Sun Exposure Research Articles

A photoaging smartphone application to promote sun safety behaviors among youth in late childhood and adolescence.

Ultraviolet (UV)-exposure behaviors can directly impact an individual's skin cancer risk, with many habits formed during childhood and adolescence. We explored the utility of a photoaging smartphone application to motivate youth to improve sun safety practices. Participants completed a preintervention survey to gather baseline sun safety perceptions and behaviors. Participants then used a photoaging mobile application to view the projected effects of chronic UV exposure on participants' self-face image over time, followed by a postintervention survey to assess motivation to engage in future sun safety practices. The study sample included 87 participants (median [interquartile (IQR)] age, 14 [11-16] years). Most participants were White (50.6%) and reported skin type that burns a little and tans easily (42.5%). Preintervention sun exposure behaviors among participants revealed that 33 (37.9%) mostly or always used sunscreen on a sunny day, 48 (55.2%) experienced at least one sunburn over the past year, 26 (30.6%) engaged in outdoor sunbathing at least once during the past year, and zero (0%) used indoor tanning beds. Non-skin of color (18 [41.9%], p = .02) and older (24 [41.4%], p = .007) participants more often agreed they felt better with a tan. Most participants agreed the intervention increased their motivation to practice sun-protective behaviors (wear sunscreen, 74 [85.1%]; wear hats, 64 [74.4%]; avoid indoor tanning, 73 [83.9%]; avoid outdoor tanning, 68 [79%]). The findings of this cross-sectional study suggest that a photoaging smartphone application may serve as a useful tool to promote sun safety behaviors from a young age.

Comparisons between wrinkles and photo-ageing detected and self-reported by the participant or identified by trained assessors reveal insights from Chinese individuals in the Singapore/Malaysia Cross-sectional Genetics Epidemiology Study (SMCGES) cohort

BackgroundChanges develop on the facial skin as a person ages. Other than chronological time, it has been discovered that gender, ethnicity, air pollution, smoking, nutrition, and sun exposure are notable risk factors that influence the development of skin ageing phenotypes such as wrinkles and photo-ageing. These risk factors can be quantified through epidemiological collection methods. We previously studied wrinkles and photo-ageing in detail using photo-numeric scales. The analysis was performed on the ethnic Chinese skin by three trained assessors. Recent studies have shown that it is possible to use self-reported data to identify skin-related changes including skin colour and skin cancer. In order to investigate the association between risk factors and skin ageing phenotypic outcomes in large-scale epidemiological studies, it would be useful to evaluate whether it is also possible for participants to self-report signs of ageing on their skin.AimWe have previously identified several validated photo-numeric scales for wrinkling and photo-ageing to use on ethnic Chinese skin. Using these scales, our trained assessors grade wrinkling and photo-ageing with moderately high inter-assessor concordance and agreement. The main objective of this study involves letting participants grade self-reported wrinkling and photo-ageing using these same scales. We aim to compare the concordance and agreement between signs of skin ageing by the participant and signs of ageing identified by our assessors.MethodThree trained assessors studied facial photo-ageing on 1081 ethnic Chinese young adults from the Singapore/Malaysia Cross-sectional Genetics Epidemiology Study (SMCGES) cohort. Self-reported facial photo-ageing data by the same 1081 participants were also collated and the two sets of data are compared.ResultsHere, we found that self-reported signs of photo-ageing are concordant with photo-ageing detected by our assessors. This finding is consistent whether photo-ageing is evaluated through studying wrinkle variations (Spearman’s rank correlation (ρ) value: 0.246–0.329) or through studying dyspigmentation patterns (Spearman’s rank correlation (ρ) value 0.203–0.278). When studying individual wrinkles, both participants and assessors often detect the presence of the same wrinkle (Spearman’s rank correlation (ρ) value 0.249–0.366). A weak-to-fair level of agreement between both participants and assessors (Cohen’s kappa (κ) values: 0.041–0.233) persists and is statistically significant after accounting for agreements due to chance. Both the participant and the assessor are largely consistent in evaluating the extent of photo-ageing (area under curve (AUC) values 0.689–0.769) and in discerning between the presence or absence of a given facial wrinkle (area under curve (AUC) values 0.601–0.856).ConclusionWhen we analyse the overall appearance of the face, our results show that signs of photo-ageing identified by the participant are concordant with signs of photo-ageing identified by our assessors. When we focused our analysis on specific areas of the face, we found that participants were more likely to identify and self-report the same wrinkles that our assessors have also detected. Here, we found that self-reported signs of skin ageing provide a satisfactory approximation to the signs of skin ageing identified by our assessors. The ability to use self-reported signs of skin ageing should also be evaluated on scales beyond the ones discussed in this study. Currently, there are not as many photo-numeric scales for quantifying dyspigmentation patterns as there are for quantifying wrinkle variations. As Chinese skin is known to become dyspigmented more easily with age, more photo-numeric scales need to be developed and properly validated.

