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Статті в журналах з теми "Pigments"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

Bacarji, Edgar, Fabíolla Xavier Rocha Ferreira, Larissa Alves de Souza, and Henrique Santiago de Camargo. "BLOCOS MODULARES NÃO CONVENCIONAIS COM SUBPRODUTOS DE BRITAGEM: INFLUÊNCIA DE PIGMENTOS INORGÂNICOS." REEC - Revista Eletrônica de Engenharia Civil 19, no. 1 (2023): 24–35. http://dx.doi.org/10.5216/reec.v19i1.74966.

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RESUMO: Esta pesquisa teve como objetivo avaliar o efeito da adição dos pigmentos inorgânicos nas cores vermelha, amarela e verde em blocos destinados à construção modular. Os blocos foram fabricados com o traço 1:5 (cimento: agregados totais), em massa, utilizando como agregados areia artificial, fíler e micro fíler; todos, subprodutos de britagem. Foram incorporados 0% (traço de referência), 5%, 10% e 15% dos pigmentos em relação à massa do cimento e em substituição parcial ao fíler. Para a confecção dos blocos, utilizou-se uma prensa hidráulica com capacidade de prensagem de 8,0 tf. Foram d

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2

Lin, Lan, and Jianping Xu. "Production of Fungal Pigments: Molecular Processes and Their Applications." Journal of Fungi 9, no. 1 (2022): 44. http://dx.doi.org/10.3390/jof9010044.

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Due to the negative environmental and health effects of synthetic colorants, pigments of natural origins of plants and microbes constitute an abundant source for the food, cosmetic, textile, and pharmaceutical industries. The demands for natural alternatives, which involve natural colorants and natural biological processes for their production, have been growing rapidly in recent decades. Fungi contain some of the most prolific pigment producers, and they excel in bioavailability, yield, cost-effectiveness, and ease of large-scale cell culture as well as downstream processing. In contrast, pig

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3

LYONS, ANTHONY V., and GREGG REED. "Pigmented aqueous barrier coatings." November 2020 19, no. 11 (2020): 551–58. http://dx.doi.org/10.32964/tj19.11.551.

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The desire for more sustainable packaging has led to the development of new packaging materials that are fiber based. Aqueous coatings are a pathway to improve the recyclability of these materials. Pigments used in these coatings can improve the performance of the coating and reduce cost while further improving the recyclability. Mineral pigments are also considered to be compost neutral. In this paper, we provide the reader a better fundamental understanding of the mechanisms by which pigments work in barrier coatings. A pigment’s mineralogy and physical characteristics are important to how i

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4

Leow, M. E. L., R. K. K. Ow, S. Valiyaveettil, M. H. Lee, and R. W. H. Pho. "Colourfast pigments in silicone hand and maxillofacial prostheses." Prosthetics and Orthotics International 26, no. 2 (2002): 124–34. http://dx.doi.org/10.1080/03093640208726635.

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This study addresses the clinical problem of long-term discolouration of silicone hand and maxillofacial prostheses. Seven (7) pigment hues, considered essential for achieving a suitable tissue colour-matched prosthesis, were compared for their colourfast property, across three selected proprietary formulations. In all, a series of 21 pigments, were tested for colourfastness. The pigments, presenting as suspensions (PS), pastes (PP) and dry pigments (PD), were exposed, over nine months, to ultraviolet light, elevated temperatures and varying concentrations of salinity. Colour change of the pig

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5

Ramesh, Chatragadda, V. R. Prasastha, Mekala Venkatachalam, and Laurent Dufossé. "Natural Substrates and Culture Conditions to Produce Pigments from Potential Microbes in Submerged Fermentation." Fermentation 8, no. 9 (2022): 460. http://dx.doi.org/10.3390/fermentation8090460.

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Pigments from bacteria, fungi, yeast, cyanobacteria, and microalgae have been gaining more demand in the food, leather, and textile industries due to their natural origin and effective bioactive functions. Mass production of microbial pigments using inexpensive and ecofriendly agro-industrial residues is gaining more demand in the current research due to their low cost, natural origin, waste utilization, and high pigment stimulating characteristics. A wide range of natural substrates has been employed in submerged fermentation as carbon and nitrogen sources to enhance the pigment production fr

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6

Lebeau, Juliana, Thomas Petit, Mireille Fouillaud, Laurent Dufossé, and Yanis Caro. "Alternative Extraction and Characterization of Nitrogen-Containing Azaphilone Red Pigments and Ergosterol Derivatives from the Marine-Derived Fungal Talaromyces sp. 30570 Strain with Industrial Relevance." Microorganisms 8, no. 12 (2020): 1920. http://dx.doi.org/10.3390/microorganisms8121920.

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Many species of Talaromyces of marine origin could be considered as non-toxigenic fungal cell factory. Some strains could produce water-soluble active biopigments in submerged cultures. These fungal pigments are of interest due to their applications in the design of new pharmaceutical products. In this study, the azaphilone red pigments and ergosterol derivatives produced by a wild type of Talaromyces sp. 30570 (CBS 206.89 B) marine-derived fungal strain with industrial relevance were described. The strain was isolated from the coral reef of the Réunion island. An alternative extraction of the

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7

Widyaningrum, D., N. F. Sadek, D. Cecilia, R. A. Oktafika, and F. Tedjakusuma. "The effect of temperature and encapsulation on the stability of microalgae pigments." IOP Conference Series: Earth and Environmental Science 1352, no. 1 (2024): 012090. http://dx.doi.org/10.1088/1755-1315/1352/1/012090.

