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Liquid-mediated Ostwald ripening of Ag-based clusters supported on oxides

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Nano Research 2024年第6期17卷 4971-4978页

作者： Conghui liu Rongtan Li Yamei Fan Shiwen Li Xiaohui Feng Lu Feng Yanxiao ning Qiang Fu School of Chemistry Dalian University of TechnologyDalian 116024China State Key Laboratory of Catalysis Chinese Academy of SciencesDalian Institute of Chemical PhysicsDalian 116023China

Reconstruction of supported nanocatalysts often occurs in gas-solid reactions and significantly affects the catalytic performance,yet it is much less explored in liquid-phase ***,we find that highly-dispersed Ag nanocatalysts,i.e.,AgOx clusters,supported on alumina,silica,and titania,can aggregate into larger Ag or Ag2O particles after immersing in liquid-phase media at room *** spontaneous aggregation of AgOx clusters in liquid water is attributed to liquid-phase Ostwald ripening through dissolution of AgOx clusters into water and subsequent redeposition to form Ag2O *** immersion into organic solvents such as ethanol leads to reduction of AgOx clusters and further growth into Ag *** work reveals that liquid-phase reaction media can induce substantial structural evolution of supported nanostructured catalysts,which should be carefully considered in liquid-solid interface catalytic reactions such as electrocatalysis,environmental catalysis,and organic synthesis in liquid phase.

关键词： Ag catalysts Ostwald ripening liquid phase media dissolution-deposition process

METTL3 regulates glucose transporter expression in placenta exposed to hyperglycemia through the mTOR signaling pathway

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Chinese Medical Journal 2024年第13期137卷 1563-1575页

作者： Jie ning Jing Huai Shuxian Wang Jie Yan Rina Su Muqiu Zhang Mengtong liu Huixia Yang Department of Obstetrics and Gynaecology Peking University First HospitalBeijing 100034China Beijing Key Laboratory of Maternal Foetal Medicine of Gestational Diabetes Mellitus Beijing 100034China Peking University Beijing 100034China

Background:Alterations in the placental expression of glucose transporters(GLUTs),the crucial maternal-fetal nutrient transporters,have been found in women with hyperglycemia in pregnancy(HIP).However,there is still uncertainty about the underlying effect of the high-glucose environment on placental GLUTs expression in ***:We quantitatively evaluated the activity of mammalian target of rapamycin(mTOR)and expression of GLUTs(GLUT1,GLUT3,and GLUT4)in the placenta of women with normal pregnancies(CTRL,n=12)and pregnant women complicated with poorly controlled type 2 diabetes mellitus(T2DM,n=12)by *** addition,BeWo cells were treated with different glucose concentrations to verify the regulation of ***,changes in the expression of GLUTs following the activation or suppression of the mTOR pathway were also assessed using MHY1485/rapamycin(RAPA)treatment or small interfering RNA(siRNA)-mediated silencing ***,we further explored the alteration and potential upstream regulatory role of methyltransferase-like 3(METTL3)when exposed to ***:mTOR,phosphorylated mTOR(p-mTOR),and GLUT1 protein levels were upregulated in the placenta of women with T2DM compared with those *** BeWo cells,mTOR activity increased with increasing glucose concentration,and the expression of GLUT1,GLUT3,and GLUT4 as well as GLUT1 cell membrane translocation were upregulated by hyperglycemia to varying *** the drug-mediated and genetic depletion of mTOR signaling in BeWo cells suppressed GLUTs expression,whereas MHY1485-induced mTOR activation upregulated GLUTs ***,high glucose levels upregulated METTL3 expression and nuclear translocation,and decreasing METTL3 levels suppressed GLUTs expression and mTOR activity and vice ***,in METTL3 knockdown BeWo cells,the inhibitory effect on GLUTs expression was eliminated by activating the mTOR signaling pathway using ***:High-g

关键词： Glucose transporters Hyperglycemia Type 2 diabetes mellitus Pregnancy Mammalian target of rapamycin Methyltransferase-like 3

Adrenergic stimulation mediates visceral hypersensitivity to colorectal distension following neonatal colonic inflammation

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Adrenergic stimulation mediates visceral hypersensitivity to...

