The use of plastic film in agriculture has the serious drawback of producing vast quantities of waste. In this work, films were prepared from natural fibers and biodegradable polymers as potential substitutes for the conventional non-biodegradable plastic film used as mulching material in agricultural production. The physical properties (e.g., mechanical properties, heat preservation, water per...

Plasticine strips are rolled between cylindrical rollers to model the phenomenon of material transfer in metal rolling. Strips of thin plastic film ‘clingfilm’) on the plasticine strip are used to model the oxide layer that covers the surface of aluminium. The effect of gaps opening up between he clingfilm strips is investigated. It is found that the percentage area of the exposed strip giving ...

In arid climates, the optical properties of plastic-covered greenhouses deteriorate very quickly. To examine effect greenhouse shape and orientation on degradation rate cover properties, four prototypes were constructed in two shapes (duo-pitched roof tunnel), covered with a 200 µm thick low-density polyethylene film. Two types oriented North–South direction, other East–West all exposed for one...

aluminum is very sensitive to oxidation reactions. if a fresh surface of melt is exposed to air, it oxidizes quickly and an oxide layer covers the melt surface. new oxide films formed in a very short time during casting are thin and folded. the metal surface can be folded and create a double-oxide film as a result of the melt turbulence. the entrance of this double-oxide film into the melt is o...

Abstract. Agricultural plastic covers made from polyethylene (PE) and polypropylene (PP) provide increased yields an improved crop quality. However, such are suspected of partially breaking down into smaller debris thereby contributing to soil pollution with microplastics. To scrutinize this, we randomly sampled 240 topsoil cores (0–5 cm) eight fields which were covered fleeces, perforated foil...

An elastoplastic phase field model is developed to investigate the role of lateral confinement on morphology of thin films grown heteroepitaxially on patterned substrates. Parameters of the model are chosen to represent InxGa1-xAs thin films growing on GaAs patterned with SiO2. We determined the effect of misfit strain on morphology of thin films grown in 0.5μm patterns with non-uniform deposit...

The objective of this study was to test the hypothesis that ultrasound covers and sonographic gels, used during vaginal ultrasound, are toxic for mouse embryonic development in vitro. A prospective randomized design was used on pronucleate ova of F1 hybrid CBA x C57Bl female mice. The mice were superovulated with pregnant mare's serum gonadotrophin and human chorionic gonadotrophin and mated wi...

for button mushrooms packaging, the packaging films with high permeability to oxygen and carbon dioxide are required. permeability of plastic films such as pvc lead to loss of weight (and thus economic value) and textural changes are undesirable for button mushroom. so packaging film of polyolefins (pd 941 and pd 961) can be used. also the new film, hydrophilic materials such as films made from...