen Jiaxing Mao Zihui Wang Yanhui Dong Jinming Guo Mingkai li Yi Zhang Yinmei Lu Yunbin He Key Laboratory of Green Preparation and Application for Functional Materials Ministry of EducationHubei Key Lab of Ferro&Piezoelectric Materials and DevicesHubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Institute of Photoelectronic Thin Film Devices and Technology Tianjin Key Laboratory of Thin Film Devices and TechnologyNankai UniversityTianjin 300350China

The need for ferroelectric materials with both narrow bandgaps(Eg)and large remanent polarization(Pr)remains a key challenge to the development of high-efficiency ferroelectric photovoltaic(FPV)*** this work,[(K_(0.43)na_(0.57))_(0.94)li_(0.06)][(Nb_(0.94)Sb_(0.06))_(0.95)Ta_(0.05)]O_(3)(KNLNST)-based lead-free ceramics with narrow Eg and large P are obtained via Fe_(2)O_(3) *** optimizing the level of Fe_(2)O_(3) doping,a KNLNST+1.3%Fe_(2)O_(3) ceramic is fabricated that simultaneously possesses a narrow Eg of 1.74 eV and a large Pr of 27.05μC/cm^(2).These values are much superior to those of undoped KNLNST ceramics(Eg=3.1 eV and Pr=17.73μC/cm^(2)).While the large P stems from the increment of the volume ratio between the orthorhombic and tetragonal phases(Vo/VT)in KNLNST ceramics by proper amount of Fe3+doping,the narrow Eg is attributed to the coupling interaction between the Fe3+dopants and the B-site Sb3+host ***,a switchable photovoltaic effect caused by the ferroelectric depolarization electric field(Edp)is observed in the KNLNST+1.3%Fe_(2)O_(3) ceramic-based *** to the narrower Eg and larger P,of the doped ceramic,the photovoltaic performance of the corresponding device(open-circuit voltage(Voc)=-5.28 V and short-circuit current density(JSC)=0.051μA/cm^(2))under a downward poling state is significantly superior to that of an undoped KNLNST-based device(Voc=-0.46 V and Jse=0.039μA/cm^(2)).This work offers a feasible approach to developing ferroelectric materials with narrow bandgaps and large Pr for photovoltaic applications.

关键词： ferroelectrics bandgap(E_(g)) remanent polarization(P_(r)) photovoltaic effect [(K_(0.43)na_(0.57))_(0.94)li_(0.06)][(Nb_(0.94)Sb_(0.06))_(0.95)Ta_(0.05)]O_(3)(KNLNST)

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Inhibitory gamma-aminobutyric acidergic neurons in the anterior cingulate cortex participate in the comorbidity of pain and emotion

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Neural Regeneration Research 2025年第10期20卷 2838-2854页

作者： Lu Guan Mengting Qiu na li Zhengxiang Zhou Ru Ye liyan Zhong Yashuang Xu Junhui Ren Yi liang Xiaomei Shao Jianqiao Fang Junfan Fang Junying Du Department of Neurobiology and Acupuncture Research Third School of Clinical MedicineZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Key Laboratory for Research of Acupuncture Treatment and Transformation of Emotional Diseases Third School of Clinical MedicineZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Fuchun Community Health Service Center of Fuyang District HangzhouZhejiang ProvinceChina

Pain is often comorbid with emotional disorders such as anxiety and *** of the anterior cingulate cortex has been implicated in pain and pain-related negative emotions that arise from impairments in inhibitory gamma-aminobutyric acid *** review primarily aims to outline the main circuitry(including the input and output connectivity)of the anterior cingulate cortex and classification and functions of different gamma-aminobutyric acidergic neurons;it also describes the neurotransmitters/neuromodulators affecting these neurons,their intercommunication with other neurons,and their importance in mental comorbidities associated with chronic pain *** understanding on their role in pain-related mental comorbidities may facilitate the development of more effective treatments for these ***,the mechanisms that regulate gamma-aminobutyric acidergic systems remain *** is also unclear as to whether the mechanisms are presynaptic or *** exploration of the complexities of this system may reveal new pathways for research and drug development.

