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Synthesis and optical properties of novel apatite-type NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)yellow-emitting fluorophosphate phosphors for white LEDs

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Journal of Rare Earths 2022年第12期40卷 1827-1836,I0001页

作者： yuan Wang Guangliang Lu Yang Qiu Wen Sun siqi Qin Yifang Lin Bin Deng Dan zhang Ruijin Yu College of Science Northwest A&F UniversityYangling 712100China School of Chemistry and Environmental Science Xiangnan UniversityChenzhou 423043China Hunan Provincial Key Laboratory of Xiangnan Rare-Precious Metals Compounds Research and Application Xiangnan UniversityChenzhou 423043China College of Chemistry&Pharmacy Northwest A&F UniversityYangling 712100China Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials College of Materials and Chemical EngineeringChina Three Gorges UniversityYichang 443002China

In this study,novel yellow-emitting fluorophosphate NaCa_(3)Bi(PO_(4))_(3)F phosphors doped with different concentrations of Dy^(3+)ions were first obtained via high-temperature solid-state *** crystal structure,phase purity,particle morphology,photoluminescence(PL)properties,thermal stability,and luminescence decay curves of the resulting phosphors were then characterized in *** the excitation of 349 nm,the three dominant peaks of the NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)are centered at 480 nm(^(4)F_(9/2)-^(6)H_(15/2)),577 nm(^(4)F_(9/2)-^(6)H_(13/2)),and 662 nm(^(4)F_(9/2)-^(6)H_(11/2)).The optimal doping concentration of Dy^(3+)ions in the NaCa_(3)Bi(PO_(4))_(3)F:xDy^(3+)phosphors is x=5 mol%.The phosphors show excellent thermal stability with high activation energy(Ea=0.32 eV).Eventually,the synthesized white lightemitting diode(w-LED)demonstrates the Commission International de L’Eclairage(CIE)chromaticity coordinates of(0.341,0.334),a good correlated color temperature(CCT)of 5083 K,and a high color rendering index(Ra)of *** its potential as yellow-emitting phosphors,the feasibility of the fabricated apatite-type NaCa_(3)Bi(PO_(4))_(3)F:Dy^(3+)fluorophosphate phosphors was confirmed for wLEDs.

关键词： Fluorophosphate NaCa_(3)Bi(PO_(4))_(3)F Dy^(3+) Luminescence Phosphor LEDs

Electron-hole hybridization in bilayer graphene

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National Science Review 2020年第2期7卷 248-253页

作者： siqi Wang Mervin Zhao Changjian Zhang Sui Yang yuan Wang Kenji Watanabe Takashi Taniguchi James Hone Xiang Zhang NSF Nanoscale Science and Engineering Center (NSEC) University of California Materials Sciences Division Lawrence Berkeley National Laboratory Department of Mechanical Engineering Columbia University National Institute for Materials Science Faculties of Sciences and Engineering University of Hong Kong

Band structure determines the motion of electrons in a solid, giving rise to exotic phenomena when properly engineered. Drawing an analogy between electrons and photons, artificially designed optical lattices indicate the possibility of a similar band modulation effect in graphene systems. Yet due to the fermionic nature of electrons, modulated electronic systems promise far richer categories of behaviors than those found in optical lattices. Here, we uncovered a strong modulation of electronic states in bilayer graphene subject to periodic potentials. We observed for the first time the hybridization of electron and hole sub-bands, resulting in local band gaps at both primary and secondary charge neutrality points. Such hybridization leads to the formation of flat bands, enabling the study of correlated effects in graphene systems. This work may provide a novel way to manipulate electronic states in layered systems, which is important to both fundamental research and application.

