Cu Based Dilute Alloys for Tuning the C Selectivity of Electrochemical CO Reduction.

Electrochemical CO reduction is a promising technology for replacing fossil fuel feedstocks in the chemical industry but further improvements in catalyst selectivity need to be made. So far, only copper-based catalysts have shown efficient conversion of CO into the desired multi-carbon (C) products. This work explores Cu-based dilute alloys to systematically tune the energy landscape of CO electrolysis toward C products.

Scalable Gas Diffusion Electrode Fabrication for Electrochemical CO Reduction Using Physical Vapor Deposition Methods.

Electrochemical CO reduction (ECR) promises the replacement of fossil fuels as the source of feedstock chemicals and seasonal storage of renewable energy. While much progress has been made in catalyst development and electrochemical reactor design, few studies have addressed the effect of catalyst integration on device performance. Using a microfluidic gas diffusion electrolyzer, we systematically studied the effect of thickness and the morphology of electron beam (EB) and magnetron-sputtered (MS) Cu catalyst coatings on ECR performance.

Evaluating the stability and activity of dilute Cu-based alloys for electrochemical CO reduction.

Cu-based catalysts currently offer the most promising route to actively and selectively produce value-added chemicals via electrochemical reduction of CO (eCOR); yet further improvements are required for their wide-scale deployment in carbon mitigation efforts. Here, we systematically investigate a family of dilute Cu-based alloys to explore their viability as active and selective catalysts for eCOR through a combined theoretical-experimental approach. Using a quantum-classical modeling approach that accounts for dynamic solvation effects, we assess the stability and activity of model single-atom catalysts under eCOR conditions.

Primary stability of implants placed at different angulations in artificial bone.

Introduction: The aim of this study was to evaluate the primary stability (PS) of titanium implants with a progressive thread design and more thread stability in the apical threads placed in artificial bone materials.

Materials And Methods: A total of 120 implants were placed in commercially available polyurethane composite bone blocks. The angulations that were chosen to place the implants in bone types II and IV were 0, 10, and 20 degrees, respectively.

Dentin tubule occlusion and erosion protection effects of dentifrice containing bioadhesive PVM/MA copolymers.

Objectives: To study the effectiveness of a dentifrice containing polyvinylmethyl ether-maleic acid (PVM/MA) copolymer in occluding dentin tubules and investigate the interaction between PVM/MA and type I collagen using surface plasmon resonance (SPR).

Materials And Methods: Fifteen volunteers brushed dentin discs in situ using dentifrices with and without PVM/MA copolymer in a cross-over design. Dentin tubule occlusion was evaluated after brushing, after overnight saliva challenge in vivo for 12 h and after drinking 250 ml of orange juice.

A comparison of stress distributions for different surgical procedures, screw dimensions and orientations for a Temporomandibular joint implant.

Finite element analysis is a useful analytical tool for the design of biomedical implants. The aim of this study was to investigate the behavior of temporomandibular joint implants with multiple design variables of the screws used for fixation of the implant. A commercially available implant with full mandible was analyzed using a finite element software package.

Evidence-based techniques to assess the performance of dental implants.

The clinical use of evidence-based medicine has been regarded as one of the most significant medical advancements of the last century. As the costs of medical care escalate, clinical decisions have to be made prudently and with a high degree of efficacy. One of the most expensive treatments in dentistry includes the use of dental implants to rehabilitate partial and fully edentulous patients.

Ethics in biomaterials research.

There have been rapid advances in biomaterials research in the past few decades, which have influenced almost all areas of medicine and dentistry. Many ethical concerns related to the use of biomaterials fabricated from artificial substances including metals, polymers, and ceramics have been raised in the past. Most of these include safety and potential harmful effects on the human body.

Fourth International Conference on Ethical Issues in Biomedical Engineering.

The Fourth International Conference on Ethical Issues in Biomedical Engineering was held at Polytechnic University in Brooklyn, New York, from April 20-22, 2007. The conference was attended by speakers from seven countries that included biomedical engineers, clinicians, philosophers, ethicists, lawyers, patient advocates, biomedical company representatives, and graduate and undergraduate students in biomedical engineering programs. The welcoming address was given by John R.

Temporomandibular joint disorders: artificial joint replacements and future research needs.

Temporomandibular disorders (TMD) affect a significant section of the American population. According to the National Institutes of Health (NIH), an estimated 3% to 5% of Americans suffer from temporomandibular disorders. Majority of TMDs can be treated by conservative methods, albeit surgical interventions are indicated for some pathological/clinical conditions (according to the American Association of Temporomandibular Joint Surgeons).