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Collisional excitation of C5H+ by He was performed by mean of state-of-the-art methods. A high level of theory quantum chemical calculations were made to determine the interaction potential energy surface of C5H+ with helium. The new two-dimensional potential energy surface obtained from the RCCSD(T)-F12 ab initio approach associated with aug-cc-pVTZ basis sets, presents two minima below its dissociation limit with well depths of $-101.8$ and $-100.2\, \mathrm{cm}^{-1}$ . In order to derive accurate physical conditions from rotational transitions of the recently discovered C5H+ molecule in Taurus molecular cloud (TMC-1), rate coefficients calculations are performed. The C5H+(X1Σ+)–He de-excitation rates are obtained after averaging cross-sections for thermal temperature below 100 K. The integral cross-sections are computed with the close-coupling quantum time-independent formalism for $E\le 520 \, \mathrm{cm}^{-1}$ and J ≤ 15. The new collisional data will allow accurate determination of the C5H+ abundance and will help to understand the chemistry of carbon chain ions in the interstellar gas.

Tricarbon and pentacarbon monoxides have been detected towards the Taurus Molecular Cloud (TMC-1) with relatively important abundances. Understanding the chemical formation of these molecules requires interpreting their observational spectra by mean of non-local thermodynamical equilibrium modelling. For this purpose, we report rate coefficients of C3O and C5O induced by collision with He for temperatures up to 100 K. These data are obtained by calculating inelastic cross sections for the 31 low-lying rotational levels of C3O and C5O using the close-coupling approach. The comparison of the new rate coefficients with those of HC3N and HC5N, previously used to interpret the observational spectra of C3O and C5O, reveals differences of up to an order of magnitude. The effect of the new collisional rate coefficients in radiative transfer calculations is checked by computing the excitation temperatures for some transitions and simulating the C3O and C5O column densities observed towards TMC-1. Our findings suggest that the use of HCnN as template for CnO may lead to local thermodynamic equilibrium conditions for gas densities as low as ∼103 cm−3. Regarding the interpretation of the observational spectra, using radiative transfer modelling based on the actual CnO collisional rate coefficients instead of rotational diagram analysis leads to underestimate the column densities reported in the literature by up to 25 per cent and accordingly the C3O/ C5O abundance ratio by up to 50 per cent. We expect that the new rate coefficients and the radiative transfer calculations presented in this work will encourage further modellings of the CnO abundance and accordingly constrain the chemistry.

In order to derive accurate physical conditions of the interstellar clouds (like TMC-1) from the rotational transitions of C2O, collisional rates are needed. Based on a new two-dimensional potential energy surface (2D-PES), we report a new rate coefficients calculation of C2O(X3Σ−) induced by collision with He. This PES was obtained from the explicitly correlated restricted open-shell coupled cluster with single, double and perturbative triple excitation (rccsd(t)-f12) ab initio approach associated with aug-cc-pVTZ basis sets. The C2O–He PES presents one minimum below its dissociation limit with a well depth of 42.376 cm−1. The close-coupling quantum time independent formalism was used to derive cross sections for E ≤ 370 cm−1 and N ≤ 10. De-excitation rate coefficients are obtained for thermal temperature below 80 K.

