The evaluation of toxicity related to polychlorinated dibenzo-p-dioxins and furans(PCDD/Fs)and dioxin-like polychlorinated biphenyls(DL-PCBs)is crucial for a comprehensive risk assessment in real-world exposure scenar...The evaluation of toxicity related to polychlorinated dibenzo-p-dioxins and furans(PCDD/Fs)and dioxin-like polychlorinated biphenyls(DL-PCBs)is crucial for a comprehensive risk assessment in real-world exposure scenarios.This study employed a controlled feeding experiment to investigate the metabolic effects of dioxin-like compounds(DLCs)on laying hens via feed exposure.Diets enriched with two concentrations(1.17 and 5.13 pg toxic equivalents(TEQ)/g dry weight(dw))were administered over 14 days,followed by 28 days of clean feed.Metabolomics analyses of blood samples revealed significant metabolic variations between PCDD/Fs and DL-PCBs exposed groups and controls,reflecting the induced metabolic disruption.Distinct changes were observed in sphingosine,palmitoleic acid,linoleate,linolenic acid,taurocholic acid,indole acrylic acid,and dibutyl phthalate levels,implying possible connections between PCDD/Fs and DL-PCBs toxic effects and energy-neuronal imbalances,along with lipid accumulation and anomalous amino acid metabolism,impacting taurine metabolism.Moreover,we identified three differential endogenous metabolites—L-tryptophan,indole-3-acetaldehyde,and indole acrylic acid—as potential ligands for the aryl hydrocarbon receptor(AhR),suggesting their role inmediating PCDD/Fs and DL-PCBs toxicity.This comprehensive investigation provides novel insights into the metabolic alterations induced by PCDD/Fs and DL-PCBs in laying hens,thereby enhancing our ability to assess risks associated with their exposure in human populations.展开更多
The development of lithium-sulfur batteries(LSBs)is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect.Herein,an N,O co-doped graphene layered...The development of lithium-sulfur batteries(LSBs)is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect.Herein,an N,O co-doped graphene layered block(NOGB)with many dents on the graphene sheets is designed as effective sulfur host for high-performance LSB s.The sulfur platelets are physically confined into the dents and closely contacted with the graphene scaffold,ensuring structural stability and high conductivity.The highly doped N and O atoms can prevent the shuttle effect of sulfur species by strong chemical adsorption.Moreover,the micropores on the graphene sheets enable fast Li^+transport through the blocks.As a result,the obtained NOGB/S composite with 76 wt%sulfur content shows a high capacity of 1413 mAh g^-1 at 0.1 C,good rate performance of 433 mAh g^-1 at 10 C,and remarkable stability with 526 mAh g^-1 at after 1000 cycles at 1 C(average decay rate:0.038%per cycle).Our design provides a comprehensive route for simultaneously improving the conductivity,ion transport kinetics,and preventing the shuttle effect in LSBs.展开更多
The effect of radio-frequency substrate bias on ion properties and sputtering behavior of 2 MHz magnetron discharge was investigated. The ion velocity distribution function(IVDF), the maximum ion energy and ion flux d...The effect of radio-frequency substrate bias on ion properties and sputtering behavior of 2 MHz magnetron discharge was investigated. The ion velocity distribution function(IVDF), the maximum ion energy and ion flux density were measured at the substrate by a retarding field energy analyzer. The sputtering behavior was investigated by the electric characteristics of target and bias discharges using voltage–current probe technique. It was found that the substrate bias led to the decrease of sputtering power, voltage and current with the amplitude <7.5%. The substrate bias also led to the broadening of IVDFs and the increase of ion flux density, made the energy divergent of ions impacting the substrate. This effect was further enhanced by increasing bias power and reducing discharge pressure.展开更多
