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Recent Advances in Pd-Catalyzed Reactions Involving the “On-Water” Mechanism

Chinese Journal of Chemistry 2024年第5期42卷 533-542页

作者： dong Wei guo-Qiang Lin State Key Laboratory of Systems Medicine for Cancer Shanghai Cancer InstituteShanghai Key Laboratory of Systems Regulation and Clinical Translation for CancerRen Ji HospitalShanghai Jiao Tong University School of MedicineShanghai200127 China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai200032 China

As the chemical industry grapples with the need for more eco-friendly practices,the use of water as a reaction medium is gaining attraction in organic *** mini-review delves into Pd-catalyzed reactions that utilize the "on-water" mechanism,spanning from 2019 to late *** reactions are neatly categorized into several types: (A) Catalytic C—H activations,(B) Mizoroki- Heck-type reactions,(C) Suzuki-Miyaura reactions,and (D) Cyclization *** showcasing the potential of water as a sustainable reaction medium for organic transformations,these reactions leave no doubt about the importance of embracing eco-friendly practices in the chemical *** Scientists In 1980,a seminal work by Breslow et *** an acceleration of reaction rate in the Diels-Alder *** and co-workers noted a significant increase in the rate of the [2σ+2σ+2π] cycloaddition of quadricyclane and dimethyl azodicarboxylate (DMAD) when the reaction was conducted in water,as opposed to when it was carried out in organic *** term "on-water" was then coined to describe this *** strategy was further expanded to transition-metal catalyzed transformations by Ackermann in ***,Varma and Leazer disclosed a Pd-catalyzed Mizoroki-Heck type arylation of alkenes with diaryliodonium salts “on-water”.The enantioselective version of "on-water" process was not realized until 2014 by the Zhou *** on,the Schaub group described a Pd-catalyzed Suzuki–Miyaura coupling reaction of electron-poor aryl chlorides with water,using only 50 ppm of catalyst *** recently,Liu and Lin extended the "on-water" strategy to Pd-catalyzed double Mizoroki-Heck *** mini-review has focused on Pd-catalyzed reactions involving the “on-water” mechanism.

关键词： Pd-catalyzed “On-water” Green chemistry Aqueous reactions Mechanism Methodology and reactions Mizoroki-Heck reaction Cross-coupling

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Finer-scale urban health risk assessment based on the interaction perspective of thermal radiation,human,activity,and space

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Frontiers of Architectural Research 2024年第3期13卷 682-697页

作者： Ruonan guo Fei guo Jing dong Zixuan wang Ruwei Zheng Hongchi Zhang School of Architecture and Fine Art Dalian University of TechnologyDalian 116024China Weifang Natural Resources and Planning Bureau High Tech Branch Weifang 261041China

Urban heat stress profoundly affects the health of ***,current research primarily focuses on quantifying the risk of urban heat based on LST,Ta,etc.,overlooking the crucial and intimate influence of continuous intense solar radiation on human thermal comfort and ***,there is a lack of smaller units to support more precise *** study utilized the radiant heat stress intensity(RHSI)metric concentrating on the intensity and duration of thermal radiation,to develop a thermal-radiation induced health risk(TIHR)assessment *** technologies such as the SOLWEIG model,Python,BERT,and GIS enables precise calculations of 12 spatial indices,including RHSI and Weibo *** facilitates a more accurate assessment of health risks at the smallest urban units(blocks)and directly guides *** application of this workflow in the case of Suoyuwan,Dalian,China,confirms its value,as it can be used to determine which blocks should be prioritized for specific aspects of risk prevention and *** results show that some blocks exhibited differences in TIHR even within close proximity,with disaster-causing factors varying according to *** study proposes a novel assessment framework based on the interactive perspective of thermal radiation-human-activity-space.

