Effects of Polyol Types on Underwater Curing Properties of Polyurethane.

This study aims to develop castable polyurethane suitable for applications on wet substrates or underwater construction. Polyurethanes were synthesized using various polyols with similar hydroxyl values, including poly(tetrahydrofuran) polyol, polyester polyol, castor oil-modified polyol, soybean oil-modified polyol, and cashew nut shell oil-modified polyol. The corresponding polyurethane curing products were evaluated for their underwater curing characteristics by volume expansion ratios and adhesion strength on dry and wet substrates, combined with analyses of reaction exothermic behavior, wetting properties on dry and wet substrates, interfacial tension, and microstructure characterization from the perspectives of reaction activity and water solubility.

Nonlinear optics properties of Ni-SbSe nanofilms in the near-infrared region.

is an emerging material in recent years, and past studies have shown that it has good optoelectronic properties when doped with metals. In this paper, pure films and - films with different doping contents (1, 2, 3 W) were prepared by magnetron sputtering technology. The nonlinear optics properties of the sample films were investigated using femtosecond (fs) -scan technology under 800 nm.

Metabolomics study of fibroblasts damaged by UVB and BaP.

We have recently shown that both UVB and BaP can induce the production of ROS, apoptosis and even cancer. However, the differences in the metabolic profiles of skin damaged by UVB, BaP or UVB combined with BaP have not been studied. Therefore, we examined the metabolic changes in the human foreskin fibroblast injured by UVB or BaP or the combination of the two, using ultra performance liquid chromatography (UPLC) coupled with quadrupole time-of-flight mass spectrometry (qTOF-MS).

Lipidomics reveals the role of glycoceramide and phosphatidylethanolamine in infantile acne.

Background: Infantile acne refers to a skin disease that usually occurs on the face from 6 weeks to 1 year old, and the etiology of infantile acne is different from that of puberty acne. The change of skin surface lipid (SSL) is an important factor in the occurrence of acne.

Objectives: Comparison of facial skin lipid changes in healthy and acne-prone infants, screening for possible groupings of substances, to explore factors associated with the development of acne in infants, such as gender and frequency of face washing.

Exploration of potential lipid biomarkers for premature canities by UPLC-QTOF-MS analyses of hair follicle roots.

Background: The rate of premature greying, referred to as canities, varies among populations, and effective treatments are lacking. However, few studies at the molecular level have been reported.

Objectives: Comparing lipid profiles of individuals with premature canities and healthy volunteers to explore the mechanism of premature canities.

Prediction of neonatal acne based on maternal lipidomic profiling.

Background: Neonatal acne occurs in the first few weeks after birth. Some lesions are more serious and leave scars. Maternal surface skin lipids (SSL) have a strong correlation with SSL of infants.

Application of lipidomics to reveal differences of facial skin surface lipids between atopic dermatitis and healthy infants.

Background: The current knowledge about potential risk factors for atopic dermatitis (AD) is primarily based on the structure and function of the stratum corneum, which is characterized by osmotic defects and abnormal antibacterial function. There are no studies on the difference between facial lipids in infants with AD and healthy infants.

Aims: We sought to explore significantly different lipid markers for infants with AD presenting with lesions and healthy infants aged 0-2 years to guide treatment strategies.