Introduction Being a victim of work-related upper extremity injuries is a source of physical damage and mental damages. Psychological distress related to this type of accident is usually underestimated. Objectives Evaluate anxiety and depression among victims of work-related upper extremity injuries. Methods We conducted a 10-month cross-sectional analysis on workers consulting for an Impairment Rating Evaluation after an upper extremity injury due to an occupational accident. We collected socio-professional data, characteristics and outcomes of the accident. Anxiety and depression were evaluated by the Hospital Anxiety and Depression scale. The pain was evaluated by a Visual Analogue Scale. Results Our population consisted of 90 cases of work-related upper-extremity injuries. The mean age was 43.10 and the sex ratio 3.7. The most represented category was blue-collar workers (71.1%). Medical history of chronic diseases was reported in 23% of cases and 3.3 % had mental health antecedent. Dominant upper limb injuries were found in 62% of cases. Hand and wrist injuries were the most affected part (63%), and 33.3% had fingers’ injuries. The prevalence of anxiety and depression were 31.1% and 20% respectively. About thirty-one per cent rated their current pain greater than or equal to 8. Both anxiety and depression were positively correlated with male gender (p= 0.001, p=0.007) and shoulder injuries (p=0.001, p=0.018). Depression was correlated to fingers’ injuries and pain (p=0.002). Conclusions The studied population present an important rate of anxiety and depression. Assessing Mental health after upper extremities injuries are necessary to prevent serious mental illness and to promote a successful return to work. Disclosure No significant relationships.

Introduction A growing body of literature has documented that occupational stress is associated with increased risks of musculoskeletal injuries or symptoms. Objectives The purpose of this study was to assess the effect of occupational stress on the occurrence of musculoskeletal symptoms among workers in a Tunisian footwear industry. Methods Material and methods: This was an exhaustive and cross-sectional study including workers in a footwear industry. Musculoskeletal symptoms were assessed using a modified Nordic questionnaire. We used the Job Demand/Control model of Karasek to measure occupational stress. The Quick Exposure Check (QEC) method was used as an ergonomic risk assessment tool. Data were analysed using R software. Results A total of 337 workers participated in the survey (the age range: 18-60 years). A total of 83.7 of workers reported musculoskeletal symptoms at one site or more. Elbows and upper back were the most symptomatic sites in respectively 84% and 65%. We noted job-strain and iso-strain situations in respectively 57% and 32%. In 78.1% of the workers studied, the QEC score was high and very high in 21.9%. Multivariable-adjusted logistic regression model showed that iso-strain situation was associated with the number of symptomatic sites (p= 0.0003, OR=1.34), having musculoskeletal symptoms in elbows (p= 0.03, OR=2.33) and upper back (p=0.009, OR=2.40), and the final QEC score (p= 0.018, OR= 1.04). Conclusions Occupational stress constitutes a significant risk for this leather industry. It is associated with a higher prevalence of musculoskeletal symptoms in the workplace and with work-related biomechanical exposure. Disclosure No significant relationships.

Introduction Covid-19 vaccination in adults become a common behaviour nowadays. It may induce stress in some of the vaccinated patients. Objectives This study aimed to evaluate perceived Stress among university teachers desiring to be vaccinated. Methods We conducted a cross-sectional study on Tunisian university teachers who participated in a COVID-19 vaccination campaign organized in June 2021. A self-administered questionnaire was administered. The survey dealt with socio-professional data and the level of stress assessed with the Perceived Stress Scale (PSS-10). Results A total of 100 participants were included. The mean age was 51 years ±7. The Sex Ratio (M/F) was 1.7. The majority of participants were married and reported living with their families (96%). On a 0 to 10 scale, 71% of participants described an excellent health status and rated it greater than or equal to 8. The average job tenure was 15 years. The PSS-10 showed moderate and high perceived stress in 86% and 4% of participants, respectively. Only 10% of university teachers presented low-stress perception. Conclusions Getting vaccinated against Covid-19 is crucial in order to protect the population. This behaviour could be associated with a big amount of stress. Taking into account the psychiatric mental condition is crucial for the vaccinating health care providers in order to alleviate this experience. Disclosure No significant relationships.

