polyamide 6 has been widely used in food packaging applications and also green tea contains amounts of antioxidant compounds. the aim of this study was investigation of green tea effects on properties of polyamide packaging polymer. polyamide 6 was dissolved in methanol which was saturated with calcium chloride. the active packaging film was produced by incorporation of methanol green tea extra...

this paper aims to evaluate the impact of several indices of market structure including entry to barrier, economies of scale and concentration degree on 140 active industries using the digit. accordingly, we apply three methods including cost disadvantages ratio ( ), herfindahl–hirschman concentration index ( ) and comanor and willson criterion in order to assess the economies of scale and usin...

Intestinal epithelial barrier defects, or increased paracellular permeability, were first reported in patients with Crohn's disease (CD) over 25 years ago. Although increased permeability may herald relapse to active disease, suggesting that impaired barrier function may contribute to progression, limited understanding of the mechanisms that create barrier defects in CD has made it impossible t...

there have been increasing interests in finding new and innovative solution for removal of contaminants from soils recently. in the present investigation, electro kinetic (ek) process coupled with activated carbon barrier to remove nickel from kaolinite clayey soil is investigated. laboratory tests were performed by applying a constant voltage to nominal electric field strength of 1 and 1.25 v/...

Humans can recognize and navigate in a room when its contents have been rearranged. Rats also adapt rapidly to movements of objects in a familiar environment. We therefore set out to investigate the neural machinery that underlies this capacity by further investigating the place cell-based map of the surroundings found in the rat hippocampus. We recorded from single CA1 pyramidal cells as rats ...

This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of two-layer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO2-8%Y2O3 and also a metallic bond coat...

There is much evidence to indicate that inter-hand coordination is temporally/spatially linked during maximal speed conditions. This linkage was examined across all limbs. In two experiments participants moved two limbs at maximal speed the same target distance (28 cm) while one limb negotiated a 20 cm vertical barrier. Experiment 1 demonstrated that the effects of a barrier hand on a non-barri...

Skin is at the interface between the complex physiology of the body and the external, often hostile, environment, and the semipermeable epidermal barrier prevents both the escape of moisture and the entry of infectious or toxic substances. Newborns with rare congenital barrier defects underscore the skin's essential role in a terrestrial environment and demonstrate the compensatory responses ev...

This paper studies barrier options which are chained together, each with payoff contingent on curved barriers. When the underlying asset price hits a primary curved barrier, a secondary barrier option is given to a primary barrier option holder. Then if the asset price hits another curved barrier, a third barrier option is given, and so on. We provide explicit price formulas for these options w...