Background Melatonin (N-acetyl-5- methoxytryptamine) is mainly synthesized and secreted in the pineal gland, ovary, testes, bone marrow, retina and lens in mammalian species. It is involved in the detoxification of ROS and protects embryos from oxidative damage. Melatonin acts as a potential free radical scavenger, including peroxyl radical and hydroxyl radical. In addition, it can stimulate th...

evaluating patient safety culture in personnel of academic hospitals in urmia university of medical sciences in 2011     baghaei r [1] , nourani d [2] * , khalkhali hr [3] , pirnejad h [4]     received: 10 oct , 2011 accepted: 2 jan , 2012   abstract   background & aims : healthcare organizations in iran are striving to improve patient safety and quality of care through implementation of safety...

The worldwide use of precast concrete frames leads to an increase in the need for the investigation of efficient precast connections, particularly in the seismic regions. The current paper provides a numerical and experimental study on a dry precast connection. Experiments were conducted to validate the finite element method in the laboratory of the University of Science and Culture. To verify ...

The relationship between tracheary element differentiation, cell proliferation and growth hormones was examined in agar-grown soybean callus. The time course of cell division and tracheary element formation in tissues grown on a medium containing 5 x 10(-7)m kinetin and 10(-5)m NAA was determined by means of maceration technique. After a slight lag period, a logarithmic increase in cell number ...

A special form of a CuZn-superoxide dismutase with a high isoelectric point (hipI-SOD; EC 1.15.1.1) and hydrogen peroxide (H2O2) production were studied during the secondary cell wall formation of the inducible tracheary element cell-culture system of Zinnia elegans L. Confocal microscopy after labelling with 2',7'-dichlorofluorescin diacetate showed H2O2 to be located largely in the secondary ...

The stability of elements of three different dispersed repeated gene families in the genome of Drosophila tissue culture cells has been examined. Different amounts of sequences homologous to elements of 412, copia and 297 dispersed repeated gene families are found in the genomes of D. melanogaster embryonic and tissue culture cells. In general the amount of these sequences is increased in the c...