Enabling High Reversibility of Zn anode via Interfacial Engineering Induced by Amino acid Electrolyte Additive.

Despite possessing substantial benefits of enhanced safety and cost-effectiveness, the aqueous zinc ion batteries (AZIBs) still suffers with the critical challenges induced by inherent instability of Zn metal in aqueous electrolytes. Zn dendrites, surface passivation, and corrosion are some of the key challenges governed by water-driven side reactions in Zn anodes. Herein, a highly reversible Zn anode is demonstrated via interfacial engineering of Zn/electrolyte driven by amino acid D-Phenylalanine (DPA) additions.

Contemporary advances in photocatalytic CO reduction using single-atom catalysts supported on carbon-based materials.

The persistent issue of CO emissions and their subsequent impact on the Earth's atmosphere can be effectively addressed through the utilization of efficient photocatalysts. Employing a sustainable carbon cycle via photocatalysis presents a promising technology for simultaneously managing the greenhouse effect and the energy dilemma. However, the efficiency of energy conversion encounters limitations due to inadequate carrier utilization and a deficiency of reactive sites.

Evaluation of the Dielectric and Insulating Properties of Newly Synthesized Ethylene/1-Hexene/4-Vinylcyclohexene Terpolymers.

Terpolymerizations of newly synthesized ethylene (E), vinylcyclohexene (VCH), and 1-hexene were carried out with symmetrical metallocene catalysts -MeSi(2-Me-4-Ph-Ind)ZrCl (catalyst A) and -Et(Ind)ZrCl (catalyst B). X-ray diffractometry (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), high-temperature gel permeation chromatography (GPC), and nuclear magnetic resonance (NMR) spectroscopy were used to evaluate the behavior and microstructure of the polymers. The activity of catalyst B was 1.

Sulfur doped FeNC catalysts derived from Dual-Ligand zeolitic imidazolate framework for the oxygen reduction reaction.

Iron-nitrogen-carbon (FeNC) catalysts derived from zeolitic-imidazolate frameworks (ZIFs) are worldwide accepted to be the most promising candidates for the oxygen reduction reaction (ORR), but the insufficient stability, the low FeN exposure and poor density restrict their ORR activity. Here, we demonstrate a strategy to synthesize FeN sites embedded in a micro/mesoporous N, S co-doped graphitic carbon (FeNC/MUS) by tuning the ligand linkers via the addition of 2-undecylimidazole as a co-ligand in ZIF precursors, and optimizing the electronic structure of Fe center by an in-situ addition of thiourea molecules as sulfur (S) source. 2-undecylimidazole offered an open porous structure to incorporate more FeN, while the S-doping increased the density of FeN.

Dual plasmonic Au and TiN cocatalysts to boost photocatalytic hydrogen evolution.

Employing a suitable cocatalyst is very important to improve photocatalytic H evolution activity. Herein, two plasmonic cocatalysts, Au nanoparticles and TiN nanoparticles were in-situ coupled over the g-CN nanotube to form a ternary 0D/0D/1D Au/TiN/g-CN composite via a successive thermal polycondensation and chemical reduction method. The g-CN nanotube acted as a support for the growth of Au and TiN nanoparticles, leading to intimate contact between g-CN nanotube with Au nanoparticles and TiN nanoparticles.

Mechanical colon cleansing for screening colonoscopy: A randomized controlled trial.

Objective: Effective screening colonoscopy depends on the quality of colon preparation. This study aimed to compare pulsed irrigation evacuation (PIE), polyethylene glycol (PEG) and sodium phosphate colon preparations.

Methods: Outpatients at a VA hospital were randomized using sealed envelopes.

Endoscopic ultrasound-guided fine-needle aspiration with on-site cytopathology versus core biopsy: a comparison of both techniques performed at the same endoscopic session.

Background: Endoscopic ultrasound (EUS)-guided fine needle aspiration (FNA) with bedside cytopathology is the gold standard for assessment of pancreatic, subepithelial, and other lesions in close proximity to the gastrointestinal tract, but it is time-consuming, has certain diagnostic limitations, and bedside cytopathology is not widely available.

Aims: The goal of this study is to compare the diagnostic yield of EUS-guided FNA with on-site cytopathology and EUS-guided core biopsy.

Methods: Twenty-six patients with gastrointestinal mass lesions requiring biopsy at a tertiary medical center were included in this retrospective analysis of a prospective cohort.

Trends in endoscopic retrograde cholangiopancreatography in children within the United States, 2000-2009.

We investigated the volume of endoscopic retrograde cholangiopancreatographies (ERCPs) performed in hospitalized children in the United States using a nationwide healthcare administrative database for the years 2000 to 2009. A total of 22,153 cases of ERCP were identified: 6372 diagnostic and 17,314 therapeutic (1533 cases were recorded as undergoing both types during a single hospitalization). The number of ERCPs increased from 5337 to 6733 per year; diagnostic ERCPs decreased 43% and therapeutic increased 69% (significant decreasing trends for diagnostic and increasing for therapeutic ERCPs, P<0.

Capsule endoscopy for screening for short-segment Barrett's esophagus.

Background: The rise in the incidence of esophageal adenocarcinoma has led to the development of new methods to screen for the precursor lesion, Barrett's esophagus.

Aim: To evaluate the potential role of esophageal capsule endoscopy in identifying the presence of short-segment Barrett's esophagus.

Methods: Patients with biopsy-proven short-segment Barrett's esophagus underwent esophageal capsule endoscopy.

Approach to the patient who has suspected acute bacterial cholangitis.

Table 4 gives summary recommendations concerning the major decisions that are related to the diagnosis and management of suspected acute bacterial cholangitis. All of these decisions have to be made within the context of disease severity, degree of diagnostic uncertainty, and associated comorbidity. Although these recommendations are based on evidence, there are few randomized controlled trials.