Journal articles: 'Colour aberration'

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Bora, Neeraj, Chiranjib Bora, Smiti Rekha Sharma, and Jyotismita Das. "First photographic record of a colour aberrant Spotted Dove Spilopelia chinensis from the Brahmaputra valley of Assam, India." Ornis Hungarica 32, no. 1 (2024): 238–42. http://dx.doi.org/10.2478/orhu-2024-0018.

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Abstract Colour aberrations are rare conditions in birds that are caused by genetic as well as environmental factors. Among the colour aberrations in birds, albino, leucism, progressive greying, brown, dilution, ino, and melanism are the best known. This report describes an observation of colour aberration in a Spotted Dove (Spilopelia chinensis suratensis) from India. It was recorded in the Deobali Jalah (an IBA site) of Nagaon district, Assam. The recorded individual exhibited a pale plumage with normal eyes and some light brown colour in some of the feathers, indicating this to be a form of dilution. The report also represents the first photographic documentation of colour aberration in Spotted Doves from Brahmaputra Valley of Assam, India. Further research is necessary to comprehend the causes of colour aberration in Spotted Doves.

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Lichti, D. D., D. Jarron, M. Shahbazi, P. Helmholz, and R. Radovanovic. "INVESTIGATION INTO THE BEHAVIOUR AND MODELLING OF CHROMATIC ABERRATIONS IN NON-METRIC DIGITAL CAMERAS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W18 (November 29, 2019): 99–106. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w18-99-2019.

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Abstract. Chromatic aberration in colour digital camera imagery can affect the accuracy of photogrammetric reconstruction. Both longitudinal and transverse chromatic aberrations can be effectively modelled by making separate measurements in each of the blue, green and red colour bands and performing a specialized self-calibrating bundle adjustment. This paper presents the results of an investigation with two aims. The first aim is to quantify the presence of chromatic aberration in two sets of cameras: the six individual cameras comprising a Ladybug5 system, calibrated simultaneously in air; and four GoPro Hero 5 cameras calibrated independently under water. The second aim is to investigate the impacts of imposing different constraints in the self-calibration adjustment. To this end, four different adjustment cases were performed for all ten cameras: independent adjustment of the observations from each colour band; combined adjustment of all colour bands’ observations with common object points; combined adjustment of all colour bands with common object points and common exterior orientation parameters for each colour band triplet; and combined adjustment with common object points and certain common interior orientation parameters. The results show that the Ladybug5 cameras exhibit a small (1-2 pixel) amount of transverse chromatic aberration but no longitudinal chromatic aberration. The GoPro Hero 5 cameras exhibit significant (25 pixel) transverse chromatic aberration as well as longitudinal chromatic aberration. The principal distance was essentially independent of the adjustment case for the Ladybug5, but it was not for the GoPro Hero 5. The principal point position and precision were both affected considerably by adjustment case. Radial lens distortion was invariant to the adjustment case. The impact of adjustment case on decentring distortion was minimal in both cases.

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van Grouw, Hein. "What Colour Is That Sparrow? A Case Study: Colour Aberrations In The House Sparrow Passer Domesticus." International Studies on Sparrows 36, no. 1 (2012): 30–55. http://dx.doi.org/10.1515/isspar-2015-0012.

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Abstract In this paper 16 distinct, heritable colour aberrations (mutations) in the House Sparrow are described, based on specimens found in museum collections, records of individuals seen in the wild and from bird breeders keeping aberrant coloured sparrows in captivity. Based on the frequency found in the museum specimens Brown is the most common mutation in the House Sparrow, followed by Ino and Albino. Besides the mutations there is also a, presumably, non-heritable aberration called Progressive Greying described. Progressive Greying is in fact by far the most common colour aberration found in the species but was, in the past, always assigned as ‘Partial Albino’ without its real nature being understood. This paper will give some insight in the nature of Progressive Greying.

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Mahabal, Anil, Radheshyam Murlidhar Sharma, Rajgopal Narsinha Patil, and Shrikant Jadhav. "Colour aberration in Indian mammals: a review from 1886 to 2017." Journal of Threatened Taxa 11, no. 6 (2019): 13690–719. http://dx.doi.org/10.11609/jott.3843.11.6.13690-13719.

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The phenomena of colour aberration (albinism, leucism, piebaldism, melanism, hypomelanism, and blue-eyed colour morph) is reported in various mammalian species throughout the world including India. A total of 239 such instances in Indian mammals was tabulated in this study along with maps showing locations of the records. The records from 1886 to 2017 (till July) were gathered from published scientific literature, magazines, and images uploaded on various websites. The records were reviewed along with their order-wise and family-wise representation and were analyzed. Appropriate identification of colour aberration was attempted on the basis of any presented evidence. Altogether, 56 (out of 421) mammalian species belonging to eight orders and 19 families were reported to exhibit various types of colour aberrations, amounting to 13.3% of the total mammalian species found in India. Of these, albinos constituted 21.8%, leucistic 14.2%, piebald 5.4%, melanistic 25.5%, hypomelanistic 18.4%, and blue-eyed white morph 1.3%; the remaining 13.4% was undetermined. The study highlights 1) the absence of records of colour aberrations in the largest mammal family Vespertilionidae, which contrasts with studies elsewhere, 2) the persistent occurrence of albinos in Spotted Deer and Blackbucks in Gujarat, 3) the high number of melanistic leopards in India over the years and recent instances of melanistic Asian Golden Cats in Sikkim, 4) regular records of hypomelanism in Gaurs of the southern Western Ghats except in the last few years. Overall, a need for further studies in colour aberration in mammals is urged.

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Alby, Mattathil Jacob, Cheruthottunkara Purushothaman Ashwin, and Moolumkudy Suresh Arjun. "A photographic record of partial leucism in Greater Coucal Centropus sinensis (Stephens, 1815) (Cuculiformes: Cuculidae) from Chhattisgarh, India." Ornis Hungarica 31, no. 1 (2023): 197–201. http://dx.doi.org/10.2478/orhu-2023-0013.

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Abstract Leucism is a colour anomaly defined by a lack of pigmentation, which may be partial or full in any individual. Although genetic and environmental factors contribute to a high incidence of plumage colour aberrations in wild birds, the true incidence of these aberrations in wild populations has been studied very less. The present report describes an instance of partial leucism in a Greater Coucal (Centropus sinensis) from Chhattisgarh, India. This colour aberration in this species was first documented in 1990. More research is needed to determine the exact reasons for the high incidence of partial leucism in wild birds, which might include nutrition, lifespan, behaviour, parasitism, or other environmental factors.

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Monish, Kumar Thapa, Kalita Ritu, and Jyoti Das Hirak. "First record of brown colour aberration in Red-Vented Bulbul from Assam." Zoo's Print 38, no. 9 (2023): 35–36. https://doi.org/10.5281/zenodo.8367013.

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Ashwin, C.P, M.S Arjun, and Joy Angel. "Plumage aberration observation in House Crow (Corvussplendens) in Coimbatore district of Tamil Nadu, India." Biolife 10, no. 1 (2022): 1–2. https://doi.org/10.5281/zenodo.7407989.

