Presence of impurities of nickel and cobalt in facial cosmetic pigments and their dissolution into artificial sweat.
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ABSTRACT:
SUBMITTER: Wang X
PROVIDER: S-EPMC9826512 | biostudies-literature | 2022 Dec
REPOSITORIES: biostudies-literature
Publications
Presence of impurities of nickel and cobalt in facial cosmetic pigments and their dissolution into artificial sweat.
Wang Xuying X Hedberg Yolanda S YS Odnevall Inger I
Contact dermatitis 20220915 6
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Project description:Lithium-ion batteries are among the most important energy-storage devices. In this regard, nickel-cobalt-manganese (NCM) cathodes are widely used because of their high energy density and stability. Cu on NCM can enhance the overall performance by aiding lithium-ion transport through cation mixing; however, it leads to issues, such as internal short circuits. The precipitation pH of Cu is high, making its chemical separation from the NCM challenging. Given the impacts and the challenge of separation, an accurate quantification of the residual Cu content in the NCM cathode is essential. Inductively coupled plasma methods struggle with the accurate quantification of trace impurities in NCM owing to the high contents of material elements, leading to instrument malfunction and time-consuming labor. In this study, the introduction of electrochemical methods significantly weakened the matrix effect and facilitated the pretreatment of the solution. In particular, a thin-film electrode (TFE) made of Rh allowed quantification of the Cu present in commercial NCM powder. Cyclic voltammetry and an electrochemical quartz crystal microbalance were used to confirm the formation of two types of underpotential deposition (UPD) Cu on the Rh TFE. Square-wave voltammetry was used to analyze the kinetic differences in Cuupd and quantify trace amounts of Cu with high sensitivity. The results included a relative standard deviation of 2.54%, linear range of 13-450 ppb, and limit of detection of 3.9 ppb. The method was successfully applied to commercial NCM products, where the standard addition method determined Cu content in the range 40-60 ppb. This method provides standardized guidelines for both laboratory and industry for evaluating the effects of impurities across various NCM cathodes.
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Project description:ImportanceErosive pustular dermatosis (EPD) is a rare condition that typically affects actinically damaged skin of the scalp. Characterized by sterile pustules, erosions, and crusts, EPD is difficult to treat and heals slowly. The exact cause of EPD is unknown, although trauma is an inciting factor.ObjectiveTo describe 3 women who presented with prolonged facial erosions after cosmetic resurfacing procedures, specifically fully ablative carbon dioxide laser or medium-depth chemical peel.Design, setting, and participantsThis case series describes the clinical features, histopathological findings, laboratory results, and treatment of 3 patients with an ultimate diagnosis most consistent with facial EPD. Patients were evaluated between September 10, 2010, and May 6, 2016, in a dermatology clinic in an academic medical center. The patients were 3 women seeking diagnostic evaluation and therapeutic options for nonhealing facial erosions occurring after ablative procedures (carbon dioxide laser resurfacing or Jessner solution/trichloroacetic acid chemical peel).Main outcomes and measuresHistologic examination and wound culture from initial presentation as well as clinical follow-up documenting improvement with therapeutic interventions.ResultsAll 3 patients were women in their 50s or 60s for whom EPD was deemed to be the best diagnosis, after infection, immunobullous disorders, and other pustular dermatoses were considered. Histologic features were nonspecific. Treatment included a combination of topical and systemic therapies, such as corticosteroids, dapsone, isotretinoin, and/or antibiotics. Watchful waiting (tincture of time) appeared to be central to the healing process.Conclusions and relevanceAfter cosmetic resurfacing, patients may develop EPD isolated to the face. As a diagnosis of exclusion that should be considered in patients who have nonhealing wounds following ablative procedures, EPD is challenging to treat and may require the use of anti-inflammatory agents. Recognizing this condition is important, especially as cosmetic procedures become more widespread.
