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糯米浆水泥砂浆的抗压与抗折性能试验研究（英文）

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Wuhan University Journal of Natural Sciences 2024年

作者：张鹄志熊新才李小宝周鲁云李立吴圣丰李玉琦冯帅周晓枫湖南科技大学土木工程学院湖南大学土木工程学院

糯米浆水泥砂浆是一种创造性的新型复合材料,探讨其力学性能和强度机理,对于未来的工程应用是一项十分必要的工作。为此,以糯米浆浓度和砂浆龄期为变量,展开5组糯米浆水泥砂浆试块的抗压与抗折性能对比试验和微观结构电镜分析。结果表明... 详细信息

糯米浆水泥砂浆是一种创造性的新型复合材料,探讨其力学性能和强度机理,对于未来的工程应用是一项十分必要的工作。为此,以糯米浆浓度和砂浆龄期为变量,展开5组糯米浆水泥砂浆试块的抗压与抗折性能对比试验和微观结构电镜分析。结果表明,浓度处于0.3%左右的糯米浆的加入,可以使后期的水泥砂浆微观结构趋于密实,抗折强度显著提高;而浓度大于1.0%的糯米浆的加入,将使后期的水泥水化产物聚合成团,微观结构松散,抗折强度大幅下降;这是因为随着糯米浆的加入,可以阻碍早期水泥水化反应的进行,从而使水泥砂浆早期强度偏低。分析机理可知,这种现象是由于糯米浆的加入引起浆体产生"减水"作用、聚合作用与缓凝作用造成的。

关键词：糯米浆水泥砂浆抗压强度抗折强度龄期微观结构强度机理

Real-time reception of NHS-OFDM signal with SPA- enhanced channel estimation for intensity-modulated direct-detection systems

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Chinese Optics Letters 2022年第5期20卷 7-13页

作者： Gang Chen Ming Chen Wen Chen Lede Yin Aitao Deng Yuxin Cai Dengqiao Wang School of Physics and Electronics Hunan Normal UniversityChangsha 410081China

In this Letter,we have experimentally verified a low-complexity subcarrier pairwise-averaging(SPA)-enhanced channel estimation(CE)method for small-size fast Fourier transform(FFT)non-Hermitian symmetric orthogonal frequency-division multiplexing(NHS-OFDM)*** with intra-symbol frequency averaging(ISFA),more than 20% look-up tables and 10%logic power consumption can be *** least-square(LS),ISFA,and SPA CE methods are compared by offline and real-time digital signal processing *** results show that the receiver sensitivity of the SPA NHS-OFDM transmission system with 64/128-point FFT can be improved by more than 1 dB at the bit error rate of 3.8 ×10^(-3) compared to the LS.

关键词： NHS-OFDM least-square intra-symbol frequency-averaging subcarrier pairwise-averaging

A new cave-dwelling blind loach, Triplophysa erythraea sp. nov.(Cypriniformes: Nemacheilidae), from hunan province, China

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Zoological research 2019年第4期40卷 331-336页

作者： Tai-Fu Huang Pei-Ling Zhang Xing-Long Huang Tao Wu Xiao-Yan Gong You-Xiang Zhang Qing-Zhong Peng Zhi-Xiao Liu College of Biology and Environmental Sciences Jishou University

DEAR EDITOR, A new blind loach species, Triplophysa erythraea sp. nov., from a karst cave in hunan province, central south China, is described based on morphology and cyt b gene sequencing. It can be distinguished from other species of Triplophysa by the following combi nation of characters: eyes absent;body scaleless and colorless;caudal-fin 17;maxillary barbel Ion gest;fins tran sparent, compressed pectoral-fin reachi ng 2/3 distanee between pectoral-fin and pelvic-fin origins;pelvicfin and dorsal-fin origins relative;posterior chamber of airbladder well developed, Iong, oval, and dissociative.

