background epidermal growth factor (egf) plays a fundamental role in the healing of wounds relating to skin damage, the cornea, and the gastrointestinal tract. objectives the aim of this study is the cloning, expression, and purification of recombinant human egf (rhegf), and an assessment of its activity. materials and methods in the present experimental study, a synthetic pet28a (+) -hegf cons...

lipopolysaccharide (lps) is an important structural component of the outer cell membrane complex of gram-negative microorganisms. its causative role in gram-negative bacteria-induced diseases and broad applications in different kinds of cell stimulation experiments provided a conceptual basis for studies directed at the isolation, purification, and detailed chemical characterization of lps. the...

Available online 1 April 2009

Treatment of domestic wastewater, at both the village and urban level, remains a problem in most developing countries. This is a review paper illustrating the use of duckweed-based wastewater treatment systems that provide genuine solutions to these problems. They are inexpensive to install as well as to operate and maintain. They do not require expensive technologies. Therefore, this review pa...

A number of years ago the Green Chemistry Centre of Excellence at York discovered new high surface area forms of polysaccharides. Further study of these materials has found that after controlled thermal treatment they exhibit remarkable thermal properties, which have enabled us to make an entirely new class of materials with properties ranging from starch-like to carbon-like (see figure 1). Tra...

We give a review on entanglement purification for bipartite and multipartite quantum states, with the main focus on theoretical work carried out by our group in the last couple of years. We discuss entanglement purification in the context of quantum communication, where we emphasize its close relation to quantum error correction. Various bipartite and multipartite entanglement purification prot...

Small amounts of surfactant can drastically change bubble behavior. For example, a bubble in aqueous surfactant solution rises much slower than one in purified water. This phenomenon is explained by the so-called Marangoni effect caused by a nonuniform concentration distribution of surfactant along the bubble surface. In other words, a tangential shear stress appears on the bubble surface due t...

This paper deals with the purification of four proteins from Euphorbia characias latex, a copper amine oxidase, a nucleotide pyrophosphatase/phosphodiesterase, a peroxidase, and a purple acid phosphatase. These proteins, very different in molecular weight, in primary structure, and in the catalyzed reaction, are purified using identical preliminary steps of purification and by chromatographic m...

flocculation processes during estuarine mixing can reduce the elemental concentrations of river water. in the present investigation, natural flocculation processes concept is used to reduce the elemental contents of industrial wastewater. for this purpose, various amounts of saline water were added to an artificial industrial wastewater with known concentrations of heavy metals. the results of ...

background: factor vii concentrates are used in patients with congenital or acquired factor vii deficiency or treatment of hemophilia patients with inhibitors. in this research, immunoaffinity chromatography was used to purify factor vii from prothrombin complex (prothrombin-proconvertin-stuart factor-antihemophilic factor b or ppsb) which contains coagulation factors ii, vii, ix and x. the aim...