Skin Color Research Articles

A Wide Color Gamut and Noniridescent Zinc-Anode Asymmetric Electrochromic Device for Self-Sustaining Color-Adaptive Bio-Camouflage System.

Inspired by camouflage-colored organisms, the development of bio-camouflage systems using electrochromic (EC) technology has gained significant interest. However, existing EC systems struggle with achieving a wide color gamut, noniridescent colors, and self-sustainability. Herein, a self-sustainable color-adaptive bio-camouflage system integrating EC and nanogenerator (NG) technologies, enabling environmental color adaptation, and thermal regulation without an external power source is proposed. The system is based on a zinc-anode EC device (ZECD) with an asymmetric structure, incorporating flexible tungsten oxide and vanadium oxide electrodes. During the EC process, tungsten oxide shifts between blue and transparent, allowing near-infrared thermal modulation, while the vanadium oxide transitions from yellow to transparent. This design enables reversible near-infrared modulation and noniridescent color conversion among black, blue, green, yellow, and transparent. For the self-sustainability of the system, an electromagnetic and triboelectric hybrid NG that collects biomechanical energy is developed. In a typical driven cycle, the integrated system transitions colors and achieves significant near-infrared spectral modulation, demonstrating environmental adaptability and thermal regulation. Experiments on human skin and simulated chameleon color changes further confirm the system's effectiveness. This work highlights the potential of integrating EC and NG technologies to advance color-adaptive camouflage systems, opening new an avenue for bio-camouflage design.

Characterization of Prickly Pear plantations in semi-arid zones! A green revolution in East Algeria: Case of the Tébessa region

The study carried out on the prickly pear shrub, in three potential production sites belonging to the commune of Ain Zerga district of Tébessa in the extreme east of the Algerian arid zone. The aim of this study was to try to interpret the main characteristics and sources of variability of this shrub of multiple interests. Carried out in 2023 on orchards planted with adult Opuntia ficus indica, developed in 45 orchards divided into 15 per site located in three localities, namely Henchir Lahdid, El Guefaifia, and Ouled Mebarek. The trees are grown extensively, with production starting in the last week of May. The cactus shrub reaches an equivalent production (10.23) kg and a production of 11,137.65kg/ha. At the time of the commercial harvest, indicated by the change in skin color, we carried out a random collection of 05 fruits per orchard, i.e. 75 fruits per site (225 fruits); these fruits were evaluated by various measurements. Shrub-specific variables such as fruit position in the canopy, cladode length, width, density, and inter-line spacing, number and weight of fruits per tree and per cladode, and annual productivity were studied. These variables per cactus shrub and fruit changed significantly as a function of climatic and edaphic environmental conditions, i.e. site and altitude, while the number of seeds/fruits was conditioned by volume. Fruit weight varied greatly within the same tree, influenced by the number of fruits per tree and the surface area of the cladodes; this variability decreased for cladodes bearing more than six fruits. Interception of climatic conditions (light) and cladode dry weight were the sources of variability in fruit weight, whereas Opuntia plant/hectare density had no effect on fruit quality.

A transcription factor, PbWRKY24, contributes to russet skin formation in pear fruits by modulating lignin accumulation

Abstract Skin color is one of the major traits of fruit appearance quality in pear (Pyrus), which affects the fruit commodity value. Russet skin protects pear fruits from environmental stresses and its formation process is closely linked to lignin accumulation. However, the molecular regulatory networks underlying russet skin formation in pear fruits involve complex secondary metabolic pathways and remain elusive. Here, we explored the regulatory mechanisms underlying lignin accumulation in pear skin based on transcriptome sequencing, co-expression network analysis, and gene expression profiling. We identified a WRKY transcription factor gene, PbWRKY24, that regulates russet skin formation in pear fruits. The relative expression of PbWRKY24 in russet pear skin was significantly correlated with lignin content. We then verified the function of PbWRKY24 in lignin accumulation via genetic transformation. DNA affinity purification sequencing revealed that PbWRKY24 directly binds to the promoter of a lignin biosynthesis gene, PbPRX4. This binding was confirmed by yeast one-hybrid, dual-luciferase, and electrophoretic mobility shift assays. Overexpression of PbPRX4 in pear skin stimulated lignin accumulation and consequently promoted russet skin formation. This study provides a glimpse into the intricate lignin biosynthesis mechanisms during russet skin formation in pear fruits, which is of practical significance to pear breeding for fruit quality.

