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Economy & the Light Green Consumer
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《China Textile》 2009年第7期38-40,共3页
U.S. consumers are keenly aware of environmental issues and are concerned about the environmental friendliness of the products they buy. However, economic pressures may affect how actively shoppers seek out
关键词 the light green Consumer ECONOMY
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Research on the Application of Green Lighting Technology in Sports Lighting
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作者 Lizhi Liu Jingshuo Huang Xuanmin Zhu 《Journal of Environmental Protection》 2023年第10期781-788,共8页
With China’s continued development of society and economy, the importance of ecological environmental protection is growing. This protection has become an indispensable part of social development. The use of various ... With China’s continued development of society and economy, the importance of ecological environmental protection is growing. This protection has become an indispensable part of social development. The use of various green environmental protection equipment can effectively promote ecological environmental protection and reduce the adverse effects of human activities on the environment. In the field of sports lighting equipment in China, traditional lighting methods constitute an inherent danger to the environment, leading to a waste of valuable resources and environmental pollution. This study involves a multi-tile-multifunctional-function controller, which effectively solves the control problem of the control light. In the sports lighting group, the high and low-level lighting of the sports lighting group, and adjust the light from the height highly effectively to adjust each height. The low-shot mode reduces the power consumption of the system by about 33% to 60%, which significantly helps energy saving. By optimizing the performance of the lighting system, promoting the preservation of power resources, reducing the adverse effects of pollution caused by equipment utilization and energy waste, and promoting the harmonious cohabitation of human and natural environment. . 展开更多
关键词 Parameters of Metal Z-Shaped Single-Ended light Source green lighting Practices Sports lighting System Lamp Model
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Effects of Different Light Qualities on the Growth Characteristics of Populus trinervis
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作者 Jiaqi Li Zhensheng Qiao +1 位作者 Dan Zong Chengzhong He 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第5期1043-1056,共14页
Populus trinervis is native to China and plays an irreplaceable role in maintaining the ecological balance of boreal and temperate forests.P.trinervis mainly grows in high-altitude areas.At present,there are limited s... Populus trinervis is native to China and plays an irreplaceable role in maintaining the ecological balance of boreal and temperate forests.P.trinervis mainly grows in high-altitude areas.At present,there are limited studies on the response of P.trinervis to different light qualities,so it is necessary to investigate the photosynthetic physiological changes of P.trinervis in different light environments.In our study,P.trinervis was grown for 8 months under light filtered by three different colored films.The three treatments were blue film,green film,and white plastic film.The effects of blue(B),green(G),and white(W)light on photosynthetic pigment content,absolute growth,photosynthetic parameters,soluble sugar content,and chlorophyll fluorescence parameters were studied,respectively.Compared to the Wtreatment,the chlorophyll a and b,carotenoids,total chlorophyll content(a+b),absolute growth of seedling height,net photosynthetic rate(PN),water use efficiency(WUE),total soluble sugars,sucrose,and nonphotochemical quenching(NPQ)of P.trinervis were significantly increased under B treatment.Meanwhile,chlorophyll a and