the present study describes the fragmentation under electron ionization (ei) of gas phase serine and threonine amino acids. ab initio methods were performed to calculate the fragmentation paths and interpret the mass spectra. the six lowest energy conformers of l-serine, l-threonine and l-allo-threonine were obtained with b3lyp, g3mp2 and mp2 methods. the adiabatic and vertical ionization energ...

this study examined the possible effects of lycopene at physiological dosage and body fat mass on the humoral immune response in patients with type 2 diabetes mellitus (t2dm). a total of 35 patients with typ2 diabetes mellitus from both sexes aged 54±9 yrs from the iranian diabetes society were introduced into a double blind placebo controlled clinical trial conducted for 2 months. after a 2-we...

background cholera is a bacterial infection that causes both local outbreaks and worldwide pandemics. there was a cholera epidemic in iran in summer 2005, during which 1118 individuals were infected and 11 died. the present study was conducted to determine the impact of educational activities of iranian ministry of health on the people's knowledge and attitude towards the disease. patients and ...

the effects of five different foods including: blood worm, artemia cyst, artemia mass powder, gammarus mass powder and ordinary commercial food were studied on siamese fighting fish (bettasplendens) propagation efficiency during thirty days in a randomize totally design with 4 repeats .experimental plots had been consisted of twenty 30*30*40 (cm) aquarium which a pair of male and female brood s...

background: women engaged with polycystic ovarian syndrome (pcos), as the commonest endocrine disorder, are known to have a specific type of adiposity. birth weight is among different contributors reported to be responsible for this diversity. objective: we aimed to compare the relation between birth weight and body fat mass (bfm)/ body lean mass (blm) in pcos and their age and body mass index ...

there has been a highly significant increase in the number of patients with malignant mediastinal tumors in the last four decades. since these lesions are infrequently encountered and there are very few reports in iran concerning this issue, we performed this study to review our institutional experience of medias-tinal masses and to compare differences in the clinical spectrum between our study...

the fna (fine needle aspiration) procedure is simple, inexpensive, available and a safe method for the diagnosis of a neck mass. fna has numerous advantages over open surgical biopsies as an initial diagnostic tool; therefore we decided to compare the accuracy of this method with open biopsy. this retrospective as well as descriptive study comparing preoperative fna results with existing data i...

mobile luminal mass of aortic arch is an unusual finding in patients with peripheral embolization. to search the source of these emboli, aortic arch mass should be considered. to our knowledge, transesophageal echocardiography (tee) can be a useful modality to demonstrate the nature and exact location of the mass. this report is illustrative of a large mobile aortic arch mass, histologically th...

osteoporosis is a major public health problem in iran. bone densitometry is used to diagnose osteopenia and osteoporosis and if necessary, prevent bone fractures, especially that of femoral neck. bone density is related to several factors including race, age, sex, environmental factors and nutrition. no comprehensive study has been performed in iran, yet. among the 10 to 75 year-old population ...

The new techniques in seismic design of structures are usually attributed to high damping ratios. In such systems, the assumption of classical (i.e. proportional) damping is not valid and in most cases they should be considered as Non-classical systems. Since the analytical tools for studying the behavior of such structures are not easily available, the present work attempts to find the limits,...