In this study, the influence of the incorporation of eucalyptus (EO), tea tree (TT) and rosemary (RO) essential oils and Chiriyuyo extract (CE) on the structure and properties of thermoplastic starch (TPS) obtained fr...
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In this study, the influence of the incorporation of eucalyptus (EO), tea tree (TT) and rosemary (RO) essential oils and Chiriyuyo extract (CE) on the structure and properties of thermoplastic starch (TPS) obtained from potato starch, glycerin and water was evaluated. All oils and the extract were used at a concentration of 0.5 g/100 g of TPS, while for TT, the effect of the concentration was also studied. The mixtures obtained were processed by extrusion and thermocompression molding. The sheets were characterized by XRD, FTIR, TGA, SEM and analyses of their mechanical properties, antimicrobial characteristics and biodegradability. The results show that the use of small concentrations of the oils in 70TPS does not induce changes in the TPS structure according to the results of XRD, FTIR and TGA, with each essential oil and CE affecting the mechanical properties unevenly, although in all cases, antimicrobial activity was obtained, and the biodegradability of TPS in soil was not modified. An increase in the concentration of TT in 60TPS causes marked changes in the crystallinity of TPS, providing a greater modulus with a higher concentration of TT. Regardless of the amount of TT, all sheets maintain antimicrobial characteristics, and their biodegradation in soil is delayed with a higher oil content.
Purpose:White matter damage of immaturity may affect visual,motor and cognitive *** multiple-case study presents standardized perimetry results in six teenagers and young adults born prematurely with visual dysfunctio...
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Purpose:White matter damage of immaturity may affect visual,motor and cognitive *** multiple-case study presents standardized perimetry results in six teenagers and young adults born prematurely with visual dysfunction due to white matter damage of immaturity of pre-or perinatal ***:Six subjects,aged 13-25 years,born at a gestational age of 28-34 weeks,with white matter damage of immaturity documented by MRI,and optic disc appearances documented by fundus photography,were examined with manual and computerized quantitative ***:All subjects had subnormal visual field(VF)function,although the depth and extension of the VF defects differed between *** inferior VF function was more deviant than the superior in all *** concordance between the VF defects detected with the different techniques was good,although the static computerized techniques revealed slightly more ***:White matter damage of immaturity may affect the *** lower VF is often more affected than the *** abnormalities can be demonstrated by both manual and computerized perimetry.
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