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Design of mg-Zn-Si-ca casting magnesium alloy with high thermal conductivity

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Journal of magnesium and Alloys 2020年第1期8卷 184-191页

作者： V.E.Bazhenov A.V.Koltygin m.c.sung S.H.Park A.Yu.Titov V.A.Bautin S.V.matveev m.V.Belov V.D.Belov K.V.malyutin National University of Science and Technology“mISiS” Leninskiy pr.4Moscow 119049Russia LG Electronics Inc. Yeoui-daeroYeongdeungpo-gu.128LG Twin TowerSeoul 07336 Republic of Korea

magnesium alloys are commonly used to produce lightweight *** most magnesium alloys exhibit low thermal conductivities,high thermal conductivities are needed for electronic *** this study,we attempted to develop new magnesium casting alloys with high thermal *** mg-Zn-Si-ca alloy compositions were chosen using cALPHAD(cALculation of PHAse Diagrams)calculations,and alloy samples were *** fluidity and hot-tearing resistance were *** results indicated that these properties were similar to those of AZ91 *** tests showed that high-pressure die casting could produce mg-Zn-Si-ca alloys possessing mechanical properties 1.5-3 times higher than those produced via sand *** alloy thermal conductivity was 126 W/mK at room *** corrosion rates of the as-cast samples in Nacl/water solutions were two times higher than that of AZ91.

关键词： magnesium alloy Thermal conductivity Phase composition corrosion rate Sand casting High-pressure die casting

microphysiological systems for modeling gut-organ interaction

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BIOcELL 2024年第8期48卷 1145-1153页

作者： sung, Jong Hwan Hongik Univ Dept Chem Engn Seoul South Korea

The gut is a digestive organ that absorbs nutrients but also plays a vital role in immune response and defense against external compounds. The complex interaction between the gut microbiota and other organs including the immune system of the host has been known in various contexts, yielding the notion of 'axes' between the gut and other organs. While the presence of various gut-organ axes has been reported, the lack of adequate in vitro model systems for studying this interaction has restricted a deeper insight into these phenomena. Recently developed microphysiological systems (mPS), also known as organ-on-a-chip, allow researchers to study complex interactions between diverse organs, and here we provide a review of how recently developed gut-on-a-chip systems are used for building models of various diseases that were difficult to study.

关键词： microfluidics Gut-liver axis Gut-brain axis microphysiological systems ON-A-cHIP TOTAL BIOASSAY SYSTEm INTESTINAL-ABSORPTION HEPATIc-mETABOLISm LIVER PLATFORm cOcULTURE INFLAmmATION cAcO-2 DESIGN

crystal structure and luminescence dynamics of highly pure Lim（PO3）3:Eu3+（m=Sr,ca） red phosphors for white light emitting diodes

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Journal of Rare Earths 2024年第8期42卷 1470-1478页

作者： Payal Khajuria m.manhas A.K.Bedyal Ankush Vij H.c.Swart Vinay Kumar Department of Physics and Astronomical Sciences Central University of Jammu Department of Physics School of SciencesCluster University of Jammu Department of Physics University of Petroleum and Energy Studies Department of Physics University of the Free State

Highly pure red phosphors Lim（PO3）3:Eu3+（m=Sr,ca） doped with Eu3+（1 mol%） were synthesized via solution combustion method and their crystal structure and luminescence dynamics were studied to explore its suitability in white light emitting *** Rietveld refinement analysis of the powder Xray diffraction patterns reveals that the phosphors belong to the pure triclinic phase of LiSr（PO3）3and Lica（PO3） with space group P-■（2）.The scanning electron microscopy images showed the agglomerated *** photoluminescence emission spectra under 393 nm show an orange band at 594 nm and a red band at 613 nm ascribed to5D0→7F1.5D0→7F2transitions of Eu3+ion in both the ***,the spectroscopic properties such as luminescence behaviour,and Stark splitting were used to examine the symmetry of Eu3+ions in Lim（PO3）3:Es3+（m=Sr,ca） phosphors in terms of distortion induced upon *** Stark splitting shows that the actual site symmetry for Eu3+ion was estimated to be D2type for both *** photometric properties of Lica（PO3）3:Eu3+such as commission International de l'Eclairage coordinates（x=0.64,y=0.36） near to the standard one（red）,high color purity（95%） and higher brightness reveal that the phosphor has the capability of acting as a red component in n-UV white light emitting diodes.

