Color Shade Research Articles

Color variation of composite resins in relation to the Vita Classical shade guide

Aim: The aim of this study was to verify the color variation between different composite resins and the Vita Classical Shade Guide. Methods: Two-millimeter thickness samples were made (n = 6) from eight commercial brands of composite resin (shade A2): Charisma (Kulzer), Forma (Ultradent), Harmonize (Kerr), Luna (SDI), Opallis (FGM), Oppus Bulk Fill (FGM), Vittra (FGM) and Filtek Z250 XT (3M ESPE). Specimens were stored in distilled water for 7 days and then polished. Color measurements of samples and A2 shade of the Vita Classical Shade Guide were performed using the Vita Easy Shade Advance 4.0 spectrophotometer on a black background. Color variations were calculated using the CIEDE2000 formula, considering values ≥0.81 being noticeable by the human eye and ≥1.77 being clinically unacceptable. Results were statistically analyzed with a 5% significance level. Results: Color variation (ΔE) of composite (E1 ) compared to the Vita Classical Shade Guide (E0 ) was greater than clinically acceptable for all the materials evaluated in this study. Forma (ΔE=2.08 ± sd=0.47) and Filtek Z250 XT (2.50 ± 0.20) had the smallest amount of color variation values found in the results. Harmonize (3.32 ± 0.63) presented values similar to Filtek Z250 XT, but it was worse than Forma. Vittra (3.51 ± 0.28), Charisma (3.80 ± 0.20), Opallis (4.24 ± 0.30) and Luna (5.67 ± 0.20) did not differ among each other and presented higher color variation than Forma, Filtek Z350XT and Harmonize. Oppus Bulk Fill (13.94 ± 1.12) was the composite with the greatest color variation. Conclusions: The findings in this study show that attention should be taken when using the Vita Color Shade Guide for composite shade selection.

Microwave disinfection of facial silicone prostheses, Part 1: Color stability

The choice of cleaning method is an important consideration for lengthening the serviceable time of facial prostheses as microbial organisms and biofilms could degrade facial prostheses and cause skin irritation. Whether microwave disinfection is a suitable cleaning method without degradation of the properties of a prosthesis is unclear. The purpose of this in vitro study was to measure the color stability of 6 commonly used facial silicone elastomers after microwave disinfection over a simulated 1.5-year period. Six different facial silicone elastomers: MDX4-4210, MDX4-4210/Type A, M511, A-2186, VST-50, and A-2000 were mixed with intrinsic silicone white opacifier (except for the control group) and subsequently combined with 4 silicone intrinsic pigment color groups: red (R), yellow (Y), burnt sienna (B), and a mixture of R+Y+B (M). The control group was a silicone elastomer without opacifier or pigment. Each of the 30 experimental groups consisted of 5 specimens (N=150). Five specimens were placed in a 250-mL Erlenmeyer flask filled with 160mL of tap water. Seven flasks were then placed in a 660-W microwave oven. An exposure of 6 minutes was used according to the antimicrobial efficacy of microwave disinfection protocol on facial silicone prostheses with a final water temperature of 60°C for 18 times (simulating 1.5 years of microwave disinfection with one 6-minute exposure monthly). A spectrophotometer was used to measure reflectance color change values (∆E). Color differences were calculated following CIELab (∆E*ab) and CIEDE2000 (∆E00) formulae. ∆E*ab and ∆E00 were statistically analyzed by a linear mixed effects model with 3 factors (silicone type, color shade, and time) using the R Statistical software program (α=.05). Both ∆E*ab and ∆E00 of all silicone elastomers studied were less than the visual perceptibility thresholds (∆E*ab<1.1 and E00<0.7) and were considered clinically acceptable (∆E*ab<3.0 and E00<2.1) after the 1.5-year simulation of microwave disinfection. Yellow and blue pigments had more effect on MDX4-4210 and M511, while red pigment had more effect on MDX4-4210, MDX4-4210/Type A, and M511 (P<.05). Nevertheless, the values were still below the perceptibility threshold (∆E*ab≤1.0 and E00<0.6). All 6 facial silicone elastomers maintained clinically acceptable color after 18 months of exposure to microwave disinfection.

