the alternative double bonds and conjugation in the polyene compounds are one of the main properties in these compounds. each carbon-carbon bonds in a polyene compound along the chain has appreciable double-bond character. the p-electrons are therefore not localized but are relatively free to move throughout the entire carbon skeleton as an one-dimensional box. the skeleton be considered as a r...

anti-money laundering act of 1386 granted authority to the supreme council to ratify regulations required by the law. the council adopted bylaws, approved in 1388, but with powers that have been delegated to him under the pretext of some of the crimes emerging technology in the modern criminal justice deficiencies in the law to coordinate with the international instruments such as the palermo c...

abstract background: were made each week during year 2002 from samples of atmospheric aerosols filtered from theair at tehran nuclear research center.measurement of gross beta activities and cosmogenic beryllium-7 concentrationsmaterials and methodssampler at the nuclear research center meteorological station in tehran (40contents of samples were determined with semiconductor gamma spectrometry...

extended abstract   introduction the most important indicator of climate in a region is vegetation community. climate can be different over large areas, because of changes in vegetation community. vegetation influences weather and climate in its surrounding areas mostly by way of evapotranspiration and albedo so they play a role in the earth’s energy balance. these effects on the earth’s energy...

thermoluminescence (tl) dating was established in oxford to fulfil the demand for dating ceramics and other heated man made products (aitken, 1985).  it determines the time elapsed since the mineral grains have been heated. following the establishment of tl dating method, it was used to date fired materials such as pottery, flint and etc. optically stimulated luminescence (osl) determines the t...

abstract background: primary cardiac lymphoma is extremely rare. case report: in this care report, we present the case of a 46-year-old man with primary cardiac lymphoma involving left atrium and interatrial septum, presenting as dyspnea palpitation and irregular heart beat. the diagnosis was obtained by transthoracic echocardiography and surgical biopsy with subxiphoid approach which revealed ...

introduction rhodium metal is known for its stability in corrosive environments, physical beauty, and its unique properties. rhodium is now widely used for alloying platinum in thermocouples, crucibles, evaporating dishes, weighing boats windings for high-temperature furnaces. it has been applied as a coating material because of the hardness and luster of its surface. rhodium is present at abou...

aromatase inhibitors have been used as a second line therapy after tamoxifen, in estrogen-receptor positive (er+) women to reduce estrogen concentration in plasma and breast tumors. it has been shown that benzofuran(phenylmethyl)imidazoles are potent aromatase inhibitors at nano-molar concentrations, about 1000 times more potent than aminoglutetimide. in this study, cytotoxic activity of some o...

the genus tanacetum is one of the most important medicinal plant that contains 26 species in iran, 12 of them are endemic. this paper reports the essential oil (eo) composition of tanacetum polycephalum subsp. polycephalum growing wild in iran.  flowers and leaves were collected from different location of azerbaijan province (marand, mianeh and tabriz), hydro-distilled to produce the oils and a...