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Journal articles on the topic 'Pigment analysis'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Adrian, Melinda Margareta, Darus S. J. Paransa, James J. H. Paulus, Nickson J. Kawung, Robert A. Bara, and Rene Ch Kepel. "Analysis Of Types Of Carotenoid Pigments In Crab Sesarmops sp From Manado By Coast." Jurnal Ilmiah PLATAX 9, no. 2 (2021): 204. http://dx.doi.org/10.35800/jip.9.2.2021.35127.

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Carotenoid pigments are a group of pigments that are yellow, orange, and red-orange in color. Pigments are natural dyes found in plants and animals, extracts of carotenoid pigments can be separated by chromatographic methods where the common chromatographic methods in determining the type of pigment are Column Chromatography (CC) and Thin Layer Chromatography (TLC). The purpose of this study was to determine the types of pigments contained in the carapace extract of the male crab Sesarmops sp. The Sesarmops sp crab has a brown dorsal carapace with blackish-brown leg spots known as mangrove cra

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Pesang, Martice Desi, James Ngginak, Alfred Gasper Onisimus Kase, and Coni Lisandra Balle Bisilissin. "Komposisi Pigmen pada Ulva sp., Padina australis dan Hypnea sp. dari Pantai Tablolong Provinsi Nusa Tenggara Timur." Jurnal Kelautan Tropis 23, no. 2 (2020): 225–33. http://dx.doi.org/10.14710/jkt.v23i2.5912.

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Indonesia has marine biological natural resources consisting of fish, seaweed, crabs and shrimp which are very potential. The purpose of this study was to determine the composition of pigments in Ulva sp (Chlorophyta), Padina australis (Paeophyta) and Hypnea sp (Rhodophyta) obtained from Tablolong waters. The method used in this research is descriptive qualitative and quantitative. Proof of pigment in samples using thin layer chromatography (TLC). The results of pigment analysis of Ulva sp obtained twelve color spots with identified pigment types consisting of chlorophyll a, chlorophyll b, xan

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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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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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Jadhav, Pooja Vijay, Sarika Bhalerao, S. B. Ghuge, and Gaurav Pramod Thorat. "Comparative Analysis and Characterization of Yellow and Red Pigment in Safflower (Carthamus tinctorius L.)." PLANT CELL BIOTECHNOLOGY AND MOLECULAR BIOLOGY 26, no. 7-8 (2025): 310–21. https://doi.org/10.56557/pcbmb/2025/v26i7-89492.

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This study explores the extraction, identification, and quantification of safflower red (carthamin) and yellow (carthamidin) pigments, important for use in food, textiles, cosmetics, and pharmaceuticals. Carthamin forms from its yellow precursor, precarthamine, through oxidation during flower maturation. Yellow pigment was extracted with distilled water, and red with Sodium carbonate. Pigments were characterized spectrophotometrically, quantified using a Rutin standard curve, and identified via TLC by comparing Rf values with standards flavonoids. Petals of thirty safflower genotypes exhibitin

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Tjokro Atmodjo, Felix Adrian, Kestrilia Rega Prilianti, and Hendry Setiawan. "Implementasi Perbaikan Kualitas Citra Tanaman terhadap Perbedaan Kamera untuk Prediksi Pigmen Fotosintesis berbasis Machine Learning." Jurnal Buana Informatika 14, no. 01 (2023): 30–39. http://dx.doi.org/10.24002/jbi.v14i01.6997.

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Implementation of Plant Image Quality Improvement based on Machine Learning on Camera Variation to Predict Photosynthetic Pigments. Pigments are natural dyes found in plants and animals. In photosynthesis, there are 3 essential pigments: chlorophyll, cartenoid, and anthocyanin. Pigment analysis can be performed with High Performance Liquid Chromatography (HPLC) and a spectrophotometer. However, HPLC and spectrophotometers require high resources and time. Thus, the Fuzzy Piction Android application built using the FP3Net model is the best choice in pigment prediction since it is low on cost and

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Tan, Jianchao, Stephen DiVerdi, Jingwan Lu, and Yotam Gingold. "Pigmento: Pigment-Based Image Analysis and Editing." IEEE Transactions on Visualization and Computer Graphics 25, no. 9 (2019): 2791–803. http://dx.doi.org/10.1109/tvcg.2018.2858238.