关键词： Health risk assessment Thermal radiation Finer-scale Block Planning Human-centered

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Global Dynamic Responses and Progressive Failure of Submerged Floating Tunnel Under Cable Breakage Conditions

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China Ocean Engineering 2024年第4期38卷 676-688页

作者： ZHOU Xiang-bo QIAO dong-sheng wang Ming TANG guo-qiang LU Lin OU Jinping State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

The Submerged Floating Tunnel(SFT)relies on a tensioned mooring system for precise *** sudden breakage of a single cable can trigger an immediate alteration in the constraint conditions of the tube,inducing a transient heave response within the structure along with a transient increase in cable tension experienced by adjacent *** more severe cases,this may even lead to a progressive failure culminating in the global destruction of the *** study used ANSYS/AQWA to establish a numerical model of the entire length SFT for the hydrodynamic response analysis,and conducted a coupled calculation of the dynamic responses of the SFT-mooring line model based on Orca Flex to study the global dynamic responses of the SFT at the moment of cable breakage and the redistribution of cable internal *** most unfavorable position for SFT cable breakage was identified,the influence mechanism of cable breakage at different positions on the global dynamic response was revealed,and the progressive chain failure pattern caused by localized cable breakage are also clarified.

关键词： submerged floating tunnel cable breakage global dynamic responses progressive failure

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The jasmonate pathway promotes nodule symbiosis and suppresses host plant defense in Medicago truncatula

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Molecular Plant 2024年第8期17卷 1183-1203页

作者： Da guo Jingrui Li Peng Liu Yuzhan wang Na Cao Xiangling Fang Tao wang Jiangli dong College of Biological Sciences China Agricultural UniversityBeijing 100193China State Key Laboratory of Plant Environmental Resilience College of Biological SciencesChina Agricultural UniversityBejing 100193China State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhou730020China

Root nodule symbiosis(RNs)between legumes and rhizobia is a major source of nitrogen in agricultural *** symbiosis requires precise regulation of plant defense *** role of the defense hormone jasmonic acid(JA)in the immune response has been extensively *** research shows that JA can play either a positive or negative regulatory role in RNS depending on its concentration,but the molecular mechanisms remain to be *** this study,we found that inoculation with the rhizobia Sm1021 induces the JA pathway in Medicago truncatula,and blocking the JA pathway significantly reduces the number of infection *** in the MtMYc2 gene,which encodes a JA signaling master transcription factor,significantly inhibited rhizobia infection,terminal differentiation,and symbiotic cell *** RNA sequencing and chromatin immunoprecipitation sequencing,we discovered that MtMYc2 regulates the expression of nodule-specific MtDNF2,MtNAD1,and MtSymCRK to suppress host defense,while it activates MtDNF1 expression to regulate the maturation of MtNCRs,which in turn promotes bacteroid *** importantly,MtMYC2 participates in symbiotic signal transduction by promoting the expression of ***,the MtMYC2-MtiPD3 transcriptional regulatory module is specifically present in legumes,and the Mtmyc2 mutants are susceptible to the infection by the pathogen Rhizoctonia ***,these findings reveal the molecular mechanisms of how the JA pathway regulates RNS,broadening our understanding of the roles of JA in plant-microbe interactions.

关键词： jasmonic acid MYC2 symbiosis defense Medicago truncatula

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Copper slag assisted coke reduction of phosphogypsum for sulphur dioxide preparation

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Chinese Journal of Chemical Engineering 2024年第1期65卷 43-53页

作者： dong Ma Qinhui wang State Key Laboratory of Clean Energy Utilization Institute for Thermal Power EngineeringZhejiang UniversityHangzhou 310027China

The reduction of phosphogypsum(PG)to lime slag and SO_(2)using coke can effectively alleviate the environmental problems caused by ***,the PG decomposition temperature remains high and the product yield remains *** adding additives,the decomposition temperature can be further reduced and PG decomposition rate and product yield can be ***,the use of current additives such as Fe_(2)O_(3)and SiO_(2)brings the problem of increasing economic ***,it is proposed to use solid waste copper slag(CS)as a new additive to reduce PG to prepare SO2,which can reduce the cost and meet the environmental benefits at the same *** effects of proportion,temperature and thermostatic time on PG decomposition are investigated by experimental and kinetic analysis combined with FactSage thermodynamic calculations to optimize the roasting ***,the reaction mechanism is *** is found that adding CS to the coke and PG system can increase the rate of PG decomposition and SO_(2)yield while lowering the PG decomposition *** example,when the CS/PG mass ratio increases from 0 to 1,PG decomposition rate increases from 83.38%to 99.35%,SO_(2)yield increases from 78.62%to 96.81%,and PG decomposition temperature decreases from 992.4℃to 949.6℃.The optimal reaction parameters are CS/PG mass ratio of 1,Coke/PG mass ratio of 0.06 at 1100℃for 20 min with 99.35%PG decomposition rate and 96.81%SO_(2) *** process proceeds according to the following reactions:2CaSO_(4)+ 0.7C + 0.8Fe_(2)SiO_(4)→0.8Ca_(2)SiO_(4)+ 0.2Ca_(2)Fe_(2)O_(5)+ 0.4Fe_(3)O_(4)+2SO_(2)+ 0.7CO_(2)Finally,a process for decomposing PG with coke and CS is proposed.

