INDUSTRIAL CROPS AND PRODUCTS
·
2018
·
IF 3.849
Jun Ni,Lixiang Dong,Zhifang Jiang,Xiuli Yang,Zhehang Sun,Jiaxun Li,Yuhuan Wu,Maojun Xu
Flavonoids play important roles in plant immune responses, but the molecular mechanism and influencing factors on flavonoid accumulation during Ginkgo immune responses are largely unknown. In this research, post-harvest Ginkgo leaves cultured in the dark were treated with salicylic acid (SA). A transcriptome analysis and total flavonoid measurement showed decreased flavonoid biosynthesis and accumulation in leaves. Experiments carried out in seedlings, young and adult trees, showed increased flavonoid content under light conditions but decreased content under dark conditions after treatment with SA. A detailed analysis of individual flavonoids showed similar changes for most of their contents, although some showed different change trends. Single-colored light experiments revealed that red and far-red light, but not blue light, were required in SA-induced flavonoid accumulation. The results clarified the importance of light in SA-induced flavonoid accumulation and provided valuable information to the Ginkgo related pharmaceutical industry.
研究领域:
植物学
·
分子生物学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Yaping You,Ya Zheng,Zesheng Pan,Yunluo Wang,Tianrui Zhou,Minghui Wang,Haijie Chen,Wan Jiang,Lianjun Wang
White light-emitting diode (WLED) has been widely used as solid-state lighting in recent years, with the advantages of energy saving, high luminous efficiency , and safety. Red phosphors are crucial to the color rendering index of WLED, and Eu 3+ -activated red phosphors can significantly improve the chromaticity performance of WLED. In this work, a series of new orange-red emitting BaLiZn 3 (PO 4 ) 3 : Eu 3+ phosphors were synthesized through high-temperature solid-state reaction method. The phase composition , crystal structure, morphology and photoluminescence properties of BaLiZn 3 (PO 4 ) 3 : Eu 3+ samples were investigated. The phosphors can be effectively excited by the violet light at 394 nm and emit orange-red lights corresponding to the electric dipole transition (5D 0 →7F 1 ) at 594 nm. The optimal doping concentration of Eu 3+ ions was about 5 mol%. The concentration quenching was caused by the electric dipole-dipole interaction between Eu 3+ ions. Temperature-dependent PL spectra indicate that BaLiZn 3 (PO 4 ) 3 : Eu 3+ has excellent emission and color stability at high temperatures. The color coordinates were calculated and fall in the orange-red luminescent area. The color purity is about 98.3 %, and the correlated color temperature is 1710K. These results indicate that the new orange-red phosphor BaLiZn 3 (PO 4 ) 3 : Eu 3+ has potential application prospects in WLED.
研究领域:
材料科学
·
发光材料
·
固体照明
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Jiang Zhehui,Wang Tianhao,Zhang Kaixue,Zhang Meiqi,Ma Ling,Ren Weichao,Bao Yihong,Ma Wei
Light quality consists of a spectrum of different bands, which not only affects plant, development, and primary metabolism but also affects the secondary metabolism of plants. It is an important factor affecting the content of active components of medicinal plants. The A. paniculata seedlings planted in the laboratory, as materials, were tested with red light, far red light, blue light, and ultraviolet light separately. The study assays the content of six main chemical components separately by LC-MS, observes the changes in the content, and analyzes the relationship between the light quality and the active ingredient of A. paniculata. Using the ointment yield and pH value, the fingerprint analysis method of A. paniculata standard decoction was established, and we discussed the selection of index components of A. paniculata standard decoction. It was suggested to select andrographolide as the index component. It will provide a theoretical basis for the large area cultivation of A. paniculata and optimize the quality of medicinal materials to ensure the quality of standard decoction.