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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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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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Chaves, Claudiane Aparecida Rocha, Diogo Alvarenga Miranda, Adriano Geraldo, Luiz Carlos Machado, Jean Kaique Valentim, and Rodrigo Garófallo Garcia. "Natural and synthetic pigments in sorghum-based diets for laying hens." Acta Scientiarum. Animal Sciences 44 (April 29, 2022): e53060. http://dx.doi.org/10.4025/actascianimsci.v44i1.53060.

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The objective of this work was to evaluate the supplementation of yellow natural pigment levels based on Marigold Flower extract (2%) and yellow synthetic pigment (Carophyll Yellow 10%) in sorghum-based rations for commercial laying hens and their influence on bird performance and egg quality. A completely randomized design was adopted with 5 treatments, 6 replicates, and 5 laying hens in each repetition. The treatments evaluated were: Sorghum based diet without supplementation with pigmentant - Negative Control; 150 g t-1 of Yellow Natural Pigment feed; 300 g t-1 of yellow natural pigment fee

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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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Djunaedi, Ali, Chrisna Adi Suryono, and Sardjito Sardjito. "Kandungan Pigmen Polar Dan Biomassa Pada Mikroalga Dunaliella Salina Dengan Salinitas Berbeda." Jurnal Kelautan Tropis 20, no. 1 (2017): 1. http://dx.doi.org/10.14710/jkt.v20i1.1347.

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Polar pigments content and biomass of Dunaliella salina are affected by salinity related to osmotic pressure and density of media. This study was to determine the effect of salinity on pigment contents and dried biomass of microalgae D. salina. The cultivation used microalgae derived from Balai Besar Pengembangan Budidaya Air Payau (BBPBAP), Jepara. Research method was the Laboratory study with a Completely Randomized Design (CRD). Consisting of one treatment with five stages of salinity treatments: 20 ppt, 25 ppt, 30 ppt, 35 ppt, and 40 ppt and using three times of repetition. Analysis of pig

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Djunaedi, Ali, Sunaryo Sunaryo, Chrisna Adi Suryono, and Adi Santosa. "Kandungan Pigmen Fikobiliprotein dan Biomassa Mikroalga Chlorella vulgaris pada media dengan Salinitas Berbeda." Jurnal Kelautan Tropis 20, no. 2 (2017): 112. http://dx.doi.org/10.14710/jkt.v20i2.1736.

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Phyobilliprotein (phycocyanin and allophycocyanin) pigments content and biomass of Chlorella vulgarisare affected by salinity related to osmotic pressure and density of media. This study was to determine the effect of salinity on phycobiliproteins pigment contents and biomass of microalgae Chlorella vulgaris. The cultivation used microalgae derived from Balai Besar Pengembangan Budidaya Air Payau (BBPBAP), Jepara. Research method was the Laboratory study with a Completely Randomized Design (CRD). Consisting of one treatment with five stages of salinity treatments: 20, 25, 30, 35, and 40 ppt an

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Taşçı, Selim. "Investigation of the Use of Pink Pigment Obtained by Using Different Mineralisers in Wall Tile Glaze Recipes." ICONTECH INTERNATIONAL JOURNAL 8, no. 1 (2024): 8–18. https://doi.org/10.5281/zenodo.13366043.

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Oxide and pigment components are used in the colouring of glazes applied to ceramic products. Pigment production process is a complex process involving different stages. Pigment production process, such as grinding, mineraliser addition and calcination are the most important parameters in the emergence of colour. The rapid firing process in the wall tile production process affects the colour intensity and colour quality of the pigment component used in the glaze recipe in the final product. In this research, pigments were produced using Ca-borate and Mg-sulfate mineralizers, and their impact o

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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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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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Fauziah, Anna, Dietriech G. Bengen, Mujizat Kawaroe, Hefni Effendi, and Majariana Krisanti. "HUBUNGAN ANTARA KETERSEDIAAN CAHAYA MATAHARI DAN KONSENTRASI PIGMEN FOTOSINTETIK DI PERAIRAN SELAT BALI." Jurnal Ilmu dan Teknologi Kelautan Tropis 11, no. 1 (2019): 37–48. http://dx.doi.org/10.29244/jitkt.v11i1.23108.