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Project description:Although it is well established that cosmetic makeup enhances perceived facial attractiveness, few studies have examined whether facial makeup modulates neural responses to face images. This study investigated behavioral and attractiveness-related brain responses to self-applied makeup, focusing on the N170, early posterior negativity, P300, and late positive potential components of event-related brain potentials. A total of 77 Japanese women participated in two experiments (N = 34 and 43 for Experiments 1 and 2, respectively). Experiment 1 assessed the effects of self-applied makeup on attractiveness-related event-related potential amplitudes using facial images during a makeup identification task in which makeup was directly relevant to task demands. Experiment 2 examined the effects of self-applied makeup using images of one's own face and another female's face when performing a gender classification task, where the presence of makeup had no explicit connection to facial gender classification. In both experiments, faces with makeup were rated as more attractive and elicited more negative early posterior negativity and more positive late positive potential components, regardless of the participant's own face or another person's face. These findings suggest that people are spontaneously motivated to pay visual attention to faces with makeup, which supports the idea that makeup adds reward value to the facial appearance of the human. Moreover, neural evidence empirically confirmed that the benefits of makeup are not just limited to how others see your face but also extend to how you see your own face.
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Project description:The use of silver nanoparticles (Ag NPs) in consumer products can result in diffuse environmental dispersion of both NPs and ionic silver. This study investigated the transformation of Ag NPs present in two consumer products (skin cream, mouth spray) in terms of release of Ag NPs and ionic silver and changes in particle size in artificial sweat and saliva solutions. Large differences in silver release were observed with the smaller sized Ag NPs in mouth spray releasing more silver compared with the Ag NPs of the skin cream. Substantial particle agglomeration took place in both artificial sweat and saliva, forming large-sized agglomerates (> 100 nm). The amount of dissolved silver in solution after 24 h was less than 10% of the total amount of Ag NPs for both products. The results show that the Ag NPs of these consumer products will largely remain as NPs even after 24 h of skin or saliva contact. The use of normalization by geometric surface area of the particles was tested as a way to compare dissolution for Ag NPs of different characteristics, including pristine, bare, as well as PVP-capped Ag NPs. Normalization of silver dissolution with the geometric surface area was shown promising, but more extensive studies are required to unambiguously conclude whether it is a way forward to enable grouping of the dissolution behavior of Ag NPs released from consumer products.
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Project description:This study responds to stringent environmental regulations and increasing focus on resource conservation by exploring economically viable refining technologies through recycling. With the rising costs of filtrate disposal, there is a significant emphasis on removing and recycling valuable constituents, particularly nickel and copper (Ni and Cu). Herein, we employ analytical techniques with the aim of investigating an alternative method for recovering Ni and other valuable metals from a nickel sulfide-fire assay filtrate using S-curve precipitation under optimal conditions. The waste from the fire assay procedure contains substantial amounts of Ni and other critical metals, with concentrations of 62.7 g/L of Ni and 3.87 g/L of Cu. Prior to precipitation, traditional solvent extraction was used for Cu extraction, selectively removed before separating primary impurities such as iron (Fe). A pivotal aspect of this research involves applying S-curve precipitation with precise parameters at different pH levels. Analytical techniques reveal a minor depletion occurs as Ni is separated from Fe at a pH of 2.5, resulting in the formation of a refined Ni stream that is then refined into a mixed hydroxide Ni(OH)2 product. The efficiency of 5,8-diethyl-7-hydroxydodecan-6-oxime (LIX 63-70) in extracting value-added metals from fire assay waste is exceptionally high, integrating recycling and repurposing of value-added base metals to promote a circular economy.
| S-EPMC10851410 | biostudies-literature
Project description: Not available
| S-EPMC9509022 | biostudies-literature
Project description:Nickel and Cobalt was applied in sublethal doses to HeoPG2 cells. RNA-seq was carried out to analyse cellular response.