研究领域:
生药学
·
植物生理学
·
药物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Yi Zhang,Cuiping Zhou,Qifeng Zhang,Pengfei Yin,Xiyuan Sun,Kaiming Wang,Jian Wang,Xing Feng
In this paper, a synthesized material change from perovskite-layer-structured La 2 Ti 2 O 7 to perovskite type LaTiO 3 induced by Li 2 CO 3 addition was observed. The [TiO 6 ] octahedral site symmetry and particle uniformity showed an obvious variation with the change from La 2 Ti 2 O 7 to LaTiO 3 . A broadband far-red emission from 670 to 780 nm emerged when Mn 4+ , Li + ions were co-doped. Furthermore, (Mn 4+ , Li + ) co-doped LaTiO 3 phosphor can be effectively excited by near-UV and blue lights, which is suitable for combining with commercial InGaN LED chips. The LaTiO 3 :0.4%Mn 4+ , 150%Li + phosphor exhibited a high quantum efficiency of 71.1% and a good thermal stability with emission intensity retained 65% at 423 K. Finally, a LED device was fabricated with the LaTiO 3 :0.4%Mn 4+ , 150%Li + phosphor, which matches well with the absorption of photochrome of P FR and shows a good potential for use in agricultural cultivation fields.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2020
·Vol. 9
·期 12
·126001
·
IF 2.142
Dongxin Shi,Xiaoling Xie,Haiqi Pu,Xi Zhang,Qiang Zhou,Zhengliang Wang,Yanqing Ye,Minghong Chen
A novel red-emitting Rb2KGaF6:Mn4+ phosphor with octahedral particulate morphology was presented. The XRD Rietveld refinement results indicate that the phosphor crystallized into the cubic phase of Fm\overline{3}m space group with double perovskite structure. The photo-luminescence spectrum exhibits intense red emission lines with zero-phonon line (ZPL) and v6 peak locating at 620 and 628 nm respectively. The optical parameters of low color temperature (Tc = 3824 K) and high color rendering index (Ra = 90.2 ) from white LED imply its potential application in solid-state lighting.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Horticulturae
·
2024
·Vol. 10
·期 1
·76
·
IF 3.1
Kelong Sun,Ying Peng,Mengyuan Wang,Weihu Li,Yang Li,Jianjun Chen
Alfalfa sprouts are popular as a gourmet vegetable that contains a variety of antioxidants with anti-cancer and anti-coronary heart disease properties. In this study, under a photosynthetic photon flux density (PPFD) of 30 mol·L−1photoperiod of 12 h for 3 days, and a temperature of 25 ± 2 °C, we investigated the effects of different light qualities on the growth, nutritional quality and antioxidant activity of alfalfa sprouts by modulating LEDs with different red and blue ratios, and searched for suitable light-quality conditions for alfalfa sprout growth. The experimental results showed that the dark treatment favored the growth of alfalfa sprout hypocotyls and the increase of soluble sugar content; alfalfa fresh weight was the largest under the white and red light treatments; nitrate content was the lowest in the treatment with a red-to-blue ratio of 2:2 (2R2B); soluble proteins and total phenolic content were the highest in the treatment with red-to-blue ratio of 1:3 (1R3B); and the total antioxidant activity of sprouts was the highest in the blue light treatment.
研究领域:
植物学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2019
·
IF 2.961
Qiying Huang,Weihao Ye,Guangqi Hu,Xiaotang Liu
Bi 3+ and Mn 4+ co-activated Mg 3.5 Ge 1.25 O 6 phosphors were synthesized via a solid-state method in air. Codoping Bi 3+ into the matrix leads to effective enhancement of the deep-red emssion (659 nm) compared to Bi 3+ -free samples. The spectroscopic properties are discussed based on the Bi 3+ (6s 2 )→Ge 4+ (3d 10 ) metal-to-metal charge transfer and energy transfer between Bi 3+ and Mn 4+ . All samples emit deep-red emission ascribed to 2 E g → 4 A 2g transition of Mn 4+ . We have carried out the X-ray power diffraction (XRD), photoluminescence spectrum (PL), field emission scanning electron microscope (FESEM), fourier transform infrared spectroscopy (FT-IR) and UV–Vis absorption measurement to investigate the influences induced by Bi 3+ incorporation.
研究领域:
材料科学
·
光学农业
✓ 已验证
DOI
高影响因子
Frontiers of Optoelectronics
·
2022
·Vol. 15
·期 1
·1-10
·
IF 0
Jiang Mengjia,Li Shuyu,Zhen Chun,Wang Lingsong,Li Fei,Zhang Yihan,Dong Weibing,Zhang Xiaotao,Hu Wenping
Simultaneously realizing the optical and electrical properties of organic materials is always challenging. Herein, a convenient and promising strategy for designing organic materials with integrated optoelectronic properties based on cocrystal engineering has been put forward. By selecting the fluorene (Flu) and the 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) as functional constituents, the Flu-TCNQ cocrystal prepared shows deep red emission at 702 nm, which is comparable to the commercialized red quantum dot. The highest electron mobility of organic field-effect transistor (OFET) based on Flu-TCNQ is 0.32 cm 2 V −1 s −1 . Spectroscopic analysis indicates that the intermolecular driving force contributing to the co-assembly of Flu-TCNQ is mainly charge transfer (CT) interaction, which leads to its different optoelectronic properties from constituents. Graphical Abstract
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
Materials Today Chemistry
·
2024
·
IF 6.7
Weixi Xia,Yulong Ye,Qinan Mao,Yang Ding,Xinyue Li,Meijiao Liu,Jiasong Zhong
The combination of indoor plant growth lamps and soilless cultivation is considered as a promising direction for future agricultural technology. Its environmentally friendly, effective, and energy-saving characteristics make the plant lighting phosphor widely concerned. However, the phosphor with the required emission spectrum for plant growth while simultaneously achieving dual emission of blue and far-red light is still rarely developed. To address this challenge, a series of Sr 2 GdGaO 5 :Bi 3+ , Sr 2 GdGaO 5 :Mn 4+ , and Sr 2 GdGaO 5 :Bi 3+ , Mn 4+ phosphors have been designed and thoroughly characterized in terms of their phases, morphologies, and optical properties . Dual emission of Sr 2 GdGaO 5 : Bi 3+ , Mn 4+ in blue light (475 nm) and far-red light (726 nm) regions is observed under 350 nm ultraviolet light excitation, and the energy transfer mechanism determined to be dipole-dipole interaction. A high coincidence between plant growth absorption spectrum and co-doping induced double emission is realized. Tremendous acceleration of garlic and bean seedling growth can be observed under the illumination of phosphor-encapsulated LED in soil-free conditions. This comprehensive work contributes to the understanding and utilization of phosphors for efficient indoor plant lighting applications and opens new possibilities for energy-saving and effective plant cultivation.
