The model given in this report and the rotating disk method provide a useful combination in the study of dental enamel and hydroxyapatite dissolution kinetics. The present approach is a significant improvement over earlier studies, and both the ionic activity product that governs the dissolution reaction and the apparent surface dissolution reaction rate constant may be simultaneously obtained....

an aquifer located within a petroleum processing plant in moín, costa rica, suffers hydrocarbon pollution. this study aimed to determine the ability of indigenous microorganisms from this site to degrade polycyclic aromatic hydrocarbons (pahs) to evaluate the feasibility of an eventual bioremediation process. aerobic conditions were found in the aquifer, while microbial analyses of the groundw...

Despite the critical role of erythropoietin (EPO) as therapeutic agent in treatment of anemia, its consumption is limited due to several disadvantages including the product short half-life, immunogenicity and susceptibility to proteolytic degradation. To overcome these drawbacks efficient methods such as site-specific PEGylation have been developed among witch N-terminal PEGylation has found mo...

the most important environmental pollutant in steel industry is air pollution due to the process of its products. optimise sitting for this industry, in a great extend will prevent pollutants and emissions. khorasan steel company is located near some populous villages and three rivers. it is necessary to perform an investigation for providing abatement and control of air pollution, in time of p...

the increasing world demand for fish cannot be met by capture fisheries. aquaculture production is increasing and nowadays cage culture has an important role in meeting the world’s fish demand. the design of the physical structure of a cage is determined by the oceanographic conditions of the culture site. each design is site-specific and knowledge of the topography, wind force and direction, p...

background: many studies have been done in order to interpret correctly the results of ethanol analysis and its related problems. unfortunately, it was not easy to determine bac rate, due to postmortem different conditions or personal and clinical differences in metabolism and excretion of ethanol. the time between death and autopsy, the environmental conditions (temperature and humidity) are i...

The prerequisite of maintaining an efficient and safe mining operation is the proper design of a mine by considering all aspects. The first step in a coal mine design is a realistic geometrical modelling of the coal seam(s). The structural features such as faults and folding must be reliably implemented in 3D seam models. Upon having a consistent seam model, the attributes such as calorific val...

Cities are among the most fragile biological settlements due to their complex internal structure and the influence by different variables. Given the realities of these settlements, in the event of devastating events such as earthquakes, these cities are definitely more fragile; consequently, returning to normal life seems to be much longer and costly. Therefore, considering the importance of th...

Cities are among the most fragile biological settlements due to their complex internal structure and the influence by different variables. Given the realities of these settlements, in the event of devastating events such as earthquakes, these cities are definitely more fragile; consequently, returning to normal life seems to be much longer and costly. Therefore, considering the importance of th...