b,carotenoids,total chlorophyll(a+b),transpiration rate(Tr),intercellular CO_(2) concentration(Ci),stomatal conductance(gs),absolute growth of seedling height and leaf length,reducing sugar,total soluble sugar content,and NPQ were significantly increased under G treatment.The results showed that the absolute growth and chlorophyll content of P.trinervis were increased under B light,while the sugar and photosynthetic parameters were increased under G light.Additional studies may look into how B light impacts absolute growth and promotional mechanisms,as well as how G light affects the accumulation of sugar levels. 展开更多
关键词 Blue light green light white light photosynthetic pigment soluble sugar
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Monochromatic green light stimulation during incubation shortened the hatching time via pineal function in White Leghorn eggs 被引量:5
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作者 Panlin Wang Yanyan Sun +13 位作者 Yunlei Li Jing Fan Yunhe Zong Adamu Mani Isa Lei Shi Yuanmei Wang Aixin Ni Pingzhuang Ge Linlin Jiang Shixiong Bian Hui Ma Zhengdong Yuan Xiaolin Liu Jilan Chen 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2021年第3期1226-1235,共10页
Background:Effect of monochromatic green light illumination on embryo development has been reported in chickens.The avian pineal gland is an important photo-endocrine organ formed by a mediodorsal protrusion during em... Background:Effect of monochromatic green light illumination on embryo development has been reported in chickens.The avian pineal gland is an important photo-endocrine organ formed by a mediodorsal protrusion during embryonic development.However,the involvement of pineal gland in the light transduction process remains to be elucidated.In the present study,we investigated the influence of monochromatic green light on hatching time and explored the possible mechanism via pineal function.Results:A total of 600 eggs of White Leghorn(Shaver strain)were incubated under photoperiods of either 12 h of light and 12 h of darkness using monochromatic green light(12L:12D group)or 24 h of darkness(0L:24D group)for 18 d.Compared to 0L:24D group,the green light stimulation shortened the hatching time without extending the hatch window or impairing hatchability.The liver of embryos incubated in the 12L:12D light condition was heavier than those of the 0L:24D group on d 21 post incubation which may be linked to the observed increase in the serum concentration of insulin-like growth factor 1(IGF-1);primary secretion of the liver.Histological structure analysis of pineal gland demonstrated that the light stimulation increased follicle area,wall thickness and lumen area on d 10 and d 12 post incubation.Rhythmic function analysis demonstrated that three clock related genes(brain and muscle ARNT-like-1,BMAL1;circadian locomotor output cycles kaput,CLOCK;and cryptochrome-1,CRY1)and a melatonin rate-limiting enzyme related gene(arylalkylamine N-acetyltransferase,AANAT)were rhythmically expressed in the pineal gland of the 12L:12D group,but not in the 0L:24D group.Simultaneously,the light stimulation also increased the concentration of melatonin(MT),which was linked to hepatocyte proliferation and IGF-1 secretion in previous studies.Conclusions:The 12L:12D monochromatic green light stimulation during incubation shortened hatching time without impairing hatching performance.Pineal gland’s early histological development and maturation of its rhythmic function were accelerated by the light stimulation.It may be the key organ in the photo-endocrine axis that regulates embryo development,and the potential mechanism could be through enhanced secretion of MT in the 12L:12D group which promotes the secretion of IGF-1. 展开更多
关键词 Circadian rhythm Hatching time Insulin-like growth factor 1 MELATONIN Monochromatic green light Pineal gland
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Effect of green flickering light on myopia development and expression of M1 muscarinic acetylcholine receptor in guinea pigs 被引量:7