An appropriate estimation of the abundance of the observed C

Introduction Over the past decades, a growing body of evidence has demonstrated the impact of the psychosocial work environment on workers’ health, safety and wellbeing. These factors may also affect employees ’job satisfaction. Objectives To explore psychosocial determinants of job satisfaction among workers in a Tunisian electricity and gas company. Methods A cross-sectional survey was conducted among male workers in a Tunisian electricity and gas company. The Copenhagen Psychosocial Questionnaire (COPSOQ), the Job Content Questionnaire and the general health questionnaire (GHQ12) were used to assess psychosocial risk factors at work. A principal component analysis (PCA) was used to assess correlations between instruments ’scores. Multiple linear regression analysis was applied to explore the specific factors associated with job satisfaction. Data were analysed using R software. Results A total of 83 workers participated in the survey (the age range: 21-60 years). Job satisfaction score varied from 0 to 100% with a mean of 73.09 %. In the PCA, job satisfaction had a positive correlation with high social support and a negative one with work-family conflicts, a high psychological demand, stress, burnout and quantitative demands. In multivariate analysis, factors negatively associated with job satisfaction were: age, stress and low social support. In contrast, seniority was positively associated with job satisfaction. Conclusions Job satisfaction is deeply influenced by the psychosocial work environment. Therefore, it is necessary to provide supervision, communication, and social support for these workers to increase or maintain a high level of job satisfaction. Disclosure No significant relationships.

Introduction Post-traumatic stress disorder frequently alters the quality of life. Objectives Assess the quality of life in midwives who have post-traumatic stress disorder. Methods We conducted a cross-sectional study among midwives in a single university hospital centre using a self-administered questionnaire. We screened post-traumatic stress disorder using the Impact of event scale and the quality of life using 5 items Likert scale. Results Our response rate was 82%. Out of 42 midwives who answered us, 18 had post-traumatic stress disorder symptoms (42.8%). They were all female. Their mean age was 45.6± 10.3 years. The traumatic event occurred mainly at work and was related to the death of a mother or a baby. Symptoms of post-traumatic stress disorder symptoms were severe in 5 midwives. The quality of life was altered in 38.8% of participants. Both post-traumatic stress disorder symptoms and alteration of the quality of life were more frequent in patients who don’t have leisure activities. Conclusions In conclusion, midwives are vulnerable to developing post-traumatic stress disorder. Encouraging sports and other leisure activities may protect them from having severe repercussions on their life. Disclosure No significant relationships.

Introduction Nursing is highly demanding and stressful profession. Therefore, maintaining and improving psychological wellbeing among nurses seems essential to have a better life satisfaction and a better productivity. Objectives The aim of this study was to assess the relationship between mental health and life satisfaction among nurses. Methods The study was conducted in a group of active nurses from Hedi Chaker hospital in Sfax- Tunisia. Standardized questionnaires were used, including the general health questionnaire (GHQ-28) and the satisfaction with life scale (SWLS). Results A total of 100 (males = 40; females = 60) nurses participated in this study. The mean age was 50.20 ±7.20 years. The average of job tenure was 25.25 ± 9.70 years. The majority of participants (66.7%) reported having chronic diseases. Rotating shifts work was noted in 72.50% of cases. Average scores for the GHQ-28 and the SWLS were respectively 30.66 ± 11.07 and 21.61± 6.23. The presence of chronic conditions was associated with psychological distress (higher GHQ-28 scores) (p = 0.01). Life satisfaction score was positively correlated with age (r= 0.29, p= 0.023), whereas it was negatively correlated with GHQ-28 scores (r= -0.36, p= 0.01). Low life satisfaction (SWLS scores between 5 and 14) was significantly associated with three domains of the GHQ-28: somatic symptoms (p = 0.008), anxiety (p = 0.001) and social dysfunction (p = 0.01). Conclusions According to our study, low life satisfaction was associated with psychological disorder. Hence, nurses need support and subsequent interventions in order to improve psychological wellbeing and life-satisfaction. Disclosure No significant relationships.