Relationship of regional ultraviolet index data with rash and systemic disease activity in youth with childhood-onset systemic lupus: results from the Childhood Arthritis and Rheumatology Research Alliance Registry

ObjectiveTo investigate the association between ultraviolet light index (UVI), as a marker for UV exposure, and seasonality with rash and systemic disease activity in youth with childhood-onset systemic lupus (cSLE) from the Childhood Arthritis and Rheumatology Research Alliance (CARRA) Registry.MethodsWe reviewed data on rash and disease activity from Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2 K) scores from cSLE CARRA Registry participants with visits between 2010 and 2019 and obtained zipcode level UVI data from the National Oceanic and Atmospheric Administration (NOAA). Our main exposures were UVI and season during the month of visit and one month prior to visit. We used mixed-effects logistic regression models to examine associations between regional UVI (by zipcode)/season and odds of rash and severe SLEDAI-2 K score (≥ 5 vs. 0–4), adjusting for age, sex, race and income.ResultsAmong 1222 participants, with a mean of 2.3 visits per participant, 437 visits (15%) had rash and 860 (30%) had SLEDAI-2 K score ≥ 5. There were no associations between UVI during the month prior to visit or the month of the visit and odds of rash or elevated systemic activity. However, fall season was associated with increased odds of rash (OR = 1.59, p = 0.04), but not increased disease activity.ConclusionThis study found no association between UVI and rash or UVI and disease activity. However, further studies directly measuring UV exposure and accounting for patient-level protective behavioral measures may help to better understand the complex relationship between sun exposure and SLE disease activity.

PRESOLRE: study protocol for a primary school-based, cluster randomised controlled trial of three sun exposure risk prevention strategies on Reunion Island

IntroductionReunion Island, a French overseas department, is located in the southern hemisphere, close to the Capricorn tropic. This island has a multicultural and multiethnic population of 860 000 inhabitants, a...

Sun exposure and protection habits: Self-reported attitudes, knowledge and behaviours.

As exposure to UV radiation is the primary modifiable environmental risk factor associated with skin cancer, it remains the principal focus of most prevention strategies. Numerous sun protection campaigns have been implemented worldwide; however, their impact on the actual incidence and mortality rates of skin cancer seems to be limited. To create successful skin cancer prevention campaigns, it is important to have a comprehensive understanding of individuals' attitudes and behaviours regarding sun protection. The aim of the current study was to determine and report on the prevalence of self-reported attitudes, knowledge and behaviours regarding two of the major sun protection recommendations-avoidance of sun exposure and use of sunscreens-in an international representative sample across five continents. This cross-sectional study was conducted in 20 countries using a web-based online survey. A total of 50,552 individuals, comprising 25,388 men (50.22%) and 25,164 women (49.78%), participated in the survey. Among them, 83.2% reported having been voluntarily exposed to the sun (for sun-basking reasons) at least once in the last 12 months, and 47.96% acknowledged being exposed to the sun between the hours of 10 AM and 4 PM. The primary reason for non-adherence was that these hours were the most convenient times (32.28%). Only 24.05% reported applying sunscreen every 2 h when outdoors. Forgetfulness was the primary reason as provided by 27.79% of participants. Males and older age groups were less likely to adopt sun-protective behaviours around the world. Forgetfulness and the challenges posed by time constraints seem to be the biggest barriers to proper adherence. These findings should prompt the collaboration with health authorities and the manufacturers to enhance adherence by setting reasonable sunscreen prices and creating formulations that make their application less burdensome.