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ABSTRAKCahaya matahari merupakan salah satu faktor lingkungan terpenting baik secara langsung maupun tidak langsung bagi organisme fotosintetik perairan dalam menyediakan energi untuk diubah menjadi energi kimia dengan bantuan klorofil. Penelitian ini bertujuan untuk mengkaji hubungan antara ketersediaan cahaya matahari dan konsentrasi pigmen fotosintetik di Perairan Selat Bali. Penelitian dilaksanakan pada pagi, siang dan sore hari pada lima stasiun penelitian di Perairan Selat Bali. Analisis korelasi kanonik digunakan untuk mengetahui hubungan antara ketersediaan cahaya matahari dan pembentu

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Rodler-Rørbo, Alexandra. "Colour in a new light: origins, trade and cultural significance of ancient pigments." Project Repository Journal 22, no. 1 (2025): 54–57. https://doi.org/10.54050/prj2222836.

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Colour in a new light: origins, trade and cultural significance of ancient pigments The ERC Starting Grant project HUE focuses on the provenance and production technology of ancient pigments from the late Bronze Age to the 1st century CE. We develop a much-needed pigment-specific reference database and test relevant tracers to improve comparative analysis. With HUE’s open-access pigment repository and map, we provide new research tools for future pigment and ancient polychromy research.

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Kang, Yeong Seok, Seong Woo Mun, Myoung Nam Kim, Ga-Hyun Hwang, Jin Young Hong, and Sun Myung Lee. "A Study on the Characteristics of Red Pigments According to the Type of Natural Raw Materials." Journal of Conservation Science 40, no. 4 (2024): 398–408. https://doi.org/10.12654/jcs.2024.40.4.04.

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In this study, to evaluate the application of natural raw material minerals, red pigments were manufactured using four types of red-brown soils and two types of rocks (shale and pumice) produced domestically, and component analysis, physical property analysis, an accelerated weathering test, and antifungal effect analysis were performed. The manufactured pigment contained hematite, whose main constituent mineral is known be a red chromogenic mineral, and the Fe content was relatively high at 12.4% to 27.2%. The average particle size of the red pigments was less than 30 μm and its opacity was m

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Mokoginta, Fatika Sari, Darus Saadah Johanis Paransa, Kurnati Kemer, James J. H. Paulus, Nickson J. Kawung, and Henky Manoppo. "Analysis of Carotenoid Pigment Types in the Carapace of the Male Crab Grapsus albolinetaus Latreille in Milbert 1812." Jurnal Ilmiah PLATAX 9, no. 1 (2021): 132. http://dx.doi.org/10.35800/jip.9.1.2021.34421.

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Carotenoid pigments have various colors such as yellow, orange, or red-orange. One of the carotenoid pigment sources is Crab G. albolineatus Latreille in Milbert 1812. Column chromatography separation technique was used to determine the metabolism of carotenoid pigments in the crab G. albolineatus latreille in Milbert 1812. This CC separation used hexane and acetone as the developer solution (70:30). The developer solution as known as the mobile phase is semipolar, while the stationary phase is silica powder G60. Therefore, it formed two metabolic pathways. The male G. albolineatus crab used i

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Mun, Seong Woo, Sun Myung Lee, Jongseo Park, Young Seok Kang, and Ji Sun Kim. "A Study on Painting Characteristics by Analysis of Pigments Used in Unhangak Hall Dancheong in Hwaryeongjeon Shrine, Suwon." Journal of Conservation Science 38, no. 5 (2022): 430–43. http://dx.doi.org/10.12654/jcs.2022.38.5.07.

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A microscopy investigation has been performed together with non-destructive component analysis to verify properties of pigments used in Unhangak Hall Dancheong in Hwaryeongjeon Shrine, Suwon. In addition, X-ray diffraction analysis, polarization microscopy, and scanning electron microscopy analyses were performed on the pigment specimens collected at the site. Dividing the Unhangak interior into areas and performing pigment property analyses has confirmed that the pigments Jusa, Jangdan, and Sukganju (iron oxide, red ocher) have been used for red colors. Jahwang, Gold, and Gamboge (organic pig

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Sun, Feng M., Guang Y. Shi, and Hui W. Wang. "Differentiation of Pigment in Eggs Using Carbon (13C/12C) and Nitrogen (15N/14N) Stable Isotopes." Journal of AOAC INTERNATIONAL 99, no. 4 (2016): 1032–37. http://dx.doi.org/10.5740/jaoacint.16-0071.