The pre-ionized 60 MHz very-high-frequency （VHF） magnetron discharge at low pressure, assisted by inductively coupled plasma （ICP） discharge, was developed. The measurement of ion flux density and ion energy to th...The pre-ionized 60 MHz very-high-frequency （VHF） magnetron discharge at low pressure, assisted by inductively coupled plasma （ICP） discharge, was developed. The measurement of ion flux density and ion energy to the substrate was carried out by a retarding field energy analyzer. The electric characteristics of discharge were also investigated by voltage-current probe technique. It was found that by reducing the discharge pressure of VHF magnetron discharge from 5 to 1 Pa, the ion flux density increased about four times, meanwhile the ion energy also increased doubly. The electric characteristics of discharge also showed that a little improvement of sputtering effectiveness was achieved by reducing discharge pressure. Therefore, the deposition property of VHF （60 MHz） magnetron sputtering can be improved by reducing the discharge pressure using the ICP-assisted pre-ionized discharge.展开更多
In this paper,the propagation of Spatholobus suberectus Dunn.was optimized based on the research results conducted in propagation for many years and the actual need for the planting materials.According to the requirem...In this paper,the propagation of Spatholobus suberectus Dunn.was optimized based on the research results conducted in propagation for many years and the actual need for the planting materials.According to the requirements of Good Agricultural Practices for Chinese Medicinal Drugs,cultural practices for propagation of S.suberectus were summed up and standardized,including the environmental requirements,land preparation,bed preparation,cutting of scions,cuttings treatment,cutting,management of cuttings at the nursery,bagged cuttings ready for transplanting,packing and handling,transportation,and preparation of records for archives.展开更多
Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor site.As an alternative,nerve guidance conduit...Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor site.As an alternative,nerve guidance conduits may be used.The ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve regeneration.We designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align them.Subsequently,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber lumen.The presence of aligned fibers on the inner surface can promote the extension of nerve cells along the fibers.The helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide stability.Our novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.展开更多
目的:分析577nm微脉冲激光(SML)光凝联合玻璃体腔注射康柏西普治疗增殖性糖尿病视网膜病变(PDR)患者玻璃体切除术后发生糖尿病性黄斑水肿(DME)的临床效果。方法:回顾性分析2019-01/2021-06就诊于我院经玻璃体切除治疗的PDR患者,术后发生...目的:分析577nm微脉冲激光(SML)光凝联合玻璃体腔注射康柏西普治疗增殖性糖尿病视网膜病变(PDR)患者玻璃体切除术后发生糖尿病性黄斑水肿(DME)的临床效果。方法:回顾性分析2019-01/2021-06就诊于我院经玻璃体切除治疗的PDR患者,术后发生DME患者29例30眼。根据治疗方式不同分为两组,单纯注射组患者14例14眼行玻璃体腔注射康柏西普,联合治疗组患者15例16眼行黄斑区577nm微脉冲激光光凝联合玻璃体腔注射康柏西普。比较两组患者治疗前及治疗6、12mo最佳矫正视力(BCVA)、黄斑中心凹视网膜厚度(CMT)的变化,以及治疗前、治疗12mo多焦视网膜电流图(mfERG)的变化。结果:两组患者治疗6、12mo BCVA(LogMAR)均较术前改善,CMT均较术前下降(均P<0.001)。单纯注射组治疗前及治疗6、12mo BCVA(LogMAR)、CMT与联合治疗组比较均无差异(均P>0.05)。治疗12mo单纯注射组较联合治疗组振幅略低(23.02±3.13 vs 26.50±3.33μV/deg2),潜伏期延长(38.75±1.62 vs 34.21±3.06ms)(均P≤0.001)。随访12mo,单纯注射组注射康柏西普8.14±1.46次,联合治疗组5.05±1.51次(P<0.05)。结论:577nm微脉冲激光光凝联合玻璃体腔注射康柏西普可有效缓解玻璃体切除术后DME患者的黄斑水肿、提高BCVA,并能改善黄斑区视功能,有效减少康柏西普注射次数。展开更多
Effects of solution and aging treatment on the microstructure and mechanical properties of a novel Al-Zn-Mg-Cu alloy by microalloying rare elements Sc and Er were studied.The results show that solution time has a visi...Effects of solution and aging treatment on the microstructure and mechanical properties of a novel Al-Zn-Mg-Cu alloy by microalloying rare elements Sc and Er were studied.The results show that solution time has a visible influence on the microstructure and mechanical properties of the alloy.Specifically,as the solution time increases,the area fraction of the residual phase in the alloy decreases,and the shape of the grain becomes more spheroidal and coarser,leading to a decrease in hardness.This is attributed to the dissolution of strengthening phases during the solution treatment,which weakens the solid