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Berberine inh.bits inflammatory activation of rat brain microglia

Neural Regeneration Research 2010年第18期5卷 1384-1390页

作者： Kyong Nyon Nam Jae-h.ng Kim h.on-Ji Jung Jung-Mi Park Sang-Kwan Moon Young-Suk Kim Sun Yeou Kim eunjoo h. lee Department of Medical Science Graduate School of East-West Medical ScienceKyung Hee University Department of Cardiovascular & Neurologic Diseases (Stroke Center) Hospital of Oriental MedicineKyung Hee University

Ch.onic activation of microglial cells endangers neuronal survival th.ough.th. release of various proinflammatory and neurotoxic factors. Berberine, th. effective ingredient of Coptidis Rh.zoma and Cortex Ph.llodendti, h.s a wide range of ph.rmacological functions, including anti-inflammatory, anti-ath.rosclerotic and anti-cancer effects. Th. neuroprotective potential of berberine h.s previously been demonstrated. Th. present study aimed to examine wh.th.r berberine could repress microglial activation and can be considered a potential th.rapeutic candidate to target neurodegenerative diseases. Primary microglial cells and BV2 microglial cells were cultured and stimulated with.bacterial lipopolysacch.ride （LPS）. Berberine ch.oride was treated prior to LPS or simultaneously with.LPS stimulation. Results revealed th.t berberine was effective at inh.biting nitric oxide release from primary microglial cells wh.n cells were exposed to th. compound prior to LPS or simultaneously with.LPS. It also reduced th. LPS-stimulated production of tumor necrosis factor-α, interleukin-1β, prostaglandin E2, and intracellular reactive oxygen species and nuclear factor-kappa activation. Additionally, berberine reduced nitric oxide release from microglia stimulated with.interferon-γ and amyloid β. Th.se results suggest th.t berberine provides neuroprotection by reducing th. production of various neurotoxic molecules from activated microglia.

关键词： brain inflammation berberine interleukin-1β microglia nuclear factor-kappa nitric oxide prostaglandin tumor necrosis factor-a

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Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.N Ch.kmath.L. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity

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Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mech.nisms

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Journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： h.T.Jeong S.W.lee W.J.Kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deformation mech.nisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm,primarily composed of th. BCCβph.se and a small amount of th. h.Pαph.se,were examined in a temperature range of 473 K to 623 *** microstructural refinement of th.s alloy was ach.eved by employing h.gh.ratio differential speed *** best superplasticity was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were *** th. h.ating and h.lding stage of th. tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider th.s effect wh.n analyzing and understanding th. superplastic deformation beh.vior and *** th. investigated strain rate range,th. superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation climb creep was th. rate-controlling deformation *** was concluded th.t solute drag creep is unlikely to *** th. late stages of deformation at 523 K,it was observed th.t grain boundary sliding led to th. agglomeration of th.αph.se,resulting in significant strain *** mech.nism maps were constructed forβ-Mg-Li alloys in th. form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using th. constitutive equations for various deformation mech.nisms derived based on th. data of th. current tests.

关键词： Magnesium-lith.um alloy Superplasticity Severe plastic deformation Grain size Grain growth

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Editorial for th. Special Issue on Emerging Tech.ology and Advanced Application of Nondestructive Detection for Power Equipment

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Ch.nese Journal of Electrical Engineering 2024年第1期10卷 1-2页

作者： Li J. Mei h. Li S. Tianjin University China Tsingh.a Sh.nzh.n International Graduate Sch.ol China Lanzh.u Jiaotong University China

Th. rapid development of clean and renewable energy tech.ologies represented by wind and solar energy,as well as th. continuous growth.of load demand,h.ve put forward h.gh.r requirements for th. safe operation of th. power *** performance of power equipment based on traditional dielectric materials is often limited by various defects generated during molding,transportation,assembly,and operation,wh.ch.cannot meet th. reliability requirements of power systems in th. new *** detection is an essential tech.ical meth.d in industrial development,wh.ch.can detect and evaluate th. defect and damage status of in-service equipment,key components,and materials with.ut damaging th. object.

关键词： service Application operation

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Black Garlic as an Antiviral for h.rpes Simplex Virus-2 in Lung Cells

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Advances in Bioscience and Biotech.ology 2024年第1期15卷 70-89页

作者： Jenna R. h.rowitz lee h. lee Sandra D. Adams Department of Biology Montclair State University Montclair NJ USA

Allicin, an antioxidant, is known for providing garlic with.its unique fragrance and taste, as well as for its antimicrobial properties. Black garlic, a fermented form of garlic, contains h.gh.r levels of antioxidants th.n fresh.garlic. Antioxidants play a vital role in alleviating cellular stress during viral infections. Viral infections result in oxidative stress th.ough.th. production of reactive oxidative species (ROS). A prolonged state of oxidative stress can result in cell death. DNA damage, and disease progression. In th.s study, black garlic extract (BGE) is evaluated for its ability to mitigate cytopath.c effects and oxidative stress caused by h.rpes simplex virus-2 (h.V-2) infections in vitro. Antiviral assays were performed to determine th. percent of viral inh.bition resulting from treatment with.th. BGE. ROS-GloTM h.sub>2O2 assays were th.n completed to measure th. post-infection ROS levels of BGE-treated virus and cells. Th. results th.s far suggest th.t BGE may inh.bit viral infection and decrease levels of oxidative stress.

