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1. Designing Structural-Color Patterns Composed of Colloidal Arrays

Author:
Kim, Jong Bin; Lee, Seung Yeol; Lee, Jung Min; Kim, Shin-Hyun
Source:
ACS applied materials & interfaces 2019 v.11 no.16 pp. 14485-14509
ISSN:
1944-8252
Subject:
pigments,   etc   ; color; crystals; nanomaterials; optical properties; toxicity;     Show all 6 Subjects
Abstract:
... Structural coloration provides a great potential for various applications due to unique optical properties distinguished from conventional pigment colors. Structural colors are nonfading, iridescent, and tunable, which is difficult to achieve with pigments. In addition, structural color is potentially less toxic than pigments. However, it is challenging to develop structural colors because elabora ...
DOI:
10.1021/acsami.8b21276

2. Study on the equivalent luminance of luminous fibers in mesopic vision

Author:
Yan, Yanhong; Gu, Bingfei; Du, Lei; Zhu, Yanan
Source:
The journal of the Textile Institute 2019 v.110 no.2 pp. 311-316
ISSN:
1754-2340
Subject:
pigments,   etc   ; color; fabrics; melting; polyamides; spinning; vision;     Show all 7 Subjects
Abstract:
... Luminous fiber is a kind of new functional material which is prepared by melt spinning process adding colored pigments and luminous material into polyamide fiber. Based on the experimental data of the emission spectra and the test luminance of the luminous fibers, the effect of emissive colors of luminous fibers on the equivalent luminance in mesopic vision is analyzed. The results show that the e ...
DOI:
10.1080/00405000.2018.1478701

3. Insights into eyespot color-pattern formation mechanisms from color gradients, boundary scales, and rudimentary eyespots in butterfly wings

Author:
Iwata, Masaki; Otaki, Joji M.
Source:
Journal of insect physiology 2019 v.114 pp. 68-82
ISSN:
0022-1910
Subject:
pigments,   etc   ; Junonia; butterflies; color; insect physiology; models; ploidy; wings;     Show all 8 Subjects
Abstract:
... Butterfly eyespot color patterns are traditionally explained by the gradient model, where positional information is stably provided by a morphogen gradient from a single organizer and its output is a set of non-graded (or graded) colors based on pre-determined threshold levels. An alternative model is the induction model, in which the outer black ring and the inner black core disk of an eyespot ar ...
DOI:
10.1016/j.jinsphys.2019.02.009

4. Extended conjugation in stilbenoid squaraines

Author:
Meier, Herbert
Source:
Zeitschrift für Naturforschung 2019 v.74 no.3 pp. 241-254
ISSN:
1865-7117
Subject:
pigments,   etc   ; absorption; biosensors; chloroform; dyes; materials science; photochemotherapy; solvents;     Show all 8 Subjects
Abstract:
... Squaraines, two-fold condensation products in 1,3-position of squaric acid, represent dyes or pigments of high actuality. After their first boom in electrophotography diverse applications are presently studied in a wide area of research, which reaches from electrooptical materials to biosensors and compounds used in photodynamic therapy. Absorption and/or emission ranges in the NIR are mandatory f ...
DOI:
10.1515/znb-2018-0260

5. Enlarged Color Gamut Representation Enabled by Transferable Silicon Nanowire Arrays on Metal–Insulator–Metal Films

Author:
Kim, Yeong Jae; Yoo, Young Jin; Lee, Gil Ju; Yoo, Dong Eun; Lee, Dong Wook; Siva, Vantari; Song, Hansung; Kang, Il Suk; Song, Young Min
Source:
ACS applied materials & interfaces 2019 v.11 no.12 pp. 11849-11856
ISSN:
1944-8252
Subject:
pigments,   etc   ; color; colorimetry; durability; dyes; nanowires; polymers; reproduction; semiconductors; silicon;     Show all 10 Subjects
Abstract:
... Artificial structural colors arising from nanosized materials have drawn much attention because of ultrahigh resolution, durability, and versatile utilizations compared to conventional pigments and dyes. However, the limited color range with current approaches has interrupted the supply for upcoming structural colorimetric applications. Here, we suggest a strategy for the widening of the color gam ...
DOI:
10.1021/acsami.8b21554