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作者 Yuan Tao Xiao-Li Li +3 位作者 Li-Yuan Sun Yu-Hua Wei Xiao-Ting Yu Hong Wang 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2018年第11期1755-1760,共6页
AIM: To investigate the effects of green flickering light on refractive development and expression of muscarinic acetylcholine receptor(mAChR) M1 in the eyes of guinea pigs.METHODS: Thirty guinea pigs(15-20 days ... AIM: To investigate the effects of green flickering light on refractive development and expression of muscarinic acetylcholine receptor(mAChR) M1 in the eyes of guinea pigs.METHODS: Thirty guinea pigs(15-20 days old) were randomly divided into three groups(n=10/group). Animals in group I were raised in a completely closed carton with green flickering light illumination. Those in group II were kept in the open top closed carton under normal natural light. Guinea pigs were raised in a sight-widen cage under normal natural light in group III. The refractive status and axial length were measured before and after 8 weeks' illumination. Moreover, total RNA extracted from retinal, choroidal, and scleral tissues were determined by real-time reverse transcription polymerase chain reaction(RT-PCR). The expressions of the receptor M1 were also explored in the retina, choroid, and sclera using immunohistochemistry.RESULTS: There was a remarkable reduction in refractive error and increase in axial length after 8-weeks' green flickering light stimulation(P〈0.001). The expression of M1 receptor mRNA in sclera and retina in myopia group were remarkably lower than that in group II and III(P〈0.01). Significant reduced expression of M1 receptor stimulated by green flickering light in retina and sclera tissues were also observed(P〈0.05). However, there was no M1 receptor expression in choroid in 3 groups.CONCLUSION: Myopia can be induced by 8 weeks' green flickering light exposure in the animal model. M1 receptor may be involved causally or protectively in myopia development. 展开更多
关键词 guinea pigs green flashing light myopia model muscarinic acetylcholine RECEPTOR
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Detection of Thrips Defect on Green-Peel Citrus Using Hyperspectral Imaging Technology Combining PCA and B-Spline Lighting Correction Method 被引量:5
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作者 DONG Chun-wang YE Yang +2 位作者 ZHANG Jian-qiang ZHU Hong-kai LIU Fei 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2014年第10期2229-2235,共7页
In order to find an effective method of detecting thrips defect on green-peel citrus, a defect segmentation method was developed using a single threshold value based on combination of characteristic wavelengths princi... In order to find an effective method of detecting thrips defect on green-peel citrus, a defect segmentation method was developed using a single threshold value based on combination of characteristic wavelengths principal component analysis (PCA) and B-spline lighting correction method in this study. At first, four characteristic wavelengths (523, 587, 700 and 768 nm) were obtained using PCA of Vis-NIR (visible and near-infrared) bands and analysis of weighting coefficients; secondarily, PCA was performed using characteristic wavelengths and the second principal component (PC2) was selected to classify images; then, B-spline lighting correction method was proposed to overcome the influence of lighting non-uniform on citrus when thrips defect was segmented; finally, thrips defect on citrus was extracted by global threshold segmentation and morphological image processing. The experimental results show that thrips defect in citrus can be detected with an accuracy of 96.5% by characteristic wavelengths PCA and B-spline lighting correction method. This study shows that thrips defect on green-peel citrus can be effectively identified using hyperspectral imaging technology. 展开更多
关键词 hyperspectral images principal component analysis lighting correction green-peel citrus thrips defect
