OBJECTIVE Epidermal growth factor (EGF) is believed to be one of the most potent growth factors for the thyroid gland. DESIGN AND METHODS We tested plasma EGF concentrations (radioreceptor method) in patients with non-toxic nodular goitre (NNG). Blood samples from patients with NNG were collected on the day before the surgery, during subtotal thyroidectomy (sTx)--from peripheral and thyroid v...

Contamination of water resources with toxic elements is one of the challenges of thetoday's world. In this research, application of Goethite nanoparticles in removingcontamination of arsenic and mercury from synthetic wastewater in a batch mode isinvestigated. For this purpose, the effect of different factors including pH, adsorbent dosage,contac...

b ackgro un d : the antimicrobial activity of silver nanoparticles has been investigated in medical fields in recent years, but there are few studies regarding its effect on oral microorganisms. the aim of the present study was to evaluate the in vitro antimicrobial and toxicity properties of nanosilver against two dental plaque microorganisms  and human gingival fibroblast (hgf) cell line. me ...

: heavy metals are chemical pollutants characterized by their toxicity, stability, bioaccumulation and biomagnification. they might accumulate in aquatic organisms, transfer through food chain and enter into human body. therefore, the study of their accumulation in the edible aquatic species has been a very important part of ecological and monitoring investigations. astacus leptodactylus is a b...

diabetes mellitus (dm) is a metabolic disorder resulting from a defect in insulin secretion, insulin action or both. despite the fact that it has a worldwide high prevalence, morbidity and mortality, it is regarded as a non–curable but controllable disease. in addition to different synthetic drugs, plant remedies and dietary traditions play an effective role in treatment. teucrium polium l. is ...

introduction: one class of magnetic nanoparticles is magnetic iron oxide nanoparticles (mions) which has been widely offered because of their many advantages. because of extensive application of mions in biomedicine, before they can be used in vivo, their cytotoxicity must be investigated. therefore, there is an urgent need for understanding the potential risks associated with mions. materials ...

environmental pollution by various pollutants is one of the most important problems of this century. at least 20 elements, including chromium have been classified in toxic metals group, that half of them are released in the environment in excessive amounts of standards. chromium is a toxic pollutant that is widely spread in the environment and exists in cement and concrete. the aim of this stud...

objective: cutaneous leishmaniasis is an endemic infectious disease considered to be a crucial health problem in many countries, including iran. as such, there is a need for new medications with few side effects. in the present research we have studied the effect of artimisinin on  leishmania major (l. major) and cell death in vitro. methods: a specific number of promastigotes of l. major were ...