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Journal articles on the topic 'Pigmenten'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Kappelmeier, C. P. A. "Die Analyse von Chromgrün und ähnlich zusammengesetzten Pigmenten." Recueil des Travaux Chimiques des Pays-Bas 50, no. 8 (2010): 711–18. http://dx.doi.org/10.1002/recl.19310500806.

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Ivanauskas, Ernestas, and Donatas Grigonis. "Pigmentų įtakos savaime sutankėjančio betono savybėms tyrimai." Mokslas - Lietuvos ateitis 1, no. 5 (2011): 10–14. http://dx.doi.org/10.3846/mla.2009.5.02.

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Darbe aprašomas geležies oksido pigmento įtakos savaime sutankėjančio betono savybėms tyrimai. Tyrimo metu pigmento į betono mišinius buvo pridedama nuo 3 iki 6 % cemento masės. Taip pat atlikti kelių (chromo oksido, geležies oksido hidroksido ir geležies oksido) pigmentų įtakos normalaus tirštumo cementinei tešlai gauti tyrimai. Straipsnyje parodome, kad geležies oksido pigmentas sumažina vandens poreikio normalaus tirštumo cemento tešlai gauti. Pridedamas pigmentas mažina betono stiprį gniuždant iki 20 %. Bandiniai buvo testuojami po 1 paros ir 28 parų kietėjimo, išlaikant juos vandenyje 20±

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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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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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Hedden, Kurt, and Dieter E. Vesper. "Verhalten von Pigmenten und Füllstoffen bei der thermischen Behandlung von Lackschlämmen." Chemie Ingenieur Technik 61, no. 8 (1989): 655. http://dx.doi.org/10.1002/cite.330610827.

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Feneis, Charlotte, and Sven Steinbach. "Untersuchungen zur Lichtschädigung an mineralischen Pigmenten - Farben im Laufe der Zeit." Bauphysik 40, no. 4 (2018): 214–19. http://dx.doi.org/10.1002/bapi.201810022.

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7

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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8

Goodwin, P. H., and C. R. Sopher. "Brown pigmentation of Xanthomonas campestris pv. phaseoli associated with homogentisic acid." Canadian Journal of Microbiology 40, no. 1 (1994): 28–34. http://dx.doi.org/10.1139/m94-005.

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The diffusible brown pigment produced by some strains of Xanthomonas campestris pv. phaseoli was found to be due to the secretion and subsequent oxidation of homogentisic acid (2, 5-dihydroxyphenylacetic acid) rather than tyrosinase activity as previously reported. Homogentisic acid is an intermediate in tyrosine catabolism for a number of bacteria. Brown-pigmented strains appeared to be disrupted in tyrosine catabolism and could not use tyrosine as a nutrient. Nonpigmented strains, however, could utilize tyrosine as a nutrient, and although they secreted homogentisic acid, the levels were app

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9

Mayser, P., G. Wille, Anne Inkampe, Wiebke Thoma, N. Arnold, and T. Monsees. "Synthese von Fluorochromen und Pigmenten durchMalassezia furfurunter Verwendung von Trypthophan als alleiniger Stickstoffquelle." Mycoses 41 (October 1998): 74–77. http://dx.doi.org/10.1111/j.1439-0507.1998.tb00607.x.

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10

Busolini, Fabricio Ivan, Graciela Beatriz Rodríguez, Verónica Palmira Filippa, and Fabian Heber Mohamed. "Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study." International Journal of Endocrinology 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/7492960.

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The presence of pigment has been demonstrated in different nervous structures such as those of retina, substantia nigra, and locus coeruleus. These pigments have also been described in the pineal gland of different mammal species. Histochemical and ultrastructural studies of the pineal gland of female viscacha (Lagostomus maximus maximus) were performed to analyze the presence of pigmented cells under natural conditions and to evaluate a probable relation between pigment content and glandular activity during pregnancy. The following techniques were applied: hematoxylin-eosin, phosphotungstic a

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Patterson, G. I., L. J. Harris, V. Walbot, and V. L. Chandler. "Genetic analysis of B-Peru, a regulatory gene in maize." Genetics 127, no. 1 (1991): 205–20. http://dx.doi.org/10.1093/genetics/127.1.205.