solution strengthening effect.The single-stage aging treatment shows an initial increase in strength and hardness of the alloy,followed by a decrease as the aging time is extended,until a steady state is achieved.The optimal single-aging conditions are found to be at 120℃ for 24 h,where the alloy exhibits an excellent combination of high strength and good ductility,with an ultimate tensile strength(UTS)of 523 MPa,yield strength(YS)of 482 MPa,and elongation(El)of 1.75%,respectively.Compared to single-stage aging,double-stage aging(120℃ for 24 h and then 150℃ for 52 h)significantly increases the elongation of the alloy(4.17%),but the UTS reduces to 465.29 MPa,and YS reduces to 410.64 MPa.Transmission electron microscopy(TEM)observations disclose that the grain size,the distribution spacing of precipitates along the grain boundary,and the width of the precipitation-free zone(PFZ)all undergo augmentation as the duration of the second stage aging process elongates.展开更多
AIM: To investigate the activation of autophagy in rat retina after optic nerve crush(ONC) and evaluate its relationship with apoptosis of retinal ganglion cells(RGCs).METHODS: The ONC model was established. Western b...AIM: To investigate the activation of autophagy in rat retina after optic nerve crush(ONC) and evaluate its relationship with apoptosis of retinal ganglion cells(RGCs).METHODS: The ONC model was established. Western blots were performed to investigate expression of p62, LC3 and Beclin-1. Transmission electron microscopy was performed to discover the autophagosomes in the retina after ONC. Immunohistochemistry was used to confirm the distribution of LC3. TUNEL was performed to confirm the relationship between autophagy and RGC apoptosis. RESULTS: p62/Beclin-1 ratio was declined shortly after ONC until to day 7 after ONC and then restored to a normal level at day 21. There was an opposite change in the LC3-II/LC3 I ratio in the retina compared to the p62/Beclin-1 ratio. Increased autophagosomes were found after ONC using transmission electron microscopy, and most of the LC3-stained cells were colocalized with RGCs and Müller cells. More LC3-immunoreactive cells and apoptotic RGCs were found on day 7 following ONC. CONCLUSION: Possible activation of autophagy in RGCs after ONC;autophagy mainly occurred in RGCs and Müller cells, and the apoptosis of RGCs after ONC may be partly associated with autophagic activation.展开更多
A novel orange-red emitting Ba3 Y4 O9：Sm^（3＋） phosphors were prepared by a high temperature solidstate reaction in air. X-ray diffraction（XRD）, photoluminescence spectra, fluorescence decay and temperature-depen...A novel orange-red emitting Ba3 Y4 O9：Sm^（3＋） phosphors were prepared by a high temperature solidstate reaction in air. X-ray diffraction（XRD）, photoluminescence spectra, fluorescence decay and temperature-dependent emission spectra were utilized to characterize the structure and luminescence properties. The results show that the excitation spectrum includes a series of linear peaks at350, 367, 382, 410, 424, 445, 470 and 495 nm, respectively. Under 410 nm excitation, the emission peaks were located at 574 nm（~4 G（5/2）-~6 H（5/2））, 608 nm（~4 G（5/2）-~6 H（7/2））,659 nm（~4 G（5/2）-~6 H（9/2）） and722 nm（~4 G（5/2）-~6 H（11/2））, respectively. The concentration quenching occurs when x equals 0.08 for Ba3 Y（4-x）O9：xSm^（3＋） phosphor and its mechanism is ascribed to the dipole-dipole interaction. The chromaticity coordinates of Ba3 Y（3.92）O9：0.08 Sm^（3＋） phosphor are in the orange-red region. The temperature-dependent study shows that this phosphor has excellent luminescence thermal-stability.And the luminescence intensity of Ba3 Y（3.92）O9：0.08 Sm^（3＋） phosphor at 473 K only declines by about25.75% of its initial intensity. The experimental data indicate that Ba3 Y4 O9：Sm^（3＋） phosphor may be promising as an orange-red emitting phosphor for white light emitting diodes.展开更多
基金supported by the National Key Research and Development Program of China (Nos.2018YFA0901101,2018YFA0901103,and 2017YFC1600301)the National Natural Science Foundation of China (Nos.22076216,21976201,and 21836004).
