cosmic rays in the upper troposphere (9000 meters to 15000 meters) initiate the followingnuclear chemical reaction: 1n + 14n => 14c + 1h. previous research has shown a strong effect of latitude onthe abundance of neutrons from cosmic rays. however, to date, there has been little exploration of therelationship between the latitude effect for cosmic-ray neutrons and latitudinal variations of stab...

nano-sized titanium dioxide tio2 powder was successfully prepared from its precursor titanium (iv) chloride by a simple and new wet chemical method. ticl4 were used as precursor in hydrogen peroxide, h2o2 and ethanol. this solution was then peptized using nitric acid and heated under reflux at 80°c. their physico-chemical properties were then characterized by transmission electron microscopy (t...

abstract background: pressure ulcer is one of the main concerns of nurses in medical centers around the world, which, if untreated, causes irreparable problems for patients. in recent years, nitric oxide (no) has been proposed as an effective method for wound healing. this study was conducted to determine the effect of nitric oxide on pressure ulcer healing. materials and methods: in this clini...

abstract background: nitric oxide (no) is a molecule that incorporates in many physiological processes of female reproductive system. recent studies suggested the possible role of endothelial isoform of nitric oxide synthase (enos) enzyme in female infertility. objective: the aim of this study is to evaluate the expression of endothelial nitric oxide synthase in endometrial tissue of women with...

it has been shown that nitric oxide is synthesized in the central nervous system as well as in vascular endothelial cells. recently, it was reported that nitric oxide was involved in central cardiovascular regulation, baroreflex modulation, and involved in a reciprocal release with excitatory amino acids in the nucleus tractus solitarii of rats. the purpose of the present study was to investiga...

background: clomiphene citrate (cc) is the first line agent used for ovulation induction in patients with polycystic ovarian syndrome (pcos). however, there is marked discrepancy between the ovulation and pregnancy rates achieved, which may be attributed to the undesirable effect of cc on cervical mucus and endometrium. objective: the aim of this study was to evaluate the effect of isosorbid mo...

objective(s):dependence and tolerance to opioid analgesics are major problems limiting their clinical application. a-terpineol is a monoterpenoid alcohol with neuroprotective effects which is found in several medicinal plants such as myrtus communis, laurus nobilis, and stachys byzantina. it has been shown that some of these medicinal plants such as s. byzantina attenuate dependence and toleran...

the aim of this study was to investigate the effects of nigella sativa  (ns) fixed oil in comparison to dexamethasone (dex) on inducible nitric oxide synthase (inos), peripheral blood eosinophils (pbe), allergen specific serum igg1 and interleukins and airway inflammation in a murine model of allergic asthma. thirty-one mice were divided into four groups. group  i (n =  6) served as the control...

background and purpose: during recent years, nitric oxide (no) has been considered as a molecule involved in migraine headaches. this free radical involves in initiation of migraine headaches via no/cgmp signaling pathway and vascular relaxation specially big intracranial arteries. therefore, we studied the effects of aqueous extract of origanum vulgare and melilotus officinalis prescribed in m...