6. Maltose syrup residue as the substrate for Monascus pigments production

Author:
de Oliveira, Camila Fernanda Dias; da Costa, Jaquelinne Pires Vital; Vendruscolo, Francielo
Source:
Biocatalysis and agricultural biotechnology 2019 v.18 pp. 101101
ISSN:
1878-8181
Subject:
pigments,   etc   ; Monascus ruber; byproducts; fungi; industry; maltose; pH; syrups;     Show all 8 Subjects
Abstract:
... The objective of this study was to determine the effect of pH on the growth rate and production of pigments by Monascus ruber from maltose syrup residue as a substrate. The cultivations were carried out in solid and submerged media under different pH conditions. The highest radial growth rate occurred when the Monascus ruber was cultivated at pH 6.5 and the production of yellow pigments occurred a ...
DOI:
10.1016/j.bcab.2019.101101

7. The cellular and genetic basis of structural colour in plants

Author:
Airoldi, Chiara A.; Ferria, Jordan; Glover, Beverley J
Source:
Current opinion in plant biology 2019 v.47 pp. 81-87
ISSN:
1369-5266
Subject:
plant pigments,   etc   ; color; flowers; fruits; leaves; nanomaterials; tissues;     Show all 7 Subjects
Abstract:
... While the pathways that produce plant pigments have been well studied for decades, the use by plants of nanoscale structures to produce colour effects has only recently begun to be studied. A variety of plants from across the plant kingdom have been shown to use different mechanism to generate structural colours in tissues as diverse as leaves, flowers and fruits. In this review we explore the cel ...
DOI:
10.1016/j.pbi.2018.10.002

8. Vertebrate Eye Melanosomes and Invertebrate Eye Ommochromes as Antioxidant Cell Organelles: Part 2

Author:
Ostrovsky, M. A.; Dontsov, A. E.
Source:
Biology bulletin of the Russian Academy of Sciences 2019 v.46 no.1 pp. 105-116
ISSN:
1062-3590
Subject:
pigments,   etc   ; antioxidants; eyes; humans; invertebrates; organelles; screening; vision;     Show all 8 Subjects
Abstract:
... A review of our own data and published material on the screening pigments of the eyes of vertebrates and invertebrates and the human eye, i.e., melanosomes and ommochromes, is presented. The role of these pigments in the vision of vertebrates and invertebrates as antioxidant organelles is considered, as is the role of melanosomes in the physiology, aging, and pathology of the human eye. ...
DOI:
10.1134/S1062359019010084

9. Do carotenoid‐based ornaments entail resource trade‐offs? An evaluation of theory and data

Author:
Koch, Rebecca E.; Hill, Geoffrey E.
Source:
Functional ecology 2018 v.32 no.8 pp. 1908-1920
ISSN:
0269-8463
Subject:
pigments,   etc   ; Aves; antioxidants; carotenoids; color;     Show all 5 Subjects
Abstract:
... Within the past several decades, resource trade‐offs have emerged as the commonly accepted explanation for how carotenoid‐based coloration links to individual performance. However, the literature on carotenoid signalling is inconsistent in how carotenoid resource trade‐offs are defined, assessed and interpreted. We provide a clear statement of the resource trade‐off hypothesis for explaining the h ...
DOI:
10.1111/1365-2435.13122

10. Toxicity of nanosilver and fumonisin B1 and their interactions on duckweed (Lemna minor L.)

Author:
Radić, Sandra; Domijan, Ana-Marija; Glavaš Ljubimir, Katarina; Maldini, Krešimir; Ivešić, Martina; Peharec Štefanić, Petra; Krivohlavek, Adela
Source:
Chemosphere 2019 v.229 pp. 86-93
ISSN:
0045-6535
Subject:
pigments,   etc   ; Lemna minor; additive effect; enzyme activity; fumonisin B1; lipid peroxidation; nanosilver; nutrients; photosynthesis; phytotoxicity; silver;     Show all 11 Subjects
Abstract:
... In the environment co-contamination of several toxicants commonly occurs. However, toxicological studies usually are focused on only one toxicant. The aim of this study was to investigate toxicity of silver nanoparticles (AgNP) and mycotoxin fumonisin B1 (FB1) and their possible interactions as well as to explore tentative mechanism of their toxic effect. Duckweed (Lemna minor L.) was treated with ...
DOI:
10.1016/j.chemosphere.2019.05.004

11. Phytoextraction capability of Azolla pinnata in the removal of rhodamine B from aqueous solution: artificial neural network and random forests approaches

Author:
Kooh, Muhammad Raziq Rahimi; Dahri, Muhammad Khairud; Lim, Linda B. L.; Lim, Lee Hoon; Lee, Sze Ling
Source:
Applied water science 2019 v.9 no.4 pp. 80
ISSN:
2190-5487
Subject:
plant pigments,   etc   ; Azolla pinnata; algorithms; aqueous solutions; artificial intelligence; dyes; neural networks; pH; phytoaccumulation; rhodamines;     Show all 10 Subjects
Abstract:
... This study used live Azolla pinnata (AP) to remediate rhodamine B (RB) from aqueous solutions via the phytoextraction method, and machine learning algorithms such as artificial neural networks and random forests were used as predictive models. The pH was found to have a major influence on the phytoextraction process, and the AP dosage can change the pH of the aqueous solution. The optimum conditio ...
DOI:
10.1007/s13201-019-0960-6

