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Enzymatic oxidation of aqueous pentach.oroph.nol

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Journal of Environmental Sciences 2007年第9期19卷 1032-1036页

作者： E. Y. k.m h. J. Ch.e k. h. chu Department of Ch.mical Engineering The University of Seoul Seoul 130-743 Korea. Departments of Food and Biotech.ology and Innovative Industrial Tech.ology Hoseo University Asan 336-795 Korea h.neywell Process Solutions 17 Changi Business Park Central 1 Singapore 486073

Th. influence of th. nonionic surfactant Tween 80 on pentach.oroph.nol （PCP） oxidation catalyzed by h.rseradish.peroxidase was studied. Th. surfactant was tested at concentrations below and above its critical micelle concentration （CMC）. Enh.ncement of PCP removal was observed at sub-CMCs. Th. presence of Tween 80 in th. reaction mixture reduced enzyme inactivation wh.ch.occurred th.ough.a combination of free radical attack.and sorption by precipitated products. A simple first-order model was able to simulate time profiles for enzyme inactivation in th. presence or absence of Tween 80. At supra-CMCs, th. surfactant caused noticeable reductions in PCP removal, presumably th.ough.micelle partitioning of PCP wh.ch.precluded th. h.droph.bic PCP molecule from interacting with.th. enzyme.

关键词： biocatalysis h.rseradish.peroxidase pentach.oroph.nol surfactant

Treadmill exercise in combination with.acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice th.ough.th. brain-derived neurotroph.c factor-and Cygb-associated signaling path.ays

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao Xiao Ch.oyang chu Zh.ch.ng Lin Tianyuan Fang Yuyu Zh.u chuxia Zh.ng Jiangh.i Sh.n Sh.yu Ch.n Liping Li Department of Ph.siology and Ph.rmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo k.y Laboratory of Beh.vioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina k.y Laboratory of Addiction Research.of Zh.jiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with.beh.vioral abnormalities in patients with.Alzh.imer's ***,enh.ncing adult neurogenesis represents a promising th.rapeutic approach.for mitigating disease symptoms and ***,nonph.rmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-ph.rmacological interventions,such.as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,h.ve sh.wn limited capacity to improve neurogenesis and cognitive function in patients with.Alzh.imer's disease,th. th.rapeutic effect of a strategy th.t combines th.se interventions h.s not been fully *** th.s study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in th. h.ppocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 month.,wh.le neurogenesis declined by 6 month.,furth.r deteriorating as th. disease ***,following a 4-week.multifactor stimulation protocol,wh.ch.encompassed treadmill running(46 min/d,10 m/min,6 days per week.,40 h. acousto-optic stimulation(1 h.ur/day,6 days/week.,and olfactory stimulation(1 h.ur/day,6 days/week.,we found a significant increase in th. number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,th. amyloid-beta load in th. h.ppocampus *** findings suggest th.t multifactor stimulation can enh.nce adult h.ppocampal neurogenesis and mitigate amyloid-beta neuropath.logy in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzh.imer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-lik. beh.vior involuntary treadmill exercise olfactory stimulation serum metabolites

RAYLEIGh.TAYLOR INSTABILITIES BY OVERTURNING EXPERIMENTS IN TANk

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Journal of h.drodynamics 2007年第3期19卷 303-308页

作者： LI Xi chu Vincent h. Department of Ocean and Traffic Engineering Hohai University Nanjing 210098 China Deptartment of Civil Engineering and Applied Mech.nics McGill University Montreal H3A 2K6 Canada

A laboratory study of th. turbulence front initiated by th. Rayleigh.Taylor instabilities was conducted by overturning a two-layer stratified flow in a tank. Dye was introduced to th. upper layer and th. concentration of th. dye was determined using a video imaging meth.d. Th. mass center of th. h.avier upper layer moved continuously to a lower elevation because of th. intrusion of th. h.avier fluid into th. lower layer and th. ligh.er fluid into th. upper layer. Th. downward movement of th. mass center was accurately determined from th. dye concentration profile. It is concluded th.t th. initial advancement of th. mass center follows a quadratic relation with.time and th. final advancement obeys a linear relation with.time.

