The growing use of wireless communication devices has been significantly increasing the level high frequency electromagnetic fields (EMFs) in environment, which raises a concern for possible deleterious effects on living organisms. Long lasting exposure to low-intensity EMFs can cause molecular and cellular level, number morphological physiological changes. aim this work was investigate 2.41 GH...

Biological time-keeping mechanisms have fascinated researchers since the movement of leaves with a daily rhythm was first described >270 years ago. The circadian clock confers a approximately 24-hour rhythm on a range of processes including leaf movements and the expression of some genes. Molecular mechanisms and components underlying clock function have been described in recent years for sever...

most minerals, occurring in aqueous environments, play a key role in the survival rate of aquatic living organisms. however, life situation of the living organisms would be under attack when the contents of these elements exceed than the specified limit because of various reasons (amini ranjbar, 1994). bioaccumulation of the elements in living organisms and their excess concentration than stand...

Chlorination is one of the best known disinfectant methods for treating drinking water. Mycobacterium aurum and Escherichia coli are common waterborne organisms and as mycobacterial species are much resistant to reactive oxygen species, the initial effect H2O2 and HOCl was quantified in Escherichia coli and Mycobacterium aurum with the concentrations ranging from 0 to 0.16mM.The influence of re...

The fruticose thallus of the lichen Cladina stellaris (Opiz.) Brodo can be subdivided into individual whorls of branches of known age. Photosynthesis declines steadily with age from a maximum rate of 0.76 milligram CO(2) per gram dry weight per hour in 1-year-old whorls to 0.02 milligram CO(2) per gram dry weight per hour after 15 years. Conversely, the dry biomass of the whorls increases up to...

A major problem which arises in work on the chemistry of bacteria is that of obtaining adequate amounts of organisms with the facilities of the ordinary research laboratory. For this purpose, in growing bacteria for chemical studies on Flexner dysentery organisms (Barnes, Dewey, Henry, and Lupfer, in press), a method was developed for obtaining large amounts of this organism rapidly, and in hig...

This research aimed at identifying natural organisms and their properties in the technological samples of contemporary architecture. The main questionswere: "Which properties of natural organisms are effective on the technological works of contemporary architecture?" and "How much do they affect?"This descriptive-analytic research was conducted using archival method to access the theoretical...

objective: the entry of toxoplasma gondii into the bloodstream and other tissues (such as liver, muscle, cardiac muscle, …) of intermediate hosts and its multiplication in nucleated cells may cause changes in plasma levels of various enzymes due to tissue damage. in present study the serum levels of ast, alt, alk/p, cpk, ldh, and acp in rats infected experimentally with toxoplasma gondii have b...

Introduction: Complications of zinc poisoning are analyzed in several studies. Among these, pulmonary fibrosis are reported. There is some doubts about chronic complications of zinc inhalation. Precise screening programs in zinc mine workers need previous knowledge of relative frequency of chronic complications due to zinc inhalation. So this study is held to recognize the complications and to ...