12. Highly charged, magnetically sensitive magnetite/polystyrene colloids: synthesis and tunable optical properties

Author:
Lu, Xuegang; Chen, Changhao; Wen, Xiaoxiang; Han, Ping; Jiang, Wenfeng; Liang, Gongying
Source:
Journal of materials science 2019 v.54 no.10 pp. 7628-7636
ISSN:
0022-2461
Subject:
pigments,   etc   ; aqueous solutions; biosensors; colloids; color; dyes; magnetic fields; magnetite; nanoemulsions; optical properties; polymerization; polystyrenes;     Show all 12 Subjects
Abstract:
... Highly charged monodisperse magnetite/polystyrene colloidal particles are successfully synthesized by using a miniemulsion polymerization method. The particles, with high saturation magnetization (Mₛ ≈ 38.6 emu g⁻¹), display high sensitivity to the magnetic field and can self-assemble into periodically ordered colloidal structure in aqueous solution, thus diffract light strongly, under magnetic in ...
DOI:
10.1007/s10853-019-03445-4

13. Nature and nurture: confluence of pathway determinism with metabolic and chemical serendipity diversifies Monascus azaphilone pigments

Author:
Chen, Wanping; Feng, Yanli; Molnár, István; Chen, Fusheng
Source:
Natural product reports 2019 v.36 no.4 pp. 561-572
ISSN:
1460-4752
Subject:
pigments,   etc   ; Monascus; biochemical pathways; biogenesis; biosynthesis; food colorants; fungi; secondary metabolites;     Show all 8 Subjects
Abstract:
... Covering: up to June 2018 Understanding the biosynthetic mechanisms that generate the astounding structural complexity and variety of fungal secondary metabolites (FSMs) remains a challenge. As an example, the biogenesis of the Monascus azaphilone pigments (MonAzPs) has remained obscure until recently despite the significant medical potential of these metabolites and their long history of widespre ...
DOI:
10.1039/c8np00060c

14. Nanoencapsulation of carotenoids within lipid-based nanocarriers

Author:
Rostamabadi, Hadis; Falsafi, Seid Reza; Jafari, Seid Mahdi
Source:
Journal of controlled release 2019 v.298 pp. 38-67
ISSN:
0168-3659
Subject:
pigments,   etc   ; autotrophs; bioavailability; carotenoids; human nutrition; ingredients; lipids; nanocapsules; nanocarriers; nanoemulsions; nanoparticles; solubility;     Show all 12 Subjects
Abstract:
... Carotenoids, as promising functional components in human diet, are gaining immense importance todays. Apart from their pivotal importance in photosynthetic organisms or as natural pigments, they are typically referred to as health-promotional ingredients, which offer several beneficial attributes. However, their sensitivity against environmental and process stresses, low-water solubility, as well ...
DOI:
10.1016/j.jconrel.2019.02.005

15. In vitro demethoxycarbonylation of various chlorophyll analogs by a BciC enzyme

Author:
Teramura, Misato; Harada, Jiro; Tamiaki, Hitoshi
Source:
Photosynthesis research 2019 v.139 no.1-3 pp. 163-171
ISSN:
0166-8595
Subject:
pigments,   etc   ; Chlorobium tepidum; bacteriochlorophyll; biosynthesis; carboxylic ester hydrolases; enzyme activity; moieties; substrate specificity;     Show all 8 Subjects
Abstract:
... Unique light-harvesting antennas in the green sulfur bacterium Chlorobaculum tepidum, called chlorosomes, consist of self-aggregates of bacteriochlorophyll (BChl) c. In the biosynthesis of BChl c, BciC demethoxycarbonylase removes the C13²-methoxycarbonyl group to facilitate the self-aggregation of BChl c. We previously reported the in vitro BciC-enzymatic reactions and discussed the function of t ...
DOI:
10.1007/s11120-018-0573-1

16. Reduction of Listeria innocua in fresh-cut Chinese cabbage by a combined washing treatment of sweeping frequency ultrasound and sodium hypochlorite

