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Theoretical Studies on the Intermonomer Interaction of F^(-)·(H_(2)O)_(n)(n=1,2)

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Chinese Journal of Structural Chemistry 2005年第5期24卷 561-567,491页

作者： wang Yong-Cheng LüLing-Ling GENG Zhi-Yuan DAI Guo-Liang wang dong-mei Department of Chemistry Northwest Normal UniversityLanzhou 730070China Department of Chemistry Tianshui Normal UniversityGansu 741009China

Five optimized geometries of F-?(H2O)n (n = 1, 2) were obtained with ab initio calculation at the B3LYP/6-311++G** level. The accurate intermonomer interaction energy was calculated using the MP2 electron correlation correction as well as the basis set superposition error correction by the Boys-Bernardi “counterpoise” protocol. Natural bond orbital (NBO) theory was applied to quantify the relative strength of these interactions and account for their effects on the stability, structural and vibrational parameters of Fˉ?(H2O)n (n = 1, 2). It is shown that the charge transferring from the lone pair of F-1 to the σ?OH(…F) antibonding orbital is important. The results indicate the occupancy of σ?OH(…F) is increased (denoted ?σ?OH(…F)) and the σOH(…F) bond is leng- thened (denoted ?ROH(…F)), leading to the red-shift and the red-shift values have linear correlation with both ?σ?OH(…F) and ?ROH(…F).

关键词： F^(-)·(H_(2)O)_(n)(n=1,2) interaction energy red-shift linear correlation

Quantum Chemistry Study on Dissociation of Oxalyl Bromide

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1334-1339页

作者： GENG Zhi-Yuan wang dong-mei wang Yong-Cheng DAI Guo-Liang LU Ling-Ling wang Han-Qing College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 China Lanzhou Institute of Chemistry and Physics The Chinese Academy of Sciences Lanzhou 730000 China Department of Chemistry Baoji College of Arts ＆ Sci. Baoji 721007 China

The multi-bond dissociation dynamics of oxalyl bromide （（BrCO）2） has been investigated by DFT and CIS calculations. Upon the results, conclusion could be drawn that dissociation of C-Br bond of oxalyl bromide at the ground state （So） is of barfierless. After the absorption of a photon, （BrCO）2 is excited to the first excited state and one of its C-Br bonds is broken to yield Br ·＊ and BrCOCO· ＊ free radicals. In addition, BrCOCO · ＊ with high energy is apt to release energy, and ultimately, turns into BrCOCO ·of the ground state. The energy is adequate for BrCOCO· to break down into Br · and 2CO; at the same time the C-C and C-Br bonds of BrCOCO · free radicals dissociate.

关键词： oxalyl bromide multi-bond dissociation BrCOCO free radical DFT

Infection Behaviour of Melampsora larici-populina on the Leaf Surface of Populus purdomii

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Agricultural Sciences in China 2011年第10期10卷 1562-1569页

作者： YU Zhong-dong PENG Shao-bing REN Zheng-zheng wang dong-mei CAO Zhi-min Forestry College Northwest A＆F University Yangling 712100 P.R.China Science College. Northwest A＆F University Yangling 712100 P.R. China

Behaviours of urediospore germtube in Melampsora larici-populina on the leaf surface of Populus purdomii were studied by light microscope, scanning electron microscope （SEM）, transmission electron microscope （TEM）, and fluorescence microscope. Crab-like fusion cells on leaf surface, intercellular hyphal cells in leaf tissues, as well as nucleus states, were observed and counted up in this study. Under unsaturated humidity, 32% of germinated tubes fused into a distinguishable swollen crab-shaped cell at the merging site, and 10.5% of observed crab-like cells had more than three nuclei. Wedge-shaped mycelia developed and then penetrated the leaf surface directly, or indirectly through stomata. Tips of germtube passed through the intercellular cells of poplar leaves directly were found in TEM. Aniline blue dyeing also showed that the infecting hyphae could invade into the cuticle and epidemic cell wall directly. For the case of infection through stomata, there were two different situations. Short branches and wedge hyphae usually penetrated the leaf surface via opened stomata, whereas, some germtube branches and wedge hyphae penetrated leaves through the guard cell walls or stoma lips. In the latter case, the stomata were always closed. The samples from wild forestlands had the same fused cells and wedge hyphae, but the occurrence rate was much higher than that in the chamber. Even under the saturated air humidity, germtubes could roll back and formed fusion structure, or merged together with their tips. The fusion cells might centralize the plasma of merged germtubes and have a strong survival capacity to protect germtubes from dying under arid circumstances, and provide a chance of genetic variation as well.

关键词： Melampsora larici-populina germtube infection behaviour fusion cell nuclear

Actin and Myosin Co-Localize in Plasmodesmata and Ectodesmata-Like Structure

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Agricultural Sciences in China 2011年第6期10卷 845-849页

作者： dong Yu LIU Na LIU Gang LI Wen-long YAN Ai-hua wang dong-mei College of Life Science Agricultural University of Hebei Baoding 071001 P.R. China

Actin and myosin were found to be associated with the cytoplasmic sleeve of plasmodesmata. As cytoskeletal proteins, actin and myosin are believed to regulate the conductivity of plasmodesmata （PDs） in higher plants. Using immunocytochemical methods, we found the two proteins to be co-localized - and closely linked to each other - in plasmodesmata and ectodesmata-like structure in ageing parenchymatous cells of Allium sativum L. We suggest that intercellular communication is affected by the interaction between actin and myosin.

