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萍乡显性核不育水稻育性感温性研究 被引量:11
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作者 颜龙安 蔡耀辉 +3 位作者 刘秋英 张俊才 张晓波 杨正威 《江西农业学报》 1996年第2期85-88,共4页
萍乡显性核不育水稻感温性主要表现:①不同稃尖性状的不育株感温效应不同,红色稃尖的不育株比白色稃尖的不育株感温效应更强;②不同遗传背景的不育株感温效应不同;③同一株系不同单株感温效应不同;感温性强的单株其后代不育材料感... 萍乡显性核不育水稻感温性主要表现:①不同稃尖性状的不育株感温效应不同,红色稃尖的不育株比白色稃尖的不育株感温效应更强;②不同遗传背景的不育株感温效应不同;③同一株系不同单株感温效应不同;感温性强的单株其后代不育材料感温性也强。说明显性核不育材料的感温性具有相对稳定的遗传效应,通过理想亲本选择可削弱不育材料的感温性。本文提出了通过高温筛选减少温度对不育性影响。 展开更多
关键词 水稻 显性核不育 感温效应 育性感温
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感温变色材料成为市场新宠 被引量:1
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作者 江霞 《化工文摘》 2003年第8期33-33,共1页
感温变色塑料能够通过改变自身颜色来显示温度的变化,这种特性可以使塑料产品增加一些特殊的功能和外观美感。长期以来,塑料感温变色效应的应用一直受到技术方面的限制,但现在新技术的发展已使得其应用领域有望进一步拓宽。
关键词 感温变色材料 市场 塑料 感温变色效应 功能 外观美感
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Minority-Carrier Exclusion Effect in Thin-Film SOI Temperature Sensor
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作者 李斌 黎沛涛 +1 位作者 刘百勇 郑学仁 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2003年第5期461-465,共5页
A silicon temperature sensor with a conventional resistor structure is fabricated on thin-film silicon-on-insulator (SOI) substrate.The sensor has very promising characteristics.The maximum operating temperature ca... A silicon temperature sensor with a conventional resistor structure is fabricated on thin-film silicon-on-insulator (SOI) substrate.The sensor has very promising characteristics.The maximum operating temperature can reach 550℃ even at a low current of 0.1mA.Experimental results support that the minority-carrier exclusion effect can be strong in the conventional resistor structure when the silicon film is sufficiently thin,thus significantly raising the maximum operating temperature.Moreover,since the structure of the device on thin-film SOI wafer is not crucial in controlling the maximum operating temperature,device layout can be varied according to the requirements of applications. 展开更多
关键词 minority-carrier exclusion effect high temperature sensors spreading resistance SOI
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Non-cropping period accounting for over a half of annual nitric oxide releases from cultivated calcareous-soil alpine ecosystems with marginally low emission factors
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作者 LIN Fei LIU Chun-Yan +5 位作者 HU Xiao-Xia FU Yong-Feng ZHENG Xunhua ZHANG Wei WANG Rui CAO Guang-Min 《Atmospheric and Oceanic Science Letters》 CSCD 2018年第4期338-344,共7页
Nitric oxide(NO)emissions from alpine ecosystems conventionally being long-term cultivated with feed crops are not well quantified.The authors attempted to address this knowledge gap by performing a year-round experim... Nitric oxide(NO)emissions from alpine ecosystems conventionally being long-term cultivated with feed crops are not well quantified.The authors attempted to address this knowledge gap by performing a year-round experimental campaign in the northeastern Tibetan Plateau.Fertilized(F)and unfertilized(UF)treatments were established within a flat calcareous-soil site for the long-term cultivation of feed oats.NO fluxes and five soil variables were simultaneously measured.A single plow tillage accounted for approximately 54%–73%of the NO releases during the cropping period(CP);and the non-cropping period(NCP)contributed to 51%–58%of the annual emissions.The direct NO emissions factor(EFd)was 0.021%±0.021%.Significantly lower Q10 values(p<0.01)occurred in the F treatment during the CP(approximately 3.6)compared to those during the other period or in the other treatment(approximately 4.9?5.1),indicating a fertilizer-induced reduction in the temperature sensitivity.The selected soil variables jointly accounted for up to 72%(p<0.01)of the variance for all the fluxes across both treatments.This finding suggests that temporally and/or spatially distributed fluxes from alpine calcareous-soil ecosystems for feed crop production may be easily predicted if data on these soil variables are available.Further studies are needed to test the hypothesis that the EFd is larger in alpine feed-oat fields than those in this study if the soil moisture content is higher during the period following the basal application of ammoniumor urea-based fertilizer. 展开更多