关键词： Phosphogypsum Sulfur dioxide Copper slag Fluidized-bed Reduction Waste treatment

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Integrative analysis of transcriptomic profile reveals potential roles of miRNAs in regulating development of Marsupenaeus japonicas

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Journal of Oceanology and Limnology 2024年第1期42卷 201-215页

作者： Jing wang Longjun PU Xiaojuan ZHANG Cuicui LIANG Dandan dong Jiantao GUAN Huarong guo Ministry of Education Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao 266003China Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao 266003China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China

Regulation of microRNAs(miRNAs)on various biological processes has been a surprising and exciting *** of miRNAs is the first step to comprehensively understand their ***,attempts on global identification and functional verification of miRNAs are very limited in penaeid shrimp Marsupenaeus japonicus,an economically important aquatic *** performing an integrated analysis of transcriptomic profile from gastrula embryos of ***,21conserved miRNAs in ***(mja-miRNAs),belonging to 19 miRNA families,were identified and *** the 21 mja-miRNAs,15 miRNAs were successfully verified to be predominantly expressed in gastrula stage,where they displayed dynamic expression patterns compared with those in naupliuin *** on perfect or near-perfect match to target region,120 target genes were predicted at transcriptome-wide ***,gene ontology(GO)classification and metabolic pathway annotation revealed eight targets that were actively involved in developmental *** the predicted miRNA-mRNA pairs,six targets were then randomly selected and experimentally validated by dual luciferase reporter assay,where three pairs were proved with potential targeting ***,to search for conserved miRNAs potentially involved in early development of ***,we combined in silico and experimental methods,which can be applied in other organisms as *** data implied important roles of miRNAs in the early embryonic development and also suggested the presence of complex miRNA-mRNA functional networks in ***.

关键词： microRNAs(miRNAs) identification Marsupenaeus japonicus embryo transcriptome

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Density functional theory study of B- and Si-doped carbons and their adsorption interactions with sulfur compounds

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Carbon Energy 2024年第2期6卷 195-208页

作者： Peng guo Hong Zhang Shuliang dong Libao An College of Mechanical Engineering North China University of Science and TechnologyTangshanHebeiChina College of Life Sciences North China University of Science and TechnologyTangshanHebeiChina

Understanding the adsorption interactions between carbon materials and sulfur compounds has far-reaching impacts,in addition to their well-known important role in energy storage and conversion,such as lithium-ion *** this paper,properties of intrinsic B or Si single-atom doped,and B-Si codoped graphene(GR)and graphdiyne(GDY)were investigated by using density functional theory-based calculations,in which the optimal doping configurations were explored for potential applications in adsorbing sulfur *** showed that both B or Si single-atom doping and B-Si codoping could substantially enhance the electron transport properties of GR and GDY,improving their surface ***,B and Si atoms displayed synergistic effects for the codoped configurations,where B-Si codoped GR/GDY exhibited much better performance in the adsorption of sulfurcontaining chemicals than single-atom doped *** addition,results demonstrated that,after B-Si codoping,the adsorption energy and charge transfer amounts of GDY with sulfur compounds were much larger than those of GR,indicating that B-Si codoped GDY might be a favorable material for more effectively interacting with sulfur reagents.