关键词： anterior cingulate cortex anxiety chronic pain circuit communication comorbidity depression gamma-aminobutyric acidergic neurons parvalbumin neurons synaptic transmission

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Construction of a Full-Length cDna library of Gossypium hirsutum L. and Identification of Two MADS-Box Genes

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Agricultural Sciences in China 2011年第1期10卷 28-40页

作者： WANG li-na WU Dong YU Shu-xun FAN Shu-li SONG Mei-zhen PANG Chao-you liU Jun-jie Cotton Research Institute Chinese Academy of Agricultural Sciences~Key Laboratory of Cotton Genetic Improvement Ministry of AgricultureAnyang 455000 P.R.China

A full-length normalized cDna library for the flower development stages of short-season cotton （Gossypium hirsutum L.）（CCRI36） was constructed. A total of 3 421 clones were randomly selected for sequencing, with a total of 3 175 effective sequences obtained after removal of empty-carriers and low-quality sequences. Clustering the 3 175 high-quality expressed sequence tags （ESTs） resulted in a set of 2 906 non-redundant sequences comprised of 233 contigs and 2 673 singletons. Comparative analyses indicated that 913 （43.6%） of the unigenes had homologues with function-known genes or functionassumed genes in the national Center for Biotechnology Information. In addition, 763 （36.4%） of the unigenes were functionally classified using Gene Ontology hierarchy. Through EST alignment and the screening method, the full-length cDna of two MADS-box genes viz., GhMADSll and GhMADS12 were acquired. These genes may play a role in flower development. Phylogenetie analysis indicated that GhMADS11 and GhMADS12 had high homology and close evolutionary relationship with AGL2/SEP-type and PI-type genes, respectively. The expression of both GhMADSll and GhMADS12, genes was high in reproductive organs. In floral organs, GhMADSll expression was high in petals （whor12） and ovules, while GhMADS12 expression was high in petals （whor12） and stamens （whor13）. Results show that the EST strategy based on a normalized cDna library is an effective method for gene identification. The study provides more insights for future molecular research on the regulation mechanism of cotton flower development.

关键词： cotton normalized cDna library EST MADS-box gene

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(K(0.52)na(0.44)li(0.04))(Nb(0.86)Ta(0.10)Sb(0.04))O3-BiFeO3无铅压电陶瓷的电性能

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硅酸盐学报 2011年第5期39卷 812-817页

作者：余祖灯江向平杨庆陈超涂娜周树兰景德镇陶瓷学院材料科学系江西省先进陶瓷材料重点实验室江西景德镇333001 广东道氏标准制釉股份有限公司广东佛山528000

采用固相法制备(1–x)(K0.52na0.44li0.04)(Nb0.86Ta0.10Sb0.04)O3–xBiFeO3[(1–x)LF4–xBF]无铅压电陶瓷,研究BF含量(0≤x≤0.010 00)对LF4陶瓷微观结构和电性能的影响。结果表明:所有样品均具有纯的四方钙钛矿结构,引入BF能明显改善LF4陶瓷的致密性,样品的机械品质因子Qm得到显著提高,压电性能和铁电性能随x的增加呈现出先升高后降低趋势。当x=0.002 50时,材料表现出优异性能:相对密度ρ=98.6%,压电常数d33=276pC/N,机械品质因子Qm=454,矫顽场Ec=1.56 kV/mm,剩余极化强度Pr=21.5μC/cm2。热稳定性和老化性研究结果显示:x=0.002 50时制备的LF4-BF体系样品具有稳定的电性能,表明该陶瓷在高温条件下具有潜在的应用前景。

关键词：无铅压电陶瓷固相反应法压电性能老化性能

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小肠黏膜下层脱细胞基质复合外泌体构建组织工程尿道

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中国组织工程研究 2025年第23期29卷 4907-4914页