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Temperature-dependent efficiency droop behaviors of GaN-based green light-emitting diodes 被引量:2
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作者 江蓉 陆海 +4 位作者 陈敦军 任芳芳 闫大为 张荣 郑有炓 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第4期500-503,共4页
The efficiency droop behaviors of GaN-based green light-emitting diodes (LEDs) are studied as a function of temperature from 300 K to 480 K. The overall quantum efficiency of the green LEDs is found to degrade as te... The efficiency droop behaviors of GaN-based green light-emitting diodes (LEDs) are studied as a function of temperature from 300 K to 480 K. The overall quantum efficiency of the green LEDs is found to degrade as temperature increases, which is mainly caused by activation of new non-radiative recombination centers within the LED active layer. Meanwhile, the external quantum efficiency of the green LEDs starts to decrease at low injection current level (1 A/cm2 ) with a temperature-insensitive peak-efficiency-current. In contrast, the peak-efficiency-current of a control GaN-based blue LED shows continuous up-shift at higher temperatures. Around the onset point of efficiency droop, the electroluminescence spectra of the green LEDs also exhibit a monotonic blue-shift of peak energy and a reduction of full width at half maximum as injection current increases. Carrier delocalization is believed to play an important role in causing the efficiency droop in GaN-based green LEDs. 展开更多
关键词 GAN green light-emitting diode efficiency droop ELECTROLUMINESCENCE
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Metamerism Appreciation of Jadeite-Jade Green under the Standard Light Sources D_(65),A and CWF 被引量:6
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作者 GUO Ying WANG Huan +1 位作者 LI Xiang DONG Shirong 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第6期2097-2103,共7页
We tested 288 pieces of the polished cabochon jadeite-jade with high quality green and smooth surfaces using the colorimeter Color i5 based on the CIE 1976 L*a*b* uniform color space. The color changes after altern... We tested 288 pieces of the polished cabochon jadeite-jade with high quality green and smooth surfaces using the colorimeter Color i5 based on the CIE 1976 L*a*b* uniform color space. The color changes after alternating three CIE standard light sources D65, A and CWF were compared, and the degree of metamerism was evaluated. The results show that the CIE standard light sources D65, A and CWF increase the chroma of green and turn bluish green into vivid green, which are similar or to nearly colorless and transparent glass-like samples with fine textures. When the three light sources were individually alternated, the lightness of the jadeite-jades showed little change, but the tone changed significantly. Metamerism occurred only in 3 pairs among the 16 samples that were selected by cluster analysis for quality, and the metamerism colors were highly consistent of L*D65∈(43.47, 46.75), C*D65∈(65.20, 68.80) and ho*D65∈(138.10, 140.23). We can conclude that the jadeite-jade green gradually turns to blue when the color temperature of the light source increases. But when considering both the light sources and the samples, D65 is more suitable to be the light source of jadeite-jade green when compared with the light sources CWF and A. Compared with the CIE standard green and high chroma green, high-quality jadeite-jade green has a slight yellow tone, low lightness and high chroma. The special metamerism index decreased to 1 when the light source alternated among D65, A and CWF. Therefore, the color of jadeite-jade green might be slightly influenced by alternating of the light sources. 展开更多
关键词 Jadeite-Jade green CIE standard light source light source alteration special metamerism index
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Automated Smart Utilization of Background Lights and Daylight for Green Building Efficient and Economic Indoor Lighting Intensity Control
