Renal cell carcinoma associated with peritumoral sarcoid-like reaction without intratumoral granuloma

Non-necrotizing epithelioid granulomas have been described in association with many primary tumors. In such cases, they are designated as sarcoid-like reaction. Although it is more seen in carcinomas than in sarcomas, it is very rarely reported in renal carcinoma. Here, we describe a rare association of prominent peritumoral sarcoid-like reaction without intratumoral granulomas and conventional clear cell renal carcinoma in a 62-year-old-male, without clinical or laboratory finding of sarcoidosis. At 30 months follow-up, he had no recurrence

Nouvelle méthodologie de synthèse de molécules à potentiel diurétique

[Synthèse combinatoire ].Le présent mémoire propose l'élaboration d'une nouvelle méthodologie de synthèse de molécules ayant un potentiel diurétique, et ciblant plus particulièrement les cotransporteurs cations-chlorures, responsables du mouvement couplé des ions sodium et/ou potassium avec celui du chlorure dans plusieurs types de cellules dont celles des néphrons. La première partie est consacrée à une description de la chimie combinatoire, aux travaux antérieurs effectués dans notre laboratoire en chimie combinatoire sur support solide et à une introduction sur les sulfamides, les médicaments diurétiques et les transporteurs membranaires du rein. Le deuxième chapitre est consacré à la synthèse, à l'analyse et aux tests d'activité biologique effectués sur les molécules synthétisées. Le troisième chapitre traite de la synthèse et de la caractérisation de molécules de départ pouvant permettre la synthèse d'une gamme de produits au potentiel diurétique possédant des groupements fonctionnels encore plus diversifiés. Finalement, le quatrième et dernier chapitre traite de nos travaux effectués dans le but de synthétiser sur support solide des molécules au potentiel diurétique dans le but d'utiliser les énormes possibilités offertes par la chimie combinatoire et la synthèse rapide en parallèle

Quand un peuple juge un roi : la représentation de l'opinion publique et l'image du roi Louis XVI dans les Révolutions de Paris

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal

The Effect of Particle Strength on the Ballistic Resistance of Shear Thickening Fluids

The response of shear thickening fluids (STFs) under ballistic impact has received considerable attention due to its field-responsive nature. While efforts have primarily focused on the response of traditional ballistic fabrics impregnated with fluids, the response of pure STFs to penetration has received limited attention. In the present study, the ballistic response of pure STFs is investigated and the effect of fluid density and particle strength on ballistic performance is isolated. The loss of ballistic resistance of STFs at higher impact velocities is governed by particle strength, indicating the range of velocities over which they may provide effective armor solutions.Comment: 4 pages, 4 figure

Low Density Polyethylene, Expanded Polystyrene and Expanded Polypropylene: Strain Rate and Size Effects on Mechanical Properties

This preprint has not undergone peer review (when applicable) or any post-submission improvements or corrections. The Version of Record of this article is published in Journal of Polymer Testing, and is available online at https://doi.org/10.1016/j.polymertesting.2016.04.018Polymeric foam materials may be used as energy absorbing materials for protection in impact scenarios, and design with these materials requires the mechanical properties of foams across a range of deformation rates, where high deformation rate testing often requires small samples for testing. Owing to their cellular macrostructure, and the large deformations that occur during loading of foams, the measured stress‐strain response of a foam material may be influenced by the sample size. In this study, the mechanical properties of three closed‐cell polymeric foams (Low Density Polyethylene, Expanded Polystyrene and Expanded Polypropylene) at two different densities were investigated over a range of deformation rates from 0.01 s‐1 to 100 s‐1. For each foam material, three different nominal sample sizes (10mm, 17mm and 35 mm) were tested. On average, the polymeric foam materials exhibited increasing stress with increasing deformation rate, for a given amount of strain. Density variation was identified at the sample level, with smaller samples often exhibiting lower density. Expanded Polystyrene demonstrated the highest variability in sample density and corresponding variability in mechanical response, qualitatively supported by observed variations in the macrostructure of the foam. Expanded Polypropylene exhibited variability in density with sample size, and observable variability in the material macrostructure; however, the dependence of the measured mechanical properties on sample size was modest. Low Density Polyethylene was found to have a relatively consistent cell size at the macrostructure level, and the material density did not vary significantly with sample size. In a similar manner, the dependence of measured mechanical properties on sample size was modest. The effect of sample size was identified to be material specific, and it is recommended that this be assessed using sample‐specific density measurements and considering different sized samples when testing foam materials.The authors would like to thank DRDC Valcartier Research Center for financially supporting this research

Are feeding preferences of white-tailed deer related to plant constituents?

Controlled feeding experiments can provide valuable insights into food selection of herbivores. We conducted cafeteria trials on captive yearling white-tailed deer (Odocoileus virginianus) during 2 years to determine feeding preferences in relation to plant chemical constituents, i.e., nitrogen and fibers. We simultaneously offered 8 species of cultivated and wild plants in monthly foraging trials conducted from June to October. We predicted that species preferences would be positively related to protein content from June to August and to digestible energy in September and October. As predicted, crude protein (CP) was positively related to feeding preferences, particularly as summer progressed. Feeding preferences were also negatively related to fiber content, especially in early summer. Our results indicate high protein needs over the complete growing season for yearling deer but a decrease in overall plant selectivity as summer progresses. Our results also suggest that deer browsing on cultivated plants might be due to higher CP content of cultivated plants than wild plants. To prevent deer impact on crops, managers should favor regeneration of plants rich in CP content in forests