关键词： actin myosin plasmodesmata ectodesmata-like structure Allium sativum L.

Using 16S rDNA Sequencing Technology to Preliminarily Analyze Intestinal Flora in Children with Mycoplasma pneumoniae Pneumonia

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Biomedical and Environmental Sciences 2022年第6期35卷 528-537页

作者： SHI Da Wei wang dong mei NING Li Hua LI Jing dong Yan ZHANG Zhi Kun DOU Hai Wei WAN Rui Jie JIA Chun mei XIN De LI Department of Pediatrics Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Pediatrics Baotou Fourth Hospital(Baotou Children’s Hospital)Baotou 014030Inner Mongolia Autonomous RegionChina Department of Pediatrics Beijing Chang Ping Hospital of Integrated Chinese and Western MedicineBeijing 100096China Tropical Medicine Research Institute Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China

Objective We investigated changes in the intestinal flora of children with Mycoplasma pneumoniae pneumonia(MPP).Methods Between September 2019 and November 2019,stool samples from 14 children with MPP from The Fourth Hospital of Baotou city,Inner Mongolia Autonomous Region,were collected and divided into general treatment(AF)and probiotic(AFY)groups,according to the treatment of“combined Bifidobacterium,Lactobacillus,Enterococcus,and Bacillus cereus tablets live”.Highthroughput 16S rDNA sequencing was used to identify intestinal *** Intestinal flora abundance and diversity in children with MPP were *** Shannon and Simpson indices were lower in the AF group when compared with healthy controls(P<.05).When compared with healthy controls,the proportion of Enterorhabdus was lower in the AF group,while the proportion of Lachnoclostridium was higher(P<0.05).The proportion of Bifidobacteria and Akkermansia was lower in the AFY group but Enterococcus,Lachnoclostridium,Roseburia,and Erysipelatoclostridium proportions were *** proportion of Escherichia coli-Shigella in the AFY group after treatment was decreased(P<0.05).Conclusions The intestinal flora of children with MPP is disturbed,manifested as decreased abundance and diversity,and decreased *** probiotic mixture partly improved intestinal flora disorders.

关键词： Intestinal flora Mycoplasma pneumoniae pneumonia Probiotics Respiratory tract infection

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Chinese Business Review 2009年第8期8卷 17-25页

作者： wang dong-mei Management School The Graduate University of Chinese Academy of Sciences Beijing 100190 China

In recent years, the academic and practical circles have paid so much attention to similar financial models because they generated a miracle in GOME （Gome Electrical Appliances Holding Limited） and SUNING （Suning Appliance Co., Ltd.） respectively. But what＇s the influence of such a model on corporate profitability and risk？ Are similar financial models free lunches？ To seek for the answers to the above questions, in this paper, we take Gree （GREE Electric Appliances, Inc. of Zhuhai）, Midea （Guangdong Midea Electric Appliances Co. Ltd. Stores） and GOME for examples to carry out a comprehensive and in depth financial analysis. The conclusions of this paper are： The company with similar financial characteristics has higher profitability and risk level; Only the companies which meet special requirements need or can implement such a model and the identification and control of hidden risk can guarantee its success.

关键词： profitability similar financial model supply chain risk

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Journal of Modern Accounting and Auditing 2012年第1期8卷 77-86页

作者： wang dong-mei wang Peng The Graduate University of Chinese Academy of Sciences Beijing China

In this paper, we subdivide the sample of manufacturing companies listed in two stock exchanges in China from the year 2000 to 2009 into two categories： the firms which adopted the similar financial models and those which did not. Then we use t-test and nonparametric test to explore the differences between the two sub-samples in cash management, assets and liabilities structures, assets turnover ratios, profitability, liquidity and growth rates. The results show that the former has shorter Cash Conversion Cycle （CCC）, quicker assets turnover, higher Debt Ratio （DR）, higher growth rate and thus has better profitability. In addition, the regression analysis results further demonstrate that Return on Invested Capital （ROIC） of similar-financial-model firms are positively related to Net Profit Margin （NPM）（p 〈 0.01）, and negatively to CCC （p 〈 0.01）, Interest Expense Ratio （IER）（p 〈 0.01）, the Ratio of Interest-Bearing Debt to Total Liabilities （IBDR）（p 〈 0.01） and the ratio of Net Receivables to Sales Revenue （NRSR）（p 〈 0.01）. Moreover, negative relationship between ROIC and dummy variable GROUP implies that the former has better profitability than the latter.

关键词： manufacturing sector similar financial models profitability liquidity risk

Cooperative Learning in Oral English Classroom Teaching in Higher Vocational Education

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海外英语 2013年第13期 53-54页

作者： wang dong-mei Foreign Language Department Beijing Information Technology College

Cooperative learning in spoken English teaching process occupies an important *** is a relatively new teaching method to provide students with more opportunities to speak English,to reduce the tension of the students,to enhance the enthusiasm of the students to participate in the oral group activities,and to improve the students' English speaking ability *** learning has been widely used in teaching practice,but in spoken English classroom teaching,it is not be used completely.

关键词： cooperative learning spoken English classroom grou

Cultural Contexts and Language Translation

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海外英语 2014年第15期 159-160页

作者： wang dong-mei Foreign Language Department Beijing Information Technology College

According to cognitive linguistics, human language is a process of cognition. Because of the different culture in Eastern and Western, the translation form must adapt to the cultural contexts. This article mainly deals with the differences in intercultural,and discusses the relationship between cultural contexts and language translation.

关键词： intercultural language translation cultural contex