Introduction Working at Covid-19 frontline may threaten physical and mental health healthcare workers (HCWs). Assessing perceived Stress in HCWs is important to prevent serious mental illness Objectives Assess the association between perceived stress and risk perception among healthcare workers working in the Covid-19 unit. Methods We conducted a cross-sectional study among healthcare workers working in a COVID-19 unit between March and July 2021 through a self-administered questionnaire. The Perceived Stress Scale (PSS-10) was used to assess perceived stress. The perceived risk of getting infected was assessed by a 5-item Likert Scale. The perceived risk of family members’ infection was evaluated by a Scale from 0 to 10. Results A total of 85 participants were included. The mean age was 31±6 years. About 87% of participants lived with their families. Seventy-six per cent of HCWs rated their health status greater than or equal to 8/10. A percentage of 18,8% of HCWs have been infected with the Covid-19. Our population consisted of 44.7% technicians and 24,7% nurses, and 80% of the participants reported direct contact with COVID-19 confirmed patients. The level of the perceived risk of getting infected was high to very high in 95% of the HCWs. The mean score of the perceived risk of family members contracting the virus was 5.7 and 27,1% rated it greater than or equal to 8. The PSS-10 showed moderate and high perceived stress in 82,3% and 7,1% of participants, respectively. Only 10,6% of HCWs presented low-stress perception. Conclusions Frontline healthcare providers have high perceived stress and are at risk of mental health disorders Disclosure No significant relationships.

Among all the molecular species found in the interstellar medium, molecules with threefold symmetry axes play a special role, as their rotational spectroscopy allows them to act as practical gas thermometers. Methyl-cyanide (CH3CN) is the second most abundant of those (after ammonia). We compute in this paper the collisional dynamics of methyl-cyanide in collision with helium, for both the A- and the E-symmetries of CH3CN. The potential energy surface is determined using the CCSD(T)-F12b formalism and fit with convenient analytic functions. We compute the rotationally inelastic cross sections for all levels up to 510 cm-1 of collision energy, employing at low energy exact Coupled Channels methods, and at higher energies, approximate Coupled States methods. For temperatures from 7 K up to 300 K, rates of quenching are computed and most are found to differ from those reported earlier (up to a factor of a thousand), calling for a possible reexamination of the temperatures assigned to low density gasses.

Isocyanic acid (HNCO) is a simple molecule containing the four main atoms essential for life and can be considered as a prebiotic molecule. To model the HNCO emission in the IRAS16293-2422 class 0 low-mass protostar, we used a new set of HNCO collisional coefficients with ortho-H2and para-H2, computed from a set of rotational excitation quenching rates between HNCO and H2based on a novel potential energy surface for the rigid molecules interactions. We present here the HNCO Potential Energy Surface used to compute this new set of collisional coefficients and the result of the IRAS16293-2422 HNCO spectrum modelling using them.

Cyclopropenylidene, c-C3H2, is a simple hydrocarbon, ubiquitous in astrophysical gases, and possessing a permanent electric dipole moment. Its readily observed rotational transitions make it an excellent probe for the physics and history of interstellar matter. The collisional properties of c-C3H2 with the main background gas, H2, are computed here. We present a full 5-D Potential Energy Surface in the rigid molecule approach, and fit it to relevant functionals for subsequent scattering. We perform low-energy quantum scattering at energies less than 50 cm-1. We use both ortho and para H2 as projectiles. We determine the quality of the various approximations to exact coupled channel scattering and examine paths to go towards higher energy scattering relevant for astrophysics. We compare the results obtained here with earlier ones for scattering with helium.

