Search

Acrylic powder coating has excellent anti-aging function and often used as an environmentally friendly topcoat coating. In order to understand its anti-corrosion performance and anti-corrosion mechanism for the purpose of expanding its application, the corrosion behavior and mechanism of intact acrylic powder coatings in marine environment and the defect of acrylic powder coating had been investigated using CASS test, immersion test and AC impedance method. Results showed that the transparent acrylic powder coatings with a thickness of 80 μm and 120 μm respectively had a few blisters on the edge of the scratch after treated by a 240 h CASS test. For the powder coating with a thickness of 120 μm, the maximum and minimum widths of corrosion products around the scratch were about 3.5 mm and 0.5 mm respectively, and the adhesion to the surface was level 0, indicating that the coating had good CASS resistance. After an immersion of 30 d, the amount of corrosion products generated around the scratch of 120 μm coating was smaller than that of 80 μm coating, revealing that 120 μm coating had better immersion resistance. Furthermore, the EIS of scratch specimens in 0.6 mol/L NaCl solution showed that the electric double layer capacitance decreased rapidly firstly and then tended to be stable, and the corrosion rate increased with the prolonging of immersion time. The impedance of the intact acrylic powder coating decreased from about 1010～1011Ω·cm2 to 106 Ω·cm2 after an immersion in 0.6 mol/L NaCl solution for 720 h. The barrier effect of these two kinds of coatings was basically the same after a 360 h immersion. Besides, as the aluminum alloy material covered with acrylic powder coating had poor corrosion resistance, the acrylic powder coating was not suitable to be used alone as the coating system for the automobile aluminum wheel hub or the alumimum alloy material. Hence, it is recommended to use composite coating system as the coating scheme for automobile aluminum alloy wheel hub.

Learning programming challenges students who encounter difficulties such as resolving syntax and format errors. These challenges require students to invoke resilience to overcome programming problems and keep trying. In response, this study developed the programming resilience scale for university students (PRSUS). The snowball-sampling method was used to collect the data of science and engineering undergraduates, and the participants were divided into two groups (n1 = 316, n2 = 358) for an exploratory and a confirmatory factor analysis, respectively. For the PRSUS, 3 items were retained for each of 4 dimensions, namely: persistence, perceived value, difficulty cognition, and incremental belief. The reliability and validity indexes indicate the scale is reliable for measuring programming resilience. Moreover, the results showed that most undergraduates had a high level of programming resilience, and they could judge their level correctly in comparison to their peers. The study also found that, although no significant difference was found among the grade or age groups, the programming resilience of the male students was significantly better than that of the female students. The PRSUS is expected to help researchers and teachers to identify students who have difficulties learning programming and to provide early interventions to students.

Background: Vitamin E, an essential micronutrient with antioxidant potential, can dramatically reduce the cardiovascular risk in individuals with haptoglobin (Hp) 2‐2 genotype diabetes; however, the underlying mechanism remains unclear. Objective: The objective of this study is to evaluate the effect of vitamin E supplementation on high‐density lipoprotein (HDL) levels and function in individuals with diabetes stratified by Hp genotype. Methods: All relevant studies published up to May 2023 were systematically reviewed using PubMed, Cochrane Library, Web of Science, Chinese Wanfang, China Science and Technology Journal, and Chinese National Knowledge Infrastructure databases. Randomized controlled trials that evaluated the effects of vitamin E supplementation on HDL levels were included. The outcomes assessed were changes in HDL concentrations, cholesterol efflux, and HDL‐associated lipid peroxides. Results: In total, 163 publications were selected. Based on inclusion and exclusion selection and quality assessment, five studies with 463 participants were included. Vitamin E supplementation did not exert any effect on HDL levels in individuals with diabetes with any Hp genotype. Three of the five studies revealed that vitamin E improved cholesterol efflux and HDL lipid peroxides in individuals with Hp2‐2 diabetes but did not positively impact HDL function in Hp1 carriers. Conclusions: Although vitamin E supplementation did not significantly impact HDL levels in individuals with diabetes of any Hp genotype, it may improve HDL function in individuals with Hp2‐2 diabetes. These findings indicate a pharmacogenetic interaction between vitamin E and the Hp genotype on HDL function. Moreover, vitamin E supplementation may be an effective strategy for specific individuals with diabetes. [ABSTRACT FROM AUTHOR]

Byline: Hui-Min. Meng, Li-Wen. Zhang, Li. Yan, Pei-Mei. Zhou, Wen-Qin. Li Sir, A 25-year-old female presented with a 2-month history of a Blaschko-linear erythema on the forehead [Figure 1]a. The [...]

Byline: Li-Wen. Zhang, Yan. Li, Tao. Chen, Rong-Hua. Xu Sir, Trichofolliculoma is an uncommon benign follicular hamartoma that presents mostly during adulthood as an asymptomatic papule or nodule on the [...]

In the field of molecular nonequilibrium transports, physical mechanisms of multiple reaction dynamics of these systems are the core of deep understanding complex reactions and transport mechanisms. In order to explore related mechanisms, establishing multiple systems coupled with tremendous exit dynamics and studying their exit dynamics properties are quite vital. Beyond previous researches, new stochastic transport processes are emphasized here. Multiple new exit dynamic systems are established, which are motivated by the multiplicity of paths and products of real biochemical processes in organisms. In order to ensure research universality, core system modeling factors are fully considered. Countable parallel orbits, uniform connection with external sources, countable parallel orbits as subsystems in middle lattices and influences of all lattices on transport trajectories on dynamic properties are analyzed. Dynamic properties of different particles located in orbits are explored by deeply studying average exit time and time scale. Quantitative spatiotemporal impacts are extensively studied. The rationality of average exit time as a time scale in the universal exit dynamic system is proved. Main findings and fruitful results can not only serve as theoretical bases for broadening reaction path modeling, but also be helpful to support understanding nonequilibrium transport mechanisms, especially stochastic biochemical processes. [ABSTRACT FROM AUTHOR]