Training Family Medicine Residents in Dermoscopy Using an e-Learning Course: Pilot Interventional Study.

Skin cancers are the most common group of cancers diagnosed worldwide. Aging and sun exposure increase their risk. The decline in the number of dermatologists is pushing the issue of dermatological screening back onto family doctors. Dermoscopy is an easy-to-use tool that increases the sensitivity of melanoma diagnosis by 60% to 90%, but its use is limited due to lack of training. The characteristics of "ideal" dermoscopy training have yet to be established. We created a Moodle (Moodle HQ)-based e-learning course to train family medicine residents in dermoscopy. This study aimed to evaluate the evolution of dermoscopy knowledge among family doctors immediately and 1 and 3 months after e-learning training. We conducted a prospective interventional study between April and November 2020 to evaluate an educational program intended for family medicine residents at the University of Montpellier-Nîmes, France. They were asked to complete an e-learning course consisting of 2 modules, with an assessment quiz repeated at 1 (M1) and 3 months (M3). The course was based on a 2-step algorithm, a method of dermoscopic analysis of pigmented skin lesions that is internationally accepted. The objectives of modules 1 and 2 were to differentiate melanocytic lesions from nonmelanocytic lesions and to precisely identify skin lesions by looking for dermoscopic morphological criteria specific to each lesion. Each module consisted of 15 questions with immediate feedback after each question. In total, 134 residents were included, and 66.4% (n=89) and 47% (n=63) of trainees fully participated in the evaluation of module 1 and module 2, respectively. This study showed a significant score improvement 3 months after the training course in 92.1% (n=82) of participants for module 1 and 87.3% (n=55) of participants for module 2 (P<.001). The majority of the participants expressed satisfaction (n=48, 90.6%) with the training course, and 96.3% (n=51) planned to use a dermatoscope in their future practice. Regarding final scores, the only variable that was statistically significant was the resident's initial scores (P=.003) for module 1. No measured variable was found to be associated with retention (midtraining or final evaluation) for module 2. Residents who had completed at least 1 dermatology rotation during medical school had significantly higher initial scores in module 1 at M0 (P=.03). Residents who reported having completed at least 1 dermatology rotation during their family medicine training had a statistically significant higher score at M1 for module 1 and M3 for module 2 (P=.01 and P=.001). The integration of an e-learning training course in dermoscopy into the curriculum of FM residents results in a significant improvement in their diagnosis skills and meets their expectations. Developing a program combining an e-learning course and face-to-face training for residents is likely to result in more frequent and effective dermoscopy use by family doctors.

Vitamin D in kidney: a two-edged sword?

A wide variety of both calcium-dependent and calcium-non-dependent actions are attributed to the vitamin and hormone vitamin D. One of the most vital components of the human body, vitamin D is essential to both health and illness. It is a member of the fat-soluble secosteroid family, which is obtained from diets or direct sun exposure, which is what turns 7-hydroxycholesterol into the precursor of vitamin D. Bio-activation is an alternate phase that provides an active version of vitamin D that contributes to several notable processes like detoxification, fertility, glucose regulation, bone remodelling, and calcium regulation. Numerous research investigations examine the discernible function of vitamin D in kidney illness. The basic physiological and pathological roles of vitamin D in the kidneys of both diabetics and non-diabetics were examined in this study. In this study we analyzed a basic physiological and pathological roles of Vitamin D in kidney in terms of diabetic and non-diabetic proteinuric kidney diseases. Further research in this field is of high importance.