Providing Active Charging Services: An Assignment Strategy With Profit-Maximizing Heat Maps for Idle Mobile Charging Stations

In Internet of Electric Vehicles (IoEV), mobile charging stations (MCSs) have been deployed to complement fixed charging stations. Typically, MCSs are assigned to charge the electric vehicles with insufficient electricity which have made charging requests (termed IEVs). Moreover, there are some electric vehicles with insufficient electricity which have not made charging requests (termed quasi-IEVs). If idle MCSs are allowed to actively track quasi-IEVs according to their potential charging demand, then more IEVs could be promptly charged, and thus the charging profits of MCSs could be increased. However, due to the private ownership of electric vehicles, some private information cannot be provided in the potential charging demand of quasi-IEVs (e.g., the destinations and residual electricity), making the potential charging profits of idle MCSs hard to be evaluated, and thereby the proper assignments of idle MCSs are difficult to decide. To this end, we introduce the profit-maximizing heat maps to depict the potential charging demand of quasi-IEVs and evaluate the potential charging profits of idle MCSs. A profit-maximizing heat map remarks the positions around quasi-IEVs and displays them as continuous areas. Specifically, the different shades of colours are used to distinguish the quantities of potential charging profits of idle MCSs, and the sizes of coloured areas are used to indicate the possibility of quasi-IEVs passing through these positions. In this paper, we propose a Profit-Maximizing Assignment Strategy of Idle MCSs (PMASIM) to properly assign the idle MCSs to charge IEVs at selected charging positions, or track some quasi-IEVs according to the profit-maximizing heat maps. Extensive simulations and comparisons demonstrate the superior performance of PMASIM, i.e., with the profit-maximizing heat maps, the charging profits of MCSs are increased, and the proportion of charged IEVs is enhanced as well.

3D printed pyrography: Using wood filament and dynamic control of nozzle temperature for embedding shades of color in objects

Colors enhance the esthetic and functional aspects of three-dimensional (3D) printed objects via material extrusion (MEX). However, existing 3D printing techniques require additional materials and hardware that are either challenging to calibrate or too costly for average 3D printing users. This paper presents a fabrication technique we call 3D printed pyrography, which enables printing multiple shades of color and gradients using a wood filament and a single-nozzle extruder. We investigate the effects of printing temperature and speed on the color properties of wood filament (ColorFabb). Using Euclidean distance in CIELAB color space, we employed perceptual metrics to quantify color differences between samples with different print temperatures (minimum: 195°C, maximum: 300°C, and 5°C increment). As a result, we identified all samples had perceivable discrete colors (ΔE ≥ 1), and, by applying a more conservative threshold, we can refine the count to sixteen distinct colors (ΔE ≥ 2.3). This approach underscores the sensitivity of color perception to printing parameters and highlights the utility of ΔE in CIELAB parameters in discerning color differences in 3D printed objects. Furthermore, we encapsulate this information in a custom software interface. This tool allows users to specify shades or map photographic images directly onto 3D surfaces, and generates the G-code that modulates the nozzle temperature and achieves the desired shading. We demonstrate 3D printed pyrography through 11 applications, such as enhancing visual esthetics, offering visual guidance, and embedding markers to merge digital information with physical objects.

