Purple Light Research Articles

Stable and Reusable Light-Responsive Reduced Covalent Organic Framework (COF-300-AR) as a Oxidase-Mimicking Catalyst for GSH Detection in Cell Lysate.

Covalent organic frameworks (COFs), as one of the most significant members of the porous organic frameworks, have been well used in the photocatalysis owing to their outspread π-conjugated framework, high crystallinity and regular pore structure. Herein, after reducing the labile imine-linked COF-300 to the more stable amine-linked COF-300-AR, we for the first time demonstrated that COF-300-AR was the light-responsive oxidase mimic. COF-300-AR exhibited excellent oxidase-mimicking activity under purple light stimulation (λ = 400 nm), which can catalyze the oxidation of classical substrates such as 3,3',5,5'-tetramethylbenzydine (TMB) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) by the formation of •OH and O2•- free radicals in the presence of dissolved oxygen. The COF-300-AR oxidase mimic has outstanding advantages of easy light control, high stability, good reusability, and highly catalytic oxidation capacity and has been applied to detect glutathione (GSH) levels in HL60 cells with good selectivity and high sensitivity. This study will broaden the sensing applications of COFs and offer a promising build block for the construction of artificial enzymes.

Effects of Fe2O3 substitution for K2O on the physical properties of 88P2O5–xFe2O3–2CoO–(10 − x)K2O glasses

88P2O5–xFe2O3–2CoO–(10−x)K2O glasses from x=0.0 to x=0.5 were prepared at 850°C using melt quenching technique.These glass systems were characterized by using X-ray diffraction, differential scanning calorimetry (DSC), magnetic measurements, Raman spectroscopy, Archimedes methods, Brewster spectrometer, UV–vis spectrophotometer and impedance spectroscopy. X-ray diffraction revealed that these glass systems have amorphous structure. DSC has showed that the thermal stability of the glass samples increased with the rate of iron. Raman spectra showed the presence of the P–O–Fe group which increases the rigidity of the glass samples. The density of our compounds increased with the increase of the amount of iron oxide.Magnetic measurements at 5K using vibrating sample magnetometer technique show antiferromagnetic behavior of these system glasses.According to the results of the optical absorption spectra, the values of the gap energy and Urbach energy decreased and the refractive index of the glass increased with the increase of the mole of Fe2O3. Brewster spectrophotometer has showed an optical index (n>1.5). On other hand, the chromatic coordinates of all samples to the area of blue–purple light emission.Electrical properties were studied using the technique of impedance alternative spectroscopy over a temperature range 423–623K in the frequency range of 40Hz–13MHz; conductivity under variable regime σac follows Jonscher's law. The conductivity σdc follows the Arrhenius law with an activation energy value too low (≈0.3eV) and decreased with the rate of iron, indicating polaronic conduction.The dielectric study showed high values of dielectric constant at low frequency with low loss at high frequency. The modulus revealed dipolar relaxations.

Flexible Multicolor Electroluminescent Devices on Cellulose Nanocrystal Platform

In this work, flexible electroluminescent devices (FELDs) are demonstrated using environmentally‐friendly cellulose nanocrystal (CNC) substrates with a silver nanowire conductive network. The CNC sheets with drop‐casted silver nanowires act as highly transparent conductive electrodes for an electroluminescent layer (a phosphorescent ink containing Cu/Br‐doped ZnS microparticles). This phosphorescent device requires operating voltages as low as 7 V and achieves high luminance of up to 43 Cd m−2 (at 50 V). Furthermore, through impregnating the CNC host material with Rhodamine 6G or Thiazol Yellow G, different emission colors are achieved: blue, turquoise, green, and purple light emission having a broad (400–650 nm) luminescence spectrum are obtained. This device, which uses earth‐abundant, cost‐effective, and recyclable materials, is envisioned to lead to advancements in the areas of electronics and lighting technology.