Effects of Eucalyptus wood and leaf litter on saproxylic insects in the southeastern United States

Although Eucalyptus is widely planted outside its native range for timber and pulp production, the effects of these exotic plantations on biodiversity relative to native semi-natural forests or plantations of native tree species remain incompletely understood. Here, we compare the diversity of saproxylic beetles (Coleoptera) and true bugs (Hemiptera) between non-native Eucalyptus benthamii Maiden and Cambage (Camden white gum) and native Pinus taeda L. (loblolly pine) stands on the upper Coastal Plain of South Carolina, U.S.A. We sampled insects emerging from logs of both species placed in both stand types after 1, 2, 6, and 12 months in the field. Beetle and true bug richness and diversity were both significantly lower from eucalypt than from pine wood. Moreover, the two communities were compositionally distinct. Whereas pine supported many species of host-specific phloeoxylophagous beetles, most species collected from eucalypts were mycophagous or predatory taxa capable of utilizing a wide range of hosts. Species richness did not differ between logs placed in eucalypt vs. pine stands but Shannon’s diversity was significantly higher in the eucalypt stands, possibly due to greater sun exposure in the latter. Contrary to a previous study, we found no support for the idea that eucalypt litter reduces the diversity of saproxylic insects. Our findings add to the growing body of evidence that non-native plantations are less favorable to biodiversity than those consisting of native tree species.

Prevalence of Vitamin D Deficiency among Patients Attending Tertiary Level Hospitals in Bangladesh: Hospital-Based Cross-Sectional Study

Introduction: Vitamin D (Vit D) is essential for calcium and phosphate homeostasis, critical for bone growth and remodeling. Its deficiency leads to conditions like osteomalacia and rickets, with adverse effects on osteoporosis, growth, and skeletal health. This study aimed to assess Vitamin D Deficiency prevalence among patients in Bangladeshi tertiary-level hospitals. Materials and Methods: A prospective cross-sectional study was conducted from January to December 2019 at Cumilla Medical College Hospital and Central Medical College Hospital. We enrolled 1250 patients meeting inclusion criteria and collected data via a pre-designed questionnaire. Results: Most participants (31.8%) were aged 31-40, with a mean age of 37.31±13.37. Male patients constituted 53.3%, and 46.7% were female. Rural residents accounted for 52.6%, while 25.8% lived in urban areas, and the rest abroad, mainly the Middle East. The majority (88.5%) belonged to middle-class families, and only 1.5% reported sufficient sun exposure. Strikingly, 54.2% were Vitamin D deficient, 40% had insufficient levels, and only 6.4% had adequate Vit D. Conclusion: This study highlights a significant prevalence of Vitamin D deficiency among patients in Bangladeshi tertiary hospitals. The data underscore the urgent need for healthcare authorities to address this public health concern. Policymakers and healthcare providers should be aware of the potential long-term health consequences of Vitamin D deficiency, emphasizing the importance of strategies to promote adequate Vit D levels in the population. Medicine Today 2023 Vol.36 (1): 17-22

Legislative review and recommendations for improving sun protection in schools.

Sun exposure in schools can account for a large portion of childhood sun exposure before the age of 20 years, yet legislation in the United States is lacking to properly protect children. Schools serve as a foundational resource to introduce and implement sun-safe practices in the youth population. Federal and state legislation relating to the access of sunscreen, sun-protective apparel, and shade was reviewed via the website LegiScan.com. At the time of publication, only 25 states have legislation in place that addresses and allows sunscreen to be used in school, given its classification as an over-the-counter medication. No state has implemented legislation allowing sunglasses to be worn in school, and only two states have laws explicitly allowing hats and other sun-protective apparel at schools. In addition, the provision of shade is addressed in four states. With a significant portion of sun exposure occurring at schools, state and federal legislation must address sun protection for students, opening the door for expanded access and additional research related to skin cancer prevention.

Attitudes and behaviors regarding sun exposure in Japan compared to Europe and North America.

