although the conventional therapies have obviously improved the conditions of patients with cancer, some mechanisms of resistance have led scientists to use alternative agents that can penetrate in most solid tumors. furthermore, the success of cancer therapies depends on limiting the uptake of toxins to normal tissues and their selectivity to malignant cells. the involvement of natural and gen...

introduction: addiction is a habit or behavior that is often hard to quit. it is estimated that 190 million persons are substance users around the world. substance abuse creates tolerance after a while. shortly after taking the drug, a person will not enjoy as the beginning of its use that is why the amount of substance used is gradually increased. the purpose of this study was to find the reas...

nanotechnology has slowly but steadily revolutionized the diagnosis, imaging and treatment of cancer. detecting cancer at earliest stages, locating the tumor at different areas in the body and specific delivery of the drugs to malignant cells including surgically inaccessible tumors are the core areas of medical and pharmaceutical research across the world. in this endeavour, nanodevices have e...