Author:
Alenyorege, Evans Adingba; Ma, Haile; Ayim, Ishmael; Aheto, Joshua Harrington; Hong, Chen; Zhou, Cunshan
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2019 v.101 pp. 410-418
ISSN:
0023-6438
Subject:
pigments,   etc   ; Chinese cabbage; Listeria innocua; color; fresh-cut produce; leaves; microstructure; sodium hypochlorite; texture; washing;     Show all 10 Subjects
Abstract:
... The investigation compared the efficiency of single treatments and their combinations in reducing Listeria innocua on fresh-cut Chinese cabbage. Samples were inoculated and treated separately with sweeping frequency ultrasound (SFUS; 28 ± 2–68 ± 2 kHz) and sodium hypochlorite solution (NaOCl; 20–100 mg/L) and their combinations. Treatments were evaluated based on attainable bacterial reduction and ...
DOI:
10.1016/j.lwt.2018.11.048

17. Effects of different pH regulators on the color properties of attapulgite/BiVO4 hybrid pigment

Author:
Wang, Xiaowen; Mu, Bin; Zhang, Anjie; An, Xingcai; Wang, Aiqin
Source:
Powder technology 2019 v.343 pp. 68-78
ISSN:
0032-5910
Subject:
pigments,   etc   ; ammonia; annealing; bismuth; color; dyes; nanoparticles; pH; powders; sodium bicarbonate; sodium carbonate; sodium hydroxide; toxicity;     Show all 13 Subjects
Abstract:
... Four different pH regulators including NaOH, Na2CO3, NaHCO3 and NH3·H2O were employed to prepare attapulgite doped bismuth yellow hybrid pigments by aqueous precipitation followed by an annealing process. Different hybrid pigments derived from different pH regulators had different color properties, and it might be related to the generated products in the process of adjusting pH, which further affe ...
DOI:
10.1016/j.powtec.2018.11.003

18. Do the presence and physiological stage of algal mats affect the meiobenthic community in a tropical estuary?

Author:
Neves, Júlia R.; Valença, Ana P.M.C.; Botter-Carvalho, Mônica L.; Santos, Paulo J.P.
Source:
Journal of experimental marine biology and ecology 2019 v.511 pp. 75-81
ISSN:
0022-0981
Subject:
pigments,   etc   ; Copepoda; algae; carbohydrates; estuaries; fauna; littoral zone; organic matter; photosynthesis; proteins; sediments; species richness;     Show all 12 Subjects
Abstract:
... The effects of compacted algal mats growing attached to sediments on the abundance and community structure of intertidal sediment meiofauna and harpacticoid copepod assemblages were evaluated on a tropical estuarine mudflat. Differences in fauna based on the presence of algae (within vs. outside the algal patches) and the physiological stages of the algae (live vs. decomposing algal patches) were ...
DOI:
10.1016/j.jembe.2018.11.010

19. Effects of nonionic surfactants on pigment excretion and cell morphology in extractive fermentation of Monascus sp. NJ1

Author:
Yang, Xuelian; Dong, Ye; Liu, Guorong; Zhang, Chan; Cao, YanPing; Wang, Chengtao
Source:
Journal of the science of food and agriculture 2019 v.99 no.3 pp. 1233-1239
ISSN:
0022-5142
Subject:
pigments,   etc   ; Monascus; biocompatibility; droplets; excretion; lipids; membrane permeability; mycelium; nonionic surfactants; secretion; submerged fermentation; temperature;     Show all 12 Subjects
Abstract:
... BACKGROUND: Different nonionic surfactants in submerged fermentation of Monascus sp. demonstrate significant differences regarding increasing pigment yield. In this study, 15 surfactants from five series were analyzed to investigate the influence of nonionic surfactants on Monascus pigments, with the aim of simultaneously obtaining a novel nonionic surfactant. RESULTS: Addition of the novel surfac ...
DOI:
10.1002/jsfa.9295

20. Growth and biochemical responses of tropical and subtropical strains of Gracilaria domingensis (Gracilariales, Rhodophyta) to temperature and irradiance variations

Author:
Castro, Julia Z.; Yokoya, Nair S.
Source:
Journal of applied phycology 2019 v.31 no.1 pp. 607-613
ISSN:
0921-8971
Subject:
pigments,   etc   ; Gracilaria domingensis; chlorophyll; coasts; females; gametophytes; light intensity; photons; phycocyanin; phycoerythrin; subtropics; temperature; tropics;     Show all 13 Subjects
Abstract:
... Gracilaria domingensis (Kützing) Sonder ex Dickie is widely distributed in the Brazilian coast and is one of a few Gracilaria species with occurrence in the southern region of the country. Its commercial importance is in the use in human food (in natura) and knowledge of the physiology is fundamental to make its cultivation successful. The objectives of the present work were to determine the limit ...
DOI:
10.1007/s10811-018-1520-4