The objective of our study was to assess the attitudes and behaviors in Japan regarding sun exposure and compare them to those in Europe and North America. The study population was a representative sample of individuals aged >18 years from Ipsos panels in Japan (N = 1000), North America (N = 1000), and Europe (N = 6000) using the quota method. Questionnaires covered habits, practices, and perceptions regarding sun exposure. Results revealed that the majority of people (80.1%) believed that the sun gives them energy, and 61.1% considered that being tanned made them look healthier. However, there was a significant difference between men and women regarding the appeal of tanned skin, with 54.95% of men versus 34.67% (p < 0.001) of women seeing a tan as an aesthetic asset. People aged <40 years were less likely to find a tan attractive (30.3%) compared to those aged ≥40 years (48.9%) (p < 0.001). Of those questioned, 45.70% of used sunscreen with a much higher use among women (70.10%) than men (18.74%) (p < 0.001). Almost 54% of people said they stayed in the shade to protect themselves from the sun with this behavior being more prevalent among women (67.05%) and fair-skinned individuals (56.13%). Fear of the risks of sun exposure was more common among women, with 84.8% fearing premature skin aging, compared to 71.8% of men (p < 0.001). In Japan, 44.30% of those questioned said tanned skin was attractive (p < 0.001); for Europeans and North Americans the proportions were 81.1% and 77.6%, respectively. Only a quarter (25.80%) thought it essential to return from vacation with a tan. On the other hand, Europeans showed a strong recognition of the energy the sun brings (83.18%), and widely believed that tanned skin is attractive (82.32%) and healthy (73.15%). In North America, attitudes were similar to those in Europe regarding the attractiveness of tanned skin (77.65%) and the importance of returning tanned from vacation (48.15%). Compared to Europeans and North Americans, the Japanese seemed to be more cautious about sun-induced hazards and considered lighter skin to be more attractive.

Understanding thermal justice and systemic cooling poverty from the margins: intersectional perspectives from Rio de Janeiro

ABSTRACT Heatwaves, which are escalating in frequency, duration and intensity, have prompted governments worldwide to issue vital health warnings to protect populations. These include urging individuals to stay cool, hydrated, avoid direct sun exposure and minimise strenuous activities. Regrettably, a significant segment of the population faces substantial challenges in accessing these crucial recommendations due to a range of issues termed “systemic cooling poverty”. Systemic cooling poverty encompasses intricate layers of physical, social and intangible infrastructural deficiencies, impeding the provision of essential services necessary to ensure thermal safety during extreme heat episodes. Through an intersectional mixed-method examination, this study brings empirical evidence of the structural factors that exacerbate inequalities in attaining thermal safety among the African–Brazilian community, LGBTQI+ and disabled, living in two favelas in Rio de Janeiro. By shedding light on these lived experiences of cooling poverty, we contribute to the understanding of targeted interventions and policy measures that can alleviate the impacts of extreme heat and safeguard public health and well-being as temperatures rise.

A causal analysis of the relationship between exposure to sunlight and colorectal cancer risk: A Mendelian randomization study.

