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姜花精油的成分分析及抗氧化功效研究

中国调味品 2024年第8期49卷 200-204页

作者：孙丽花李永红张艳华刘曼曼郑州卫生健康职业学院郑州450100 郑州大学药学院郑州450100

姜花是一种传统香料植物,被广泛应用在调味品中,其富含精油,这些精油被应用在制药业和化妆业,具有巨大的商业价值。前人大部分的研究集中于姜花花朵精油,对姜花其他部位精油含量的研究相对较少,导致姜花整体植株利用率偏低。该研究基于... 详细信息

姜花是一种传统香料植物,被广泛应用在调味品中,其富含精油,这些精油被应用在制药业和化妆业,具有巨大的商业价值。前人大部分的研究集中于姜花花朵精油,对姜花其他部位精油含量的研究相对较少,导致姜花整体植株利用率偏低。该研究基于此,采用水蒸气蒸馏法对姜花花朵精油、姜花叶片精油和姜花根茎精油进行提取,并分析不同姜花部位化学成分的差异,同时对比姜花不同部位抗氧化活性的差异。研究结果表明,姜花花朵精油的化学成分种类明显高于姜花叶片精油和姜花根茎精油,3种不同姜花部位的精油DPPH自由基清除率并无明显差异。

关键词：姜花精油抗氧化活性开发利用

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近存计算架构AI芯片中子单粒子效应

物理学报 2024年第13期73卷 378-385页

作者：杨卫涛胡志良何欢莫莉华赵小红宋伍庆易天成梁天骄贺朝会李永宏王斌吴龙胜刘欢时光西安电子科技大学微电子学院西安710071 西安交通大学核科学与技术学院西安710049 散裂中子源科学中心东莞523803 空军工程大学航空工程学院西安710000 西安电子科技大学空间科学与技术学院西安710071

利用中国散裂中子源大气中子辐照谱仪,对某款16 nm FinFET工艺制造的近存计算架构人工智能AI芯片进行了大气中子单粒子效应辐照测试研究.辐照测试中,在累积中子注量为1.51×10^(10)n/cm^(2)(1 MeV以上)情况下,共探测到5类共计35个软错误... 详细信息

利用中国散裂中子源大气中子辐照谱仪,对某款16 nm FinFET工艺制造的近存计算架构人工智能AI芯片进行了大气中子单粒子效应辐照测试研究.辐照测试中,在累积中子注量为1.51×10^(10)n/cm^(2)(1 MeV以上)情况下,共探测到5类共计35个软错误,尤其是探测到不同于传统冯诺伊曼架构芯片单粒子效应的计算与存储单元同时发生单粒子效应新现象.基于所探测到的两类功能单元同时单粒子效应新现象,结合蒙特卡罗仿真模拟,初步给出了近存计算架构AI芯片内物理布局上,核心功能单元间可降低同时发生单粒子效应的安全间距建议.该研究为进一步探究非传统冯诺伊曼架构芯片单粒子效应提供了参考与借鉴.

关键词：近存计算 AI芯片散裂中子源大气中子单粒子效应

Binding of Pyrene to Different Molecular Weight Fractions of Dissolved Organic Matter:Effects of Chemical Composition and Steric Conformation

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Chemical Research in Chinese Universities 2012年第4期28卷 624-630页

作者： WU Ji-zhou SUN hong-wen WANG Cui-ping li yong-hong Key Laboratory of Pollution Processes and Environmental Criteria Ministry of EducationCollege of Environmental Science and Engineering State Key Laboratory of Elemento-Organic Chemistry Research Institute of Elemento-Organic ChemistryNankai UniversityTianjin 300071P.R.China

