Comment diagnostiquer la photosynthèse chez les plantes ?

On évalue la production d'oxygène et l'absorption de CO2 en conditions contrôlées.

Quels tests pour mesurer la transpiration des plantes ?

On utilise des pots de pesée pour mesurer la perte d'eau par évaporation.

Comment évaluer la respiration des plantes ?

On mesure la consommation d'oxygène et la production de CO2 dans un environnement fermé.

Quels indicateurs de stress hydrique chez les plantes ?

On observe le flétrissement, la décoloration des feuilles et la chute prématurée des fleurs.

Comment détecter la photosensibilité des plantes ?

On observe les mouvements des feuilles et la direction de croissance en fonction de la lumière.

Quels symptômes d'une carence en azote chez les plantes ?

Les feuilles jaunissent et se dessèchent, surtout les plus anciennes.

Comment reconnaître une carence en potassium ?

Les feuilles présentent des bords bruns et des taches nécrotiques.

Quels signes d'excès d'eau chez les plantes ?

Les racines pourrissent, les feuilles jaunissent et la plante flétrit.

Quels symptômes d'une carence en phosphore ?

Les plantes montrent un retard de croissance et des feuilles violettes.

Comment identifier un stress thermique chez les plantes ?

Les feuilles se recroquevillent, et la croissance est ralentie.

Comment prévenir les carences en nutriments ?

Utiliser des engrais équilibrés et effectuer des analyses de sol régulières.

Quelles pratiques pour éviter le stress hydrique ?

Installer un système d'irrigation et mulcher le sol pour conserver l'humidité.

Comment prévenir les maladies des plantes ?

Assurer une bonne circulation de l'air et éviter l'humidité excessive.

Quelles mesures pour éviter l'excès d'eau ?

Utiliser des pots avec drainage et éviter les arrosages excessifs.

Comment prévenir le stress thermique ?

Fournir de l'ombre et arroser les plantes pendant les périodes chaudes.

Comment traiter une carence en nutriments ?

Appliquer des engrais spécifiques selon le nutriment manquant.

Quelles solutions pour le stress hydrique ?

Augmenter l'arrosage et améliorer le drainage du sol.

Comment remédier à un excès d'eau ?

Réduire l'arrosage et améliorer l'aération du sol.

Quelles méthodes pour améliorer la photosynthèse ?

Optimiser l'éclairage et la concentration de CO2 dans l'environnement.

Comment traiter les maladies fongiques des plantes ?

Utiliser des fongicides appropriés et retirer les parties infectées.

Quelles complications d'une carence en azote ?

Peut entraîner un retard de croissance et une faible production de fruits.

Quels risques d'un excès d'eau ?

Peut provoquer la pourriture des racines et la mort de la plante.

Quelles complications d'un stress hydrique prolongé ?

Peut entraîner la défoliation et la mort des plantes.

Quels effets d'une carence en phosphore ?

Peut réduire la floraison et la fructification des plantes.

Quelles complications d'un stress thermique ?

Peut causer des brûlures foliaires et un affaiblissement général.

Quels facteurs augmentent le risque de carences ?

Un sol pauvre, une mauvaise gestion de l'eau et un manque d'engrais.

Comment le climat influence-t-il la photosynthèse ?

Des températures extrêmes et un manque de lumière peuvent réduire la photosynthèse.

Quels facteurs augmentent le stress hydrique ?

Des périodes de sécheresse prolongées et un sol mal drainé augmentent le stress.

Comment la pollution affecte-t-elle les plantes ?

La pollution de l'air et du sol peut nuire à la croissance et à la santé des plantes.

Quels facteurs de risque pour les maladies fongiques ?

L'humidité élevée et le manque de circulation d'air favorisent les maladies fongiques.

Phénomènes physiologiques des plantes - Informations médicales vérifiées

Closing the loop in minimally supervised human-robot interaction: formative and summative feedback.

08 May 2024

DOI: 10.1038/s41598-024-60905-x PMID: 38719859

Human instructors fluidly communicate with hand gestures, head and body movements, and facial expressions, but robots rarely leverage these complementary cues. A minimally supervised social robot with...

Humans Robotics Male Female Adult +3 autres

From Their Eyes: What Constitutes Quality Formative Written Feedback for Neurosurgery Residents.