The endogenous hydrogen sulfide producing enzymes contributes to visceral hypersensitivity to colorectal distension following heterotypic intermittent stress

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Ruo-Bing QU,ning-ang liu,Guang-Yin XU~* Institute of Neuroscience,Key Laboratory of Pain Research & Therapy,Soochow University,Suzhou 215123,China

＜正＞Objective Irritable bowel syndrome（IBS） is a common gastrointestinal disorder characterized by abdominal pain and bloating in association with altered bowel ***,its pathogenesis and the underlying molecular mechanisms of visceral hyperalgesia remain *** therefore investigated whether adrenergic signaling pathway is involved in visceral hyperalgesia at adult induced by neonatal colonic inflammation （NCI）.Methods Visceral hypersensitivity was induced by colonic injection of 0.5%acetic acid（AA,0.2 mL） in 10-day-old *** response to colorectal distension（CRD） was measured by visual observation of abdominal withdrawal reflex（AWR） by a blinded *** NCI significantly increased the visceromoter response to CRD,which started 6 weeks and returned to normal level 12 weeks after neonatal colonic infusion of *** administration of nonselective P-adrenergic receptor antagonist（propranolol） attenuated NCI-induced visceral hypersensitivity in a dose-dependent manner while a-adrenergic receptor antagonist（phentolamine） did not produce any effect in AA-treated *** of propranolol did not produce any effect on AWR scores in healthy rats, indicating that this agent did not act as a non-specific analgesic and that adrenergic system did not normally participate in the responses to *** These data suggest that NCI-induced visceral hypersensitivity is mediated,at least in a large part,by P-adrenergic receptors,thus identifying a specific neurobiological target for the treatment of chronic visceral pain.

关键词： irritable bowel syndrome visceral hyperalgesia adrenergic receptors

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The endogenous hydrogen sulfide producing enzymes contribute...

Phase modulation of nickel-tin alloys in regulating electrocatalytic nitrogen reduction properties

中国神经科学学会第九届全国学术会议暨第五次会员代表大会

作者： Yong-Meng Wang,ning-ang liu,Guang-Yin XU~* Institute of Neuroscience,Key Laboratory of Pain Research & Therapy,Soochow University,Suzhou 215123,China

Objective The pathogenesis of visceral hypersensitivity,a characteristic pathophysiological feature of irritable bowel syndrome(IBS),remains *** studies suggest a role for hydrogen sulfide(HS) in pain signaling but this has not been well studied in animal models of visceral *** therefore determined the role for the endogenous HS producing enzyme cystathionines-synthetase(CBS) and/or cystathionine-γ-lyase (CSE) in a validated rat model of IBS-like chronic visceral hyperalgesia(CVH).Methods Adult(6-8 weeks) male Sprague Dawley rats were subjected to consecutive 9 d of a heterotypical intermittent stress(HIS) protocol comprised of 3 randomly arranged stressors:45 min cold restraint stress(CRS,4℃),20 min forced swimming stress(FSS,water temperature 22℃),and 60 min water avoidance stress(WAS,room temperature 22℃).The perception of painful sensation induced by colorectal distension(CRD) in conscious rats was measured by assessing the abdominal withdrawal reflex(AWR) scores at 6,24,48 and 108 h after termination of last *** inhibitor DL-propargylglycine(PPG) or CBS inhibitor amino-oxyacetate(AOAA) was given *** HIS significantly increased AWR scores responding to CRD starting from 6 h and lasting for 48 h after determination of last *** or AOAA attenuated the AWR scores induced by HIS,in a dose-dependent *** smallest dose for PPG and AOAA to produce maximal inhibitory effect was 50 mg/kg and 8 mg/kg body weight,respectively. Neither PPG nor AOAA produced any effect on AWR scores in normal *** These results suggest that CBS/CSE-HS signaling pathways may play an important role in stress-induced visceral hyperalgesia,thus identifying a potential therapeutic molecule for functional gastrointestinal disorders such as IBS.