VARIATION IN THE ASIP AND DUN GENES RESPONSIBLE FOR COAT COLOUR IN BOSNIAN MOUNTAIN HORSE

Within the Bosnian Mountain Horse Registry (BMH), some specific coat colours are permitted. Accurate determination of coat colours can be challenging as there are variations in coat colour shades and several dun dilution variants occur. The previously found single nucleotide polymorphisms (SNPs) within two coat colour loci, T-box 3 (TBX3) and Agouti Signalling Protein (ASIP), were genotyped in 313 BMH individuals. The obtained genotypes were then compared to the predicted phenotypes by using the observed coat colour types from the International Association of Bosnian Mountain Horse Breeders (IABMHB) database. It was found that the dark bay and black coat colours were the most representative coat colours both phenotypically and genotypically. The frequency of the dominant Dun (D) dilution allele is (0.09), and this frequency is higher than the previously predicted frequency recorded in the available BMH registers, as also demonstrated. Among the identified alleles, there was a discrepancy or inconsistency between the predicted coat colour based on genotypes and the observed coat colour in 73 horses (23%). The most frequent error concerned the misclassification of horses with genotypes aa and Aa at the ASIP gene, non-dun1/non-dun1 (nd1/nd1) and non-dun2/non-dun1 (nd1/nd2) at the TBX3 gene, which can be associated with the occurrence of slight dilution phenotypes in these individuals. In contrast to the Konik and Hucul breeds, no homozygosity of the D allele was found in the BMH. The D allele can be easily overlooked or not recognised in different phenotypic groups, such as dark bay and black horses. Therefore, the hypothesis that Dun dilution effects itself is not as strongly epistatic in the BMH as described in other horse breeds. This could be the result of an additional genetic modifier suppressing the phenotypic effect of the D allele. It also suggests that there has been a persistent selection pressure in favour of dark base colours, which may have contributed to the observed differences in BMH. Finally, a significant proportion (35%) of BMH individuals with genetically black coat colour were officially classified as dark bay. We hypothesise that the difficulty in visually distinguishing these two phenotypes is due to an independent locus upstream of the ASIP gene. This locus was recently identified as a factor that darkens the typical pigmentation in dark bay horses. The results of the study confirm the importance of molecular testing in accurately determining the coat colour of horses. This would help to avoid errors in coat colour descriptions in official breeding records and provide valuable information for selective breeding programmes aimed at producing specific and desired coat colours.

Musicological reflections on a ceramics exhibition

The history of music knows multiple creations inspired by works of plastic art, exhibitions, tendencies initially asserted in painting. The musical texture reflects the shades of colors, undulations of the sculptures, ideas and conceptions. Similarly, in various paintings or sculptures we will discover images directly related to the field of music: subjects, musical instruments, personalities, etc. An exhibition of ceramics, which suggests through the theme and the ideas promoted, through the subtle links between the visual arts and music, whether of an academic or popular nature, creates musicological reflections and genuine associations, is the one recently presented (January 27 – February 26, 2023) by plastic artist Oleg Dobrovolschi with the title Between Heaven and Earth.

MANUAL METHOD FOR GINGIVAL SHADE SELECTION- A LITERATURE REVIEW

Objective- The purpose of the article is to present a narrative review of the literature related to the different shade guides available for dental practitioners. Materials And Methods- A literature search was performed in the online databases – PubMed, Science Direct, Medline and Google Scholar with the following When fabricating a restoration, patient satisfaction with the shade match is essential. The patients level of satisfaction may not be the same as that of the dental practitioner. Esthetic expectations have dramatically increased in the last few years. Color and shade determination are generally considered difficult in dental practice. Most prostheses fail esthetically owing to improper shade selection. A good understanding of color shade guides is essential for precise shade matching, but the paucity of dental practitioners knowledge of color science because of the numerous available shade guides creates a challenge. This comprehensive review states information on shade selection, different shade guides, and shade matching devices commonly used in dental practice. Dental shade guides are a set of colour standards mimicking the colour of tissues, which dentists aim to restore – tooth structures, gingival tissues or facial structures in facial prosthodontics - skin, mucosa, eyes etc. They can be systematized based on the following principles – fabrication process, the material of manufacturing or restoration and according to the tissues, which are restored. Conclusion: To provide an esthetic restoration to the patient, the dentist must have a full understanding of the science of color and color perception. Matching the correct shade satisfies both the dentist and patient and gives a pleasing appearance to the patient.

STRUCTURAL, SUBSTRUCTURAL, AND ORIENTATIONAL CHANGES IN VARIOUS GRAINS OF POLYCRYSTALLINE ALUMINIUM SAMPLES IN THE PROCESS OF PLASTIC DEFORMATION

The results of determination of orientation changes occurring on the surface of large-crystalline Al (99.96%) samples in situ during their plastic deformation under conditions of active loading with constant strain rate έ = 5∙10-5s-1 are presented. The studies were performed using the technique of obtaining color orientation maps from the specimen surface and subsequent visualization of color shades indistinguishable on it. This allowed us to obtain a number of new results regarding the orientational changes of grains and subgrains and to determine the possible mechanisms of such changes. For the first time the impact of disappearance of grain boundaries was detected and the mechanisms of grain reversal as a whole were determined. For a number of grains, a relay change in the orientation of subgrains in the grain from one boundary to another along the direction of sample stretching was recorded. It is experimentally shown that in this mechanism of orientational changes the maximum relative grain deformation is achieved. In the second case, the orientation changes of the grain as a whole are provided by a layer containing subgrains of 1…5 m in size, the orientation of which changes continuously during the deformation.