The binding constant（KDOM） of pyrene onto different molecular weight（Mw） fractions of a dissolved organic matter（DOM） extract from an estuarine sediment was measured via a fluorescence quenching method,and the possible binding mechanisms were *** influence of water chemical parameters on pyrene binding was studied to elucidate the effects of DOM steric *** fraction with larger M w（14000） showed a greater KDOM（2.02×10 5） than that with smaller Mw did,and the KDOMs were 1.16×105 and 1.13×105 for the fractions with M w of 1000―14000 and 1000,*** K DOM s of different M w DOM fractions were correlated positively with the atomic ratio of C/H and absorbance at 280 nm;while a negative correlation existed between K DOM and（O＋C）/N（atomic ratio）,and K DOM and O-containing *** correlations indicate the positive influence of aromatic structure and the negative effect of polarity on DOM binding *** spectroscopy revealed that specific interactions existed between pyrene and the DOM fraction with larger M W besides hydrophobic partition,i.e.,NH-π interaction in DOM moiety（1000―14000） and π-π electron donor acceptor（EDA） forces in DOM moiety（14000）.KDOM varied in a complex pattern with increasing cation concentration and pH,which could be explained by the change in DOM steric *** aggregates favored the lipophilic partition of ***,the accessibility to some interior binding sites became low when the aggregate was too large,leading to a reduced KDOM.

关键词： Dissolved organic matter Conformation Water chemistry Pyrene Binding constant

Syntheses and Biological Activities of Ethyl N-Hydroxy-N-(substituted)phenyloxamates as KARI Inhibitors

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Chemical Research in Chinese Universities 2007年第3期23卷 280-283页

作者： WANG Bao-lei li Zheng-ming li yong-hong WANG Su-hua Elemento-Organic Chemistry Institute State-Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China

Nine ethyl N-hydroxy-N-（substituted） phenyloxamates （2a-2i）, based on the structure of the KARI inhibitor IpOHA, were synthesized. Their structures were established on the bases of 1^H NMR, IR, ESI-MS and elemental analyses. Among the nine compounds, four show in vitro inhibitory activity on rice KARI, with 2c and 2g[ Ki values of （35.2±4.9） and （49.4 ±6. 3） μmol/L] having similar activity to the precursor of IpOHA（A, Ki =34. 1±6. 7 μmol/L）. The results will be helpful to further molecular design of more potent KARI inhibitors.

关键词： KARI inhibitor IpOHA Phenyloxamate Synthesis Biological activity

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根系微生物多样性的研究进展

四川生理科学杂志 2024年第1期46卷 231-233页

作者：李永红吴杨卢秋云成都信息工程大学电子工程学院四川成都610225

根系微生物参与土壤生态功能、环境功能和植物免疫功能,是维持植物健康的核心与关键。了解不同微生物的调控机制对有效利用微生物来维持作物健康生长至关重要。植物根系、土壤及微生物构成了一个动态稳定的生态系统,它们相互影响,相互... 详细信息

根系微生物参与土壤生态功能、环境功能和植物免疫功能,是维持植物健康的核心与关键。了解不同微生物的调控机制对有效利用微生物来维持作物健康生长至关重要。植物根系、土壤及微生物构成了一个动态稳定的生态系统,它们相互影响,相互制约。植物根系通过分泌物来选择富集偏好微生物,反过来在植物生长发育过程中土壤微生物也发挥着重要作用,比如利用微生物的抗干旱、解磷、增强植物抵御病原菌等一系列多样性特性来促进植物生长发育。文章主要从根系微生物对魔芋套作的多种特性影响综述了微生物在植物生长发育过程中的作用,为作物设计育种提供重要的理论依据。

关键词：根系微生物土壤生态系统多样性

Quantum chemical study on the thermal rearrangements of HNCRCR'CO

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Chinese Journal of Chemistry 1996年第2期14卷 105-108页

作者： li,yong-hong hong,San-GuoDepartment of Chemistry,Jiangxi Normal University,Nanchang,Jiangxi 330017,China Department of Chemistry Jiangxi Normal University Nanchang Jiangxi 3S0027 China

MINDO/3 molecular orbital theory has been used to study the thermal rearrangements of HNCRCR'*** results obtained show that the activation energy of this rearrangement depends on the migrating group R and the group R'.

