Probing the Distribution and Mobility of Aminopolymers after Multiple Sorption-Regeneration Cycles: Neutron Scattering Studies.

Solid-supported amines are effective CO adsorbents capable of capturing CO from flue gas streams (10-15 vol % CO) and from ultradilute streams, such as ambient air (∼400 ppm CO). Amine sorbents have demonstrated promising performance (e.g.

Underlying Roles of Polyol Additives in Promoting CO Capture in PEI/Silica Adsorbents.

Solid-supported amines having low molecular weight branched poly(ethylenimine) (PEI) physically impregnated into porous solid supports are promising adsorbents for CO capture. Co-impregnating short-chain poly(ethylene glycol) (PEG) together with PEI alters the performance of the adsorbent, delivering improved amine efficiency (AE, mol CO sorbed/mol N) and faster CO uptake rates. To uncover the physical basis for this improved gas capture performance, we probe the distribution and mobility of the polymers in the pores via small angle neutron scattering (SANS), solid-state NMR, and molecular dynamic (MD) simulation studies.

Isomorphous Substitution in ZSM-5 in Tandem Methanol/Zeolite Catalysts for the Hydrogenation of CO to Aromatics.

Intensified reactors for conversion of CO to methanol (via hydrogenation) using metal oxide catalysts coupled with methanol conversion to aromatics in the presence of zeolites (e.g., H-ZSM-5) in a single step are investigated.

Insights into the Oxidative Degradation Mechanism of Solid Amine Sorbents for CO Capture from Air: Roles of Atmospheric Water.

Direct air capture (DAC) processes for extraction of CO from ambient air are unique among chemical processes in that they operate outdoors with minimal feed pretreatments. Here, the impact of humidity on the oxidative degradation of a prototypical solid supported amine sorbent, poly(ethylenimine) (PEI) supported on Al O , is explored in detail. By combining CO adsorption measurements, oxidative degradation rates, elemental analyses, solid-state NMR and in situ IR spectroscopic analysis in conjunction with O labeling of water, a comprehensive picture of sorbent oxidation is achieved under accelerated conditions.

Single-Walled Zeolitic Nanotubes: Advantaged Supports for Poly(ethylenimine) in CO Separation from Simulated Air and Flue Gas.

Previous research has demonstrated that amine polymers rich in primary and secondary amines supported on mesoporous substrates are effective, selective sorbent materials for removal of CO from simulated flue gas and air. Common substrates used include mesoporous alumina and silica (such as SBA-15 and MCM-41). Conventional microporous materials are generally less effective, since the pores are too small to support low volatility amines.

Vemurafenib in the Treatment of Erdheim Chester Disease: A Systematic Review.

Erdheim Chester disease (ECD) is a type of histiocytosis characterized by a variable clinical presentation. The treatment of ECD is complex and mainly unknown. We aim to conduct a literature review of the treatment of ECD and consolidate the knowledge about the most recent and updated treatment for ECD.

Use of Levodopa After a Stroke: A Systematic Review.

Stroke is a leading cause of death and disability, especially in certain ethnic groups. Impaired consciousness is a common outcome in stroke patients, serving as a predictor of prognosis and mortality. Lately, there has been increased interest in drugs such as Levodopa (LD), which have been found to promote wakefulness.

Increasing the Thickness of the Collagen Xenogeneic Matrix Prevents Early Matrix Degradation and Improves the Proliferation, Adhesion, and Viability of Human Gingival Fibroblasts and Mesenchymal Stem Cells.

Using autogenous grafts in mucogingival surgeries is related to postoperative morbidity and limited tissue availability, and thus xenogeneic matrices are increasingly used. This in vitro study evaluated the influence of xenogeneic collagen matrix thickness on cell adhesion, morphology, viability, proliferation, and matrix degradation. Matrices were divided into three groups: SLC: single layer of Lumina Coat, as commercially available (2-mm thickness); DLC: double layer of SLC (Lumina Coat); and MG: single layer of Mucograft, as commercially available (4-mm thickness).

A Simple Technique to Repair Feldspathic Porcelain Chipping in Screw-retained Implant-supported Prosthesis: A Clinical Technique.

Aim: This clinical technique report aimed to describe a composite resin repair technique performed in an implant-supported prosthesis.

Background: Veneering ceramic fracture or chipping is one of the most frequent clinical failures in dentistry. Therefore, the use of less time- and cost-consuming ceramic repair techniques is helpful in clinical practice.

Circus disaster: Case report, response, and review of injuries.

Circus acts with human artists performing acrobatic feats are a popular spectator pastime in the United States and in international venues. There is little data in the literature regarding injuries sustained during circus acts. Some injuries are minor, but others can be serious, or even fatal.

Survival of Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes on raw peanut and pecan kernels stored at -24, 4, and 22°C.

Cocktails of lawn-collected cells were used to determine the survival of Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes on the surface of raw peanut and pecan kernels. Kernels were inoculated with mixtures of four to five strains at 3 or 6 log CFU/g, dried at room temperature, and then stored at -24 ± 1, 4 ± 2, and 22 ± 1°C for 28 or 365 days. In most cases, rates of decline of the pathogens did not differ significantly between the two inoculum concentrations in the 28-day study.

Cardiology electrocardiogram overreads rarely influence patient care outcome.

Objective: The value of electrocardiogram (ECG) overreads of emergency department (ED) tracings have been questioned in the literature. This review was designed to assess the validity of this criticism.

Methods: In this university teaching hospital ED, following the normal quality assurance protocol, each abnormal ECG is reviewed the following day against the corresponding chart; and if the official reading from cardiology is discordant from the initial clinical one, the patient and/or their physician is contacted.

Disaster-related fatalities among US citizens traveling abroad.

Objective: To describe the locations and risk of death associated with natural disaster fatalities for US citizens traveling abroad.

Design, Setting, And Participants: A retrospective database review of US citizen disaster deaths occurring worldwide.

Interventions: None.

Medical support for emergency relief workers after typhoon Sudal in Yap, Micronesia.

Introduction: On 09 April 2004, Typhoon Sudal struck the Island of Yap in the Federated States of Micronesia (FSM). Over 90% of homes, public utilities, and public property were damaged or destroyed. Nearly 10% of the population was displaced to shelters, and the majority of the population was without drinking water or power.

Peer review and feedback can modify pain treatment patterns for emergency department patients with fractures.

Consecutive fracture patients presenting to an adult (AED) or pediatric trauma center (PED) or a community teaching hospital (CED) were reviewed for treatment. Physicians received individual and group feedback. Data were dichotomized by age, gender, race and insurance status.