关键词： Phosphate Photoluminescence Rare earths Stark splitting WLEDs

应用物联网技术加速畜禽精准饲喂:从概念到实施

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Science Bulletin 2024年第14期69卷 2156-2160页

作者：苏家宜谭碧娥蒋宗勇吴德 c.m.Nyachoti sung Woo Kim 印遇龙王婧 Key Laboratory of Hunan Province for the Products Quality Regulation of Livestock and Poultry College of Animal Science and TechnologyHunan Agricultural UniversityChangsha 410128China Institute of Animal Science Guangdong Academy of Agricultural SciencesGuangzhou 510640China Key Laboratory for Animal Disease-Resistant Nutrition of the ministry of Education of china and Animal Nutrition InstituteSichuan Agricultural UniversityChengdu 611130China Department of Animal Science University of ManitobaWinnipeg R3T 2N2Canada Department of Animal Science North Carolina State UniversityRaleigh 27695USA Laboratory of Animal Nutritional Physiology and metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionNational Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry ProductionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410128China Yuelushan Laboratory Changsha 410128China

maximizing sow reproductive performance is vital for ensuring healthy piglet supply,feed efficiency,and profitability,which requires understanding factors such as nutrition,disease control,genetics,herd management,and their *** is well documented that most reproductive issues in sows stem from extreme fluctuations in body reserves[1].Thus,optimizing reproduction should prioritize regulating body reserves and making continuous nutritional adjustments throughout a sow’s life[1,2].However,the traditional one-size-fits-all feeding strategy may not meet individual sow needs under varying *** feeding strategy leads to nutrient under-or over-feeding,which may result in a lack of performance and health issues on the one hand,and economic loss and negative environmental effects on the other.

关键词： feeding extreme reserves

multichannel coupling induced topological insulating phases with full multimerization

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Photonics Research 2024年第3期12卷 491-498页

作者： JUN LI YAPING YANG c-m.HU mOE Key Laboratory of Advanced micro-Structured materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China Department of Physics and Astronomy University of ManitobaWinnipegManitoba R3T 2N2Canada

We propose and experimentally realize a class of quasi-one-dimensional topological lattices whose unit cells are constructed by coupled multiple identical resonators,with uniform hopping and inversion *** the presence of coupling-path-induced effective zero hopping within the unit cells,the systems are characterized by complete multimerization with degenerate-1 energy edge states for open boundary condition.

关键词： symmetry topological coupling

Low crude protein formulation with supplemental amino acids for its impacts on intestinal health and growth performance of growing-finishing pigs

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1590-1606页

作者： marcos Elias Duarte Wanpuech Parnsen Shihai Zhang marvio L.T.Abreu sung Woo Kim Department of Animal Science North Carolina State UniversityRaleighNC 27695USA