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Abstract The B locus in maize is required for the accumulation of anthocyanin pigments. Numerous B alleles have been described: each determines a particular pattern of pigment synthesis with respect to the tissues that are pigmented and the time during development that pigment synthesis begins. We report here a genetic analysis of one B allele, B-Peru, which regulates synthesis of pigments in both kernel and plant tissues. We used stocks with active Mutator transposable elements to produce eight mutations in B-Peru. All eight alter pigment synthesis in all the kernel and plant tissues pigmente

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Irsch, Wilhelm. "Der Schnabel des Stockerpels: Von Farben und ihren Botschaften, leuchtenden Pigmenten und starker Abwehr." Biologie in unserer Zeit 37, no. 5 (2007): 286–87. http://dx.doi.org/10.1002/biuz.200790077.

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Maraccini, Peter A., Donna M. Ferguson, and Alexandria B. Boehm. "Diurnal Variation in Enterococcus Species Composition in Polluted Ocean Water and a Potential Role for the Enterococcal Carotenoid in Protection against Photoinactivation." Applied and Environmental Microbiology 78, no. 2 (2011): 305–10. http://dx.doi.org/10.1128/aem.06821-11.

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ABSTRACTEnterococcusspecies composition was determined each hour for 72 h at a polluted marine beach in Avalon, Santa Catalina Island, CA. Species composition during the day was significantly different from that at night, based on an analysis of similarity.Enterococcus faeciumandE. faecaliswere more prevalent at night than during the day, whileE. hiraeand otherEnterococcusspecies were more prevalent during the day than the night.Enterococcusspp. containing a yellow pigment were more common during the day than the night, suggesting that the pigmented phenotype may offer a competitive advantage

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Palomino Agurto, Mardonio E., Sarath M. Vega Gutierrez, R. C. Van Court, Hsiou-Lien Chen, and Seri C. Robinson. "Oil-Based Fungal Pigment from Scytalidium cuboideum as a Textile Dye." Journal of Fungi 6, no. 2 (2020): 53. http://dx.doi.org/10.3390/jof6020053.

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Identification of effective natural dyes with the potential for low environmental impact has been a recent focus of the textile industry. Pigments derived from spalting fungi have previously shown promise as textile dyes; however, their use has required numerous organic solvents with human health implications. This research explored the possibility of using linseed oil as a carrier for the pigment from Scytalidium cuboideum as a textile dye. Colored linseed oil effectively dyed a range of fabrics, with natural fibers showing better coloration. Scanning electron microscopy (SEM) revealed a pigm

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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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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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Tearle, Rick. "Tissue specific effects of ommochrome pathway mutations in Drosophila melanogaster." Genetical Research 57, no. 3 (1991): 257–66. http://dx.doi.org/10.1017/s0016672300029402.

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SummaryThe tissue-specific effects of 17 mutations affecting the synthesis of brown eye pigment (xanthommatin) have been investigated by combining them with chocolate and red cells, two mutations causing ectopic pigmentation of the Malpighian tubules and larval fat body (which normally only synthesize pigment precursors). The majority of mutations block the pigmentation of four organs: the normally pigmented eyes and ocelli, and ectopically pigmented tubules and fat body. They represent genes that would appear to be required for the normal operation of the pathway per se and are likely to enco

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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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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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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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Prelovšek, Petra-Maja, Lilijana Bizjak Mali, and Boris Bulog. "Hepatic pigment cells of Proteidae (Amphibia, Urodela): A comparative histochemical and ultrastructural study." Animal Biology 58, no. 2 (2008): 245–56. http://dx.doi.org/10.1163/157075608x328080.

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AbstractAmphibian liver pigment cells, also known as Kupffer cells, contain various amounts of melanin, haemosiderin and lipofuscin. We used different histochemical and ultrastructural methods to analyse and compare the level of hepatic pigmentation and the structure of hepatic pigment cells in the livers of three representatives of the family Proteidae; two subspecies of the hypogean Proteus anguinus (depigmented Proteus a. anguinus and pigmented Proteus a. parkelj) and the epygean Necturus maculosus. Our analysis revealed differences at histological and ultrastructural level. While the perce

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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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Gerber, Peter Arne. "Klassifizierung von Komplikationen bei Tätowierungen: Potenzial für neuen Standard." Kompass Dermatologie 5, no. 3 (2017): 138–40. http://dx.doi.org/10.1159/000471826.