Alien Rainbow Trout Oncorhynchus mykiss in the Balkhash Basin (Kazakhstan, Central Asia): 50 Years of Naturalization.

Rainbow trout, or mykiss (Oncorhynchus mykiss), is one of the most popular species used in aquaculture and has been naturalized worldwide, including in the Central Asian Balkhash basin, which has unique aboriginal fish fauna. Both rainbow trout from European farms and wild mykiss from Kamchatka were introduced to some mountain lakes and rivers of the Balkhash basin about 50 years ago. This study investigates the current distribution and life history traits of the alien species and its possible impact on the local fish fauna. This study showed that the rainbow trout occupies various habitats in the Ili River basin: mountain lakes, fast-flowing mountain rivers, and lowland rivers with slow currents and warm water (up to +27 °C). Rainbow trout from European fish farms dominate the mountain Middle Kolsay Lake, while the wild trout from Kamchatka occupies the small Ulken Kokpak River. Both co-occur in the Chilik River. Contrary to that in other regions, the distribution of rainbow trout in the Balkhash basin remained almost the same after their introduction. Broad intrapopulation variability in terms of size, growth rate, and maturation age was revealed, apparently as a result of adaptation to the new environment and intrapopulation competition. In particular, the growth rate has decreased, but life span, surprisingly, has increased as compared to the originally introduced fish. Intrapopulation variation in growth and maturity patterns was also noted. Differences in skin coloration between highland (cold-water) and lowland (warm-water) populations were discovered. The feeding mode of naturalized trout is insectivorous (insect imago), indicating that it occupies its own niche in the local fish communities. The largest population of rainbow trout was recorded in the Lower Kolsay Lake, lowering the population of native fish species, while in other localities, no negative impact on local fish communities was recorded.

Skin senescence—from basic research to clinical practice

The most recognizable implications of tissue aging manifest themselves on the skin. Skin laxity, roughness, pigmentation disorders, age spots, wrinkles, telangiectasia or hair graying are symptoms of physiological aging. Development of the senescent phenotype depends on the interaction between aging cells and remodeling of the skin’s extracellular matrix (ECM) that contains collagen and elastic fiber. Aging changes occur due to the combination of both endogenous (gene mutation, cellular metabolism or hormonal agents) and exogenous factors (ultraviolet light, environmental pollutants, and unsuitable diet). However, overproduction of mitochondrial reactive oxygen species (ROS) is a key factor driving cellular senescence. Aging theories have disclosed a range of diverse molecular mechanisms that are associated with cellular senescence of the body. Theories best supported by evidence include protein glycation, oxidative stress, telomere shortening, cell cycle arrest, and a limited number of cell divisions. Accumulation of the ECM damage is suggested to be a key factor in skin aging. Every cell indicates a functional and morphological change that may be used as a biomarker of senescence. Senescence-associated β-galactosidase (SA-β-gal), cell cycle inhibitors (p16INK4a, p21CIP1, p27, p53), DNA segments with chromatin alterations reinforcing senescence (DNA-SCARS), senescence-associated heterochromatin foci (SAHF), shortening of telomeres or downregulation of lamina B1 constitute just an example of aging biomarkers known so far. Aging may also be assessed non-invasively through measuring the skin fluorescence of advanced glycation end-products (AGEs). This review summarizes the recent knowledge on the pathogenesis and clinical conditions of skin aging as well as biomarkers of skin senescence.

Mother of All Labour: Vulnerability and Immunity in Times of Ebola

Wonkifong Ebola treatment unit was unique at the time of the outbreak that hit the Guinea in 2014. Contrary to other infrastructures run by Western workers, Wonkifong mainly employed personnel from Guinea, the Democratic Republic of Congo, and Cuba. Even so, the unit constituted a racialised landscape where proximity to white agencies granted privileges to certain groups of racialised people while excluding others. In a humanitarian infrastructure aimed at empowering knowledge of epidemics in the Global South, Black children were quarantined without their parents and left mostly unattended. After many months, former patients were hired as nannies to remedy the infrastructure’s blind spot. These women were employed to care for the children thanks to their immunity to the virus. Building on the concept of a ‘politics of life’ and exploring how these women were exploited as ‘medical superbodies’, my article sheds light on how the humanitarian infrastructure produced a gendered labour that mirrors other economies exploiting female Black bodies such as the colony or the plantation. Relying on an ethnography of practices of care and mobility within the unit, this piece underlines how the postcolonial segregation at play during the outbreak operated not strictly in terms of skin colour, but in terms of gender and closeness to white power.

