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A number of bacterial strains have been isolated and investigated in our search for a promising organism in the production of single-cell protein from methanol. Strain L3 among these isolates was identified as an obligate methylotroph which grew only on methanol and formaldehyde as the sole sources of carbon and energy. The organism also grew well in batch(More)
A low-power fully integrated ultra-wideband (UWB) wavelet generator is presented. This UWB generator is intended for low-power and low-complexity UWB radio technology using the noncoherent energy collection approach. The wavelet generator is based on a cross-coupled inductance-capacitance (LC) oscillator. It can be directly driven by two digital signals,(More)
efficiency opportunities in data centers H. F. Hamann T. G. van Kessel M. Iyengar J.-Y. Chung W. Hirt M. A. Schappert A. Claassen J. M. Cook W. Min Y. Amemiya V. López J. A. Lacey M. O’Boyle The combination of rapidly increasing energy use of data centers (DCs), which is triggered by dramatic increases in IT (information technology) demands, and increases(More)
The species swine provides the only example for CD2+ and CD2- subsets of Ig-CD4-CD8- lymphocytes with the propensity for homing to lymphoid tissue (Saalmüller et al., Eur. J. Immunol. 1989. 19: 2011). That the CD2-CD4-CD8- lymphocytes are bare of marker molecules that typify T lymphocytes raised the question of whether or not this cell type is descended(More)
To estimate the functional maturity of the phagocytic defence in neonatal calves, we analyzed the characteristics of blood phagocytes from calves (n = 10) 1 h post partum (p.p.) and 4 h p.p. At 1 h p.p., all calves were colostrum-deprived, while 5 calves had received colostrum before the 4 h p.p. sampling. The results were compared to those obtained from(More)
The lipopolysaccharides (LPS) of the obligate acidophile Thiobacillus ferroxidans grown on iron, sulfur, and glucose as energy sources were examined for various physical and chemical properties. Both qualitative and quantitative variation were found among the three preparations. The LPS extracted from iron-grown cells (Fe-LPS) contained less than 3% protein(More)
Previous work has revealed striking differences in the peripheral T-lymphocyte compartments of swine compared to other species. The key difference is the existence of four T-lymphocyte subpopulations defined by their CD4/CD8 expression. Besides this difference in the CD4/CD8 antigen expression, we report here another unusual antigen distribution on porcine(More)
Caspases (cysteine aspartate-specific proteases) are a structurally related group of cysteine proteases that cleave peptide bonds following specific recognition sequences. They play a central role in activating apoptosis of vertebrate cells. To measure apoptosis induced by various stimuli and at an early apoptotic stage, caspases are an ideal target. This(More)
Three types of T cell receptors (TcR) gamma/delta were identified in swine, all of which are disulfide-bonded cell surface heterodimers. The first, a 38/40-kDa molecule, is related to the TcR gamma/delta of sheep and cattle, and defines in swine a subset of CD4-CD8- T lymphocytes that is enriched in the circulating T lymphocyte pool. The other two receptors(More)
The immune system of swine is unique in that the expression of CD4 and CD8 antigens defines four subpopulations of resting extrathymic T lymphocytes. Beyond phenotypic differences to other species, porcine T lymphocytes, particularly when derived from infected animals, are known to show high non-specific cytolytic in vitro activity. Here we describe the(More)