关键词： Black Garlic h.rpes Simplex Virus-2 Antioxidant Antiviral Allicin

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Pelleting and particle size reduction of corn increase net energy and digestibility of fiber,protein,and fat in corn-soybean meal diets fed to group-h.used pigs

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Journal of Animal Science and Biotech.ology 2024年第4期15卷 1751-1760页

作者： Su A lee Diego A.Rodriguez Ch.d B.Paulk h.ns h.Stein Department of Animal Sciences University of IllinoisUrbanaIL 61801USA Department of Grain Sciences and Industry Kansas State UniversityManhattanKS 66506USA

Background Reduction of th. particle size of corn increases energy digestibility and concentrations of digestible and metabolizable *** may also reduce particle size of grain,but it is not known if th.re are interactions between particle size reduction and *** objective of th.s experiment was to test th. h.poth.sis th.t particle size reduction and pelleting,separately or in combination,increase N balance,apparent total tract digestibility(ATTD)of fiber and fat,and net energy(NE)in corn-soybean meal diets fed to group-h.used *** Six corn-soybean meal-based diets were used in a 3×2 factorial design with.3 particle sizes of corn(i.e.,700,500,or 300μm)and 2 diet forms(i.e.,meal or pelleted).Pigs were allowed ad libitum access to feed and ***-four castrated male pigs(initial weigh.:29.52 kg;standard diviation:1.40)were allotted to th. 6 diets using a 6×6 Latin square design with.6 calorimeter ch.mbers(i.e.,4 pigs/ch.mber)and 6 *** consumption and CO_(2)and Ch.(4)productions were measured during fed and fasting states and fecal and urine samples were *** Regardless of particle size of corn,th. ATTD of gross energy(GE),N,and acid-h.drolyzed eth.r extract(AEE),and th. concentration of NE were greater(Ph.n in meal *** of diet form,th. ATTD of GE,N,and AEE,and th. concentration of NE were increased(linear;Ph. particle size of corn,but th. increase was greater in meal diets th.n in pelleted diets(interaction;Ph.pelleting and reduction of corn particle size increased nutrient digestibility and NE,but increases were greater in meal diets th.n in pelleted diets.

关键词： Corn Digestibility Feed tech.ology Net energy Particle size Pelleting

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Anti-obesity effects of fucoidan from Sargassum th.nbergii in adipocytes and h.gh.fat diet induced obese mice th.ough.inh.biting adipogenic specific transcription factor

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Food Science and h.man Wellness 2024年第3期13卷 1608-1616页

作者： h.o-Geun lee h.h.A.C.K.Jayawardh.na Fengqi Yang D.P.Nagah.wath.h. N.M.Liyanage Kyung-Mo Song Yun-Sang Ch.i Seung-h.ng lee You-Jin Jeon Min-Ch.ol Kang Department of Marine Life Sciences Jeju National UniversityJeju 63243Republic of Korea Marine Science Institute Jeju National UniversityJeju 63333Republic of Korea Research.Group of Food Processing Korea Food Research InstituteWanju 55365Republic of Korea Department of Ph.rmoceutical Engineering Soonchunhyang UniversityAsan 31538Republic of Korea

Th. prevalence of obesity h.s increased and is a h.alth.concern *** to th. concerns regarding synth.tic anti-obesity treatments,nowadays natural products become a *** studies proved th.t th.re is a potential to use marine algae as anti-obesity ***,in th.s study,th. lipid inh.bitory effect of crude polysacch.ride of amyloglucosidase-assisted h.drolysate from Sargassum th.nbergii(STAC)and its fucoidan fractions(STAFs)on 3T3-L1 cells and h.gh.fat diet(h.D)-induced obese mice were *** to th. results,th. STAF3,sh.wed th. h.gh.st xylose content and exh.bited significant inh.bitory effects on lipid accumulation by downregulating adipogenic and lipogenic proteins in 3T3-L1 ***,oral supplementation with.STAC significantly declined gain in body weigh. and fat weigh.,and serum lipid contents in an h.D-induced obesity mouse *** and ch.mical ch.racterizations demonstrated th.t puritied STAF3 h.s consistent surface morph.logy and small particle size,with.similar structural ch.racteristics as commercial ***,th.se results indicate th.t STAC and purified STAF3 from Sargassum th.nbergia is a potent source to develop as ananti-obesity agents or functional food products to counter obesity.

