Journals@UC (University of Cincinnati)
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Gender Differences in Muscle Oxygenation Recovery Following Intermittent Cycling Exercise
No full textRecord ID: 285
Award(s): Excellence in Undergraduate Research Mentorship
Program Affiliation: Capstone
Presentation Type: Poster
Abstract: Differences in fatiguability between human males and females following repeated cycling power outputs has been documented. However, potential differences in muscle oxygenation recovery levels as a potential explanation has not been measured. Understanding differences between male and female muscle oxygenation recovery profiles would be beneficial in establishing both rehabilitation treatment and athletic performance protocols. We hypothesize that females will recover muscle oxygenation levels more robustly than males following 4 x 60s maximal effort cycling bouts with 30s recovery between bouts. Subjects participated in a single day session that included the following: A 4-6 minute warm up on the cycle ergometer (Wahoo KICKR). Four, one-minute maximal effort cycling bouts separated by 30s of recovery between. At the completion of the 4th bout, subjects remained seated on the cycle ergometer for 3 minutes while oxygen recovery levels (Moxy Oxygen Monitor) and blood lactate levels (Lactate Plus) were measured. Heart Rate and Power output were also recorded. Results are pending, but we expect that females will have an enhanced recovery profile compared to males participating in the same exercise. 
DIVERSITY: Delicate and Influential Variables Enhancing or Regressing Social and Emotional Development
No full textRecord ID: 50
Award(s): Excellence in Undergraduate Research Mentorship
Program Affiliation: NA
Presentation Type: Video
Abstract: This presentation will explore the diverse needs of children aged 5-12 years who have at least one parent/caregiver seeking treatment for a substance use disorder. First, an analysis of peer-reviewed research and scholarly articles published in the past five years will be conducted. Abstracts will be reviewed to determine if manuscripts meet criteria by addressing children\u27s socio-emotional development (aged 5-12). Next, information on the methods and outcomes of studies will be examined, and results will be synthesized. Finally, we will present our findings: interpreting outcome data and discussing supportive, evidence-based interventions to improve the socio-emotional functioning of young children whose parents face addiction. We will articulate concepts for interventions and techniques to improve socio-emotional development and functioning for children. We will present innovative ideas to support young children and suggest designs for health professionals and substance use counselors who serve this vulnerable population. This subject is important because children of parents dealing with substance use disorders can experience a range of socio-emotional difficulties. Through examination of the latest studies, we will enlighten practitioners and researchers, identifying practical ideas for use by substance use counselors. The insights we share will go beyond theory-they are assured to inform interventions that could significantly improve youth\u27s social and emotional development. We aim to convert research into practical, knowledgeable, tangible, and enriching interventions professionals can use to support children. Research on interventions to improve child functioning is critical, as there is potential to change lives forever. functioning is critical, as there is potential to change lives forever. 
Sustainable Finished Leather Preservation: Part II - Wattle Tannin Capped Copper Nanoparticles
No full textPart 1 of the current paper described the green synthesis of myrobalan capped copper nanoparticles for the preservation of the finished leather. In Part II of the current study, Copper Nanoparticles (CuNPs) were synthesized using green synthesis with wattle (tannin) extract as a reducing agent. Green synthesis is the preferred approach for the synthesis of metal nanoparticles due to its eco-friendly and cost-effectiveness for the preservation of finished leather. To improve the antibacterial qualities of leather with different types of finishes, the resin finished leather was coated with synthesized wattle copper nanoparticles (W-CuNPs). The chemical constituents of wattle induce the reduction of Cu2+ ions to CuNPs with the capping process and also remain as a stabilizing agent for the capping process. The formation of W-CuNPs was confirmed by UV-Spectroscopy at an absorbance of 467 nm. The identified functional groups such as -OH, C=C, and C-N were analyzed by Fourier transform infrared spectrum (FT-IR) which are responsible for the reduction and stabilization of copper nanoparticles. The spherical shape of the nanoparticles was ascertained by Scanning Electron Microscope (SEM), whereas Energy dispersive X-ray (EDX) studies confirmed the presence of copper with 65%. The average particle size of W-CuNPs was found to be 96 nm. The zeta potential value of -24 mv affirmed the stability of the W-CuNPs. The maximum zone of inhibition was 12 mm against Gram-positive (Bacillus subtilis) and 11 mm against Gram-negative (Serratia marcescens) bacteria on W-CuNPs coated finished leather, which exhibits strong antimicrobial activity. Hence, CuNPs synthesized by wattle extract have the potential to preserve the finished leather and its products as an antibacterial agent
Influence of Different Products on Wet Finishing for Leather Properties and Waste Generation