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Abstract Consumers prefer natural and healthy food, but artificial pigments are often abused in egg products. The study aimed at differentiating the origin of pigments in eggs by applying the technique of carbon (13C/12C) and nitrogen (15N/14N) stable isotope analysis. Five hundred sixty laying hens were randomly distributed into 14 treatments, which were divided into four groups: maize, carophyll red pigment, carophyll yellow pigment, and a mixture of carophyll red and yellow pigments. Eggs were collected and pretreated to determe the values of the Roche Yolk Color Fan (RCF), δ13C, and δ15N.

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Bilbao, J., and S. Seoane. "PIGMENTUM: an easy pigment-based tool for monitoring phytoplankton community composition." Marine Ecology Progress Series 729 (February 22, 2024): 31–45. http://dx.doi.org/10.3354/meps14518.

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Phytoplankton monitoring is essential for understanding the functioning of aquatic ecosystems and for assessing water quality. Based on pigment analysis, different mathematical tools have been developed to relate pigments and phytoplankton groups and determine the contribution of each of these groups to the total phytoplankton biomass. However, most of these tools have several drawbacks, such as the need for a minimum sample number or previous knowledge on community composition. The present study proposes a new chemotaxonomic tool, ‘PIGMENTUM’, based on simultaneous equations that take into ac

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Yoo, Seon-Young, Buddakoralelage Janani Namal Seneviratne, and Gyu-Ho Kim. "A Characteristic Analysis on Clay Pigments of Mural Paintings in Sri Lanka." Journal of Conservation Science 38, no. 4 (2022): 327–33. http://dx.doi.org/10.12654/jcs.2022.38.4.07.

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Sri Lanka has four types of mural painting styles; Classic, Late Classic, Kandyan, and Southern styles, but there is little research on scientific analysis for mural paintings. In this study, we analyze white, yellow, and red clay pigments which were collected from ancient producing sites. Analyzing pigment samples shows that samples are containing aluminum oxide(Al<sub>2</sub>O<sub>3</sub>) and silicon dioxide(SiO<sub>2</sub>) which are connected to the soil. And a degree of iron oxidation determines yellow or red colors. To understand the characteristics o

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Kim, Seon Hee, Jihye Lee, Yun Jung Jang, Kang-Bong Lee, and Yeonhee Lee. "ToF-SIMS and AFM Characterization of Brown Cosmetic Contact Lenses: From Structural Analysis to the Identification of Pigments." Journal of Analytical Methods in Chemistry 2020 (January 22, 2020): 1–11. http://dx.doi.org/10.1155/2020/6134627.

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Over the years, soft contact lenses for vision correction and cosmetic and therapeutic purposes have been greatly improved. For cosmetic contact lenses, the pigments need to be nontoxic, and the position of the pigment layer is particularly important because of the risks posed by pigment elution and the roughness of the lens surface. In this paper, we characterized the properties of brown cosmetic contact lenses made by three different manufacturers using surface analytical techniques. The surface topographies of the noncolored and colored parts were obtained by atomic force microscopy (AFM),

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Srianta, I., I. Nugerahani, and S. Ristiarini. "Separation and analysis of Monascus yellow pigment produced on durian seed substrate." Food Research 4, no. 4 (2020): 1135–39. http://dx.doi.org/10.26656/fr.2017.4(4).020.

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This research was aimed to separate and analyse Monascus yellow pigment (MYP) with chromatography. MYP was in a mixture with red and orange pigments. MYP separation was performed in a silica gel column with eluent of ethyl acetate: ethanol: water = 90: 25: 4. The separated MYP were then subjected to analysis by using spectrophotometer, TLC, LC-PDA and LC-MS/MS. The results revealed that the separated MYP has a maximum absorption at 386 nm. Out of five MYP compounds detected by using LC-MS/MS, two of them were well known yellow pigment compounds, monascin and ankaflavin. Monascin and yellow II

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Daramola, Ifeoluwa V., and Kehinde O. Awojobi. "Bioproduction and Application of Orange and Yellow Pigments Obtained from Chryseomicrobium palamuruense and Micrococcus luteus." Journal of Advances in Microbiology 23, no. 8 (2023): 36–50. http://dx.doi.org/10.9734/jamb/2023/v23i8742.

