The adsorption of methanol by a zeolitic imidazolate framework-8 (ZIF-8) nanoparticle thin film was studied in situ using temperature-programmed desorption and X-ray photoelectron spectroscopy under low-temperature, low-pressure conditions. Partial pore penetration was observed at 90 K, but upon increasing the exposure temperature of the film to 130 K pore penetration was significantly enhanced. Although many studies exist involving bulk powders, this is the first work to our knowledge that demonstrates the ability to control and monitor the entry of a molecule into a metal organic framework (MOF) film in situ using temperature. In this case, nanoparticle films of ZIF-8 were prepared and studied in ultrahigh vacuum. The ability to control and monitor surface adsorption versus pore adsorption in situ is key to future fundamental study of MOFs, for example, in the identification of active sites in reaction mechanisms.
Our aim was to explore the effect of social media face-altering programs on desire for subsequent facial plastic procedures. This was a cross-sectional survey study in two cities, incorporating participants ages 18 to 29 in undergraduate and graduate programs. Demographic and social media–specific factors were descriptively and quantitatively analyzed. Total respondents were n = 398. The use of face-enhancing Instagram filters was associated with subsequent desire to undergo facial plastic procedures (chi-square = 5.04, p < .05). History of prior psychiatric diagnosis was also independently associated with a desire to undergo facial plastic procedures (chi-square = 7.34, p < .05). The use of face-altering software on social media has a significant association with subsequent desire to undergo facial cosmetic procedures. Comorbid psychiatric disorders also independently have a significant effect on the desire to pursue such procedures. Continued studies and elucidation of these factors may benefit the facial plastic surgeon for appropriate counseling and management to optimize patient outcomes.
A 26-year-old male living with human immunodeficiency virus (HIV) and who had previously been treated for ocular syphilis presented to the Emergency Department with progressive vision loss and uveitis. The efficacy of standard management for neurosyphilis in HIV and recurrence was examined.
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