in this study the effect of the alkylating agent, sulfur mustard, on calf thymus chromatin was investigated using uv/vis spectroscopy, gel electrophoresis and thermal denaturation techniques. the results show that treatment of isolated chromatin with sulfur mustard releases histones from the core particles but does not affect histone h i and nonhistone chromosomal proteins. the content of relea...

The online infomediary, playing an important role in e-commerce, provides more unbiased and refined product information than usual advertisement provided by online retailers. Interestingly, depending on its capability, the quality of product information is likely to differ. Also, given the fact that it enables consumers to grasp market price dispersion of products, the context of online infomed...

I develop and test the theoretical predictions that when investor overreaction to marketwide news is larger, firm valuations in the cross section become more dispersed and stocks earn lower expected returns. Consistent with these predictions, measures of cross-sectional dispersion of firm valuations are negatively related to subsequent market and portfolio excess returns, especially for sets of...

The difference between the maximum and minimum QT interval measured from a 12-lead electrocardiogram was defined as an index of spatial inhomogeneous repolarization of the ventricular myocardium. The causal relationship between QT dispersion and incidence of ventricular arrhythmias has been pointed out in various heart diseases, but until now it was discussed mainly related to sinus rhythm. QT ...

A method based on a statistical approach of estimating uncertainty in simulating the transport and dispersion of atmospheric pollutants is developed using observations and modeling results from a tracer experiment in the complex terrain of the southwestern USA. The method takes into account the compensating nature of the error components by representing all terms, except dispersion error and va...

AIMS This study was designed to test the hypothesis that acute psychological stress is capable of inducing an increase in the dispersion of repolarization in patients with underlying coronary artery disease. METHODS AND RESULTS Twenty four patients undergoing elective coronary angiography were studied, 17 with significant coronary artery disease and seven with normal coronary arteries. Follow...

DNA fragmentation and the nuclear protein matrix in boar spermatozoa were simultaneously assessed using a specific variant of the sperm chromatin dispersion (SCD) test that allows direct visualization of DNA and nuclear proteins under standard conditions of chemical lysis. Nuclear proteins remaining after lysis were stained with the fluorochrome 2,7-dibrom-4-hydroxy-mercury-fluorescein for spec...

BACKGROUND/AIMS A large proportion of men with normal sperm results as analyzed using conventional techniques have fragmented DNA in their spermatozoa. We performed a prospective study to examine the incidence of DNA fragmentation in sperm in cases of couples with previously unexplained infertility and treated with intrauterine insemination. We evaluated whether there was any predictive value o...

The integrity of sperm deoxyribose nucleic acid (DNA) is one of the determinants that ensure normal fertilization, implantation, pregnancy, and the generation of a healthy progeny. Assessment of sperm DNA fragmentation has gained importance as a tool to provide significant information regarding sperm quality, and it can independently predict sperm fertilizing potential. The sperm chromatin disp...

We revisit sidewise dispersion relations as a method to relate the nu-cleon off-shell form factor to observable quantities, namely the meson-nucleon scattering phase shifts. It is shown how for meson-nucleon scattering a re-definition of the intermediate fields leaves the scattering amplitude invariant, but changes the behavior of the off-shell form factor as expressed through dispersion relati...