文摘The evaluation of toxicity related to polychlorinated dibenzo-p-dioxins and furans(PCDD/Fs)and dioxin-like polychlorinated biphenyls(DL-PCBs)is crucial for a comprehensive risk assessment in real-world exposure scenarios.This study employed a controlled feeding experiment to investigate the metabolic effects of dioxin-like compounds(DLCs)on laying hens via feed exposure.Diets enriched with two concentrations(1.17 and 5.13 pg toxic equivalents(TEQ)/g dry weight(dw))were administered over 14 days,followed by 28 days of clean feed.Metabolomics analyses of blood samples revealed significant metabolic variations between PCDD/Fs and DL-PCBs exposed groups and controls,reflecting the induced metabolic disruption.Distinct changes were observed in sphingosine,palmitoleic acid,linoleate,linolenic acid,taurocholic acid,indole acrylic acid,and dibutyl phthalate levels,implying possible connections between PCDD/Fs and DL-PCBs toxic effects and energy-neuronal imbalances,along with lipid accumulation and anomalous amino acid metabolism,impacting taurine metabolism.Moreover,we identified three differential endogenous metabolites—L-tryptophan,indole-3-acetaldehyde,and indole acrylic acid—as potential ligands for the aryl hydrocarbon receptor(AhR),suggesting their role inmediating PCDD/Fs and DL-PCBs toxicity.This comprehensive investigation provides novel insights into the metabolic alterations induced by PCDD/Fs and DL-PCBs in laying hens,thereby enhancing our ability to assess risks associated with their exposure in human populations.
基金supported by the National Natural Science Foundation of China(Nos.51672055,51972342,51872656,and 51702275)the Taishan Scholar Project of Shandong Province(ts20190922)+3 种基金the Key Basic Research Project of Natural Science Foundation of Shandong Province(ZR2019ZD51)the Xinjiang Tianshan Xuesong Project(2018XS28)the Scientific Research Program of the Higher Education Institution of Xinjiang(XJEDU2017S003)the Xinjiang Tianchi Doctoral Project。
文摘The development of lithium-sulfur batteries(LSBs)is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect.Herein,an N,O co-doped graphene layered block(NOGB)with many dents on the graphene sheets is designed as effective sulfur host for high-performance LSB s.The sulfur platelets are physically confined into the dents and closely contacted with the graphene scaffold,ensuring structural stability and high conductivity.The highly doped N and O atoms can prevent the shuttle effect of sulfur species by strong chemical adsorption.Moreover,the micropores on the graphene sheets enable fast Li^+transport through the blocks.As a result,the obtained NOGB/S composite with 76 wt%sulfur content shows a high capacity of 1413 mAh g^-1 at 0.1 C,good rate performance of 433 mAh g^-1 at 10 C,and remarkable stability with 526 mAh g^-1 at after 1000 cycles at 1 C(average decay rate:0.038%per cycle).Our design provides a comprehensive route for simultaneously improving the conductivity,ion transport kinetics,and preventing the shuttle effect in LSBs.
基金supported by National Natural Science Foundation of China (Nos. 11675118 and 11275136)
文摘The effect of radio-frequency substrate bias on ion properties and sputtering behavior of 2 MHz magnetron discharge was investigated. The ion velocity distribution function(IVDF), the maximum ion energy and ion flux density were measured at the substrate by a retarding field energy analyzer. The sputtering behavior was investigated by the electric characteristics of target and bias discharges using voltage–current probe technique. It was found that the substrate bias led to the decrease of sputtering power, voltage and current with the amplitude <7.5%. The substrate bias also led to the broadening of IVDFs and the increase of ion flux density, made the energy divergent of ions impacting the substrate. This effect was further enhanced by increasing bias power and reducing discharge pressure.