关键词： band modulation periodic potential bilayer graphene

Research Progress on Structure and Bioactivity of Longan Polysaccharide

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Journal of Renewable Materials 2023年第4期11卷 1631-1642页

作者： Xiaolong Ji Shuli Zhang Xueyuan Jin Xin yuan siqi Zhang Xudan Guo Fengcheng Shi Yanqi Liu College of Food and Bioengineering Zhengzhou University of Light IndustryHenan Key Laboratory of Cold Chain Food Quality and Safety ControlHenan Collaborative Innovation Center for Food Production and SafetyZhengzhou450001China School of Clinical Medicine Hainan Vocational University of Science and TechnologyHaikou571126China BasicMedical College Hebei University of Chinese MedicineHebei Higher Education Institute Applied Technology Research Center on TCM Formula PreparationHebei TCM Formula Preparation Technology Innovation CenterShijiazhuang050200China Key Laboratory for Harmful Components and Tar Reduction in Cigarette of Sichuan Province Chengdu610000China

Longan originates from southern China and has high nutritional and health *** phytochemistry and pharmacology studies have shown that polysaccharides are a main bioactive component of *** polysaccharides possess antioxidant,anti-aging,anti-tumor,immunomodulatory,and other ***-water extraction,ethanol precipitation,and ultrasonic extraction are generally used to extract water-soluble longan ***,the relationship between the structure and bioactivity of longan polysaccharides remains unclear,requiring further *** aim of this review is to evaluate the current literature focusing on the extraction,purification,structural characterization,and biological activity of longan *** believe that this review would provide a useful bibliography for further innovation and a basis for using longan polysaccharides in functional food.

关键词： Longan polysaccharides structural characterization bioactivity

橡胶类型与替代率对机制砂砂浆基本性能的影响

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硅酸盐通报 2024年第12期43卷 4452-4460页

作者：延永东谭磊陆春华袁思奇王鑫江苏大学土木工程与力学学院镇江212013

为减小废弃橡胶填埋对环境的不利影响,将粉碎后的橡胶作为细骨料掺入砂浆,并进行了不同替代率的橡胶颗粒(NR20)与橡胶纤维(NRS)对机制砂砂浆工作性能、力学性能及抗冲击性能的影响试验。结果表明:随着橡胶替代率增加,橡胶颗粒砂浆的稠... 详细信息

为减小废弃橡胶填埋对环境的不利影响,将粉碎后的橡胶作为细骨料掺入砂浆,并进行了不同替代率的橡胶颗粒(NR20)与橡胶纤维(NRS)对机制砂砂浆工作性能、力学性能及抗冲击性能的影响试验。结果表明:随着橡胶替代率增加,橡胶颗粒砂浆的稠度逐渐增加,分层度逐渐减小,而橡胶纤维砂浆的稠度减小后基本保持不变,分层度逐渐增大;另外,两种类型橡胶砂浆的抗压、抗折强度均随橡胶替代率的增加而减小,且橡胶纤维砂浆的抗压、抗折强度较高。掺入橡胶后,砂浆的冲击破坏形态由单条裂缝贯穿破坏转变为多条裂缝发散破坏。砂浆内掺入橡胶越多,发生冲击破坏所需的冲击能耗越高,且橡胶纤维砂浆的冲击能耗提升幅度更大。

关键词：机制砂砂浆橡胶工作性能力学性能破坏形态冲击能耗

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中性粒细胞胞外捕获网防御机制的研究进展

现代畜牧兽医 2022年第4期 93-96页

作者：谢何昕鲁文赓司琳清袁思琦周继伟姚旭东黑龙江八一农垦大学动物科技学院黑龙江大庆163319

中性粒细胞作为先天免疫的吞噬细胞,在免疫防御中起核心作用。中性粒细胞胞外捕获网(NETs)的发现使中性粒细胞再次成为研究热点。NETs通过其内含的抗菌肽和诸多的酶系统进行捕获、抑制和杀灭病原微生物。NETs参与炎症和多种自身免疫调... 详细信息

中性粒细胞作为先天免疫的吞噬细胞,在免疫防御中起核心作用。中性粒细胞胞外捕获网(NETs)的发现使中性粒细胞再次成为研究热点。NETs通过其内含的抗菌肽和诸多的酶系统进行捕获、抑制和杀灭病原微生物。NETs参与炎症和多种自身免疫调节疾病的发生发展。文章就NETs的形成机制以及NETs的宿主防御作用展开综述,以期为相关研究及应用提供参考。