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Abstract Microalgae pigments are gaining interest in food industry applications as food additives by providing color and health benefits such as antioxidant properties. The pigment’s sensitivity to heat, pH, oxygen, and other conditions may reduce or lose its function in food products. Due to the sensitivity and instability of microalgae pigment, strategies are needed to protect and retain pigment from reducing their functions. Thirty-two research papers related to the topic published during 2012-2022 were employed in the review. This review focuses on astaxanthin from Haematococcus pluvialis,

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8

Kohl, Miroslav, Fouzy Alafid, Karolína Boštíková, et al. "Preparation and Testing of Anti-Corrosion Properties of New Pigments Containing Structural Units of Melamine and Magnesium Cations (Mg2+)." Coatings 13, no. 11 (2023): 1968. http://dx.doi.org/10.3390/coatings13111968.

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This paper deals with the properties and testing of newly prepared organic pigments based on melamine cyanurate containing magnesium or zinc cations depending on their composition and anticorrosive properties in model coatings. Organic pigments based on melamine cyanurate with Mg2+ in the form of a complex differing in the ratio of melamine and cyanurate units were prepared. Furthermore, a pigment based on melamine citrate with magnesium cation Mg2+, a pigment based on melamine citrate with magnesium cation, and a pigment based on melamine cyanurate with zinc cation were prepared. The properti

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9

Hewagama, H. L., G. M. T. K. Somarathna, L. Herath, and S. E. Peiris. "Microbial Pigment Isolation, Culturing, and Extraction to Use as Textile Dyes." SLIIT Journal of Humanities and Sciences 4, no. 2 (2024): 50–58. http://dx.doi.org/10.4038/sjhs.v4i2.59.

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The textile industry is one of the largest worldwide polluters of clean water due to the heavy use of synthetic dyes. These chemicals negatively affect the environment, especially aquatic life due to their toxic and mutagenic properties. Synthetic dyes cause harm to human health such as skin allergies and respiratory sensitization. Several advantages such as ease of extraction, availability, high yields and no seasonal variation make microbial pigments the most ideal source of natural pigments. This study was done to isolate colour pigment producing bacteria and fungi from soil collected from

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10

P. Nanaware, Jayashri, Shah K.S., and Pathade G.R. "Isolation and Screening of Pigment Producing Bacteria from Soil and Study of Antimicrobial Activity of Pigments." Ecology, Environment and Conservation 30, Suppl.Issue (2024): 16–20. http://dx.doi.org/10.53550/eec.2024.v30i02s.004.

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Pigments are colored compounds that play important roles in various biological systems, such as photosynthesis, vision, and signalling. Pigment-producing bacteria are a diverse group of microorganisms that can produce a wide range of pigments with different colors and properties. The present study is aimed to isolate the pigment-producing bacteria from the soil with the antibacterial activity of pigments. Soil samples were collected from nearby Karad city. All eight different pigmented colonies were isolated that produced the pigments like Yellow, Red, Golden Yellow, and Orange and they were d

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11

Deveikaite, Goda, and Renata Zvirdauskiene. "Isolation and Characterisation of Pigments from Pigment-producing Microorganisms Isolated from Environment and Their Antibacterial Activity." Rural Sustainability Research 49, no. 344 (2023): 1–7. http://dx.doi.org/10.2478/plua-2023-0001.

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Abstract In the food industry, there is always a demand for food products which are colourful, have an attractive appearance, and also have nutritional and health-enhancing properties to attract the attention of consumers. Synthetic pigments are widely used in the global market, however, they can cause many side effects such as hyperallergenicity, carcinogenicity and other toxicological problems. Recent studies have revealed that microorganisms are an abundant source of natural colours that allow the industrial production of safe, environmentally friendly biodegradable pigments. The aim of the

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12

El-Sabbagh, Salwa H., and Nivin M. Ahmed. "Enhancement of styrene-butadiene rubber composites using kaolin covered with metal oxide pigments." Pigment & Resin Technology 44, no. 2 (2015): 57–73. http://dx.doi.org/10.1108/prt-03-2014-0028.

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Purpose – This paper aims to express in detail the rheological, morphological and thermal properties of unpigmented and pigmented styrene-butadiene rubber composites with new prepared inorganic pigment based on kaolin covered with a thin layer of calcium and magnesium oxides or mixed oxide of both together. These new pigments combine the properties of both their constituents (kaolin and metal oxides), which are a new trend in inorganic pigments called core-shell pigments. The pigments used for comparison are kaolin (K), CaO/kaolin (CaO/K), MgO/kaolin (MgO/K) and CaO.MgO/kaolin (CaO.MgO/K). Des

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13

Makino, C. L., and R. L. Dodd. "Multiple visual pigments in a photoreceptor of the salamander retina." Journal of General Physiology 108, no. 1 (1996): 27–34. http://dx.doi.org/10.1085/jgp.108.1.27.