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ABSTRACT Plumage anomalies in birds are more prevalent in India, where numerous studies have lately been published. We show an instance of brown plumage aberration in a Common House Crow (Corvussplendens) in this report. The plumage of the Common House Crow has been documented in a variety of morphs, the majority of which are examples of lucistic and other aberrations. However, the brown aberration observed by us was unusual and has been discussed. Key words:Plumage, brown, aberration, morphs, lucistic REFERENCES Arockianathan, Samson & Princy, J., 2020. A record on colour aberration in Fulvous-breasted Woodpecker in, Himachal Pradesh, India. Zoos' Print Journal 35: 42-44. Dharmakumarsinhji, R. S., 1975. A Whiteheaded duck. Newsletter for Birdwatchers 15(1): 9. Flood, R. L., & Van Grouw, H., 2015. Unfamiliar plumage types of Fulmars in the North Atlantic. Brit. Birds 108: 331-348. Forrest, S. C., & Naveen, R., 2000. Prevalence of leucism in pygocelid penguins of the Antarctic peninsula. Waterbirds, 283-285. Frainer, G., Daudt, N. W., & Carlos, C. J., 2015. Aberrantly plumaged White-chinned Petrels Procellaria aequinoctialis in the Brazilian waters, south-west Atlantic Ocean. Marine Biodiversity Records, 8. Hume, J. P., & van Grouw, H., 2014. Colour aberrations in extinct and endangered birds. Kale, T., 2006. White Crow on the bank of Ujani Dam. ‘Loksatta’ News Paper, Pune edition, 9 September 2006. Mahabal, A. N. I. L., Sharma, R. M., & Sayyed, A. M. I. T., 2015. Colour aberrations in Indian birds. Birding Asia 24: 19-121. Swapna Gurrapu and Estari Mamidala. In vitro HIV-Reverse Transcriptase Inhibition of Andrographolide Isolatedfrom Andrographis Paniculata. European Journal of Biomedical and Pharmaceutical Sciences. 2017. Volume 4, Issue 12. 516-522. Mancini, P. L., Jiménez, S., Neves, T., & Bugoni, L., 2010. Records of leucism in albatrosses and petrels (Procellariiformes) in the South Atlantic Ocean. Revista Brasileira de Ornitologia 18(3): 245-248. Owen, M., & Skimmings, P., 1992. The occurrence and performance of leucistic Barnacle Geese Branta leucopsis. Ibis 134(1): 22-26. Parasharya, B.M., Chauhan, R.B. and Sukhadia, A.G., 1996. A white coot at Kanewal, Gujarat. Journal-Bombay Natural History Society 93: 586-586. Petry, M. V., Corrêa, L. L. C., Benemann, V. R. F., & Werle, G. B., 2017. Brown plumage aberration records in Kelp Gull (Larus dominicanus) and Magellanic Penguin (Spheniscus magellanicus) in southern Brazil. Revista Brasileira de ornitologia 25(2): 125-127. Roy, A., 2010. AVES-7 Sighting of a rare dark morph of Grey Francolin Francolinus pondicerianus Gmelin 1789 near Surendranagar, Gujarat, India. Journal of the Bombay Natural History Society 107(3): 249. Ryall, C., 2016. Further records and updates of range expansion in House Crow Corvus splendens. Bull BOC 136: 39-45. Sage, B. L., 1963. The incidence of albinism and melanism in British birds. British birds 56(11): 409-416. Urcola, M. R., 2011. Aberraciones cromáticas en aves de la colección ornitológica del Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”. Revista del Museo Argentino de Ciencias Naturales 13(2): 221-228. Van Grouw, H., 2006. Not every white bird is an albino: sense and nonsense about colour aberrations in birds. Dutch Birding 28(2): 79-89. Van Grouw, H., 2012. What colour is that sparrow? A case study: colour aberrations in the house sparrow Passer domesticus. Van Grouw, H., 2013. What colour is that bird. British birds 106: 17-29. Van Grouw, H., 2018. White feathers in black birds. Van Grouw, H., Russell, S., & Merne, O. J., 2011. Notes on colour aberrations in Common Guillemot Uria aalge and Northern Gannet Morus bassanus. Seabird 24: 33-41.

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Rabbe, M. F., M. M. Alam, M. F. Jaman, M. S. Hossain, K. N. M. Sarafat, and A. R. Shome. "Chromatic leucism in the flap shell turtle, Lissemys punctata from Bangladesh." Taprobanica 10, no. 2 (2021): 131. http://dx.doi.org/10.47605/tapro.v10i2.264.

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The spotted flap shell turtle, Lissemys punctata (Bonnaterre, 1789) has a distribution in Bangladesh, India, Myanmar, Nepal and Pakistan. In Bangladesh, this species is widely distributed throughout the freshwater wetlands and the low-lying floodplains, coastal islands, and hill districts. This species is listed in CITES (Appendix II) and protected by Bangladesh Wildlife Conservation & Security Act 2012 (Schedule II), where commercial trade is strictly prohibited. Lissemys punctata has an oval and domed carapace with olive-green colour spotted by dark yellow blotches. The head is also olive green often with yellow blotches, whereas the plastron is whitish or pale yellow. The colour of this species may vary depending on its habitat and defence strategy. Colour aberration in animals may occur due to a lack of melanin. Golden yellow colour aberration (chromatic leucism) is rare in animals, especially in turtles. This might be because of the absence of melanin in the outer dermis. The presence of high xanthophores and yellow pteridine pigments in the skin are also responsible for the golden yellow colour aberration.

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Faubert, Jocelyn, Lynda Bilodeau, and Pierre Simonet. "Transverse chromatic aberration and colour-defined motion." Ophthalmic and Physiological Optics 20, no. 4 (2000): 274–80. http://dx.doi.org/10.1046/j.1475-1313.2000.00532.x.

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Faubert, J. "Transverse chromatic aberration and colour-defined motion." Ophthalmic and Physiological Optics 20, no. 4 (2000): 274–80. http://dx.doi.org/10.1016/s0275-5408(99)00096-4.

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Hodych, J. P. "A large convex lens can provide stereoscopic views of maps colour coded in spectral order." Canadian Journal of Earth Sciences 22, no. 12 (1985): 1877–80. http://dx.doi.org/10.1139/e85-199.

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Geophysical maps are often colour coded in spectral order, that is, with violet, blue, green, yellow, orange, and red representing successively higher values of the mapped data. Viewing such maps with both eyes through a large convex lens can aid interpretation by making the colours appear to lie at successively higher levels in spectral order: red appears highest above the map plane and violet lowest. This colour stereoscopy (induced by chromatic aberration in the lens) will be in spectral order if saturated colours are separated by black contours. However, white separating uniform, saturated colours causes green to appear highest, with blue, red, and then yellow below. Fortunately, an overlay of fine black dots can restore spectral order to lens-induced colour stereoscopy in maps lacking black contours. Hence, I recommend that colour-coded maps use spectral order with red representing the highest values of mapped data and that an array of just visible black dots be printed over the colours if black contours are absent. Then viewing through a large magnifying glass will provide effortless perception of the map's implied third dimension.