An Evaluation of a Classroom-Based Intervention to Improve Executive Functions in 4-Year Old Children in New Zealand

Executive functions (EFs) are foundational for the development of cognitive and social capacities critical for school readiness. The importance of promoting EF skills prior to school entry is increasing recognized but few preschool classroom-based interventions specifically target EF skills. The aim of this study was to evaluate the effectiveness of a classroom-based intervention, Red Light Purple Light (RLPL), to enhance 4-year-old children’s EF skills. Fifteen early childhood education (ECE) centers in Auckland, New Zealand participated. There was a total of 212 consented 4-year-old children across the 15 centers. Centers were randomized to either the RLPL intervention (twice weekly circle time games sessions over 8 weeks) or a waitlist control group (the usual curriculum). Children’s EF skills were measured at pre-, post-, and 4-month postintervention using the Head–Toes–Knees–Shoulder (HTKS) and Dimensional Change Card Sort (DCCS) tasks. Teacher ratings of behavioral self-regulation were collected with the Child Behavior Rating Scale (CBRS). Hierarchical linear mixed models were used to estimate the intervention effects, taking into account baseline scores, English vocabulary, age, and gender. Post-intervention interviews were conducted with 15 teachers. Significant short-term intervention effects were found for increases in EFs, based on DCCS scores. At 4-month follow-up, there were greater gains in CBRS scores for intervention group children. Teacher interviews indicated additional benefits of participation for children in self-control, language, and social skills. The study provides support for the effectiveness of the RLPL intervention, delivered by teachers in preschool classrooms, for improving children’s EF skills.

Efficient photocatalytic oxidative deamination of imine and amine to aldehyde over nitrogen-doped KTi3NbO9 under purple light

Nitrogen doped titanoniobate (N-KTi3NbO9) exhibits excellent performance in photocatalytic oxidative deamination of imine and amine to aldehyde.

Highly efficient white light-emitting diode by using purple light chip and yellow–green phosphor

To explore highly efficient white light-emitting diode, a series of Mn2+-doped borophosphate glasses were prepared. Under 402 nm excitation, the borophosphate glass doped with 6 mol% Mn2+ ion can emit the strong yellow–green luminescence (peak at 567 nm). Thus, white light can be obtained by combining the violet radiation light (~402 nm) with yellow–green luminescence (~567 nm), whose CIE coordinate is (x = 0.342, y = 0.338), and whose luminescence quantum yield is more than 50% dependent on the excitation power. And the CIE coordinate do not vary with increasing of the excitation power. The excellently optical characters of the material are helpful for white light-emitting diode (White LED).

Red Light, Purple Light! Results of an Intervention to Promote School Readiness for Children From Low-Income Backgrounds.

Considerable research has examined interventions that facilitate school readiness skills in young children. One intervention, Red Light, Purple Light Circle Time Games (RLPL; Tominey and McClelland, 2011; Schmitt et al., 2015), includes music and movement games that aim to foster self-regulation skills. The present study (N = 157) focused on children from families with low-income and compared the RLPL intervention (SR) to a revised version of RLPL that included literacy and math content (SR+) and a Business-As-Usual (BAU) control group. In both versions of the intervention, teachers were trained to administer the self-regulation intervention in preschool classrooms with coaching support. Although not statistically significant, children receiving either version of the intervention gained more in self-regulation on the Head-Toes-Knees-Shoulders (HTKS) over the preschool year compared to the BAU group (β = 0.09, p = 0.082, Cohen’s d = 0.31). Effect sizes were similar to previous studies (Schmitt et al., 2015; Duncan et al., 2018) and translated to a 21% difference in self-regulation over and above the BAU group at post-test. Furthermore, children participating in either version of the intervention gained significantly more in math across the school year compared to children in the BAU group (β = 0.14; p = 0.003, Cohen’s d = 0.38), which translated to a 24% difference in math over and above the BAU group at post-test. Results were somewhat stronger for the SR+ version, although effect sizes across intervention conditions were comparable. There were no statistically significant differences across groups for literacy skills. Results extend previous research and suggest that the RLPL intervention, which includes an explicit focus on self-regulation through music and movement games, may improve children’s self-regulation and math scores over the preschool year.

Ligand memory effect in purple quantum dot LEDs

We report a ligand-dependent, trap state memory effect in a purple quantum dot light emitting diode. The measured, bistable current-voltage characteristics show a high conductance state and a low conductance state. Thereby, a memory window with an ON state and an OFF state is achieved, which can be reversed by applying a negative bias. The height of the memory window depends strongly on the length of the ligand passivating the quantum dot (QD). Together with a 5 nm thick aluminum film under the hole transport layer, charges accumulate at the charge transport/quantum dot ligand interface, leading to an increase in conductance during the forward voltage sweep. During a reverse voltage sweep, previously injected charge carriers recombine until the active layer is free of charge carriers. Voltage-capacitance measurements confirm the changes in the charge carrier population within the active layer and demonstrate that they depend on both the direction of the bias sweep and ligands surrounding the QD.

