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2,3-Butanediol from the leachates of pine needles induces the resistance of Panax notoginseng to the leaf pathogen Alternaria panax

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Plant Diversity 2023年第1期45卷 104-116页

作者： Tian-Yao Li Chen Ye Yi-Jie Zhang Jun-Xing Zhang Min Yang Xia-Hong He Xin-Yue Mei Yi-Xiang Liu You-Yong zhu Hui-Chuan Huang shu-sheng zhu School of Agriculture Yunnan UniversityKunming650500China State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan Yunnan Agricultural UniversityKunming650201China Key Laboratory of Agro-Biodiversity and Pest Management of Education Ministry of China Yunnan Agricultural UniversityKunming650201China Southwest Forestry University Kunming650224China

Compared with the use of monocultures in the field,cultivation of medicinal herbs in forests is an effective strategy to alleviate *** interactions between herbs and trees play an important role in disease suppression in *** evaluated the ability of leachates from needles of Pinus armandii to induce resistance in Panax notoginseng leaves,identified the components via gas chromatography-mass spectrometry(GC-MS),and then deciphered the mechanism of 2,3-Butanediol as the main component in the leachates responsible for resistance induction via RNA sequencing(RNA-seq).Prespraying leachates and 2,3-Butanediol onto leaves could induce the resistance of *** to Alternaria *** RNA-seq results showed that prespraying 2,3-Butanediol onto leaves with or without *** infection upregulated the expression of large number of genes,many of which are involved in transcription factor activity and the mitogen-activated protein kinase(MAPK) signaling ***,2,3-Butanediol spraying resulted in jasmonic acid(JA)-mediated induced systemic resistance(ISR) by activating MYC2 and ***,2,3-Butanediol induced systemic acquired resistance(SAR) by upregulating pattern-triggered immunity(PTI)-and effector-triggered immunity(ETI)-related genes and activated camalexin biosynthesis through activation of ***,2,3-Butanediol from the leachates of pine needles could activate the resistance of *** to leaf disease infection through ISR,SAR and camalexin ***,2,3-Butanediol is worth developing as a chemical inducer for agricultural production.

关键词： Pinus armandii Allelopathy Herbs Induce resistance Diversity Leaf disease

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FPGA控制DDS与AGC的精密信号发生系统研究

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仪表技术与传感器 2019年第1期 55-58,63页

作者：王振瑜吴校生叔晟竹上海交通大学电子信息与电气工程学院微纳电子学系微米纳米加工技术国家级重点实验室上海200240

信号频率分辨率和幅值分辨率是信号发生源性能好坏的重要指标。基于现场可编程门阵列(FPGA)的嵌入式系统,分别采用直接数字合成技术(DDS)和自动增益控制技术(AGC)实现了频率和幅值精密可调的信号发生系统。该信号发生源的频率由FPGA提... 详细信息

信号频率分辨率和幅值分辨率是信号发生源性能好坏的重要指标。基于现场可编程门阵列(FPGA)的嵌入式系统,分别采用直接数字合成技术(DDS)和自动增益控制技术(AGC)实现了频率和幅值精密可调的信号发生系统。该信号发生源的频率由FPGA提供的频率控制字决定。信号发生源的信号幅值由AGC增益控制电压决定,FPGA通过控制DAC的输出模拟量改变增益控制电压。论文设计研究的信号发生系统频率分辨率可达0. 1 Hz,幅值分辨率达0. 1 V。

关键词：信号发生现场可编程门阵列直接数字合成自动增益控制频率分辨率幅值分辨率

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Chiral phosphoramidite ligand-modulated palladium auto-tandem catalysis for asymmetric dehydrogenative dienylation of imines with α-alkenes

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Science China Chemistry 2025年

作者： Zhong-sheng Nong Hao-Fan Qian Ying-Chun Chen Pu-sheng Wang Liu-zhu Gong Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry University of Science and Technology of China Key Laboratory of Drug Targeting and Drug Delivery System (Sichuan University) Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University School of Materials and Chemistry Southwest University of Science and Technology