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Qian, Jiayuan, Haitao Li, and Tianjian Li. "Comparative Study of Multi-Objective and Single-Objective Optimisation of Colour Matching for Opaque Products." Highlights in Business, Economics and Management 25 (January 20, 2024): 91–97. http://dx.doi.org/10.54097/qge9kr66.

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Opaque products usually refer to all types of products with opaque packaging. In order to improve the market competitiveness of opaque products, it is crucial to determine the optimal colour scheme for the products. In this paper, we study the colour matching scheme for opaque products, taking different concentrations of red, yellow and blue dye as the research variables, taking the minimum chromatic aberration, the lowest cost, and the type of dye as the objective function, establishing the mathematical model of the optimal colour matching scheme, adopting the single-objective particle swarm algorithm and multi-objective hierarchical sequential method respectively, and using specific examples to carry out a comparative analysis to check the two methods. The results show that the single-objective method can provide the colour matching scheme with the minimum chromatic aberration from the ideal colour, and the multi-objective method can consider the cost and price of dyes as well as the types of dyes to provide a more scientific colour matching scheme. The computational results also verify the validity of the model and show that the model can provide decision-making and support for colour matching schemes for opaque products.

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Gayen, Debayan, Subhajit Roy, Sagar Adhurya, Aniruddha Singhamahapatra, Somapika Seal, and Avik Dutta. "“Leucism resulting in xanthochroism” – A report on colour aberration in Coppersmith Barbet Psilopogon haemacephalus from Asia." Ornis Hungarica 30, no. 1 (2022): 69–79. http://dx.doi.org/10.2478/orhu-2022-0005.

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Abstract Plumage colouration is important for birds as it helps them in camouflage, mate selection, social signalling and various other physiological and behavioural processes. The most common pigments responsible for colouration are melanins and carotenoids. In a few individuals, colouration is disrupted due to various causes. The most common colour aberrations found in birds are leucism, albinism, melanism, carotenism, schizochroism and dilution whereas xanthochroism is a lesser-known phenomenon. In this article, five records of colour aberrant Coppersmith Barbet Psilopogon haemocephalus are reported. The authors along with the help of citizen scientists observed four individuals with disruptions in plumage colouration from different areas of West Bengal and Assam, India and one from Rajsahi, Bangladesh. Due to the lack of melanins, the birds were mostly yellowish and whitish in colouration with or without some normally coloured feathers on the head and wings. The carotenoid deposition was unaffected in the case of the observed adults and juveniles. These records can be cited as xanthochroistic individuals resulting from leucism. This is the first record of such colour aberration for Coppersmith Barbet from the whole of its distribution range.

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Juáres, Mariana A., Javier Negrete, Jorge A. Mennucci, Lucrecia Longarzo, and Néstor R. Coria. "“Ino” colour aberration in gentoo penguin (Pygoscelis papua) in Antarctica." Notornis 58, no. 3-4 (2011): 169. https://doi.org/10.63172//814605vwbdwj.

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Arockianathan SAMSON, Das Chandrasekar, Nizamudheen Moinudheen, Jabamalainathan Leona Princy, and Jesudass Beulah Bah. "A Melanistic Jungle Cat (Felis chaus) in the Great Rann of Kutch, Gujarat, India." Mammalogy Notes 10, no. 1 (2024): 367. http://dx.doi.org/10.47603/mano.v10n1.367.

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On 28th January 2023 at 02:30 PM first author (PC) recorded and photographed the completely black in colour cat species during the jungle safari in the Great Rann of Kutch, Gujarat, India. Based on the photographic evidence we identified the species as Jungle cat (Felis chaus), which was affected by melanism. In this note, we highlighted the importance of color aberration on wild animals in their natural habitats. This is necessary for a better understanding of this phenomenon and its insights into the ecological and physiological implications of this condition considerably affecting animal survival.

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Lambert, G., F. Tissandier, J. Gautier, et al. "Aberration-free high-harmonic source generated with a two-colour field." EPL (Europhysics Letters) 89, no. 2 (2010): 24001. http://dx.doi.org/10.1209/0295-5075/89/24001.

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Winn, Barry, Arthur Bradley, Niall C. Strang, Paul V. Mcgraw, and Larry N. Thibos. "Reversals of the colour-depth illusion explained by ocular chromatic aberration." Vision Research 35, no. 19 (1995): 2675–84. http://dx.doi.org/10.1016/0042-6989(95)00035-x.

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Rambhau Deokar, Atul. "REPORT ON COLOUR ABERRATION FOUND IN WILD ANIMALS AT PENCH TIGER RESERVE, MAHARASHTRA, INDIA." International Journal of Advanced Research 10, no. 05 (2022): 25–27. http://dx.doi.org/10.21474/ijar01/14672.

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Pench Tiger reserve, Nagpur, Maharashtra is 25th Tiger reserve of India, located in central Indian landscape and spreads over 741.41 sq. Km. There are 71 mammal species reported by Zoological Survey of India (ZSI, 2004).The colour coat of animals is general character in morphological features to identify the animals. But sometimes colour variation is observed in wild animals due to variation in melanin pigment concentration cause of various reasons. There are six different terms as per morphological variations found in wild animals as Albinism, Leucism, Piebaldism, Melanism, Hypomelanism and Blue eyed morph (Mahabal, 2019). Out of these, there are three variations as Leucism, Piebaldism, Melanismfound in Pench tiger reserve, Maharashtra in Sambar& Spotted deer.

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Jawad, L. A. "First record of blind-side hypermelanosis in a wild brill, Colistium guntheri (Hutton, 1873) (Pisces: Pleuronectidae), collected from Manukau Harbor, Auckland, New Zealand." Marine and Freshwater Research 68, no. 11 (2017): 2170. http://dx.doi.org/10.1071/mf17032.

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Partial hypermelanosis was observed on the blind side of one specimen of wild brill (Colistium guntheri) with a total length of 330mm, collected from Manukau Harbour, south of Auckland City, New Zealand. This is the first record of brill blind-side hypermelanosis from New Zealand waters. The specimen showed broad melanic patches running mainly at the base of the dorsal and anal fins. Causes for such colour aberration are discussed.

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WU, H. S., J. MURRAY, S. MORGELLO, et al. "Restoration of distorted colour microscopic images from transverse chromatic aberration of imperfect lenses." Journal of Microscopy 241, no. 2 (2010): 125–31. http://dx.doi.org/10.1111/j.1365-2818.2010.03443.x.

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Zhang, Z. H., C. E. Towers, and D. P. Towers. "Compensating lateral chromatic aberration of a colour fringe projection system for shape metrology." Optics and Lasers in Engineering 48, no. 2 (2010): 159–65. http://dx.doi.org/10.1016/j.optlaseng.2009.04.010.

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Zhang, Min, Yun-hua Zhou, Shaojin Wang, and Juming Tang. "Effects of thermal treatment on colour and texture of Typha latifolia L." International Agrophysics 26, no. 2 (2012): 153–58. http://dx.doi.org/10.2478/v10247-012-0022-x.