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Colour is a fundamental and most likely one of the primary attributes to be observed by the human senses, making it an essential part of human life and culture. This study investigates the bioproduction and potential application of bacterial pigments obtained from abattoir wastewater. Bacteria isolates recovered from abattoir wastewater were screened for pigment production and identified using the 16S rRNA gene sequence. Optimal physicochemical conditions of parameters were investigated and harnessed for bulk pigment production. Pigments produced were characterised using UV-Visible Spectrophot

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Kougemitrou, I., G. Economou, J. Giovanopoulos, I. Baziotis, G. Leontakianakos, and V. Stathopoulos. "A mineralogical study of pigments used in two Iakovidis paintings: Verification of artwork authenticity using Raman micro-spectroscopy method." Bulletin of the Geological Society of Greece 47, no. 1 (2013): 392. http://dx.doi.org/10.12681/bgsg.11014.

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For the purpose of the current study, we examined two paintings, an original and a fake one, entitled “Still life with grapes”, and claimed both to be created from the Greek Painter G. Iakovidis. The current Research Project has been carried out at the Centre Nikias, an innovative Research Centre specialised on certification, maintenance and restoration of art works. Raman spectroscopic analysis has been carried to verify the authenticity of the used pigments and also the originality of the two paintings. The Raman spectra acquired confirmed four different colours in both painting`s pigments:

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Soundhari, C., and K. B. Haripriya. "Extraction and characterization of antimicrobial pigment from marine bacteria and testing of antimicrobial activity against penicillin resistant." International Journal of Pharmaceutical Chemistry and Analysis 9, no. 1 (2022): 50–55. http://dx.doi.org/10.18231/j.ijpca.2022.008.

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The current study shows the extraction of pigment from pigment producing bacteria isolated from marine sediment. The isolation of pigment producing bacteria was done by spread plate method. The marine nutrient medium was used for the isolation procedure. Further, subculture was followed to get desired pure culture. From the isolated culture, various preliminary test, biochemical test, molecular characterization and antimicrobial activity were performed. To extract the pigment a solvent centrifugation process was carried out. The extracted pigment was tested against drug resistant Staphylococcu

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Xing, Lili, Lingyu Wang, Shilin Liu, Lina Sun, Gary M. Wessel, and Hongsheng Yang. "Single-Cell Transcriptome and Pigment Biochemistry Analysis Reveals the Potential for the High Nutritional and Medicinal Value of Purple Sea Cucumbers." International Journal of Molecular Sciences 24, no. 15 (2023): 12213. http://dx.doi.org/10.3390/ijms241512213.

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The sea cucumber Apostichopus japonicus has important nutritional and medicinal value. Unfortunately, we know little of the source of active chemicals in this animal, but the plentiful pigments of these animals are thought to function in intriguing ways for translation into clinical and food chemistry usage. Here, we found key cell groups with the gene activity predicted for the color morphology of sea cucumber body using single-cell RNA-seq. We refer to these cell populations as melanocytes and quinocytes, which are responsible for the synthesis of melanin and quinone pigments, respectively.

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Pyeon, Sujeong, Gyuyong Kim, Gyeongcheol Choe, et al. "Compressive-Strength Analysis of High-Strength Cementitious Composites Mixed with Red and Green Pigments." Applied Sciences 12, no. 15 (2022): 7667. http://dx.doi.org/10.3390/app12157667.

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We estimate the mechanical properties of pigment-containing ultra-high-strength cement composites (UHSCCs) and the pigment-induced changes in their physical properties via thermal and X-ray diffraction analyses. Hydrates in samples are analyzed using thermogravimetry. Additionally, the change in color expression with the UHSCC age is examined via the Commission Internationale de l’ Éclairage L*a*b* analysis. Correlation analysis is performed to determine linear relationships between experimental factors by calculating R2. A change in hydrate expression is confirmed as the strength increases wi

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Zlaugotne, Beate, Fabian Andres Diaz Sanchez, Jelena Pubule, and Dagnija Blumberga. "Life Cycle Impact Assessment of Microalgae and Synthetic Astaxanthin Pigments." Environmental and Climate Technologies 27, no. 1 (2023): 233–42. http://dx.doi.org/10.2478/rtuect-2023-0018.

