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Synthesis,Crystal Structure and Antifungal Activity of New Furan-1,3,4-oxadiazole Carboxamide Derivatives

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Chinese Journal of Structural Chemistry 2022年第2期41卷 98-104,I0010页

作者： SUN Yue YANG Zi-Hui gu wen Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-forest Biomass Jiangsu Key Lab of Biomass-based Green Fuels and ChemicalsCo-inovation Center for Efficient Processing and Utilization of Forest ProductsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210031China

A series of novel furan-1,3,4-oxadiazole carboxamide derivatives (5a~5e) were designed,synthesized and characterized by spectroscopic methods including HR-MS,^(1)H-and ^(13)*** crystal structure of compound 5a was determined by single-crystal X-ray *** compound crystallizes in the triclinic system,space group P■ with a=4.7261(5),b=10.4672(11),c=14.5886(13)?,α=106.081(4)°,β=91.043(3)°,γ=99.456(4)°,Z=2,V=682.48(12)?^(3),M_(r)=348.16,D_(c)=1.694 Mg/m^(3),S=1.008,m=3.025 mm^(-1),F(000)=348,the final R=0.0775 and w R=0.2080 for 2774 observed reflections (I (29) 2σ(I)).There are two kinds of hydrogen bonds (N(3)–H(3A)×××N(2) and C(8)–H(8A)×××O(3)) present in its crystal *** preliminary antifungal assay showed that compounds 5b and 5c exhibited significant antifungal activities against several plant pathogenic fungi.

关键词： furan-1,3,4-oxadiazole carboxamide synthesis crystal structure antifungal activity

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根际微生境中生化过程的原位可视化研究进展

植物营养与肥料学报 2024年第7期30卷 1387-1395页

作者：顾文杰刘冲王丹李雅莹卢钰升吴杭涛解开治广东省农业科学院农业资源与环境研究所/农业农村部南方植物营养与肥料重点实验室/广东省养分资源循环利用与耕地保育重点实验室/广东省土壤微生物与耕地保育工程技术研究中心广东广州510640 岭南现代农业科学与技术广东省实验室茂名分中心广东茂名525000

根际及近根际区域(根际微生境)进行着活跃的物质交换和能量流动,大部分陆地生态系统中碳、氧和矿质元素等关键生源要素循环的生化过程都发生在根际微生境中。根际微生境空间动态过程的可视化对于准确捕捉和量化根际界面物质迁移转化过... 详细信息

根际及近根际区域(根际微生境)进行着活跃的物质交换和能量流动,大部分陆地生态系统中碳、氧和矿质元素等关键生源要素循环的生化过程都发生在根际微生境中。根际微生境空间动态过程的可视化对于准确捕捉和量化根际界面物质迁移转化过程和功能至关重要。过去几十年中,采用二维成像方法进行营养元素、酶和微生物等多种生化过程的同步原位可视化研究取得了重要进展。本文系统总结了根际化学环境、微生物环境和代谢物原位可视化研究的最新方法与研究进展,讨论了多参数成像技术在根际微生境研究中的应用前景,并对根际生化过程原位可视化研究的未来发展方向及亟待解决的问题进行了展望。为进一步提高根际原位可视化技术的研发与应用,深入解析微生境中生化过程与机制,需要在以下几方面重点展开研究:1)开展操作简单、耗时少、成本低的可视化技术开发,并进行多参数及多手段耦合的兼容性验证;2)从样品制备和数据整合等方面,开发根际三维及四维可视化方法,探索根际微生境的时空动态可视化;3)研发便携式仪器,开展根际原位可视化技术的田间应用。

关键词：根际微生境多参数成像技术原位可视化

Synthesis,Crystal Structure and Cytotoxic Activity of a New N-Vinyl-1H-dibenzo[a,c]carbazole Derivative of the Dehydroabietic Acid

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Chinese Journal of Structural Chemistry 2013年第12期32卷 1904-1910页

作者： gu wen HAO Yun CHEN Hong-Tu WANG Shi-Fa Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals College of Chemical EngineeringNanjing Forestry University

The title compound （C29H33NO2, 3） was synthesized and structurally characterized by elemental analysis, IR, MS, 1H- and 13C-NMR and single-crystal X-ray diffraction. The crystal is of monoclinic system, space group P21 with a = 14.428（3）, b = 7.3440（15）, c = 22.768（5） A, β = 95.17（3）°, V = 2402.7（8） A3, Z = 4, Mr = 427.56, Dc = 1.182 g/cm3, F （000） = 920, 2（MoKa） = 0.71073 A,μ = 0.073 mm-1, the final R= 0.0670 and wR= 0.1002 for 2437 reflections with I〉 2σ（I） Two crystallographically independent molecules with different conformations co-exist in the structure. The crystal structure is stabilized by intermolecular C-H…π interactions which make the molecules stack along the b axis. In addition, the preliminary cytotoxic assay showed that the title compound exhibited moderate inhibitory activity against KB and SW1116 cells.