基金supported by National Natural Science Foundation of China (Nos. 11675118 and 11275136)
文摘The pre-ionized 60 MHz very-high-frequency （VHF） magnetron discharge at low pressure, assisted by inductively coupled plasma （ICP） discharge, was developed. The measurement of ion flux density and ion energy to the substrate was carried out by a retarding field energy analyzer. The electric characteristics of discharge were also investigated by voltage-current probe technique. It was found that by reducing the discharge pressure of VHF magnetron discharge from 5 to 1 Pa, the ion flux density increased about four times, meanwhile the ion energy also increased doubly. The electric characteristics of discharge also showed that a little improvement of sputtering effectiveness was achieved by reducing discharge pressure. Therefore, the deposition property of VHF （60 MHz） magnetron sputtering can be improved by reducing the discharge pressure using the ICP-assisted pre-ionized discharge.
基金Scientific Research and Technology Development Project of Yulin City,Guangxi(Yushikegong 201833050)Guangxi Science and Technology Plan Project(Guike AA18126004)Science and Technology Innovation Platform Establishment Plan Project of Yulin City,Guangxi(2019CXPT00A5).
文摘In this paper,the propagation of Spatholobus suberectus Dunn.was optimized based on the research results conducted in propagation for many years and the actual need for the planting materials.According to the requirements of Good Agricultural Practices for Chinese Medicinal Drugs,cultural practices for propagation of S.suberectus were summed up and standardized,including the environmental requirements,land preparation,bed preparation,cutting of scions,cuttings treatment,cutting,management of cuttings at the nursery,bagged cuttings ready for transplanting,packing and handling,transportation,and preparation of records for archives.
基金supported by the National Natural Science Foundation of China,No.82202718the Natural Science Foundation of Beijing,No.L212050the China Postdoctoral Science Foundation,Nos.2019M664007,2021T140793(all to ZL)。
文摘Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor site.As an alternative,nerve guidance conduits may be used.The ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve regeneration.We designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align them.Subsequently,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber lumen.The presence of aligned fibers on the inner surface can promote the extension of nerve cells along the fibers.The helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide stability.Our novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.
文摘目的:分析577nm微脉冲激光(SML)光凝联合玻璃体腔注射康柏西普治疗增殖性糖尿病视网膜病变(PDR)患者玻璃体切除术后发生糖尿病性黄斑水肿(DME)的临床效果。方法:回顾性分析2019-01/2021-06就诊于我院经玻璃体切除治疗的PDR患者,术后发生DME患者29例30眼。根据治疗方式不同分为两组,单纯注射组患者14例14眼行玻璃体腔注射康柏西普,联合治疗组患者15例16眼行黄斑区577nm微脉冲激光光凝联合玻璃体腔注射康柏西普。比较两组患者治疗前及治疗6、12mo最佳矫正视力(BCVA)、黄斑中心凹视网膜厚度(CMT)的变化,以及治疗前、治疗12mo多焦视网膜电流图(mfERG)的变化。结果:两组患者治疗6、12mo BCVA(LogMAR)均较术前改善,CMT均较术前下降(均P<0.001)。单纯注射组治疗前及治疗6、12mo BCVA(LogMAR)、CMT与联合治疗组比较均无差异(均P>0.05)。治疗12mo单纯注射组较联合治疗组振幅略低(23.02±3.13 vs 26.50±3.33μV/deg2),潜伏期延长(38.75±1.62 vs 34.21±3.06ms)(均P≤0.001)。随访12mo,单纯注射组注射康柏西普8.14±1.46次,联合治疗组5.05±1.51次(P<0.05)。结论:577nm微脉冲激光光凝联合玻璃体腔注射康柏西普可有效缓解玻璃体切除术后DME患者的黄斑水肿、提高BCVA,并能改善黄斑区视功能,有效减少康柏西普注射次数。
基金funded by the Qin Chuangyuan“Scientist and Engineer”Team Construction Project of Shaanxi Province(No.2024QCY-KXJ-041)the Xi’an Science and Technology Program(Nos.23LLRH0032,23ZDCYJSGG0047-2022)the State Key Laboratory for Mechanical Behavior of Materials(No.20232508).