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Abstract The marketability of fish depends on the visual appearance of the fish, so the feed ingredient pigment contributes to the nutritional value and visual appearance of the product. The benefits of a natural pigment derived from microalgae are the ecological benefits, as the culture can fix carbon and release oxygen. The economic aspect is a benefit of synthetic pigments. The Life Cycle Assessment (LCA) method was used to determine the environmental impact of natural and synthetic pigments. The results obtained from the LCA are expressed according to the impact categories defined by the P

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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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Mulik, Anuradha, Priyanka Kumbhar, and Rama Bhadekar. "PRODUCTION AND PARTIAL CHARACTERIZATION OF PIGMENTS PRODUCED BY KOCURIA SP BRI 36: INFLUENCE OF HEAVY METALS." International Journal of Pharmacy and Pharmaceutical Sciences 9, no. 10 (2017): 137. http://dx.doi.org/10.22159/ijpps.2017v9i10.20831.

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Objective: To study the production of pigments by Kocuria sp. BRI 36, their characteristics and influence of heavy metals on pigments.Methods: The effects of various physical and chemical parameters on pigments production by Kocuria sp. BRI 36 were examined. Pigments were extracted and partially characterised by Thin Layer Chromatography (TLC) and Fourier Transform Infrared Spectroscopy (FTIR). The effects of heavy metals such as Pb2+, Cd 2+, Ni2+ and Cr3+ were studied on pigment production. Antimicrobial activity and stability studies of crude pigment were also conducted.Results: Kocuria sp.

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Mokrzynski, Krystian, Mateusz Wojtala, Maciej Sulkowski, et al. "Photoreactive Properties of Melanin Obtained from Human Induced Pluripotent Stem Cell-Derived Melanocytes." International Journal of Molecular Sciences 26, no. 9 (2025): 4119. https://doi.org/10.3390/ijms26094119.

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Although melanin is viewed as a natural sunscreen that protects pigmented cells against the adverse effects of solar radiation, recent studies have demonstrated that, under certain conditions, the pigment can actually contribute to light-induced oxidative damage of the cells. However, the main issue with such studies is finding natural pigments without photooxidative modifications. Recently, melanin obtained from melanocytes, generated from human induced pluripotent stem cells (hiPSC-Mel), was suggested as a promising source of the pigment without significant photooxidation. Although different

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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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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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Komyshev, E. G., M. A. Genaev, I. D. Busov, et al. "Determination of the melanin and anthocyanin content in barley grains by digital image analysis using machine learning methods." Vavilov Journal of Genetics and Breeding 27, no. 7 (2023): 859–68. http://dx.doi.org/10.18699/vjgb-23-99.

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The pigment composition of plant seed coat affects important properties such as resistance to pathogens, pre-harvest sprouting, and mechanical hardness. The dark color of barley (Hordeum vulgare L.) grain can be attributed to the synthesis and accumulation of two groups of pigments. Blue and purple grain color is associated with the biosynthesis of anthocyanins. Gray and black grain color is caused by melanin. These pigments may accumulate in the grain shells both individually and together. Therefore, it is difficult to visually distinguish which pigments are responsible for the dark color of

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Makhmur, Ahmad, and Prasad Panda Bibhu. "Biopigments Produced by Monascus purpureus Through Solid State Fermentation: HPTLC Finger Printing Analysis." SVOA Microbiology 4, no. 1 (2023): 01–12. https://doi.org/10.58624/SVOAMB.2023.04.024.

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The current study aims to conduct HPTLC finger printing analysis of various extracts of Monascus purpureus biopigments (water extract, acetone extract, chloroform extract, acetonitrile extract, petroleum ether extract, methanol extract, ethanol extract, hexane extract). Natural and synthetic pigments both play an important roles as biocolourants in the food and pharmaceutical industries. The most recent HPTLC technique helps useful fingerprint analysis to determine the identity and composition of natural phytomolecules. Solid state fermentation was carried out with the help of a production med

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Lian, Lijin, Xuejuan Hu, Zhenhong Huang, Liang Hu, and Lu Xu. "Pigment analysis based on a line-scanning fluorescence hyperspectral imaging microscope combined with multivariate curve resolution." PLOS ONE 16, no. 8 (2021): e0254864. http://dx.doi.org/10.1371/journal.pone.0254864.

