background neuroblastoma is the most common extracranial malignant solid tumor in children under 5 years, and it is characterized by wide clinical and biological heterogeneity. n-myc oncogene amplification is considered to be one of the most important prognostic factors used to evaluate survival in these patients. objectives the aim of our study was to determine amplification of the n-myc oncog...

The mesoscopic reaction-diffusion master equation (RDME) is a popular modeling framework frequently applied to stochastic reaction-diffusion kinetics in systems biology. The RDME is derived from assumptions about the underlying physical properties of the system, and it may produce unphysical results for models where those assumptions fail. In that case, other more comprehensive models are bette...

background: nanoparticles have wide range of application while there are some reports regarding their probable effects on male reproductive system and spermatozoa. objective:  the aim of this study was to evaluate the effect of different doses of silver nanoparticles (agnps) (70nm) on acrosome of rat spermatozoa and number of spermatogenic cells. materials and methods:  in this experimental stu...

results 162 yeast species from 250 specimens were isolated in sabroud dextrose agar (sda) medium. 106 (65.4%) of them were germ tube formation positive, 86 (53%) chlamydoconidium formation positive and 101(62.4%) were pcr positive. yeast cells and mycelia were detected in the isolates on direct microscopic examination. c. albicans accounted for 66.04% of cases and 34% were non-c. albicans speci...

allergy to prosopis juliflora (mesquite) pollen is one of the common causes of respiratory allergy in tropical countries. mesquite is widely used as street trees in towns and ornamental shade trees in parks and gardens throughout arid and semiarid regions of iran. the inhalation of mesquite pollen and several species of amaranthus/chenopodiaceae family is the most important cause of allergic re...

to assess nickel-induced toxicity in plants, zea mays seeds were germinated and cultured on nutrient solution with nickel concentrations of 0, 50, 100 and 200 μm for a period of two weeks. its effects on the growth, hill reaction and photosynthetic pigments content were then investigated. the fresh and dry weight of leaves and roots increased in 50 μm nickel, but decreased in 100 and 200 μm. th...

the reaction of ch₃nh₂ with o₂ on the singlet potential energy surfaces (pes) was carried out using the b3lyp, ccsd(t) and g3b3 theoretical approaches along with 6-311++g(3df,3pd) basis set. the suggested mechanism for the title reaction consists of one pre-reactive complex. from the pre-reactive complex, nine types of products, ch2nh+h2o2, ch3nh+ooh, nh2cho+h2o, ch2nho+h2o, nh3+hcooh, ch2nh+h2...

desmoplastic fibroma is a rare, locally aggressive, benign lesion. a case of desmoplastic fibroma of left side of mandible is reported. the lesion presented as painless mass in left posterior portion of mandible of a 7-year-old girl. histologically the lesion was composed of interlacing fascicles of benign appearing fibroblast in a varying ground substance of collagenous tissue. in this report,...