Influence of Different Colored Shade Nets on Micro Environmental Parameters and Pest Incidence of Various Ornamental Plants

A field experiment was carried out at Floriculture and Landscaping Block, College of Horticulture, Anantharajupeta during 2022 and 2023. to study the Influence of different colored shade nets on microenvironmental parameters of various ornamental plants. The experiment consists of 25 treatments with three replications which were laid out in FRBD. The treatments were formed with two factors viz. Factor I (Colour shade nets, Green (C1), White (C2), Black (C3), Red nets (C4) and Open (C5) condition and Factor II plants (Pandanus veitchii (P1), Epipremnum aureum (P2), Sansevieria trifasciata (P3), Aglaonema commutatum var. Redgold (P4), Rhoeo spathacea (P5) were taken. The results shown that the maximum temperature was under black net (32.43, 34.10 0C in first and second year respectively), maximum RH was under black net (88.09, 83.11 % in first and second year respectively), lowest canopy temperature was under shade nets than open. Maximum light intensity (653.21, 669.4 lux in first and second year respectively), average PAR values were maximum under white net (718.05 µmol m-2 s-1) in both years. Mealy bug incidence was maximum under black net in both years during the period of study

Visual Versus Digital Color Determination of 3D-Printed Teeth as an Exercise in Dental Students' Education.

Visual color determination is part of the daily routine in dental practice. However, it is not a part of dental education so far. The aim of this study was to evaluate whether visual or digital tooth color determination of 3D-printed teeth is a reliable tool for inexperienced dentistry students. Preclinical dental students evaluated eleven 3D-printed, tooth-shaped samples (VarseoSmile Crown plus, BEGO, Bremen, Germany) of different color shades. Visual shade determination using a reference scale (3D-Master Toothguide (3DM_TG), VITA Zahnfabrik, Bad Säckingen, Germany), followed by a digital color determination using a spectrophotometer (VITA Easyshade V, (ES_V), VITA Zahnfabrik), was performed. Color deviation was calculated in the Lab* color space (ΔE00) and converted into CIELAB 2000. The results were evaluated using the Mann-Whitney U test and the Wilcoxon Rank Sum test (α = 0.05). Significant differences between visual and digital color determination were proven (p < 0.001). Visual color determination (3DM_TG) showed a mean deviation (ΔE00 ± 95%CI) of 6.49 ± 0.47. Digital color determination (ES_V) showed significantly lower mean deviations of ΔE00 of 1.44 ± 0.58. Digital tooth color measurement using a spectrophotometer was a more reliable tool for the color determination of 3D-printed teeth for inexperienced dentistry students.

Working Memory Maintenance of Visual and Auditory Spatial Information Relies on Supramodal Neural Codes in the Dorsal Frontoparietal Cortex.

The frontoparietal attention network plays a pivotal role during working memory (WM) maintenance, especially under high-load conditions. Nevertheless, there is ongoing debate regarding whether this network relies on supramodal or modality-specific neural signatures. In this study, we used multi-voxel pattern analysis (MVPA) to evaluate the neural representation of visual versus auditory information during WM maintenance. During fMRI scanning, participants maintained small or large spatial configurations (low- or high-load trials) of either colour shades or sound pitches in WM for later retrieval. Participants were less accurate in retrieving high- vs. low-load trials, demonstrating an effective manipulation of WM load, irrespective of the sensory modality. The frontoparietal regions involved in maintaining high- vs. low-load spatial maps in either sensory modality were highlighted using a conjunction analysis. Widespread activity was found across the dorsal frontoparietal network, peaking on the frontal eye fields and the superior parietal lobule, bilaterally. Within these regions, MVPAs were performed to quantify the pattern of distinctness of visual vs. auditory neural codes during WM maintenance. These analyses failed to reveal distinguishable patterns in the dorsal frontoparietal regions, thus providing support for a common, supramodal neural code associated with the retention of either visual or auditory spatial configurations.