Synthesis of N-doped TiO2/SiO2/Fe3O4 magnetic nanocomposites as a novel purple LED illumination-driven photocatalyst for photocatalytic and photoelectrocatalytic degradation of naproxen: optimization and different scavenger agents study

N-doped TiO2/SiO2/Fe3O4 as a new magnetic photocatalyst that is active in visible light has been prepared by simple sol–gel method. The prepared samples were characterized by XRD, FESEM, EDX, TEM, BET, BJH, VSM, XPS, FT-IR, and DRS–UV/Vis analysis. The photocatalytic effect of synthesized samples on naproxen degradation was studied. The operational parameters were optimized through central composite design to achieve maximum efficiency. The optimum values for maximum efficiency were obtained at pH of 4.29, catalyst mass of 0.06 g, naproxen concentration of 9.33 mg L−1, and irradiation time of 217.06 min. At these optimum conditions, the maximum photocatalytic degradation percentages of naproxen were found to be 96.32% at desirability function value of 1.0. Coupling the electrical current with the photocatalytic process proved that the electrical current was considerably efficient in decreasing the degradation time of removing the naproxen from aqueous solutions. The photocatalytic activity of the nanoparticles was also studied under sunlight. Considering the results provided by UV–Vis spectrophotometry and total organic carbon, it was found that the prepared samples are extraordinarily efficient to degrade naproxen under both purple LED and solar lights. Furthermore, the effect of different scavenger agents on naproxen degradation has been studied.

First-principle study and Hirshfeld surface analysis on the effect of H2O, NH3 and H2S on structural, electronic, elastic, optical and thermodynamic properties of a novel high-energy crystal 2,4,6-triamino-5-nitropyrimidine-1,3-dioxide

2,4,6-Triamino-5-nitropyrimidine-1,3-dioxide (ICM-102) is a new high-energy crystal which has outstanding combination of performance, effects of three common small molecules H2O, NH3 and H2S on its molecular, crystal and electronic structures, and elastic, optical and thermodynamic properties of the compound were studied by the first-principle calculation and Hirshfeld surface analysis in this work. The results showed that H2O, NH3 and H2S do have significant effects on the structure and property of ICM-102, and different molecules made various influence on all kinds of properties. The low-sensitivity feature of ICM-102 was confirmed, and H2O molecule was found to further increase the stability of ICM-102 crystal obviously by enriching different kinds of close contacts. While the stabilization effect of NH3 and H2S on the ICM-102 was weaker than that of H2O and H2O also improved the density, stiffness, fracture strength and ductility, absorption to purple, blue, green and yellow lights, and thermodynamics parameters of ICM-102, but it decreased the band gap, anisotropy, plasticity, absorption to near ultraviolet and orange, red and infrared lights, and dielectric constant. However, different to H2O, NH3 and H2S reduced stiffness, fracture strength and ductility but increased the band gap of ICM-102. Besides, H2S was found to completely eliminate the region where light cannot be transmitted in the solid crystal ICM-102. This study may be helpful for using small molecules to stabilize the structure and adjust the property of energetic materials.

Cu-S codoping TiO2/SiO2 and TiO2/SiO2/Fe3O4 core-shell nanocomposites as a novel purple LED illumination active photocatalyst for degradation of diclofenac: the effect of different scavenger agents and optimization

Cu-S co-doped TiO2/SiO2 as a novel photocatalyst which is active in visible light was synthesized by simple so-gel method. Also, Fe3O4 nanoparticles were used as the core to create a magnetically separable photocatalyst. The prepared samples were characterized by XRD, BET, BJH, DRS-UV/Vis, PL, FESEM, EDX, TEM, XPS, and VSM analysis. The photocatalytic effect of synthesized samples was examined on diclofenac (as a model hazardous contaminant) degradation. The central composite design was employed to optimize the operational parameters including irradiation time, pH, photocatalyst mass, and diclofenac concentration, whose optimal values were 213.85 min, 4.31, 0.06 g, and 10.25 mg L−1 for irradiation time, pH, photocatalyst mass, and diclofenac concentration, respectively. Under the optimum conditions, the photocatalytic degradation percentages of diclofenac at desirability function value of 1.0 were found to be 99.56%. The photocatalytic activity of the nanoparticles was also studied under sunlight. Overall, the UV/Vis spectrophotometry and total organic carbon results indicated that the synthesized nanoparticles have an extraordinary photocatalytic activity for the degradation of diclofenac under both purple LED and solar lights. Furthermore, different scavenger agents were investigated.