The development of efficient processes allowing rapid access to complex chiral molecules from easily available alkenes is a long-term pursuit in the synthetic chemistry community. Transition metal-catalyzed asymmetric functionalization of allylic C–H bond represents a unique alternative toward this goal. However, enantioselective dehydrogenative transformation of olefins to value-added optically enriched molecules remains yet to be discovered. Here, we report a highly enantioselective dehydrogenative dienylation of imines with unactivated α-alkenes driven by the synergistic action of palladium complex and carboxylic acid. Chiral phosphoramidite ligands turned out to be superior in modulating the performance of palladium autotandem catalysis and allowed a broad range of α-alkenes and imines to be transformed into chiral dienylamines. Mechanistic studies suggest that the dienes could be in situ generated from α-alkenes through a palladium(0)-mediated dehydrogenative process in the presence of excess benzoquinone oxidants, and then participated in the Pd-chiral phosphoramidite-catalyzed intermolecular vinylogous-type addition to the imines activated by the carboxylic acid co-catalyst. Notably, the second β-H elimination occurring in the dienylation event might be the turnover-limiting step.

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Effect of order–disorder transition on thermodynamic and electronic properties of σ and χ phases in W–Re alloy: the first-principles calculation

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Tungsten 2025年第1期7卷 195-213页

作者： Zhi-Peng zhu Dian Jia William Yi Wang Jun-Lei Yin Xing-Yu Gao shu-Feng Yang Hai-Feng Song Jin-Shan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical University Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The Tungsten-Rhenium(W-Re) alloys,celebrated for their high melting point,strength at elevated temperatures,electrical resistivity,and radiation resistance,have been widely utilized in high-temperature components,aerospace,electronics,and nuclear *** constituents of the topologically close-packed(TCP) phases,the sigma phase(σ) and chi phase(χ) formed within W-Re alloys wield considerable influence on the mechanical properties and the stability of the *** calculations were utilized in the present work to explore the structural,thermodynamic,and electronic properties of both ordered and disordered configurations within the σ and χ phases,culminating in a systematic elucidation of the higher phase stability exhibited by the ordered *** is found that the bulk modulus of these two phases is directly proportional to the concentration of Re in the alloy,while the equilibrium volume is inversely *** thermodynamic parameters of the σ and χ phases are calculated via the mean-field potential *** similar trends observed in the isobaric heat capacity,enthalpy increment,and entropy change curves for these two phases suggest they possess comparable thermodynamic *** is noteworthy that the contribution of ionic vibrations predominantly affects the isobaric heat capacity,while the contribution of thermal electronic excitations increases linearly with *** the structure and thermodynamic properties of TCP phases in W-Re alloys at low temperatures has profound significance for optimizing material performance,microstructures features,establishing theoretical foundations,and predicting material behavior.

关键词： First-principles calculations Phase stability TCP phases Thermodynamic properties W–Re alloy

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Catalytic atroposelective synthesis of indolyl quinazolinones bearing N-N/C-C diaxes

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Science China Chemistry 2025年

作者： Ning-Yi Wang shuo Gao zhu-Di shu Bei-Bei Cheng Chun Ma Yu-Chen Zhang Feng Shi Research Center of Chiral Functional Heterocycles School of Chemistry and Materials Science Jiangsu Normal University School of Petrochemical Engineering Changzhou University School of Chemistry and Chemical Engineering Henan Normal University

The first catalytic atroposelective synthesis of indole derivatives bearing N-N/C-C diaxes has been established by the strategy of de novo ring formation. By this strategy, various indolyl quinazolinones bearing vicinal N-N/C-C diaxes were synthesized in high yields with overall good diastereoselectivities and excellent enantioselectivities via chiral phosphoric acid-catalyzed onepot asymmetric formal (5+1) cycloaddition/oxidation reaction. Moreover, such indolyl quinazolinones bearing vicinal N-N/CC diaxes have good configurational stability and could be converted into new chiral ligands with applications in asymmetric catalysis. Therefore, this work not only offered a new member for the family of diaxial atropisomers, but also provided a powerful strategy for catalytic asymmetric synthesis of atropisomers bearing N-N/C-C diaxes.