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A rapid and cost-effective system is vital for the detection of harmful algae that causes environmental problems in terms of water quality. The approach for algae detection was to capture images based on hyperspectral fluorescence imaging microscope by detecting specific fluorescence signatures. With the high degree of overlapping spectra of algae, the distribution of pigment in the region of interest was unknown according to a previous report. We propose an optimization method of multivariate curve resolution (MCR) to improve the performance of pigment analysis. The reconstruction image descr

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MA, JIAN-XING, MASAHIRO KONO, LIN XU, et al. "Salamander UV cone pigment: Sequence, expression, and spectral properties." Visual Neuroscience 18, no. 3 (2001): 393–99. http://dx.doi.org/10.1017/s0952523801183057.

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The visual pigment from the ultraviolet (UV) cone photoreceptor of the tiger salamander has been cloned, expressed, and characterized. The cDNA contains a full-length open reading frame encoding 347 amino acids. The phylogenetic analysis indicates that the highest sequence homology is to the visual pigments in the S group. The UV opsin was tagged at the carboxy-terminus with the sequence for the 1D4 epitope. This fusion opsin was expressed in COS-1 cells, regenerated with 11-cis retinal (A1) and immuno-purified, yielding a pigment with an absorbance maximum (λmax) of 356 nm which is blue shift

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Kang, Jae-Joong, Jun-Oh Min, Huitae Joo, Seok-Hyun Youn, and Sang-Heon Lee. "Photophysiological Characterization of Phytoplankton by Measuring Pigment Production Rates: A Description of Detail Method and a Case Study." Journal of Marine Science and Engineering 11, no. 10 (2023): 1859. http://dx.doi.org/10.3390/jmse11101859.

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Each phytoplankton species has intrinsic pigments, which result in different photophysiological characteristics in response to natural light conditions. Therefore, phytoplankton pigments provide important information on the photosynthetic activity that produces the basic food source for marine ecosystems. This study addresses the challenge of accurately measuring pigment production rates in phytoplankton communities. Two strategies are proposed for improving measurement sensitivity. Firstly, increasing the injection of 13C substrate into incubation bottles up to 15% of the total dissolved inor

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Venkatachalam, Mekala, Alain Shum-Chéong-Sing, Yanis Caro, Laurent Dufossé, and Mireille Fouillaud. "OVAT Analysis and Response Surface Methodology Based on Nutrient Sources for Optimization of Pigment Production in the Marine-Derived Fungus Talaromyces albobiverticillius 30548 Submerged Fermentation." Marine Drugs 19, no. 5 (2021): 248. http://dx.doi.org/10.3390/md19050248.

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Pigment production from filamentous fungi is gaining interest due to the diversity of fungal species, the variety of compounds synthesized, and the possibility of controlled massive productions. The Talaromyces species produce a large panel of metabolites, including Monascus-like azaphilone pigments, with potential use as natural colorants in industrial applications. Optimizing pigment production from fungal strains grown on different carbon and nitrogen sources, using statistical methods, is widespread nowadays. The present work is the first in an attempt to optimize pigments production in a

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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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Mladenović, Ivana O., Marija M. Vuksanović, Stevan P. Dimitrijević, et al. "Mechanical Properties of Electrolytically Produced Copper Coatings Reinforced with Pigment Particles." Metals 13, no. 12 (2023): 1979. http://dx.doi.org/10.3390/met13121979.

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Copper from sulfate baths without and with added inorganic pigment particles based on strontium aluminate doped with europium and dysprosium (SrAl2O4: Eu2+, Dy3+) was electrodeposited on a brass cathode by a galvanostatic regime. Morphological, structural, and roughness analysis of the pigment particles, the pure (pigment-free) Cu coating, and the Cu coatings with incorporated pigment particles were performed using SEM, XRD, and AFM techniques, respectively. Hardness and creep resistance were considered for the examination of the mechanical properties of the Cu coatings, applying Chicot–Lesage

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Đinh, Thị Vân, Thanh Vân Đoàn, Đức Chính Vũ, Đức Mạnh Lê, Văn Huy Vũ та Thị Thu Xuân Nguyễn. "NGHIÊN CỨU TỔNG HỢP PIGMENT MgCr2O4 KÍCH CỠ NANOMET". Tạp chí Khoa học và Công nghệ Nhiệt đới, № 24 (16 березня 2025): 225–31. https://doi.org/10.58334/vrtc.jtst.n24.23.