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Although a given retina typically contains several visual pigments, each formed from a retinal chromophore bound to a specific opsin protein, single photoreceptor cells have been thought to express only one type of opsin. This design maximizes a cell's sensitivity to a particular wavelength band and facilitates wavelength discrimination in retinas that process color. We report electrophysiological evidence that the ultraviolet-sensitive cone of salamander violates this rule. This cell contains three different functional opsins. The three opsins could combine with the two different chromophores

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14

Lbova, Liudmila. "Pigment compositions in Siberian early Upper Paleolithic complexes." Journal of the International Union of Prehistoric and Protohistoric Sciences 3, no. 2 (2021): 116–23. http://dx.doi.org/10.62526/lj9ubu.

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Cultural assemblages associated with archaic forms of Homo sapiens in Siberia appeared around 40 000 – 50 000 years BP, revealing the evidence of the modern behavioural complex and use of various pigments. Multi-element composition of pigment materials appearing on some Early Upper Palaeolithic objects, which was obtained using SEM-EDX analysis, showed differences in the use of various natural ingredients in the territories of Southern Siberia (as Kara-Bom, Denisova cave (11), Malaya Syya, Khotyk-3, and Kamenka). Microscopic examination and identification of traces using low- and high-power mi

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15

Hwang, Ga-hyun, Sun Myung Lee, and Hye Young Jeong. "Current Status and Raw Material Characteristics of Painted Pigment in used Traditional Dancheong: Focused on the National-designated Wooden Architectural Heritages in Korea." Journal of Conservation Science 38, no. 6 (2022): 703–19. http://dx.doi.org/10.12654/jcs.2022.38.6.12.

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In this study, the composition of traditional Korean Dancheong pigments existing in national-designated wooden architectural heritages was analyzed, and the current status of pigments according to the raw material characteristics used was statistically examined. As for the red pigment, Seokganju, Yeondan, Jusa had a high share, and natural and artificial inorganic pigments had a high usage rate. As for yellow pigments, organic pigments(estimated Deunghwang), Hhwangto, and gold showed a high share. In the case of organic pigments and gold, Yeonbaek was used as a based pigment to increase color

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16

Stenger, Pierre-Louis, Chin-Long Ky, Céline Reisser, et al. "Molecular Pathways and Pigments Underlying the Colors of the Pearl Oyster Pinctada margaritifera var. cumingii (Linnaeus 1758)." Genes 12, no. 3 (2021): 421. http://dx.doi.org/10.3390/genes12030421.

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The shell color of the Mollusca has attracted naturalists and collectors for hundreds of years, while the molecular pathways regulating pigment production and the pigments themselves remain poorly described. In this study, our aim was to identify the main pigments and their molecular pathways in the pearl oyster Pinctada margaritifera—the species displaying the broadest range of colors. Three inner shell colors were investigated—red, yellow, and green. To maximize phenotypic homogeneity, a controlled population approach combined with common garden conditioning was used. Comparative analysis of

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17

Lind, Olle, Mindaugas Mitkus, Peter Olsson, and Almut Kelber. "Ultraviolet vision in birds: the importance of transparent eye media." Proceedings of the Royal Society B: Biological Sciences 281, no. 1774 (2014): 20132209. http://dx.doi.org/10.1098/rspb.2013.2209.

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Ultraviolet (UV)-sensitive visual pigments are widespread in the animal kingdom but many animals, for example primates, block UV light from reaching their retina by pigmented lenses. Birds have UV-sensitive (UVS) visual pigments with sensitivity maxima around 360–373 nm (UVS) or 402–426 nm (violet-sensitive, VS). We describe how these pigments are matched by the ocular media transmittance in 38 bird species. Birds with UVS pigments have ocular media that transmit more UV light (wavelength of 50% transmittance, λ T0.5 , 323 nm) than birds with VS pigments ( λ T0.5 , 358 nm). Yet, visual models

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18

Пушкарьова, К. К., and Л. В. Терещенко. "ASSESSMENT OF THE INFLUENCE OF INORGANIC PIGMENTS ON THE TECHNOLOGICAL PROPERTIES OF DECORATIVE CEMENTS." Building production, no. 76 (September 18, 2024): 37. http://dx.doi.org/10.36750/2524-2555.76.37-42.

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The article presents the results of research on the influence of inorganic pigments on the technological properties of decorative cements. It has been established that regardless of the color of the pigment, with an increase in its quantity in the system, we get a more saturated and bright color of cement stone, but at the same time there is a negative effect of pigments and technological and physical and mechanical properties of artificial stone. The research was conducted on cement systems based on white Portland cement without additives and on cement systems based on white Portland cement m

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19

Zhang, Yong, Xuening Fei, Lu Yu, Lingyun Cao, and Baolian Zhang. "Preparation and characterisation of silica supported organic hybrid pigments." Pigment & Resin Technology 43, no. 6 (2014): 325–31. http://dx.doi.org/10.1108/prt-10-2013-0087.

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Purpose The purpose of the work reported in this paper is to prepare hybrid pigments fabricated by depositing pigment yellow 12 (PY12) on the surface of silica gel to improve the application performance of the resulting pigments. The particle size distribution, optical properties, thermal stability, water dispersibility and flowability of the pigments with and without silica gel modification were studied. Design/methodology/approach The hybrid pigments were synthesised with different amount of silica gel. The modified pigments were characterised by Fourier transforms infrared spectroscopy, X-r

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20

Ramesh, Vinithkumar, Kirubagaran, Venil, and Dufossé. "Multifaceted Applications of Microbial Pigments: Current Knowledge, Challenges and Future Directions for Public Health Implications." Microorganisms 7, no. 7 (2019): 186. http://dx.doi.org/10.3390/microorganisms7070186.