Associations of ethnicity, skin tone, and genome-wide sequencingwith bone mineral density in adolescents.

Dual-energy x-ray absorptiometry reference data designate Black and non-Black categories, as higher BMD has been documented among Black youth. We examined associations of race, skin tone, and genetic factors with bone mineral density (BMD). 557 adolescents were followed longitudinally. Exposures included race, skin tone, and principal components (PC) from genome-wide arrays. Total body BMD Z-score (BMD-Z) was the primary outcome using linear regression. 359 adolescents identified as non-Hispanic White (NHW) and 75, non-Hispanic Black (NHB). BMD-Z was higher in NHB vs. NHW (β: 0.92 units, 95% CI: 0.64, 1.19) or those with darker skin (0.79, 95% CI: 0.49, 1.08 for brown vs. medium). The first genetic PC (PC1) correlated with identification as NHB. PC1 was associated with higher BMD-Z (0.09, 95% CI: 0.06, 0.12), even after including race (0.07, 95% CI: 0.00, 0.14) or skin tone (0.10, 95% CI: 0.05, 0.15); both race (0.26, 95% CI: -0.49, 1.01 for NHB vs. NHW) and skin tone (-0.08, 95% CI: -0.59, 0.44 for brown vs. medium) no longer predicted BMD-Z after adjustment for PC1. Genetic similarity was robustly associated with BMD, prompting a reevaluation of adolescent BMD reference data to exclude the consideration of race. Current bone density reference databases include a binary assignment of patients into "Black" and "non-Black" categories, as a higher BMD has been documented among those identifying as Black compared with individuals of other racial and ethnic backgrounds. This study found genetic similarity to be more strongly associated with bone density by dual-energy x-ray absorptiometry than race or skin tone. These data emphasize a need to reevaluate how bone density measurements are interpreted, including exploring reference data that exclude the consideration of race.

Single nucleotide polymorphism (SNP) analysis reveals ancestry and genetic diversity of cultivated and wild grapevines in Croatia

BackgroundCroatia is a geographically small country with a remarkable diversity of cultivated and spontaneous grapevines. Local germplasm has been characterised by microsatellite markers, but a detailed analysis based on single nucleotide polymorphisms (SNPs) is still lacking. Here we characterize the genetic diversity of 149 accessions from three germplasm repositories and four natural sites using 516,101 SNPs to identify complete parent-offspring trios and their relations with spontaneous populations, offering a proof-of-concept for the use of reduced-representation genome sequencing in population genetics and genome-wide association studies (GWAS).ResultsPrincipal component analysis revealed a clear discontinuity between cultivated (V. vinifera subsp. sativa) and spontaneous grapevines, supporting the notion that the latter represent local populations of the wild progenitor (V. vinifera subsp. sylvestris). ADMIXTURE identified three ancestry components. Two sativa components are alternatively predominant in cultivars grown either in northern Adriatic Croatia and Continental Croatia or in Dalmatia (i.e. central and southern Adriatic Croatia). A sylvestris component, which is predominant in accessions from spontaneous populations, is a minor ancestry component in cultivated accessions. TREEMIX provided evidence of unidirectional migration from the vineyards to natural sites, suggesting that gene flow has gone preferentially from the introduced domesticated germplasm into local wild populations rather than vice versa. Identity-by-descent analysis indicated an extensive kinship network, including 14 complete parent-offspring trios, involving only cultivated accessions, six full-sibling relationships and invalidated a presumed pedigree of one of the most important varieties in Croatia, ‘Plavac Mali’. Despite this strong population structure, significant association was found between 143 SNPs and berry skin colour and between 2 SNPs and leaf hairiness, across two previously known genomic regions.ConclusionsThe clear genetic separation between Croatian cultivars and sylvestris ruled out the hypothesis that those cultivars originated from local domestication events. On the other hand, the evidence of a crop-to-wild gene flow signals the need for an urgent adoption of conservation strategies that preserve the residual genetic integrity of wild relatives. The use of this reduced-representation genome sequencing protocol in grapevine enables an accurate pedigree reconstruction and can be recommended for GWAS experiments.

