Background: The aim of this study was to evaluate the physical and chemical quality of groundwater in the villages of Qom province during summer 2014, and to compare the results with Iran’s Standard No. 1053. Methods: This research is a descriptive sectional study. During the investigation, one step sampling with the necessary repetitions (if necessary) was performed of each ...

I'lasma samples from 11 group of patients with .severe essential hypertension were formerly shown to have a cardiotonie action on the isolated frog heart. This effect is significantly greater than that observed with plasma from normal persons or those with other diseases. The material in plasma responsible for this action is a system of 3 proteins. These proteins have been distinguished by frac...

We report a facile and green chemical solution approach to synthesize monodisperse α-calcium sulfate hemihydrate (α-HH) nanoellipsoids with a length of 600 nm and a width of 300 nm by simply mixing Ca(2+) and SO4(2-) glycerol-water precursor solutions in the presence of Na2EDTA. The α-HH nanoellipsoid is formed through a Na2EDTA-mediated self-assembly of small primary building blocks (α-HH doma...

The effect of adsorption acid gases CO 2 , SO and 3 on the electron accepting ability cations surface calcium oxide was studied by low-temperature IR spectroscopy adsorbed CO. It is shown that formation carbonate, sulfite sulfate anions in layer leads to appearance Lewis sites, strength which, estimated shift vibration frequency molecules associated with them, increases appropriate order, appro...

The chondroitinases are bacterial lyases that specifically cleave chondroitin sulfate and/or dermatan sulfate glycosaminoglycans. One of these enzymes, chondroitinase ABC I from Proteus vulgaris, has the broadest substrate specificity and has been widely used to depolymerize these glycosaminoglycans. Biochemical and structural studies to investigate the active site of chondroitinase ABC I have ...

The results of studies the physico-chemical regularities acid decomposition magnesium-containing raw materials are presented and optimal technological mode individual stages obtaining magnesium sulfate is determined. It has been established that process based on dolomite includes following stages: with sulfuric acid; filtration resulting suspension separation calcium insoluble residue subsequen...

Tested water samples taken from the ophiolite region of Forumad show that most of the concentrations of calcium, magnesium, sodium, sulfate, potassium, bicarbonate, and nitrate elements are in the standard range. Hydrogeochemical studies of the water samples show the existence of magnesium sulfate, chloromagnesium, and chlorosodium. Results of measuring the physical properties of the water show...

?-Calcium sulfate hemihydrate (?-HH) is an important cementitious material, which can be prepared by hydrothermal method from calcium dihydrate (DH) in electrolyte solution. Study of the conversion kinetics DH to ?-HH NaCl solution helpful for understanding control process. In this paper, X-ray diffraction (XRD) patterns were applied study effect temperature on crystallization determine kinetic...

Bone grafting is the second most commonly performed procedure next to blood transfusion. Every year, 500,000 bone graft procedures are performed in the Unites States alone and 2.2 million procedures are performed worldwide. Th e approximate cost of these procedures is US$2.5 billion. Autograft is still considered the gold standard for bone grafting. Allografts and xenografts are commonly used. ...

INTRODUCTION: Many bone graft substitutes have become available to assist in increasing healing rates and decrease donor site morbidity resulting from orthopaedic procedures. Calcium sulfate is a widely used bone graft substitute, and is now available as a bone void filler as well as in pellets. We wished to examine: 1. The effect of a solid calcium sulphate cylinder in an intercalary defect in...