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Microbial oddities such as versatile pigments are gaining more attention in current research due to their widely perceived applications as natural food colorants, textiles, antimicrobial activities, and cytotoxic activities. This indicates that the future generation will depend on microbial pigments over synthetic colorants for sustainable livelihood. Although several reviews have detailed the comprehensive applications of microbial pigments extensively, knowledge on several aspects of pigmented microbes is apparently missing and not properly reviewed anywhere. Thus, this review has been made

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21

B. N., Narendrababu, and Shishupala S. "Bioprospecting of Talaromyces ruber pigments for antimicrobials." Biomedicine 43, no. 3 (2023): 963–71. http://dx.doi.org/10.51248/.v43i3.2667.

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Introduction and Aim: Metabolic flexibility of fungi is unique among organisms. Fungi can produce various pigments of industrial importance. Potential of Talaromyces ruber for beneficial pigments needs to be explored. Hence, the present study aims at the detection of pigments from T. ruber and determining their antimicrobial properties. Materials and Methods: A soil isolate of T. ruber was tested for pigment production. Cellular and secretory pigments were extracted. They were separated by thin-layer chromatography (TLC) and detected by UV-Visible spectrophotometry. The antibacterial activitie

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22

Narendrababu, B. N., and S. Shishupala. "Biological Activities of Pigments from Aspergillus nidulans." International Journal of Current Microbiology and Applied Sciences 12, no. 6 (2023): 62–75. http://dx.doi.org/10.20546/ijcmas.2023.1206.009.

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The biological activity shown by fungal pigments is of significance for broadening their applications. In the current research, both cellular and secretory pigments produced by Aspergillus nidulans were separated by thin-layer chromatography (TLC) and detected by UV-Visible spectroscopy. The fractions were examined for their biological functions in terms of antimicrobial and antioxidant activities. The findings revealed that the crude cellular pigments had absorption maxima at 458 nm and 521 nm, corresponding to orange and red pigments respectively. The crude secretory pigments showed absorpti

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23

Sarmiento-Tovar, Aixa A., Sara J. Prada-Rubio, Juliana Gonzalez-Ronseria, Ericsson Coy-Barrera, and Luis Diaz. "Exploration of the Bioactivity of Pigmented Extracts from Streptomyces Strains Isolated Along the Banks of the Guaviare and Arauca Rivers (Colombia)." Fermentation 10, no. 10 (2024): 529. http://dx.doi.org/10.3390/fermentation10100529.

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Pigments are chemical compounds that impart color through mechanisms such as absorption, reflection, and refraction. While traditional natural pigments are derived from plant and insect tissues, microorganisms, including bacteria, yeasts, algae, and filamentous fungi, have emerged as promising sources for pigment production. In this study, we focused on pigment production by 20 Streptomyces isolates from our in-house actinobacteria strain collection, sourced from the Guaviare and Arauca Rivers in Colombia. The isolates were identified via 16S rRNA gene sequencing, and the bioactivities—includi

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24

Huang, Luwen, and Liping Zhu. "Research Progress of Natural Edible Blue Pigment." Academic Journal of Science and Technology 2, no. 3 (2022): 20–25. http://dx.doi.org/10.54097/ajst.v2i3.1438.

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Natural edible blue pigment is a scarce pigment among natural pigments, mainly derived from animal and plant tissues, microbial fermentation metabolites. Among the plant natural blue pigments, the ones that account for the widest market of edible natural blue pigments are algal blue pigment and gardenia blue pigment. The sources of microbial natural blue pigment include some fungi and bacteria in addition to microalgae, mainly focusing on the study of Streptomyces, Pseudomonas, Pseudoalteromonas, purple non-sulfur bacteria, Dourollerella, and sprouting short-stalked mold. The natural blue pigm

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25

Zhang, Chan, Qing Sun, Le Yang, et al. "Mutation Breeding of Monascus to Produce a High Yield of Orange Pigment and Low Citrinin Content Using the ARTP Method." Journal of Fungi 10, no. 8 (2024): 553. http://dx.doi.org/10.3390/jof10080553.

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Monascus is a filamentous fungus with a long history of application in China, which can produce a variety of secondary metabolites, including Monascus red pigments, Monascus orange pigments, Monascus yellow pigments, and citrinin. There is widespread attention being paid to natural pigments because of their safety. Among the many natural pigments, orange pigment has a wide range of applications because of its unique color, but current production levels in the orange pigment industry are limited to a certain extent due to the insufficiently wide range of sources and low production. In this stud

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26

Tsiailanis, Antonis D., Chrysanthi Pateraki, Mary Kyriazou, et al. "Chemical Profiling, Bioactivity Evaluation and the Discovery of a Novel Biopigment Produced by Penicillium purpurogenum CBS 113139." Molecules 27, no. 1 (2021): 69. http://dx.doi.org/10.3390/molecules27010069.

