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Science China Chemistry 2020年第1期63卷 11-15页

作者： wei ou Pei-Qiang Huang Department of Chemistry Fujian Provincial Key Laboratory of Chemical Biology College of Chemistry and Chemical Engineering Xiamen University

Aldehydes are perhaps the most versatile compounds that enable many C-C bond forming reactions,which are not amenable for other subclasses of carbonyl *** report the first use of amides as surrogates of aldehydes for C-C bond formation,namely,the direct Knoevenagel-type condensation based on *** one-pot method consists of controlled reduction of an amide with LDBIPA[LiAlH(iBu)2(OiPr)],Lewis acid-mediated release of a reactive iminium ion intermediate,nucleophilic addition,and in situ elimination of *** reaction shows good functional group *** also demonstrated that the Schwartz reagent could be used as an alternative of *** employment of nitromethane and a silyl enol ether as the nucleophiles opens an avenue for the unprecedented amide-based nitro-aldol condensation reaction and aldol condensation reaction,respectively.

关键词： amides Knoevenagel condensation C–C bond formation one-pot reaction amide transformation

Verifying specifications with associated attributes in graph transformation systems

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Frontiers of Computer Science 2015年第3期9卷 364-374页

作者： Yu ZHou Yankai HUANG ou wei Zhiqiu HUANG College of Computer Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 210016 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China

Graph transformation is an important modeling and analysis technique widely applied in software engineer- ing. The attributes can naturally conceptualize the properties of the modeled artifacts. However, the lack of support for the specification of such attribute correspondence by ordi- nary propositional temporal logics hampers its further appli- cation during verification. Different from the theoretical in- vestigations on quantified second order logics, we propose a practical and light-weight approach for the verification of this kind of temporal specifications with associated attributes. Particularly, we apply our approach and extend the general- purpose graph transformation modeling tool： GROOVE. More- over, symmetry reduction techniques are exploited to reduce the number of states. Experiments with performance evalua- tions complement our discussion and demonstrate the feasi- bility and efficiency of our approach.

关键词： graph grammar software design verification

Recent advances in nature-inspired nanocatalytic reduction of organic molecules with water

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Nano Research 2022年第12期15卷 10292-10315页

作者： Hongli Sun wei ou Like Sun Bo Wang Chenliang Su Institute of Microscale Optoelectronics Shenzhen UniversityInternational Collaboration Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationShenzhen518060China CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China

Nature has provided us the assurance and inspiration for thousands of years in synthesizing value-added chemicals,with the assistance of reactive hydrogen species,and water as the ultimate hydrogen ***,the natural photosynthesis is inefficient due to some intrinsic properties,urging people not only to learn from but also surpass during nature *** this review,we summarized recent progresses on reactive hydrogen species-assisted nanocatalytic reduction of organic molecules towards value-added fine chemicals and pharmaceuticals,with water as the hydrogen source,and especially highlighted how photocatalytically or electrocatalytically evolved reactive hydrogen species synergize with biocatalytic centers and nanocatalytic sites for reduction of organic *** design principles of collaborative semi-artificial systems and nanocatalytic artificial systems,the structure tuning of catalysts for the evolution and utilization of hydrogen species,and the determination of reactive hydrogen species for mechanistic insights were discussed in ***,perspectives were provided for further advancing this emerging area of nanocatalytic reduction of organic molecules from water(or proton)and organics.

关键词： nano-catalysts reactive hydrogen species nature inspiration reduction of organic molecules

On the variable timing behavior of PSR B0540-69:an almost excellent example to study the pulsar braking mechanism

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Research in Astronomy and Astrophysics 2016年第5期16卷 81-86页

作者： Fei-Fei Kou Zi-wei ou Hao Tong Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China

PSR B0540-69 has a braking index measurement in its persistent state： n = 2.129± 0.012. Recently, it has been reported to have changes in its spin-down state： a sudden 36% increase in the spin- down rate. Combining the persistent state braking index measurement with different spin-down states, PSR B0540-69 is more powerful than intermittent pulsars in constraining pulsar spin-down models. The pulsar wind model is applied to explain the variable timing behavior of PSR B0540-69. The braking index of PSR B0540-69 in its persistent state results from the combined effect of magnetic dipole radiation and particle wind. The particle density reflects the magnetospheric activity in real-time and may be responsible for the changing spin-down behavior. Corresponding to the 36% increase in the spin-down rate of PSR B0540-69, the relative increase in the particle density is 88% in the vacuum gap model. The braking index calculated with the model in the new state is n = 1.79. Future observations that measure the braking index of PSR B0540-69 in the new spin-down state will be very powerful in distinguishing between different pulsar spin-down models and different particle acceleration models in the wind braking scenario. The variable timing behavior of PSR J 1846-0258 is also understandable in the pulsar wind model.