文摘Effects of solution and aging treatment on the microstructure and mechanical properties of a novel Al-Zn-Mg-Cu alloy by microalloying rare elements Sc and Er were studied.The results show that solution time has a visible influence on the microstructure and mechanical properties of the alloy.Specifically,as the solution time increases,the area fraction of the residual phase in the alloy decreases,and the shape of the grain becomes more spheroidal and coarser,leading to a decrease in hardness.This is attributed to the dissolution of strengthening phases during the solution treatment,which weakens the solid solution strengthening effect.The single-stage aging treatment shows an initial increase in strength and hardness of the alloy,followed by a decrease as the aging time is extended,until a steady state is achieved.The optimal single-aging conditions are found to be at 120℃ for 24 h,where the alloy exhibits an excellent combination of high strength and good ductility,with an ultimate tensile strength(UTS)of 523 MPa,yield strength(YS)of 482 MPa,and elongation(El)of 1.75%,respectively.Compared to single-stage aging,double-stage aging(120℃ for 24 h and then 150℃ for 52 h)significantly increases the elongation of the alloy(4.17%),but the UTS reduces to 465.29 MPa,and YS reduces to 410.64 MPa.Transmission electron microscopy(TEM)observations disclose that the grain size,the distribution spacing of precipitates along the grain boundary,and the width of the precipitation-free zone(PFZ)all undergo augmentation as the duration of the second stage aging process elongates.
基金Supported by Science and Technology Project of Nantong,China(No.MS22015002)
文摘AIM: To investigate the activation of autophagy in rat retina after optic nerve crush(ONC) and evaluate its relationship with apoptosis of retinal ganglion cells(RGCs).METHODS: The ONC model was established. Western blots were performed to investigate expression of p62, LC3 and Beclin-1. Transmission electron microscopy was performed to discover the autophagosomes in the retina after ONC. Immunohistochemistry was used to confirm the distribution of LC3. TUNEL was performed to confirm the relationship between autophagy and RGC apoptosis. RESULTS: p62/Beclin-1 ratio was declined shortly after ONC until to day 7 after ONC and then restored to a normal level at day 21. There was an opposite change in the LC3-II/LC3 I ratio in the retina compared to the p62/Beclin-1 ratio. Increased autophagosomes were found after ONC using transmission electron microscopy, and most of the LC3-stained cells were colocalized with RGCs and Müller cells. More LC3-immunoreactive cells and apoptotic RGCs were found on day 7 following ONC. CONCLUSION: Possible activation of autophagy in RGCs after ONC;autophagy mainly occurred in RGCs and Müller cells, and the apoptosis of RGCs after ONC may be partly associated with autophagic activation.
基金supported by the National Key Research and Development Program of China(2016YFB0701003)Key Program of the Frontier Science of the Chinese Academy of Sciences(YZDY-SSW-JSC018)+1 种基金National Natural Science Foundation of China(51402288)Natural Science Foundation of Liaoning Province(201602674)
文摘A novel orange-red emitting Ba3 Y4 O9：Sm^（3＋） phosphors were prepared by a high temperature solidstate reaction in air. X-ray diffraction（XRD）, photoluminescence spectra, fluorescence decay and temperature-dependent emission spectra were utilized to characterize the structure and luminescence properties. The results show that the excitation spectrum includes a series of linear peaks at350, 367, 382, 410, 424, 445, 470 and 495 nm, respectively. Under 410 nm excitation, the emission peaks were located at 574 nm（~4 G（5/2）-~6 H（5/2））, 608 nm（~4 G（5/2）-~6 H（7/2））,659 nm（~4 G（5/2）-~6 H（9/2）） and722 nm（~4 G（5/2）-~6 H（11/2））, respectively. The concentration quenching occurs when x equals 0.08 for Ba3 Y（4-x）O9：xSm^（3＋） phosphor and its mechanism is ascribed to the dipole-dipole interaction. The chromaticity coordinates of Ba3 Y（3.92）O9：0.08 Sm^（3＋） phosphor are in the orange-red region. The temperature-dependent study shows that this phosphor has excellent luminescence thermal-stability.And the luminescence intensity of Ba3 Y（3.92）O9：0.08 Sm^（3＋） phosphor at 473 K only declines by about25.75% of its initial intensity. The experimental data indicate that Ba3 Y4 O9：Sm^（3＋） phosphor may be promising as an orange-red emitting phosphor for white light emitting diodes.