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Biobased pigments are environmentally friendly alternatives to synthetic variants with an increased market demand. Production of pigments via fermentation is a promising process, yet optimization of the production yield and rate is crucial. Herein, we evaluated the potential of Penicillium purpurogenum to produce biobased pigments. Optimum sugar concentration was 30 g/L and optimum C:N ratio was 36:1 resulting in the production of 4.1–4.5 AU (namely Pigment Complex A). Supplementation with ammonium nitrate resulted in the production of 4.1–4.9 AU (namely Pigment Complex B). Pigments showed exc

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Yadav, Vivek Kumar. "Comparative Growth Rate of Cyanobacteria from “Usar” Soil (saline/alkaline soils) with Respect to Pigments." Indian Journal of Pure & Applied Biosciences 9, no. 4 (2021): 129–35. http://dx.doi.org/10.18782/2582-2845.8759.

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The pigment content in Blue-green algae is a specific feature of each species. The pigment variation is specific features among microalgae. The paper aim to analyze cyanobacterial extracts of different Usar soil of Azamgarh and Varanasi, Uttar Pradesh. The main object here is the importance of the blue green algae especially because of the pigments present in this class of algae. Pigments from natural sources are gaining more importance mainly due to health and environmental issues. Algae contain a wide range of pigments. Three major classes of pigments are chlorophylls, carotenoids (carotenes

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Leong, Zy Fai, Qi-Hua Chan, and Ku Ishak Ku Marsilla. "Fabrication of thermochromic polybutylene adipate-co-terephthalate (PBAT) and polylactic acid (PLA) blend as temperature sensor." Journal of Physics: Conference Series 2907, no. 1 (2024): 012007. https://doi.org/10.1088/1742-6596/2907/1/012007.

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Abstract Global plastic pollution concerns and materials advancements have facilitated the development of new biodegradable smart materials. This study focused on the fabrication of temperature sensors from polylactic acid (PLA)/polybutylene co-adipate terephthalate (PBAT) blends incorporated with thermochromic black (TCB) pigments. Blends of different PLA/PBAT weight ratios (100/0, 70/30, 50/50, 30/70, 0/100) and pigment concentrations (0, 1, 3 phr) were tested using visual and colorimetric analysis, Fourier-transform infrared (FTIR) spectroscopy, tensile test and scanning electron microscopy

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29

Chudiwal, Dr Anupriya. "Extraction of Bacterial Pigments and Evaluation of its Antioxidant Activity." International Journal for Research in Applied Science and Engineering Technology 12, no. 9 (2024): 1360–65. http://dx.doi.org/10.22214/ijraset.2024.64351.

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Carotenoid are pigment that exist in a wide variety of plant and microorganism they are characterized by red, yellow or orange coloration .These important pigment play significant role in animal and human health .In contrast to plant production, the advantages of microbial fermentation of carotenoids were lower media cost, fast growth rate of microorganism and the ease of culture control . When the microbial cells are used to produce the color the term refers to ‘microbial pigments’. Different types of pigments extracted from different microbes. In this study, soil and water samples were colle

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30

Sarker, Umakanta, Tofazzal Islam, Golam Rabbani, and Shinya Oba. "Antioxidant leaf pigments and variability in vegetable amaranth." Genetika 50, no. 1 (2018): 209–20. http://dx.doi.org/10.2298/gensr1801209s.

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Анотація:

Twenty-three vegetable amaranth genotypes were evaluated for variability, interrelationships among antioxidant leaf pigments and foliage yield. Five genotypes found to be a rich source of antioxidant leaf pigments and might be directly selected as antioxidant leaf pigments enriched high yielding varieties. Two genotypes had high content of antioxidant leaf pigments with low yield might be used as donor parents for antioxidant leaf pigments genes to develop transgressive segregant or pigment enriched transgenic vegetable amaranth varieties. The insignificant negative genotypic correlation was o

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Gorgieva, Selestina, Natalija Virant, and Alenka Ojstršek. "Complementary Assessment of Commercial Photoluminescent Pigments Printed on Cotton Fabric." Polymers 11, no. 7 (2019): 1216. http://dx.doi.org/10.3390/polym11071216.

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The presented study focuses on photoluminescent pigments applied on cotton fabric by a screen-printed procedure using polydimethylsiloxane (PDMS) as a binder. Microscopic data depicts irregular shapes and relatively wide size distribution (3–80 µm) of pigments. Regarding composition, the Energy-Dispersive X-ray (EDX) and Fourier Transform Infrared (FTIR) spectroscopy data complement findings suggesting the presence of Eu-doped strontium aluminate in the yellow-green, calcium aluminate in the violet pigment, and metal oxides in the blue pigment. The optical properties of pigment-enriched PDMS-c

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32

Niederer, Markus, Urs Hauri, Lydia Kroll, and Christopher Hohl. "Identification of organic pigments in tattoo inks and permanent make-ups using MALDI-TOF mass spectrometry." F1000Research 6 (November 21, 2017): 2034. http://dx.doi.org/10.12688/f1000research.13035.1.

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Анотація:

Nowadays, about 12% of the European and 20% of the US population are tattooed. Rising concerns regarding consumer safety, led to legal restrictions on tattoo inks and permanent make-up (PMU) inks. Restrictions also include bans on certain hazardous colourants. Both ink types use organic pigments for colour-giving, plus inorganic pigments for white and black and colour tones. Pigments are only sparingly soluble in common solvents and occur as suspended particles in the ink matrix. Their detection and identification therefore pose a major challenge for laboratories involved in monitoring the leg

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Niederer, Markus, Urs Hauri, Lydia Kroll, and Christopher Hohl. "Identification of organic pigments in tattoo inks and permanent make-up using laser desorption ionisation mass spectrometry." F1000Research 6 (January 8, 2018): 2034. http://dx.doi.org/10.12688/f1000research.13035.2.