Several observational studies have found that exposure to sunlight reduces the risk of colorectal cancer (CRC). However, sun exposure remains ambiguous in its relationship to CRC. We carried out a Mendelian randomization (MR) study to explore the potential associations between them. We examined the exposure to sunlight summary statistics of the UK Biobank Consortium using a 2-sample MR analysis. Using data from the FinnGen consortium, we derived summary statistics for CRC. We conducted our analysis with various methods, incorporating inverse variance weighted (IVW) along with 4 other approaches. A Cochran Q statistic was used to measure the heterogeneity of instrumental variables (IVs). We screened 133 single nucleotide polymorphisms (SNPs) (time spent outdoors in summer), 41 SNPs (time spent outdoors in winter), and 35 SNPs (frequency of solarium/sunlamp use) representing sunlight exposure for MR analysis. All selected SNPs had an F-statistic >20, indicating that IVs did not weakly bias the results. The summer outdoor activity trait exhibited significant heterogeneity (Cochran Q statistic = 183.795, P = .002 < 0.05), but we found no horizontal polymorphisms or significant heterogeneity for the other exposure traits. According to IVW estimates, no causal association exists between time spent outdoors in summer and CRC (Odds Ratio, OR = 0.735, 95% confidence interval, CI = 0.494-1.017, P = .128 > 0.017). No causal relationship existed between time spent outdoors in winter and CRC, as indicated by Bonferroni-corrected adjusted p-values. The OR was 0.877 with a 95% CI of 0.334-2.299, and the P value was .789, more significant than the significance threshold of 0.017. The solarium/sunlamp use frequency was not associated with CRC (OR = 1.567, 95%CI = 0.243-10.119, P = .637 > .017). Also, an IVW with random effects was applied to determine the causal relationship between summer outdoor time and CRC. No causal association between summer outdoor time and CRC was found (OR = 0.735, 95% CI = 0.494-1.017, P = .128 > .017). Additionally, 4 additional analyses yielded similar results. The findings of our study suggest that exposure to sunlight may reduce CRC risk, but the causal relationship remains unsolved. There is no evidence to suggest that exposure to sunlight prevents CRC. Randomized, controlled trials are needed to determine whether sunlight exposure protects against CRC.

A Practical Algorithm for Integrating Skincare to Improve Patient Outcomes and Satisfaction With Energy-Based Dermatologic Procedures.

Medical aesthetic procedures for facial antiaging with laser and energy-based devices (EBDs) are rapidly increasing, but standards integrating skincare before, during, and after these treatments are lacking. The algorithm for integrated skin care for facial antiaging treatment with EBDs aims to stimulate healing, reduce downtime, and improve comfort and treatment outcomes. A panel of 8 global physicians employed a modified Delphi method and reached a consensus on the algorithm integrating skincare based on the best available evidence, the panel's clinical experience, and opinions. The algorithm has a pretreatment (starts 2 - 4 weeks before the procedure) and treatment (day of treatment) section, followed by care after the procedure (0 - 7 days) and follow-up care (1 - 4 weeks after the procedure or ongoing). Applying a broad-spectrum sunscreen with an SPF 50 or higher, combined with protective measures such as wearing a wide-brimmed hat and sunglasses, is recommended to protect the face from sun exposure. Dyschromia is a significant concern for those with skin of color (SOC). Clinicians may recommend skincare using a gentle cleanser and moisturizer containing vitamins C and E, retinoid, or other ingredients such as niacinamide, kojic acid, licorice root extract, azelaic acid, and tranexamic acid, depending on the patient's facial skin condition. Medical aesthetic procedures for facial antiaging with EBDs integrating skincare or topical treatments may improve outcomes and patient satisfaction. Topical antioxidants and free radical quenchers can combat photodamage and may offer a safe alternative to topical hydroquinone.&nbsp; J Drugs Dermatol. 2024;23(5):353-359.&nbsp; &nbsp;&nbsp; doi:10.36849/JDD.8092.

Photoprotection and dermatological profile of persons with albinism in Plateau state, Nigeria: findings from a collaborative awareness and screening outreach program

