Electrodeposition and Anti-corrosive Properties of Polypyrrole Coatings on Stainless Steel

Electrochemical deposition of polypyrrole coatings on stainless steel was carried out by the constant potential technique. This study will provide a better understanding of the corrosion protection mechanism of the polypyrrole coating. The structure of the coating was determined by using Reflection Absorption Infrared Spectroscopy (RAIR). The RAIR peaks ratios of the characteristic peaks were used to monitor the changes in the structure of polymer with respect to the process parameters. The change in corrosion current with process parameter was correlated with the extent of oxidation of the polymer. The mean roughness, rms roughness and the 3-D morphology of the coatings obtained from Atomic Force Microscopy (AFM) were used to correlate the surface energy changes of the coatings

Age-Related and Side-Dependent Differences in Hip Range of Motion among Female Indian Athletes: Establishing Reference Values

Restricted hip mobility and flexibility are always associated with increased risk for lower extremity injury and poor athletic performance in female athletes. Reference values for hip motions in female athletes by age and sports are lacking. The primary aim of the study is to document the active and passive range of motion of hip joint among adolescent and adult Indian female athletes. Next, to compare between the sides and age group in the same population. This is a cross-sectional study involving 498 healthy female athletes of age group 15-21 years involved in the high impact sports were conveniently selected for the measurements of hip active and passive range of motion with a Universal goniometer. Participants with recent history of musculoskeletal injury and neurological pain syndromes were excluded from the study. Comparing the baseline values of active and passive range of motion of hip joint, between adolescent and adult female athletes, revealed a significant difference (p<0.05) in both dominant and non-dominant leg except for passive hip abduction (p>0.05). However, adolescents demonstrated higher hip flexion, internal rotation, and external rotation, and adults showed greater hip extension. Active and passive reference values for hip range of motion is documented for South Indian female athletes in relation to age and high impact sports. Future research involving injury prediction, prevention and rehabilitation protocol among female sports can utilize these values

Senescence Regulation by mTOR

International audienceThe senescence program is activated in response to diverse stress stimuli potentially compromising genetic stability and leads to an irreversible cell cycle arrest. The mTOR pathway plays a crucial role in the regulation of cell metabolism and cellular growth. The goal of this chapter is to present evidence linking these two processes, which have one common regulator-the tumor suppressor p53. While the role of mTOR in senescence is still controversial, recent papers have shed new light onto this issue. This review, far from being exhaustive given the complexity of the field, will hopefully stimulate further research in this domain, whose relevance for ageing is becoming increasingly documented