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铁基氧化物团簇催化CO还原NO反应模拟

原子与分子物理学报 2025年第6期42卷 22-30页

作者：刘众元孔繁宇陈琳梁五洲刘志兵高义斌国网山西省电力公司电力科学研究院太原030001 太原理工大学太原030024

固定床实验表明,在深度欠氧的条件下,铁基氧化物对CO还原NO的反应具有催化作用.为进一步理解脱销催化反应机理,本文利用量化软件Gaussian模拟了铁及其三种不同价态氧化物团簇:Fe_(2)团簇、Fe_(2)O_(2)团簇、Fe_(2)O_(3)团簇催化CO还原N... 详细信息

固定床实验表明,在深度欠氧的条件下,铁基氧化物对CO还原NO的反应具有催化作用.为进一步理解脱销催化反应机理,本文利用量化软件Gaussian模拟了铁及其三种不同价态氧化物团簇:Fe_(2)团簇、Fe_(2)O_(2)团簇、Fe_(2)O_(3)团簇催化CO还原NO的反应路径,为进一步改进脱硝反应提供理论基础.本文分析了反应过程的各阶段能量壁垒,三种团簇中最容易发生催化反应的团簇为Fe_(2),整个反应过程中的决速步为NO在Fe_(2)团簇上的解离吸附过程.

关键词：铁团簇脱硝模拟反应机理

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Effect of seepage-induced erosion on soil macropore structure

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Journal of Mountain Science 2023年第11期20卷 3402-3422页

作者： HUANG Wen-bo HUANG Da gao yi-kang LIU Yang LI Zhao MENG Qiu-jie School of Civil and Transportation Engineering Hebei University of TechnologyTianjin 300401China. College of Geology Engineering and Geomatics Chang’an UniversityXi’an 710054China.

Internal erosion is one of the important factors causing geological *** microstructure of soil can change with seepage erosion,resulting in changes in the hydraulic and mechanical properties of the *** evolution of seepage erosion is investigated with X-ray computed tomography(CT)in this *** change in macropore structure characteristics during the seepage erosion test is quantified and the influence of seepage erosion on soil deformation is ***,a pore network model(PNM)is established for the specimens and the evolution of the connected pore size characteristics is *** results show that the macropore structure is significantly affected by seepage erosion,especially in terms of the porosity and pore geometry *** changes in macropore structure characteristics are most obvious in the lower part of the *** influence of seepage erosion on the pore size distribution(PSD)and soil deformation is heterogeneous and closely dependent on the spatial location of the ***,seepage erosion enhances macropore connectivity and has a directional impact on macropore *** findings can provide a reference for the theoretical modeling and numerical simulation of the seepage erosion and improve the understanding of the seepage erosion evolution in engineering practice.

关键词： Seepage erosion Heterogeneity Macropore structure Pore size distribution Microstructure CT scanning

Lycopene Accumulation Affects the Biosynthesis of Some Carotenoid-related Volatiles Independent of Ethylene in Tomato

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Journal of Integrative Plant Biology 2008年第8期50卷 991-996页

作者： Hongyan gao Hongliang Zhu yi Shao Anjun Chen Chengwen Lu Benzhong Zhu Yunbo Luo College of Food Science and Nutritional Engineering China Agricultural University Beijing 100083 China

For elucidating the regulatory mechanism of ethylene on carotenoid-related volatiles （open chain） compounds and the relationship between lycopene and carotenoid-related volatiles, transgenic tomato fruits in which ACC synthase was suppressed were used. The transgenic tomato fruit showed a significant reduction of lycopene and aroma volatiles with low ethylene production. 6-methyl-5-hepten-2-one, 6-methyl-5-hepten-2-ol and geranylacetone, which were suspected to be lycopene degradation products, were lower than those in wild type tomato fruits. In order to identify whether lycopene accumulation effects the biosynthesis of some carotenoid-related volatiles independent of ethylene in tomato or not, the capability of both wild type and transgenic tomato fruits discs to convert lycopene into carotenoid-related volatiles was evaluated. The data showed that external lycopene could convert into 6-methyl-5-hepten-2-one and 6-methyl-5-hepten-2-ol in vivo, indicating that the strong inhibition of ethylene production had no effect on enzymes in the biosynthesis pathway of some carotenoid-related volatUes. Therefore, in ACS-suppression transgenic tomato fruits, the low levels of 6-methyl- 5-hepten-2-one, 6-methyl-5-hepten-2-ol was due to decreased lycopene accumulation, not ethylene production. Ethylene only affected the accumulation of lycopene, and then indirectly influenceed the level of lycopene-related volatiles.