关键词： heterotypic intermittent stress visceral hyperalgesia hydrogen sulfite cystathionine-β-synthetase cystathionine-γ-lyase

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Rare Metals 2024年第6期43卷 2851-2858页

作者： Lin Wang Hang-ning liu Xin Meng Chang-Hui Sun Hai-Dong liu Liang-Yu Gong Zhen-Hua Yan Jie Wang College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China Department of Chemistry-angstrom Laboratory Uppsala University75121UppsalaSweden Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Electrocatalytic nitrogen reduction reaction(NRR)is one of the attractive methods for ammonia(NH_(3))production at ambient conditions,but the catalytic performance largely depends on the physical properties of the ***,Ni-Sn alloy nanoparticles with well-controlled physical properties have been synthesized via a simple two-step method,which are applied as efficient electrocatalysts for the NRR.

关键词： alloys alloy nickel

Fast prototype and rapid construction of three-dimensional and multi-scaled pitcher for controlled drainage by systematic biomimicry

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International Journal of Extreme Manufacturing 2024年第3期6卷 489-503页

作者： Tao Shen ning Li Shijie liu Cunlong Yu Chengqi Zhang Kang Yang Xingfei Li Ruochen Fang Lei Jiang Zhichao Dong Research Institute for Frontier Science Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education BeijingSchool of ChemistryBeihang UniversityBeijing 100191People’s Republic of China CAS Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083People’s Republic of China School of Future Technology&School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 101407People’s Republic of China School of Chemistry and Materials Science University of Science and Technology of China230026 HefeiAnhuiPeople’s Republic of China Suzhou Institute for Advanced Research University of Science and Technology of China215123 SuzhouJiangsuPeople’s Republic of China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin University300072 TianjinPeople’s Republic of China

Biomimetic materials that use natural wisdom to solve practical problems are developing *** trend for systematic biomimicry is towards in-situ characterization of naturalcreatures with high spatial ***,rapid reconstruction of digital twin models with the same complex features as the prototype is ***,it faces bottlenecks and limits in fast characterization and fabrication,precise parameter optimization,geometricdeviations control,and quality *** solve these challenges,here,we demonstrate astate-of-the-art method taking advantage of micro-computed tomography and three-dimensional printing for the fast characterization of the pitcher plant Nepenthes x ventrata and fabrication of its biomimetic model to obtain a superior drainage controller with multiscale structures withprecise surface morphology optimization and geometric deviation ***-rupture-based drainage dynamic and mechanisms are characterized by x-ray and high-speed videography,which determines the crucial structures for unique *** the optimized artificial pitchers are further developed into sustained drainage devices with novel applications,such as detection,reaction,and smoke control.

关键词： systematic biomimicry biomimetic materials Micro-CT drainage digital twin

Deformable Catalytic Material Derived from Mechanical Flexibility for Hydrogen Evolution Reaction

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Nano-Micro Letters 2024年第2期16卷 287-311页

作者： Fengshun Wang Lingbin Xie ning Sun Ting Zhi Mengyang Zhang Yang liu Zhongzhong Luo Lanhua Yi Qiang Zhao Longlu Wang College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts&Telecommunications(NJUPT)9 WenyuanNanjing 210023People’s Republic of China Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education School of ChemistryXiangtan UniversityXiangtan 411105People’s Republic of China State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology)Nanjing University of Posts&Telecommunications9 WenyuanNanjing 210023People’s Republic of China

Deformable catalytic material with excellent flexible structure is a new type of catalyst that has been applied in various chemical reactions,especially electrocatalytic hydrogen evolution reaction(HER).In recent years,deformable catalysts for HER have made great progress and would become a research *** catalytic activities of deformable catalysts could be adjustable by the strain engineering and surface *** surface curvature of flexible catalytic materials is closely related to the electrocatalytic HER ***,firstly,we systematically summarized self-adaptive catalytic performance of deformable catalysts and various micro–nanostructures evolution in catalytic HER ***,a series of strategies to design highly active catalysts based on the mechanical flexibility of lowdimensional nanomaterials were *** but not least,we presented the challenges and prospects of the study of flexible and deformable micro–nanostructures of electrocatalysts,which would further deepen the understanding of catalytic mechanisms of deformable HER catalyst.

