background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...

A number p is a safe prime if both p and (p − 1)/2 are prime. This note describes a method of generating safe primes that is considerably faster than repeatedly generating random primes q until p = 2q + 1 is also prime.

Moso bamboo is recognized as phytoremediation plant due to production of huge biomass and high tolerance in stressed environment. Hydroponics and pot experiments were conducted to investigate mechanism of copper tolerance and to evaluate copper accumulation capacity of Moso bamboo. In hydroponics experiment there was non significant variation in MDA contents of leaves compared with control. SOD...

Abstract Taking CuPb 20 Sn 5 as the research object, /Carbon steel bimetallic sample was prepared by solid-liquid compound method, and relationship between microstructure friction properties of layer. The results show that Cu 3 P δ (Cu 31 8 ) phases in are distributed α-Cu to improve wear resistance alloy. coefficient fluctuates range 0.057~0.093, when load 150 N-350 N. When speed exceeds 3.86 ...

WHO defines Safe Injection, as an injection that does no harm to recipients; does not expose the health care worker to any risk; and does not result in waste that is dangerous for the community. In India, 300 crore injections are given in an year out of which 180 crore are unsafe; diseases transmitted through unsafe injection practices include hepatitis B: 21million, hepatitis C: 2 million, and...

Graphene has proved its significant role as a reinforcement material in improving the strength of polymers as well as metal matrix composites due to its excellent mechanical properties. In addition, graphene is also shown to block dislocation motion in a nanolayered metal-graphene composites resulting in ultra high strength. In the present paper, we demonstrate the synthesis of very hard Cu-Gra...

A microcanonical unimolecular rate theory (MURT) model incorporating quantized surface vibrations and Rice-Ramsperger-Kassel-Marcus rate constants is applied to a benchmark system for gas-surface reaction dynamics, the activated dissociative chemisorption and associative desorption of hydrogen on Cu(111). Both molecular translation parallel to the surface and rotation are treated as spectator d...

Article history: Received 9 January 2014 Accepted 24 June 2014 Available online 1 July 2014 Compositional patterning in dilute Cu1 xFex (x 12%) induced by 1.8 MeV Kr irradiation was studied as a function of temperature using atom probe tomography. Irradiation near room temperature led to homogenization of the sample, whereas irradiation at 300 C and above led to precipitation and macroscopic co...