coalbed methane (cbm) plays an important role in coal mining safety and natural gas production. in this work, the cbm potential of b2 seam in parvadeh iv coal deposit, in central iran, was evaluated using a combination of local regression and geostatistical methods. as there were 30 sparse methane sampling points in the parvadeh iv coal deposit, no valid variogram was achieved for the methane c...

Two hundred samples were taken from various sites in Iran, including coal storage areas, waste water in the Tabas and Zirab coal mines, and sulphur containing acid springs in Ramsar and Abask , and were screened for Thlobacillus ferruuxidans. During this investigation , seven strains were isolated which could oxidize sdphm , pyrite , thiosdphate and ferrous iron as the sole energy source. Macr...

pomegranate (punica granatum. l) is one of the popular edible fruits believed to be native iran. it is presently widely grown in many other tropical and subtropical countries. in this study, anthocyanin profiles for four cultivars of iranian pomegranate (punica granatum. l) juice were determined and quantified through high-performance liquid chromatography coupled to uv-vis detector (hplc-uv) u...

Background: Anemia is one of the most important nutritional disorders among children and adolescent in Iran and developing countries. Despite the possibility of anemia prevention, there is a high proportion of this problem in school children and especially infants. The aim of this study was to determine the prevalence rate of anemia in 6 to 12 months old children. Methods: This was a cross-sec...

Introduction: Quaternary basalts are one of the last signs of magmatism in Iran, some of which are related to deep fractures and active faults in the Quaternary. Quaternary basalts of Tabas are very important due to their high expansion and location in eastern Iran, and are located 140 km south east of Tabas city and according to the proposed divisions are part of the Lut zone. The aim of this...

In underground excavation, where the road-headers are employed, a precise prediction of the road-header performance has a vital role in the economy of the project. In this paper, a new model is developed for prediction of the road-header performance using the non-linear multivariate regression analysis. This model is able to estimate the instantaneous cutting rate (ICR) of roadheader based on r...

Braces with intentional eccentricity (BIE) are recently proposed to improve the seismic behaviour of conventional buckling braces (CBBs) by inserting along brace length. Due this and resultant bending moment, BIE bends uniformly from small storey drifts moves smoothly into postbuckling under compression sustains trilinear tension. This delays appearance midlength local which causes unstable ene...