研究领域:
农业技术
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Renping Cao,Yuming Jiao,Xuantian Wang,Xun Ouyang,Huijun Wan,Ting Chen,Guotai Zheng,Shikun Xie
Novel Mg 2 La 3 NbO 9 :Mn 4+ powder phosphors are successfully synthesized by the high-temperature solid-state reaction method under ambient air. The crystal structure, morphology, decay lifetimes, time-resolved emission spectra, and luminescence properties are investigated. The excitation spectrum of Mg 2 La 3 NbO 9 :Mn 4+ phosphor monitored at 708 nm is observed in the region from 210 nm to 600 nm. Mg 2 La 3 NbO 9 :Mn 4+ phosphor with excitation at the ultraviolet (UV) and blue light can emit the far-red emission with the emission band peaking at ~708 nm because of the 2 E → 4 A 2 transition of Mn 4+ and the corresponding chromaticity coordinates (0.7322, 0.2678). The optimal doping concentration of Mn 4+ ion is ~0.6 mol%. The decay lifetime of Mg 2 La 3 NbO 9 :xMn 4+ phosphors decrease from 1.143 ms to 1.099 ms with increasing the Mn 4+ ion concentration from 0.2 mol% to 1.0 mol%. The good thermal stability of Mg 2 La 3 NbO 9 :Mn 4+ phosphor is confirmed by the temperature-dependent emission spectra. The luminous mechanism of Mg 2 La 3 NbO 9 :Mn 4+ phosphor is explained by using the Tanabe Sugano energy level diagram of Mn 4+ ion. All the experimental results imply that Mg 2 La 3 NbO 9 :Mn 4+ phosphor has a potential application in the white light-emitting diodes (LEDs) field.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 65
·40952-40956
·
IF 3.108
Chunlin Tan,Xiuya Su,Chao Zhou,Baoju Wang,Qiuqiang Zhan,Sailing He
Red-emitting carbon dots (C-dots) were synthesized from p-phenylenediamine (p-PD) aqueous solution with nitric acid (HNO3) assistance by hydrothermal reaction at 200 °C for 2 h. p-PD aqueous solution can be transferred to C-dots (or poly(p-PD)) with (or without) the addition of acid. Different acid systems, such as HNO3, H3PO4 and HF, can directly synthesize red-emitting C-dots, and the fluorescence can be enhanced by increasing the strength of acids. N-CDs, 3.46 nm-average-sized C-dots, prepared in dilute HNO3, have a quantum yield of 15.8% with unique, excitation-wavelength independent emission in the red region (600 and 680 nm) and a broad visible excitation band. Carboxyl, ester and hydroxyl groups on the C-dots surface directly lead to red emission. N-CDs have a certain selective specificity for Fe3+ detection and the linear range is 10–300 nmol L−1 with a limit of determination of 1.9 nmol L−1.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhenyu Tang,Peichang Ouyang,Yunfang Liu
Plant greenhouse planting has aroused great attention to the development of plant growth light-emitting diode (LED) light source. Far-red emitting phosphors as the main component of plant growth LED lighting have been studied more and more widely. In this study, Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ with far-red emission for plant LED lighting is synthesized in air. X-ray diffractometer (XRD) with the energy dispersive spectroscopy (EDS) is used to test XRD patterns, EDS, and the element mapping diagrams, confirming that Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ has a hexagonal crystal structure of with pure phase Li 1.6 Mg 1.6 Sn 2.8 O 8 . Photoluminescence excitation (PLE) spectrum, time-resolved PL spectra, decay curves, photoluminescence (PL) spectrum, as well as concentration and temperature dependent PL spectra are investigated in detail. Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ under excitation at 305 nm shows far-red emission peaking at ∼702 nm due to the transition 4 T 1 ( 4 G) → 6 A 1 ( 6 S) of Fe 3+ ion in octahedron [FeO 6 ]. PL spectrum of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ matches with the absorption spectra of plants during the process of photosynthesis, indicating a promising application of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ in plant growth LED lighting. Time-resolved PL spectra prove the only luminescence center (Fe 3+ ). Concentration dependent PL spectra confirm the optimal Fe 3+ concentration (0.8 mol%) and the concentration quenching mechanism is analyzed. The temperature dependent PL spectra show good thermal stability of Li 1.6 Mg 1.6 Sn 2.8 O 8 :Fe 3+ and the heat quenching mechanism is explained.
研究领域:
材料科学
·
园艺学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）