Minerals
·
2022
·Vol. 12
·期 8
·920
·
IF 2.818
Qingchao Zhou,Chengsi Wang,Andy-Hsitien Shen
Owing to the high market values of natural sunstones in Oregon, a kind of artificially diffused red feldspar exhibited at the Tucson Exhibition at the beginning of this century, whose color origin is the same as that of natural sunstone (copper nanoparticles). However, the details of the artificial diffusion process are less disclosed, there is no systematic method to obtain such gemstones. In this paper, we developed the high-temperature copper diffusion process for the surface recoloring of faceted labradorites, which are partly buried in the diffusant. By optimizing the experimental parameters of high-temperature copper diffusion, we successfully recolored the faceted labradorites to red and light red. The gemological and spectroscopic characteristics of the recolored faceted labradorite were further characterized. The red and light-red faceted labradorites exhibited the unique surface plasmon resonance absorption peaks of copper nanoparticles near 580 nm, which is the origin of red color. The typical inclusions formed in the faceted labradorite is in the shape of “fire cloud”. The interface of red and light-red faceted labradorite that is in contact with the diffusant is less contaminated, we believe that the contamination could be further reduced or eliminated by optimizing the high-temperature copper diffusion process. The way that the sample is in contact with the diffusant partly is versatile and promising in the surface treatment of materials that have already been processed.Keywords:labradorite;faceted;copper diffusion;recoloring
研究领域:
矿物学
·
宝石学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2019
·
IF 1.859
Zhiqiang Xie,Qingqing Liu,Bingxin Lu,Jin Zhai,Xungang Diao
Nickel oxide (NiO) nanocrystals were fabricated by one-pot synthesis under the atmosphere of O 2 . Transmission Electron Microscope (TEM) test show that the average diameter was ca. 3 nm. X-Ray Diffraction (XRD) reveal the NiO nanocrystals were cubic structure. The as-prepared NiO nanocrystals were then surface-modified by pyridine to enhance their electrochromic (EC) performances. Measurement of EC properties of NiO nanocrystals was performed by testing NiO thin film electrode based on NiO nanocrystals in LiClO 4 /PC electrolyte with applied voltages of ±1.5 V, 50 s respectively. The results show that nanocrystals based NiO electrode have good EC performances. Optical modulation rate (ΔT) was 41.5% at the wavelength of 550 nm. Coloration switching time was 1.77 s and coloration efficiency (CE) was 114.7 cm 2 ·C −1 .
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Horticultural Plant Journal
·
2025
·
IF 6.2
Yukuo Li,Zhe Song,Xu Zhan,Miaomiao Lin,Xiaohan Li,Ran Wang,Leiming Sun,Hong Gu,Feng Wei,Jinbao Fang,Xiujuan Qi
In kiwifruit ( Actinidia arguta ), fruit coloration is typically accompanied by ripening; however, the intrinsic connection between these two processes remains unclear. In this study, we found that ethylene and auxin accelerated and suppressed fruit coloration and ripening, respectively, in A. arguta . ETHYLENE INSENSITIVE 3-LIKE 2 (AaEIL2) and ETHYLENE RESPONSIVE FACTOR (AaERF059) were mined and identified using yeast two-hybrid library screening and transcriptome analysis. AaEIL2, specifically induced to high expression by ethylene, was confirmed as a transcription factor that positively regulates coloration and ripening by targeting AaLDOX (leucoanthocyanidin dioxygenase involved in anthocyanin biosynthesis) and AaPG18 (polygalacturonase involved in cell wall degradation) based on its subcellular localization in Arabidopsis protoplasts, stable genetic transformation in transgenic tomato, and yeast one-hybrid and luciferase activity assays. AaERF059 also responds to ethylene and regulates ethylene-/auxin-mediated fruit coloration and ripening by targeting the downstream genes AaACS2 (ACC synthase, which is involved in ethylene biosynthesis) and AaGH3 (Gretchen-Hagen 3, which is involved in the auxin pathway). Overall, AaEIL2 and AaERF059 regulate ethylene-and auxin-mediated fruit coloration and ripening by maintaining a dynamic balance in a positive and negative regulatory manner. Our results not only identified key genes but also established an intrinsic connection between fruit coloration and ripening in A. arguta .