03 2023

DOI: 10.1016/j.jsurg.2022.10.003 PMID: 36280588

The characteristics of quality feedback from the neurosurgery resident's perspective are not fully elucidated. The Surgical Autonomy Program is an intraoperative assessment tool based on Vygotsky's Zo... The goal of this study was twofold: to identify themes from the written feedback of SAP operative assessments and to examine if these themes influenced the neurosurgery residents' perception of feedba... In 2021, SAP data from 2019-2021 at two neurosurgery programs were reviewed. Feedback quality from the SAP was determined by the resident at the time of their assessment. Using a constant comparative ... There were 2968 SAP entries evaluated. When the ZPD concept was fully used, residents reported high quality feedback 91.4% of the time compared to 58.6% when ZPD was not used (p < 0.001). Qualitative ... Providing comments that discuss the resident's specific performance in the case, key learning points, or their progress towards independence, results in high quality feedback. Utilizing a theory-based...

Neurosurgery Internship and Residency Feedback Clinical Competence Formative Feedback +1 autres

Surgical resident experience with common bile duct exploration and assessment of performance and autonomy with formative feedback.

06 02 2023

DOI: 10.1186/s13017-023-00480-0 PMID: 36747289

Common bile duct exploration (CBDE) is safe and effective for managing choledocholithiasis, but most US general surgeons have limited experience with CBDE and are uncomfortable performing this procedu... Resident and attending assessments of resident operative performance and autonomy were obtained for 189 laparoscopic or open CBDEs performed at 28 institutions. Performance and autonomy were graded al... Compared with cases in which the resident had no prior CBDE case evaluations, cases with a prior evaluation had greater proportions of practice-ready or exceptional performance ratings according to bo... Residents with at least one prior CBDE evaluation and formative feedback demonstrated better operative performance and received greater autonomy than residents without prior evaluations, underscoring ...

Humans Internship and Residency Formative Feedback Choledocholithiasis Laparoscopy +1 autres

A qualitative study examining the critical differences in the experience of and response to formative feedback by undergraduate medical students in Japan and the UK.

05 Jun 2023

DOI: 10.1186/s12909-023-04257-6 PMID: 37277728

Formative feedback plays a critical role in guiding learners to gain competence, serving as an opportunity for reflection and feedback on their learning progress and needs. Medical education in Japan ... The study is designed and analysed with a constructivist grounded theory lens. Medical students in Japan and the UK were interviewed on the topic of formative assessment and feedback they received dur... Japanese students perceived feedback as a model answer provided by tutors which they should not critically question, which contrasted with the views of UK students. Japanese students viewed formative ... The Japanese student experience of formative assessment and feedback supports the view that medical education and examination systems in Japan are focused on summative assessment, which operates along...

Humans Students, Medical Formative Feedback Japan Clinical Competence +3 autres

When Feedback is Not Perceived as Feedback: Challenges for Regulatory Body-Mandated Peer Review.

01 11 2023

DOI: 10.1097/ACM.0000000000005362 PMID: 37983399

Safe and competent patient care depends on physicians recognizing and correcting performance deficiencies. Generating effective insight depends on feedback from credible sources. Unfortunately, physic... Between October 2018 and May 2020, 30 physicians representing various specialties and career stages were interviewed about their experiences with peer review in the context of regulatory body-mandated... Perceptions about the learning value of mandated peer review were mixed. Most saw value but felt anxiety about being selected due to being wary of regulatory bodies. Recognizing barriers such percepti... This study establishes an intriguing and challenging paradox: feedback appears often to not be recognized as feedback when it poses no threat, yet feedback that carries such threat is known to be subo...

Humans Feedback Learning Peer Review Physicians +2 autres

Development and validation of immediate self-feedback very short answer questions for medical students: practical implementation of generalizability theory to estimate reliability in formative examination designs.

24 May 2024

DOI: 10.1186/s12909-024-05569-x PMID: 38789958

Very Short Answer Questions (VSAQs) reduce cueing and simulate better real-clinical practice compared with multiple-choice questions (MCQs). While integrating them into formative exams has potential, ... Ninety-four third-year pre-clinical students took two ten-item ISF-VSAQ exams on cardiovascular drugs. Each question comprised two sections: (1) Questions with space for student responses and (2) a li... Validity evidence included five sources: (1) Content: The expert reviewed the ISF-VSAQ format, and the question was aligned with a standard examination blueprint. (2) Response process: Before starting... Electronic ISF-VSAQs enhanced understanding elevates learning outcomes, rendering them suitable for formative assessments with clinical scenarios. Increasing the number of occasions effectively enhanc...

Humans Educational Measurement Students, Medical Reproducibility of Results Formative Feedback +2 autres

Teacher feedback and student learning-The students' perspective.

