The most important aspects of heap LEACHING is it"s potential to produce uranium at lower costs, if it is applied to a suitable ore deposit. Prior to set up a heap at industrial scale, it is necessary to collect data on LEACHING behavior of the ore by laboratory column LEACHING tests. This paper discusses the research work performed to determine permeability of the ore,the consumption of chemicals, the composition of leach solution and influence of effective parameters on uranium recovery. A laboratory system was developed for simultaneous column LEACHING test on 6 column with 6 different samples coming from different points of ore body at the same time.Tests were carried out on 3 samples (2 column of each), 1. Main ore body 2. Representative sample from ores 3. Radiometric concentrate of surface sample Dependence of the recovery with the treatment condition, time (d), L/S (l/t), acid(kg/t) oxidant (kg/t), PH, EMF were studied. As a result the recovery of U was more than 90% for a period of 3 weeks and (98% in 4 weeks) while the consumption of acid was 55kg/t.

A mathematical model is described which has been developed to analyse flow through a restructured soil during LEACHING with the Horizontal LEACHING Technique. This new technique has been developed through field work in Turkey and Jamaica. The proposed model was based on field data compiled in Jamaica and it reveals that LEACHING will be much more effective in the upper more permeable horizons of the soil than it will be in the less permeable deeper layers. The model indicates that management of ponding on the surface of. the field can be achieved by controlling the rate of water application. Increasing the distance to the installed drainage system will increase the amount of salt that has to be leached and also reduce the rate of flow through the soil to the drain.

An experimental study was conducted to determine the effects of the LEACHING parameters on impurity ion concentrations of the liquid phase in ulexite LEACHING. Powdered ulexite ore was leached in an aqueous medium with sulfur dioxide. The Taguchi experimental design approach and statistical methods were used to evaluate the effects of the LEACHING parameters (solid/liquid ratio, temperature, pH, particle size, time) on impurity ion concentrations (concentrations of magnesium, calcium, iron ions) in the liquid phase. The average B2O3 LEACHING ratio of ulexite ore was found as 98. 56 % (± 0. 95). Statistically effective LEACHING parameters on impurity concentrations (and delta values for concentrations) were found as pH (770 ppm) for magnesium, solid/liquid ratio (372 ppm) for calcium ion concentrations. The examined parameters were not found effective for iron ion concentrations.

Background: Dry cough is the most common adverse effect and limiting factor of all angiotensin converting-ENZYME inhibitors (ACEIs). Prostaglandins have been pinpointed as playing an important role in the genesis of this problem. This double blind clinical trial desinged to study the efficacy of 500 milligram (mg) of aspirin comparing with placebo in controlling Enalapril-induced cough. Methods: The subjects were 32 patients who had developed Enalapril-induced cough. They were randomized into two groups: a group of daily dose of aspirin, 500 mg and a group of placebo for a treatment period of 4 weeks. Mean of cough severity was compared between two groups before treatment and weekly, until 4 weeks. Results: Mean of cough severity in aspirin and placebo groups before and at the end of first week of treatment did not show any significant difference. After the second, third, and fourth weeks, cough severity scores were significantly reduced in aspirin group (p<0.001). Conclusion: 500mg aspirin, once daily, can suppress or abolish Enalapril-induced cough and this finding proposes alternative therapeutic approach for ACEIs-induced related cough.        

The present work examines LEACHING of lipoxygenase-1 from soybean flour employing stirred tank vessel. The effect of operating parameters, impellers speed, operational period, temperature, pH and scale-up were considered. The acetic acid pH: 5.2 increased the LEACHING of lipoxygenase- 1. The sensitivity of agitator speed and geometrical-scale-up on the ENZYME LEACHING has been conducted. The effect of agitator speed on the geometrically-scaled- up reactor has shown that similar amount of ENZYME is leached at lower speed. The result is in para with the conventional system. The importance of operational period from 5 to 50 min on the ENZYME LEACHING was evaluated and higher ENZYME LEACHING obtained within 10 min. of operation. The Sigmaplot-6 for statistical verification and developing a correlation for the ENZYME LEACHING was used.