关键词：中性粒细胞防御机制中性粒细胞胞外捕获网

灌服酒炙车前子活性组分的胎衣不下奶牛血清代谢产物LC-MS/MS法分析

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黑龙江八一农垦大学学报 2023年第2期35卷 29-36,136页

作者：鲁文赓周继伟田春雨司琳清袁思琦谢何昕申贵男黑龙江八一农垦大学动物科技学院大庆163319 吉林省榆树市农业综合行政执法大队黑龙江八一农垦大学生命科学技术学院

早期研究过程中发现活性组分Ⅲ和Ⅵ为治疗奶牛胎衣不下的有效物质,并已阐明其化学成分,但尚未鉴定活性组分在体内的代谢产物,因此研究旨在利用液相色谱-串联质谱(LC-MS/MS)对活性组分Ⅲ和Ⅵ的血清样品进行分析。以ACQUITY UPLC HSS T3(2... 详细信息

早期研究过程中发现活性组分Ⅲ和Ⅵ为治疗奶牛胎衣不下的有效物质,并已阐明其化学成分,但尚未鉴定活性组分在体内的代谢产物,因此研究旨在利用液相色谱-串联质谱(LC-MS/MS)对活性组分Ⅲ和Ⅵ的血清样品进行分析。以ACQUITY UPLC HSS T3(2.1 mm×100 mm,1.8μm)为色谱柱条件,流动相以水(含0.05%甲酸)-乙腈进行梯度洗脱,采用ESI电喷雾离子源,正、负离子模式下收集活性组分Ⅲ和Ⅵ的血清样品的质谱数据,并根据碎片离子以及相对分子质量等信息与网络数据库以及相关参考文献进行比对。活性组分Ⅲ发现包括胺类、脂类在内的共24个化合物,活性组分Ⅵ包括酚类、烷类等共26个化合物,为研制高效、经济和便捷的防治奶牛胎衣不下的中药针剂提供了新方向。

关键词：酒炙车前子胎衣不下液相色谱-串联质谱代谢产物奶牛

IDeAS:an interactive database for dysregulated alternative splicing in cancers across Chinese and western patients

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Journal of Molecular Cell Biology 2023年第11期15卷 58-61页

作者： Hanwen Zhou Liyun yuan yuanhu Ju Yue Hu siqi Wang Ruifang Cao Zefeng Wang Guoqing Zhang National Genomics Data Center&Bio-Med Big Data Center CAS Key Laboratory of Computational BiologyShanghai Institute of Nutrition and HealthChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Chinese Academy of SciencesBeĳing 101408China Shanghai Southgene Technology Co. LtdShanghai 201210China Department of Biology Southern University of Science and Technology(SUSTech)Shenzhen 518055China

Splicing of pre-RNA is a key step in regulating eukaryotic gene *** human genes undergo alternative splicing(AS),where the splice sites in a single gene can be selectively paired to produce multiple isoforms,greatly expanding the functional diversity(Pan et al.,2008;Wang et al.,2008).The regulation of AS plays a critical role in many cellular activities,such as cell ***,the dysregulation of AS can lead to a variety of diseases,including cancers(Scotti and Swanson,2016).