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Effects of thermal treatment on colour and texture of Typha latifolia L. Through the analysis of the residual activity of peroxidase (POD), chromatic aberration, shear intensity and shear power, the effects of different thermal treatment times at 100°C on the POD, surface colour and texture of Typha latifolia L. were evaluated. The results showed that the activity of POD decreased with the increasing thermal treatment time at 100°C. The regeneration amount of POD increased first for some time and then started to decrease with the treatment time. Thermal treatment times 1.0 and 1.5 min at 100°C exhibited maximum regeneration of POD for the samples stored at 20 and 37°C, respectively. The sample had acceptable texture and surface colour when they were treated at 100°C for 4 min because the POD in the sample was inactivated to an acceptable level.

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Wenzl, Elfriede, Matthias G. Wirtitsch, and Navid Ardjomand. "Yellow Intraocular Lenses – To Block or Not to Block." European Ophthalmic Review 03, no. 02 (2009): 77. http://dx.doi.org/10.17925/eor.2009.03.02.77.

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Yellow filters for the eye have been of interest to ophthalmologists and optometrists for the last 30 years. Certain fish species can change the colour of the cornea in response to the level of illumination and regulate the amount of short-wavelength light reaching the retina. A positive influence of yellow eye filters on reduction of chromatic aberration has been found in a fish eye model. Blue-light-filter (yellow) intraocular lenses (IOLs) were introduced for cataract surgery almost 20 years ago. The main advantage of yellow IOLs is thought to be the reduction of chromatic aberration under photopic conditions and protection of the retina from phototoxic short-wavelength light, especially in eyes at risk of age-related macular degeneration (AMD). This article highlights the importance of yellow IOLs for cataract surgery in terms of quality of vision and AMD protection.

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Rivera-Ortega, Uriel. "Simple, innovative and attractive approach for geometrical optics, chromatic aberration and colour combination experiments." Physics Education 59, no. 6 (2024): 065016. http://dx.doi.org/10.1088/1361-6552/ad7a48.

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Abstract The laws of reflection and refraction and therefore the basic concepts of image formation with lenses are some topics that geometric optics deals with. Therefore, in this manuscript, laboratory practices are proposed that will cover concepts of geometric optics using both technological tools and everyday materials that allow the undergraduate or graduate student to obtain these concepts leaving the classical way in which they are usually addressed in classrooms or laboratories. Activities are also proposed that demonstrate phenomena such as chromatic aberration and the combination of red, green and blue (RGB) colours. For this purpose, electronic devices such as a Raspberry-pi (with a sense HAT module), a commercial programmable LED matrix, a hollow Christmas spheres, etc, will be used; giving a novel approach and allowing the use of new motivating technologies for both students and/or educators.

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Jiang, Ming Ming, Zhu Long, Qian Fu, Hui Zhang, and Cui Hua Dong. "Application of Environment-Friendly Insoluble Azo Dyes on Anti-Counterfeiting Paper." Applied Mechanics and Materials 80-81 (July 2011): 355–59. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.355.

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How to used non-EU-banned insoluble azo dyes to prepare a new-type colour-display anti-counterfeiting paper(ACP) is investigated in this paper. The ACP will display red spots when it is wiped with alcohol. Through studying its mainly affecting facts ,including the dosage of Naphthol AS-BO ,dosage of Chromophore Red-B, the Chromophore's pH value and the drying temperature etc.,the best optimize technological conditions are obtained of insoluble azo dyes' color-displaying on the paper for the purpose of anti-counterfeiting. After the red spot are displayed in the paper,the chromatic aberration and physical properties of the paper are detected. The results showed that the paper made by adding Chromophore Red-B and Naphthol AS-BO had a very good anti-counterfeiting effect, while its physical properties had only changed a little.

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Al-Sheikhly, Omar F., Mukhtar K. Haba, Nadheer A. Faza’a, and Ra’ad H. Al-Asady. "First record of colour aberration in Basra Reed Warbler Acrocephalus griseldis (Hartlaub, 1891) (Passeriformes: Acrocephalidae) from Central Marshes of southern Iraq, with notes on its intraspecific/interspecific behavior." Journal of Threatened Taxa 10, no. 13 (2018): 12800–12804. http://dx.doi.org/10.11609/jott.4353.10.13.12800-12804.

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Pigment disorders such as albinism, leucism and progressive greying, which cause the absence of melanin pigments in all or parts of the plumage and bare parts, have been reported in many wild bird populations including Acrocephalus warblers. Basra Reed Warbler Acrocephalus griseldis (Hartlaub, 1891) is a restricted-range species confined to the extensive reed beds of Mesopotamian marshes. It is listed as Endangered due to breeding habitat degradation, water scarcity and climate change. In April 2018, a partly white plumaged Basra Reed Warbler was sighted in Central Marshes in southern Iraq. This is the first report of such a plumage aberration in this species. The nature of the aberration involved an intraspecific/interspecific behavior of the white plumaged Basra Reed Warbler are described.

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Van Grouw, H., and D. Bloch. "History of the extant museum specimens of the Faroese white-speckled raven." Archives of Natural History 42, no. 1 (2015): 23–38. http://dx.doi.org/10.3366/anh.2015.0276.

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The white-speckled raven, a colour aberration of the Faroese raven Corvus corax varius Brünnich, 1764 , has occurred on the Faroe Islands since at least the Middle Ages, and was always prized by collectors. In the second half of the nineteenth century while the Faroese raven population as a whole was suffering intense persecution, pied individuals were even more severely hunted, and were extinct by the beginning of the twentieth century. Details of twenty six specimens found in museum collections are given in this paper, as well as an overview of collectors on the Faroes who may have collected specimens.

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Lawrence, Kirsty Josephine, Martin Scholze, Jose Seixo, et al. "M-FISH evaluation of chromosome aberrations to examine for historical exposure to ionising radiation due to participation at British nuclear test sites." Journal of Radiological Protection 44, no. 1 (2024): 011501. http://dx.doi.org/10.1088/1361-6498/ad1743.

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Abstract Veterans of the British nuclear testing programme represent a population of ex-military personnel who had the potential to be exposed to ionising radiation through their participation at nuclear testing sites in the 1950s and 1960s. In the intervening years, members of this population have raised concerns about the status of their health and that of their descendants, as a consequence. Radiation dose estimates based on film badge measurements of external dose recorded at the time of the tests suggest any exposure to be limited for the majority of personnel, however, only ∼20% of personnel were monitored and no measurement for internalised exposure are on record. Here, to in-part address families concerns, we assay for chromosomal evidence of historical radiation exposure in a group of aged nuclear test (NT) veterans, using multiplex in situ hybridisation (M-FISH), for comparison with a matched group of veterans who were not present at NT sites. In total, we analysed 9379 and 7698 metaphase cells using M-FISH (24-colour karyotyping) from 48 NT and 38 control veteran samples, representing veteran servicemen from the army, Royal Airforce and Royal Navy. We observed stable and unstable simple- and complex-type chromosome aberrations in both NT and control veterans’ samples, however find no significant difference in yield of any chromosome aberration type between the two cohorts. We do observe higher average frequencies of complex chromosome aberrations in a very small subset of veterans previously identified as having a higher potential for radiation exposure, which may be indicative of internalised contamination to long-lived radionuclides from radiation fallout. By utilising recently published whole genome sequence analysis data of a sub-set of the same family groups, we examined for but found no relationship between paternal chromosome aberration burden, germline mutation frequency and self-reported concerns of adverse health in family members, suggesting that the previously reported health issues by participants in this study are unlikely to be associated with historical radiation exposure. We did observe a small number of families, representing both control and NT cohorts, showing a relationship between paternal chromosome aberrations and germline mutation sub-types which should be explored in future studies. In conclusion, we find no cytogenetic evidence of historical radiation exposure in the cohort of nuclear veterans sampled here, offering reassurance that attendance at NTs sites by the veterans sampled here, was not associated with significant levels of exposure to radiation.

