The Ce/ Ce redox system was studied to initiate the grafting of idustrial cellulose pulp with vinyl acetate monomer. The parameters of the copolymerization reaction (reaction time, temperature, monomer and initiator contentration, freeness, chemical composition of the cellulose) were investigated and their effects are discussed.

We propose a mean-field theory of chemical and physical planar brushes of linear gradient copolymers swollen in a selective solvent. The polymer chains are grafted to the substrate by the ends with the excess of insoluble monomer units, and the majority of the soluble units are located near the free ends of the chains. The grafting points are considered to be immobile (chemical brush) and mobil...

Abstract This review is the third part of a series reviews on hydrophobization lignocellulosic materials, relevant topic nowadays, due to need replace fossil fuel-based materials. The provides an overview materials by polymer adsorption, and both chemical radiation-induced grafting polymers. While adsorbed polymers are only attached surfaces physical interactions, grafted chemically bonded Radi...

objective: to compare outcome of patients with burns covering less than 15% of total body surface area(tbsa) undergoing early excision and grafting or delayed skin grafting. method : this was a non-randomized clinical trial including 54 patients with less than 15% tbsa burn referring to ghotboddin hospital of shiraz. they were assigned to two study groups, each group including 27 patients: the ...

in order to study the effect of rootstock, scion and some methods of grafting and budding to achieve the best methods of grafting in pomegranate, split factorial experiment was conducted in a completely randomized design in march 2013 in greenhouse at the agricultural college of vali-e-asr university of rafsanjan. factors included rootstock, scion, and methods of grafting and time of grafting. ...

A variety of revision treatments available for managing different types scars, including laser therapy, chemical peeling, cryotherapy, dermabrasion, soft tissue augmentation, intralesional steroid injection, and surgical excision. Rhytides, dyschromias, specific kinds scars are among the epidermal dermal lesions that successfully treated using erbium YAG lasers. In this study, use Erbium to tre...

this study aims at exploring an effective route in the in situ graft polymerization of aniline from fe3o4 nanoparticles. to this goal, fe3o4 magnetic nanoparticles were prepared by coprecipitation method using ammonia solution as the precipitating agent, and were characterized by fourier transform infrared (ft-ir) spectroscopy, x-ray diffraction (xrd) and transmission electron microscopy (tem)....

Tyrosinase was used to initiate the grafting of peptides onto the amine-containing polysaccharide chitosan. Chemical evidence for covalent grafting was obtained from electrospray mass spectrometry for products formed from reactions with glucosamine (the monomeric unit of chitosan) and the model dipeptide Tyr-Ala. When this model dipeptide was incubated with tyrosinase and chitosan, there was a ...

For the synthesis of biocomposite materials for useful applications, it becomes necessary to modify the surface of natural fibers through chemical treatments. Morphology, structure and properties of natural fibers have an obvious effect on the mechanical properties of the biocomposite materials. It is thus necessary to know the morphology, thermal stability and crystalline behavior of original ...