Plastics are inexpensive, lightweight and durable materials, which can readily be moulded into a variety of products that find use in a wide range of applications. As a consequence, the production of plastics has increased markedly over the last 60 years. However, current levels of their usage and disposal generate several environmental problems. Around 4 per cent of world oil and gas productio...

In our recent study we showed that single-component emulsion drops, stabilized by proper surfactants, can spontaneously break symmetry and transform into various polygonal shapes during cooling [ Denkov Nature 2015 , 528 , 392 - 395 ]. This process involves the formation of a plastic rotator phase of self-assembled oil molecules beneath the drop surface. The plastic phase spontaneously forms a ...

Phthalates, an alkyl aryl esters of 1, 2 benzenedicarboxylic acids are widely used as plasticizer. They show low water solubility, high oil solubility, high octanol-to-water partition coefficient and low volatility. Phthalates are easily released into the packed food because there is no covalent bond between the phthalates and plastics in which they are mixed. Phthalates may cause major ill eff...

By using of combining theoretical model with empirical model, the nonlinear viscoelastic-plastic constitutive equations of soybean and cottonseed were developed on the basis of the creep test. The parameter inverse problem of constitutive model was proposed using improved particles swarm optimization. Numerical simulations of creep of soybean and cottonseed were carried out. The definition of c...

Scientific substantiation and practical confirmation of possibility, expediency and efficiency of application of the ultrasonic superficial plastic deformation in zones of welded connections after performance of welding works is given. For this purpose a mathematical model of process of superficial plastic deformation is represent, as the hypercycle of loading consisting of elementary cycles – ...

Microplates with integrated optical oxygen sensors are a new tool to study metabolic rates and enzyme activities. Precise measurements are possible only if oxygen exchange between the sample and the environment is known. In this study we quantify gas exchange in plastic microplates. Dissolved oxygen was detected using either an oxygen-sensitive film fixed at the bottom of each well or a needle-...

Interstitial application of paraffin in plastic and reconstructive surgery is obsolete due to the development of permanent and extensive foreign body granulomas at the site of application. These granulomas can cause severe physical impairment and develop their own prognostic worth. Furthermore, the disperse oil droplets are not a locally stable suspension. Therefore, the desired aesthetic aspec...

This study assesses the suitability of Fourier transform infrared spectrometer (FTIR) and Raman spectroscopy for potential use as analytical tools to determine the diffusivity of a migrant in a plastic packaging material, one of the key points in safety assessment of food-contact materials. Despite its relative low sensitivity, FTIR-based analysis supplied data for the material on desorption of...

Abstract Aim: Veterans may have improper eating behaviors and food habits. Therefore, this study is designed to investigate the eating behaviors and food habits of veterans via the nutritional knowledge, attitude, and practices (KAP) model in Zahedan City. Methodology: In a descriptive, cross-sectional study, 369 veterans admitted to the Veterans Foundation in Zahedan were selected. After re...