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Pirard, E. "Multispectral imaging of ore minerals in optical microscopy." Mineralogical Magazine 68, no. 2 (2004): 323–33. http://dx.doi.org/10.1180/0026461046820189.

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AbstractMultispectral imaging of ore minerals under the microscope is a logical extension of quantitative colour analysis and microspectrophotometric analysis of minerals. This paper describes, step by step, how the proper calibration of a scientific video camera can be performed in order to obtain precise reflectance measurements at each pixel within the field of view. After having reviewed the different sources of noise and aberration, practical formulae are presented that allow for the acquisition of a set of images at different wavelengths in the visible spectrum.The advantage of using a multispectral image acquisition system based on narrow bandwidth (10 nm) interference filters is discussed and quantitatively compared to colour imaging using tristimulus (red, green, blue) filters.Images taken from major sulphide parageneses are shown as examples of well contrasted multispectral images. Finally, the potential for automatic identification of ore minerals is discussed with reference to supervised multivariate image classification algorithms similar to those used in remote sensing. Additional comments on extending the principles for handling optical anisotropy and developing a multiradial imaging system are made.

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Obermann, E. C., M. Csato, S. Dirnhofer, and A. Tzankov. "BCL2 gene aberration as an IPI-independent marker for poor outcome in non-germinal-centre diffuse large B cell lymphoma." Journal of Clinical Pathology 62, no. 10 (2009): 903–7. http://dx.doi.org/10.1136/jcp.2009.066597.

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Aim:Diffuse large B cell lymphoma (DLBCL) is the most common lymphoid malignancy in the western hemisphere, and is characterised by a highly variable outcome that impedes individual risk assessment. Lacking reliable biomarkers, the international prognostic index (IPI) has been the most reliable factor to predict survival and stratify patients for therapy. The aim of this study was to investigate the frequency and potential prognostic role of BCL2 aberrations on the chromosomal level and the protein level in a large DLBCL collective.Methods:Fluorescence in situ hybridisation (FISH) with commercially available dual-colour break-apart probes and immunohistochemistry were used to assess BCL2 gene abnormalities and bcl2 protein expression on validated tissue microarrays containing 224 well-characterised cases of primary DLBCL.Results:FISH analysis of BCL2 revealed a break in 40/215 cases (19%) and a gain in 66/171 (39%) cases. Only BCL2 gains correlated with bcl2 protein expression (p = 0.001). Presence of any BCL2 gene abnormality, particularly gains, correlated independently of the IPI with a significantly worse prognosis in DLBCL of non-germinal centre (non-GC) phenotype as opposed to DLBCL of non-GC type without this genetic alteration (p = 0.003). DLBCL of germinal centre phenotype did not show this association.Conclusions:Cases of DLBCL of the non-GC type with BCL2 gene aberration are accompanied by a significantly worse prognosis as opposed to cases without such gene abnormalities. It may be helpful to asses BCL2 gene abnormalities by FISH in addition to assessing established parameters for individual risk estimation in DLBCL.

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Reshidko, Dmitry, Masatsugu Nakanato, and José Sasián. "Ray Tracing Methods for Correcting Chromatic Aberrations in Imaging Systems." International Journal of Optics 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/351584.

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The correction of chromatic aberrations is typically performed using aberration formulas or by using real ray tracing. While the use of aberration formulas might be effective for some simple optical systems, it has limitations for complex and fast systems. For this reason chromatic aberration correction is usually accomplished with real ray tracing. However, existing optimization tools in lens design software typically mix the correction of monochromatic and chromatic aberrations by construction of an error function that minimizes both aberrations at the same time. This mixing makes the correction of one aberration type dependent on the correction of the other aberration type. We show two methods to separate the chromatic aberrations correction of a lens system. In the first method we use forward and reverse ray tracing and fictitious nondispersive glasses, to cancel the monochromatic aberration content and allow the ray tracing optimization to focus mainly on the color correction. On the second method we provide the algorithm for an error function that separates aberrations. Furthermore, we also demonstrate how these ray tracing methods can be applied to athermalize an optical system. We are unaware that these simple but effective methods have been already discussed in detail by other authors.

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Cobb, S. R. "On a Possible Contribution to the Colour Sense by the Blur Circles on the Human Retina Caused by Chromatic Aberration." Perceptual and Motor Skills 72, no. 3_suppl (1991): 1222. http://dx.doi.org/10.2466/pms.1991.72.3c.1222.

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TANAKA, K. "Chromosome aberration analysis in atomic bomb survivors and Thorotrast patients using two- and three-colour chromosome painting of chromosomal subsets." International Journal of Radiation Biology 70, no. 1 (1996): 95–108. http://dx.doi.org/10.1080/095530096145373.

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Clarke, Ted. "Chromatic Aberration in Digital Photomicrographs from Microscopes Requiring Compensating Eyepieces." Microscopy Today 12, no. 4 (2004): 34–37. http://dx.doi.org/10.1017/s155192950005481x.

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Chromatic aberrations are defects in an imaging system caused by the fact that different wavelengths or colors of light are refracted by different amounts. There are two types of chromatic aberration: longitudinal and lateral. Longitudinal Chromatic Aberration arises when a lens fails to focus various colors sharply in the same plane. If white light is used, the resulting image will be unsharp due to the different focal points of its component colors. Some colors will be in focus (and therefore sharp) and other colors will be out of focus. Lateral Chromatic Aberration results in a lateral shift of the different color components of an image as a single lens with a fixed refractive index will disperse each color by different amounts. This results in color stripes at slightly different magnifications, much like a rainbow, around hard edges and a general softening or decrease in resolution in all areas.

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Kröber, Alexander, Dirk Kienle, Dirk Winkler, et al. "ZAP-70 Expression, VH-Mutation Status, Genomic Aberrations and Prognosis in Chronic Lymphocytic Leukemia." Blood 104, no. 11 (2004): 1920. http://dx.doi.org/10.1182/blood.v104.11.1920.1920.