Among the closed-shell hydrocarbons, the carbenes c- and l-C

The CCN radical has been recently detected in the interstellar medium. Accurate modeling of its abundance in such media requires one to model its excitation by both radiation and collisions. Here, we report the first quantum mechanical close-coupling study of CCN-He collisions. Calculations of fine-structure resolved excitation cross sections of CCN(X

Collisional energy transfer under cold conditions is of great importance from the fundamental and applicative point of view. Here, we investigate low temperature collisions of the SH

Phosphorus bearing molecules have been discovered in the circumstellar and interstellar media. Modeling their abundance accurately requires computations of rate coefficients induced by collision with He and H

IntroductionBurn out mainly occurs among healthcare employees. This professional category is exposed to a large load of emotional disturbance.ObjectivesThe aim of this work was to study the levels of burnout syndrome in caregivers who were victims to occupational accident.MethodsThis cross-sectional study was conducted during 2014-2015 in the occupational medicine department. The target population consisted of the healthcare employees who reported their exposure to occupational accident. A semi-structured self-reported questionnaire including the Maslach questionnaire was used to collect information. Data were analyzed using SPSS-20.ResultsOne hundred and sixty health professionals returned the questionnaire (58% women, mean age 31.9 years old). Occupational accidents occurred mostly in the morning (62.5%). Among the healthcare providers, 112 health professionals (70%) had had sharp injuries. Burn out was found among 23.1% of the studied population. It was defined by its three domains: a high emotional exhaustion (46.9%), high depersonalization with low personal accomplishment (36.3%) and high depersonalization without low personal accomplishment (34.4%). Professionals with less years in the function (P = 0.031) and technicians (P = 0.028) were more affected by Burnout. A significant relationship was found between traumatic accidents (P = 0.012), needle stick injuries (P = 0.009) and burnout.ConclusionThe prevalence of burnout is high among health professionals which can increase the risk of occupational accidents and its subsequent risks. It seems that holding workshops and increasing healthcare givers’ awareness and skills to face these risks can be effective in mitigating them.Disclosure of interestThe authors have not supplied their declaration of competing interest.

IntroductionThe medical and scientific communities are continually reporting that night work can increase the risk of certain disorders and have a negative impact on the overall well-being of employees.ObjectivesThis study wanted to examine the impact of night work on physical and psychological well-being of hospital staff.MethodsWe carried out a cross-sectional study about a representative sample of hospital staff. We used validated self-reporting instruments: the Perceived Stress Scale (PSS) and the Subjective Well-being Scale (SWS). Data were analyzed using SPSS-20.ResultsOur study concerned 519 hospital staffs. More than half were male (53%) and 83.1% had worked in the same position for more than two years. More than half of the participants (51. 3%) considered themselves in very good health. Also 41.5% of participants had a well-being index reduced and 26% of personal had high perceived stress. Correlation analysis had shown that more than one guard at week was associated with high levels of perceived stress (P = 0.004) and well-being index reduced (P = 0.000). After adjusting for categories, more than one shift work at week was associated to well-being index reduced with odds ratios of 1.57 (confidence interval 95% [1.07 to 2.30]).ConclusionThere is a clear correlation between night work, perceived stress and subjective well-being of different categories of hospital staff. Shift work interferences on health and well-being are complex and multifaceted in their origins and time manifestations, dealing with several aspects of personal characteristics, and working and living conditions.Disclosure of interestThe authors have not supplied their declaration of competing interest.

Resume Le syndrome de dysfonction reactive des bronches survenant apres l'inhalation accidentelle de hautes concentrations de gaz ou de vapeurs de produits irritants est une entite d'individualisation recente, Il est impute a l'action de ces produits sur l'epithelium bronchique. L'histologie bronchique peut aider au diagnostic. L'evolution est variable et imprevisible, Le RADS n'est pas reconnu comme asthme professionnel mais peut etre declare comme accident de travail. Nous rapportons trois cas de RADS observes apres inhalation accidentelle de vapeurs chlorees et d'insecticides. Dans deux cas, ce syndrome continue a evoluer, soit 4 a 5 ans apres l'accident causal.

Langerhans cell histiocytosis or histiocytosis X has a variable course from a self-limited eosinophilic granuloma to an aggressive disseminated disease. It mainly affects children. We report a 76-year-old woman with multifocal bone histiocytosis X, involving the rachis, an iliac bone and the skull. The diagnosis has been established by histological exam. Outcome was favourable after chemotherapy.