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基于FPGA的矢量信号分析系统设计与测试

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传感器与微系统 2019年第1期38卷 75-78页

作者：叔晟竹吴校生王振瑜上海交通大学电子信息与电气工程学院微纳米加工技术国家级重点实验室上海200240

现场可编程门阵列(FPGA)微谐振器等微机电系统(MEMS)器件中,大多处理电路需要同时获取被测信号的幅值和相位信息的要求,提出了一种基于FPGA的矢量信号分析系统完整的设计方案,开发了一种廉价的、便于系统集成的矢量信号分析系统。设计... 详细信息

现场可编程门阵列(FPGA)微谐振器等微机电系统(MEMS)器件中,大多处理电路需要同时获取被测信号的幅值和相位信息的要求,提出了一种基于FPGA的矢量信号分析系统完整的设计方案,开发了一种廉价的、便于系统集成的矢量信号分析系统。设计模块化的硬件电路,利用FPGA程序来实现矢量信号的分析。经过实验测试,获得的矢量信号分析系统具有良好的线性度、高精度、低误差等诸多特性,可以方便、准确地对被测信号进行矢量分析,满足MEMS器件的应用需求。

关键词：微机电系统现场可编程门阵列数字检测矢量信号分析高精度

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三辊滚弯成形过程的回弹研究与试验分析

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塑性工程学报 2017年第5期24卷 44-51页

作者：王艳崔西民许光辉李曙生朱新庆李德蔺上海理工大学机械工程学院上海200093 镇江市锻压机床厂江苏镇江212000 泰州职业技术学院机电技术学院江苏泰州225300

回弹是板材滚弯成形过程中一种不可避免的现象,直接影响着板材的加工精度。为了提高三辊卷板机板材回弹后的成形质量,建立了三辊回弹理论模型,预测了板材回弹后的滚弯成形半径;利用ABAQUS仿真软件分析了滚弯变形区的应力场分布,分析了... 详细信息

回弹是板材滚弯成形过程中一种不可避免的现象,直接影响着板材的加工精度。为了提高三辊卷板机板材回弹后的成形质量,建立了三辊回弹理论模型,预测了板材回弹后的滚弯成形半径;利用ABAQUS仿真软件分析了滚弯变形区的应力场分布,分析了上辊下压量、轧辊与板材间的摩擦力以及多道次滚弯成形对板材回弹的影响规律;通过多道次滚弯试验进行了验证。试验结果表明:随着上辊下压量和摩擦系数的增大,板材回弹量的下降趋势逐渐趋于平缓;多道次滚弯加工降低了板材回弹时的波动,提高了回弹均匀性,板材的成形质量随之提高;相较于多道次滚弯试验,三辊回弹理论模型的最大误差为8.4%,有限元模型的最大误差为6.7%,都具有较高的精度。

关键词：三辊卷板机回弹 ABAQUS 多道次滚弯

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肾上腺海绵状脉管瘤1例

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中国现代医学杂志 2020年第14期30卷 95-96页

作者：朱述圣刘敏侯宇川吉林大学白求恩第一医院泌尿外一科吉林长春130021

1临床资料女性患者,42岁,检查发现左侧肾上腺肿块7 d。肾上腺CT示:左侧肾上腺结合部见一类圆形低密度影,大小约1.4 cm×2.0 cm,CT值11 HU,增强见边缘轻度强化,病灶边缘见点状钙化影(见图1、2)。实验室检验:醛固酮、皮质醇及24 h尿3-甲氧... 详细信息