研究领域:
植物学
·
分子生物学
·
遗传学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF EXPERIMENTAL BOTANY
·
2018
·Vol. 69
·期 10
·2595-2608
·
IF 5.354
Luo Huifeng,Dai Cheng,Li Yongping,Feng Jia,Liu Zhongchi,Kang Chunying
The red color of the foliage and fruit in strawberry comes from anthocyanins stored in the vacuole; however, how this anthocyanin accumulation is regulated remains unclear. A reduced anthocyanin in petioles (rap) mutant was identified in an N-ethyl-N-nitrosourea (ENU) mutagenized population of YW5AF7, a white-fruited variety of the wild strawberry Fragaria vesca. The causative mutation was identified to be a premature stop codon in a glutathione S-transferase (GST) gene. In addition to the foliage coloration, RAP also mediates fruit pigmentation and acts downstream of the fruit-specific transcription factor FvMYB10. Among all eight GST genes in the same subfamily, RAP is most abundantly expressed in the ripening fruit. Expression analysis and transient expression assays demonstrated that RAP is the principal transporter of anthocyanins among the paralogs. Moreover, domain-swap experiments showed that both the N- and C-terminals of RAP are essential for the binding capability of anthocyanins. In addition, transient knock-down of RAP resulted in reduced fruit coloration in cultivated strawberry. Collectively, our results demonstrate that RAP encodes the principal GST transporter of anthocyanins in the strawberry foliage and fruit, and it could be modified to alter the fruit color in strawberry.
研究领域:
植物学
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遗传学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jian He,Feng Jiang,Sihan Yang,Longjiao Chang,Bin Wang,Xuejiao Wang
Currently black pigments face challenges of non-ideal luminance factor (L-value), and the presence of potentially hazardous cobalt (Co). A novel stable Na 2 NiMn 2 O 6 (NNMO) black pigment is reported in this work. The pigment exhibits excellent properties, including an ideal low L-value, Co-free composition, and stable bright black hue. A range of analytical techniques are employed to evaluate the properties of the novel pigment, including XRD, SEM, EDS-Mapping, XPS, UV–V is , and CIELAB colorimetry. The chromaticity parameters of the black pigment are L∗ = 24.39, a∗ = 0.21, and b∗ = 0.39. The bright black color of the pigment and the glazing sample was attributed to the combined contributions of Ni 2+ and Mn 3+ /Mn 4+ in the Na 2 NiMn 2 O 6 pigment and NiMnO 3 , Na 4 Mn 9 O 18 , Mn 2 O 3 ingredients in the glazing sample. This research offering valuable guidance for the development of novel, Co-free, and low L-value black pigment.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Pigment & Resin Technology
·
2023
·Vol. 53
·期 5
·638-649
·
IF 1.4
Shan Peng,Ranran Yang,Binglong Lei,Yun Gao,Renhua Chen,Xiaohong Xia,Kevin P. Homewood
PurposeThis paper aims to systematically demonstrate a methodology to determine the relative and absolute encapsulation efficiencies (αReandαAb) for thermally- and chemically-robust inorganic pigments, typically like ZrSiO4-based pigments, thereby enhancing their coloring performance.Design/methodology/approachThe authors designed a route, surplus alkali-decomposition and subsequently strong-acid dissolution (SAD2) to completely decompose three classic zircon pigments (Pr–ZrSiO4, Fe2O3@ZrSiO4and CdS@ZrSiO4) into clear solutions and preferably used inductively coupled plasma-optical emission spectrometry (ICP-OES) to determine the concentrations of host elements and chromophores, thereby deriving the numeric data and interrelation ofαReandαAb.FindingsZircon pigments can be thoroughly decomposed into some dissoluble zirconate–silicate resultants by SAD2 at a ratio of the fluxing agent to pigment over 6. ICP-OES is proved more suitable than some other quantification techniques in deriving the compositional concentrations, thereby the values ofαReandαAb, and their transformation coefficientKRA, which maintains stably within 0.8–0.9 in Fe2O3@ZrSiO4and CdS@ZrSiO4and is slightly reduced to 0.67–0.85 in Pr–ZrSiO4.Practical implicationsThe SAD2 method and encapsulation efficiencies are well applicable for both zircon pigments and the other pigmental or non-pigmental inhomogeneous systems in characterizing their accurate composition.Originality/valueThe authors herein first proposed strict definitions for the relative and absolute encapsulation efficiencies for inorganic pigments, developed a relatively stringent methodology to determine their accurate values and interrelation.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2019