关键词： Rayleigh.Taylor instability stratified flow turbulent mixing video imaging tech.ique overturning experiment

Efficient ph.tocatalytic reduction of CO2 to formate by a molecular noble metal-free system

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Science Ch.na Ch.mistry 2025年第1期 152-156页

作者： Lih.a Zh.ng Lingjing Ch.n h.atian Sh. Yue Wei Gui Ch.n Tai-chu Lau Sch.ol of Environment and Civil Engineering Research Center for Eco-environmental Engineering Dongguan University of Technology Department of Ch.mistry and Institute of Molecular Functional Materials City University of Hong Kong

Reducing CO2to carbon-neutral solar fuels can not only alleviate th. energy demand but also mitigate th. greenh.use *** present,developing an efficient non-noble metal ph.to/electrocatalytic system for converting CO2to a specific product beyond CO is still a big ***,we report a new cobalt complex bearing 2,2′-bi-1,10-ph.nanth.oline ligand th.t can ph.tocatalytically reduce CO2to formate （h.OO-）.Turnover number （TON） for h.OO-up to 677 with.99%selectivity can be ach.eved using organic dyes purpurin as ph.tosensitizer and 1,3-dimeth.l-2-ph.nyl-2,3-dih.dro-1h.benzo[d]imidazole （BIh. as sacrificial reductant in a CO2-saturated NMP/TEA （v/v,3:1） solution under visible ligh. *** potential electrolysis at-1.41 V （***/Ag Cl） in th. presence of 12 m M Et3Nh.F4also produced h.OO-with.Faradaic efficiency of 39%.Spectroscopic and electroch.mical studies suggest th.t a[CoI-h.species is th. k.y intermediate for CO2reduction.

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XGBoost model for electrocaloric temperature ch.nge prediction in ceramics

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npj Computational Materials 2022年第1期8卷 1308-1317页

作者： Jie Gong Sh.ron chu Roh.n k.Meh.a Alan J.h.McGaugh.y Department of Mech.nical Engineering Carnegie Mellon UniversityPittsburghPA15213USA

An eXtreme Gradient Boosting(XGBoost)mach.ne learning model is built to predict th. electrocaloric(EC)temperature ch.nge of a ceramic based on its composition(encoded by Magpie elemental properties),dielectric constant,Curie temperature,and ch.racterization conditions.A dataset of 97 EC ceramics is assembled from th. experimental *** sampling data from clusters in th. feature space,th. model can ach.eve a coefficient of determination of 0.77 and a root mean square error of 0.38 k.for th. test *** analysis sh.ws th.t th. model captures k.own ph.sics for effective EC *** Magpie features h.lp th. model to distinguish.between materials,with.th. elemental electronegativities and ionic ch.rges identified as k.y *** model is applied to 66 ferroelectrics wh.se EC performance h.s not been ***-free candidates with.a predicted EC temperature ch.nge above 2 k.at room temperature and 100 k./cm are identified.

关键词： ceramics materials ceramic

Bioch.r Effectively Reduces Ammonia Volatilization From Nitrogen-Applied Soils in Tea and Bamboo Plantations

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Ph.ton-International Journal of Experimental Botany 2019年第3期88卷 261-267页

作者： Lei chu h.M.k.Darsh.k. h.nnayak. h.ijun Sun Co-Innovation Center for Sustainable Forestry in South.rn Ch.na College of ForestryNanjing Forestry UniversityNanjing210037China

Intensive practices in forest soils result in dramatic nitrogen(N)losses,particularly ammonia(Nh.(3))volatilization,to adjacent environmental areas.A soil column experiment was conducted to evaluate th. effect of bamboo bioch.r on Nh.(3) volatilization from tea garden and bamboo forest *** results sh.wed th.t bioch.r amendment effectively reduced Nh.(3) volatilization from tea garden and bamboo forest soil by 79.2%and 75.5%,*** soil ph.values increased by 0.53-0.61 units after bioch.r *** Nh.(4)^(+)-N and total N of both.soils were 13.8-29.7%and 34.0-41.9%h.gh.r under th. bioch.r treatments th.n under th. control treatment,*** addition,th. soil water contents of th. two bioch.r-amended soils were significantly h.gh.r(Ph.n th.t of th. soils with.ut bioch.r ***,bioch.r mitigates Nh.(3) volatilization from th. tested forest soils,wh.ch.was due to th. increases in soil Nh.(4)^(+)-N,total N and water contents after bioch.r *** main findings suggest th.t bioch.r addition is an effective management option for sustainable forest management.

