BACKGROUND Treponema pallidum ssp. pallidum (TPA), the causative agent of syphilis, is a highly clonal bacterium showing minimal genetic variability in the genome sequence of individual strains. Nevertheless, genetically characterized syphilis strains can be clearly divided into two groups, Nichols-like strains and SS14-like strains. TPA Nichols and SS14 strains were completely sequenced in 199...

The tprK gene in Treponema pallidum undergoes antigenic variation. In all T. pallidum isolates examined to date, except the Nichols type strain, heterogeneous tprK sequences have been identified. This heterogeneity is localized to seven variable (V) regions, and tprK sequence diversity accumulates with serial passage in naïve rabbits. The T. pallidum Nichols genome described a single tprK seque...

shorter wave-lengths of the point where a temperature increase had very little effect (actually a small decrease in absorption, as would be expected) Ribaud found that the absorption began again to increase with temperature. This evidently is the continuous absorption due to the higher vibrational states. For photochemical reactions the important consequence is that in such molecules one must e...

Patients with severe nonthyroidal illness (NTI) often have decreased serum thyroxin (T4) concentrations and sometimes have decreased free T4 (FT4) and increased tumor necrosis factor-alpha (TNF-alpha) concentrations. We evaluated four commercial methods for measuring FT4 [Abbott IMx, Amersham Amerlex MAB, Nichols, and Diagnostic Products Corporation (DPC) RIA] and one method for TNF-alpha in 41...

In the rabbit model of syphilis, infection phenotypes associated with the Nichols and Chicago strains of Treponema pallidum (T. pallidum), though similar, are not identical. Between these strains, significant differences are found in expression of, and antibody responses to some candidate virulence factors, suggesting the existence of functional genetic differences between isolates. The Chicago...

Nichols algebras naturally appear in the classification of finite dimensional pointed Hopf algebras. Assuming only that the base field has characteristic zero several new finite dimensional rank 2 Nichols algebras of diagonal type are listed. Each of them is described in terms of generators and relations. A Poincaré–Birkhoff–Witt basis of all of these Nichols algebras is given and their dimensi...

Due to the increase in electricity consumption world, tendency resource diversity generation section has increased. With decrease reserves of petroleum and derivative products used traditional energy production systems, turned renewable sources. Examples sources are sun, wind turbines, fuel cells. In order provide sustainable blades body must be protected. this study, blade pitch angle control ...

A technique is developed to reduce the investigation of Nichols algebras of integrable Uq(g)-modules to the investigation of Nichols algebras of braided vector spaces with diagonal braiding. The results are applied to obtain information on the Gelfan’dKirillov dimension of these Nichols algebras and their defining relations if the braiding is of a special type and q is not a root of unity. For ...