Hybrid Redox Flow Cells with Enhanced Electrochemical Performance via Binderless and Electrophoretically Deposited Nitrogen-Doped Graphene on Carbon Paper Electrodes.

Hybrid redox flow cells (HRFC) are key enablers for the development of reliable large-scale energy storage systems; however, their high cost, limited cycle performance, and incompatibilities associated with the commonly used carbon-based electrodes undermine HRFC's commercial viability. While this is often linked to lack of suitable electrocatalytic materials capable of coping with HRFC electrode processes, the combinatory use of nanocarbon additives and carbon paper electrodes holds new promise. Here, by coupling electrophoretically deposited nitrogen-doped graphene (N-G) with carbon electrodes, their surprisingly beneficial effects on three types of HRFCs, namely, hydrogen/vanadium (RHVFC), hydrogen/manganese (RHMnFC), and polysulfide/air (S-Air), are revealed.

Using a Virtual Reality Serious Game to Assess the Performance of Older Adults with Frailty.

Objectives: The comparison of cognitive performance of older adults with frailty and non-frail ones (according to Fried's criteria) was investigated.

Methods/design: The differences in performance between people with frailty and individuals without frailty according to Fried were tested using a Virtual Reality (VR) application. The Fried criteria for frailty were used to categorize users into study groups, while standardized batteries were used for a Comprehensive Geriatric Assessment, including Activities of Daily Living (ADL), lifestyle, cognition, and depression screening.

Theoretical Efficiency Limits of Photoelectrochemical CO Reduction: A Route-Dependent Thermodynamic Analysis.

Solar-fuel formation via photoelectrochemical (PEC) routes using water and CO as feedstock has attracted much attention. Most PEC CO reduction studies have been focused on the development of novel photoactive materials; however, there is still a lack of understanding of the key limiting factors of this process. In this study, the theoretical limits of Solar-to-Fuel (STF) efficiencies of single- and dual-junction photo-absorbing materials are illustrated for single-step multi-electron CO reduction into fuels including HCOO , CO, CH OH and C H OH.

A microfluidic photoelectrochemical cell for solar-driven CO conversion into liquid fuels with CuO-based photocathodes.

Utilising photoelectrochemical (PEC) devices to produce sustainable fuels from water and CO2 is a very attractive strategy, in which sunlight is used to convert the greenhouse gas (CO2) into a usable form of stored chemical energy. While significant progress has been made in the development of efficient photoactive catalysts for PEC reactions, limited efforts have been focused on the reactor design where continuous flow microfluidic PEC reactors are particular promising. In this work, a range of CuO-based thin films were used as photocathodes in a continuous flow microfluidic PEC reactor using CO2-saturated aqueous NaHCO3 solution under simulated AM 1.

[The effect of amniotic fluid on bacteria].

Antibacterial activity of the amniotic fluid (performed by transabdominal amniocentesis) was analysed in 61 pregnant women between the 15th and the 42nd week of gestational age by using laboratory stocks of Escherichia coli, Pseudomonas aeruginosa and Klebsiella of human origin. It is stated that up to the 30th week of pregnancy the amniotic fluid does not exert any inhibition effect on the growth of Escherichia coli, Pseudomonas aeruginosa, or Klebsiella. After the 31st week the inhibition activity of the amniotic fluid in thee bacteria progressively (with the gestational age) intensifies.

[A full-term abdominal pregnancy. (A case report)].

A case of mature ectopic abdominal pregnancy diagnosed preoperatively by ultrasound is described. Up to the establishment of the diagnosis the case was treated as a normal pregnancy. The foetus died 3 weeks before the term of delivery.

[Acute myocardial infarct and pregnancy. A case report].

The authors describe a case of acute myocardial infarction in a healthy parturient in the 10th I. m. who had a spontaneous delivery without any major complications.