Measurements of reaction cross section (σR) for some proton-rich nuclei (N = 8, 10, 12 isotones) on carbon target at intermediate energies have been performed on RIBLL of HIRFL by a transmission ...method. The experimental σR values for 23Al and 27P are abnormally large compared with its neighboring nuclei and that of 17F has an enhancement compared with neighboring isotopes. The calculation of relativistic density-dependent Hartree (RDDH) approach shows there is proton-halo structure in 23Al and 27P and there is a proton-skin in 17F. The significance of these measurements was discussed.
Modified atmosphere packaging (MAP) emerged in the 1970s as a new technology that may extend life of perishable agricultural produce. However, if proper precautions are not taken this technology may ...also risk the microbiological safety of the packaged food. Perforated films enable MAP to maintain H2O-saturation with only a slight change in O2 and CO2. This results in reduction of water loss and alleviation of water stress without the possible deleterious effects of anaerobiosis or CO2 damage. New trends of research are in the development of interactive or 'smart' films. These new films may be expected somehow to sense the changing internal packaging environment and admit oxygen from the outer atmosphere or allow excess CO2 to escape. Modified humidity packaging, combined with incorporation of fungicides into films, heat treatment, etc., are new, promising lines of research. Mathematical modelling for gas exchange in MAP is based on a combination of Fick's Law and the Michaelis-Menten equation. This model enables production of the optimal parameters of a package. Surface coatings have gained some commercial uses due to the availability of edible and natural origin coatings.
Experiments showed that using perforated polyolefin films for mango packaging enabled normal ripening and reduced weight loss and decay compared to a non-sealed control. Delayed ripening of mangoes ...sealed in non-perforated film was advantageous during prolonged storage. Bell-peppers in sealed-tray packages with modified humidity had lower weight loss and retained better firmness and quality than a non-sealed control.
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