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Анотація:

Nowadays, about 12% of the European and 20% of the US population are tattooed. Rising concerns regarding consumer safety, led to legal restrictions on tattoo and permanent make-up (PMU) inks. Restrictions also include bans on certain colourants. Both ink types use organic pigments for colour-giving, plus inorganic pigments for white and black and colour tones. Pigments are only sparingly soluble in common solvents and occur as suspended particles in the ink matrix. Their detection and identification therefore pose a major challenge for laboratories involved in monitoring the legal compliance o

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Chavan, Akshay, Jaya Pawar, Umesh Kakde, et al. "Pigments from Microorganisms: A Sustainable Alternative for Synthetic Food Coloring." Fermentation 11, no. 7 (2025): 395. https://doi.org/10.3390/fermentation11070395.

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Анотація:

Microbial pigments are gaining acceptance as a green, sustainable substitute for synthetic food pigments due to growing health issues and their adverse health impacts. This review provides an overview of the potential of microbial pigments as natural food colorants and the advantages of microbial pigments over synthetic pigments. Microbial pigments are a natural source of color with medicinal properties like anticancer, antimicrobial, and antioxidant activity. Important pigments covered are astaxanthin, phycocyanin, prodigiosin, riboflavin, β-carotene, violacein, melanin, and lycopene, and the

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35

Hashimoto, Kimiko, Yoko Saikawa, and Masaya Nakata. "Studies on the red sweat of the Hippopotamus amphibius." Pure and Applied Chemistry 79, no. 4 (2007): 507–17. http://dx.doi.org/10.1351/pac200779040507.

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The secretion from the hippopotamus' skin changes its color from colorless to red, and then brown by polymerization of its pigments. The responsible pigments for the coloring reaction were isolated and denoted as hipposudoric acid (the red pigment) and norhipposudoric acid (the orange pigment). The syntheses of these pigments and the related derivatives were performed, and the latter were of use to elucidate the structures of these pigments including their tautomeric structures in aprotic and protic solvents. These pigments were estimated to be medicines for the hippopotamus, having the effect

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Lee, Sun Myung, Young Seok Kang, Ju Hyun Park, Myoung Nam Kim, Jin Young Hong, and Seong Woo Mun. "Comparison of the Characteristics of Baekak(chalk) and Hobun(shell) Pigment for Dancheong based on Natural Raw Materials." Journal of Conservation Science 40, no. 3 (2024): 345–57. http://dx.doi.org/10.12654/jcs.2024.40.3.14.

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Calcium carbonate white pigments were manufactured by classifying them into Baekak(chalk) and Hobun(Shell) according to the type of natural raw material, and their material characteristics were analyzed. Their performances were compared by evaluating their weather resistance, antifungal activity, and flame retardancy. The main components of Baekak pigments are calcite and dolomite, and those of Hobun pigments a re calcite and a ragonite. Depending on the raw material, the specific factors identified are Mg from the mineral composition of Baekak pigments, and P and S from the protein compositio

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Partridge, J. C., S. N. Archer, and J. Vanoostrum. "Single and multiple visual pigments in deep-sea fishes." Journal of the Marine Biological Association of the United Kingdom 72, no. 1 (1992): 113–30. http://dx.doi.org/10.1017/s0025315400048827.

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Анотація:

The visual pigments in the retinal rods of 17 species of deep-sea fish were examined by microspectrophotometry or visual pigment extract spectrophotometry. In 15 species single visual pigments were found with peak sensitivities between 470 and 490 nm, typical of deep-sea fishes. However, in one species, Stylephorons cordatus, two visual pigments were found with λ values at 470 and 481 nm. In another species, Scopelarchus analis, three visual pigments were found with mean λ values of 444, 479 and 505 nm. The short-wave pigment of this species was found both in main and accessory retinae. It was

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MATHER, ROBERT R. "The Effect of Crystal Properties on the Manufacture and Application Performance of Copper Phthalocyanine Pigments." Journal of Porphyrins and Phthalocyanines 03, no. 07 (1999): 643–46. http://dx.doi.org/10.1002/(sici)1099-1409(199908/10)3:6/7<643::aid-jpp187>3.0.co;2-v.

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Анотація:

Copper phthalocyanines are commercially important organic pigments for blue shades of colour. They are dispersed by mechanical means as tiny molecular crystals (of dimensions 0.02—0.5 μm) into a wide range of commercial media to form products such as printing inks, paints and coloured plastics. Many important technological properties of copper phthalocyanine pigments, including colour strength and dispersion performance, depend on the physical properties of their crystals, notably crystal lattice type, crystal size and crystal shape. The roles which these crystal properties play in determining

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Koli, Sunil H., Rahul K. Suryawanshi, Bhavana V. Mohite, and Satish V. Patil. "Prospective of Monascus Pigments as an Additive to Commercial Sunscreens." Natural Product Communications 14, no. 12 (2019): 1934578X1989409. http://dx.doi.org/10.1177/1934578x19894095.