作者：王丹朱小军李志成李娜内蒙古医科大学附属医院泌尿外科内蒙古自治区呼和浩特市010050

背景:小肠黏膜下层脱细胞基质已被临床与基础研究证实可用于尿道的修复重建,但其单独应用时存在宿主细胞生长缓慢、支架血管化不足而成活困难、重建尿道狭窄梗阻等问题,仅适用于较短的尿道狭窄。目的:探讨应用小肠黏膜下层脱细胞基质复... 详细信息

背景:小肠黏膜下层脱细胞基质已被临床与基础研究证实可用于尿道的修复重建,但其单独应用时存在宿主细胞生长缓慢、支架血管化不足而成活困难、重建尿道狭窄梗阻等问题,仅适用于较短的尿道狭窄。目的:探讨应用小肠黏膜下层脱细胞基质复合外泌体构建组织工程尿道的可行性。方法:从新西兰大白兔骨髓间充质干细胞中分离提取外泌体;制备猪小肠黏膜下层脱细胞基质,将外泌体负载于小肠黏膜下层脱细胞基质上。将小肠黏膜下层脱细胞基质-外泌体(PKH26染料标记)复合物与脐静脉内皮细胞共培养12 h,观察细胞摄取外泌体情况。选取生长状态良好的脐静脉内皮细胞,分3组培养:空白组常规培养,对照组加入小肠黏膜下层脱细胞基质,实验组加入小肠黏膜下层脱细胞基质-外泌体复合物,通过划痕实验、成管实验、血管生成因子分泌检测评估血管生成情况。取30只新西兰大白兔,建立长段(3 cm)尿道缺损模型,采用随机数字表法分3组干预(n=10):单独材料组植入小肠黏膜下层脱细胞基质,对照组植入小肠黏膜下层脱细胞基质-骨髓间充质干细胞复合物,实验组植入小肠黏膜下层脱细胞基质-外泌体复合物,植入后12周进行尿道造影、尿动力学检查及重建尿道切片病理观察。结果与结论:(1)荧光显微镜下可见小肠黏膜下层脱细胞基质中的外泌体可被脐静脉内皮细胞摄取。(2)与空白组、对照组相比,实验组材料可促进脐静脉内皮细胞的迁移、成血管能力以及成血管因子血管内皮生长因子、肝细胞生长因子、白细胞介素8的分泌(P <0.05)。(3)尿道造影结果显示,单独材料组10只兔均出现尿道狭窄,对照组10只兔中2只出现尿道狭窄,实验组10只兔均未出现尿道狭窄。尿动力检查结果显示,单独材料组兔材料植入后12周的最大尿道压高于术前(P <0.05),对照组、实验组兔植入后12周的最大尿道压均低于空白组(P <0.05)。苏木精-伊红、Masson与免疫组化染色显示,单独材料组可见明显的再生上皮层、少量的皮下平滑肌与血管,以纤维组织增生为主,伴有明显炎性细胞浸润;对照组可见较完整的再生上皮与少量胶原,可见大量的皮下血管与平滑肌,伴有炎性细胞浸润;实验组可见完整的再生上皮层与大量的皮下血管、平滑肌,未见明显炎性细胞浸润,实验组AE1/AE3、ɑ-平滑肌肌动蛋白、CD31阳性表达均高于单独材料组、对照组(P <0.05)。(4)结果表明,小肠黏膜下层脱细胞基质-外泌体组织工程尿道可通过促进血管生成来修复尿道缺损。

关键词：尿道损伤尿道狭窄小肠黏膜下层脱细胞基质细胞外基质外泌体组织工程尿道

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Identification of a novel mtDna lineage B3 in chicken (Gallus gallus domesticus)

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Zoological Research 2017年第4期38卷 208-210页