Red light-promoted skin barrier recovery: Spatiotemporal evaluation by transepidermal potential.

The light-promoted recovery of epidermal barrier of skin was evaluated by the associated recovery of transepidermal potential (TEP), the potential difference between the surface and dermis of skin, by using porcine skin samples. An accelerated recovery of TEP was observed by irradiation of red light with the irradiance of 40 mW/cm2 and a duration of > 10 min. The influence of the light stimulation to the surroundings (~ 20 mm) was also observed. The irradiations of blue and purple lights were ineffective in accelerating the barrier recovery. These characteristics of the light stimulation would be useful for the design of effective and safe phototherapy devices for skin. The present study proves that the TEP can serve as a spatiotemporal indicator of the epidermal barrier function.

Photoluminescence studies of ZrO2:Tm3+/Yb3+ coatings formed by plasma electrolytic oxidation

Zirconia coatings doped with various contents of Tm3+ and Yb3+ were formed by the plasma electrolytic oxidation process of zirconium foils for 15 min in alkaline electrolyte containing Tm2O3 and Yb2O3 powders in different concentrations. The coatings were composed of monoclinic and tetragonal ZrO2 phases, but Tm and Yb incorporated into ZrO2 coatings induces phase transformation from monoclinic phase to tetragonal phase. The excitation photoluminescence (PL) spectra of ZrO2:Tm3+/Yb3+ coatings were featured by a broad band at around 280 nm related to zirconia host, and a peak at around 359 nm corresponding to the 3H6→1D2 transition of Tm3+. The coatings were excited by the 280 nm and 359 nm incident light, resulting in a strong zirconia PL band, and 1D2→3F4 down-conversion luminescence of Tm3+, respectively. With 980 nm excitation and subsequent absorption by Yb3+, an up-conversion PL was observed. Emission at 799 nm is attributed to the 3H4→3H6 transition of Tm3+. PL spectra of samples doped with 8 different combinations of Tm3+ and Yb3+, allow the analysis of the responsible mechanisms and their presentation in the Jablonski diagram. CIE chromaticity coordinates were calculated, revealing dependence of the PL color upon the Tm3+/Yb3+ doping concentration and excitation light wavelength. By 280 nm and 359 nm excitation, the samples emit cyan and purple light, respectively.

Robust Photodetectable Paper from Chemically Exfoliated MoS2-MoO3 Multilayers.

Photodetectors, which are capable of detecting light with varied wavelength, have nowadays been widely applied onto emerging fields such as security, entertainment, healthcare, environment, and so on. As the one with a two-dimensional layered structure, molybdenum disulfide (MoS2) possesses striking optical and electrical properties that can be used in photodetecting, yet the challenges remain in terms of material processing, device fabrication simplicity, and enhancement of overall photodetection performance. In this work, a photodetectable paper based on a mixture of double-phased MoS2 (1T and 2H) and MoO3 was successfully fabricated through a straightforward route, that is, chemical exfoliation and deposition of MoS2 powder on a flexible cellulose ester membrane, followed by inkjet-printed PEDOT:PSS as electrodes. The obtained device shows varied sensitivity to the light with different wavelengths. Compared with that under green and red lights, the prepared photodetector has the highest internal quantum efficiency (0.063%) and responsivity (0.134 mA W-1), while having longest response/recovery time (17.5/15.3 s) when illuminated with purple light (405 nm). The achieved responsivity is much higher than other reported liquid exfoliation- and solution-derived MoS2 photodetectors. This is ascribed to (1) the enhanced photoelectron generation caused by both MoS2 and MoO3 and (2) the good electric conductivity and efficient charge transport caused by the metallic 1T MoS2. This work demonstrates the feasibility of fabricating the MoS2-based photodetector with excellent performance through a simple exfoliation/filtration and inject printing route, and the detailed study on the response to light with different wavelengths unveils the interaction between the device and the incident light, further broadening the potential applications of such design.

