Supplementation with a Polyphenol-Rich Extract, PerfLoad®, Improves Physical Performance during High-Intensity Exercise: A Randomized, Double Blind, Crossover Trial.

Workout capacity is energy-production driven. To produce peak metabolic power outputs, the organism predominantly relies more on anaerobic metabolism, but this undoubtedly has a negative and limiting impact on muscle function and performance. The aim of the study was to evaluate if an innovative polyphenol-based food supplement, PerfLoad®, was able to improve metabolic homeostasis and physical performance during high-intensity exercises under anaerobic conditions. The effect of a supplementation has been investigated on fifteen recreationally-active male athletes during a randomized, double-blind and crossover clinical investigation. The Wingate test, an inducer of an unbalanced metabolism associated to oxidative stress, was used to assess maximum anaerobic power during a high-intensity exercise on a cycle ergometer. Supplementation with PerfLoad® correlated with a significant increase in total power output (5%), maximal peak power output (3.7%), and average power developed (5%), without inducing more fatigue or greater heart rate. Instead, oxidative homeostasis was stabilized in supplemented subjects. Such results demonstrated that PerfLoad® is a natural and efficient solution capable of, similarly to training benefits, helping athletes to improve their physical performance, while balancing their metabolism and reducing exercise-induced oxidative stress.Actividad Física y Deport

Hydrogen embrittlement risk of high strength galvanized steel in contact with alkaline media

The critical conditions for hydrogenembrittlement (HE) risk of highstrengthgalvanizedsteel (HSGS) wires and tendons exposed to alkaline concrete pore solutions have been evaluated by means of electrochemical and mechanical testing. There is a relationship between the hydrogenembrittlementrisk in HSGS and the length of hydrogen evolution process in alkalinemedia. The galvanizedsteel suffers anodic dissolution simultaneously to the hydrogen evolution which does not stop until the passivation process is completed. HSGS wires exposed to a very highalkalinemedia have showed HE risk with loss in mechanical properties only if long periods with hydrogen evolution process take place with a simultaneous intensive galvanized coating reduction

Honey, a Gift from Nature to Health and Beauty: A Review

Benefits of honey are contributed by the composition of its elements such as glucose, fructose, glucose oxidase, vitamins and phenolic compounds. For health, honey can be used to treat wounds due to the antibacterial activity conferred by the hydrogen peroxide produced by glucose oxidase in honey. Anti-inflammatory, anti-oxidant, deodorizing and tissue regeneration activities in honey also help in the wound healing process. It can also be an alternative sweetener for diabetic patients to ensure compliance to a healthy diet. Moreover, honey exerts several effects such as lowering low density lipids and increasing high density lipids, thus reducing risk of atherosclerosis. In terms of beauty, honey can be used on skin and hair. It moisturizes skin through its natural humectant properties contributed by high contents of fructose and glucose. Honey treats acne on the skin due to its antibacterial activity, anti-inflammatory action and tissue repair. The hair can benefit from honey in such a way that the hair has abundance, and becomes easier to comb. However, there have not been as many studies regarding the use of honey in skin in comparison to its use for health. Therefore, future studies on honey could research its use, action and benefits in both cosmetics and dermatology

Scholarly Publication in a Changing Academic Landscape: Models for Success

Scholarly Publication in a Changing Academic Landscape focuses on ways contingent faculty members can join scholarly conversations by making public the work they are already engaged in and how they might publish their way into increased fulfillment and increased job security. Recognizing that contingent faculty often find few opportunities to enroll in publication courses, take advantage of professional development and mentoring sessions, or find allies and peers within their departments, this volume outline the realities of contingent employment and offers concrete advice for maintaining a research and publishing agenda, even without department support. The authors suggest ways to work within the present system, offering concrete strategies for engaging in professional development opportunities and disseminating research findings.https://digitalcommons.kennesaw.edu/facbooks2014/1026/thumbnail.jp