Transcriptomic Analysis During Olive Fruit Development and Expression Profiling of Fatty Acid Desaturase Genes.

The olive fruit is a drupe whose development and ripening takes several months from flowering to full maturation. During this period, several biochemical and physiological changes occur that affect the skin color, texture, composition, and size of the mesocarp. The final result is a fruit rich in fatty acids, phenolic compounds, tocopherols, pigments, sterols, terpenoids, and other compounds of nutritional interest. In this work, a transcriptomic analysis was performed using flowers (T0) and mesocarp tissue at seven different stages during olive fruit development and ripening (T1-T7) of the 'Picual' cultivar. A total of 1755 genes overexpressed at any time with respect to the flowering stage were further analyzed. These genes were grouped into eight clusters based on their expression profile. The gene enrichment analysis revealed the most relevant biological process of every cluster. Highlighting the important role of hormones at very early stages of fruit development (T1, Cluster 1), whereas genes involved in fatty acid biosynthesis were relevant throughout the fruit developmental process. Hence, genes coding for different fatty acid desaturase (SAD, FAD2, FAD3, FAD4, FAD5, FAD6, and FAD7) enzymes received special attention. In particular, 26 genes coding for different fatty acid desaturase enzymes were identified in the 'Picual' genome, contributing to the improvement of the genome annotation. The expression pattern of these genes during fruit development corroborated their role in determining fatty acid composition.

The relationship of tooth shade and skin tone and its influence on smile attractiveness in native South Indians: A web-based cross sectional survey

ObjectivesThis study aimed to investigate the influence of tooth shade and skin tone on smile attractiveness among native South Indians. The primary research question was whether there is a significant relationship between these variables and perceived smile attractiveness. Materials and methodsA web-based cross-sectional survey was conducted with approval from the Institutional Review Board of (Thai Moogambigai Dental College and Hospital, Chennai). Standardized smile photographs of two South Indian models (one male and one female) were digitally modified to display four different tooth shades and four different skin tones, resulting in 32 images. These images were incorporated into a Google Form along with a questionnaire and a Visual Analog Scale (VAS) for attractiveness rating. The survey was distributed to 1200 participants, including both dental professionals and the general population, with 1000 valid responses recorded. Statistical analysis was performed using IBM SPSS Statistics, employing parametric tests to evaluate the data. ResultsThe study found that lighter tooth shades were consistently rated higher in attractiveness for both genders. Lighter tooth shades such as FS1T1 and FS2T1 scored means of 6.88 and 7.27 respectively for females, while darker shades like FS1T4 scored lower with a mean of 4.95. Similarly, males showed a preference for lighter tooth shades with MS1T1 and MS2T1 scoring means of 5.57 and 5.78 respectively compared to darker shades like MS1T4 with a mean of 3.63. Significant differences were noted across age groups and genders, with younger participants and females showing a stronger preference for lighter tooth shades. ConclusionsThe study concludes that both tooth shade and skin tone significantly influence smile attractiveness, with a clear preference for lighter tooth shades among the surveyed population. These findings suggest the importance of considering these factors in aesthetic dental treatments to enhance patient satisfaction and achieve optimal results. Clinical relevanceThe results underscore the necessity for dental practitioners to take into account both tooth shade and skin tone when planning aesthetic dental treatments. This approach will help in achieving a more harmonious and natural appearance, ultimately improving patient satisfaction with the treatment outcomes. Future research should continue to explore the cultural and individual factors that contribute to these preferences in dental aesthetics.

Exploring Eye, Hair, and Skin Pigmentation in a Spanish Population: Insights from Hirisplex-S Predictions.