Phototaxis of Anguilla marmorata based on fish attracting technology of eel passage

Light trap is commonly used in protecting Anguilla marmorata resource and improving the attraction of eel passage entrance. In this study, a self-made multifunctional round pool was used to explore the phototaxis of elvers (A. marmorata) under three conditions. 3 W underwater landscape lamp was used as the light source. The results showed that the percentages of juvenile A. marmorata occurrence in light zone and dark zone were (8.7±0.3)% and (3.6±1.7)%, (8.4±0.2)% and (5.0±1.4)%, (9.0±0.2)% and (1.9±1.3)% respectively under three conditions. Moreover, most glass eel distributed in the light zone, while elver (or elver develop) distributed in the dark zone. The primary regions of fish occurrence and its percentages were yellow zone [(29.4±4.9)%], red zone [(24.1±3.9)%)] and purple zone [(17.2±4.0)%] for condition one, yellow zone [(29.4±3.3)%], purple zone [(25.2±3.7)%] and red zone [(18.2±2.9)%] for condition two, and red zone [(33.3±2.3)%], purple zone [(25.6±3.8)%] and yellow zone [(20.7±5.7)%] for condition three. Correspondingly, the top three regions of fish first entering were red, yellow and purple, red, purple and yellow, and red, purple and yellow, respectively. The number of entering and exiting for fish in those three color zones was between blue-green zone and colorful zone. Visual fatigue would occur for elvers with continuous exposure to red light or yellow light. Our results suggested that the phototaxis of elvers is dependent on their developmental stages. Glass eels have phototaxis and seem to be more interesting in red, yellow, and purple light. Light guidance fish is available in the entrance of eel passage, which can help glass eels find the migration channels.

Multiple luminescence spanning the UV to NIR regions of Tm3+-doped silica glass microspheres pumped by 1527 nm

Fluorescence spectra of Tm3+-doped silica glass microspheres under excitation of a continuous wave diode laser at 1527 nm were investigated. It showed rich upconversion emissions from the high-energy states of Tm3+ ions, which spanned from the ultraviolet (UV) to near-infrared (NIR). Analysis indicated that the purple light emission came from a six-photon upconversion process. What's more, a broadband fluorescence emission was observed in a wavelength range of 620–935 nm. The high power density was a main advantage by confining the light in the microsphere cavities. The multiple fluorescence upconversion emissions of Tm3+-doped silica glasses under ∼1550 nm excitation may open a new door to explore the future visible light communication technology.

Effect of light-emitting diodes (LEDs) on snow crab catch rates in the Barents Sea pot fishery

Abstract Snow crab (Chionoecetes opilio) has become an important species for the Norwegian seafood industry since its first commercial harvest in 2012. However, periodically catch rates can be low, causing a financial strain on the fishery. Thus, improving the catch rate of existing pot designs has the potential to significantly improve the profitability of fishing enterprises. In this study, we investigated whether the addition of low-powered purple and white light-emitting diode (LED) fishing lights inside the pots could improve catch rates of snow crab in the Barents Sea. Results showed that pots with purple lights harvested a 12.8% higher catch per unit effort (CPUE; number of crab per pot) of legal-sized crab, which was significantly more than the control pots (p = 0.035); pots with white lights did not catch significantly more crab (p > 0.05). Pots equipped with only light (no bait) caught very few crabs and were not considered a viable alternative. Although purple LEDs increased snow crab capture, the economic benefits of using underwater lights in pots remains unclear given the high capital investment required.

Influence of illumination on the greening and relative enzyme activity of garlic puree.

Garlic has attracted considerable attention because of its bactericidal and anticancer effects. However, the greening of garlic purees greatly affects the product quality. This study investigated the influence of light colors and power on the greening of garlic, and determined the key substances of garlic puree greening, including γ-glutamyl transpeptidase (γ-GT), thiosulfinate, and alliinase. Results showed that purple light source greatly affects greening power, γ-GT, and thiosulfinate. Illumination using a 3-W power lamp could reduce the production of thiosulfinate and alliinase and inhibit the green transformation reaction. Illumination using a 5-W power lamp greatly affected the thiosulfinate content and greening power, whereas that using a 7-W power lamp greatly influenced the γ-GT activity, porphobilinogen content, and alliinase content. Results showed that the green color of garlic puree is greatly affected by the illumination color and intensity, which provides theoretical support for the anti-greening of light garlic puree. PRACTICAL APPLICATION: Because garlic puree easily turns green during processing, which affects the product quality and economic value, this study uses controllable light source radiation to influence the greening of garlic puree, hoping to delay or even solve this problem and provide a new simple method to prevent garlic puree from turning greening.