关键词： aroma volatiles ethylene lycopene tomato

Overexpression of a modified AM79 aroA gene in transgenic maize confers high tolerance to glyphosate

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Journal of Integrative Agriculture 2015年第3期14卷 414-422页

作者： REN Zhen-jing CAO gao-yi ZHANG Yu-wen LIU Yan LIU Yun-jun Institute of Crop Science Chinese Academy of Agricultural Sciences College of Agriculture and Biotechnology China Agricultural University

It has previously been shown that a bacterial 5-enolpyruvylshikimate-3-phosphate synthase（EPSPS） encoding gene AM79 aroA can be a candidate gene to develop glyphosate-tolerant transgenic crops（Cao et al. 2012）. In this study, AM79 aroA was redesigned using the plant biased codons and eliminating the motifs which would lead to the instability of mRNA, to create a synthetic gene that would be expressed highly in plant cells. The redesigned and artificially synthesized gene, named as mAM79, was cloned into plant expression vector pM3301 Ubi Sp AM79, where mAM79 is fused with signal peptide sequence of pea rib-1,5-bisphospate carboxylase（rbcS） small subunit and controlled by ubiquitin promoter. The plasmid was transformed into maize（Zea mays） immature embryos using Agrobacterium-mediated transformation method. Total 74 regenerated plants were obtained and PCR analysis showed that these transgenic plants had the integration of mAM79. Southern blot analysis was performed on the genomic DNA from four transgenic lines, and the result showed that one or two copies of mAM79 were integrated into maize genome. RT-PCR analysis result indicated that mAM79 was highly transcribed in transgenic maize plants. When sprayed with glyphosate, transgenic maize line AM85 and AM72 could tolerate 4-fold of commercial usage of glyphosate; however, all the non-transgenic maize plants were killed by glyphosate. The results in this study confirmed that mAM79 could be used to develop glyphosate-tolerant maize, and the obtained transgenic maize lines could be used for the breeding of glyphosate-tolerant maize.

关键词： AM79 aroA modify transgenic maize glyphosate tolerance

The efficacy and safety of besifloxacin for acute bacterial conjunctivitis: a Meta-analysis

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International Journal of Ophthalmology(English edition) 2019年第6期12卷 1027-1036页

作者： Jun-Jie Wang Xin-yi gao Hong-Zhuo Li Shan-Shuang Du Changzhi Medical College Changzhi 046000Shanxi ProvinceChina Shaanxi Ophthalmic Medical Center Xi’an No.4 HospitalAffiliated Guangren HospitalSchool of MedicineXi’an Jiaotong UniversityXi’an 710004Shaanxi ProvinceChina Heping Hospital Affiliated to Changzhi Medical College Changzhi 046000Shanxi ProvinceChina

AIM: To evaluate the relative efficacy and safety of besifloxacin for treatment of acute bacterial ***: A comprehensive search in PubMed, EMBASE Web of Science, Cochrane Central Database and CNKI was undertaken for randomized controlled trials(RCTs) comparing besifloxacin with other treatments or placebo. The primary outcome measures were clinical resolution, rates of bacterial eradication, individual clinical outcomes, cure rates, and bacterial eradication rates of different kinds of pathogens. Safety outcomes were the number of adverse effects(AEs). The final search was performed on August ***: Eight RCTs were included. Five studies compared the efficacy and safety of besifloxacin with placebo, 2 studies compared besifloxacin with moxifloxacin, and 1 study compared besifloxacin with gatifloxacin. A total of 3105 patients met the inclusion criteria. Besifloxacin presented higher efficacy and safety than did placebo in clinical resolution, rates of bacterial eradication, individual clinical outcomes, cure rates, bacterial eradication rates of different kinds of pathogens and the number of AEs. There was no significant difference between besifloxacin and moxifloxacin or gatifloxacin in the comparison items mentioned ***: Besifloxacin is highly effective and safe for treatment of acute bacterial conjunctivitis. Further comparative trials regarding the effect of besifloxacin for treatment of acute bacterial conjunctivitis will aid in treatment decisions.

关键词： besifloxacin acute bacterial conjunctivitis Meta-analysis randomized controlled trials

The pentacyclic steroidal constituents of Tacca plantaginea: taccalonolide E and F

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Chinese Journal of Chemistry 1991年第1期9卷 92-94页

作者： SHEN Ji-Hui CHEN Zhong-Liang gao yi-Sheng Shanghai Institute of Materia Medica Academia SinicaShanghai 200031

Two pentacyclic steroidal bitter principles, taccalonolide E and F, have been isolated from Tacca Plantaginea. Their structures were elucidated by spectroscopic methods.

关键词： than taccalonolide E and F The pentacyclic steroidal constituents of Tacca plantaginea

Treating with besifloxacin for acute bacterial conjunctivitis: a Meta-analysis

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International Journal of Ophthalmology(English edition) 2019年第12期12卷 1898-1907页

作者： Jun-Jie Wang Xin-yi gao Hong-Zhuo Li Shan-Shuang Du Changzhi M edical College Changzhi 046000Shanxi ProvinceChina Shaanxi Ophthalmic Medical Center Xi'an No.4 HospitalAffiliated Guangren HospitalSchool of MedicineXi’an Jiaotong UniversityXi'an 710004Shaanxi ProvinceChina Heping Hospital Affiliated to Changzhi Medical College Changzhi 046000Shanxi ProvinceChina