Background Low crude protein(cP)formulations with supplemental amino acids(AA)are used to enhance intestinal health,reduce costs,minimize environmental impact,and maintain growth performance of ***,extensive reduction of dietary cP can compromise growth performance due to limited synthesis of non-essential AA and limited availability of bioactive compounds from protein supplements even when AA requirements are ***,implementing a low cP formulation can increase the net energy(NE)content in feeds causing excessive fat *** supplementation of functional AA,coupled with low cP formulation could further enhance intestinal health and glucose metabolism,improving nitrogen utilization,and growth *** experiments were conducted to evaluate the effects of low cP formulations with supplemental AA on the intestinal health and growth performance of growing-finishing *** In Exp.1,90 pigs(19.7±1.1 kg,45 barrows and 45 gilts)were assigned to 3 treatments:cON(18.0%cP,supplementing Lys,met,and Thr),LcP(16.0%cP,supplementing Lys,met,Thr,Trp,and Val),and LcPT(16.1%cP,LcP+0.05%SID Trp).In Exp.2,72 pigs(34.2±4.2 kg BW)were assigned to 3 treatments:cON(17.7%cP,meeting the requirements of Lys,met,Thr,and Trp);LcP(15.0%cP,meeting Lys,Thr,Trp,met,Val,Ile,and Phe);and VLcP(12.8%cP,meeting Lys,Thr,Trp,met,Val,Ile,Phe,His,and Leu).In Exp.3,72 pigs(54.1±5.9 kg BW)were assigned to 3 treatments and fed experimental diets for 3 phases(grower 2,finishing 1,and finishing 2).Treatments were cON(18.0%,13.8%,12.7%cP for 3 phases;meeting Lys,met,Thr,and Trp);LcP(13.5%,11.4%,10.4%cP for 3 phases;meeting Lys,Thr,Trp,met,Val,Ile,and Phe);and LcPG(14.1%,12.8%,11.1%cP for 3 phases;LcP+Glu to match SID Glu with cON).All diets had 2.6 mcal/kg *** In Exp.1,overall,the growth performance did not differ among *** LcPT increased(Pclaudin-1 expression in the duodenum and *** LcP and LcPT increased(PcAT-1,4F2hc,and B0AT exp

关键词： Amino acids Growing-finishing pigs Growth performance Intestinal health Low crude protein formulation Net energy

Soleus arthrogenic muscle inhibition following acute lateral ankle sprain correlates with symptoms and ankle disability but not with postural control

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Journal of Sport and Health Science 2024年第4期13卷 559-568,F0003页

作者： Kyung-min Kim Joo-sung Kim Alan R.Needle Department of Sport Science Sungkyunkwan UniversitySuwon-si 16419Republic of Korea Department of Health and Human Performance Texas State UniversitySan MarcosTX 78666USA Department of Public Health&Exercise Science Appalachian State UniversityBooneNC 28608USA Department of Rehabilitation Science Appalachian State UniversityBooneNC 28608USA

Background:Acute lateral ankle sprains(ALAS)are associated with long-term impairments and instability tied to altered neural *** muscle inhibition(AmI)has been observed in this population;however,relationships with injury-related impairments are unclear,potentially due to the resting,prone position in which AmI is typically *** AmI during bipedal stance may provide a better understanding of this ***:AmI was assessed in 38 young adults(19 ALAS within 72 h of injury:10 males,21.4±2.7 years;19 healthy controls:10 males,21.9±2.2 years;mean±SD)using the Hoffmann reflex(H-reflex)during bipedal *** stimulation was administered to identify the _(max)imal H-reflex(H_(max))and _(max)imal motor response(m_(max))from the soleus,fibularis longus,and tibialis anterior *** primary outcome measure was the H_(max)/m_(max) *** outcomes included acute symptoms(pain and swelling),postural control during bipedal stance,and self-reported ***:No significant group-by-limb interactions were observed for any ***,a significant group main effect was observed in the soleus muscle(F(1,35)=6.82,p=0.013),indicating significantly lower H_(max)/m_(max) ratios following ALAS(0.38±0.20)compared to healthy controls(0.53±0.16).Furthermore,lower H_(max)/m_(max) ratios in the soleus significantly correlated with acute symptoms and self-reported function but not with postural ***:This study supports previous evidence of AmI in patients with ALAS,providing insight into neurophysiologic impacts of musculoskeletal *** results suggest that assessing AmI in a standing position following acute injury may provide valuable insight into how AmI develops and guide potential therapeutic options to curb and offset the formation of joint instability.