关键词： dehydroabietic acid crystal structure 1H-dibenzo[a,c]carbazole cytotoxic activity

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锁定钢板治疗中老年肱骨近端骨折的疗效

临床骨科杂志 2024年第2期27卷 223-225页

作者：张永顾文浩杨茂清芜湖市中医医院骨科安徽芜湖241000 山东省文登整骨医院骨科山东威海264400

目的探讨锁定钢板治疗中老年肱骨近端骨折的疗效。方法采用锁定钢板治疗46例中老年肱骨近端骨折患者。记录骨折复位情况、骨折愈合时间、肩关节活动度。采用Neer评分评价肩关节功能。结果患者均获得随访,时间6~12个月。术后X线片显示:4... 详细信息

目的探讨锁定钢板治疗中老年肱骨近端骨折的疗效。方法采用锁定钢板治疗46例中老年肱骨近端骨折患者。记录骨折复位情况、骨折愈合时间、肩关节活动度。采用Neer评分评价肩关节功能。结果患者均获得随访,时间6~12个月。术后X线片显示:43例解剖复位,3例功能复位。43例骨折正常愈合,时间3~6个月;3例因术中未解剖复位而导致骨折延迟愈合,骨折愈合时间6~12个月。末次随访时,肩关节活动度:前屈70°~85°,后伸35°~40°,内旋70°~85°,外旋40°~50°;采用Neer评分评价肩关节功能:优31例,良9例,可3例,差3例,优良率86.96%。结论采用锁定钢板治疗中老年肱骨近端骨折,操作简单,固定可靠,患者可早期功能锻炼,有利于恢复肩关节功能。

关键词：肱骨近端骨折锁定钢板中老年

基于SSA-CatBoost 的颜色校正模型仿真

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计算机仿真 2024年第4期41卷 219-223,228页

作者：沈楠翔顾文娟李志文王洪成昆明理工大学机电工程学院云南昆明650504

针对图像采集设备在采集过程中出现的颜色失真以及传统方法存在校正效果不佳的问题,提出了一种结合SSA算法的CatBoost颜色校正模型。首先,建立三个CatBoost模型,并使用SSA算法分别搜索三个模型的最佳参数;然后将所得到的最优参数赋值给... 详细信息

针对图像采集设备在采集过程中出现的颜色失真以及传统方法存在校正效果不佳的问题,提出了一种结合SSA算法的CatBoost颜色校正模型。首先,建立三个CatBoost模型,并使用SSA算法分别搜索三个模型的最佳参数;然后将所得到的最优参数赋值给三个CatBoost模型,并分别对三通道的测量值与真实值进行拟合;最后,与传统多项式回归方法进行对比,校验此模型校正效果。模型仿真结果表明,上述模型可将色差值ΔE控制在3以内,证实了SSA-CatBoost模型具有更好的颜色校正。

关键词：颜色失真麻雀搜索算法对称决策树颜色校正

Axonotmesis-evoked plantar vasodilatation as a novel assessment of C-fiber afferent function after sciatic nerve injury in rats

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Neural Regeneration Research 2019年第12期14卷 2164-2172页

作者： Xue-Song Wang Xue Chen Tian-wen gu Ya-Xian Wang Da-guo Mi wen Hu Department of Orthopedics The Affiliated Hospital of Jiangnan University (The Third People’s Hospital of Wuxi City) Wuxi Jiangsu Province China Wuxi School of Medicine Jiangnan University Wuxi Jiangsu Province China Key Laboratory for Neuroregeneration of Ministry of Education and Co-innovation Center for Neuroregeneration of Jiangsu Province Nantong University Nantong Jiangsu Province China Department of Orthopedics Nantong Hospital of Traditional Chinese Medicine Nantong Jiangsu Province China