Understanding and predicting human pigmentation traits is crucial for individual identification. Genome-wide association studies have revealed numerous pigmentation-associated SNPs, indicating genetic overlap among pigmentation traits and offering the potential to develop predictive models without the need for analyzing large numbers of SNPs. In this study, we assessed the performance of the HIrisPlex-S system, which predicts eye, hair, and skin color, on 412 individuals from the Spanish population. Model performance was calculated using metrics including accuracy, area under the curve, sensitivity, specificity, and positive and negative predictive value. Our results showed high prediction accuracies (70% to 97%) for blue and brown eyes, brown hair, and intermediate skin. However, challenges arose with the remaining categories. The model had difficulty distinguishing between intermediate eye colors and similar shades of hair and exhibited a significant percentage of individuals with incorrectly predicted dark and pale skin, emphasizing the importance of careful interpretation of final predictions. Future studies considering quantitative pigmentation may achieve more accurate predictions by not relying on categories. Furthermore, our findings suggested that not all previously established SNPs showed a significant association with pigmentation in our population. For instance, the number of markers used for eye color prediction could be reduced to four while still maintaining reasonable predictive accuracy within our population. Overall, our results suggest that it may be possible to reduce the number of SNPs used in some cases without compromising accuracy. However, further validation in larger and more diverse populations is essential to draw firm conclusions and make broader generalizations.

Role of dysphemisms in the English-language film space

The topicality of undertaken research is determined by the constantly changing social norms in modern society, which are reflected in the cinematographic world. Cinematography provides a golden opportunity to consider and analyze a range of unique linguistic phenomena. The major purpose of the present paper is to study the phenomenon of dysphemisation in the English-speaking film space based on the set of the following films in English: Green Book by the American film director, Peter J. Farrelly, the screen adaptation of the autobiography 12 Years a Slave by Terrence S. McQueen, the well-known film The Help by Tate Taylor and the biographical drama Hidden Figures by Theodore Melfi. In the films the main storyline is generally based on the aspect of discrimination against persons of certain racial backgrounds and women, based on the policy of the United States of America during the infamous period of slavery (XVII–XIX centuries) and the historical era of segregation (XIX–XX centuries). During the study theoretical methods (analysis and synthesis) and empirical methods (observation and description) were used. As a result of the conducted study, the classification of dysphemistic lexical units was determined in terms of author’s intentions (dysphemisms with an emphasis on a different skin color; dysphemisms-comparisons with animals, plants and inanimate objects; dysphemisms-designations of social status; dysphemisms expressing gender discrimination), as well as their role and reason for use in the selected set of films – demonstration of a biased, cruel attitude towards recipients and also a reflection of the socio-cultural environment that encompassed US society during the historical time period under study.

Advancements in 3D Skin Bioprinting: Processes, Bioinks, Applications and Sensor Integration

Abstract This comprehensive review explores the multifaceted landscape of skin bioprinting, revolutionizing dermatological research. The applications of skin bioprinting utilizing techniques like extrusion-, droplet-, laser- and light-based methods, with specialized bioinks for skin biofabrication have been critically reviewed along with the intricate aspects of bioprinting hair follicles, sweat glands, and achieving skin pigmentation. Challenges remain with the need for vascularization, safety concerns, and the integration of automated processes for effective clinical translation. The review further investigates the incorporation of biosensor technologies, emphasizing their role in monitoring and enhancing the wound healing process. While highlighting the remarkable progress in the field, critical limitations and concerns are critically examined to provide a balanced perspective. This synthesis aims to guide scientists, engineers, and healthcare providers, fostering a deeper understanding of the current state, challenges, and future directions in skin bioprinting for transformative applications in tissue engineering and regenerative medicine.

Inclusive and Accurate Clinical Diagnostics Using Intelligent Computation and Smartphone Imaging.

Smartphone-based colorimetry has been widely applied in clinical analysis, although significant challenges remain in its practical implementation, including the need to consider biases introduced by the ambient imaging environment, which limit its potential within a clinical decision pathway. In addition, most commercial devices demonstrate variability introduced by manufacturer-to-manufacturer differences. Here, we undertake a systematic characterization of the potential imaging interferences that lead to this limited performance in conventional smartphones and, in doing so, provide a comprehensive new understanding of smartphone color imaging. Through derivation of a strongly correlated parameter for sample quantification, we enable real-time imaging, which for the first time, takes the first steps to turning the mobile phone camera into an analytical instrument - irrespective of model, software, and the operating systems used. We demonstrate clinical applicability through the imaging of patients' skin, enabling rapid and convenient diagnosis of cyanosis and measurement of local oxygen concentration to a level that unlocks clinical decision-making for monitoring cardiovascular disease and anemia. Importantly, we show that our solution also accounts for the differences in individuals' skin tones as measured across the Fitzpatrick scale, overcoming potential clinically significant errors in current optical oximetry.