OBJECTIVE ASSESSMENT OF COLOURS' WARMTH

In this article, the possibility of colour contrast in applied television systems with a wide dynamic range is considered and a method for assessing the perception of the warmth of colour shades is proposed. To do this, at the first stage, a colour space is selected that specifies a coordinate system for colour shades. Next, a selection of colours is formed in the colour space, participating in further studies to assess the perception of colour warmth. The scientific work also discusses the creation of a test trial. An algorithm is presented for a web program that conducts a survey of the subject. Subject survey data is stored on a separate server and is available for further processing. The following is an example of processing preliminary data for 18 colour shades, but it is proposed to further expand the number of colour shades to 36.

Feasibility and Safety of Adopting a New Approach in Delivering a 450 nm Blue Laser with a Flattop Beam Profile in Vital Tooth Whitening. A Clinical Case Series with an 8-Month Follow-Up.

A prospective observational case series included six patients who presented with discoloured upper and lower teeth extending from the right second premolar to the left second premolar. The photoactivation dosimetry and treatment protocol were as follows: λ 450 nm, 1 W, CW; flattop beam profile; 1 cm2; 15 J/spot; 10 irradiated spots; an irradiation time of 15 s/spot; three whitening cycles in a single session. Blanc One ULTRA+ was the bleaching agent. A visual analogue scale (VAS) was utilised to evaluate the pain intensity and dental hypersensitivity during treatment immediately after complete treatment (T1), 24 h (T2), and 8 h (T3) postoperatively, and at an 8-month follow-up timepoint (T4), whereas the dental colour shade change was assessed using the VITA colour shade guide pre-treatment (T0), T1, and T4. The Gingival index and modified Wong Baker faces scale were utilised to evaluate gingival inflammation and patients' treatment satisfaction, respectively. Our findings revealed a reduction in the dental colour shade of the six cases between 2 and 10- fold (average of 3.5-fold) at T1 and maintained at T4, indicating significant improvement in the colour shade change with optimal outcomes. The percentage of this improvement for all the patients was ranged between 16.6% and 33.3%. At all timepoints, a "0" score was provided for pain intensity, dental hypersensitivity, and gingival inflammation. Our study demonstrates the feasibility and safety of a λ 450 nm laser delivered with a flattop handpiece to achieve optimal whitening outcomes without adverse effects. This offers a useful guide for dental clinicians for vital in-office tooth whitening. Extensive clinical studies with large data are warranted to validate our study protocol.

The Early Concept of the Celtic Colour Term glas in Welsh and Irish and its Later Semantic Diversification

The Celtic colour term glas has been subject to a number of misconceptions over the decades, e.g.that it is a grue category, that it is untranslatable, and that the range of colour shades covered by glas is cross-linguistically rare. Coming from a diachronic perspective, this article aims to give a logical explanation of the developments of the semantics of glas, followed by an overview of the synchronic semantics of the word in both Irish and Welsh.

Do color enhancement algorithms improve the experience of color-deficient people? An empirical study based on smartphones.

Approximately 8% of the global population experiences color-vision deficiency. It is important to note that "color-vision deficiency" is distinct from "color blindness," as used in this article, which refers to the difficulty in distinguishing certain shades of color. This study explores color enhancement algorithms based on the neural mechanisms of color blindness and color deficiency. The algorithms are then applied to smartphones to improve the user experience (UX) of color-enhancing features in different top-selling smartphone brands with different operating systems (OS). A color-enhancing application program was developed for individuals with color-vision deficiency and compared to two other mature color-enhancing programs found in top-selling smartphones with different mainstream operating systems. The study included both objective and subjective evaluations. The research materials covered three aspects: daily life, information visualization, and videos. Additionally, this research study examines various levels of color enhancement through three dimensions of subjective evaluation: color contrast, color naturalness, and color preference. The results indicate that all color-enhancing features are beneficial for individuals with color-vision deficiencies due to their strong color contrast. The users' color preference is closely linked to color naturalness. The application program preserves the naturalness of colors better than the other two color-enhancing features. The subjective evaluations show similar trends across different operating systems, with differences arising from the use of different color-enhancing algorithms. Therefore, different algorithms may result in different sizes of the color gamut.