2024-08-19 | E-MTAB-14292 | biostudies-arrayexpress
Project description:Ni/Co Tox
| PRJEB61118 | ENA
Project description:Thin film deposition is essential in the cosmetic industry, where formulations such as foundations and concealers rely on uniform layer formation to conceal pores and texture irregularities for a natural and even appearance. However, variations in skin topography, influenced by factors such as aging, genetics, and environmental exposure, can significantly affect the behavior of these films. Aging, in particular, leads to increased skin roughness and wrinkles, creating challenges to achieve consistent cosmetic deposition in diverse age groups. This study investigates the impact of age-related topographical changes on cosmetic thin film deposition and introduces a model for standardized, age-specific evaluation of cosmetic performance. Using X-ray microtomography, we compare skin topography from a cohort of the Korean population segmented into young and aged groups. A PDMS-based model is then constructed using these skin topographies, and thin film deposition is assessed both on human-derived skin positives and on the assembled model. This approach demonstrates the potential of artificial skin models for the precise quantification and evaluation of film coverage. In addition, we propose an improved model that incorporates key factors such as skin porosity and sebum production to increase realism. By exploring the interactions between skin morphology and cosmetic behavior, this method offers valuable insights into optimizing formulations to meet the diverse needs of consumers.
| S-EPMC11919402 | biostudies-literature
Project description:ImportanceFacial cosmetic surgery has previously focused on improvements in perceived physical attractiveness and youthfulness. However, human beings are judged throughout life based on many other characteristics and personal qualities that are conveyed by their faces.ObjectiveTo examine the association of facial cosmetic surgery in men with perceptions of attractiveness, masculinity, and personality traits.Design, setting, and participantsCohort study with retrospective evaluation by blinded raters of preoperative and postoperative photographs of 24 male patients who underwent facial cosmetic surgery between January 1, 2009, and January 31, 2016. A total of 6 surveys were constructed with 8 sets of photographs each (4 preoperative and 4 postoperative). Each of these surveys was then sent to at least 36 lay people via the web-based survey tool Survey Monkey. Additional invites were sent for individual surveys until a minimum of 24 responses were received for each survey. Preoperative and postoperative photographs of the same patient were not placed in the same survey to avoid recall bias. Anonymous raters used a 7-point Likert scale to rate their perception of each patient's personality traits (aggressiveness, extroversion, likeability, risk seeking, sociability, and trustworthiness), attractiveness, and masculinity based on photographs in their assigned survey. Raters were blinded to study intent. Data analysis was performed between August 2018 and March 2019.Main outcomes and measuresRatings of personality, attractiveness, and masculinity.ResultsThis survey study included photographs of 24 men who underwent facial cosmetic surgery; the mean (SD) age of the patients was 49.3 (16.4) years. A total of 145 participants completed the survey; the majority of respondents were men (n = 81; 56%) between the ages of 25 and 34 years (n = 116; 80%). Score increases were significant for perceived attractiveness (0.29; 95% CI, 0.13-0.46), likeability (0.41; 95% CI, 0.24-0.57), social skills (0.25; 95% CI, 0.08-0.40), and trustworthiness (0.27, 95% CI, 0.11-0.44) when evaluating all facial cosmetic procedures together (upper blepharoplasty, lower blepharoplasty, face-lift, brow-lift, neck-lift, rhinoplasty, and/or chin implant). Upper blepharoplasty was associated with positive changes in perceived likeability (0.72; 95% CI, 0.06-1.50) and trustworthiness (0.74; 95% CI, 0.22-1.25). Lower blepharoplasty was associated with decreased perception of risk seeking (-0.78; 95% CI, -1.45 to -0.10). Face-lift was associated with increased perception of likeability (0.69; 95% CI, 0.08-1.30) and trustworthiness (0.66; 95% CI, 0.05-1.27). Neck-lift was associated with increased perception of extroversion (0.60; 95% CI, 0.10-1.09) and masculinity (0.70; 95% CI, 0.21-1.19). Patients who underwent rhinoplasty had improvements in perceived attractiveness (0.51; 95% CI, 0.03-1.00) and likeability (0.40; 95% CI, 0.03-1.00). Chin augmentation did not show any significant improvements.Conclusions and relevanceThe results of this study suggest that men undergoing facial cosmetic surgery may experience changes in perceived attractiveness, masculinity, and a variety of personality traits. These findings complement those from a previous study on female patients, which together broaden the understanding of the association of cosmetic surgery with societal perceptions of persona.Level of evidenceNA.
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