Introduction As a result of genetically being deficient of melanin, albinos are particularly susceptible to skin damage from ultraviolet rays leading to photodermatoses such as sunburns, dermatoheliosis, and cutaneous cancers. These negatively affects quality of life and cause premature death. Little is known of the photoprotective measures available to and dermatological profile of persons with albinism in Plateau state, North Central Nigeria. Objective To describe the dermatological profile of albinos in Plateau state, Nigeria, photo exposure levels, photoprotection strategies, and factors associated with presence of photodermatoses. Patients and methods Consenting individuals with albinism attending the sensitization event hosted by the Centre for Albinism Right and Empowerment Network were recruited. Demographic information, occupational history, solar exposure, photoprotective practices, and perceived sun exposure were all documented using semistructured questionnaires. Physical and dermatological examination, dermoscopy, and laboratory investigations were used to make diagnosis. Statistical package for social sciences, version 26, was used to carry out univariate and bivariate analysis. Results While a wide spectrum of skin diseases was observed among the 59 albinos that participated. Photodermatoses were three times more than nonphotodermatoses. The commonest photodermatoses were solar elastosis (55.9%), solar lentigines (44.1%), actinic keratosis (27.1%), and sunburn (25.4%). Skin cancers affected 10.2% of all patients and 16.6% of persons more than or equal to 20 years. Generally, the presence of photodermatoses was associated with age and occupation while actinic keratotic changes specifically was associated with living in rural areas (P=0.035). Despite this, only seven (11.9%) owned sunscreen at the time of study with more than a third (35.2%) being ignorant of existence of sunscreen lotions. Conclusion Continuous multifaceted programs that involve tracking, education, prevention, early detection, and treatment of photodermatoses will be planned to be targeted towards persons with albinism living in Plateau state.

Partial substitution of fish meal by biofloc meal in diets for Nile tilapia Oreochromis niloticus

The effect of a partial substitute of fish meal by biofloc meal on the growth and survival of fry Nile tilapia Oreochromis niloticus was evaluated over nine weeks. Two biofloc meals were obtained by drying them in two processes: A) sun exposure and B) convection oven. A randomized design of eight isonitrogenous (40%) and isoenergetic (17 kJ g-1) diets was used, where 5, 10, 15, and 20% of the fish meal was substituted for the two biofloc meals. The nutritional study was conducted in a recirculating aquaculture system with Nile tilapia fry (initial weight: 0.64 ± 0.16 g). The survival range was similar in all treatments and higher than 97%. Tilapia fed with the treatments A5, A10, B5, and B10 of substitution of biofloc meal showed similar and significantly better final weight, individual weight gain, specific growth rate, and condition factor than A15, A20, B15, and B20 treatments; as well as efficiency of use of the feed: protein efficiency ratio, carcass nitrogen deposition, apparent nitrogen utilization, and apparent digestibility. Therefore, these results suggest that biofloc meal is possible in diets for tilapia, thus reducing the need for fishmeal as the main source of protein in the diet.

Design and analysis of 1.0 KVA grid-connected micro-grid PV-Systems for a residential setting in Delta State, Nigeria

The design and analysis of the 1.0 KVA solar systems was based on a thorough load assessment, precise calculation of required solar panel quantity, proper battery selection and appropriate inverter sizing. The purchase included a high-quality complete solar panel with an impressive rating of 180 W, along with two dependable 200 Ah solar batteries, a reliable 800 W inverter and a durable charge controller. These elements were meticulously put together with essential protective mechanisms such as cut out switches to ensure optimal performance and safety standards for the anticipated power output of 1.0 KVA. To optimize sun exposure for efficient energy collection, the strategic installation of the solar power consist of 6 x 180 W solar panel,2 x 200Ah battery connected in parallel and 1.0 KVA power inverter. Based on the design analysis, this well-planned setup is expected to effectively fulfill all electrical requirements even in situations without access to central power supply, presenting itself as a dependable and sustainable solution for off-grid or unreliable power scenarios.

