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Dependence of Deformation Twinning on Grain Orientation and Texture Evolution of High Manganese TWIP Steels at Different Deformation Temperatures

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Journal of Iron and Steel Research International 2011年第11期18卷 46-52页

作者： FANG Xiu-hui YANG Ping LU Fa-yun meng li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Mechanical properties, microstructure and texture evolution were studied in two tensile-deformed high manganese TWIP steels at different temperatures. Special attention was paid to the effects of deformation tempera- ture and grain orientation on twinning behavior. The results showed that, at --70 ℃ and at room temperature, both twins and hexagonal martensite were found in a lower manganese steel of 26Mn. With deformation temperature ris- ing, twins became less and they disappeared at 500 ℃. Strong 〈111〉 texture appeared at 300 ℃, while it weakened at 500 ℃ due to the low strain rate and higher stacking fault energy. EBSD measurement revealed the dependence of deformation twinning on grain orientation at all test temperatures.

关键词： high manganese steel warm deformation TWIP effect texture

维普期刊数据库

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土工布袋组合微型桩在顶升加固工程中的应用

甘肃科学学报 2014年第3期26卷 110-115页

作者：姜清华朱彦鹏李梦云张艳军中冶集团武汉勘察研究院有限公司湖北武汉430080 兰州理工大学土木工程学院甘肃兰州730000

土工布袋组合微型桩是对传统生石灰桩法加固湿陷性黄土的一种技术改进,通过桩身填料的不同配合比试验确定适合研究的最佳配比.在此基础上,通过理论计算得到组合微型桩在地基土中的平均膨胀率,从而推导计算出顶升加固单位面积地基土所需... 详细信息

土工布袋组合微型桩是对传统生石灰桩法加固湿陷性黄土的一种技术改进,通过桩身填料的不同配合比试验确定适合研究的最佳配比.在此基础上,通过理论计算得到组合微型桩在地基土中的平均膨胀率,从而推导计算出顶升加固单位面积地基土所需要的组合桩桩身体积.最后,通过某4层宿舍楼基础顶升加固实践对土工布袋组合微型桩技术进行检验,能为类似加固工程提供设计依据.

关键词：湿陷性黄土土工布袋微型桩顶升加固

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liSR28 Is Involved in Pollen Germination by Affecting Filamentous Actin Dynamics

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Molecular Plant 2013年第4期6卷 1163-1175页

作者： li-Juan Cao meng-meng Zhao Chang liu Huai-Jian Dong Wang-Cheng li Hai-yun Ren Key Laboratory of Cell Proliferation and Regulation Biology of Ministry of Education College of Life Science Beijing Normal University Beijing 100875China

Alternative splicing plays important roles in gene regulation and contributes to protein complexity. Previous studies suggest that alternative splicing exists in members of the villin/gelsolin/fragmin superfamily. In this study, a ser- ine/argine-rich （SR） protein cDNA with 28kDa protein （liSR28） was isolated from a lily （lilium Iongiflorum） expression library. Protein domain analysis showed that liSR28 had similar structures to Arabidopsis SR45 （AtSR45）, and liSR28 could complement the phenotype of loss of AtSR45 function. Therefore, overexpression of liSR28 and AtSR45 mutant （atsr45-1） were used in the following experiments. Overexpression of liSR28 in Arabidopsis completely inhibited pollen germina- tion. In contrast, the pollen germination of atsr45-1 was earlier than that of wild-type. In addition, pollen of atsr45-1 contained less F-actin at the corresponding hydration stage during pollen germination compared to that of wild-type. Alternative splicing analysis showed that Arabidopsis villinl （AtVLN1） transcript encoding the full-length protein was increased, and that encoding the truncated protein was decreased in atst45-1. Moreover, the mRNA expression level of other actin-binding proteins （ABPs） abundant in Arabidopsis pollen was also changed in atsr45-1. In conclusion, we hypothesize that liSR28 alters F-actin dynamics probably through its alternative splicing activities to affect directly or indirectly the alternative splicing of AtVLN1 and the expression of different ABPs, which then affects the pollen germination.

关键词： SR protein alternative splicing F-actin.