Impact of ZnMn2O4/CdS nanocomposite on the structural, optical and dielectric characteristics of PMMA/PEO blend

Herein, polymethyl methacrylate (PMMA)/ polyethylene oxide (PEO) blend doped with nanocomposite (1 − x) ZnMn2O4/xCdS samples were prepared through two steps, the first comprising nanocomposite (1 − x) ZnMn2O4/xCdS samples synthesizing, while the second was the incorporation of nanocomposites into the blend matrix, and finally the films were obtained through the casting solution method. Various techniques, such as X-ray diffraction, scanning electron microscopy, diffused reflection and impedance spectroscopy were used to determine the change in the PMMA/PEO structure after the inclusion of the nanocomposites. The direct and indirect optical bandgap values for the PMMA/PEO blend decreased from 5.04 and 4.8 eV to 4.99 and 4.7 eV, respectively, as the blend doped with (1 − x) ZnMn2O4/xCdS samples. At 600 nm, the refractive index of the blend was raised from 1.37 to 1.53 as it doped with 0.9 ZnMn2O4/0.1CdS sample. The linear and nonlinear optical parameters grow with the insertion of (1-x)ZnMn2O4/xCdS nanocomposites into the PMMA/PEO blend. Variation of CdS in the doped nanocomposites affects slightly the linear and nonlinear optical parameters of the host blend. Blend containing 10 % CdS has the highest linear and nonlinear optical parameters as compared with other doped blends. All of the blends exhibited different shades of blue color, except for the blend that contained 10 % CdS, which displayed a violet color. The effect of doping on the dielectric properties of different blends was also explored. Blend with 20 % CdS has the highest energy density. This improvement implies the use of prepared blends in different optoelectronic, photocatalytic and storage device applications.

Environmentally friendly greener approach toward sustainable application of amaltas brown pod-based natural colorant for wool yarn dyeing

The escalating concerns over the environmental impacts of synthetic dyes have catalyzed a shift toward sustainable and eco-friendly alternatives in the textile industry. Within this framework, the purpose of this research article is to investigate the environmentally friendly application of brown pods generated from amaltas ( Cassia fistula) as a natural pigment for the purpose of dyeing wool yarn. The purpose of this study is to investigate the possibility of obtaining the reddish-brown anthraquinone-based pigment that is found in Cassia fistula pods by the application of microwave-assisted extraction process. The efficacy of microwave radiation in enhancing the extraction process is evaluated, highlighting its potential for expediting and improving the yield of the natural colorant. In addition, the response surface methodology is utilized in order to optimize the dyeing conditions. Particular attention is paid to characteristics like as temperature, duration, pH, and salt content. In addition, the study investigates the function of mordants, notably salt of Fe, salt of Al, and tartaric acid, in the process of improving colorfastness and generating shades that are both brilliant and long-lasting. The scope of the work is expanded to include the impacts of plant-based extracts as a biomordants, such as pomegranate, red sumac, and hulela zard, for the purpose of producing a wide variety of colors. Additionally, the impact of microwave treatment on wool yarn dyeability is explored, emphasizing improvements in surface morphology and dye absorption. The yarn analysis encompasses color strength, shade variation, and surface morphology, employing techniques such as Fourier transform infrared spectroscopy (FTIR) to elucidate chemical interactions. The study’s findings contribute to the growing body of knowledge on sustainable dyeing practices, highlighting the viability of amaltas-based natural pigments and environmentally friendly mordants in textile applications. Ultimately, this research underscores the significance of adopting ecologically conscious dyeing methods and paves the way for a more sustainable approach to coloration in the textile industry.

Surrounding and background shades effect on color adjustment of single-shade composites.

This study evaluated the effects of surrounding and background shades on the color adjustment potential (CAP) and visual color match of two single-shade composites, Vittra APS Unique and Charisma Diamond One. Cylinder-shaped specimens were constructed, consisting of either single-shade composites alone (simple) or composites surrounded by the Forma material at shades A1 or A3 (dual). Simple specimens using only the Forma at the specified shades were also prepared. Color measurements of simple specimens were taken against a gray background using a spectrophotometer. For dual specimens, the color of the inner composite was measured against a gray or chromatic (the same shade as the outer composite) background. Color differences (ΔE00) between the single-shade composites and the A1/A3 composite were calculated. CAP was determined by comparing data from simple and dual specimens. Four experienced dentists scored the color match (perfect to unacceptable) for each specimen using a viewing booth illuminated by an illuminant D65. Data were analyzed with repeated-measures ANOVA and the Kruskal-Wallis test. The results showed that both single-shade composites showed the lowest color discrepancies when they were compared to A1 and A3. Using a chromatic background only significantly affected the CAP when the outer composite was A3. The visual analysis showed poor color matches between the single-shade and control chromatic composites, except for Charisma Diamond One surrounded by A1. In conclusion, the CAP values of the evaluated single-shade composites were impacted by both surrounding shade and background color, and the color match of these materials tended to be poor.

