Background and Objectives: Solid Pseudo-Papillary Tumor (SPPT) is a benign and rare neoplasm which transforms to malignant from in fewer than 1 to 2 percent of cases. In more than 90% of the cases, it appears in young women ages 20 to 40 years old. Although SPPT is a benign tumor, it has special potential for mild malignancy. Case Report: The patient was an 18-year old woman with abdominal mass, headache, fever, chill, decreased appetite, pallor and dysuria who referred to Shahid Sadooghi hospital of Yazd, Iran in July 2007. In examination, a firm inflated, mobile, and painless mass with distinct borders was palpated in the left upper abdominal quadrant. This mass was 16 cm in diameter. In CT scan a large hypodense mass with thick wall and crossing the center line on the right side of spine was prominent. Microscopic evaluations after the surgery showed tumoral cells of small polyhedral core elliptical, pseudopapillary processes trabeculs with diffused fibrosis, atrophy acinar and mild infiltration of chronic inflammatory cells in the tumors margins. Conclusion: The final diagnosis in this patient was SPPT, a primary neoplasm of the pancreas. Its etiology is unknown and has low potential to turn into malignant form. It should be considered, especially in young women. Complete removal of the mass is the preferred treatment of the patients. Patients with local recurrence or metastasis can have long term survival after complete removal of the mass.

Introduction: Solid and cystic papillary epithelial neoplasm of pancreas is a rare neoplasm with low malignant potential which often occurs in young women. The tumor is usually large and encapsulated. Microscopic examination reveals small round cells with papillary-configuration in a delicate vascular stroma. Case Report: The cases presented in this report were 2 women at the age of 15 & 26 who were both injured by striking. Radiologic findings revealed retroperitoneal mass. Both patients have not had any problem after surgery yet.Conclusion: In this neoplasm, surgery is treatment of choice and definite diagnosis is made by histology and immunohistochemistry. Patients have excellent long-time prognosis.

The batch removal of Cr(VI) from aqueous Solution using lignocellulosic Solid wastes such as sawdust and pine leaves under different experimental conditions was investigated in this study. The influence of pH, temperature, contact time, initial concentration of Cr(VI) and particle size on the  chromium removal was investigated. Adsorption of Cr(VI) is highly pH-dependent and the results indicate that the optimum pH for the removal is 2. The capacity of chromium adsorption at equilibrium by these natural wastes increased with absorbent concentration. Temperature in the range of 20-60 °C showed a restricted effect on the adsorption capacity of pine leaves, but had a considerable effect on the adsorption capacity of sawdust. The capacity of chromium adsorption at the equilibrium increased with the decrease in particle sizes. The suitability of adsorbents was tested with Langmuir and Freundlich isotherms and their constants were evaluated. Results indicated that the Freundlich model gave a better fit to the experimental data in comparison with the Langmuir equation. The study showed that lignocellulosic Solid wastes such as sawdust and pine leaves can be used as effective adsorbents for removal of Cr(VI) from wastewater.  

Orpiment, getchellite and stibnite from Zarshuran deposit, NW Iran, exhibit extensive As-Sb substitution. There are four known minerals along As2S3-Sb2S3 join, i.e. orpiment (As2S3), Wakabayashilite [(As,Sb)20S30], getchellite (AsSbS3) and stibnite (Sb2S3). Extensive mineralogical studies by scanning electron microscope (SEM) and electron probe micro-analyzer (EPMA) indicate that getchellite from Zarshuran exhibits large As/Sb substitution, compared to the synthetic mineral and occurrences in other deposits, which justifies further experimental studies. Natural orpiment with the highest Sb content was recorded in Zarshuran samples. Considering the possible explanation for the incomplete record of Solid Solution, it appears that rapid variation in fluid chemistry and variability of As and Sb concentration in the hydrothermal Solution may have caused extensive Solid Solution in the As2S3-Sb2S3 system. The recorded Solid Solution may indicate that temperatures of gold mineralization were less than 250oC which is supported by fluid inclusion data.

In this research, the magnetic phase transition and anisotropic magnetoelastic effects of a polycrystalline sample of Ndl4Dy2Fe78sB6 were studied by susceptibility and magnetostriction measurements. The composition was prepared by casting method. SEM pictures and XRD analysis showed that it was composed of polycrystalline magnetic phases with the main phase of 2-14-1.Results of ac susceptibility measurements show that the sample undergoes a magnetic phase transition at about 130 K, which is due to a gradual spin reorientation accompanied with crystal structure distortion. Magnetostriction measurements in three orthogonal directions of the main body of the sample were performed in the range of 77 K to 300 K and if the field up to 1.5 T. At temperatures below 125 K, the magnetostriction values in three orthogonal directions differ by a factor of two to three. This anisotropy in magnetostriction indicates preferential orientation of the crystalline grains in the volume of the sample. In addition, magnetostriction curves show minimum values near the phase transition temperature with different values in the different directions. Minimum values of magnetostriction can be explained by the critical behavior of the orbital magnetic moments of the Fe atoms at the phase transition temperature.

Considerable progress has been made in characterizing and understanding the properties of polyaniline doped with some protonic acids. In this work polyaniline was synthesized by chemical method in the presence of HCI, then undoped polyaniline was obtained with NH3 Solution. The undoped polyaniline was doped with the protonic acid such as sulphosalicylic; acid, salicylic acid and citric acid. The protonic acids can be used to dope poly-aniline (PANI) by mixing a protonic acid in common solvents such as N-methyl pyrrolidone and dimethylformamide. The structure and properties of protonic acid doped-PANI are investigated by UV-vis, IR and conductivity measurement. It is found that the PANI, therein, is doped by protonation of imine nitrogen. In the case of protonation-doped PANI, polarons/bipolarons are generated as reflected in the presence of UV-vis absorption peaks at 420 and 850 nm. The minimum amount of appropriate acid to obtain optimum level of doping was estimated by UV spectroscopy. Also polyaniline base Was doped with these acids by blending in the Solid-state. The electrical conductivity in the Solid state increased several times after heating the mixture and increasing the heating time. The dependence of the electrical conductivity on the composition of blends differs for the partly protonated polyaniline and mixtures of protonated polyaniline with an excess acid.