AIM: To evaluate the relative efficacy and safety of besifloxacin for treatment of acute bacterial conjunctivitis. METHODS: A comprehensive search in PubM ed, EMBASE Web of Science, Cochrane Central Database and CNKI was undertaken for randomized controlled trials(RCTs) comparing besifloxacin with other treatments or placebo. The primary outcome measures were clinical resolution, rates of bacterial eradication, individual clinical outcomes, cure rates, and bacterial eradication rates of different kinds of pathogens. Safety outcomes were the number of adverse effects(AEs). The final search was performed on August 2018. RESULTS: Six RCTs were included. Four studies compared the efficacy and safety of besifloxacin with placebo, 1 study compared besifloxacin with moxifloxacin, and 1 study compared besifloxacin with gatifloxacin. A total of 2780 patients met the inclusion criteria. Besifloxacin presented higher efficacy and safety than did placebo in clinical resolution, rates of bacterial eradication, individual clinical outcomes, cure rates, bacterial eradication rates of different kinds of pathogens and the number of AEs. There was no significant difference between besifloxacin and moxifloxacin or gatifloxacin in the comparison items mentioned above. CONCLUSION: Besifloxacin is highly effective and safe for treatment of acute bacterial conjunctivitis. Further comparative trials regarding the effect of besifloxacin for treatment of acute bacterial conjunctivitis will aid in treatment decisions.

关键词： besifloxacin acute bacterial conjunctivitis Meta-analysis randomized controlled trials

The prognostic value of lymphovascular invasion in radical prostatectomy, a systematic review and meta-analysis

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Asian Journal of Andrology 2016年第5期18卷 780-785页

作者： yi Huang Hai Huang Xiu-Wu Pan Dan-Feng Xu Xin-Gang Cui Jie Chen yi Hong yi gao Lei yin Jian-Qing Ye Lin Li Department of Urinary Surgery of Changzheng Hospital Second Military Medical University Shanghai 200003 China Urology Research Center of the Chinese People'sLiberation Army Changzheng Hospital Second Military Medical University Shanghai 200003 China

To systematically evaluate the prognostic value of lymphovascular invasion （LVI） in radical prostatectomy （RP） by a meta-analysis based on the published literature. To identify relevant studies, PubMed, Cochrane Library, and Web of Science database were searched from 1966 to May 2014. Finally, 25 studies （9503 patients） were included. LVI was found in 12.2% （1156/9503） of the RP specimens. LVI was found to be correlated with higher pathological tumor stages （greater than pT3 stage）（risk ratio [RR] 1.90, 95% confidence interval [CI] 1.73-2.08, P〈 0.00001）, higher Gleason scores （greater than GS = 7）（RR 1.30, 95% CI 1.23-1.38, P 〈 0.00001）, positive pathological node （pN） status （RR 5.67, 95% CI 3.14-10.24, P 〈 0.00001）, extracapsular extension （RR 1.72, 95% CI 1.46-2.02, P 〈 0.00001）, and seminal vesicle involvement （RR 3.36, 95% CI 2.41-4.70, P 〈 0.00001）. The pooled hazard ratio （HR） was statistically significant for Biochemical Recurrence-Free （BCR-free） probability （HR 2.05, 95% ／ CI 1.64-2.56; Z = 6.30, P〈 0.00001）. Sensitivity analysis showed that the pooled HR and 95% CI were not significantly altered by the omission of any single study. Begg＇s Funnel plots showed no significant publication bias （P = 0.112）. In conclusion, LVI exhibited a detrimental effect on the BCR-Free probability and clinicopathological features in RP specimens, and may prove to be an independent prognostic factor of BCR.

关键词： lymphovascular invasion meta-analysis prognosis prostate cancer radical prostatectomy

Study of future power interconnection scheme in ASEAN

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Global Energy Interconnection 2019年第6期2卷 550-560页

作者： Han Jiang yi gao Pengfei Xu Jun Li Global Energy Interconnection Development and Cooperation Organization

The current energy supply trajectory in the Association of Southeast Asian Nations(ASEAN)region is not *** such as rising standards of living and demographic patterns,including population growth,lead to continuous increase in power demand,which is difficult to meet using limited fossil fuel ***,a transition toward clean energy sources is needed in the *** ASEAN member countries are rich in clean energy resources,such resources are located far from demand centers;thus,allocation of clean energy is necessary to increase its *** this study,power demand is forecasted using a combination of prediction methods.A model to evaluate the installed capacity and power exchange potential is proposed to deal with mismatch between the location of the clean energy base and the load ***,the concept of cross-regional allocation of clean energy between the ASEAN region,China,and South Asia is presented.A power interconnection scheme among the ASEAN member countries as well as neighboring countries is proposed based on the power exchange *** proposed grid interconnection scheme contributes to the utilization of clean energy in the ASEAN region,increasing the proportion of clean energy in the generation mix,which ensures that the region becomes a sustainable and resilient society with a clean and low carbon development ***,the proposed power interconnection scheme will generate valuable economic,social,environmental,and resource allocation benefits.

关键词： Power intercon nection Power demand In stalled capacity plan ning Power excha nge potential plan ning ASEAN