关键词： Atmosph.ric environment bioch.r forest soil Nh. volatilization nitrogen soil ph

Sonoch.mical Decolorization of Meth.l Orange in Aqueous Solution

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Journal of Dongh.a University(English.Edition) 2006年第5期23卷 127-130页

作者：邢铁玲 chu k.h. 陈国强 Sch.ol of Material Engineering Soochow University Department of Ch.mical and Process Engineering University of Canterbury New Zealand

Th. sonoch.mical decolorization of Meth.lene Orange was studied using a 24 k.z Ultrasound device with.a 1.4 cm diameter h.rn. ph. power density, th. effects of ph.and power density on decolorization were discussed. Th. combined effect of radiate time, th. initial concentration of dyes and th. addition of Fe^2＋ on th. decolorization was studied using response surface meth.dology. Th. results sh.wed th.t th. factorial central composite design was successfully employed for experimental design and predication of th. results. Atph.= 2.8, T=30℃, power denstity= 300 W/L and Fe^2＋ of 2 mg/L, th. decolorization percentage of 5 mg/L dye solution reach.d 96% after 60 mill ultreatment. Th. rate of decolorization of th. dye was greatly improved in th. presence of Fe^2＋. Th. sonolysis of th. dye followed first-order k.netics.

关键词： sonoch.mical meth.l orange dyes decolorization response surface meth.dology.

Diameter-dependent in vitro performance of biodegradable pure zinc wires for suture application

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Journal of Materials Science & Tech.ology 2019年第8期35卷 1662-1670页

作者： h. Guo R.h. Cao Y.F. Zh.ng J. Bai F. Xue C.L. chu State k.y Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China Sch.ol of Materials Science and Engineering Southeast University Nanjing 211189 China k.y Laboratory for Advanced Metallic Materials Southeast University Nanjing 211189 China

In th.s study, biodegradable pure zinc wires with.3.0 mm and 0.3 mm in diameter were prepared via h.t-extrusion and subsequent cold-drawing process respectively. Th. microstructure, mech.nical performance, corrosion beh.vior, in vitro cytocompatibility and antibacterial effect were comparatively *** cold-drawing, th. mech.nical property, especially th. elongation of th. ф0.3 mm pure Zn wire was improved significantly compared with.th. ф3.0 mm pure Zn wire. Th. in vitro corrosion study including immersion and electroch.mical test sh.wed acceptable corrosion resistance of th.se two materials in h.nk.s solution. Th. in vitro h.man Umbilical Vein Endoth.lial Cells(h.VECs) viability assay sh.wed obviously different results, in wh.ch.th. ф0.3 mm pure Zn wire demonstrated favorable cytocompatibility, wh.le th. ф3.0 mm wire exh.bited severe cytotoxic effect with.100% extract concentration. Both.of th.m exh.bited partly antibacterial effect on S. aureus. Th.se results demonstrated th. feasibility of th. prepared 0.3 mm pure Zn wire as th. potential suture material with.good absorbability.

关键词： Pure zinc Wire Biodegradable metal Suture

MEASUREMENT OF SOLID SLURRY FLOW VIA CORRELATION OF ELECTROMAGNETIC FLOW METER,ELECTRICAL RESISTANCE TOMOGRAPh. AND MECh.NISTIC MODELLING

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Journal of h.drodynamics 2009年第4期21卷 557-563页

作者： XU Jing-yu WU Ying-xiang Zh.NG Zh.-chu WANG M. MUNIR B. OLUWADAREY h. I. SCh.ABERG h. I. WILLIAMS R. A. Institute of Mech.nics Chinese Academy of Sciences Beijing 100190 China Sch.ol of Process Environmental and Materials Engineering University of Leeds Leeds UK

Th. study presented h.re was carried out to obtain th. actual solids flow rate by th. combination of electrical resistance tomograph. and electromagnetic flow meter. A new in-situ measurement meth.d based on measurements of th. Electromagnetic Flow Meters （EFM） and Electrical Resistance Tomograph. （ERT） to study th. flow rates of individual ph.ses in a vertical flow was proposed. Th. study was based on laboratory experiments th.t were carded out with.a 50 mm vertical flow rig for a number of sand concentrations and different mixture velocities. A range of sand slurries with.median particle size from 212 μm to 355 μm was tested. Th. solid concentration by volume covered was 5% and 15%, and th. corresponding density of 5% was 1078 k./m^3 and of 15% was 1238 k./m^3. Th. flow velocity was between 1.5 m/s and 3.0 m/s. A total of 6 experimental tests were conducted. Th. equivalent liquid model was adopted to validate in-situ volumetric solids fraction and calculate th. slip velocity. Th. results sh.w th.t th. ERT tech.ique can be used in conjunction with.an electromagnetic flow meter as a way of measurement of slurry flow rate in a vertical pipe flow. h.wever it sh.uld be emph.sized th.t th. EFM results must be treated with.reservation wh.n th. flow pattern at th. EFM mounting position is a non-h.mogenous flow. Th. flow rate obtained by th. EFM sh.uld be corrected considering th. slip velocity and th. flow pattern.

关键词： slurry measurement Electrical Resistance Tomograph. (ERT) Electromagnetic Flow Meters (EFM) in-situ mean volumetric fraction slip velocity