The ability of the spotted fever agent, Rickettsia rickettsii, to grow not only in the cytoplasm but also in the nucleus of infected cells was first noted by Wolbach (12) in epithelial cells of the gut, hypoderm and salivary gland of infected ticks; it has subsequently been established for all spotted fever group rickettsiae investigated, especially when they were maintained on mammalian tissue...

Between the initial excitation of nucleons by the passing throughout each other and the final cascading of newly created hadrons there should be considered one more step. We call it the second step cascading process. It acts as an interaction of wounded nucleon from one nucleus with another nucleon from the same nucleus. This mechanism leads to the significant increase on the inelasticity for n...

To study intracellular pathways by which the human papillomavirus 16 oncogene E7 participates in carcinogenesis, we expressed an inducible chimera of E7 by fusion to the hormone-binding domain of the estrogen receptor. The chimeric protein (E7ER) transformed rodent fibroblast cell lines and induced DNA synthesis on addition of estradiol. In coimmunoprecipitation experiments, E7ER preferentially...

Esophageal foreign body impaction may be fatal secondary to occlusion of the glottis or external compression membranous portion trachea. A 14-year-old adolescent female was admitted emergency department for evaluation sudden dyspnea and cyanosis after she swallowed a food bolus (a part bachelor radish kimchi) without chewing. Unfortunately, patient died despite cardiopulmonary resuscitation. Au...

classification of occlusion is the first step in diagnosing the relationship between the upper and lower jaw's teeth. based on angle's classification, occlusion is divided into three categories: class i, class ii, and class iii. the aim of this study was to determine the prevalence of occlusion categories, based on angle's classification, in adolescents with permanent dentition in tehran. this ...