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Abstract The VH status is a strong prognostic marker in chronic lymphocytic leukemia (CLL). ZAP-70, a zeta associated tyrosine kinase physiologically expressed by T-cells, is overexpressed in VH unmutated CLL and could therefore serve as a surrogate marker for the VH status. We analyzed ZAP-70 expression (n=96), the VH status (n=75) and genomic aberrations (n=84) in a single center CLL cohort to study associations among these parameters and to assess their relative prognostic value. ZAP-70 expression was measured by 4-colour flow cytometry (CD5, CD19, CD3/56, ZAP-70) applying an unconjugated anti-ZAP-70-antibody (Upstate, clone 2F3.2) according to Crespo et al., NEJM 2003. ZAP-70 expression was positive (cut-off 20%) in 67% and negative in 33% of cases. VH was mutated in 33% and unmutated in 67% of cases. Unfavorable genomic aberrations (17p−, 11q−) were more frequently observed in cases with unmutated VH (46 vs. 9%) and in ZAP-70 positive cases (39 vs. 20%), while favorable genomic aberrations (13q− as single aberration) occurred more frequently in VH mutated (48 vs. 17%) and ZAP-70 negative subgroups (50 vs. 18%). ZAP-70 expression predicted the VH status in 84% of cases. At a median follow up time of 47 months (m), the median treatment free survival (TFS) of ZAP-70 positive and negative cases was 31 and 86 m (p=.057). The median TFS of the VH unmutated and VH mutated subgroups were 24 and 172 m (p<.001). Within the follow up time 10 deaths occurred. Of these, 8 cases exhibited high ZAP-70 expression and an unmutated VH, whereas 2 cases showed discordant results. Overall, discordant results for ZAP-70 expression and VH status were identified in 12 cases (ZAP-70 positive/VH mutated, 8 cases; ZAP-70 negative/VH unmutated, 4 cases). Of the 8 VH mutated cases with high ZAP-70 expression, only 1 case exhibited unfavorable genomic aberrations, 4 remained in stable disease, 4 developed progressive disease, 3 patients required therapy, and 1 of these 3 died within follow up time. Two of the 3 patients who required therapy, including the patient who died, showed a mutated V3-21 gene rearrangement, associated with an unfavorable outcome. Among the 4 cases with an unmutated VH and low ZAP-70 expression, 2 cases exhibited unfavorable genomic aberrations, 3 cases required therapy, 1 of these 3 died, and for one patient no clinical data were available. In summary, the imbalanced distribution of high risk genomic aberrations was similar when comparing the subgroups according to ZAP-70 expression and VH status. In our series an unmutated VH status predicted for shorter TFS, whereas high ZAP-70 expression did not reach significance. ZAP-70 expression was associated with unmutated VH, but a substantial number of cases showed discordant results for ZAP-70 expression and VH status. The pattern of genomic aberrations and the clinical course of the discordant cases were typical for their respective VH status. Compared to ZAP-70 expression the VH status appeared to be more informative in the prediction of the clinical course in our series of CLL patients.

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Luo, Zhenyi, Yannanqi Li, John Semmen, Yi Rao, and Shin-Tson Wu. "75‐3: Achromatic Liquid‐Crystal Lens for Near‐Eye Displays." SID Symposium Digest of Technical Papers 55, no. 1 (2024): 1034–37. http://dx.doi.org/10.1002/sdtp.17713.

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Liquid‐crystal optics is a promising optical element for near‐eye display as it provides an ultrathin formfactor and lightweight. However, its severe chromatic aberrations impose a big challenge for full‐color display applications. In this study, we demonstrate an achromatic diffractive liquid‐crystal device to overcome this longstanding chromatic aberration issue.

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Shrestha, Pawan K., Matt J. Pryn, Jia Jia, et al. "Accommodation-Free Head Mounted Display with Comfortable 3D Perception and an Enlarged Eye-box." Research 2019 (August 25, 2019): 1–9. http://dx.doi.org/10.34133/2019/9273723.

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An accommodation-free displays, also known as Maxwellian displays, keep the displayed image sharp regardless of the viewer’s focal distance. However, they typically suffer from a small eye-box and limited effective field of view (FOV) which requires careful alignment before a viewer can see the image. This paper presents a high-quality accommodation-free head mounted display (aHMD) based on pixel beam scanning for direct image forming on retina. It has an enlarged eye-box and FOV for easy viewing by replicating the viewing points with an array of beam splitters. A prototype aHMD is built using this concept, which shows high definition, low colour aberration 3D augmented reality (AR) images with an FOV of 36°. The advantage of the proposed design over other head mounted display (HMD) architectures is that, due to the narrow, collimated pixel beams, the high image quality is unaffected by changes in eye accommodation, and the approach to enlarge the eye-box is scalable. Most importantly, such an aHMD can deliver realistic three-dimensional (3D) viewing perception with no vergence-accommodation conflict (VAC). It is found that viewing the accommodation-free 3D images with the aHMD presented in this work is comfortable for viewers and does not cause the nausea or eyestrain side effects commonly associated with conventional stereoscopic 3D or HMD displays, even for all day use.

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Gong, Yuhong, Jun Li, Jinwei Li, Liuping Fan та Li Wang. "Influence of Ultrasound-Assisted Vacuum Drying on Physicochemical Characteristics, Antioxidant Activity, and α-Glucosidase Inhibition Activity of Flos Sophorae Immaturus". Foods 12, № 3 (2023): 671. http://dx.doi.org/10.3390/foods12030671.

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Flos Sophorae Immaturus (FSI) contains a large number of bioactive substances with antioxidant and hypoglycaemic activity. However, a feasible drying process plays an important role in the retention of its biological activity. The present work investigated the effects of ultrasound-assisted vacuum drying (UAVD) on FSI samples in terms of drying time, colour, microstructure, and total flavonoid content (TFC). Meanwhile, the antioxidant activity and α-glucosidase inhibition activity were also evaluated. The results show that the drying time of UVAD samples was decreased by 40% compared to that of the single vacuum-dried (VD) samples (600 W for 10 min). The cellular porous structures of FSI tissue were formed by UAVD, which promoted the migration of water from the inside to the outside. Furthermore, samples treated by UAVD exhibited better antioxidant activities and α-glucosidase and α-amylase inhibition capacities, with DPPH (81.86%), ABTS (88.61%), FRAP (83.05%), α-glucosidase inhibition capacity (89%), α-amylase (85%), drying time (3 h), and total aberration (ΔE) (1.63) being the highest characteristic traits. In this condition, the highest levels of total flavonoid content (TFC), rutin, quercetin, kaempferol, isorhamnetin, and genistein were obtained with 266.94, 239.46, 35.56, 8.54, 10.37, and 5.64 mg/g DW, respectively. The results confirm that UAVD is a novel method that significantly reduced the VD time and promoted the release of the bioactive substances of FSI.

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Bethencourt de León, Nauzet, Paula Sola La Serna, and Jorge Sánchez-Capuchino Revuelta. "Revolutioning Lens-Based Systems Design: Showcasing the power of OptiMat." EPJ Web of Conferences 309 (2024): 03020. http://dx.doi.org/10.1051/epjconf/202430903020.