关键词： hunan province Triplophysa characters

Frankincense myrrh attenuates hepatocellular carcinoma by regulating tumor blood vessel development through multiple epidermal growth factor receptor-mediated signaling pathways

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World Journal of Gastrointestinal Oncology 2022年第2期14卷 450-477页

作者： Piao Zheng Zhen Huang Dong-Chang Tong Qing Zhou Sha Tian Bo-Wei Chen Di-Min Ning Yin-Mei Guo Wen-Hao Zhu Yan Long Wei Xiao Zhe Deng Yi-Chen Lei Xue-Fei Tian College of Integrated Traditional Chinese and Western Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Department of Integrated Traditional Chinese and Western Medicine The Second Xiangya HospitalCentral South UniversityChangsha 410011Hunan ProvinceChina The First Affiliated Hospital Hunan University of Chinese MedicineChangsha 410021Hunan ProvinceChina hunan Key Laboratory of Translational research in Formulas and Zheng of Traditional Chinese Medicine Hunan University of Chinese MedicineChangsha 410208Hunan ProvinceChina Institute of Integrative Medicine Department of Integrated Traditional Chinese and Western MedicineXiangya HospitalCentral South UniversityChangsha 410008Hunan ProvinceChina

BACKGROUND In traditional Chinese medicine(TCM),frankincense and myrrh are the main components of the antitumor drug Xihuang *** compounds show anticancer activity in other biological ***,whether frankincense and/or myrrh can inhibit the occurrence of hepatocellular carcinoma(HCC)is unknown,and the potential molecular mechanism(s)has not yet been *** To predict and determine latent anti-HCC therapeutic targets and molecular mechanisms of frankincense and myrrh in *** In the present study,which was based on the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(http://***/***),Universal Protein database(http://***),GeneCards:The Human Gene Database(http://***/)and Comparative Toxicogenomics Database(http://***/),the efficacy of and mechanism by which frankincense and myrrh act as anti-HCC compounds were *** core prediction targets were screened by molecular *** vivo,SMMC-7721 human liver cancer cells were transplanted as xenografts into nude mice to establish a subcutaneous tumor model,and two doses of frankincense plus myrrh or one dose of an EGFR inhibitor was administered to these mice continuously for 14 *** tumors were collected and evaluated:the tumor volume and growth rate were gauged to evaluate tumor growth;hematoxylineosin staining was performed to estimate histopathological changes;immunofluorescence(IF)was performed to detect the expression of CD31,α-SMA and collagen IV;transmission electron microscopy(TEM)was conducted to observe the morphological structure of vascular cells;enzyme-linked immunosorbent assay(ELISA)was performed to measure the levels of secreted HIF-1αand TNF-α;reverse transcription-polymerase chain reaction(RT-qPCR)was performed to measure the mRNA expression of HIF-1α,TNF-α,VEGF and MMP-9;and Western blot(WB)was performed to determine the levels of proteins expressed in the EGFR-mediated PI3K/Akt and

关键词： Hepatocellular carcinoma Frankincense Myrrh Network pharmacology Tumor blood vessels Multiple signaling pathways

形变热处理对2A12铝合金微观组织、织构及性能的影响

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稀有金属材料与工程 2023年第10期52卷 3363-3373页

作者：蹇海根肖可谋牌君君陈淼张唯湖南工业大学材料与先进制造学院湖南株洲412007 山东省先进铝基材料与技术重点实验室山东滨州262207 广东峰华卓立科技股份有限公司广东佛山528200 欧科亿数控精密刀具股份有限公司湖南株洲412500

利用扫描电镜显微观察(含能谱分析)和电子背散射衍射技术(Electron Backscatter Diffraction,EBSD)等分析方法研究了不同形变热处理制度对2A12铝合金板材的微观组织、织构及性能的影响。结果表明:2A12铝合金经形变热处理后,晶粒沿轧制... 详细信息

