We present the results of a high statistics lattice study of the gluon propagator, in the Landau gauge, at β = 6.0. As suggested by previous studies, we find that, in momentum space, the propagator is well described by the expression G(k 2) = M 2 + Z · k 2 (k 2 /Λ 2) η −1. By comparing G(k 2) on different volumes, we obtain a precise determination of the exponent η = 0.532(12), and verify that ...

Although many components of the genetic pathways that provide positional information during embryogenesis have been identified, it remains unclear how these signals are integrated to specify discrete tissue territories. Here, we investigate the molecular mechanisms underlying the formation of one of the hindbrain segments, rhombomere (r) 3, specified by the expression of the gene krox20. Dissec...

Mononuclear leukocytes are able to destroy tumor cells under a variety of circumstances. In few such instances is the biochemical basis of cytotoxicity understood. Recently, we demonstra ted that activated macrophages, s t imulated by phorbol myristate acetate (PMA), 1 secreted substantial amounts o f hydrogen peroxide (1). The release o f this oxidant from macrophages correlated with the extra...

Human embryonic stem cells (hESCs) are routinely cultured on fibroblast feeder layers or in fibroblast-conditioned medium (CM). Bone morphogenetic proteins (BMPs) have previously been shown to induce hESC differentiation, in apparent contrast to mouse embryonic stem (ES) cells, in which BMP4 synergizes with leukemia inhibitory factor (LIF) to maintain self-renewal. Here we demonstrate that hESC...

Hematological profiles of cyclists fluctuates are based on the volume/frequency/intensity of training. The present study examined the effects of training load on the cyclist’s biochemical profile which may be associated with over training. Twelve male cyclists volunteered to participate in this study. The participants completed a systematic training program which was divided into four phases i....