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OptiMat, by Sagittal Optics, is a tool developed to generate spherical designs for color-corrected lens-based systems. OptiMat analytically achieves optimum optical materials selection, key to correcting chromatic aberration. However, this tool extends beyond material selection; it is also used to establish initial systems in the design process, which optical designers can further refine. By selecting from a catalog of materials and specifying the number of lenses in the system, optical designers receive ideal assemblies correcting chromaticity, spherical and field aberrations, together with a set of parameters to further improve the provided systems. Additionally, engineers can filter combinations based on different metrics, such as chromatic and monochromatic aberrations. By handling material selection and lens shaping at the project's outset, OptiMat significantly streamlines optical system design times.

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Emerling, Christopher A., Hieu T. Huynh, Minh A. Nguyen, Robert W. Meredith, and Mark S. Springer. "Spectral shifts of mammalian ultraviolet-sensitive pigments (short wavelength-sensitive opsin 1) are associated with eye length and photic niche evolution." Proceedings of the Royal Society B: Biological Sciences 282, no. 1819 (2015): 20151817. http://dx.doi.org/10.1098/rspb.2015.1817.

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Retinal opsin photopigments initiate mammalian vision when stimulated by light. Most mammals possess a short wavelength-sensitive opsin 1 (SWS1) pigment that is primarily sensitive to either ultraviolet or violet light, leading to variation in colour perception across species. Despite knowledge of both ultraviolet- and violet-sensitive SWS1 classes in mammals for 25 years, the adaptive significance of this variation has not been subjected to hypothesis testing, resulting in minimal understanding of the basis for mammalian SWS1 spectral tuning evolution. Here, we gathered data on SWS1 for 403 mammal species, including novel SWS1 sequences for 97 species. Ancestral sequence reconstructions suggest that the most recent common ancestor of Theria possessed an ultraviolet SWS1 pigment, and that violet-sensitive pigments evolved at least 12 times in mammalian history. We also observed that ultraviolet pigments, previously considered to be a rarity, are common in mammals. We then used phylogenetic comparative methods to test the hypotheses that the evolution of violet-sensitive SWS1 is associated with increased light exposure, extended longevity and longer eye length. We discovered that diurnal mammals and species with longer eyes are more likely to have violet-sensitive pigments and less likely to possess UV-sensitive pigments. We hypothesize that (i) as mammals evolved larger body sizes, they evolved longer eyes, which limited transmittance of ultraviolet light to the retina due to an increase in Rayleigh scattering, and (ii) as mammals began to invade diurnal temporal niches, they evolved lenses with low UV transmittance to reduce chromatic aberration and/or photo-oxidative damage.

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Ma, Jiantao, John M. Hollerbach, and Ian W. Hunter. "Optical Design for a Head-Mounted Display." Presence: Teleoperators and Virtual Environments 2, no. 3 (1993): 185–202. http://dx.doi.org/10.1162/pres.1993.2.3.185.

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This paper presents a design concept for a head-mounted display, incorporating color stereo vision using commercial LCDs and our own optical relay design. The focus here is on the optical system design, which must meet specifications for a wide field of view, size and cost constraints, and aberration minimization based on human factors. Two multispherical lens systems are presented and compared, one a straight structure and the other a folded structure, which satisfy the design constraints. Their aberrations (distortion, coma, lateral color, field curvature, and astigmatism) have been well corrected, according to human perceptual constraints explicitly discussed. Each has a 20-mm eye relief and an instantaneous field of view greater than 60°; the former has an exit pupil of 10 mm and the latter of 8 mm.

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WU Hangyu, 吴航宇, 王铭群 WANG Mingqun, 卢鑫 LU Xin та 方晖 FANG Hui. "模拟退火算法色差校正的傅里叶叠层显微彩色成像技术". ACTA PHOTONICA SINICA 50, № 3 (2021): 10. http://dx.doi.org/10.3788/gzxb20215003.0311002.

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Fan, Lirong, and Lijun Lu. "Calculation of the wave aberration of field curvature and color aberrations of an ultrawide-angle optical system." Optics Communications 479 (January 2021): 126414. http://dx.doi.org/10.1016/j.optcom.2020.126414.

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Ogata, Kiyoyuki, Yoshifumi Kishikawa, Chikako Satoh, Hideto Tamura, Kazuo Dan, and Akio Hayashi. "Diagnostic application of flow cytometric characteristics of CD34+ cells in low-grade myelodysplastic syndromes." Blood 108, no. 3 (2006): 1037–44. http://dx.doi.org/10.1182/blood-2005-12-4916.

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Abstract The diagnosis of myelodysplastic syndromes (MDS) without an increase in blasts and ringed sideroblasts (low-grade MDS without ringed sideroblasts [LGw/oRS]) may be problematic because dysplastic features are not specific to MDS and approximately 50% of patients with LGw/oRS lack chromosomal aberrations. Here, we report the usefulness of flow cytometric characteristics of CD34+ cells for LGw/oRS diagnosis. Bone marrow cells from LGw/oRS patients and controls (eg, cytopenic individuals without MDS) were analyzed using 4-color flow cytometry (FCM). We objectively determined reference ranges of 13 parameters related to CD34+ cells with data from controls. In LGw/oRS patients, various abnormalities of CD34+ cells—eg, decrease in CD34+ B-cell precursors, aberrant expression or overexpression of various antigens on CD34+ myeloblasts—were observed. We constructed a reproducible, flow cytometric scoring system for LGw/oRS diagnosis. High scores were observed in 16 of 27 LGw/oRS patients, regardless of the presence or absence of chromosomal aberrations, but not in any of the 90 controls. Among LGw/oRS patients with chromosomal aberrations, patients with trisomy 8 or del20(q) had low FCM scores (P = .002). As a result, most LGw/oRS patients were identified based on high FCM score, chromosomal aberration, or both.

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Barragan, Carlos Sergio, Silvia B. Hansson, Silvina A. Cicchini, Monica Tamashiro, Pablo G. Dinardo, and David Veron. "Chronic Lymphocytic Leukemia, Detection of Five Significant Prognostic Genomic Aberrations by Interphase Two-Color Fluorescence in Situ Hybridization Analyses: a Study of 24 Patients with Clinical Follow-up Ranged From 7 to 120 Months." Blood 114, no. 22 (2009): 4716. http://dx.doi.org/10.1182/blood.v114.22.4716.4716.