Background and aim: Dermatophytosis (tinea, ringworm) is the infection of skin, hair or nail that is caused by various keratinophilic fungi (dermatophytes). Dermatophytosis is a common infection throughout the world including all parts of Iran. As conventional laboratory procedures for identification of different dermatophytes are slow or lack specificity, more rapid and reliable methods are still required.Materials and methods: Dermatophyte fungi were isolated from patients with dermatophytosis and preliminarily identified by macroscopic and microscopic morphological criteria. Total cellular DNA was extracted from isolates using conical grinder. ITSI-5.8s-ITS2 region of rDNA region was amplified by the universal fungal primers ITSI and ITS4 and digested with EcoRII ENZYME.Results: 650-750 bp bands was produced, as expected. Digestion of the PCR products with the Restriction ENZYME EcoRII produced different electrophoretic pattern and allowed us the identification and differentiation of common pathogenic dermatophytes including Trichophyton rubrum, T.interdigital, T. mentagrophytes, T. tonsurans, T.violaceum, T. schoenleinii, T. verrucosum, M.canis, M.gypseum and Epidermophyton floccosum.Conclusion: It seems that this PCR-restriction ENZYME (PCR-RE) profile is a rapid and reliable tool for discrimination of important dermatophytes and can be an applicable method in reference medical mycology laboratories for diagnostic, as well as for large-scale epidemiological purposes.

Proper management of saline soils needs adequate information about the amount and salt distribution in the root zone. Irrigation is one of the factors that control the distribution of salt. This study investigated soil LEACHING simulation by using HYDRUS2D Software based on the evaporation of soil surface of a land without plant located at Shahid Chamran University, Ahwaz, Iran. Samples were taken from three distances of 0, 20, and 40 cm from the drip irrigation emitter and 0-20, 20-40, 40-60 and 60-80 cm depths. Among the measured depths, the 20- 40 cm layer was revealed as the best working depths with a salt content of 5.7 mg/cm3, while the depth of 60-80 cm had an average salinity of 10.87 mg/cm3, the highest salt content compared with the other depths. Soil salinity decreased with time and irrigation. At the last irrigation, soil salinity under the dripper reached a salinity of 2.13 mg/cm3 that was 1.15 of the initial amount. Salts movement in soil and LEACHING simulation by HYDRUS2D software showed that this software simulated salt distribution well.

The reclamation of saline‐ sodic soils is an important issue in agriculture and agronomy programs. In arid and semiarid areas, rainfall is not sufficient for LEACHING of salts from root zone and excess of soluble salts in the soil root zone can reduce water uptake of the plant. This is due to the decrease in the osmotic potential of soil solution and also degradation of soil structure because of sodium which could be toxic to the plant. In this field study reclamation of saline‐sodic soils at four stations in Minab, south of Iran was investigated. The experimental design of the study was double‐ring. The LEACHING was investigated up to 100 cm depth of soil. As the LEACHING process continued, soluble salts were washed away from soils profile of the agronomy programs and the salinity of the soil surface layer were reduced to a level suitable for cultivation of salt tolerant and semitolerant plants.

The LEACHING kinetics of smithsonite ore in acetic acid solutions, an environmental friend, and natural reagent was investigated. The influence of parameters such as reaction temperature, particle size, solid-liquid ratio and acid concentration was studied in order to reveal the LEACHING kinetics of smithsonite ore. In this study, experimental and statistical methods were carried out in order to analyze the kinetics data to investigate a kinetics model which describes the dissolution. The results indicate that the unreacted shrinking core model for fluid-solid heterogeneous reactions was favorable for the LEACHING process. The apparent activation energy of the LEACHING process was found as 74 kJ/ mol. It was determined that the LEACHING rate of smithsonite was controlled by the chemical reaction below: (1-x)1/3=3.7×105e-74/RTt.

Background and aim: Malassezia species are part of the resident skin flora of humans. These yeasts are associated with various superficial diseases, including seborrheic dermatitis, atopic dermatitis, dandruff, and psoriasis. Various DNA-based molecular methods have been recently described to differentiate species of Malassezia. In this survey, a simple, reliable, and cost effective PCR-based method was applied for differentiation of Malassezia species isolated from pityriasis versicolor patients in Iran.Materials and Methods: In this study 83 clinical isolates from pityriasis versicolor patients were analyzed. A PCR-based technique using restriction ENZYME digestion was applied for identification of Malassezia species.Results: The most frequently isolated species were M. globosa, followed by M.furfur, M. sympodialis, M. restricta and M.slooffiae. Species of M. packydermatis and M. obtusa were not seen.Conclusion: As M. sympodialis is the most prevalent species in the skin of healthy individuals, isolation of M. globosa as the dominant species from pityriasis versicolor lesions, suggests more virulent factors in this species.