From Indigenous Resistance to the Contemporary Argentine Contempt for Authority

The political stability of a modern democracy, excluding environmental or external causes, is determined by multiple factors, all influenced by human behaviour. One indicator of political stability that takes the human factor into account is the time in office of a ruler. The stability of a ruler can be directly affected, for example, if they are killed, or indirectly, if the laws issued by the ruler are not followed. Non-compliance is dependent on the level of contempt for authority among citizens. A post-hoc hypothesis from a previous publication suggests that indigenous contempt for the authority of the white conqueror and coloniser is seen as a primary causal factor of political instability in Argentina. In this work, indigenous contempt has been shown to have originated from the mistreatment of indigenous peoples by the conqueror and coloniser, and it is expressed in practice by laws and norms being violated as a covert form of resistance. This behaviour has been spread throughout Argentine society due to extensive genetic mixing between Amerindian and Eurasian peoples, initially encouraged by the Spanish Crown. It is observed that these behaviours persist in the 21st century, partly because mistreatment and discrimination against indigenous peoples continue, and partly because pigmentocracy exists, a social system where wealth and status depend on skin colour. It is therefore crucial to understand that a large part of the causes of Argentina's political instability can be traced to the non-compliance with laws and regulations, which originated as forms of indigenous resistance to the Spanish conqueror and coloniser. Public policies aimed at improving compliance should be designed to integrate indigenous cultures into Argentine identity, ensuring that all citizens wish to comply with the laws because they now see them as their own.

Understanding stakeholder perspectives on Apgar score, cyanosis and identifying jaundice in ethnic minority neonates.

To explore neonatal assessments that include an element of evaluating skin colour in neonates of black, Asian and minority ethnicities, focusing on the Apgar score, presence of cyanosis and presence of jaundice. We employed focused ethnography involving diverse healthcare professionals (HCPs) and parents or caregivers with Black, Asian, or ethnic minority children born in the last five years. Zoom interviews were performed following a semi-structured interview guide. Ethnographic data analysis was conducted using NVivo software. There was a lack of consistency in how HCPs applied the Apgar scores, which also varied from textbook guidelines. The use of pink as a skin colour descriptor for ethnic minority neonates created a divide among both parents and HCPs. HCPs relied more heavily on other elements of the Apgar score or infant breathing and crying at birth to gauge infant wellness. When identifying cyanosis, HCPs depend on specific body locations for accurate assessment of oxygenation, but the limitations of visual assessment are acknowledged. For jaundice, most HCPs recognised the difficulty in identifying the colour yellow in infants with darker skin tones. HCPs focussed on yellowing of the sclera and gums and other well-being assessments to detect jaundice. Some interviewed parents noticed jaundice in their infants before HCPs but felt they were not listened to when raising concerns. HCPs acknowledged the need for additional training to effectively assess the health of ethnic minority infants. This study highlights disparities in neonatal health assessment from the perspectives of healthcare professionals and parents from diverse backgrounds. Varied practices in determining the Apgar score and recognising cyanosis and jaundice signal the need for standardised protocols, appropriate educational materials, and targeted training. Addressing these challenges is vital for equitable care, emphasising comprehensive training and bias mitigation efforts in maternal and neonatal healthcare.

Effects of Dietary Microalgae Schizochytrium sp. Supplementation on Growth Performance and Skin Color in Jack Dempsey cichlid (Rocio octofasciata)

Growth retardation and decreased vivid coloration are significant issues in the ornamental fish market, particularly among cichlids. This study investigates the effects of Schizochytrium sp. microalgae supplementation on the growth and skin coloration of the Jack Dempsey cichlid (Rocio octofasciata). Three experimental groups were established: a control group (C) with no supplementation, and two microalgae-supplemented groups with 0.5% (S05) and 1% (S10). The control group was fed a commercial diet, while the S05 and S10 groups received the microalgae mixed with the commercial feed via spraying. A total of 135 Jack Dempsey fish (mean initial weight: 1.17 ± 0.14 g) were stocked into nine glass tanks (100 L each), with three replicates per group. After a 60-day feeding trial, growth indices revealed significant differences (p<0.05) between the control and algae-supplemented groups. The S10 group exhibited the highest final weight (FW) and the lowest feed conversion ratio (FCR). Additionally, the weight gain (WG) and specific growth rate (SGR) values for the S10 group were significantly higher than those of both the control and S05 groups (p<0.05). However, skin color parameters, including L* (brightness), a* (+red/-green axis), b* (+yellow/-blue axis), chroma (Ch), and hue angle (Hue), showed no statistical differences among the groups. This study demonstrates that a diet supplemented with 1% Schizochytrium sp. can enhance growth parameters and serve as a beneficial feed additive for Jack Dempsey cichlids.

