62 research outputs found
Ătude et restauration de la momie Ă©gyptienne du musĂ©um de Nantes
IntĂ©grĂ©e dans les collections du musĂ©um dâHistoire naturelle de Nantes depuis le dĂ©but du XIXe siĂšcle, une momie Ă©gyptienne a rĂ©cemment Ă©tĂ© Ă©tudiĂ©e, analysĂ©e et restaurĂ©e par un Ă©gyptologue, un mĂ©decin radiologiste, des physiciens, des chimistes, des conservateurs et des restaurateurs qui relatent ici les diffĂ©rentes Ă©tapes de cette collaboration pluridisciplinaire
Effect of angiotensin-converting enzyme inhibitor and angiotensin receptor blocker initiation on organ support-free days in patients hospitalized with COVID-19
IMPORTANCE Overactivation of the renin-angiotensin system (RAS) may contribute to poor clinical outcomes in patients with COVID-19.
Objective To determine whether angiotensin-converting enzyme (ACE) inhibitor or angiotensin receptor blocker (ARB) initiation improves outcomes in patients hospitalized for COVID-19.
DESIGN, SETTING, AND PARTICIPANTS In an ongoing, adaptive platform randomized clinical trial, 721 critically ill and 58 nonâcritically ill hospitalized adults were randomized to receive an RAS inhibitor or control between March 16, 2021, and February 25, 2022, at 69 sites in 7 countries (final follow-up on June 1, 2022).
INTERVENTIONS Patients were randomized to receive open-label initiation of an ACE inhibitor (nâ=â257), ARB (nâ=â248), ARB in combination with DMX-200 (a chemokine receptor-2 inhibitor; nâ=â10), or no RAS inhibitor (control; nâ=â264) for up to 10 days.
MAIN OUTCOMES AND MEASURES The primary outcome was organ supportâfree days, a composite of hospital survival and days alive without cardiovascular or respiratory organ support through 21 days. The primary analysis was a bayesian cumulative logistic model. Odds ratios (ORs) greater than 1 represent improved outcomes.
RESULTS On February 25, 2022, enrollment was discontinued due to safety concerns. Among 679 critically ill patients with available primary outcome data, the median age was 56 years and 239 participants (35.2%) were women. Median (IQR) organ supportâfree days among critically ill patients was 10 (â1 to 16) in the ACE inhibitor group (nâ=â231), 8 (â1 to 17) in the ARB group (nâ=â217), and 12 (0 to 17) in the control group (nâ=â231) (median adjusted odds ratios of 0.77 [95% bayesian credible interval, 0.58-1.06] for improvement for ACE inhibitor and 0.76 [95% credible interval, 0.56-1.05] for ARB compared with control). The posterior probabilities that ACE inhibitors and ARBs worsened organ supportâfree days compared with control were 94.9% and 95.4%, respectively. Hospital survival occurred in 166 of 231 critically ill participants (71.9%) in the ACE inhibitor group, 152 of 217 (70.0%) in the ARB group, and 182 of 231 (78.8%) in the control group (posterior probabilities that ACE inhibitor and ARB worsened hospital survival compared with control were 95.3% and 98.1%, respectively).
CONCLUSIONS AND RELEVANCE In this trial, among critically ill adults with COVID-19, initiation of an ACE inhibitor or ARB did not improve, and likely worsened, clinical outcomes.
TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT0273570
Ătude et restauration de la momie Ă©gyptienne du MusĂ©um dâHistoire naturelle de Nantes
International audienceIntĂ©grĂ©e dans les collections du musĂ©um dâHistoire naturelle de Nantes depuis le dĂ©but du XIXe siĂšcle, une momie Ă©gyptienne a rĂ©cemment Ă©tĂ© Ă©tudiĂ©e, analysĂ©e et restaurĂ©e par un Ă©gyptologue, un mĂ©decin radiologiste, des physiciens, des chimistes, des conservateurs et des restaurateurs qui relatent ici les diffĂ©rentes Ă©tapes de cette collaboration pluridisciplinaire
Leachate recirculation: moisture content assessment by means of a geophysical technique
International audienceBioreactor technology is a waste treatment concept consisting in speeding up the biodegradation of landfilled waste by optimizing its moisture content through leachate recirculation. The measurement of variations in waste moisture content is critical in the design and control of bioreactors. Conventional methods such as direct physical sampling of waste reach their limits due to the interference with the waste matrix. This paper reviews geophysical measurements such as electrical direct current and electromagnetic slingram methods for measuring the electrical conductivity. Electrical conductivity is a property, which is linked to both moisture and temperature and can provide useful indications on the biodegradation environment in the waste mass. The study reviews three site experiments: a first experimentation shows the advantages (correlation between conductive anomaly and water seepage) but also the limits of geophysical interpretation; the two other sites allow the leachate recirculation to be tracked by studying the relative resistivity variation versus time from electrical 2D imaging. Even if some improvements are necessary to consider geophysical measurements as a real bioreactor monitoring tool, results are promising and could lead to the use of electrical 2D imaging in bioreactor designing
Assessing benthic habitatsâ sensitivity to human pressures: a methodological framework
00000no abstrac
Assessing benthic habitatsâ sensitivity to human pressures: a methodological framework
00000no abstrac
juillet-août 2013
Restaurer, valoriser, faire connaĂźtre⊠le patrimoine Le patrimoine est le sujet principal des diffĂ©rents articles proposĂ©s par ce nouveau numĂ©ro de La Lettre de lâOCIM. Quâil sâagisse du patrimoine technique et industriel que les institutions musĂ©ales membres du rĂ©seau RĂ©MuT sâefforcent â chacune Ă leur maniĂšre en fonction de leurs statuts â de sauvegarder et de gĂ©rer ; quâil sâagisse du patrimoine scientifique des universitĂ©s bordelaises dont lâinventaire et la valorisation sont utilisĂ©s comme ferment de la nouvelle organisation universitaire ; quâil sâagisse encore dâun Ă©lĂ©ment du patrimoine musĂ©ographique â une momie Ă©gyptienne â dont lâĂ©tude et la restauration ont permis la mise en commun des compĂ©tences de spĂ©cialistes venus dâhorizons les plus divers ; quâil sâagisse enfin dâune grotte qui offre Ă travers des visites guidĂ©es des perspectives pĂ©dagogiques pour la sensibilisation du public Ă la gĂ©ologie et montre ainsi lâimportance de la patrimonialisation des espaces naturels. Ces intiatives et projets mettent en valeur des pratiques professionnelles dont lâobjectif principal est la diffusion au plus grand nombre dâune culture scientifique, technique et industrielle dĂ©sormais indispensable au citoyen pour apprĂ©hender lâorientation des politiques publiques conduites dans le domaine des sciences et de la technologie. Serge Lochot, RĂ©dacteur en che
MĂ©thodologie pour lâĂ©valuation de la sensibilitĂ© des habitats benthiques aux pressions anthropiques.
La sensibilitĂ© des habitats marins aux pressions dâorigine anthropique fait aujourdâhui partie intĂ©grante des paramĂštres Ă prendre en compte pour une gestion efficace du milieu marin et pour rĂ©pondre aux objectifs Ă©cologiques fixĂ©s par les directives europĂ©ennes (DHFF, DCSMM, DCE). Il est notamment essentiel dâĂ©valuer la sensibilitĂ© pour : permettre dâidentifier les pressions qui pourraient compromettre lâĂ©tat Ă©cologique des habitats Ă©valuer la vulnĂ©rabilitĂ© des habitats et les risques dâimpact liĂ©s aux activitĂ©s humaines, aider Ă orienter et prioriser des mesures de gestion qui soient adaptĂ©es et cohĂ©rentes Ă lâĂ©chelle locale, rĂ©gionale et nationale.Dans ce contexte, le MEDDE a confiĂ© au SPN-MNHN, en lien Ă©troit avec des experts benthologues, le dĂ©veloppement dâune mĂ©thode scientifique dâĂ©valuation de la sensibilitĂ© des habitats benthiques de France mĂ©tropolitaine aux pressions anthropiques.Douze pressions physiques, priorisĂ©es pour la premiĂšre phase du projet, sont dĂ©finies dans ce document. Les autres pressions physiques ainsi que les pressions chimiques et biologiques seront dĂ©finies dans un second temps et la sensibilitĂ© des habitats Ă ces pressions sera Ă©valuĂ©e selon la prĂ©sente mĂ©thode.La mĂ©thode se veut harmonisĂ©e et cohĂ©rente Ă lâĂ©chelle nationale mais Ă©galement Ă lâĂ©chelle europĂ©enne pour pouvoir ĂȘtre utilisĂ©e de maniĂšre transverse dans des travaux dâĂ©valuation au niveau rĂ©gional ou international (ex : DHFF, DCSMM, OSPAR).Ce document prĂ©sente la mĂ©thodologie scientifique dĂ©veloppĂ©e pour lâĂ©valuation de la sensibilitĂ© des habitats, les rĂšgles et critĂšres dâĂ©valuation, la terminologie associĂ©e, les dĂ©finitions des pressions physiques Ă©valuĂ©es en prioritĂ©, ainsi que des recommandations dâutilisation Ă lâattention des gestionnaires du milieu marin
- âŠ