0000000000147362
AUTHOR
D Gutierrez
showing 2 related works from this author
Transparent thermoplastic polyurethanes based on aliphatic diisocyanates and polycarbonate diol
2016
Segmented thermoplastic polyurethanes (PUs) were synthetized using polycarbonate diol as soft segment with a molar mass of 500 and as a hard segment 1,5-pentanediol with a combination of isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI). Differential scanning calorimetry, differential mechanical analysis, Fourier transform infrared-attenuated total reflection spectroscopy, haze, transmittance, hardness, tensile properties and retention of tensile properties tests were employed to characterize the different PUs. The results of this study show that IPDI/HDI relation has a significant impact on the phase mixing, crystallinity and therefore on the PU’s properties. The variati…
Iron deficiency risk factors in infants at one year: A cross-sectional study
1985
A cross-sectional study was performed to assess the relative importance of well-known risk factors for iron deficiency in one-year-old children and to detect new ones. Serum ferritin, erythrocyte protoporphyrin and haemoglobin were used as diagnostic tools to screen for iron deficiency. Epidemiologic analysis of data included measures of association, potential impact and a log-linear model to obtain adjusted measures. Socioeconomic variables show a strong association with iron deficiency (low income, odds ratio = 5.07, UCL = 16.08, LCL = 1.60; unemployed father, odds ratio = 4.16, UCL = 14.94, LCL = 1.16; emigration, odds ratio = 9.14, UCL = 54.56, LCL = 1.53). Some errors in feeding practi…