maximizing economic earnings is the most common goal in cut-off grade optimization of open-pit mining operations. when this is the case, the price of the product has a critical effect on optimum value of cut-off grade. this paper investigates the relationship between optimum cut-off grade and price to maximize total cash flow and net percent value (npv) of operation. in order to visualize this ...

the effects of aflatoxin (af) (0.0 and 0.5m g kg-1) and high grade sodium bentonite (hgsb) (5, 7.5 and 10 g kg-1) were tested in an in vivo study including 8 dietary treatments with three replicates of 14 birds per diet per replicate, using a total of 336 broiler chicks up to five weeks. results showed that chicks receiving af contaminated feed had significantly (p≤ 0.05) suppressed body weight...

background & aim: the most common primary brain tumors of the central nervous system are gliomas. among a number of different biomolecular events, a strong relation between oxidative stress pathways and the development of this cancer has been proved. oxidative stress (os) is the consequence of an imbalance between pro-oxidants and antioxidants towards pro-oxidants. the pro-oxidants cause lipid ...

background: hepatitis activity index (hai) and fibrosing stage are two important findings during the evaluation of liver samples in patients with chronic hepatitis b. the aim of this study was to determine the hai and fibrosing stage in patients with anti-hbe positive chronic hepatitis b. methods: liver biopsy slides of 72 patients were evaluated at the department of pathology in two teaching h...

background : cd117 is a thyrosin kinase receptor encoded by c-kit proto-oncogene. it is expressed during normal development in some tissues and also in a subset of neoplasia especially gastrointestinal stromal tumors   (gists). treatment with thyrosin kinase inhibitors (e.g., imatinib) is useful in cd117- positive gists. the goal of this study is to investigate the expression of cd117 in glial ...

In recent years, two concepts similar to /?-sequences have appeared, essential sequences and asymptotic sequences. This work explores the general nature of such sequences. Introduction. In the last three years, two concepts similar to that of Ä-sequences have appeared, asymptotic sequences and essential sequences. Motivated by these examples, this paper will study the general nature of such seq...

background and aims: p504s (amacr) is a mitochondrial enzyme expressed in renal cell carcinoma. some of immunohistochemical markers in renal cell tumors are independent prognostic factor and show relation with histologic grading. amacr expression increases with higher histological grading in different tumors; however, in rcc it is not obvious. in this study, we tried to investigate if any relat...

abstractbackgroundand endotracheal intubation under direct vision in both anticipated and unexpecteddifficult intubation situations.: the lma ctrach system is a new device for airway managementmethodsdifferent types of elective surgeries. after randomly selecting the patients for intubationwith this new device, the airway characteristics, height, weight, dental overbiteand thyromental distance ...

introduction: serum c-reactive protein (crp) is believed to be increased in metastatic urothelial cancer of the bladder. however, the changes depend on the stage and grade of the upper tract urothelial carcinoma (utuc). this study aimed to compare low-range and high-range serum crp and haptoglobin in new cases of utuc. materials and methods: blood was collected from newly diagnosed patients wit...