Principles and Operational Parameters to Optimize Poison Removal with Extracorporeal Treatments

A role for nephrologists in the management of a poisoned patient involves evaluating the indications for, and methods of, enhancing the elimination of a poison. Nephrologists are familiar with the various extracorporeal treatments ( ECTR s) used in the management of impaired kidney function, and their respective advantages and disadvantages. However, these same skills and knowledge may not always be considered, or applicable, when prescribing ECTR for the treatment of a poisoned patient. Maximizing solute elimination is a key aim of such treatments, perhaps more so than in the treatment of uremia, because ECTR has the potential to reverse clinical toxicity and shorten the duration of poisoning. This manuscript reviews the various principles that govern poison elimination by ECTR (diffusion, convection, adsorption, and centrifugation) and how components of the ECTR can be adjusted to maximize clearance. Data supporting these recommendations will be presented, whenever available.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108055/1/sdi12247.pd

Understanding and attenuating pandemic‑related disruptions : a plan to reduce inequalities in child development

The Secretary General of the United Nations described the impact of COVID-19-related school closures as a “generational catastrophe.” What will be the legacy of the 2020–2021 pandemic-related disruptions in 5, 10, 20 years from now, as regards education and well-being of children and youth? Addressing the disproportionate impact on those growing up in socio-economically disadvantaged areas or on those with pre-existing learning challenges is key to sustainable recovery. This commentary builds on the four literature reviews presented in this Special Section on a Pandemic Recovery Plan for Children and proposes strategies to understand and attenuate the impact of pandemic-related lockdown measures. Importantly, we need a monitoring strategy to assess indicators of child development in three areas of functioning: education and learning, health, and well-being (or mental health). Surveillance needs to begin in the critical prenatal period (with prenatal care to expectant parents), and extend to the end of formal high school/college education. Based on child development indicators, a stepped strategy for intervention, ranging from all-encompassing population-based health and education promotion initiatives to targeted prevention programs and targeted remedial/therapeutic interventions, can be offered. As proposed in the UN plan for recovery, ensuring healthy present and future generations involves a concerted and intensive intersectoral effort from the education, health, psychosocial services, and scientific communities.Selon les Nations Unis, les perturbations scolaires associées à la pandémie de COVID-19 pourraient mener à une « catastrophe générationnelle » en gaspillant un potentiel humain incalculable, sapant des décennies de progrès et exacerbant des inégalités bien ancrées. Le déploiement du vaccin chez les moins de 12 ans n’a pas débuté avant la rentrée scolaire 2021, ce qui laisse présager de nombreuses perturbations pour cette 3e année scolaire pandémique. Quel sera le legs des perturbations entrainées par la pandémie de COVID-19 en matière d’éducation et de bien-être dans 5, 10, ou 20 ans? Une relance durable dépendra des mesures prises pour prévenir l’impact négatif disproportionné sur les enfants/adolescents de milieux socioéconomiques défavorisés et ceux qui ont des défis d’apprentissage préexistants. Ce commentaire propose des stratégies pour comprendre et atténuer l’impact des perturbations pandémiques en se fondant sur les quatre articles de la présente « Section spéciale sur un plan de relance pour les enfants suite à la pandémie ». Trois lignes d’action prioritaires émergent à la lumière des connaissances scientifiques actuelles. Premièrement, le contexte pandémique met en évidence la nécessité d’accéder à données intersectorielles (éducation, santé, services psychosociaux) permettant de distinguer les conséquences à court et à long terme. Deuxièmement, il faut être prêt à déployer une stratégie interventionnelle par étape, avec des interventions universelles en promotion, jusqu’aux interventions plus ciblées et intensives. Troisièmement, il faudra mettre en place des programmes particuliers pour les enfants/adolescents de milieux défavorisés et pour ceux qui présentent des facteurs de risque personnels (défis de santé mentale, retards d’apprentissage). À titre d’exemple, le tutorat scolaire devrait être facilement accessible dans tous les milieux défavorisés. Tel que proposé dans le plan de relance de l’ONU, un effort concerté, intensif et intersectoriel de la part des sciences de l’éducation, de la santé, et des services psychosociaux sera nécessaire pour assurer la santé et l’éducation des générations présentes et futures

Anxiety following mild traumatic brain injury

Purpose/Objective: The goals of the present study were (1) to document the prevalence of anxiety-related disorders and anxiety symptoms at 4, 8, and 12 months post-injury in individuals with mild traumatic brain injury (mTBI) while considering pre-injury history of anxiety disorders and (2) to verify whether the presence of anxiety in the first months following mTBI was associated with more symptoms present one year after the injury. Research Method/Design: One hundred and twenty participants hospitalized after an accident and having sustained mTBI were assessed at 4, 8, and 12 months post-accident with the Mini-International Neuropsychiatric Interview, the Hospital Anxiety and Depression Scale and questionnaires assessing fatigue, irritability, perceived stress, cognitive difficulties, depression, insomnia, and pain. Results: At 4 months, 23.8% of participants presented with at least one anxiety-related disorder compared to 15.2% at 8 months and 11.2% at 12 months. Overall, 32.5% presented with at least one anxiety disorder over the first 12 months post-mTBI. Participants with a history of anxiety (20.5%) were significantly more anxious following their accident. Individuals who were anxious 4 months after the accident presented with more symptoms in different areas 12 months post-injury compared to non-anxious individuals. Conclusions/Implications: The present results highlight that anxiety should be evaluated and managed carefully as it appears to be a key factor in the persistence of other mTBI-related symptom