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Hintergrund/Ziele: Tätowierungen sind weltweit in Mode. Das klinische Wissen über Komplikationen beruht auf Fallberichten, die im Laufe eines Jahrhunderts gesammelt wurden. Untersuchungen an größeren Kohorten zu Komplikationen und aktuellen Trends liegen nicht vor. Methoden: Wir analysierten retrospektiv eine Kohorte konsekutiver Patienten mit Tätowierungskomplikationen, die zwischen 2008 und 2015 in der «Tattoo-Klinik» des Universitätskrankenhauses Bispebjerg in Kopenhagen, Dänemark anhand einer Anamnese und der systematischen klinischen Untersuchung diagnostiziert wurden. Ergebnisse: Insgesa

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Uysal, Mucteba. "The Use of Waste Maroon Marble Powder and Iron Oxide Pigment in the Production of Coloured Self-Compacting Concrete." Advances in Civil Engineering 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/8093576.

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This work covers some workability, mechanical, and durability properties of coloured self-compacting concrete (SCC) containing maroon marble powder and iron oxide pigment. Pigments with varying amounts were used to produce coloured SCC. For this purpose, ten different series were prepared of which two of the series were pigment free that one of them was the colour of white SCC including limestone powder and the other one was the colour of maroon SCC including maroon marble powder. The other series were containing pigments with varying amounts. The water to binder ratio remained constant for al

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ETAYO, JAVIER, ADAM FLAKUS, and MARTIN KUKWA. "Three new lichenicolous species of the genus Plectocarpon (Ascomycota: Lecanographaceae) discovered in the Bolivian Andes." Phytotaxa 357, no. 4 (2018): 275. http://dx.doi.org/10.11646/phytotaxa.357.4.3.

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In this paper three new species of Plectocarpon, P. dimorphosporum (on Ricasolia patinifera), P. parmotrematis (on Parmotrema reticulatum) and P. ramalinae (on Ramalina celastri), are described from tropical montane forests in the Bolivian Andes. Plectocarpon dimorphosporum is characterized by strongly convex ascomata covered by the host cortex when young, presence of Atra-brown pigment and 1–3-septate ascospores developing a brown-pigmented granular perispore, P. parmotrematis by rounded and slightly superficial ascomata, presence of pigments reacting K+ aeruginose to turquoise and colorless

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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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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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Aguilar-Machado, Diederich, Lourdes Morales-Oyervides, Juan C. Contreras-Esquivel, et al. "Effect of ohmic heating processing conditions on color stability of fungal pigments." Food Science and Technology International 23, no. 4 (2017): 338–48. http://dx.doi.org/10.1177/1082013216689514.

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The aim of this work was to analyze the effect of ohmic heating processing conditions on the color stability of a red pigment extract produced by Penicillium purpurogenum GH2 suspended in a buffer solution (pH 6) and in a beverage model system (pH 4). Color stability of pigmented extract was evaluated in the range of 60–90 ℃. The degradation pattern of pigments was well described by the first-order (fractional conversion) and Bigelow model. Degradation rate constants ranged between 0.009 and 0.088 min−1 in systems evaluated. Significant differences in the rate constant values of the ohmic heat

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Tan, Cheng, Zhong-Sheng Min, Yanning Xue, and Wen-Yuan Zhu. "Spectrum of Dermoscopic Patterns in Lichen Planus: A Case Series from China." Journal of Cutaneous Medicine and Surgery 18, no. 1 (2014): 28–32. http://dx.doi.org/10.2310/7750.2013.13049.

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Background: Dermoscopy has been shown to be a promising method to facilitate the diagnosis of lichen planus (LP) outside of China. Objective: To investigate the spectrum of dermoscopic patterns in Chinese LP patients. Methods: The clinical data and dermoscopic patterns of nine LP cases with a total of 43 lesions were evaluated. Results: To the naked eye, 20.97% of the lesions exhibited graying Wickham striae (WS); however, 37.5% presented with white streaks of annular, reticular, or leaf venation patterns under dermoscopy. Blue-white veils were occasionally observed in the center. Pigment patt

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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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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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Caridi, Andrea. "Petri dish method to select yeasts able to produce more pigmented table olives." Acta Scientiarum. Technology 42 (May 28, 2020): e48132. http://dx.doi.org/10.4025/actascitechnol.v42i1.48132.