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作者 Muhammad M. A. S. Mahmoud 《Intelligent Control and Automation》 2021年第1期1-15,共15页
The ways which are used today in order to light houses, offices, and most of </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">indoor a... The ways which are used today in order to light houses, offices, and most of </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">indoor areas are inefficient as a lot of energy is consumed unnecessarily during the day time. Mainly this problem</span><span style="font-size:10pt;font-family:""> </span><span style="font-family:Verdana;">because the interior lighting design consider the worst case when the light service is at night, </span><span style="font-family:Verdana;">which</span><span style="font-family:Verdana;"> is not always valid. Also in most cases the lighting system design rel</span><span style="font-family:Verdana;">ies</span><span style="font-family:Verdana;"> on people to control the lights switching on and off. This problem is also one of the design concern</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> in Green Building. In this paper, a solution to this problem and a method for people’s comfort who use the indoor facilities in industrial building</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> is presented. In the proposed smart lighting system, lights switch on automatically when there is somebody in the room or in the occupied space and switch off when there is no occupancy. In addition to this known technique, adjustment of the brightness level of the lights will be possible via the personal computer or any other smart device. In this method, for the illumination level in the area, where is needed to be controlled for better energy saving, </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">light automatically is measured by </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">sensor and considering the amount of background lights coming from outside, automatically the brightness of lights is controlled to reach the preset level that determined for that room. By the means of this method, it is possible to provide better user comfort, avoid human forcedness to switch the light on and off, and hence effective energy sav</span><span style="font-family:Verdana;">ing</span><span style="font-family:Verdana;">. Arduino controller is used to build the controller and to demonstrate the results. Economic analysis was done to calculate the percentage of the energy saving that can be obtained by implementing the proposed smart lighting controller. As an outcome </span><span style="font-family:Verdana;">of </span><span style="font-family:Verdana;">the economic analysis, energy saving norm for an office with </span><span style="font-family:Verdana;">a </span><span style="font-family:Verdana;">standard size was calculated. 展开更多
关键词 Energy Saving lighting Control Smart lighting green Buildings Building Automation
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Green Light-Emitting Region-Regular Poly(9,9-Dihexylfluorene-co-Fluorenone) Prepared from Solvent-Free Oxidative Coupling Polymerization
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作者 ZHAN Caimao CHEN Zhiyuan BAI Weibin YANG Xi 《Wuhan University Journal of Natural Sciences》 CAS 2007年第2期327-332,共6页
Soluble green light-emitting poly(9,9-dihexylfluorene- co-fluorenone) was synthesized by solvent-free oxidative coupling polymerization of 9,9-dihexylfluorene in a facile one-step reaction. The polymers were charact... Soluble green light-emitting poly(9,9-dihexylfluorene- co-fluorenone) was synthesized by solvent-free oxidative coupling polymerization of 9,9-dihexylfluorene in a facile one-step reaction. The polymers were characterized by FT-IR, ^1H NMR, ^13C NMR, UV-Vis and fluorescence spectroscopy. The region-regular structure of the polymer linking at 2, 7'-position on the fluorene moieties was obtained. The FT-IR spectra of the polymers showed fluorenone vibration. The fluorescence spectra of the solid thin film of the polymers displayed green light-emitting, which was emitted from fluorenone moieties produced in the polymerization process. 展开更多