No full textLeather is widely used for various applications. The processing involves a series of steps in which chemical processes and mechanical operations are carried out, with the addition of a series of products. Among the performance and quality parameters of the leather produced are the chemical and physical properties. The quality of the leather and the product obtained is influenced by its processing and the products used. Several studies are found in the literature on the effect of processing on leather properties. The present study brings the results of the influence of different products used in retanning, dyeing and fatliquoring (wet finishing) on the final properties of the leather. Physical tests of resistance to tearing, cracking and distension of the grain, the functional groups present in its structure, the thermal stability by DSC and TGA tests, dye uptake rate percentage and the remaining concentration of dye in the solution were used to evaluate the influence of different products on leather properties. It was observed that the parameter that influenced the applied force and the distension of the grain of the leather was the type of retanning agent used; the greater resistance to distension was obtained by Tara retanned leathers. As for the degree of dye uptake rate and remaining concentration of dye in the effluent, they were not affected by the studied parameters and all hides showed similar dye uptake. Regarding tear resistance, the type of grease was the parameter that had a significant effect on leather, higher resistance values were observed for leather greased with Coripol. The novelty of the work is in measuring how different dyeing, retanning and greasing products influence the properties of the final product, which is an advance towards greater cost-benefit in the choice of products to be used in the process
Microencapsulation of Essential Oils for Antimicrobial Foot Bed
No full textThe present study emphasizes the microencapsulation of mixture of three essential oils and explores its application in footwear industry. In brief, essential oils of Thymus zygis, Citrus limoniumand Cinnamomum cassia microencapsulated as per the standard protocol followed elsewhere. The obtained microcapsules characterized, fused on to the foot bed materials of footwear using hand sprayer and assessed the antimicrobial property after airdrying. The foot bed material chosen for the present study includes leather, textile and polymer. Representative standard Gram -positive and Gram – negative bacterial species, and few of the fungal species isolated from leather samples are the test organisms used in the present study. Results revealed the size of the microcapsules as 25-60 nm. Optical and Scanning electron micrographs suggested the spherical nature of the capsules. Antibacterial and antifungal activity studies on microcapsules as such and foot bed materials before and after the incorporation of microcapsules infers the complete inhibition of microbial growth in microcapsules incorporated foot bed materials. The stability studies on the spray coating of microcapsules on to the foot bed materials reveal more than six months stability. SEM analysis of fungal species before and after exposure to microcapsules suggested the thinning of filaments and the natural mechanism of growth inhibition. In conclusion, coating of microencapsulated essential oils adds antimicrobial property to the foot bed materials
I PointNet++: Improved PointNet++ for Segmentation and Localization of Leather Grasp Points
No full textIn order to achieve accurate identification and positioning of leather grasp points during the process of robot grasp and spreading leather, this paper proposes a leather grasp point segmentation and positioning method based on improved PointNet++(IPointNet++). Taking leather in its natural falling state as the research object, a depth camera is used to collect point cloud data of the leather. Firstly, the preprocessing of leather point clouds is completed by removing background point clouds based on PassThroughFilter and eliminating noise based on Statistics Filter. Secondly, the octree sampling method is used to replace the farthest point sampling method of the original PointNet++, which is adapted to the nonrigid deformation characteristics of the leather itself. Thereby, the entire leather is divided into two parts: the main body and the grasp area. Lastly, the three-dimensional coordinates of the leather grasp points are obtained by solving the centroid of the point cloud data in the leather grasp area grasp. In the segmentation experiments, the improved PointNet++ has raised the mIoU by 11.8% and 2.5% comparing with PointNet and PointNet++ respectively, and the OA by 6.1% and 1.1%. In the grasp experiments, the success rate of leather grasp points identification grasp is 93.33%, and the success grasp rate grasp is 82.14%. The experimental results show that the proposed method has higher segmentation accuracy and good applicability
Council Conference Call Minutes
No full textAmerican Leather Chemists Association
Council Conference Call Minutes: April 11, 2024 | 2pm Est. 
Soft And Non-Sticky Water-Based PUA Composite for Soft Leather Finishing
No full textA soft but non-sticking composite resin, built on waterbased polyurethane (WPU) and polyacrylic resin (PA) with interpenetrating network (IPN) structures was prepared. Specifically, polyacrylic resin emulsions with different cross-linking agents (glycerol methacrylate (GMA), vinyltrimethoxysilane (KH171)) were fabricated first and used as mother liquor, then waterborne polyurethane pre-polymer modified by polydimethylsiloxane (PDMS) to get a hydrophobic surface was dispersed into PA, after post-chain-extension by poly(ether-amine) (D-230) and N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxy silane (KH-602), two kinds of WPU/PA (WPUA) interpenetrating network emulsions were achieved. Thermodynamic compatibility, mechanical properties, anti-sticking performance, and other properties such as glass transition temperature and hydrolysis resistance of WPUAs were investigated in detail. The as-prepared WPUAs exhibits a glass transition temperature close to each other, a wide latex particle size distribution, high light transmittance, and enhanced hydrolysis resistance, indicating the formation of interpenetrating and crosslinking structures between the two components. Benefiting from two polymer chains intertwining and flexible cross-linking, WPUA films exhibited high elasticity (>800%) and low modulus at 100% tension (0.4 MPa), showing desirable flexibility. Under 80°C and 2 kg hot pressing, the leather coating can be easily peeled off, showing excellent anti-sticky propertie