Laparoscopic vs open surgery for gastric cancer: Assessing time, recovery, complications, and markers

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World Journal of Gastrointestinal Surgery 2024年第1期16卷 40-48页

作者： yun-Yao Lu yun-Xiao li meng He Ya-li Wang Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment Chongqing University Cancer HospitalChongqing 400030China

BACKGROUND Gastric cancer(GC)is one of the most common cancers *** and mortality have increased in recent years,making it an urgent issue to ***-paroscopic radical surgery(LRS)is a crucial method for treating patients with GC;However,its influence on tumor markers is still under *** data of 194 patients treated at Chongqing University Cancer Hospital bet-ween January 2018 and January 2019 were retrospectively *** who underwent traditional open surgery and LRS were assigned to the control(n=90)and observation groups(n=104),*** sample t-tests andχ2 tests were used to compare the two groups based on clinical efficacy,changes in tumor marker levels after treatment,clinical data,and the incidence of posto-perative *** investigate the association between tumor marker levels and clinical efficacy in patients with GC,three-year recurrence rates in the two groups were *** Patients in the observation group had a shorter duration of operation,less in-traoperative blood loss,an earlier postoperative eating time,and a shorter hospital stay than those in the control group(P0.05).After treatment,the overall response rate in the control group was significantly lower than that in the observation group(P=0.001).Furthermore,after treatment,the levels of carbohydrate antigen 19-9,cancer antigen 72-4,carcinoembryonic antigen,and cancer antigen 125 decreased *** observation group also exhibited a significantly lower incidence rate of postoperative complications compared to the control group(P0.05).CONCLUSION LRS effectively treats early gastric cancer by reducing intraoperative bleeding,length of hospital stays,and postoperative complications.I

关键词： Laparoscopic radical surgery Gastric cancer Serum tumor markers Prognosis Recurrence Intraoperative bleeding

Human influence on the duration of extreme temperature events in Asia's hotspot regions

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Advances in Climate Change Research 2024年第2期15卷 312-326页

作者： Zi-meng WANG Hong-yun MA Wei li Hai-Shan CHEN Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)/Key Laboratory of Meteorological Disaster Ministry of Education(KLME)Nanjing University of Information Science and TechnologyNanjing 210044China

Observations and models indicate that human activities exert a considerable impact on the frequency and intensity of extreme temperature events,which are associated with global ***,changes in the duration of extreme temperature events and their association with human influence have not been considered in most ***,the possible relationship between the observed changes in the warm and cold spell duration(WSDI and CSDI)in hotspot regions during 1960-2014 and human influence was investigated based on the NCEP/NCAR reanalysis version 1 and Coupled Model Inter-comparison Project Phase 6(CMIP6)*** projection based on these attribution results was also *** optimal fingerprinting technique was used to compare observed changes in WSDI and CSDI to simulated changes averaged across eight CMIP6 *** show that anthropogenic(ANT)forcing contributed to the observed increase in WSDI in the three hotspot regions(West Asia,South Asia and Southeast Asia),with the majority of the changes being attributed to greenhouse gas ***,a generally weak ANT signal can be observed in the decreasing trend of CSDI and can be detected in South and Southeast *** influence of aerosol forcing remains undetected in either WSDI or CSDI,which differs from the results for frequency and intensity of extreme *** attribution results revealed that the constrained projection of WSDI is lower than the raw projection for 2015-2100 in West Asia and Southeast ***,no differences in future CSDI changes are found in Southeast Asia between the constrained and raw projections.

关键词： Extreme temperature events Duration Detection attribution Constraint projection Hotspot regions

降低日粮饲料蛋白质水平对猪生产性能及氮、磷排泄量影响研究

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郑州牧业工程高等专科学校学报 2013年第3期33卷 4-7页

作者：李梦云席磊邓红雨朱宽佑郑立刘太宇河南牧业经济学院河南郑州450011

本试验研究了降低日粮蛋白水平对DLY猪生产性能及氮、磷排泄量的影响。选用45头体重(62.5±3.46)kg的DLY猪,按体重相近的原则,随机分成3组,每组3个重复,每个重复5头猪,分别饲喂含14.5%CP日粮、12%CP日粮、12%CP+AA日粮。试验期28天。结... 详细信息

本试验研究了降低日粮蛋白水平对DLY猪生产性能及氮、磷排泄量的影响。选用45头体重(62.5±3.46)kg的DLY猪,按体重相近的原则,随机分成3组,每组3个重复,每个重复5头猪,分别饲喂含14.5%CP日粮、12%CP日粮、12%CP+AA日粮。试验期28天。结果表明:1)与14.5%CP日粮组相比,12%CP日粮组可显著降低猪日增重,提高料肉比(P0.05)。2)12%CP组猪食入氮、粪排出氮、尿排出氮、总排氮量、沉积氮比14.5%CP组分别极显著地减少了21.51%、16.81%、41.10%、29.94%和9.80%(P0.05)。3)12%CP组猪沉积磷和磷利用率显著低于12%CP+AA组和14.5%CP组(P0.05)。结果表明降低日粮蛋白水平,通过补充氨基酸,可极显著降低氮排泄量,而对磷的排泄量无显著影响。

关键词：低蛋白日粮生产性能氮排泄量磷排泄量猪

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