The gain of sensory inputs into the nervous system can be modulated so that the nature and intensity of afferent input is variable. Sometimes the variability is a function of other sensory inputs or of the state of motor systems that generate behavior. A form of sensory modulation was investigated in the Aplysia feeding system at the level of a radula mechanoafferent neuron (B21) that provides ...

BACKGROUND Polymorphism among class I molecules of the major histocompatibility complex (MHC) confers allotypic specificity on the peptides that these molecules bind and present to cytotoxic T lymphocytes. Evolution of new human HLA class I alleles usually involves gene recombination events that replace a segment of one allele with the homologous region of another. In this study, the impact of ...

We use support theory, in particular the fretsaw extensions of Shklarski and Toledo [ST06a], to design preconditioners for the sti ness matrices of 2-dimensional truss structures that are sti y connected. Provided that all the lengths of the trusses are within constant factors of each other, that the angles at the corners of the triangles are bounded away from 0 and , and that the elastic modul...

Objective: Detector designs for small animal scanners are currently dominated by discrete crystal implementations. However, given the small crystal cross-sections required to obtain very high resolution, discrete designs are typically expensive, have low packing fraction, reduced light collection, and are labor intensive to build. To overcome these limitations we have investigated the feasibili...

‘‘Multiple introns, and the prospect that these occur within several genes in the same metabolic pathway, suggest a regulatory role for splicing . . . ’’ (1). That statement was made more than a decade ago by our colleagues and ourselves in reference to the phage T4 group I introns, all three of which reside in genes involved in nucleotide metabolism. The intervening years were distinguished by...

Human Leukocyte Antigens (HLA) of fetus are responsible for induction of HLA antibodies in mother. Exposure to the mismatched paternal HLA antigens in the fetus gives rise to a polyclonal antibody response against paternal HLA antigens. HLA antibodies are present in the maternal circulation of the placenta and are absorbed onto the placenta [1]. The major source of HLA antisera is from sera of ...

Single component as well as binary component reforming studies were conducted on diesel surrogates (tetradecane, decalin, and 1-methylnaphthalene). H2, CO, and CO2 production was measured as a function of temperature, space velocity, and reforming type for a Pt-based catalyst. Intermediate species formation of various hydrocarbons including olefins and aromatics were observed during reforming. ...