·Vol. 191
·期 2
·605-622
·
IF 2.14
Bai Rubing,Yu Yuanyuan,Wang Qiang,Shen Jinsong,Yuan Jiugang,Fan Xuerong
Chitosan oligosaccharide (COS), a water-soluble carbohydrate obtained from chemical or enzymatic hydrolysis of chitosan, has similar structure and properties to non-toxic, biocompatible, and biodegradable chitosan. However, COS has many advantages over chitosan due to its low molecular weight and high water solubility. In the current work, COS was incorporated in the laccase-catalyzed polymerization of hydroquinone. The laccase-catalyzed polymerization of hydroquinone with or without COS was investigated by using simple structure of glucosamine hydrochloride as an alternative to COS to understand the mechanism of COS-incorporated polymerization of hydroquinone. Although polyhydroquinone can be regarded as the polymeric colorant with dark brown color, there is no affinity or chemical bonding between polyhydroquinone and cotton fibers. Cotton fabrics were successfully in-situ dyed into brown color through the laccase-catalyzed polymerization of hydroquinone by incorporating with COS as a template. The presence of COS enhanced the dye uptake of polyhydroquinone on cotton fibers due to high affinity of COS to cotton and covalent bonding between COS and polyhydroquinone during laccase catalysis. This novel approach not only provides a simple route for the biological coloration of cotton fabrics but also presents a significant way to prepare functional textiles with antibacterial property.
研究领域:
生物化学
·
纺织科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2017
·
IF 2.429
Dongri WANG,Yongqing ZHAO,Shiyong YU
A series of cerium sulfides were successfully prepared using commercially available nanoscale CeO 2 as precursor, anhydrous Na 2 CO 3 as dopants, CS 2 as sulfur source, under 600–800 °C, respectively. Properties of samples were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and spectrophotometry. The results showed that corresponding γ-Ce 2 S 3 with small size was obtained by using nanoscale CeO 2 as precursor; pure phase γ-Ce 2 S 3 could be obtained under low temperature of 700 °C. Coloring properties of γ-Ce 2 S 3 obtained under 800 °C were studied by researching γ-Ce 2 S 3 /PE and γ-Ce 2 S 3 /PVC composites, respectively. The results showed that satisfied coloring effects to PE and PVC were obtained by using 0.5 phr and 0.2 phr γ-Ce 2 S 3 , respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yongqing Wang,Fanbing Lai,Qikun Wang,Qinghua Long,Chao Wang,Wenjie Zhang,Qibing Chang
In this paper, high color performance Pr cation doped zircon (Pr-ZrSiO 4 ) yellow pigment has been prepared by inorganic sol-gel method. Meanwhile, the detailed process parameters for preparation of Pr-ZrSiO 4 pigment were systematically investigated. The research results indicate that the optimal process parameters are Pr-doping amount of 6 mol.%, calcination temperature of 900 °C, holding time of 2 h and Si/Zr ratio of 1.05. The synthesized Pr-ZrSiO 4 pigment shows an intense yellow hue, which chromatic parameters are L* = 81.84, a* = 4.36, b* = 70.55 and C* = 70.68. Moreover, the pigment shows outstanding tinting performance for ceramic glaze , suggesting its attractive application in ceramic decoration. XPS analysis demonstrated that the Pr cations in the Pr-ZrSiO 4 pigment consists of two valence states, namely trivalent and tetravalent. Finally, heterogeneously distributed behavior of Pr cations in the pigment was discovered.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
高影响因子
DYES AND PIGMENTS
·
2021
·
IF 4.889
Kui Wang,Qi-Qi Wang,Mi-Ni Wang,Ya-Jing Xie,Xuan Qiao,Siyang Xing,Bolin Zhu
In this work, a water-soluble fluorescent and colouring macrocycle deprotonated-calixpyridinium was obtained by a simple pH modulatory strategy. This type of fluorescent and colouring macrocyclic skeleton as host will be certainly applied in a large number of fields, especially in the sensing area. Herein, a near white-light emission was carried out by an innovative method of deprotonated-calixpyridinium-based host–guest interactions employing camptothecin sodium as the guest. Moreover, the pH-responsive luminescence color change of calixpyridinium–camptothecin sodium complex was further applied for the high selective detection of arginine in pure water and real samples, which is quite important in the accurate diagnosis of various disorders. The newfound pH-dependent luminescent and colouring properties of calixpyridinium will also provide an alternative idea for the development of other novel fluorescent and colorimetric macrocyclic sensors.