利用扫描电镜显微观察(含能谱分析)和电子背散射衍射技术(Electron Backscatter Diffraction,EBSD)等分析方法研究了不同形变热处理制度对2A12铝合金板材的微观组织、织构及性能的影响。结果表明:2A12铝合金经形变热处理后,晶粒沿轧制方向拉长,晶粒尺寸减小。随着形变热处理反复次数的增加,亚晶界比例降低,2°-15°的小角度晶界比例提高,大角度晶界比例先增后减,此时的退火过程由回复多边化主导转变为再结晶主导,再结晶程度提高。单步形变热处理样品因形变量较小,大小晶界和亚晶界比例较为接近。与退火制度相同的小变形样品相比,大形变热处理样品亚晶减少,大角度和小角度晶界增加,再结晶程度提高。形变量较大时,将存在Brass→R-Cu和m-Brass→Goss→R-Goss→Cube、T和P0°→Near rotated Cube和{102}的织构演变路径。单步小变形退火时,路径将改变为:R-Cu和m-Brass→Goss→R-Cube。随着变形量的增加,2A12铝合金的强度和硬度增加,韧性和塑性降低。

关键词： 2A12铝合金形变退火力学性能腐蚀性能织构

The roles and regulation of Yes-associated protein 1 in stem cells

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BIOCELL 2023年第1期47卷 33-39页

作者： QING YIN CAIHONG LIU WENYING JIANG HAIHUI GONG CHUNYUN LI ZUPING HE hunan Normal University School of Medicine Changsha410013China The Key Laboratory of Model Animals and Stem Cell Biology in hunan province Changsha410013China The Manufacture-Based learning research Demonstration Center for Human Reproductive Health New Technology of hunan Normal University Changsha410013China

Yes-associated protein 1(YAP1)is a downstream effector of the Hippo signaling pathway,and it is involved in tumorigenesis,tissue repair,growth,and *** this review,the biological roles and the mechanisms of YAP1 in mediating stem cell fate decisions are discussed,including cell proliferation,differentiation,and *** general,YAP1 promotes the proliferation and differentiation of stem cells,including embryonic stem cells and adult stem *** inhibits apoptosis by binding to the transcription factors,e.g.,transcriptional enhanced associate domain(TEAD),Smad,runt-related transcription factor 1/2,p73,p63,and Erb84,to maintain tissue *** translocalization of YAP1 in cellular nuclei and the phosphorylation in the cytoplasm work as important and unusual events for the activation of ***,YAP1 serves as the crosstalk for the Hippo pathway and other signaling pathways,including the Wnt and Notch *** is highlighted in this review that YAP1 is an essential regulator for stem cells that have significant applications in regenerative medicine and reproductive medicine.

关键词： YAP1 Hippo signaling pathway Stem cells Fate determinations

Effects of Polygonatum sibiricum Polysaccharide on Antioxidant Capacity of the Liver in High-fat Diet Rats

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Agricultural Biotechnology 2023年第4期12卷 12-15,24页

作者： Heyi GONG Zhifeng LI Chenzhong JIN Yihong HU Yan WANG Collaborative Innovation Center of Weed Control Technology and Application in Farmland of hunan province Key Laboratory of Green Prevention and Control of Crop Pest in Hunan Higher EducationHunan University of HumanitiesScience and TechnologyLoudi 417000China

[Objectives]This study was conducted to investigate the effects of Polygonatum sibiricum polysaccharide(PSP)on antioxidant function in high-fat diet obese rats.[Methods]Thirty five healthy male SD rats were selected to establish an obesity model after feeding a high-fat for 8 *** were then randomly divided into a normal group(NC),a high-fat diet group(HF),and an HF+*** polysaccharide group[HF+PSP,300 mg/(kg·d)].After 6 weeks of PSP intervention,the serum and liver of rats were collected,and the activity of aspartate transaminase(AST)and alanine aminotransferase(ALT)in serum,the enzyme activity of superoxide dismutase(SOD),catalase(CAT)and glutathione peroxidase(GSH-Px)and malondialdehyde(MDA)in liver tissue were *** pathological changes of liver tissue were observed by HE staining.[Results]Compared with the HF group,PSP could effectively inhibit obesity caused by high-fat *** reduced body weight and serum AST and ALT levels,increased the contents of T-SOD,CAT and GSH-Px in the liver,and inhibited the accumulation of MDA content,thereby reducing damage to liver cells caused by a high-fat *** indicated that PSP could effectively inhibit obesity in high-fat diet rats and enhance their antioxidant capacity.[Conclusions]This study provides a reference for the study of the antioxidant capacity of PSP.

