Working in France in 1903, Augustin Cabanès and Lucien Nass declared, “De toutes les armes que le génie de l’homme a inventées pour nuire à son semblable, le poison est la plus lâche; l’empoisonneur est le plus méprisable des criminels” (1). Although these authors were trying to describe the opinion […]
In 2006, approximately 1,399,790 new cases of cancer were diagnosed (1). Current treatments and lifestyle changes have signiﬁcantly improved the fate of these patients; the death rate from the most common cancers—prostrate, breast, lung, and colorectal—and other cancer types is decreasing (1). While the outcome for cancer patients has improved, […]
In November, two teams of scientists published methods of generating embryonic-like stem cells without destroying an embryo, a finding which could quell the ethical controversy surrounding stem cell research. The two independent research teams, headed by James Thomson of the University of Wisconsin-Madison and Shinya Yamanaka of Kyoto University in […]
Within one second of the detonation, a 20 pounds per square inch (psi) overpressure will be generated out to a distance of 0.4 miles from the Empire State Building. Everything in this circle is utterly demolished. Those within this circle will be exposed to sudden pressure effects that destroys lungs and ear drums, shrapnel from nearby objects, and a thermal emission of such intensity that immediate death results.
Fluorescent imaging depends on the physical principles behind the scattering of light. In a typical ﬂuorescent microscope, a laser, usually of argon, shines through a sample at a wavelength of 488 nm. The sample, in turn, ﬂuoresces according to how it was stained. Certain cells, and often even speciﬁc cellular structures, can be resolved, which results in a ﬂuorescent image that is reﬂected into an optical lens or screen for visual analysis.