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Red and yellow pigments from Monascus purpureus (NMCC-PF01) were evaluated to enhance sun protection factor (SPF) of commercial sunscreens and Aloe vera extract. The extracted Monascus pigments contain rubropunctamine (red pigment) and the mixture of monascin and ankaflavin (yellow pigment) as major components. Antioxidant activity and in-vitro safety of the pigments were assessed by ferric reduction potential and DPPH radical scavenging assays, human keratinocytes (HaCaT), and erythrocytes (RBCs) cytotoxicity assay, respectively. In results, SPF of commercial sunscreens showed an increase of

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40

Almurshidi, Badria H., R. C. Van Court, Sarath M. Vega Gutierrez, Stacey Harper, Bryan Harper, and Seri C. Robinson. "Preliminary Examination of the Toxicity of Spalting Fungal Pigments: A Comparison between Extraction Methods." Journal of Fungi 7, no. 2 (2021): 155. http://dx.doi.org/10.3390/jof7020155.

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Анотація:

Spalting fungal pigments have shown potential in technologies ranging from green energy generation to natural colorants. However, their unknown toxicity has been a barrier to industrial adoption. In order to gain an understanding of the safety of the pigments, zebrafish embryos were exposed to multiple forms of liquid media and solvent-extracted pigments with concentrations of purified pigment ranging from 0 to 50 mM from Chlorociboria aeruginosa, Chlorociboria aeruginascens, and Scytalidium cuboideum. Purified xylindein from Chlorociboria sp. did not show toxicity at any tested concentration,

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Ati, Neltji Herlina, Puji Rahayu, Soenarto Notosoedarmo, and Leenawaty Limantara. "THE COMPOSITION AND THE CONTENT OF PIGMENTS FROM SOME DYEING PLANT FOR IKAT WEAVING IN TIMORRESE REGENCY, EAST NUSA TENGGARA." Indonesian Journal of Chemistry 6, no. 3 (2010): 325–31. http://dx.doi.org/10.22146/ijc.21741.

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Анотація:

Ikat weaving is one of traditional-home industry using plant pigments as a dye which have not been known for their pigments composition. So, the research was carried out to know the composition and the content of pigments in young leaf teak, noni root, turmeric tuber, casuarine bark and betel-nut root. The result showed that pigment composition in young leaf teak consisted of β-carotene, pheophytine, phelargonydine 3-glucosyde, phelargonydine 3,7-diglucosyde, chlorophyllide and two other pigments that have not been identified. Most of the pigments composition in betel-nut root have not been id

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Pugacheva, Tatyana A., Georgiy V. Malkov, Alexander A. Ilyin, Eugene A. Indeikin, and Vladimir G. Kurbatov. "Core/Shell Pigments with Polyaniline Shell: Optical and Physical–Technical Properties." Polymers 14, no. 10 (2022): 2005. http://dx.doi.org/10.3390/polym14102005.

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Core/shell pigments allow for the combination of the active anti-corrosion effect of the shell and the barrier effect of the core. This makes it possible to obtain anti-corrosion pigments, with a high—protective effect and low toxicity. Thus, the need for a comprehensive study of the properties of these pigments grows more urgent, before their application to paints and varnishes. The hiding power of core/shell pigments comes close to the one of pure polyaniline (PANi), when the PANi content in the pigment reaches 50 wt.%, with sulfuric and phosphoric acids used as dopants. This paper, also, sh

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Afifah Mursyida Zaujan, Nur, Mohamad Zohdi Othman, Fatin Najihah Mohd Lutfi, Kamarul Rahim Kamarudin, Hanina Mohd Noor, and Maryam Mohamed Rehan. "IDENTIFICATION AND CHARACTERIZATION OF PIGMENTED BACTERIA ISOLATED FROM MALAYSIAN SEAWATER." International Journal of Students' Research in Technology & Management 7, no. 4 (2019): 01–08. http://dx.doi.org/10.18510/ijsrtm.2019.741.

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Purpose of study: Bacteria can naturally produce pigments that can be useful for various applications as they possess antimicrobial metabolites among other numerous benefits towards the human health. This study was carried out to identify the species of marine bacterial isolates PMA, PM3C1 and PM5C1 exhibiting yellow, orange and green colors respectively. Methodology: The current study is using Polymerase Chain Reaction (PCR) amplification and sequence analysis of their 16S rRNA gene. The stability of pigments extracted from the bacterial samples was also analyzed against different tempe

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Hoque, Md Saiful, Mehnab Ali, Xiaoruo Sun, et al. "Development of Visibly Opaque Polyolefin Sheets While Preserving Infrared-Light Transparency." Micromachines 16, no. 2 (2025): 178. https://doi.org/10.3390/mi16020178.

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This study focused on developing pigmented linear low-density polyethylene (LLDPE) sheets while preserving their mechanical properties and infrared (IR) transparency. Six pigments—ZnO, ZnS, TiO2, FeO yellow, FeO light brown, and FeO dark brown—were each mixed with polyethylene (PE) wax in a 1:1 ratio and blended with LLDPE at concentrations of 1, 3, and 5 wt%. Tensile strength tests showed minimal changes at lower pigment concentrations, with values near that of pure LLDPE (14 MPa), and slight reductions at 5 wt%. IR transparency tests, conducted using both direct and reflected heat sources, s

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Marques, Rayana Pires, Clarissa Soares Freire, Hugo Henrique Costa do Nascimento, and Rejane Jurema Mansur Custósio Nogueira. "Relações Hídricas e Produção de Pigmentos Fostossinteticos em Mudas de Eugenia Uniflora l. Sob Condições de Salinidade (Water Relations and Production of Pigments in Seedlings Photosynthetic Eugenia Uniflora l. Under Salinity Conditions)." Revista Brasileira de Geografia Física 4, no. 3 (2011): 497. http://dx.doi.org/10.26848/rbgf.v4i3.232729.