作者： xun-he huang gui-mei li xing chen ya-jiang wu wei-na li fu-sheng zhong wen-zhi wang zhao-li ding school of life sciences jiaying universityMeizhou Guangdong 514015China kunming biological diversity regional center of large apparatus and equipments chinese academy of sciencesKunming Yunnan 650223China public technical service center kunming institute of zoologychinese academy of scienceKunming Yunnan 650223China state key laboratory of genetic resources and evolution kunming institute of zoologychinese academy of sciencesKunming Yunnan 650223China state key laboratory for conservation and utilization of bioresource in yunnan yunnan universityKunming Yunnan 650091China forensic science service of yunnan endangered species scientific commission Kunming Yunnan 650223China

DEAR EDITOR, In this study, we sequenced the complete mitochondrial Dna genome （mitogenome） of the Zhengyang Yellow chicken （Gallus gallus domesticus） by next-generation sequencing technology. Samples were taken from Zhumadian city, Henan Province, China. The complete mitogenome was 16 785 bp in size, and had a nucleotide composition of 30.3% （A）, 23.7% （T） 32.5% （C）, and 13.5% （G）, with a high AT content of 54.0%. The assembled mitogenome exhibited typical mitochondrial Dna （mtDna） structure, including a non-coding control region, two rRna genes, 13 protein-coding genes, and 22 tRna genes. Phylogenetic analysis indicated that this mitogenome defined a novel sub-haplogroup B3 within haplogroup B. These results should provide essential information for chicken domestication and insiqht into the evolution of genomes.

关键词： Dna Identification of a novel mtDna lineage B3 in chicken Gallus gallus domesticus

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In situ constructing(MnS/Mn_(2)SnS_4)@N,S-ACTs heterostructure with superior na/li-storage capabilities in half-cells and pouch full-cells

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Chinese Chemical Letters 2024年第11期35卷 522-527页

作者： Dai-Huo liu Ao Wang Hong-Yan Lü Xing-Long Wu Dan Luo Wen-Hao li Jin-Zhi Guo Haozhen Dou Qianyi Ma Zhongwei Chen Key Laboratory of Green Chemical Media and Reaction Ministry of EducationCollaborative Innovation Center of Henan Province for Fine Chemicals Green Manufacturing of Fine ChemicalsSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China Faculty of Chemistry Northeast Normal UniversityChangchun 130024China MOE Key Laboratory for UV light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China Power Battery and Systems Research Center Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Department of Chemical Engineering Waterloo Institute for NanotechnologyWaterloo Institute for Sustainable EnergyWaterloo UniversityWaterlooON N2L 3G1Canada

Effective design of nanoheterostructure anode with high ion/electron migration kinetics can give electrode with superior electrochemical ***,the design and preparation of nanoheterostructure composites with high-capacity and long cycling life in half and pouch full cells remain a big ***,a novel micro-pore MnS/Mn_(2)SnS_(4)heterostructure nanowire were in situ encapsulated into the N and S elements co-doped amorphous carbon tubes(abbreviated as(MnS/Mn_(2)SnS_(4))@N,S-ACTs)and showed superior energy storage properties in na-/li-ion half cells and pouch full *** na-/li-storage capabilities improvement are attribute to the strong synergistic effect between MnS/Mn_(2)SnS_(4)heterostructure and N,S-ACTs protective layer,the former induces an local built-in electric field between Mn_(2)Sn S_(4)and MnS during charging/discharging,accelerating interfacial ion/electron diffusion dynamics,the latter effective maintains the morphology and volume evolution during na~+/li~+charging/discharging,achieving a long-term cycling stability(e.g.,high discharge capacity of 79.2 mAh/g with the capacity retention of 79.3%can be gained after 2200 cycles at 3 C in(Mn S/Mn_(2)Sn S_(4))@N,S-ACTs//liFePO_(4)pouch full cells;a high capacity of~34 mAh/g at 10 C can be got with a Coulombic efficiency of 100%after 1000 cycles in pouch(Mn S/Mn_(2)Sn S_(4))@N,S-ACTs//na_(3)V_(2)(PO_(4))_(2)O_(2)F full cells.

关键词： (MnS/Mn_(2)SnS_(4))@N S-ACTs Heterostructure Long cycling life na-/li-ion half cells Pouch full cells

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