Quantitative assessment of the recovery of nerve function, especially sensory and autonomic nerve function, remains a challenge in the field of nerve regeneration research. We previously found that neural control of vasomotor activity could be potentially harnessed to evaluate nerve function. In the present study, five different models of left sciatic nerve injury in rats were established: nerve crush injury, nerve transection/ suturing, nerve defect/autografting, nerve defect/conduit repair, and nerve defect/non-regeneration. Laser Doppler perfusion imaging was used to analyze blood perfusion of the hind feet. The toe pinch test and walking track analysis were used to assess sensory and motor functions of the rat hind limb, respectively. Transmission electron microscopy was used to observe the density of unmyelinated axons in the injured sciatic nerve. Our results showed that axonotmesis-evoked vasodilatation in the foot 6 months after nerve injury/repair recovered to normal levels in the nerve crush injury group and partially in the other three repair groups;whereas the nerve defect/non-regeneration group exhibited no recovery in vasodilatation. Furthermore, the recovery index of axonotmesis-evoked vasodilatation was positively correlated with toe pinch reflex scores and the density of unmyelinated nerve fibers in the regenerated nerve. As C-fiber afferents are predominantly responsible for dilatation of the superficial vasculature in the glabrous skin in rats, the present findings indicate that axonotmesis-evoked vasodilatation can be used as a novel way to assess C-afferent function recovery after peripheral nerve injury. This study was approved by the Ethics Committee for Laboratory Animals of Nantong University of China (approval No. 20130410-006) on April 10, 2013.

关键词： nerve regeneration axonotmesis-evoked vasodilatation laser Doppler perfusion imaging nerve function autonomic nerve C-fiber afferent function peripheral nerve injury unmyelinated afferent fiber regeneration neural regeneration

Evaluation on the applicability of ERA5 reanalysis dataset to tropical cyclones affecting Shanghai

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Frontiers of Earth Science 2022年第4期16卷 1025-1039页

作者： Zhihui HAN Caijun YUE Changhai LIU wen gu Yuqi TANG Yongyu LI Shanghai Ecological Forecasting&Remote Sensing Center Shanghai 200030China Shanghai Marine Meteorological Center Shanghai 200030China National Center for Atmospheric Research Boulder CO80305USA Shanghai Baoshan Meteorological Bureau Shanghai 201900China

Based on the 16 historical tropical cyclones(TCs)affecting Shanghai from 2007 to 2019,the suitability of ERA5 for studying TCs affecting Shanghai is systematically evaluated from the perspective of TC track,intensity,10-m and upper-level wind,using TC best-track data of China Meteorological Administration and surface observations and sounding *** to tropical storm(TS),strong tropical storm(STS),typhoon(TY),strong typhoon(STY)and super typhoon(SuperTY),the median TC track bias is 68.1,52.9,42.5,25.4,and 18.2 km,respectively,the median maximum 10-m wind speed(VMAX10m)bias is-3.7,-6.5,-11.4,-21.7,and-32.2 m·s-1,respectively,and the median minimum mean sea level pressure(MSLPmin)bias is 2.2,5.6,8.1,28.2,and 48.7 hPa,*** the increase of TC intensity,the median TC track bias decreases,while the median VMAX10m and MSLPmin bias *** general,VMAX10m in ERA5 is lower than observed,and MSLPmin is larger than *** influence of TS,STS,TY and STY,the median 10-m wind speed(V10m)bias in the city is 3.2,4.2,4.7,and 5.4 m·s-1,respectively,and is 4.4-5.2 m·s-1 near the east coast,respectively.V10m is mostly biased high,showing an"M"type pattern with the distance between TC and *** median 10 m wind direction(WD10m)bias is in a range of-7° to+7°.The median upper-level wind speed(Vupper)bias decreases with height,with a maximum of~5 m·s-1 at 975 *** 900 hPa Vupperin ERA5 is typically larger than the radiosonde observation,and its mean bias error(MBE)increases with TC *** upper-level wind direction(WDupper)matches the sounding data well,with a maximum bias of a few degrees *** results provide a reference for the application of ERA5 to coastal cities affected by TCs.