关键词 solvent-free oxidative coupling polymerization poly(9 9-dihexylfluorene-co-fluorenone) green light-emitting
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Effects of Irradiation with Light of Different Photon Densities on the Growth of Young Green Barley Plants
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作者 Tianxiao Meng Eriko Nakamura +4 位作者 Nobuto Irino Khem Raj Joshi Hari Prasad Devkota Shoji Yahara Ryuichiro Kondo 《Agricultural Sciences》 2015年第2期208-216,共9页
In recent years, young green barley has been increasingly used as a functional food ingredient. Studies have shown that cultivated young green barley has different levels of amino acids, vitamin C, and polyphenol cont... In recent years, young green barley has been increasingly used as a functional food ingredient. Studies have shown that cultivated young green barley has different levels of amino acids, vitamin C, and polyphenol content depending on the harvest time. Furthermore, some studies have investigated the effect of the growing conditions on cultivated barley in particular the use of light-emitting diodes (LED). Young green barley was exposed to three light sources of different wavelengths (sun light [ASL], light-emitting diode[LED] - Red 9 + Blue 1 [LED-R9:B1], LED - Red 4 + Green 1+ Blue 1 [LED-R4: G1:B1]). Under light with photon densities of 200 μmolmL-2·s-1, the dry weight of young green barley was not affected, while the differences were observed in the morphology of the underground portion of the plant (roots) depending on the light source. The roots of the plant grown in ASL weighed twice as much as those that were grown under LED irradiation. Furthermore, LED irradiation caused an increase in the amino acid content in plants;the amino acid content of plants grown under LED-R9:B1 was twice as much as that grown under ASL irradiation. Four kinds of cyanogenicglucosides (CGs) were isolated, identified, and their levels were measured. The plant grown under LED-RGB irradiation, including LED-G, produced approximately 20% more CGs as compared to the plants grown under the other two light sources. Thus, it was inferred that young green barley exhibited a stress response under LED-G light and accumulated CGs in the stems and leaves with prepare for any damage that may occur on the leaf surface. The nitrogen (N) content in the root was the lowest, while the CG content was the highest in the plant grown under LED-RGB irradiation. It is inferred that the N content decreased because N was eliminated from the roots to allow for accumulation of CGs response to stress. In general, the growth experiments to use an irradiation condition in which the distance between the light source and plant floor is fixed. It is not clear whether the photon density level received by the top leaves is fixed according to plant growth, by changing the height of plant growing shelf. Therefore, against this background, when the photon density was increased from 200 to 300 μmolmL-2·s-1?under ASL irradiation, only a minimal change was observed in the root weight, while the weight of the part of the plant above the ground surface (stems and leaves) increased by approximately 30%, with a 10% increase in the amino acid content. 展开更多
关键词 YOUNG green BARLEY light-EMITTING Diode CyanogenicGlucosides AMINO Acid TOCOPHEROL
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Visible Light Photocatalytic Degradation of Methylene Blue and Malachite Green Dyes with CuWO<sub>4</sub>-GO Nano Composite
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作者 Sunitha Medidi Sowmyasree Markapurapu +4 位作者 Mastan Rao Kotupalli Rama Krishna Reddy Chinnam Venkata Mahalakshmi Susarla Hima Bindu Gandham Paul Douglas Sanasi 《Modern Research in Catalysis》 2018年第2期17-34,共18页