关键词： adsorption density functional theory doping graphdiyne graphene sulfur compounds

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Rice AGL1 determines grain size and sterile lemma identity

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The Crop Journal 2024年第2期12卷 630-634页

作者： Haiping Yu An wang Guangheng Zhang guojun dong Longbiao guo Qian Qian Deyong Ren State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006ZhejiangChina Hainan Yazhou Bay Seed Laboratory Sanya 572024HainanChina National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural SciencesSanya 572024HainanChina

The grass spikelet is a unique inflorescence structure that determines grain *** many genetic factors have been well characterized for grain size and glume development,the underlying molecular mechanisms in rice are far from ***,we isolated rice gene,AGL1 that controlled grain size and determines the fate of the sterile *** of function of AGL1 produced larger grains and reduced the size of the sterile *** grains in the agl1 mutant were caused by a larger number of cells that were longer and wider than in the wild *** sterile lemma in the mutant spikelet was converted to a rudimentary glume-like *** findings showed that the AGL1(also named LAX1)protein positively regulated G1 expression,and negatively regulated NSG1 expression,thereby affecting the fate of the sterile *** together,our results revealed that AGL1 played a key role in negative regulation of grain size by controlling cell proliferation and expansion,and supported the opinion that rudimentary glume and sterile lemma in rice are homologous organs.

关键词： Abnormal grain and sterile lemma 1 Oryza sativa Grain size Rudimentary glume

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Sensitivity impacts owing to the variations in the type of zero-range pairing forces on the fission properties using the density functional theory

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Nuclear Science and Techniques 2024年第3期35卷 198-207页

作者： Yang Su Ze-Yu Li Li-Le Liu guo-Xiang dong Xiao-Bao wang Yong-Jing Chen China Nuclear Data Center China Institute of Atomic EnergyBeijing 102413China School of Science Huzhou UniversityHuzhou 313000China

Using the Skyrme density functional theory,potential energy surfaces of^(240)Pu with constraints on the axial quadrupole and octupole deformations(q_(20)and q_(30))were *** volume-like and surface-like pairing forces,as well as a combination of these two forces,were used for the Hartree–Fock–Bogoliubov *** in the least-energy fission path,fission barrier,pairing energy,total kinetic energy,scission line,and mass distribution of the fission fragments based on the different forms of the pairing forces were analyzed and *** fission dynamics were studied based on the timedependent generator coordinate method plus the Gaussian overlap *** results demonstrated a sensitivity of the mass and charge distributions of the fission fragments on the form of the pairing *** on the investigation of the neutron-induced fission of^(239)Pu,among the volume,mixed,and surface pairing forces,the mixed pairing force presented a good reproduction of the experimental data.

关键词： Nuclear fission Density functional theory Pairing force Potential energy surfaces Fission fragment distribution

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Identification of residues in Lassa virus glycoprotein 1 involved in receptor switch

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Virologica Sinica 2024年第4期39卷 600-608页

作者： Jiao guo Yi Wan Yang Liu Xiaoying Jia Siqi dong Gengfu Xiao Wei wang State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China University of the Chinese Academy of Sciences Beijing 100049China The Xi'an Key Laboratory of Pathogenic Microorganism and Tumor Immunity School of Basic MedicineXi'an Medical UniversityXi'an 710021China

Lassa virus(LASV)is an enveloped,negative-sense RNA virus that causes Lassa hemorrhagic *** entry of LASV requires the viral glycoprotein 1(GP1)to undergo a receptor switch from its primary receptor alpha-dystroglycan(α-DG)to its endosomal receptor lysosome-associated membrane protein 1(LAMP1).A conserved histidine triad in LASV GP1 has been reported to be responsible for receptor *** test the hypothesis that other non-conserved residues also contribute to receptor switch,we constructed a series of mutant LASV GP1 proteins and tested them for binding to *** residues,L84,K88,L107,and H170,were identified as critical for receptor *** any of the four residues with the corresponding lymphocytic choriomeningitis virus(LCMV)residue(L84 N,K88E,L10F,and H170S)reduced the binding affinity of LASV GP1 for ***,all mutations caused decreases in glycoprotein precursor(GPC)-mediated membrane fusion at both pH 4.5 and *** infectivity of pseudotyped viruses bearing either GPCL84N or GPCK88E decreased sharply in multiple cell types,while L107F and H170S had only mild effects on *** biolayer light interferometry assay,we found that all four mutants had decreased binding affinity to LAMP1,in the order of binding affinity being L84 N>L107F>K88E>*** four amino acid loci identified for the first time in this study have important reference significance for the in-depth investigation of the mechanism of receptor switching and immune escape of LASV occurrence and the development of reserve anti-LASV infection drugs.

关键词： Lassa virus(LASV) Lysosome-associated membrane protein 1 (LAMP1) Glycoprotein Receptor switch Membrane fusion

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