53 research outputs found
Eletrical conductivity and deterioration of soybean seeds exposed to different storage conditions
Comparação entre difração de raios X e "mĂ©todo do furo cego" para medição de tensĂ”es residuais em barras cilĂndricas
InfluĂȘncia do envelhecimento acelerado na anatomia da testa de sementes de soja, cv. Monsoy 8400
Factors Associated with Revision Surgery after Internal Fixation of Hip Fractures
Background: Femoral neck fractures are associated with high rates of revision surgery after management with internal fixation. Using data from the Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) trial evaluating methods of internal fixation in patients with femoral neck fractures, we investigated associations between baseline and surgical factors and the need for revision surgery to promote healing, relieve pain, treat infection or improve function over 24 months postsurgery. Additionally, we investigated factors associated with (1) hardware removal and (2) implant exchange from cancellous screws (CS) or sliding hip screw (SHS) to total hip arthroplasty, hemiarthroplasty, or another internal fixation device. Methods: We identified 15 potential factors a priori that may be associated with revision surgery, 7 with hardware removal, and 14 with implant exchange. We used multivariable Cox proportional hazards analyses in our investigation. Results: Factors associated with increased risk of revision surgery included: female sex, [hazard ratio (HR) 1.79, 95% confidence interval (CI) 1.25-2.50; P = 0.001], higher body mass index (fo
The Saharan debris flow: an insight into the mechanics of long runout submarine debris flows
Kinetics of electrophilic fluorination of steroids and epimerisation of fluorosteroids
Fluorinated steroids, which are synthesised by electrophilic fluorination, form a significant proportion of marketed pharmaceuticals. To gain quantitative information on fluorination at the 6âposition of steroids, we conducted kinetics studies on enol ester derivatives of progesterone, testosterone, cholestenone and hydrocortisone with a series of electrophilic NâF reagents. We explored the stereoselectivities of fluorination reactions of progesterone enol acetate and the kinetic effects of additives, including methanol and water. The kinetics of epimerisation of 6ÎČâfluoroprogesterone to the more pharmacologically active 6αâfluoroprogesterone isomer in HCl/acetic acid solutions are detailed
EFFECT OF SURFACE CONDITION AND PRIOR PLASTIC DEFORMATION ON X-RAY EFFECTIVE ELASTIC PARAMETERS IN A STEEL AND ITS WELD
Residual-stress determination by single-axis holographic interferometry and hole drillingâPart II: Experiments
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