Hydrogen embrittlement of prestressing cables

cited By 38International audienceIn this study, hydrogen embrittlement is simulated in an accelerated way with an ammonium thiocyanate media test. Damage evolution of prestressing strand is monitored with electrochemical measurements and with acoustic emission (AE). Three stages of the damage mechanism are identified with different acoustic activities. For each stage, three pattern parameters coming from AE analyse are highlighted to distinguish each emitting stage. To have a precise description of damage evolution of prestressing cables during the hydrogen embrittlement test, some interrupted tests have been used. For each interruption, metallographic observations enable to characterize degradation mechanisms. Finally, each acoustic stage has been correlated to a degradation mechanism. © 2010 Elsevier Ltd. All rights reserved

Hydrogen embrittlement risk of high strength galvanized steel in contact with alkaline media

The critical conditions for hydrogen embrittlement (HE) risk of high strength galvanized steel (HSGS) wires and tendons exposed to alkaline concrete pore solutions have been evaluated by means of electrochemical and mechanical testing. There is a relationship between the hydrogen embrittlement risk in HSGS and the length of hydrogen evolution process in alkaline media. The galvanized steel suffers anodic dissolution simultaneously to the hydrogen evolution which does not stop until the passivation process is completed. HSGS wires exposed to a very high alkaline media have showed HE risk with loss in mechanical properties only if long periods with hydrogen evolution process take place with a simultaneous intensive galvanized coating reduction.Peer reviewe

Der Conseil d’État und sein Einfluss auf die Verwaltungsgerichtsbarkeit in Europa – Historische Betrachtung und Ausblick (§ 142)

National audienc

Intérêt de l'application de la technique d'émission acoustique dans la détection de la corrosion sous contrainte des câbles tendus utilisés dans les ouvrages d'art

Schématiquement, dans des ouvrages précontraints, le béton assure la résistance à la compression et la protection des câbles d'acier de précontrainte qui reprennent les efforts de traction et limitent la fissuration du béton tout en donnant de la ductilité à l'élément composite. L'une des causes principales de l'endommagement de ces infrastructures est la dégradation par corrosion sous contrainte de ces câbles tendus à 80% de leur charge à la rupture. Cette corrosion est souvent provoquée par l'évolution des propriétés physicochimiques du coulis de ciment liée à la pénétration d'agents agressifs tels que les carbonates, les chlorures, les sulfates. Ces éléments conduisent à la dépassivation des aciers et dans certains cas entraînent une corrosion sous contrainte des câbles. La surveillance de cette corrosion est rendue difficile du fait de l'inaccessibilité de ces câbles. L'émergence de techniques d'études et de contrôles non destructifs, telles que l'Emission Acoustique (EA), a permis des avancées significatives dans l'étude de divers cas de corrosion de nature mixte (corrosion sous contrainte, corrosion feuilletante, corrosion abrasion ). Cette étude a pour objectif la détermination et l'optimisation des possibilités offertes par la technique d'émission acoustique afin de l'intégrer au domaine du génie civil, pour la détection de la corrosion sous contrainte (liée aux chlorures ou à la fragilisation par l'hydrogène) des câbles tendus utilisés dans les ouvrages d'art. Dans ce travail, effectué au laboratoire MATEIS de l'INSA de Lyon et en partenariat avec le laboratoire LCPC de Nantes, nous avons étudié, dans divers milieux fortement alcalins et chlorurés, le comportement à la corrosion localisée (corrosion par piqûre) de ces câbles par des mesures électrochimiques (courbes de polarisation et diagrammes d'impédance). Puis, nous avons suivi par émission acoustique l'effet de cette corrosion sur l'endommagement de ces câbles mis sous tension à 80 % de leur charge de rupture. L'analyse des paramètres acoustiques (durée, nombre de coups, temps de montée et fréquence des signaux) a montré la présence de trois phases : 1- l'amorçage des fissures liées à la propagation des piqûres, 2- la propagation et la croissance des fissures en mode I et II, 3- la rupture finale due à la contrainte mécanique