polyethylene is a synthetic polymer which is used in our daily life for different purposes. increased use of polyethylene causes severe environmental problems. there are different methods to decrease problem caused by polyethylene for example source reduction, incineration and land filling and all of them have their own drawbacks. so, the best way to reduce the problem caused by polyethylene is...

biological packaging material based on obtained proteins from fish waste, are biopolymers that have the capability of biodegradable film formation. thus, purpose of this research is to study and investigate some of films’ physical features made from trout fish myofibril protein. the film forming solution containing 1.5%, 2% and 2.5%(w/v)myofibril protein isolate of 100ml solution and glycerol a...

Dental calculus, a type of stone formed even under normal conditions, plays an important role in some periodontal diseases. Deposition of dental calculus follows plaque formation, and the variations in the degree of calcification reflect the changes in environment and form of its lamellar structure[1]. Dental plaque is composed of rods, cocci and filamentous bacteria[2], and these morphological...

The Scanning Confocal Electron Microscope, is an instrument which permits the observation and characterization of sub-surface structures of thick, optically opaque materials at nanometer level resolutions. The instrument merges the capabilities of the scanning, transmission and x-ray microscopes, and achieves unprecedented resolutions in optically dense materials, by implementing the technology...

I t is now generally accepted that two distinct classes of lymphocytes are present in different species including man--thymus-derived (T) cells and bone marrow or bursalderived (B) cells (1, 2). Although similar in appearance these two cell types have been demonstrated to have widely different functions. They can be distinguished electrophoretically by their different mobility (3, 4), serologic...

A simplified methodology was developed to study the geometric form of multiple Bombyx mori Nucleopolyhedrovirus by scanning electron microscopy. The virus belongs to Baculoviridae family and was isolated from the silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae). The polyhedra of Nucleopolyhedrovirus were obtained from the filtrate, inoculum and hemolymph of the silkworm experimentally infect...

A scanning beam profile monitor is described that was developed for use along the Stanford two-mile linear accelerator. The maximum beam loss due to scattering caused by this monitor can be made to be a small fraction of that which would be caused by a Cerenkov radiator or scintillating screen. (To be submitted to the Review of Scientific Instruments) * Work supported by the U. S. Atomic Energy...