1临床资料女性患者,42岁,检查发现左侧肾上腺肿块7 d。肾上腺CT示:左侧肾上腺结合部见一类圆形低密度影,大小约1.4 cm×2.0 cm,CT值11 HU,增强见边缘轻度强化,病灶边缘见点状钙化影(见图1、2)。实验室检验:醛固酮、皮质醇及24 h尿3-甲氧基-4-羟基苦杏仁酸均正常。术前诊断为左侧肾上腺腺瘤。手术所见:左侧肾上腺结合部见一类圆形肿块,直径约2 cm,切面为灰黄色,囊内有钙化。术后病理示:左侧肾上腺海绵状脉管瘤,局灶纤维化钙化(见图3)。

关键词：血管瘤,海绵状淋巴管瘤肾上腺肾上腺切除术

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经尿道前列腺电切术后再发急性进展性前列腺癌1例

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中国现代医学杂志 2020年第17期30卷 91-92页

作者：朱述圣王艳波郑琪侯宇川吉林大学第一医院泌尿外一科吉林长春130021

临床资料患者,男性,65岁,间断性肉眼血尿3个月。既往史:经尿道前列腺电切术(transurethral resection of prostate,TURP)后15个月,前列腺特异性抗原(PSA):5.92 ng/ml,确诊为良性前列腺增生。入院后完善辅助检查及检验。输尿管CT显示:双... 详细信息

临床资料患者,男性,65岁,间断性肉眼血尿3个月。既往史:经尿道前列腺电切术(transurethral resection of prostate,TURP)后15个月,前列腺特异性抗原(PSA):5.92 ng/ml,确诊为良性前列腺增生。入院后完善辅助检查及检验。输尿管CT显示:双侧肾上腺肿瘤,考虑转移灶(见图1)。前列腺核磁检查结果:①前列腺癌;②双侧耻骨、坐骨、髋臼多发转移瘤(见图2)。骨显像:双侧耻骨、双侧坐骨、双侧髋臼前列腺癌骨转移。PSA:359 ng/ml。患者行前列腺穿刺活检术,确诊为前列腺癌,HE染色见图3A,免疫组织化学见图3B^D:34βE12(-),P63(-),P504S(+),未行肾上腺穿刺活检。患者使用内分泌治疗(比卡鲁胺+醋酸戈舍瑞林缓释植入剂),近期复查PSA为13.00 ng/ml,状态良好。

关键词：前列腺癌前列腺电切术进展

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Nicotine enhances migration and invasion of human esophageal squamous carcinoma cells which is inhibited by nimesulide

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World Journal of Gastroenterology 2009年第20期15卷 2500-2505页

作者： Ye Zong shu-Tian Zhang sheng-Tao zhu Department of Gastroenterology Beijing Friendship Hospital Affiliated to the Capital Medical University Beijing Digestive Disease Center Beijing 100050 China

AIM： To study the effect of nicotine on the migration and invasion of human esophageal squamous carcinoma cells and to investigate whether nimesulide can inhibit the effect of ***： The esophageal squamous carcinoma cell line （TE-13） was treated with different concentrations of nicotine （100 μg/mL and 200 μg/mL） or 200 μg/mL nicotine plus 100 μmol/L nimesulide. Cell migration and invasion were measured using migration and invasion chamber systems. COX-2 expression was determined by Western blotting. Matrix metalloproteinase-2 （MMP-2） was analyzed by zymography and ***： Nicotine （100 μg/mL, 200 μg/mL） enhanced TE-13 cells migration and invasion, and increased the protein expression of COX-2 and the activity of MMP-2. Nicotine （200 μ/mL） stimulated TE-13 cells migration and invasion which were partly blocked by nimesulide. This was associated with decreased protein expression of COX-2 and decreased activity and protein expression of MMP-2. CONCLUSION： Nicotine enhances the migration and invasion of the esophageal squamous carcinoma cell line, and nimesulide partly blocks the effect ofnicotine-enhanced esophageal squamous carcinoma cell migration and invasion.

关键词： Carcinoma Cyclooxygenase 2 inhibitors Esophagus Nicotine Squamous cell

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