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Esta pesquisa objetivou avaliar os efeitos da salinidade nas relacoes hidricas e teor de pigmentos fotossintetizantes em mudas de pitangueira. Para tanto, foi desenvolvido um experimento em casa de vegetacao do Laboratorio de Fisiologia Vegetal, pertencente ao Departamento de Biologia da UFRPE, no periodo de dezembro de 2010 a abril de 2011. O delineamento experimental utilizado foi o inteiramente casualizado com quatro tratamentos salinos: 0 (controle), 30, 60 e 90 mM de NaCl, e com cinco repeticoes por tratamento. Aos 35 e 95 DAD (dias apos diferenciacao) decorreram as analises fisiologicas.

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van der Kooi, Casper J., J. Theo M. Elzenga, Marten Staal, and Doekele G. Stavenga. "How to colour a flower: on the optical principles of flower coloration." Proceedings of the Royal Society B: Biological Sciences 283, no. 1830 (2016): 20160429. http://dx.doi.org/10.1098/rspb.2016.0429.

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The coloration of flowers is due to the wavelength-selective absorption by pigments of light backscattered by structures inside the petals. We investigated the optical properties of flowers using (micro)spectrophotometry and anatomical methods. To assess the contribution of different structures to the overall visual signal of flowers, we used an optical model, where a petal is considered as a stack of differently pigmented and structured layers and we interpreted the visual signals of the model petals with insect vision models. We show that the reflectance depends, in addition to the pigmentat

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Agarwal, Himani, Sneh Bajpai, Arti Mishra, et al. "Bacterial Pigments and Their Multifaceted Roles in Contemporary Biotechnology and Pharmacological Applications." Microorganisms 11, no. 3 (2023): 614. http://dx.doi.org/10.3390/microorganisms11030614.

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Synthetic dyes and colourants have been the mainstay of the pigment industry for decades. Researchers are eager to find a more environment friendly and non-toxic substitute because these synthetic dyes have a negative impact on the environment and people’s health. Microbial pigments might be an alternative to synthetic pigments. Microbial pigments are categorized as secondary metabolites and are mainly produced due to impaired metabolism under stressful conditions. These pigments have vibrant shades and possess nutritional and therapeutic properties compared to synthetic pigment. Microbial pig

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Valencia, Ricardo, Ivone Giffard-Mena, Ricardo Cruz-López, Ernesto García-Mendoza, and José Luis Stephano-Hornedo. "Growth Profiles, Nutrient composition and Pigments Analysis of Dunaliella salina strain San Quintin." CICIMAR Oceánides 33, no. 2 (2018): 1. http://dx.doi.org/10.37543/oceanides.v33i2.212.

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Some microalgae are recognized for producing pigments and other metabolites with biotechnological importance, particularly, <i>Dunaliella salina</i> is a remarkable one. These kind of compounds are used as food and have a great industrial potential. The pigment industry comprises a millionaire market value, being β-carotene one of the most profitable one. In this study we describe the morphology, molecular identification, growth dynamics, proximal composition, nutrients and pigment content of a recently isolated <i>Dunaliella salina</i> strain (SQ) under different salin

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N S, Delna, Renu Mishra, and Anil Praksh. "A Brief Review on the Emerging Role of Bacterial Pigments: From Industrial Uses to Novel Therapeutic Applications." Asian Journal of Biotechnology and Bioresource Technology 10, no. 4 (2024): 12–17. http://dx.doi.org/10.9734/ajb2t/2024/v10i4214.

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Pigments produced by microorganisms are in high demand due to their safe, non-toxic, and biodegradable characteristics in both industrial and pharmaceutical fields. Using bacteria for pigment production offers several advantages, such as a short life cycle and ease of genetic modification. Numerous studies have highlighted that soil bacteria significantly contribute to the production of coloured pigments as secondary metabolites. Bacterial pigments are well-known for their antimicrobial, antioxidant, and anticancer properties, offering new therapeutic opportunities for the development of novel

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Hájková, T., and A. Kalendová. "The anticorrosion properties of pigments based on molybdates and tungstates surface-modified with conducting polymers." Koroze a ochrana materialu 61, no. 1 (2017): 7–18. http://dx.doi.org/10.1515/kom-2017-0001.

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Abstract The objective of this work was to examine the properties of molybdate or tungstate based pigments whose surface has been coated with a conductive polymer, viz. either polyaniline phosphate (PANI) or polypyrrole phosphate (PPY), if used as pigments in organic coating materials. The anticorrosion pigments were prepared by high-temperature solid-state synthesis from the respective oxides, carbonates. The composite pigments (pigment/conductive polymer) were dispersed in a solvent-type epoxy-ester resin binder to obtain a series of paints whose anticorrosion properties were assessed by mea

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