关键词： expression cancers

Inhibition of protein degradation increases the Bt protein concentration in Bt cotton

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Journal of Integrative Agriculture 2024年第6期23卷 1897-1909页

作者： Yuting Liu Hanjia Li yuan Chen Tambel Leila.I.M Zhenyu Liu Shujuan Wu siqi Sun Xiang Zhang Dehua Chen Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops Yangzhou UniversityYangzhou 225009China Agricultural Research Cooperation Biotechnology and Biosafety Research CenterKhartoum 13314Sudan

Bacillus thuringiensis(Bt)cotton production is challenged by two main problems,i.e.,the low concentration of Bt protein at the boll setting stage and the lowest insect resistance in bolls among all the cotton plant’s ***,increasing the Bt protein concentration at the boll stage,especially in bolls,has become the main goal for increasing insect resistance in *** this study,two protein degradation inhibitors(ethylene diamine tetra acetic acid(EDTA)and leupeptin)were sprayed on the bolls,subtending leaves,and whole cotton plants at the peak flowering stage of two Bt cultivars(medium maturation Sikang 1(SK1))and early maturation Zhongmian 425(ZM425)in 2019 and *** Bt protein content and protein degradation metabolism were *** results showed that the Bt protein concentrations were enhanced by 21.3 to 38.8%and 25.0 to 38.6%in the treated bolls of SK1 and ZM425 respectively,while they were decreased in the subtending leaves of these treated *** the treated leaves,the Bt protein concentrations increased by 7.6 to 23.5%and 11.2 to 14.9%in SK1 and ZM425,*** combined application of EDTA and leupeptin to the whole cotton plant increased the Bt protein concentrations in both bolls and subtending *** Bt protein concentrations in bolls were higher,increasing by 22.5 to 31.0%and 19.6 to 32.5%for SK1 and ZM425,*** organs treated with EDTA or/and leupeptin showed reduced free amino acid contents,protease and peptidase activities and significant enhancements in soluble protein *** results indicated that inhibiting protein degradation could improve the protein content,thus increasing the Bt protein concentrations in the bolls or/and leaves of cotton ***,the increase in the Bt protein concentration without yield reduction suggested that these two protein degradation inhibitors may be applicable for improving insect resistance in cotton production.

关键词： Bt cotton Bt protein inhibition of protein degradation protein degradation metabolism

牛脂肪间充质干细胞对金黄色葡萄球菌生长的影响

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黑龙江八一农垦大学学报 2022年第1期34卷 25-31页

作者：杜珍珍司琳清李旭阳徐郑美袁思琦金吉东原冬伟付世新周玉龙鲁文赓黑龙江八一农垦大学动物科技学院大庆163319 黑龙江省牛病防制重点实验室科菲特饲料(长春)有限公司

为探讨成体奶牛脂肪来源的间充质干细胞(bAD-MSCs)对奶牛乳腺炎来源的金黄色葡萄球菌生长的影响,首先分离纯化来自奶牛乳腺炎病例中的金黄色葡萄球菌,并通过比浊法测定其在细胞用培养基中的生长曲线,进一步通过将金黄色葡萄球菌与奶牛... 详细信息

为探讨成体奶牛脂肪来源的间充质干细胞(bAD-MSCs)对奶牛乳腺炎来源的金黄色葡萄球菌生长的影响,首先分离纯化来自奶牛乳腺炎病例中的金黄色葡萄球菌,并通过比浊法测定其在细胞用培养基中的生长曲线,进一步通过将金黄色葡萄球菌与奶牛脂肪间充质干细胞共培养及体外平板计数法来探讨奶牛脂肪间充质干细胞对金黄色葡萄球菌体外增殖的作用。结果表明金黄色葡萄球菌在细胞用培养基中10 h以上达到对数生长期。与对照组相比较,金黄色葡萄球菌与bAD-MSCs共培养组具有较为显著的抑菌作用(P<0.05),而金黄色葡萄球菌与bAD-MSCs培养上清液共培养组显示了极为显著的抑菌作用(P<0.001);金黄色葡萄球菌与bAD-MSCs共培养组同金黄色葡萄球菌与bAD-MSCs培养上清液共培养组相比较,后者具有较为显著的抑菌效果(P<0.01)。研究表明:bAD-MSCs及其培养上清液具有显著的抑制金黄色葡萄球菌体外生长的能力,为防治奶牛乳腺炎的临床治疗提供了新的思路。

关键词：奶牛脂肪间充质干细胞金黄色葡萄球菌细菌生长乳腺炎