关键词： Acute injuries Balance Hoffmann reflex Neural excitability Patient-reported outcomes

comparison of macular changes according to the etiology of optic neuritis:a cross-sectional study

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International Journal of Ophthalmology(English edition) 2024年第4期17卷 686-692页

作者： Yeji moon sung-min Kim Jae Ho Jung Department of Ophthalmology Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 05505Republic of Korea Department of Neurology Seoul National University HospitalSeoul 03080Republic of Korea Department of Ophthalmology Seoul National University HospitalSeoul 03080Republic of Korea Department of Ophthalmology Seoul National University College of MedicineSeoul 03080Republic of Korea

AIm:To compare the macular structure including foveal thickness among patients with optic neuritis(ON)according to the etiology and to investigate the possible correlation between structural and visual outcomes mETHODS:In this retrospective cross-sectional study,the clinical data of patients with aquaporin-4 immunoglobulin G-related ON(AQP4 group,40 eyes),myelin oligodendrocyte glycoprotein IgG-related ON(mOG group,31 eyes),and multiple sclerosis-related ON(mS group,24 eyes)were *** retinal thickness of the foveal,parafoveal and perifoveal regions were *** acuity(VA),visual field index and mean deviation were measured as visual ***:The AQP4 group showed a significantly thinner fovea(226.4±13.4μm)relative to the mOG(236.8±14.0μm,P=0.015)and mS(238.9±14.3μm,P=0.007)*** thickness in the parafoveal area also was thinner in the AQP4 group,though the difference in perifoveal retinal thickness was not *** thickness was correlated with VA in the AQP4 group(coefficientρ=-0.418,P=0.014),but not in the mOG and mS groups(P=0.218 and P=0.138,respectively).There was no significant correlation between foveal thickness and visual field test in all three ***:The significant thinning in the fovea and parafoveal areas in the AQP4 group compared to the mOG and mS groups are ***,macular changes in AQP4-ON show a significant correlation with *** results provide the possibility that retinal structural damage could reflect functional damage in AQP4-ON,distinct from mOGON and mS-ON.

关键词： foveal thickness optic neuritis aquaporin-4 immunoglobulin myelin oligodendrocyte glycoprotein multiple sclerosis

Semi-analytical investigation of heat transfer in a porous convective radiative moving longitudinal fin exposed to magnetic field in the presence of a shape-dependent trihybrid nanofluid

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Applied mathematics and mechanics(English Edition) 2024年第1期45卷 197-216页

作者： c.G.PAVITHRA B.J.GIREESHA m.L.KEERTHI Department of PG Studies and Research in mathematics Kuvempu UniversityShankaraghatta 577451India Department of mathematics and Statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The thermal examination of a non-integer-ordered mobile fin with a magnetism in the presence of a trihybrid nanofluid(Fe_3O_4-Au-Zn-blood) is carried out. Three types of nanoparticles, each having a different shape, are considered. These shapes include spherical(Fe_3O_4), cylindrical(Au), and platelet(Zn) configurations. The combination approach is utilized to evaluate the physical and thermal characteristics of the trihybrid and hybrid nanofluids, excluding the thermal conductivity and dynamic viscosity. These two properties are inferred by means of the interpolation method based on the volume fraction of nanoparticles. The governing equation is transformed into a dimensionless form, and the Adomian decomposition Sumudu transform method(ADSTm) is adopted to solve the conundrum of a moving fin immersed in a trihybrid nanofluid. The obtained results agree well with those numerical simulation results, indicating that this research is reliable. The influence of diverse factors on the thermal overview for varying noninteger values of γ is analyzed and presented in graphical representations. Furthermore, the fluctuations in the heat transfer concerning the pertinent parameters are studied. The results show that the heat flux in the presence of the combination of spherical, cylindrical, and platelet nanoparticles is higher than that in the presence of the combination of only spherical and cylindrical nanoparticles. The temperature at the fin tip increases by 0.705 759% when the value of the Peclet number increases by 400%, while decreases by 11.825 13% when the value of the Hartman number increases by 400%.

关键词： convection radiation moving longitudinal fin Adomian decomposition Sumudu transform method(ADSTm) trihybrid nanofluid magnetic field