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The study of pigment adsorption of yeasts used for table olive fermentation may allow the protection of olive colour, by excluding those strains adsorbing phenolic compounds responsible for the colour. Fifty-one table olive yeasts were grown on Petri dishes using two olive-based screening media - ‘olive pulp agar’ and ‘olive seed agar’; the red, green, and blue colour components of the yeast’s biomass were measured. Wide and significant differences among the yeasts were observed. Based on the statistical analysis, ten yeasts were selected, excluding all the strains exhibiting a too high pigmen

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Sheves, Morechai, and Noga Friedman. "Einfluß von externen negativen Ladungen auf die Absorptionsmaxima von symmetrische Cyaninen; Untersuchungen an Modellverbindungen und künstlichen Bacteriorhodopsin-Pigmenten." Angewandte Chemie 98, no. 3 (1986): 260–61. http://dx.doi.org/10.1002/ange.19860980312.

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Deravi, Leila F., Andrew P. Magyar, Sean P. Sheehy, et al. "The structure–function relationships of a natural nanoscale photonic device in cuttlefish chromatophores." Journal of The Royal Society Interface 11, no. 93 (2014): 20130942. http://dx.doi.org/10.1098/rsif.2013.0942.

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Cuttlefish, Sepia officinalis , possess neurally controlled, pigmented chromatophore organs that allow rapid changes in skin patterning and coloration in response to visual cues. This process of adaptive coloration is enabled by the 500% change in chromatophore surface area during actuation. We report two adaptations that help to explain how colour intensity is maintained in a fully expanded chromatophore when the pigment granules are distributed maximally: (i) pigment layers as thin as three granules that maintain optical effectiveness and (ii) the presence of high-refractive-index proteins—r

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Small, Irene. "Pigment pur e o Corpo da côr: prática pós-pictórica e transmodernidade." ARS (São Paulo) 15, no. 30 (2017): 255. http://dx.doi.org/10.11606/issn.2178-0447.ars.2017.138499.

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Este artigo analisa uma incidência quase contemporânea da prática pós-pintura – o uso de pigmento bruto –, utilizada pelo artista neo-avant-garde francês Yves Klen e pelo artista brasileiro Hélio Oiticica. O uso de pigmento bruto por ambos artistas foi condicionado por uma relação autoconsciente com a história da arte modernista e do monocromo, como limite e origem da pintura. Apesar da confluência de tais orientações, os Pigments purs (pigmentos puros) de Klein e o Corpo da côr de Oiticica resultaram em orientações radicalmente divergentes, direcionadas à commodity produzida industrialmente e

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Youngchim, Sirida, Soraya Pornsuwan, Joshua D. Nosanchuk, Wiyada Dankai, and Nongnuch Vanittanakom. "Melanogenesis in dermatophyte species in vitro and during infection." Microbiology 157, no. 8 (2011): 2348–56. http://dx.doi.org/10.1099/mic.0.047928-0.

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Dermatophytes are keratinophilic fungi that are the most common cause of fungal skin infections worldwide. Melanin has been isolated from several important human fungal pathogens, and the polymeric pigment is now recognized as an important virulence determinant. This study investigated whether dermatophytes, including Trichophyton rubrum, Trichophyton mentagrophytes, Epidermophyton floccosum and Microsporum gypseum, produce melanin or melanin-like compounds in vitro and during infection. Digestion of the pigmented microconidia and macroconidia of dermatophytes with proteolytic enzymes, denatur

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McGraw, Kevin J., Kazumasa Wakamatsu, Shosuke Ito, et al. "You Can't Judge a Pigment by its Color: Carotenoid and Melanin Content of Yellow and Brown Feathers in Swallows, Bluebirds, Penguins, and Domestic Chickens." Condor 106, no. 2 (2004): 390–95. http://dx.doi.org/10.1093/condor/106.2.390.

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Abstract The two main pigment types in bird feathers are the red, orange, and yellow carotenoids and the black, gray, and brown melanins. Reports conflict, however, regarding the potential for melanins to produce yellow colors or for carotenoids to produce brown plumages. We used high-performance liquid chromatography to analyze carotenoids and melanins present in the yellow and brown feathers of five avian species: Eastern Bluebirds (Sialia sialis), Barn Swallows (Hirundo rustica), King Penguins (Aptenodytes patagonicus), Macaroni Penguins (Eudyptes chrysolophus), and neonatal chickens (Gallu

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Rahmawati, Dewi Elok, Lilik Miftahul Khoiroh, Rachmawati Ningsih, Febi Yusniyanti, Wariatus Solawati та Puspa Sari. "Synthesis of Hematite Pigment (Α-Fe2O3) from Iron Lathe Waste using Precipitation-Sonication Method as Anti-Swelling on Wood". International Journal of Mechanical Engineering Technologies and Applications 1, № 2 (2020): 69. http://dx.doi.org/10.21776/mechta.2020.001.02.5.