关键词： Thermal rearrangement MINDO/3 MO method transition state intrinsic reaction coordinate (IRC)

Synthesis and Herbicidal Activity of Novel 5-Substituted Benzenesulfonylureas

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Chemical Research in Chinese Universities 2007年第6期23卷 674-678页

作者： WANG Mei-yi MU Xiao-li GUO Wan-cheng li yong-hong li Zheng-ming State Key Laboratory of Elemento-Organic Chemistry Research Institute of Elemento-Organic Chemistry Nankai University Tianfin 300071 P. R. China

Sulfonylurea herbicides have been widely used because of their low application rates, good crop sdeetivities and low mammalian toxicities. However, some sulfonylureas might persist unfavourably in the environment with residual problems. In order to look for ecologically safer and environmentally benign sulfonylureas, and on keeping the pyrimidine ring being monosubstitated, 15 novd C5-monosubstituted benzenesulfonylurea compounds were synthesized. The structures of all the compounds synthesized were confirmed by demental analysis and ^1H NMR. Preliminary herbicidal activities of these new sulfonylurea compounds were determined by ALS screening （ in vitro） and pot bioassay experiments（ in vivo）. The herbicidal results show that some novel sulfonylureas are comparable to commercial Foramsulfuron and Monosulfuron.

关键词： Sulfonylurea 5-Substituted phenyl ring Herbicidal activity

Design,Synthesis and Biological Activity of Ethyl 2-(N-Substituted-arylsulfonamido)-2-oxoacetate

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Chemical Research in Chinese Universities 2008年第4期24卷 477-480页

作者： WANG Bao-lei WU Jing HE Feng-qi li yong-hong li Zheng-ming Elemento-Organic Chemistry Institute State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 P. R. China

Thirteen new ethyl 2-（N-substituted-arylsulfonamido）-2-oxoacetates（3a-3m）, based on the structure of Ketol-acid reductoisomerase（KARI） inhibitor IpOHA, were designed and synthesized. Their structures were established on the basis of ^1H NMR, IR, MS, and elemental analyses. The bioassay result reveals that the structural changes from hydroxyl group on the N atom of IpOHA to arylsulfonyl groups does not enhance the inhibitory activity of the compounds to KARI in vitro. Compounds 3c, 3h, 3k, and 3m are more effective than IpOHA against the monocotyledonous bamygrass at 100 ug/mL in herbicidal tests.

关键词： Arylsulfonamide Oxoacetate Synthesis Biological activity

Effect of oxide inclusions on MnS precipitates and tensile mechanical property of high-strength low-alloy steel

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Journal of Iron and Steel Research International 2024年第5期31卷 1210-1220页

作者： Xiao-yong Gao hong Wei li-feng Zhang School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Materials Science and Engineering Yanshan UniversityQinhuangdao066004HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing100144China

The key role of oxide inclusions on the microstructure and mechanical property of a high-strength low-alloy steel was *** field emission scanning electron microscope equipped with energy-dispersive spectrometry was used to characterize MnS *** inclusions play an important role in the shape control of MnS *** oxides fovored to decrease the size and the aspect ratio of MnS *** less oxide inclusions in the steel,approximately over 16.7%MnS precipitates were with aspect ratio a>5 and pure MnS precipitates accounted for 75.9%in ***,with more oxide inclusions in the steel,only 7.4%MnS precipitates were with a>5 and pure MnS precipitates accounted for 60.1%in *** of MnS by oxide inclusions improved the strength and inhibited the *** oxide inclusions in the steel increased the yield strength and tensile strength of the steel in both longitudinal and transverse directions,and lowered the anisotropy of the mechanical property.

关键词： High-strength low-alloy steel MnS Oxide inclusion Mechanical property Anisotropy