Phase Change-Mediated Capture of Carbon Dioxide from Air with a Molecular Triamine Network Solid.

The efficient removal of CO from exhaust streams and even directly from air is necessary to forestall climate change, lending urgency to the search for new materials that can rapidly capture CO at high capacity. The recent discovery that diamine-appended metal-organic frameworks can exhibit cooperative CO uptake via the formation of ammonium carbamate chains begs the question of whether simple organic polyamine molecules could be designed to achieve a similar switch-like behavior with even higher separation capacities. Here, we present a solid molecular triamine, 1,3,5-tris(aminomethyl)benzene (TriH), that rapidly captures large quantities of CO upon exposure to humid air to form the porous, crystalline, ammonium carbamate network solid TriH(CO)·HO (TriHCO).

Attentional biases for dynamic stimuli in emerging adults with anxiety: A preliminary eye-tracking study.

While attentional biases towards negative stimuli have previously been linked to the development and maintenance of anxiety disorders, a current limitation of this research involves the use of static images for stimuli, as they cannot adequately depict the dynamic nature of real-life interactions. Since attentional biases in those with elevated anxiety remain understudied using more naturalistic stimuli, such as dynamic social videos, the purpose of this explorative study was to use novel dynamic stimuli and modern eye-tracking equipment to further investigate negative attentional biases in anxious emerging, female adults. Non-clinical participants (N = 62; mean age = 20.

Reversible CO2 Hydrogenation, Neutron Crystallography, and Hydride Reactivity of a Triiridium Heptahydride Complex.

We report the structure, reactivity, and catalytic utility of a triiridium complex, [Ir3H6(µ3-H)(PN)3]2+ (2-H, PN = (2-pyridyl)CH2PBut2). Despite its unusual stability to unsaturated organics, electrophiles, and even CF3SO3D, we find that complex 2-H catalyzes hydrogenation of CO2 to formate (TONIr = 9,600) and reverse formic acid dehydrogenation (TONIr = 54,400). The hydrogenation operates via a reactive intermediate [Ir3H4(µ-H)4(PN)3]+ (5).

Ventilator Liberation Practices in Pediatric Cardiac Critical Care.

Mechanical ventilation is common in critically ill children with cardiac disease, but literature focused on ventilator liberation practices for this unique pediatric subpopulation is limited. We aimed to describe current ventilator liberation practices in critically ill children with cardiac disease. Through the Pediatric Cardiac Critical Care Consortium, an electronic survey was distributed to pediatric ICU attending physicians caring for patients with cardiac disease evaluating institutional protocols and individual practices around ventilator liberation including criteria for extubation readiness testing (ERT), ERT components, spontaneous breathing trial (SBT) method and duration, timing of extubation, and postextubation respiratory support.

Characterization of artificial intelligence performance for lesion detection using synthetic lesions in PET imaging.

Background: The use of artificial intelligence (AI) for lesion detection has witnessed increased interest and efforts in recent years. Meanwhile, task-specific characterization and comparison of AI performance is lacking as supportive evidence prior to its implementation in the clinical setting.

Purpose: To evaluate the use of synthetic lesions in positron emission tomography (PET) and computed tomography (CT) to characterize the performance of lesion detection AI in terms of their limits of detection.