Copper Tungstate-Graphene Oxide nano composites have been successfully applied as excellent catalysts for the photocatalytic degradation with Methylene blue and Malachite green dyes under visible light irradiation. A ... Copper Tungstate-Graphene Oxide nano composites have been successfully applied as excellent catalysts for the photocatalytic degradation with Methylene blue and Malachite green dyes under visible light irradiation. A facile?solid state metathesis synthesis of copper tungstate (CuWO4) followed by ball milling and subsequent preparation of copper tungstate-graphene oxide?(CuWO4-GO) nano composite using a colloidal blending process and its application as a visible light photocatalyst for the degradation of Malachite green and Methylene blue dyes. The morphology and composition of copper tungstate (CuWO4) nano composite have been characterized using X-Ray Diffraction (XRD), UV-Visible Diffuse Reflectance Spectra (UV-DRS), Raman Spectra, Field Emission Scanning Electron Microscopy (FESEM)-EDS and UV Visible Spectroscopy. It shows a band gap value of 2.13 eV, an increase in range and intensity of light absorption and the reduction of electron-hole pair recombination in CuWO4 with the introducing of GO on to it. 展开更多
关键词 Copper TUNGSTATE Graphene Oxide METATHESIS METHYLENE Blue MALACHITE green Visible light Photodegradation
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基于转录组测序研究绿光影响鹅胚心脏早期发育的候选基因
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作者 陈哲 曲小露 +2 位作者 郭彬彬 孙雪峰 闫乐艳 《畜牧兽医学报》 CAS CSCD 北大核心 2024年第5期1978-1988,共11页
旨在通过分析鹅胚心脏在绿光光照刺激下的基因表达差异,挖掘心脏发育的候选基因。本研究将512枚鹅种蛋,随机均分在正常黑暗孵化以及补充绿光的两台孵化机中,每台孵化机内放置4层(64枚·层^(-1)),绿光孵化机提供15 min开灯和15 min... 旨在通过分析鹅胚心脏在绿光光照刺激下的基因表达差异,挖掘心脏发育的候选基因。本研究将512枚鹅种蛋,随机均分在正常黑暗孵化以及补充绿光的两台孵化机中,每台孵化机内放置4层(64枚·层^(-1)),绿光孵化机提供15 min开灯和15 min关灯的间歇光照。在孵化第13、16、20、24、28和30天时,每组随机挑选种蛋8枚,称取胚胎重量,分离胚胎心脏组织并称重;采集孵化第13天的胚胎心脏组织(每组各3),进行转录组测序(RNA-Seq),筛选差异表达基因(DEGs)并进行功能富集分析,鉴定与绿光促进心脏发育相关的候选基因。并通过荧光定量PCR(qRT-PCR方法)验证测序结果的可靠性。结果表明:绿光显著提高16和30胚龄胚重比例(胚胎重/入孵蛋重×100)(P<0.05),以及13和16胚龄心脏指数(心脏重/胚胎重×100)(P<0.05)。心脏转录组测序分析共筛选出1 643个DEGs。随机选择7个DEGs进行RT-qPCR验证,表达趋势与测序结果一致。功能富集分析表明,DEGs主要涉及PI3K-Akt信号通路、AMPK信号通路等通路,最终筛选出GATA4、GATA5、Smad4和GHR这4个候选基因。对它们在不同胚龄阶段心脏组织中的mRNA表达量进行分析,其表达模式进一步表明了其在绿光调控心脏发育过程中的作用。本研究发现,鹅蛋孵化期绿光处理促进了胚胎和心脏发育,进一步通过心脏组织转录组数据分析,鉴定到了4个鹅胚心脏发育候选基因GATA4、GATA5、Smad4和GHR,为鹅胚心脏组织发育的分子调控机制提供了线索,并为绿光应用于鹅种蛋孵化提供了理论基础。 展开更多
关键词 绿光 孵化 心脏 转录组 GATA4
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一种Y型延迟荧光分子及其蓝光和绿光OLED应用
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作者 孙静 樊志杰 +2 位作者 杜纪宽 董海亮 王华 《发光学报》 EI CAS CSCD 北大核心 2024年第1期78-85,共8页
以噻吨酮作为受体、3,6-(二咔唑基)三咔唑作为给体设计合成了一种具有延迟荧光特性的Y型分子(TX-TCz)。模拟计算表明化合物HOMO和LUMO能级完全分离且在苯环上存在较小的重叠,有助于获得小的S1和T1的能级差ΔEST。随着溶剂极性的增加,化... 以噻吨酮作为受体、3,6-(二咔唑基)三咔唑作为给体设计合成了一种具有延迟荧光特性的Y型分子(TX-TCz)。模拟计算表明化合物HOMO和LUMO能级完全分离且在苯环上存在较小的重叠,有助于获得小的S1和T1的能级差ΔEST。随着溶剂极性的增加,化合物发射峰发生明显的红移且由于电荷转移态和局域激发态的共存产生了双峰发射。在纯膜中TX-TCz的发射峰位于513 nm,量子产率为11.5%。基于低温下荧光和磷光发射峰,计算得到化合物的ΔEST为0.03 eV,并且检测到µs级的寿命,说明化合物具有延迟荧光发射。与此同时,化合物展示了良好的热稳定性能和电化学性能,有助于制备高性能OLED器件。其在掺杂浓度为5%(wt)的器件中展示了良好的蓝光性能,发射峰位于463 nm,最大外量子效率为1.53%;在非掺杂器件中展示了良好的绿光发射(522 nm),最大外量子效率达到1.81%。 展开更多
关键词 OLED Y型分子 蓝光/绿光 延迟荧光
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直出式绿激光膀胱肿瘤剜除术与经尿道膀胱肿瘤等离子电切在治疗非肌层浸润性膀胱癌的围手术期疗效的比较
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作者 汪群锋 梁朝朝 +1 位作者 朱劲松 陈志洁 《现代泌尿生殖肿瘤杂志》 2024年第2期85-88,共4页
目的比较直出式绿激光膀胱肿瘤剜除术与经尿道膀胱肿瘤等离子电切术治疗非肌层浸润性膀胱癌(NMIBC)的疗效。方法回顾性分析2019年3月至2020年3月于安庆市立医院泌尿外科治疗的80例NMIBC患者的临床资料,通过随机数表法将80例患者均分为两... 目的比较直出式绿激光膀胱肿瘤剜除术与经尿道膀胱肿瘤等离子电切术治疗非肌层浸润性膀胱癌(NMIBC)的疗效。方法回顾性分析2019年3月至2020年3月于安庆市立医院泌尿外科治疗的80例NMIBC患者的临床资料,通过随机数表法将80例患者均分为两组,其中实验组采用直出式绿激光膀胱肿瘤剜除术,对照组采用经尿道膀胱肿瘤等离子电切术。对两组的术中出血量、术后膀胱冲洗时间、留置尿管时间、术后住院时间以及术中、术后并发症发生情况进行比较分析。结果两组患者手术均顺利完成,实验组在手术时间、复发率方面与对照组相比差异无统计学意义(P>0.05)。实验组术中出血量、术后膀胱冲洗时间、留置尿管时间、术后住院时间小于对照组;实验组在术后出血、闭孔神经反射和膀胱穿孔发生率明显低于对照组,差异有统计学意义(P<0.05)。结论直出式绿激光膀胱肿瘤剜除术治疗NMIBC较经尿道膀胱肿瘤等离子电切术更安全、有效,具有微创、出血少、并发症风险低等优点,值得临床推广使用。 展开更多
关键词 直出式绿激光 等离子电切术 非肌层浸润性膀胱癌 手术治疗
