the volatile oil obtained by hydrodistillation of the aerial parts of matricaria chamomilla l. (asteraceae) growing in botanical garden, isfahan university of medical sciences, iran, was investigated by gas chromatography (gc) and gc/ mass spectrometery (ms). sixty-three components were characterized, representing 86.21% of the total oil components detected. α-bisabolol oxide a (25.01%) and a-b...

various polymorphisms on endothelial nitric oxide synthase (enos) gene cause reduced production of no, the endothelial relaxing factor, and may accelerate the process of atherosclerosis. the study designed to investigate the frequency of t-786c polymorphism of the enos gene in patients suffering from coronary artery disease (cad) in north-west of iran. one hundred twenty subjects including 60 p...

recent studies have established that sex hormones directly or indirectly affect t and b cells and macrophages by manipulating the production of cytokines. in this study the possibility of the effect of 5a-dht on macrophage (mφ) nitric oxide (no) release via interleukin-l, 6 (ll-1β, il-6) or tumor necrosis factor-a (tnfα) was investigated. the endogenous cytokines il-1β, il-6 and tnf-α were neut...

helitropium europaeum l. population garmsar was shown to contain three major alkaloids: heliotrine n-oxide (2), lasiocarpine (4) and lasiocarpine n-oxide (5); and four minor alkaloids: heliotrine (i), europine (3), acetyllasiocarpine (6) and a novel alkaloid acetyllasiocarpine n-oxide (7).

the surface and interfacial analysis of silicon oxide film on silicon substrate is particularly crucial in the nano-electronic devices. for this purpose, series of experiments have been demonstrated to grow oxide film on si (111) substrate. then these films have been used to study the structure of the film by using x-ray photo emission spectroscopy (xps) technique. the obtained results indicate...

background: skin flap grafting is a popular approach for reconstruction of critical skin and underlying soft tissue injuries. in a previous study, we demonstrated the beneficial effects of two 5α-reductase inhibitors, azelaic acid and finasteride, on tissue survival in a rat model of skin flap grafting. in the current study, we investigated the involvement of nitric oxide and inducible nitric o...

gas sensitive metal oxide layers used in fabrication of resistive gas sensors are prepared by different deposition techniques. the technical data reported on some basic and practically important specifications of these devices, although fabricated based on the same gas sensitive oxide, are anomalously different. the influence of the fabrication technique used for the deposition of the gas sensi...

double layer zno/sno2 thin film resistive gas sensors were fabricated by successive pvd of those oxides onto porcelain substrates. the metallic contacts were provided by electron beam evaporation of platinum onto substrates prior to deposition of the gas sensitive layers. deposits were thermally annealed at different temperatures. it was shown that the activation energy of electrical conduction...

introduction: ferric sulfate pulpotomy is a safe and effective method of the pulpotomy of primary teeth. but the results of different studies indicate low success rate of ferric sulfate pulpotomy in comparison to formocresol pulpotomy and a portion of these failures may be related to stimulating and harmful effects of zinc oxide eugenol paste. the aim of this study was to determine and compare ...

the use of an inorganic phase in water-in-oil (w/o) microemulsion has recently received considerable attention for preparing metal oxide nanoparticles. this is a technique, which allows preparation of ultrafine metal oxide nanoparticles within the size range 40 to 80 nm. preparation of nano chromium (iii) oxide studied investigated in the inverse microemulsion system. therefore the nucleation o...