Chemistry and biology of manganese carbon-releasing molecules containing thiosemicarbazone ligands

A series of manganese complexes bearing 6-nitropiperonal thiosemicarbazone ligands have been synthesized and characterized. The ligands differ by the alkyl substituent on the amine nitrogen. These complexes, formulated as Mn(CO)3(TSC)Br, where TSC represents the thiosemicarbazone ligand, show very rapid release of carbon monoxide upon exposure to light, establishing them as photoCORMs (light activated carbon monoxide-releasing molecules). The photo-reactivity profile of the complexes have been studied in detail using the myoglobin assay as a detection system for carbon monoxide. Three different wavelengths of light were used: 365 nm (UV), 405 nm (purple) and 435 nm (blue). It was observed that the half-life for the CO release was dependent on the wavelength of light. These half-lives were on the order of 10 to 100 seconds which is very fast for this type of complex. Typically, the half-lives increased with a decrease in the energy of the incident radiation. For the compound bearing the phenyl-substituted amine group, t½ (in seconds) was 44.54, 59.59 and 65.90 for the UV, purple and blue light respectively. The amount of CO released was also wavelength dependent, with higher energy wavelength generally releasing more CO. UV light caused 2 equivalents of CO to be released while roughly 1.5 and 1.0 equivalents were released for the purple and blue light respectively. The biological profile of the complexes were also studied using antibacterial and anticancer assays. Against both Gram-negative and Gram-positive bacteria, the complexes showed good growth inhibitory effects with minimum inhibitory concentration (MIC) values no higher than 50 μM and as low as 3.13 μM. More importantly, these estimated MIC values were noticeably reduced when the bacteria, incubated with the complexes, were irradiated. All four compounds displayed intrinsic cytotoxicity against HEK293T (kidney) and A549 (lung carcinoma) cell lines, as indicated by relatively efficient cell killing for CORMs without irradiation. Irradiation of treated cultures with short wavelength visible spectrum light augmented these cytotoxic effects.

Effects of light quality on carbon-nitrogen metabolism, growth, and quality of Chinese chives

We examined the effect of white + red (WR), white + blue (WB), white + green (WG), white + purple (WP) on the carbon-nitrogen metabolism, growth and quality of Chinese chives, with ‘Pingjiu 2’ as the material and white light (W) as the control. The results showed that photosynthetic rate (Pn) in WR treatment was significantly higher than that in the control (CK) and that there was no difference among WB, WG, WP and CK. The activity of RuBPCase in all the four treatments was higher than that in CK. Compared with other treatments, WR showed the highest total sugar content, then WP, with WB and WG showing the lowest. Compared with CK, sucrose phosphate synthase (SPS) activity in WR was higher, and lower in the other three treatments, especially the lowest in WB. WB showed the highest activity of sucrose synthetase (SS) and amylase (AMS), WR displayed the lowest as well as the similar or lower in WG or WP compared with CK. These results implied that the increases of the proportion of red and purple light could improve carbon assimilation and transformation and thus accelerate sugar accumulation of Chinese chives. The content of total nitrogen, protein nitrogen, the activities of NR, GS and GOGAT of WB were the highest among all the treatments. The GDH activity of WB was the lowest and notably lower compared with CK. WR showed the lower contents of total nitrogen, protein nitrogen, the activities of NR and GS, and higher activities of GOGAT and GDH than those in CK, while the GDH activity of WR was the highest. WG showed lower total nitrogen, no-protein nitrogen content, and GDH activity, but higher protein nitrogen, NR and GOGAT activities than those in CK. Compared with the control, WP showed the similar results as WG, besides the higher GS activity, with most of these parameters in WP being better than in WG. These results indicated that blue, purple and green light could promote nitrogen metabolism, while red light might inhibit protein synthesis in Chinese chives. The growth of Chinese chives was much better under red and purple light, but worse under blue light, which led to thinner leaves and lower growth mass. Chinese chives of WP with the lowest crude fiber content showed the optimal comprehensive quality. Therefore, purple light exhibited the best effect on the growth of Chinese chives.