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<p class="02abstracttext"><span lang="PT-BR">Iron lathe waste powder has the potential as a raw material in the synthesis of hematite pigments. Hematite pigments have many advantages, one of which is anti-swelling properties that can maintain the dimensions of wood. Hematite pigment synthesis was carried out using the precipitation-sonication method. The precipitation stage uses an ammonium hydroxide solution as a precipitating agent. Stages of sonication using the PEG-6000 template were performed at different times were 30, 45, and 90 minutes then calcined at 750 ° C for 3 hours.

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Setiyono, Edi, Marcelinus Alfasisurya Setya Adhiwibawa, Matheus Randy Prabowo, and Tatas H. P. Brotosudarmo. "Characterization of Tambjamines Pigment from Marine Bacterium Pseudoalteromonas sp. PM2 Indigenous from Alor Island, Indonesia." Indonesian Journal of Natural Pigments 3, no. 1 (2021): 16–23. http://dx.doi.org/10.33479/ijnp.2021.03.1.16-23.

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Pigments from marine bacteria have attracted the attention for scientists because of their extensive applications and currently exploration of new pigment sources from marine bacteria is still ongoing. Recently, we have successfully isolated six new yellow-pigmented marine bacteria, strain PS2, PM2, SB11, SB13, SB21, and SB23, isolated from seawater from different sampling sites on Alor Island, Indonesia. The UV−Vis and FTIR spectra of the crude pigment extracts of the six strains showed the characteristics of tambjamines, a group of yellow pigments commonly found in nudibranchs and bryozoans.

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Nawaz, Ali, Rida Chaudhary, Zinnia Shah, et al. "An Overview on Industrial and Medical Applications of Bio-Pigments Synthesized by Marine Bacteria." Microorganisms 9, no. 1 (2020): 11. http://dx.doi.org/10.3390/microorganisms9010011.

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Marine bacterial species contribute to a significant part of the oceanic population, which substantially produces biologically effectual moieties having various medical and industrial applications. The use of marine-derived bacterial pigments displays a snowballing effect in recent times, being natural, environmentally safe, and health beneficial compounds. Although isolating marine bacteria is a strenuous task, these are still a compelling subject for researchers, due to their promising avenues for numerous applications. Marine-derived bacterial pigments serve as valuable products in the food

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Guo-Ping, Zhao, Li Ying-Qiu, Yang Jie, and Cui Kai-Yu. "Antibacterial characteristics of orange pigment extracted from Monascus pigments against Escherichia coli." Czech Journal of Food Sciences 34, No. 3 (2016): 197–203. http://dx.doi.org/10.17221/430/2015-cjfs.

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The antibacterial characteristics of orange pigment, which is one of the Monascus pigments, against Escherichia coli were investigated. Orange pigment exhibited strong antibacterial activity against E. coli evidenced by an increase in the diameter of inhibition zone with orange pigment treatment. The concentration of 2.5 mg/ml was the minimum inhibitory concentration of orange pigment against E. coli. Scanning electron microscopy revealed that orange pigment could damage bacterial cells, eventually resulting in cell death. The increase in the electric conductivity of bacterial cell suspensions

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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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Pereira da Costa, Daniel, Raphael Nogueira Bahiense, Daniele Salgueiro de Melo, et al. "Effect of Shrimp Feed Supplemented with Astaxanthin on Golden Apple Snail Pomacea diffusa." Ensaios e Ciência C Biológicas Agrárias e da Saúde 25, no. 2 (2021): 172–77. http://dx.doi.org/10.17921/1415-6938.2021v25n2p172-177.

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Popularmente conhecidas como ampulárias, esses moluscos gastrópodes são usualmente cultivados como organismos ornamentais pelo mundo. A coloração desses animais ornamentais é um dos pontos que atrai os seus admiradores e estimula sua aquisição no mercado. O pigmento mais difundido como suplemento para intensificação de cor em organismos aquáticos é a astaxantina. Ainda não existem rações específicas para a ampulária reforçando a necessidade de testar alternativas de alimentos e suplementos que melhorem o desempenho produtivo e a atratividade do animal. Os objetivos desse estudo foram mensurar

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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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Vega Gutierrez, Sarath M., Javier F. Illescas Guevara, Claudia C. Andersen, Jose Koechlin von Stein, and Seri C. Robinson. "Exploratory Sampling of Spalting Fungi in the Southern Peruvian Amazon Forest." Challenges 11, no. 2 (2020): 32. http://dx.doi.org/10.3390/challe11020032.

