RESUMO
The presence and distribution of preserved organic matter on the surface of Mars can provide key information about the Martian carbon cycle and the potential of the planet to host life throughout its history. Several types of organic molecules have been previously detected in Martian meteorites1 and at Gale crater, Mars2-4. Evaluating the diversity and detectability of organic matter elsewhere on Mars is important for understanding the extent and diversity of Martian surface processes and the potential availability of carbon sources1,5,6. Here we report the detection of Raman and fluorescence spectra consistent with several species of aromatic organic molecules in the Máaz and Séítah formations within the Crater Floor sequences of Jezero crater, Mars. We report specific fluorescence-mineral associations consistent with many classes of organic molecules occurring in different spatial patterns within these compositionally distinct formations, potentially indicating different fates of carbon across environments. Our findings suggest there may be a diversity of aromatic molecules prevalent on the Martian surface, and these materials persist despite exposure to surface conditions. These potential organic molecules are largely found within minerals linked to aqueous processes, indicating that these processes may have had a key role in organic synthesis, transport or preservation.
RESUMO
Aim To explore how working at dental education centres (DECs), away from the university campus, has influenced the attitudes of dental students towards providing dental care in a primary setting, and whether students feel that this model of dental education meets their perceived training needs.Design Exploratory, qualitative interview study.Methods Semi-structured interviews with five fourth BDS students, analysed using thematic analysis.Results The main theme identified was 'real life dentistry', as students described how their clinical experiences and the teaching at DECs would prepare them for life as a general dental practitioner. Students felt they had a positive impact on their patients, and although some felt they could not comment on the impact to the community, others thought that this was likely to be positive.Conclusion Students believed they experienced 'real life dentistry' which would prepare them well for their foundation year and future practice. They also believed they had a positive impact on their patients.