Verbal representation of the emotional world of heroes: based on the material of the Khakass heroic legend «Албынҷы»

The language of the heroic tale is a complex system that encodes information about the national, ideological, cultural foundations of an ethnic group, and is significantly different from the literary and colloquial styles of the modern language. Despite the fact that the texts of heroic tales have always aroused the scientific interest of researchers, their linguistic categories have not yet received sufficient study. The purpose of our article is to identify and describe the linguistic (in particular, verbal) expression of the emotional world of heroes. The material for the functional-semantic analysis was the verbal vocabulary with the meaning of emotion, collected by continuous sampling from the text of the Khakass heroic legend «Албынҷы». According to our information, this folklore monument contains 19 verbs, 3 phraseological units and 1 clichéd expression representing the emotional world of epic characters. The small number of representatives of the emotional world of heroes is compensated by their ambiguity and, accordingly, their ability to cover all the necessary aspects of emotional activity. The work used descriptive (descriptiveanalytical) and functional-semantic research methods. The relevance of our research is due to the insufficient knowledge of the language of Khakass heroic tales, in particular, the verbal sphere from the perspective of the anthropocentric paradigm, as well as the small number of special works on this topic based on the material of other Turkic folklore texts. The novelty of the research is that for the first time, not only in Khakass, but also in other Turkic languages, verbs expressing the emotional experiences of heroes are considered as an irreplaceable and important fragment of the folk-linguistic picture of the world. During the analysis of linguistic material, it was revealed that epic heroes can experience the following emotions: anger, surprise, excitement, fear, compassion, shame, love (more precisely, dislike), suffering, grief, which are expressed by stylistically neutral, frequency verbs. And also the verbal vocabulary with the meaning of crying and laughter stands somewhat apart from them, since its content equally contains emotions and the physiological reaction of the subject to the corresponding emotional stimuli. Clichéd expressions and phraseological units also add shades of color and originality to the process of emotional activity. Linguistic folkloristics, as a new direction in Khakassian studies, is at the initial stage of its development. The language of Khakass heroic tales has many unstudied, unsolved, and therefore interesting conceptual fields in the lexical-semantic, functional-semantic, semantic-cognitive, linguocultural aspects. We believe that this topic has good linguistic potential and prospects for future research.

Dependence of quality indicators of tea leaves on soil metal ions

The article presents information on the influence of metal ions on the shoots of the Chinese tea plant - Thea sinensis L., cultivated in experimental and field conditions of the Lankaran Regional Scientific Center. The research was carried out in 2022-2023 on river sections located in the village of Khanbulan of Lankaran region, and the village of Khychu, Lerik region, which represent a subtropical zone with high humidity. Soil samples were taken and its water capacity and water-holding capacity, mechanical and organic components, as well as ions of certain metals were determined. The tea plant is very sensitive to environmental factors. Demanding on soil acidity, relative humidity, light and heat. Therefore, in our studies, to ensure the dynamic development of the tea plant, ash-yellow and ash-clay-yellow soil samples were taken. Thus, since the common soil types in this region are ash-clay-yellow and provide the presence of metal ions in the lump, this affects both the quality of the tea leaf and the antioxidant nature of the bioactive compounds of the extractive substance, as well as the color shades of tea. It is in this regard that the tea plant differs significantly from other drinks in its active influence on people’s well-being and health. For this, flavonoids are used in tea leaves - theine, catechin + theine complex, flavanol, caffeine, etc. Quantitative indicators are defined as a quantitative change in the extractive substance depending on metal-ions [1, 2, 3]. It is clear from the research that a certain metal ion is dominant for tea plants according to the nature of soil types. For the tea plant, FeO, Fe2O3, Ał2O3, MnO (iron and aluminum ions) are of special importance and are indispensable nutrients.