关键词： pulsars: general -- pulsars: individual (PSR B0540-69 PSR J 1846-0258) -- stars: neutron-- wind

Responses of nematode communities to different land uses in an aquic brown soil

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Frontiers in Biology 2008年第4期3卷 518-524页

作者： Qi LI Wenju LIANG wei ou Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China Graduate University of Chinese Academy of Sciences Beijing 100049China

An analysis of the seasonal and vertical distribution of soil nematode communities under three contrasting land uses,i.e.,cropland,abandoned cropland and woodland was conducted in an aquic brown *** results showed that different land-use types affected the spatiotemporal distribution of soil nematodes and their dominant genera,and different dominant genera showed different responses to land *** the abandoned cropland and woodland,most dominant genera were present in the 0–20 cm layers and Chiloplacus was mainly distributed in the 5–30 cm layers,while in the cropland,Pratylenchus exhibited an even distribution from the 0–5 cm to the 40–50 cm *** environmental parameters under different land use could influence soil nematodes;soil porosity,total organic C,total N and the C/N ratio could positively influence the abundance of some dominant *** profiles revealed that environmental stability and the homeostasis in the abandoned cropland and woodland lead to higher levels of community structure,and the soil food web tends to succeed to *** faunal analyses are a useful indicator for interpreting the stress and/or nutrient conditions under different land uses.

关键词： soil nematodes dominant genera faunal analysis land use aquic brown soil

Magnetic Inertial Confinement Fusion(MICF)

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Plasma Science and Technology 2016年第11期18卷 1055-1063页

作者： MIAO Feng ZHENG Xianjun DENG Baiquan LIU wei ou wei HUANG Yi Institute of Atomic and Molecular Physics Sichuan University Chengdu 610065 China HOPE Innovations Inc. Ontario L4W0A5 Canada Southwestern Institute of Physics Chengdu 610041 China Southwest University for Nationalities Chengdu 610041 China Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China

t Based on the similarity in models of the early Sun and the 3-D common focal region of the micro-pinch in X-pinch experiments, a novel hybrid fusion configuration by continuous focusing of multiple Z-pinched plasma beams on spatially symmetric plasma is proposed. By replacing gravity with Lorentz force with subsequent centripetal spherical pinch, the beam- target fusion reactivity is enhanced in a quasi-spherical converging region, thus achieving MICF. An assessment, presented here, suggests that a practical fusion power source could be achieved using deuterium alone. Plasma instabilities can be suppressed by fast rotation resulting from an asymmetric tangential torsion in the spherical focal region of this configuration. Mathematical equivalence with the Sun allows the development of appropriate equations for the focal region of MICF, which are solved numerically to provide density, temperature and pressure distributions that produce net fusion energy output. An analysis of MICF physics and a preliminary experimental demonstration of a single beam are also carried out.

关键词： MICF centripetal spherical pinch beam-target enhancement

Tailorable carbazolyl cyanobenzene-based photocatalysts for visible light-induced reduction of aryl halides

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Chinese Chemical Letters 2020年第7期31卷 1899-1902页

作者： wei ou Ru Zou Mengting Han Lei Yu Chenliang Su International Collaborative Laboratory of 2D Materials for Optoelectronic Science&Technology of Ministry of Education Engineering Technology Research Center for 2D Materials Information Functional Devices and Systems of Guangdong ProvinceInstitute of Microscale OptoeletronicsShenzhen UniversityShenzhen 518060China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

Herein,a series of carbazolyl cyanobenzene(CCB)-based organic photocatalysts with a broad range of photoredox capabilities were designed and synthesized,allowing precise control of the photocatalytic reactivity for the controllable reduction of aryl halides via a metal-free *** screened-out CCB(5CzBN),a metal-free,low-cost,scalable and sustainable photocatalyst with both strong oxidative and reductive ability,exhibits superior performance for both dehalogenation and C—C bond-forming arylation reactions.

关键词： Organic photocatalyst Halide C—C bond-formation Photocatalyst Reduction

Neutrophil-to-lymphocyte ratio in sporadic amyotrophic lateral sclerosis

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Neural Regeneration Research 2022年第4期17卷 875-880页

作者： Qian-Qian wei Yan-Bing Hou Ling-Yu Zhang Ru-wei ou Bei Cao Yong-Ping Chen Hui-Fang Shang Department of Neurology Laboratory of Neurodegenerative DisordersWest China HospitalSichuan UniversityChengduSichuan ProvinceChina