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不同波长LEDs光源对苦荞芽菜生长、生物活性物积累及抗氧化活性的影响
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作者 陈丽丽 吕平 +5 位作者 吕少杰 房明志 李斌 胡跃高 薛绪掌 康文艺 《中国农学通报》 2024年第12期45-52,共8页
为探究不同波长LEDs光源对苦荞芽菜生长的影响,本研究以黑暗(D)作对照,采用单色红(R)、蓝(B)、绿(G)光源培养苦荞芽菜,收获后分别测定其形态指标、生物活性物积累量、类黄酮合成关键基因表达量及抗氧化活性指标,结果表明:B处理的苦荞芽... 为探究不同波长LEDs光源对苦荞芽菜生长的影响,本研究以黑暗(D)作对照,采用单色红(R)、蓝(B)、绿(G)光源培养苦荞芽菜,收获后分别测定其形态指标、生物活性物积累量、类黄酮合成关键基因表达量及抗氧化活性指标,结果表明:B处理的苦荞芽菜下胚轴呈深红色,伸长生长受到强烈抑制,花青素、总黄酮及总酚积累量均最高,分别是D的7.18、2.96和2.49倍;R处理的下胚轴呈浅粉色,上述3种生物活性物积累量分别是对照的2.56、1.68和1.40倍;G处理的下胚轴伸长与R相似,外观呈透明白色,生物活性物积累量与对照无显著差异。B和R均强烈诱导类黄酮生物合成通路上关键结构基因表达,显著增加苦荞芽菜下胚轴抗氧化活性。此外,各单色光处理均未显著影响苦荞芽菜可食用部位的鲜重。由此可见,红、蓝LEDs光源可显著影响苦荞芽菜形态生长,并增加其生物活性物积累及抗氧化能力,以蓝光最佳。 展开更多
关键词 红/蓝/绿LEDs光源 苦荞芽菜 生物活性物 抗氧化活性 类黄酮合成基因表达
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孵化期紫外线和绿光照射对茶花鸡胚胎及雏鸡生长的影响
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作者 赖金花 杨雨 +4 位作者 鲁绍雄 王孝义 陈强 王淑燕 李明丽 《中国家禽》 北大核心 2024年第4期67-72,共6页
试验旨在揭示孵化期中波紫外线和绿光照射对茶花鸡胚胎及雏鸡生长的影响。试验选择茶花鸡种蛋450个,随机分为对照组、紫外线组和绿光组,每组150个种蛋。在种蛋孵化0~18 d,对照组不作任何光照处理,紫外线组每天连续接受30 min中波紫外线... 试验旨在揭示孵化期中波紫外线和绿光照射对茶花鸡胚胎及雏鸡生长的影响。试验选择茶花鸡种蛋450个,随机分为对照组、紫外线组和绿光组,每组150个种蛋。在种蛋孵化0~18 d,对照组不作任何光照处理,紫外线组每天连续接受30 min中波紫外线(照射剂量12.75μW·h/cm^(2))照射,绿光组每天连续接受12 h绿光(光照强度523 lx)照射,测定并分析各处理组孵化后期胚胎和出壳后2周内雏鸡的生长指标差异。结果显示:在孵化期内,紫外线组14 d、16 d、18 d胚胎重和体长以及14 d、16 d心脏重显著高于对照组(P<0.05),14 d和18 d残余卵黄重显著低于对照组(P<0.05),而紫外线组和绿光组各项指标差异均不显著(P>0.05);绿光组仅16 d心脏重和18 d胚胎体长显著高于对照组(P<0.05)。出壳后,紫外线组雏鸡的0、7、14日龄体重、体长、胫骨长、跖骨长、胸宽和胸深显著高于对照组(P<0.05或P<0.01),0日龄体长和胫骨长,7日龄体重、胫骨长、跖骨长和胸深,14日龄体重和胫骨长显著高于绿光组(P<0.05或P<0.01);绿光组雏鸡3个日龄体重、0日龄胸宽和胸深、7日龄体长及14日龄胸宽显著高于对照组(P<0.05或P<0.01)。综上可见,孵化期接受适量中波紫外线或绿光照射可促进鸡胚和雏鸡生长,且紫外线照射的效果总体上优于绿光。 展开更多
关键词 中波紫外线 绿光 茶花鸡 胚胎发育 雏鸡生长
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红光诱导菠菜叶提取物催化对羟基苯甲腈的绿色合成——药学类本科生新创实验的研究与探索
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作者 曹陶 房方 +2 位作者 李念光 张毅楠 詹其琛 《大学化学》 CAS 2024年第5期63-69,共7页
在现代有机化学合成反应中,光照是一种重要的反应条件,但是在现行的有机化学实验教材中很少涉及。本新创实验采用微量化方法,借鉴自然界中的光合作用原理,尝试利用可见光红光诱导菠菜叶中的叶绿素,催化对氰基苯硼酸与空气中的氧气发生... 在现代有机化学合成反应中,光照是一种重要的反应条件,但是在现行的有机化学实验教材中很少涉及。本新创实验采用微量化方法,借鉴自然界中的光合作用原理,尝试利用可见光红光诱导菠菜叶中的叶绿素,催化对氰基苯硼酸与空气中的氧气发生氧化反应合成对羟基苯甲腈。在我校有机化学实验教学中引入该综合实验,具有如下优点:(1)所用催化剂绿色环保、简单易得,合成过程安全可靠,实验成本低;(2)微量化实验有利于减少环境污染,提高实验安全,节省试剂和时间,减少仪器损耗,有利于培养学生严谨细致的实验作风和习惯;(3)在拓宽学生的知识面和眼界的同时,激发学生的学习兴趣,调动学生的学习积极性。 展开更多
关键词 菠菜叶 叶绿素 红光 对羟基苯甲腈 绿色合成
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填闲作物还田方式对烟田土壤轻重组有机碳的影响
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作者 宋艳丹 韩会阁 +6 位作者 王孟孟 徐文正 李建华 刘巧真 阎海涛 王典 吴照辉 《山西农业科学》 2024年第3期60-67,共8页
为了提高多年连作烟田的土壤肥力,改善土壤生态环境,在烤烟冬闲期种植油菜、冬牧70、光叶紫花苕等3种作物,同时以冬季空闲不种植任何作物为对照,采取2种方式(掩青和收割)进行处理,通过测定不同处理不同土层的土壤轻、重组有机碳含量、... 为了提高多年连作烟田的土壤肥力,改善土壤生态环境,在烤烟冬闲期种植油菜、冬牧70、光叶紫花苕等3种作物,同时以冬季空闲不种植任何作物为对照,采取2种方式(掩青和收割)进行处理,通过测定不同处理不同土层的土壤轻、重组有机碳含量、比例及储量,探讨填闲作物收割和掩青处理对烟田土壤轻重组有机碳的影响。结果表明,不同填闲作物和不同还田方式下土壤总有机碳、重组有机碳、轻组有机碳含量均随着土壤深度的增加而降低。与对照相比,填闲作物掩青处理能够显著增加土壤总有机碳、重组有机碳、轻组有机碳含量,尤其是冬牧70在20~40 cm土层增加比较显著,分别增加了22.3%、21.98%、27.78%;填闲作物收割处理会降低土壤轻组有机碳比例和土壤轻组有机碳储量,而掩青处理则会增加土壤轻组有机碳比例和轻组有机碳储量,其中冬牧70掩青在0~20 cm土层增加比较明显,分别增加了18.14%、40.03%。填闲作物掩青处理增加了烟田土壤的含水量和持水量、降低了土壤容重以及增加土壤轻重组有机碳储量。综合来看,冬牧70掩青处理效果最好,能显著增加土壤总有机碳和轻重组有机碳含量,油菜次之。 展开更多
关键词 填闲作物 烟田 掩青 收割 轻组有机碳 重组有机碳
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可见光催化合成异喹啉酮生物碱的创新实验及课程转化实践思考
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作者 唐雨榕 时允仁 +3 位作者 徐溢 秦波 徐彦芹 蔡云飞 《大学化学》 CAS 2024年第5期296-306,共11页
为有效拓展现阶段本科有机化学教学实验开设的范围,让学生了解学科前沿研究热点与新合成技术,本实验以异喹啉酮生物碱的光化学合成为导向,将有机光化学和连续流动化学融合运用于本科实验教学。本实验选择氮化碳半导体材料作为非均相光... 为有效拓展现阶段本科有机化学教学实验开设的范围,让学生了解学科前沿研究热点与新合成技术,本实验以异喹啉酮生物碱的光化学合成为导向,将有机光化学和连续流动化学融合运用于本科实验教学。本实验选择氮化碳半导体材料作为非均相光催化剂,氧气作为绿色、经济的氧化剂,在可见光介导下实现异喹啉酮生物碱的合成。实验主要由间歇光反应和连续流光反应合成异喹啉酮生物碱以及合成高附加值天然产物corydaldine三部分组成,涉及搭建简易连续流光化学反应装置、反应监测、分离纯化、产物表征等多个重要环节,指导学生认识光化学反应知识,也让学生熟悉微量有机反应中薄层分析法、柱层析及相关仪器的操作,并将所学的红外、核磁共振波谱法等理论知识运用到产物的结构分析中,提升学生的主观能动性、综合实践能力和环保意识。本创新实验竞赛项目符合实验绿色化、微型化的新理念,适合于在化学化工专业本科生的有机化学实验和综合化学实验中开展,将其转化本科实验教学项目,可充分体现“以赛促建”“以赛促教”“以赛促学”的重要意义。 展开更多
关键词 可见光催化 连续流反应 绿色合成 异喹啉酮
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