Atomistic structures of〈0001〉tilt grain boundaries in a textured Mg thin film

In a textured Mg thin film, two types of 〈0001〉 tilt grain boundaries are identified by electron microscopy and atomistic simulation. Coincidence site lattice and dislocation models are applied to study boundaries in hexagonal close-packed crystals.</jats:p

Characterization and Synthesis of Magnetite Nanoparticles by Innovative Sonochemical Method

AbstractMagnetite nanoparticles are of great interest for biomedical applications such as contrast agents in MRI, drug delivery, gene therapy and tissue engineering. In this study, in order to obtain nanoparticles with narrow size distribution and united shape, reverse coprecipitation method was done under ultrasound. Structural analysis was done using XRD and FTIR. The XRD result was analyzed using Scherrer method and formation of spinel structure with was confirmed. The crystallite size and lattice parameters were calculated 17.7nm and 8.358°A respectively. FTIR peaks were observed in wave number and confirms the structure. Magnetic properties of the MNPs was studied using VSM and the saturation magnetization (Ms) and the coercive field of the MNPs is 63.13emu/g and 9.10e respectively which indicates appropriate magnetic properties in biomedical applications. Transmission electron microscope (TEM) was done to observe the morphology of magnetite nanoparticles

Relationship Between The Breast Cancer History And Prostate Cancer In Relatives With Prostate Cancer

BACKGROUND AND OBJECTIVE: The family history of breast and prostatism cancer is a risk factor for prostate cancer. Considering the common pathogens for prostate and breast cancers, the aim of this study was to determine the relationship between the patient's prostate cancer and their first and second-class relatives with the history of breast cancer. METHODS: This case-control study was conducted on 300 patients who underwent biopsy in Shahid Beheshti hospital due to prostate enlargement. Patients were divided into two groups based on biopsy: a) prostate cancer in case group and benign prostate enlargement in control group. Additional information of the first and second-class relatives of patients was collected in the checklist and evaluated. The patients (150 control, 150 experimental) were selected using simple sampling method. The experimental and control groups who underwent biopsy suffered from prostate cancer and benign prostate enlargement, respectively. Additional information was collected in the checklist and evaluated for patients in the first and second grade families. FINDINGS: The mean age of patients was 72.17±9.788 and 70.01±9.921 in case and control group, respectively. The frequency of breast cancer in the family of patients with prostate cancer and healthy persons was 16 (59.3%) and 11 (40.3%), respectively and the frequency of prostate cancer was 26(17.3%) and 2(1.3%), respectively (p <0.001). The frequency of breast cancer was greater in first than second grade familie in both groups. In both groups, the history of breast cancer was higher in patients older than 40 years. CONCLUSION: The results of the study indicated that the frequency of prostate cancer is probably higher if the first and second-class relatives affect with prostate cancer than breast cancer

Effects of replacing dietary fish oil with canola oil on growth indices, survival rate and body chemical composition of rainbow trout (Oncorhynchus mykiss) fingerling

This study was conducted to evaluate the effects of replacing dietary fish oil with canola oil on growth indices, survival rate and body chemical composition of rainbow trout (Oncorhynchus mykiss) fingerling. For this purpose, three experimental diets were prepared with the same protein level (40%) and fat levels of 100% )First diet with 10% fish oil, second diet with 100% canola oil and third diet with 50% fish oil and 50% canola oil with three replicates). Then 405 fingerling rainbow trout with an average weight of 11±1 g and a density of 45 in 9 ponds were fed in experimental diets for 8 weeks. Based on the results, the combination of 5% fish oil and 5% canola oil in the ration improved the growth indices including: final weight, Increase Body Weight (BWI), Special Growth Ratio (SGR) and Condition Factor (CF) and showed a significant difference with other treatments and the highest amount was observed in 10% fish oil treatment (p<0.05). However, there was no significant difference between treatments in terms of survival rate and protein, fat, ash and moisture content of fish carcasses (p>0.05). Based on the results of this study, replacing part of canola oil with fish oil (50% fish oil with 50% canola oil) in rainbow trout diet has a positive effect on growth indices and can reduce costs by reducing the length of breeding period.Publishe