关键词 Nitric oxide(NO)emissions direct NO emissions factor alpine meadow cultivation non-growing season freeze– thaw period plow tillage effect temperature sensitivity(Q10)
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Lanthanide-doped metal-organic frameworks with multicolor mechanoluminescence 被引量:1
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作者 Wenwei Chen Yixi Zhuang +3 位作者 Changjian Chen Ying Lv Ming-Sheng Wang Rong-Jun Xie 《Science China Materials》 SCIE EI CAS CSCD 2021年第4期931-941,共11页
Metal-organic frameworks(MOFs)and mechanoluminescent(ML)materials have been considered as two types of promising materials that have their own application fields.It would be amazing to endow one material with the adva... Metal-organic frameworks(MOFs)and mechanoluminescent(ML)materials have been considered as two types of promising materials that have their own application fields.It would be amazing to endow one material with the advantages of ML and MOFs,thus broadening their applications.However,there are quite few investigations on this topic,and the ML mechanism in ML-MOFs remains unclear.In this study,we proposed a strategy for developing ML-MOFs by doping lanthanide ions into the non-centrosymmetric SBD([Sr(μ-BDC)(DMF)]∞)MOF,and successfully synthesized a series of lanthanide-doped MOFs Ln-SBD(Ln=Tb,Dy,Sm,Eu)and Tb1-xEux-SBD(x=0.2,0.4,0.6,0.8)with multicolor ML.The lanthanide ions were uniformly distributed in the matrix of the SBD-MOF,and occupied the Sr site.The MLMOFs exhibited intense multicolor ML emissions varying from green to yellow to red by changing the co-doping ratios and species of lanthanide ions.The similar ML and photoluminescence(PL)spectra indicated that the ML emission was assigned to the radiative transition from the excited states to the ground states of lanthanide ions.The radiative transition was induced by the electron bombardment process that originated from the piezoelectric effect of the non-centrosymmetric SBD host.In addition,a pioneering temperature sensing research based on ML was carried out,which is promising for realizing dual-functional detection of stress and temperature without excitation light sources.This study gives a unique insight for developing more versatile and interesting smart materials by combining the versatility of MOF with the ML emission,imparting additional values to both MOF and ML materials.Moreover,this study provides a general rule for selecting MOFs with an acentric structure as the host for ML materials. 展开更多
关键词 metal-organic frameworks lanthanide-doped multicolor mechanoluminescence temperature sensing
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Study on a novel photonic crystal temperature sensor
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作者 傅海威 赵辉 +3 位作者 乔学光 李岩 赵大壮 雍振 《Optoelectronics Letters》 EI 2011年第6期419-422,共4页
In this paper, a model of photonic crystal temperature sensor based on crystal microcavity in a straight photonic crystal waveguide is proposed. The transmission characteristics of light in the sensor under different ... In this paper, a model of photonic crystal temperature sensor based on crystal microcavity in a straight photonic crystal waveguide is proposed. The transmission characteristics of light in the sensor under different temperatures are simulated by using finite-difference time-domain (FDTD) method. The thermal expansion and thermal-optic effects of silicon are taken into account. The results show that the resonant wavelength of microcavity increases linearly as the temperature rising. The wavelength shift along with temperature is 6.6 pm /℃. 展开更多
关键词 Finite difference time domain method Light transmission MICROCAVITIES Temperature sensors Thermal expansion Time domain analysis
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