研究领域:
分析化学
·
生物传感
·
医学诊断
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaofeng Wang,Zhuan Fu,Wanjin Hu,Mengyao Cai,Dandan Zhong,Chunhua Zhang,Shuishi Tan,Shuxiao Zhang,Sijie Zhou,Lixin Du,Liangjun Xia
The coloration of cotton fabric with wild application has attracted extensive attention to cotton fiber , due to the efficient utilization of renewable industrial crops. However, the utilization of rapid in-situ synthesis of metal oxides with color is inadequate. Herein, a rapid strategy for constructing multi-color cotton fabric is designed to propose a rapid in-situ synthesis of metal oxides on the surface of cotton fiber in a high-temperature organic solvent system within 40 s. The colored metal oxide of cuprous oxide (Cu 2 O), tungsten trioxide (WO 3 ), and cobalt molybdate (CoMoO 4 ) are in-situ synthesis on the surface of cotton fibers by different precursor solutions. The bright-colored cotton fabrics are developed within 40 s as well as satisfactory K/S values of 7.53, 2.67, and 0.98, for Cu 2 O (Cu 2 O-Cotton), WO 3 (WO 3 -Cotton), and CoMoO 4 (CoMoO 4 -Cotton), respectively. The stable structure of the various colored cotton fabrics is demonstrated by level 3 of rubbing fastness and washing fastness, and acceptable air permeability . Moreover, assigned to the nature of particles, the colored cotton fabrics are fabricated with thermal stability and better ultraviolet protection factors. The rapid in-situ metal oxides with precursor solutions provide a time- and water-saving method to prepare colored cotton fabrics, which exhibits an ideal efficiency, and practical potential application for coloring and functionalization.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 21
·12977-12983
·
IF 3.108
Weini Jia,Qiang Wang,Xuerong Fan,Aixue Dong,Yuanyuan Yu,Ping Wang
Bio-inspired or bionic coloration of fiber assemblies based on chemical oxidation of phenolics has gained more and more attention in recent years. To overcome the challenges of protecting the ecology and environment in textile processes, a novel approach for the coloration of silk fabrics via laccase-mediated in situ oxidation of dopa (dihydroxy phenylalanine) has been investigated in this work. In view of the fact that laccase is able to catalyze the oxidation of benzenediol followed by polymerization to produce strongly colored phenolic polymers, two biological coloration processes of silk fabrics based on in situ oxidation of dopa using laccase were investigated: (i) the adsorption of silk fabrics with dopa, followed by further catalysis of laccase and (ii) the simultaneous laccase-mediated polymerization and coloration of silk fabrics. Dosages of laccase and incubation time were evaluated in order to increase the color depth and fastness of the silk fabrics. The increase in laccase dosage and reaction time allowed improvement in the depth of the final color. The properties of colored silk fabrics were evaluated in terms of UV-protection and color fastness. Finally, the binding of the polymers of dopa with silk fibers was verified by Fourier transform infrared spectroscopy (FT-IR). The silk fabrics treated with laccase/dopa by a one-step process obtained K/S values of 16.935, light fastness of 4–5 level, and UPF of 100+. SEM and AFM observations showed that the surface of silk samples treated with laccase/dopa had numerous small flakes, which can be regarded as the melanin particles of dopa molecules, attached by the grafting reaction. The FT-IR analysis showed that the functional groups on the surfaces of laccase/dopa-treated silk fabrics were changed with the introduction of carbonyl groups. The results of XPS showed that the elemental composition of the surface of laccase/dopa-treated silk fabrics was similar to oral melanin. This dyeing technique could also be extended to the treatments of other types of fibers in textile dyeing and finishing processes.
研究领域:
纺织科学
·
生物化学
✓ 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）