Influence of Grape Heterogeneity on Berry Quality Traits in Table Grapes A Study on the ‘Alphonse Lavallée’ Variety

The study, conducted in 2023 at the vineyard of the Agricultural Research and Application Center of Tokat Gaziosmanpaşa University, focused on the Alphonse Lavallée grape variety, a significant cultivar among table grapes. The research aimed to assess the impact of berry density on various quality parameters. Grape berries were selected across five different density categories (Y0-Y4), including a control group, to evaluate their physical characteristics (including width, length, weight, firmness, and skin color), chemical properties (pH, total titratable acidity, and soluble solids content), and phytochemical attributes (encompassing total phenol content, total antioxidant capacity, and total monomeric anthocyanin levels). The findings revealed that critical quality indicators—namely, soluble solids content, pH, total antioxidant capacity, and total monomeric anthocyanin—were maximized under the Y4 treatment. In contrast, the highest total phenol content was recorded in the Y2 and Y3 treatments. These results underscore the importance of berry density and berry/skin volume as key determinants of grape berry quality. The study contributes valuable insights into the role of these factors in enhancing the overall quality of table grapes, particularly in the context of the Alphonse Lavallée variety.

"What Does 'Age-Friendly' Mean to You?" The Role of Microaggressions in a Retirement and Assisted Living Community.

In conversations about expanding age-friendly ecosystems, the concept of "age-friendliness" has not been explored in relation to residential settings. This multiple case study compared four residents' perspectives on the age-friendliness of a retirement and assisted living community, combining individual semi-structured interviews with observational data and organizational document analyses in a contextualist thematic examination. Three themes depict (A) existing experiences of the setting as "age-friendly" and the tension of the built design vs. identity; (B) resident-to-resident microaggressions, delineated into four sub-themes including identity-related, intergenerational, condition-related microaggressions and their influence on social isolation; and (C) desired experiences of the setting as "age-friendly" reflecting the social design. In cases of visibly perceptible diversity (white cane, darker skin tone), residents fared worse in experiencing microaggressions stemming from ableism, racism, and age differences. Conversely, in cases of visibly imperceptible diversity, residents had more positive or entirely positive experiences. Although the setting met many environmental and healthcare needs, it lacked design factors prioritizing meaningful social relationships between residents, impacting social isolation. Resident-to-resident social relationships are key in the experience of a retirement and assisted living community as age-friendly. Resident-to-resident microaggressions undermine perceptions of the community as age-friendly, and influence social isolation. We reflect on the organizational role in mitigating against negative social relationships and social isolation to maximize dignity.

Community Nurses' Experiences Assessing Early-Stage Pressure Injuries in People With Dark Skin Tones: A Qualitative Descriptive Analysis.

To examine community nurses' experiences of caring for people with dark skin tones at high risk of developing a pressure injury. Qualitative descriptive design. Focus groups and individual semi-structured interviews were conducted among registered nurses working in the community between November 2023 and March 2024. Thematic analysis was used. The findings reveal the lack of nurse education on diverse skin tones, how community nurses gain knowledge on skin tone diversity in the context of pressure injuries and the topics community nurses believe are crucial to improve the management of pressure injuries in patients with dark skin tones. The study highlights the gap in nurse education regarding diverse skin tones, revealing how community nurses acquire knowledge related to pressure injuries in patients with dark skin tones. This research could inform the development of targeted educational programmes and training initiatives, ultimately preventing patient harm and enhancing the quality of care and health outcomes for patients with dark skin tones. It provides valuable insights into key topics that community nurses consider essential for improving the early recognition and management of pressure injuries in people with darker skin tones. The research adhered to the Consolidated Criteria for Reporting Qualitative Research (COREQ) guidelines. A project steering group contributed to the concept of the study and checked the interview questions were relevant and suitable.