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Most of the research related to Peruvian Amazon fungi is focused on edible mushrooms and pathogens. Other important fungi, such as the spalting type (decay fungi that pigment wood internally), are not broadly studied, as most of them do not produce fruiting bodies and can be difficult to locate. Spalting fungi, however, are of broad economic importance due to their ability to produce pigments that enhance wood aesthetics, resulting in an increased economic value. In order to begin understanding the diversity of spalting fungi within certain regions of the Amazon, a sampling of downed trees and

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SUN, YANG, and STEVEN K. SHEVELL. "Rayleigh matches in carriers of inherited color vision defects: The contribution from the third L/M photopigment." Visual Neuroscience 25, no. 3 (2008): 455–62. http://dx.doi.org/10.1017/s0952523808080346.

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The mother or daughter of a male with an X-chromosome-linked red/green color defect is an obligate carrier of the color deficient gene array. According to the Lyonization hypothesis, a female carrier's defective gene is expressed and thus carriers may have more than two types of pigments in the L/M photopigment range. An open question is how a carrier's third cone pigment in the L/M range affects the postreceptoral neural signals encoding color. Here, a model considered how the signal from the third pigment pools with signals from the normal's two pigments in the L/M range. Three alternative a

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Studt, Lena, Philipp Wiemann, Karin Kleigrewe, Hans-Ulrich Humpf, and Bettina Tudzynski. "Biosynthesis of Fusarubins Accounts for Pigmentation of Fusarium fujikuroi Perithecia." Applied and Environmental Microbiology 78, no. 12 (2012): 4468–80. http://dx.doi.org/10.1128/aem.00823-12.

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ABSTRACTFusarium fujikuroiproduces a variety of secondary metabolites, of which polyketides form the most diverse group. Among these are the highly pigmented naphthoquinones, which have been shown to possess different functional properties for the fungus. A group of naphthoquinones, polyketides related to fusarubin, were identified inFusariumspp. more than 60 years ago, but neither the genes responsible for their formation nor their biological function has been discovered to date. In addition, although it is known that the sexual fruiting bodies in which the progeny of the fungus develops are

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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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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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Chan, Alexander Chak Lam, Luen Cheung Ho, William Wai Lun Yip, and Fung Ching Cheung. "Pigmented Ependymoma With Lipofuscin and Neuromelanin Production." Archives of Pathology & Laboratory Medicine 127, no. 7 (2003): 872–75. http://dx.doi.org/10.5858/2003-127-872-pewlan.

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Abstract We report an unusual case of ependymoma with pigmentation, a phenomenon that has only been described in a few cases, to our knowledge. This tumor occurred in the fourth ventricle of a 45-year-old man. It showed the typical histologic appearance of ependymoma with perivascular pseudorosettes and rare ependymal rosettes. Some tumor cells contained brown cytoplasmic pigment, which was shown histochemically to represent a mixture of lipofuscin and neuromelanin. The pigment was positive for acid-fast and periodic acid–Schiff stains and was also focally positive for Masson-Fontana and Schmo

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Vega Gutierrez, Sarath M., Derek W. Stone, Rui He, Patricia T. Vega Gutierrez, Zielle M. Walsh, and Seri C. Robinson. "Potential Use of the Pigments from Scytalidium cuboideum and Chlorociboria aeruginosa to Prevent ‘Greying’ Decking and Other Outdoor Wood Products." Coatings 11, no. 5 (2021): 511. http://dx.doi.org/10.3390/coatings11050511.

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UV-light degradation of wood is one of the top reasons for consumer replacement of outdoor wooden structures. This type of degradation is seldom mechanical, and is instead often motivated by loss of aesthetics (graying). There are numerous commercial products available on the market that deal with this loss of color, many of which contain added pigments to ‘rejuvenate’ or ‘revitalize’ greyed wood. These pigments are almost uniformly synthetic. In contrast, pigments from wood decay fungi (spalting), which have been used in woodworking since the 1400s (intarsia), have remarkable optical (UV-ligh

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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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