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Advanced practice nurses constitute a new professional group within the French health care system. Advanced practice nurses specialise in one of five disciplines including Psychiatry/Mental-Health. This specific discipline is strongly marked by stigmatising representations by healthcare users and other health professionals (including other advanced practice nurses), whose consequences have a deleterious effect. The aim was to highlight all advanced practice nurses representation of Psychiatry/Mental-Health advanced practice nurses. An observational descriptive survey, based on an anonymous online questionnaire was conducted in April 2022 among qualified and student advanced practice nurses from the five specialist disciplines. Overall, 356 advanced practice nurses completed the survey questionnaire. No significant difference in stigmatising representations of Psychiatry/Mental-Health advanced practice nurses versus other advanced practice nurses was observed. Only 3.3% of other advanced practice nurses thought that Psychiatry/Mental-Health advanced practice nurses are often 'strange'. Psychiatry/Mental-Health advanced practice nurses and other advanced practice nurses appeared to have similar representations of the professional roles of advanced practice nurses in general and of advanced practice nurses APN specifically. Unlike other professionals in the psychiatric field (e.g. medical interns, nurses), very little stigmatisation of Psychiatry/Mental-Health advanced practice nurses by their colleagues (i.e. other advanced practice nurses) was observed. This could be partly due to the fact that advanced practice nurses professional identity appeared to be built collectively around the concept of advanced practice. Advanced practice nurses constitute a professional group that is fully involved in contemporary transformations in care and organisational innovation. The very low level of stigmatisation of Psychiatry/Mental-Health advanced practice nurses by other advanced practice nurses in our study suggests that these new healthcare actors could play a crucial role in the improvement of professional health practices, particularly in terms of improved coordination between psychiatric-care and physical-care., (© 2024 The Authors. International Journal of Mental Health Nursing published by John Wiley & Sons Australia, Ltd.)

Carbon dioxide (CO 2 ) and methane (CH 4 ) are two climate-sensitive components of gases migrating within sediments and emitted into the water column on continental margins. They are involved in several key biogeochemical processes entering into the global carbon cycle. In order to perform onboard measurements of both the molecular and stable carbon isotope ratios (δ 13 C) of CH 4 and CO 2 of natural gases during oceanic cruises, we have developed a novel approach coupling gas chromatography (GC) with cavity ring-down spectroscopy (CRDS). The coupled devices are connected to a small sample isotope module (SSIM) to form a system called GC-SSIM-CRDS. Small volumes of natural gas samples (<1 mL) are injected into the GC using a headspace autosampler or a gas-tight syringe to separate the chemical components using a Shincarbon ST packed column and for molecular quantification by thermal conductivity detection (TCD). Subsequently, CO 2 from the sample is trapped in a 7 mL loop at 32 °C before being transferred to the CRDS analyzer for sequential determination of the stable carbon isotope ratios of CH 4 and CO 2 in 24 min. The loop is an open column (without stationary phase). This approach does not require the use of adsorbents or cooling for the trapping step. Optimization of the separation step prior to analysis was focused on the influence of two key separation factors 1) the flow of the carrier gas and 2) the temperature of the oven. Our analytical system and the measurement protocol were validated on samples collected from gas seeps in the Sea of Marmara (Turkey). Our results show that the GC-SSIM-CRDS system provides a reliable determination of the molecular identification of CH 4 and CO 2 in complex natural gases, followed by the stable carbon isotope ratios of methane and carbon dioxide., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)