The neutrophil-to-lymphocyte ratio(NLR)is considered a robust prognostic biomarker for predicting patient survival outcomes in many ***,it remains unclear whether it can be used as a biomarker for amyotrophic lateral sclerosis(ALS).To correlate NLR with disease progression and survival in sporadic ALS,1030 patients with ALS between January 2012 and December 2018 were included in this *** patients were assigned into three groups according to their NLR values:Group 1(NLRoup 2(NLR=2–3,n=314[30.5%]),and Group 3(NLR>3,n=172[16.7%]).All patients were followed up until April *** in Group 3 had a significantly older onset age,a lower score on the Revised ALS Functional Rating Scale,and rapidly progressing disease ***,faster disease progression rates were associated with higher NLR values(odds ratio=1.211,95%confidence interval[CI]:1.090–1.346,Poups 1 and 2,the survival time in Group 3 was significantly shorter(log-rank P=0.002).The NLR value was considered an independent parameter for the prediction of survival in ALS patients after normalizing for all other potential parameters(hazard ratio[HR]=1.079,95%CI:1.016–1.146,P=0.014).The effects on ALS survival remained significant when adjusted for treatment(HR=1.074,95%CI:1.012–1.141,P_(trend)=0.019)or when considering the stratified NLR value(HR=1.115,95%CI:1.009–1.232,P_(trend)=0.033).Thus,the NLR may help to predict the rate of disease progression and survival in patients with sporadic *** study was approved by the Institutional Ethics Committee of West China Hospital of Sichuan University,China(approval No.2015(236))on December 23,2015.

关键词： amyotrophic lateral sclerosis Cox analysis inflammation lymphocytes monocytes neutrophils prognosis survival rate

Enhancement of corona discharge induced wind generation with carbon nanotube and titanium dioxide decoration

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Chinese Physics B 2019年第9期28卷 282-287页

作者： Jianchun Ye Jun Li Xiaohong Chen Sumei Huang wei ou-Yang Engineering Research Center for Nanophotonics and Advanced Instrument(Ministry of Education) School of Physics and Materials ScienceEast China Normal UniversityShanghai 200062China Department of Electronic Science and Technology Tongji UniversityShanghai 201804China

Dip-coated double-wall carbon nanotubes(DWCNTs) and titanium dioxide(TiO2) sol have been prepared and smeared onto the tip of a conductive iron needle which serves as the corona discharge anode in a needle-cylinder corona *** with the discharge electrode of a CNT-coated needle tip, great advancements have been achieved with the TiO_2/CNT-coated electrode, including higher discharge current, ionic wind velocity, and energy conversion efficiency,together with lower corona onset voltage and power *** parameters related to the discharge have been phenomenologically and mathematically studied for *** to the morphology reorientation of the CNT layer and the anti-oxidation of TiO_2, better performance of corona discharge induced wind generation of the TiO2/CNT-coated electrode system has been *** novel decoration may provide better thoughts about the corona discharge application and wind generation.

关键词： corona discharge induced wind wind velocity carbon nanotubes titanium dioxide

Ascorbic acid secretion in the human stomach and the effect of gastrin

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World Journal of Gastroenterology 2000年第5期6卷 704-708页

作者： Bi Guang Tuo Yong Hui Yan Zheng Long Ge Gang wei ou Kui Zhao Department of Gastroenterology Affiliated HospitalZunyi Medical CollegeZunyi 563003Guizhou ProvinceChina Department of Biochemiology Zunyi Medical CollegeZunyiGuizhou ProvinceChina

AIM To investigate the changes of gastricmucosal ascorbic acid secretion in patients withnonulcer dyspepsia and the effect of gastrin onit,and to relate any observed changes to *** infection and mucosal *** Ascorbic acid secretions in patientswere examined by collecting continuouslygastric juice for one hour after having aspiratedand discarded fasting gastric *** theclearance rate(mL/min)of ascorbic acid fromblood to gastric juice represented ascorbic acidsecretion in the gastric *** acidconcentrations in plasma and juice weremeasured by ferric reduced *** Gastric ascorbic acid secretions ***-positive patients(1.46 mL/min,range0.27-3.78)did not significantly differ fromthose in ***-negative patients(1.25 mL/min,0.47-3.14)(P>0.05).There were nosignificant differences in ascorbic acidsecretions between patients with mild(1.56 mL/min,0.50-3.30),moderate(1.34 mL/min,0.27-2.93)and severe(1.36 mL/min,0.47-3.78)inflammation(P>0.05).There were nosignificant differences in ascorbic acidsecretions between patients without activity(l.45mL/min,0.27-3.14)and with mild(1.32mL/min,0.61-2.93),moderate(1.49mL/min,0.50-3.78)and severe(1.43 mL/min,0.51-3.26)activity of chronic gastritis either(P>0.05).Ascorbic acid secretions in patientswith severe atrophy(0.56 mL/min,0.27-1.20)were markedly lower than those in patientswithout atrophy(1.51 mL/min,0.59-3.30)and with mild(1.43 mL/ min,0.53-3.78)andmoderate(1.31 mL/min,0.47-3.16)atrophy(P<0.005).There was a significant negativecorrelation between ascorbic acid secretion andseverity of atrophy(correlation coefficient=-0.43,P<0.005).After administration ofpentagastrin,ascorbic acid secretions weremarkedly elevated(from 1.39 mL/min,0.36-2.96 to 3.53mL/min,0.84-5.91)(P<0.001).CONCLUSION Ascorbic acid secretion ingastric mucosa is not affected by *** ascorbic acid secretion ismarkedly related to the severity of atrophy,whereas not related to

关键词： gastric mucosa gastrins vitaminc plasma gastric juice Helicobacter pylori