关键词： Sargassum th.nbergii Fucoidan Anti-obesity Anti-steatosis

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Anticipating th. lifespan: Predicting th. durability of an anode-supported solid oxide fuel cell sh.rt stack over 50,000 h

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Progress in Natural Science:Materials International 2024年第3期34卷 606-613页

作者： Muh.mmad Zubair Kh.n Amjad h.ssain Seung-Bok lee Tak-h.oung Lim Rak-h.un Song Department of Materials Science & Engineering Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology h.drogen Energy Research.Division Korea Institute of Energy Research Department of Advanced Energy and System Engineering Korea University of Science and Technology (UST)

In th. present study, th. operational lifetime of a solid oxide fuel(SOFC) sh.rt stack is predicted by investigating th. performance degradation of both.th. sh.rt stack and its cells th.ough.ut 1000 h.at 800°C. Th. sh.rt stack and integral cell voltages are continuously measured during th. long-term test, with.electroch.mical impedance spectroscopy(EIS) conducted every 200 h. Th. sh.rt stack voltage decreased rapidly for th. initial 200–300 h.and afterwards, it decreased at a slow rate due to th. increase in th. Oh.ic and polarization resistances in th. same manner. Scanning electron microscopy results sh.w th.t th.re is no delamination or cracking among constituent layers of th. sh.rt-stack cells. Th. single degradation effects of th. Ni coarsening in th. anode, cation migration and surface segregation in cath.de and oxide scale growth.in metallic interconnect mesh.are successfully integrated into a compreh.nsive lifetime prediction model. Th. experimentally measured voltage degradation data of th. sh.rt stack fits well with.th. developed math.matical model and allows th. successful prediction of th. lifetime up to 50,000 h.

关键词： Degradation Impedance Lifetime SOFC Stack

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Ph.se-driven progress in nanoph.tonic biosensing

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Ligh.(Science & Applications) 2024年第5期13卷 798-800页

作者： Isabel Barth.h.kh. lee Center for Systems Biology Massachusetts General HospitalHarvard Medical SchoolBostonMA 02114USA

In th. continuous pursuit of enh.ncing th. sensitivity of nanoph.tonic biosensors by leveraging ph.se ph.nomena,a recent development involved th. engineering of an atomically th.n Ge2Sb2Te5 layer on a silver nanofilm ... 详细信息

关键词： silver Ge2Sb2Te5 pursuit

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Durable h.erarch.cal ph.sph.rus‐doped biph.se MoS_(2)electrocatalysts with.enh.nced h.(*)adsorption

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Carbon Energy 2024年第4期6卷 104-114页

作者： Yongteng Qian Jianmin Yu Zh.yi Lyu Qianwen Zh.ng Tae h.eong lee h.an Pang Dae Joon Kang College of Ph.rmacy Jinhua PolytechnicJinhuaZhejiangChina Department of Ph.sics Sungkyunkwan UniversitySuwonGyeonggi‐doRepublic of Korea International Collaborative Laboratory of 2D Materials for Optoelectronic Science and Tech.ology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhenGuangdongChina Sch.ol of Ch.mistry and Ch.mical Engineering Yangzhou UniversityYangzhouJiangsuChina

Ph.se engineering is an efficient strategy for enh.ncing th. kinetics of electrocatalytic ***,ph.se engineering was employed to prepare h.gh.performance ph.sph.rous‐doped biph.se(1T/2h.MoS_(2)(P‐BMS)nanoflakes for h.drogen evolution reaction(h.R).Th. doping of MoS_(2)with.P atoms modifies its electronic structure and optimizes its electrocatalytic reaction kinetics,wh.ch.significantly enh.nces its electrical conductivity and structural stability,wh.ch.are verified by various ch.racterization tools,including X‐ray ph.toelectron spectroscopy,h.gh.resolution transmission electron microscopy,X‐ray absorption near‐edge spectroscopy,and extended X‐ray absorption fine ***,th. h.erarch.cally formed flakes of P‐BMS provide numerous catalytic surface‐active sites,wh.ch.remarkably enh.nce its h.R *** optimized P‐BMS electrocatalysts exh.bit low overpotentials(60 and 72 mV at 10 mA cm^(−2))in h.(2)SO_(4)(0.5 M)and KOh.1.0 M),*** mech.nism of improving th. h.R activity of th. material was systematically studied using density functional th.ory calculations and various electroch.mical ch.racterization *** study h.s sh.wn th.t ph.se engineering is a promising strategy for enh.ncing th. h.adsorption of metal sulfides.

关键词： 1T/2h.MoS_(2) density functional th.ory electrocatalysts ph.se engineering ph.sph.rous doping

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