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STUDY ON NANOSCALE MgCr2O4 PIGMENT SYNTHESISThis article presents procedure for the synthesis of nanoscale pigments MgCr2O4 by method of creating intermediate metal-organic complexes in solution. The particle size, thermogravimetric analysis (TGA) and some selected physico-chemical properties such as: specific gravity, pH, thermal stability, acid and baseresistance were investigated. Experimental results show that the pigment MgCr2O4 synthesized by this method has good properties, ensuring the requirements of pigments on the market.

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Sayed, Gehad H. El, Mohamed Fadel, and Mohamed Marzouk. "Optimization, a Potential Production, GC-MS and Characterization of Dark Green Pigment from New Local Isolate Streptomyces nigra Strain GH12." Journal of Advances in Biology & Biotechnology 26, no. 9 (2023): 11–29. http://dx.doi.org/10.9734/jabb/2023/v26i9653.

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Due to increasing health awareness among consumers and the identification of novel pharmacological properties of diverse natural pigments, the market for natural pigments is currently seeing rapid growth. Streptomyces. nigra GH12, a new Actinomycete isolate identified by 16S rRNA used for dark green pigment production. Manipulations of the factors affecting pigment production are the most effective way to have maximum yield of pigment. Starch 2.5% (w/v), ammonium nitrate 0.2% (w/v), dibasic sodium phosphate 0.1% (w/v), inoculums size 6% (v/v), initial pH level of 8, 150 rpm rotation speed, 37

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Liu, Zhaojun, Wenzhong Xu, Yongjian Zhang, Yingying Wang, and Jinwei Li. "Identification of the Pigments on the Mural Paintings from an Ancient Chinese Tomb of Tang Dynasty Using Micro-Raman and Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy Analysis." Minerals 13, no. 9 (2023): 1224. http://dx.doi.org/10.3390/min13091224.

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The tomb of Hanxiu, a prime minister of the Tang dynasty who died in 740 CE, was decorated with elaborate mural paintings. The pigments used in the mural paintings were collected from representative colours before a restoration process and analyzed using micro-Raman and scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM-EDS) analysis to characterize the chemical compositions. The results reveal the chromatic palette and the painting technique used in the mural paintings. Most of the pigments are natural mineral pigments similar to those excavated in previous archaeological

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Zakharova, Yu R., A. S. Martsinechko, A. M. Marchenkov, D. P. Petrova, and G. A. Fedorova. "Production of the violet pigment violacein by psychrophilic strains of bacteria: extraction and identification." Limnology and Freshwater Biology, no. 4 (2024): 1149–54. http://dx.doi.org/10.31951/2658-3518-2024-a-4-1149.

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Psychrophilic pigment-forming strains, isolated from Lake Baikal and the Pokhabikha River, were studied. Based on culture-based, morphological, and biochemical properties, as well as the results of 16S rRNA gene sequence analysis, the studied bacteria were assigned to the genera Janthinobacterium and Iodobacter. The strains are able to form biofilms and produce violet pigment. When the pigments were extracted with methanol and identified by MALDI/TOF mass spectrometry, the pigments violacein and deoxyviolacein were identified.

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Grigale-Soročina, Zane, Ingmārs Birks, and Mārtiņš Kalniņš. "Analysis of Pigment Process and Production Techniques for Use in Nail Polish Systems." Solid State Phenomena 267 (October 2017): 7–11. http://dx.doi.org/10.4028/www.scientific.net/ssp.267.7.

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This report explores two key manufacturing processes, and assesses multiple parameters for optimization of these processes. High shear dispersion using a rotor-stator style homogenizer and high-energy grinding using a basket type mill with zirconium balls as the grinding media were studied. The variation between grinding organic and inorganic pigments was assessed as they give different challenges and require different operations to produce successful results. Obtaining the correct particle size distribution of pigments for decorative coatings is of paramount importance for achieving a high qu

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