Rapid generation of massive thermodynamic datasets using frequency comb spectroscopy.

We demonstrate massively parallel spectroscopic measurements of 12C2H2 using an optical frequency comb. This allows for the rapid and simultaneous estimation of self-broadening and self-shifting of more than 50 optical transitions between 1512 and 1538 nm. The use of a temperature-controlled sealed gas cell allows us to measure both pressure- and temperature-mediated broadening and shifting. We present the results for the pressure-mediated self-broadening and self-shifting coefficients for 59 optical lines that make up the v1 + v3 combination band and a selection of hot bands. Our ability to measure the broadening of numerous transitions allows for the confirmation of prior work that shows that there is no measurable vibrational dependence across all acetylene bands, despite the strong dependence of the broadening coefficient on the rotational number. We also present an extensive measurement of the temperature dependence of the self-broadening for each of these 59 lines. This work shows the revolutionary power afforded by the frequency combs for rapid generation of large datasets related to thermodynamic variations of the key spectroscopic parameters of important gases.

Comb spectroscopy of CO2 produced from microbial metabolism.

We have developed a direct frequency comb spectroscopy instrument, which we have tested on Saccharomyces cerevisiae (baker's yeast) by measuring its CO2 output and production rate as we varied the environmental conditions, including the amount and type of feed sugar, the temperature, and the amount of yeast. By feeding isotopically-enhanced sugar to the yeast, we demonstrate the capability of our device to differentiate between two isotopologues of CO2, with a concentration measurement precision of 260 ppm for 12C16O2 and 175 ppm for 13C16O2. We also demonstrate the ability of our spectrometer to measure the proportion of carbon in the feed sugar converted to CO2, and estimate the amount incorporated into the yeast biomass.

Understanding the basic assessment and treatment of lower urinary tract symptoms in older women.

Lower urinary tract symptoms (LUTS) are prevalent in older women. These symptoms are often under-reported due to the potentially embarrassing nature of the symptoms and a belief that they are an inevitable consequence of ageing. LUTS such as urinary incontinence have a significant negative effect on people's quality of life; however, with the appropriate assessment and management, improvements can be achieved. This article reviews the different types of LUTS and their causes, assessment and treatment, focusing on older women. It aims to provide nurses with an understanding of LUTS so that they can identify appropriate interventions.

Practice observed in managing gynaecological problems in post-menopausal women during the COVID-19 pandemic.

The way in which gynaecology services are provided in the UK has drastically changed within a short space of time due to the global COVID-19 pandemic. Gynaecologists are not considered front-line staff in the treatment of the novel coronavirus unlike our intensive care or accident and emergency colleagues. However, the impact this is having on those with chronic problems is significant, and the morbidity associated with missed malignancies could be problematic. This article summarises the strategies developed at King's College Hospital to remodel services to best provide optimum treatment to patients in this new era.