10 2022

DOI: 10.1016/j.jdent.2022.104242 PMID: 35908661

Feedback from teachers to students plays an important role in informing students about the outcome of their assessments. It contributes to students' ongoing learning. The aim of this study was to inve... An online questionnaire was completed by dental students throughout Europe in this quantitative study. Data were collected via Google Forms, transferred to an excel spreadsheet and analysed using SPSS... 234 students studying in 9 different European countries completed the questionnaire. These students were born in 36 different countries within and beyond Europe. 84% (n = 197) were undergraduate stude... It would appear that there is some diversity in dental students' perceptions of: i) who delivers feedback, ii) when feedback is given, iii) the consistency of feedback received, and iv) the style of f... Most European dental students prefer to receive constructive feedback. Feedback was seen to have a significant impact on future learning despite over one in five students not knowing who had delivered...

Europe Feedback Formative Feedback Humans Students +2 autres

Application of the R2C2 Model to In-the-Moment Feedback and Coaching.

01 09 2023

DOI: 10.1097/ACM.0000000000005237 PMID: 37797303

The R2C2 (relationship, reaction, content, coaching) model is an iterative, evidence-based, theory-informed approach to feedback and coaching that enables preceptors and learners to build relationship... A qualitative study using framework analysis through the lens of experiential learning was undertaken with 15 trained preceptor-learner dyads. Data were collected during feedback sessions and follow-u... Fifteen dyads were recruited from 8 disciplines (11 preceptors were paired with a single resident [n = 9] or a single medical student [n = 2]; 2 preceptors each had 2 residents). All dyads were able t... The R2C2 model can be adapted to contexts where in-the-moment feedback conversations occur shortly after a clinical encounter. Experiential learning approaches applying the R2C2 model are critical. Sk...

Humans Feedback Mentoring Internship and Residency Formative Feedback +2 autres

A qualitative study of medical students' perceptions of resident feedback.

10 2022

DOI: 10.1111/medu.14847 PMID: 35639522

Residents play a pivotal role in medical students' clinical education. From a feedback lens, the near-peer relationship between student and resident holds the potential to foster an educational allian... Our methodology was qualitative interpretive description, informed by phenomenology. We conducted 24 semi-structured interviews with third and fourth year medical students at one institution. The inte... From the students' perspectives, when residents contributed to building interpersonal relationships with students, this in turn influenced students' receptivity to both encouraging and constructive fe... Residents are uniquely positioned to create a strong educational alliance with students in which feedback conversations can flourish. Focusing educational efforts on resident feedback conversations ha...

Feedback Formative Feedback Humans Learning Qualitative Research +1 autres

Peer feedback in graduate training: A phenomenological investigation of possibilities.

12 2022

DOI: 10.1080/0142159X.2022.2094229 PMID: 35793243

Whilst feedback is an essential component of clinical education, it is often lacking in clinical workplaces due to competing priorities. Peer feedback has been proposed as a potential solution but rem... Following an Interpretative Phenomenological Analysis approach, the personal experiences of 12 paediatric trainees were explored using semi-structured interviews. Interpretive themes were developed be... We found that peer feedback was influenced by three contextual factors, namely, prevalent feedback culture, interpersonal consent, and the quality of relationships. Peer feedback culture was lacking i... Enabling peer feedback in clinical settings requires attention to cultural, relational, and consent barriers. Potential approaches should include helping clinicians to develop greater cultural reflexi...

Humans Child Feedback Peer Group Formative Feedback +1 autres

Phénomènes physiologiques des plantes : Questions médicales fréquentes

Termes MeSH sélectionnés :

Questions fréquentes et termes MeSH associés

Diagnostic 5

Symptômes 5

Prévention 5

Traitements 5

Complications 5

Facteurs de risque 5

Contenu validé par Dr Olivier Menir

Sous-catégories

Résistance à la sécheresse

Gamétogenèse de plante

Perception de la gravité

Organogenèse des plantes

Parthénogenèse

Photosynthèse

Défense des plantes contre les herbivores

Développement des plantes

Maladies des plantes

Dispersion des plantes

Immunité des plantes

Stérilité des plantes

Nodulation racinaire

Techniques d'embryogenèse somatique végétale

Transpiration des plantes

Pollinisation

Dispersion des graines

Autofécondation

Auto-incompatibilité chez les plantes à fleurs

Tropisme

Apomixie

Métabolisme acide crassulacéen

Photophosphorylation

Étiolement

Germination

Sénescence des plantes

Maladie à phytoplasme

Nécrose et chlorose des plantes

Tumeurs végétales

Résistance à la maladie

Résistance systémique induite des plantes

Gravitropisme

Phototropisme

Dormance des plantes

Auteurs principaux

Sources (10000 au total)