关键词： Deformable catalytic material Micro-nanostructures evolution Mechanical flexibility Hydrogen evolution reaction

The biochemical behavior and mechanism of uranium(Ⅵ)bioreduction induced by natural Bacillus thuringiensis

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Journal of Environmental Sciences 2024年第2期136卷 372-381页

作者： Shunzhang Chen Junyuan Gong Yanxia Cheng Yuqi Guo Feize Li Tu Lan Yuanyou Yang Jijun Yang ning liu Jiali Liao Key Laboratory of Radiation Physics and Technology of the Ministry of Education Institute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China

For a broader understanding of uranium migration affected by microorganisms in natural anaerobic environment,the bioreduction of uranium(Ⅵ)(U(Ⅵ))was revealed in Bacillus thuringiensis,a dominant bacterium strain with potential of uranium-tolerant isolated from uranium contaminated *** reduction behavior was systematically investigated by the quantitative analysis of U(Ⅳ)in bacteria,and mechanism was inferred from the pathway of electron *** anaerobic conditions,appropriate biomass and sodium lactate as electron donor,reduction behavior of U(Ⅵ)induced by *** was restricted by the activity of lactate dehydrogenase,which was directly affected by the initial pH,temperature and initial U(Ⅵ)concentration of bioreduction *** of U(Ⅵ)was driven by the generation of nicotinamide adenine dinucleotide(NADH)from enzymatic reaction of sodium lactate with various *** transmission of the electrons from bacteria to U(Ⅵ)was mainly supported by the intracellular NADH dehydrogenase-ubiquinone system,this process could maintain the biological activity of cells.

关键词： Uranium Bacillus thuringiensis Bioreduction Electron transmission

Production traits and fertility of reciprocal hybrids between Argopecten irradians irradians and ***

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Journal of Oceanology and Limnology 2024年第1期42卷 304-315页

作者： Jinjing Wang Junhao ning Xia LU Min CHEN Guilong liu Xin XU Quanchao Wang He XU Chunde Wang Research and Development Center for Efficient Utilization of Coastal Bioresources Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China College of Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China University of Chinese Academy of Sciences Beijing 100049China Yantai Spring-Sea AquaSeed Co. Ltd.Yantai 264006China Jiangsu Baoyuan Biotechnology Co. Ltd.Lianyungang 222144China Jiangsu Haitai MariTech Co. Ltd.Lianyungang 222144China

The two bay scallop subspecies,Argopecten irradians irradians(NN)and ***(SS),are fast growing and major cultured bivalves in ***,their relatively small sizes and decreasing production traits caused by long-term inbreeding have been major concerns to the industry in the last two *** between the two bay scallop subspecies may provide a new approach to breed a new variety with superior production traits for the *** this end,in this study,we hybridized the two bay scallop subspecies in order to obtain a new strain that incorporates the genes of both *** significant difference was found in fertilization rate,hatching rate and metamorphosis rate between the purebred and crossbred cohorts(NN♀×SS♂,denoted as NS;SS♀×NN♂,denoted as SN).Both mating strategy(***-population crosses)and egg origin had significant effects on growth and survival at the larval *** was observed in the crossbred and was more pronounced in older *** diversity of the reciprocal hybrids,especially that of SN,was increased compared with the purebred *** all hybrids were completely fertile and able to reproduce by selffertilization or by backcrossing with either ***,male sterile individuals whose gonads were fully occupied by the ovary part at mature stage were found in the hybrids for the first *** hybrids,especially SN,may provide precious germplasm resources for the production of ternary hybrids with the Peruvian scallop,***.

关键词： bay scallop hybridization growth survival heterosis fertility ternary hybrids