Rétention aiguë d'urine

Résumé

La est l'incapacité soudaine pour un individu d'émettre des urines alors qu'il a la vessie pleine. Le volume de la vessie augmente alors. On parle parfois ainsi de globe vésical. La capacité de la vessie est importante, mais le volume déclenchant l'envie de miction est d'environ pour un adulte. Elle était appelée anciennement « ischurie ». Diagnostic Symptômes

Douleurs au niveau de l'hypogastre
Absence d'émission d'urines depuis plusieurs heures
Confusion, un état d'agitation. Il peut apparaître au-delà d'un certain volume d'urine, la rétention.

Examen physique L'examen physique montre une masse dans le bas ventre, au-dessus du pubis, arrondie, tendue, et mate à la percussion. Diagnostic différentiel

Anurie : absence de production d'urine lors d'un état de choc.
Fécalome : peut être associé, peut entraîner une rétention aiguë d'urines et peut être une autre cause de confusion.

Autres formes Rétention urinaire chr

Source officielle

https://fr.wikipedia.org/wiki/R%C3%A9tention_aigu%C3%AB_d'urine

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Suppressing Crystallization of Water-in-Salt Electrolytes by Asymmetric Anions Enables Low-Temperature Operation of High-Voltage Aqueous Batteries

Corsin Battaglia, David Reber

The discovery of enhanced electrochemical stability for aqueous electrolytes with very high salt concentration has stimulated the development of high-voltage aqueous batteries. We show that a key factor limiting the applicability of these batteries is the tendency of highly concentrated electrolytes to crystallize near room temperature, leading to cell failure. Here we report the use of asymmetric anions as solution to suppress the crystallization of highly concentrated aqueous electrolytes. We demonstrate this approach with a ternary sodium-ion electrolyte that we employ in a 2 V class aqueous sodiumion battery based on a NaTi2(PO4)(3) anode and a Na-3 (VOPO4)(2) F cathode. This cell displays excellent cycling stability at 30 degrees C with capacity retention of 85% after 100 cycles at C/5 and 77% after 500 cycles at 1C. The cell reaches a specific energy of 64 Wh kg(-1) on the basis of the active masses of both electrodes, twice as high as previously reported for this electrode couple. Further, the cell can be operated down to temperatures of at least -10 degrees C, with capacity retention of 74% after 500 cycles at C/5.

AMER CHEMICAL SOC2019

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Tailoring the redox-active transition metal content to enhance cycling stability in cation-disordered rock-salt oxides

Corsin Battaglia, Yining Li, Yong Yang, Chunyang Zhang

Lithium-excess cation-disordered rock-salt oxides (DRXs) are investigated intensively as cathode materials for future lithium-ion batteries combining cationic and anionic redox reactions. However, the lattice oxygen redox can cause severe oxygen release resulting in rapid capacity fading. Here, we investigate a series of xLi(2)TiO(3)-(1 - x)LiMnO2 (0

ELSEVIER2021

Chargement

During cytokinesis in budding yeast (Saccharomyces cerevisiae) damaged proteins are distributed asymmetrically between the daughter and the mother cell. Retention of damaged proteins is a crucial mechanism ensuring a healthy daughter cell with full replicative potential and an ageing mother cell. However, the protein quality control (PQC) system is tuned for optimal reproduction success which suggests optimal health and size of the population, rather than long-term survival of the mother cell. Modelling retention of damage as an adaptable mechanism, we propose two damage retention strategies to find an optimal way of decreasing damage retention efficiency to maximize population size and minimize the damage in the individual yeast cell. A pedigree model is used to investigate the impact of small variations in the strategies over the whole population. These impacts are based on the altruistic effects of damage retention mechanism and are measured by a cost function whose minimum value provides the optimal health and size of the population. We showed that fluctuations in the cost function allow yeast cell to continuously vary its strategy, suggesting that optimal reproduction success is a local minimum of the cost function. Our results suggest that a rapid decrease in the efficiency of damage retention, at the time when the mother cell is almost exhausted, produces fewer daughters with high levels of damaged proteins. In addition, retaining more damage during the early divisions increases the number of healthy daughters in the population. (C) 2019 Elsevier Ltd. All rights reserved.

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD2019

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