关键词： ERA5 reanalysis tropical cyclone wind field urban

Te含量对Ag/SnO_(2)In_(2)O_(3)电接触材料组织及电接触性能的影响

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材料热处理学报 2024年第1期45卷 42-52页

作者：尹恒虎聂宝鑫周细应张国全王塞北顾文秀上海工程技术大学材料科学与工程学院上海201620 贵研中希(上海)新材料科技有限公司上海201603 昆明贵金属研究所云南昆明650032

采用合金内氧化法制备了不同Te含量的Ag/SnO_(2)In_(2)O_(3)电接触材料,利用X射线衍射(XRD)、X射线光电子能谱(XPS)和光学显微镜(OM)分析了Ag/SnO_(2)In_(2)O_(3)微观组织,利用JF04C触点测试系统测试了铆钉型触点的电接触性能,分析了Ag/... 详细信息

采用合金内氧化法制备了不同Te含量的Ag/SnO_(2)In_(2)O_(3)电接触材料,利用X射线衍射(XRD)、X射线光电子能谱(XPS)和光学显微镜(OM)分析了Ag/SnO_(2)In_(2)O_(3)微观组织,利用JF04C触点测试系统测试了铆钉型触点的电接触性能,分析了Ag/SnO_(2)In_(2)O_(3)电接触材料的转移损耗情况,并利用扫描电镜(SEM)对电接触材料动静触点电弧侵蚀形貌进行了分析,分析Te的添加对材料性能和燃弧机制的影响。结果表明:Te的添加有助于细化晶粒,并且随着Te含量增加,Ag/SnO_(2)In_(2)O_(3)材料形成了波浪状组织,Te的加入未对Ag、SnO_(2)和In_(2)O_(3)的存在形式造成影响,材料的相组成包括Ag、SnO_(2)、In_(2)O_(3)、TeO_(2)和单质Te。随着Te含量增加,材料的接触电阻呈现先上升后下降再上升的趋势,当Te的添加量为0.75%时,接触电阻最低且最稳定,熔焊力平均值为26.6 cN,低于常规模拟继电器30.6 cN的分断力。Te的添加改变了材料转移模式,减少了电弧侵蚀表面喷溅状侵蚀形貌的出现,当Te的添加量为0.75%时,电弧侵蚀表面产生的“猪网油”状的网状结构和“桑葚”状结构,对Ag/SnO_(2)In_(2)O_(3)材料在持续高频直流场合抗材料定向转移及抗熔焊性能方面改善显著,过量添加则会恶化触点性能。

关键词： Ag/SnO_(2)In_(2)O_(3) 碲元素电接触性能电弧侵蚀网状结构

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某高架大跨梁式渡槽抗震及隔震分析

长江科学院院报 2024年第3期41卷 186-193,202页

作者：韩钟骐敖选年潘鹏辜文兰王宝顺李克献清华大学土木工程系北京100084 云南省滇中引水工程建设管理局楚雄分局云南楚雄675000 清华大学土木工程安全与耐久教育部重点实验室北京100084

滇中引水工程场区具有地震频发、设防烈度高的特点,为保证其渡槽设施在地震下的安全性,以滇中引水工程某高架大跨梁式渡槽为研究对象,分析其抗震性能。通过大型通用有限元分析软件ABAQUS建立了考虑流固耦合作用的单跨渡槽模型,依据场区... 详细信息

滇中引水工程场区具有地震频发、设防烈度高的特点,为保证其渡槽设施在地震下的安全性,以滇中引水工程某高架大跨梁式渡槽为研究对象,分析其抗震性能。通过大型通用有限元分析软件ABAQUS建立了考虑流固耦合作用的单跨渡槽模型,依据场区地质条件选取地震动,对盆式橡胶支座、铅芯橡胶支座及摩擦摆支座渡槽进行弹塑性动力时程分析。结果表明,隔震支座渡槽的槽身最大位移平均比盆式橡胶支座渡槽降低25.5%,最大墩底弯矩平均降低24.3%,隔震性能良好。盆式橡胶支座比隔震支座渡槽的损伤严重,槽身与槽墩的损伤部位分别为槽底支座处、槽壁变截面处及墩底。空槽工况下,铅芯橡胶支座渡槽的最大位移比满槽增加10.4%,最大墩底弯矩降低21.4%;摩擦摆支座最大位移及墩底最大弯矩分别降低20.9%及32.2%。铅芯橡胶支座的隔震周期受上部质量影响大,而摩擦摆支座的隔震周期与上部质量无关,因此摩擦摆支座更适用于渡槽结构。

关键词：渡槽有限元模拟弹塑性时程分析隔震支座抗震性能

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