introduction: osseous tissue developes via either endochondral (ec) or intramemberanous (im) ossification. the bone matrix gelatin (bmg) from both developmental types can induce bone formation when implanted in the muscle of the rat. in this research, the resorption of im-bmg particles, inductivity of im-bmg and the nature of heterotropic calcification was evaluated at implantation site. materi...

Mollusca is the largest marine, phylum about 23% of all the named marine organism.1 The gastropods, more commonly known as snails and slugs, are a large taxonomic class within the phylum Mollusca according for 80% of total mollusca.2 Fresh water gastropods are divided in to two subclasses, Prosobranchia and Pulmonata. Most of the species associated as intermediate hosts of helminthes parasite.3...

Nowadays, kriging has been accepted as the most common method of grade estimation in mineral resource evaluation stage. Access to the crisp assay data and a variogram model are the necessary means for the utilization of this method. Since fitting a crisp variogram model is generally difficult, if not impossible, the fitted theoretical model is usually tainted with uncertainty due to various rea...

introduction iron-apatite ore deposits well known as kiruna iron type formed in association with calc-alkaline volcanism from proterozoic to tertiary (hitzman et al., 1992). liquid immiscibility in an igneous system was proposed to explain the formation of the iron oxides accompanying apatite in mineralized zones (förster and jafarzadeh, 1994; daliran, 1999). the mode of ore formation however, ...

introduction the mahour exploration area is a polymetallic system containing copper, zinc and silver. the mineralization can be seen in two forms of veins and disseminations. this area is structurally within the lut block, west of deh-salm village. recent exploration work and studies carried out by geologists on this volcanic-plutonic area of lut demonstate its importance indicating new reserve...

A general purpose plasma reactor has been designed and built to be used in various fields such as metallurgy, and microelectronics. The important aspects of the system design are : (a) the chamber can be evacuated to a base pressure of approximately 5 X 10-7 Tom; (b) capabilities for thermal bake out at 150°C, and nitrogen pre-burn at a pressure of about 3 X 10-3 Torr; (c) substrate holder whic...

A review is given of the present status of several of the main areas of investigation of the IV-VI compounds, with the emphasis placed on problems that still have to be solved. It would be presumptuous of me to give a critique of all of the diverse things that have been discussed at this conference, since we have covered quite a lot of ground. I shall simply try to point out some things that I ...