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Abstract Abstract 4716 Background Conventional cytogenetic studies by chromosome banding are difficult in chronic lymphocytic leukemia (CLL) because of the low in vitro proliferation or mitotic activity of CLL cells. Interphase Fluorescence in situ hybridization (FISH) has improved the detection of genomic aberrations in CLL. We used this method to identify chromosomal abnormalities in patients with CLL at diagnosis, progression disease, after relapse or treatment failure. Methods Mononuclear cells from the blood of 24 Caucasian patients, 12 men and 12 women, age ranged from 39 to 84 years (median, 64) with CLL were analyzed by FISH, for deletions in chromosome bands 11q22.3, 6q23.3, 13q14.3, 17p13.1, and trisomy of chromosome 12. The patients stages were 0A:12; IA:1; IIA: 2; IIB:4; IIIA:1, IIIB:1; IIIC:1; IV:2. The follow up ranged was from 7 to 124 months. Results Chromosomal aberrations were detected in 15 of 24 (58.33 percent). The most frequent changes were a 12 trisomy (37.5 percent), a deletion in 11q23.3, (12.5 percent), a deletion in 6q23.3 (8.33 percent), a deletion in 17p13.1 ( 8.33 percent), a deletion in 13q14.3 8.33%. A patient showed four aberrations tri(12), d(17p13.1), d(6q23.3), d(11q23.3), she was resistant to Fludarabine + Cyclophosfamide treatment and Rituximab CHOP and had a survival of 51 months. The other patients with trisomy 12 alone are still alive and the survival were ranged from 7 to 120 month. Trisomy 12 was correlated with enlarged lymph nodes. Two patients undergo Richter transformation one of them with 6q23.3 the other without the aberrations assessed. The patients with deletion 11q23.3 were resistant to standard regimens treatment. Ten patients have stable disease (0A), clinical follow up ranged from 7 to 124 months; three with trisomy 12 the others without the genetic aberrations assesses. Longest survivals (124 month) were found in patients without aberration or with trisomy 12. Patients without aberrations or with trisomy 12 had similar evolution. A female patient, 84 years old state in stage 0A along 13 month with d(17p13.1), and d(11q23.3). Patients with 11q23.3 deletions had the shortest median treatment-free interval (11months), and those with trisomy 12 or deletion 13q14.3 had the longest (124 and 40 months respectively). Patients with 11q23.3 and 6q23.3 deletion had more advanced disease. Two patients died, both of them with 6q23.3, overall survival 51 and 54 months respectively. ZAP 70 and CD38 do not have correlation with presence of the genomic aberration assessed .The present of 11q23.3, 6q23.3, 17p13.1, age, the white-cell count, Rai - Binet stage and the serum lactate dehydrogenase level gave significant prognostic information. Conclusions Genomic aberrations are independent prognosis factors of disease progression and survival in Chronic lymphocytic leukemia; establish them properly will be an important goal standard, therefore incorporate FISH assay routinely could give significant prognostic information. These genetic findings are predictors of outcome treatment regimens and could help to choose the appropriated strategic treatments. Disclosures: No relevant conflicts of interest to declare.

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Tong, Li Ping, Bin Peng, Yi Wei Fei, and Hong Wei Yang. "Application of CIEDE2000 Color Difference Formula in Jet Fuel Silver Strip Corrosion Color Recognition." Key Engineering Materials 531-532 (December 2012): 54–57. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.54.

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In order to eliminate the human eyes’ subjective differences in the level recognition of the jet fuel’s silver corrosion, chromatic aberration system is used to calculate chromatic aberration between the image of the standard colorimetric board and the experiment silver corrosion. By contrast, this paper chooses the least chromatic aberration to estimate the level of silver corrosion. The CIEDE2000 of the color difference formula, which can match with person vision theoretically, is applied in the chromatic aberration system at present, and can reflect the minor differences in color correctly. so this paper attempts to use CIEDE2000 color formula to determine the silver strip corrosion, which can reduce the influence of professionals’ subjective factors, and these results are more objective and accurate, which proves the actual feasibility of this method.

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MA Feng, 马凤, 倪育博 NI Yubo, 孟召宗 MENG Zhaozong та ін. "基于彩色正交条纹的串扰与色差补偿方法". ACTA PHOTONICA SINICA 53, № 8 (2024): 0812002. http://dx.doi.org/10.3788/gzxb20245308.0812002.

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Reyes, Enzo, and Luis Ortiz-Catedral. "FOUR CASES OF DIFFERENT PLUMAGE CHROMATIC ABERRATIONS IN GALAPAGOS BIRDS." Revista Ecuatoriana de Ornitología 9, no. 2 (2023): 131–35. http://dx.doi.org/10.18272/reo.v9i2.2776.

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Plumage chromatic aberrations usually represent a problem for field ornithologists. Chromatic aberrations are originated by genetic mutations that result in a pigment deficiency, drastically altering the typical colour of individuals, and can vary both within and between species. Here, we present four different colour aberrations in four bird species native and endemic to the Galapagos Islands: Lava Gull Leucophaeus fuliginosus, Brown Noddy Anous stolidus, Floreana Mockingbird Mimus trifasciatus, and Small Ground Finch Geospiza fuliginosa. These records expand taxonomically the occurrence of chromatic aberrations on Ecuadorian birds and in the Galapagos archipelago.

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Gorman, Gerard. "Observation of a Middle Spotted Woodpecker Dendrocoptes medius with aberrant, brown-coloured plumage." Ornis Hungarica 32, no. 1 (2024): 231–37. http://dx.doi.org/10.2478/orhu-2024-0017.

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Abstract Birds with atypical colours in their plumage are not uncommon however, the potential causes of such aberrations have not been widely examined. Aberrant brownish-rufous phaeomelanin is one type of plumage colour that has been recorded in numerous bird species, including those which essentially contain only eumelanin (black) pigments, including several European woodpeckers. A Middle Spotted Woodpecker Dendrocoptes medius with aberrant phaeomelanised plumage observed in the Bükk Hills, Hungary, is detailed here and an evaluation of the possible nature of this form of plumage discussed.

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Schenker, Hannah, Lukas Kuhlmann, Dorothee Kaudewitz, et al. "Increased Sensitivity to Ionizing Radiation in a Relevant Subset of Patients with Cancer and Systemic Lupus Erythematosus." Cells 14, no. 8 (2025): 569. https://doi.org/10.3390/cells14080569.

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It has long been hypothesized that systemic lupus erythematosus (SLE) increases radiosensitivity, but recent studies have yielded mixed results. We studied individual radiosensitivity in 70 individuals with SLE using chromosomal aberrations as biomarkers of radiosensitivity. In total, 33 patients with SLE and 37 patients with SLE and additional oncologic diseases were compared with healthy individuals and with patients with rectal and breast cancer. Individual radiosensitivity was assessed by ex vivo irradiation of G0 blood lymphocytes followed by three-color fluorescence in situ hybridization of chromosomes 1, 2, and 4. SLE patients have slightly higher background rates of chromosomal aberrations than healthy individuals and lower rates than cancer patients. Non-oncologic SLE patients show a rate of chromosomal aberrations similar to that seen in healthy individuals. The outliers in this group, who clearly show increased radiosensitivity, fall between healthy individuals and cancer patients. Patients with SLE and cancer have significantly higher chromosome aberration rates compared to healthy individuals (p < 0.001) and patients with isolated cancer (p = 0.007) or isolated SLE (p = 0.004). The proportion of radiosensitive patients in the oncologic SLE cohort is high, with 45% of patients showing increased radiosensitivity. There is a weak association between anti-Ro-52 autoantibodies and radiosensitivity. Based on the radiosensitivity measurement, radiation dose reduction was recommended in 11 oncological SLE patients and was successfully achieved in 5 patients by up to 21% of the dose per fraction. In the oncologic SLE cohort, a substantial portion of individuals show increased radiosensitivity.

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Journal articles on the topic 'Colour aberration'

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