Formulation and Evaluation of Herbal Sunscreen Utilizing Blue Pea Flower Extract

This thesis presents the formulation and evaluation of a novel herbal sunscreen incorporating Blue Pea Flower (Clitoria ternatea) extract as the primary active ingredient. With increasing concerns about the adverse effects of synthetic sunscreens and the growing interest in natural alternatives, the study aims to explore the photoprotective properties of Blue Pea Flower extract, known for its rich anthocyanin and antioxidant content. The research begins with the extraction of Blue Pea Flower bioactive compounds through optimized solvent extraction methods. The formulated herbal sunscreen is developed by incorporating the extract into a suitable base, considering stability, safety, and efficacy. Key evaluation parameters include in vitro Sun Protection Factor (SPF) determination, photostability studies, and assessments of skin compatibility. Characterization of the Blue Pea Flower extract reveals essential bioactive compounds, establishing a foundation for understanding its potential benefits. The herbal sunscreen's physical characteristics and stability are analyzed to ensure a reliable and effective formulation. In vitro SPF testing assesses the photoprotective efficacy, while photostability studies gauge the product's robustness under sun exposure conditions. Safety evaluations, including skin irritation tests and biocompatibility studies, contribute crucial data on the product's safety profile. The results provide insights into the effectiveness of Blue Pea Flower extract as a natural photoprotective agent and the overall suitability of the herbal sunscreen formulation. Comparisons with synthetic sunscreens highlight the potential advantages of the herbal formulation in terms of efficacy and safety. Recommendations for formulation optimization and future research directions are discussed, emphasizing the significance of eco-friendly and sustainable alternatives in the sunscreen industry. In conclusion, this research offers a comprehensive exploration of Blue Pea Flower extract's potential in herbal sunscreen formulations. The findings contribute to the understanding of natural photoprotective agents, fostering the development of safer and environmentally conscious sun protection products.

Metastatic patterns and treatment options for head and neck cutaneous squamous cell carcinoma (Review).

According to current predictions, one-fifth of all Americans will develop skin cancer during their lifetime. Cutaneous squamous cell carcinoma (cSCC) most commonly occurs in the head and neck region, which is the area of the body with the highest level of sun exposure. High-risk head and neck cSCC (HNcSCC) is a broad category with numerous high-risk factors that are associated with unfavorable results. In cSCC staging systems, clinical and tumor traits that are likely to result in poor outcomes are identified. Metastasis occurs in ~2.5% of patients with cSCC, most often in the local lymph nodes, and there is some indication that lymph node metastasis has a distinct pattern based on the tumor site. Current findings on tumor molecular targets have suggested the use of systemic treatments, particularly immunotherapy (such as cemiplimab, pembrolizumab and nivolumab), over radiotherapy or chemotherapy for this type of metastasis. However, when used simultaneously with immunotherapy, radiotherapy may be beneficial in the treatment of metastatic HNcSCC by improving the efficacy of immunotherapy. The present review aims to assess the existing literature on metastatic HNcSCC pathways and treatment options, in order to define current and future directions. Notably, there is an urgent need to identify patients who may benefit from local or systemic cancer treatments. The treatment of lymph node metastasis presents a therapeutic challenge and requires comprehensive management.

Knowledge, Attitude, and Practice (KAP) towards Vitamin D Deficiency among Adult Population in Qassim, Saudi Arabia

Background Vitamin D deficiency is becoming a worrying problem in Saudi Arabia and worldwide. However, vitamin D, a fat-soluble vitamin, plays a vital role in bone health by enhancing calcium and phosphorus absorption and metabolism. Also, vitamin D deficiency is remarkably correlated with the development of neurodegenerative diseases, such as senile dementia, schizophrenia, and multiple sclerosis. Objective The objective of our study was to evaluate the vitamin D deficiency Knowledge, Attitude, and Practice (KAP) among the adult population in Qassim, Saudi Arabia. Methods A cross-sectional design study was conducted among the general population in the Qassim area from March 2022 to July 2022. Results About 99.1% of people had heard about vitamin D, and the majority were aware that sunlight is the primary source of this vitamin. Despite the fact that 72.9% of them exposed themselves to sunshine, only 46.4% of participants liked going outside in the sun. Only 13.7% of the participants believed that they receive adequate sun exposure. The majority of participants (93.1%) were aware of the significance of vitamin D for bone health, and 48.4% were aware that there is a link between vitamin D insufficiency and other disorders, such as diabetes, cardiovascular disease, and depression. Additionally, the majority of individuals (91.0%) stated sunlight to be the source of vitamin D. Conclusion The findings have revealed Saudis to have a basic understanding of vitamin D deficiency. However, they were not sufficiently informed on the consequences of vitamin D deficiency.