关键词： Polygonatum sibiricum polysaccharide High-fat diet Obesity SD rat

Highly stable, active and recyclable solid acid catalyst based on polymer-coated magnetic composite particles

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Chinese Chemical Letters 2019年第12期30卷 2043-2046页

作者： Jianxin Luo Xucheng Zhang Chunyan Zhang Tao Wang Xue Chen Hongyu Chen Steve King Changchun Wang Department of Materials and Chemical Engineering Hunan Institute of TechnologyHengyang 421002China State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular ScienceFudan UniversityShanghai 200433China Dow Chemical China Holding Company Shanghai 201203China Dow Chemical Company Lake Jackson 77566United States

A facile approach has been adopted for coating cross-linked polystyrene(PS) shells on the surface of Fe304 magnetic clusters using reflux-precipitation polymerization(RPP).Treating the PS shell with chlorosulfonic acid yields magnetic composite particles with acid *** adjusting the amount and proportion of monomers(styrene and divinylbenzene),the obtained magnetic composite particle solid acid(MPM-5 S) exhibits a saturation magnetization value of 18 emu/g,a specific surface area of 243 m^2/g and an acid density of 2.113 mmol/*** MPM-5 S magnetic solid acid catalyst was evaluated for esterification of oleic acid with methanol to prepare *** mild conditions,the conversion of oleic acid reached 91%,which was much higher than the catalytic activity of Amberlyst-15 and close to the catalytic activity of concentrated H2 *** solid acid catalyst can be recovered by magnetic separation and reused three times maintaining over 95% of its initial catalytic ***,the solid acid can be used to catalyze the dehydration of fructose to 5-hydroxymethylfurfural.

关键词： Reflux precipitation polymerization Solid acid Magnetic separation Biodiesel Recyclability

Study on the Mechanism of Fu Zi Li Zhong Decoction in Treating Gastric Ulcer and its Effect on Gastrointestinal Microecology

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Digital Chinese Medicine 2019年第3期2卷 147-156页

作者： HUANG Jia-Wang YUAN Ping XIE Xi LIAO Can CHEN Ping-An WANG Jian ZHU Meng-Chen LI Ling College of Integrated Traditional Chinese and Western Medicine Hunan University of Chinese MedicineChangshaHunan 410208China College of Traditional Chinese Medicine Hunan University of Chinese MedicineChangshaHunan 410208China Medical College Hunan University of Chinese MedicineChangshaHunan 410208China

Objective To explore the pharmacodynamic mechanism of Fu Zi Li Zhong Decoction(FZLZD)in treating gastric ulcer and its effect on gastrointestinal *** Rat gastric ulcer model was established by continuous vinegar *** experiment included normal group,model group,ranitidine group and FZLZD *** animals were handled after intragastricing administration of corresponding clinical isodose drugs for 7 *** rats’gastrointestinal histopathology was observed by HE *** expression of ZO-1 and Occludin mRNA in rat gastric tissue was detected by *** diversity of intestinal flora was analyzed by 16SrDNA *** FZLZD can effectively improve gastric mucosal destruction,epithelial exfoliation,inflammatory cell infiltration,inflammatory substance exudation and edema in rats with gastric *** can effectively up-regulate the expression levels of ZO-1 and Occludin mRNA in gastric tissue of rats with gastric *** results of intestinal flora diversity showed that the diversity of intestinal flora in FZLZD group was significantly higher than that of model *** FZLZD can regulate gastric ulcer by promoting the expression of ZO-1 and Occludin and improving the diversity of intestinal flora.

关键词： Fu Zi Li Zhong Decoction(FZLZD) Gastric ulcer ZO-1 Occludin Intestinal flora diversity 16SrDNA