3,628,151 A * 12/1971 Roeder ...................... 324/76.14 3,787,857 A * 1/1974 Lazarchik et al . ............ 342/351 4,292,638 A * 9/1981 Lazarchik et al . .............. 342/88 4,568,200 A * 2/1986 Hatono et al . ................ 374/122 4,627,442 A * 12/1986 Land ............................. 600/549 6,133,869 A * 10/2000 McGill ......................... 342/351 2003/0020498 At* 1/2003 K...

Until recently, African trypanosomes of the species Trypanosoma (T . ) brucei which are the causative agents of sleeping sickness in man and Nagana disease in cattle, were believed to multiply solely by binary fission. In the early eighties, evidence for a system of genetic exchange was obtained indirectly from the analysis of enzyme electrophoretic variation between stocks isolated from natura...

Se llevó a cabo un estudio cuantitativo con diseño transeccional descriptivo el objetivo de analizar las competencias didácticas virtuales del modelo T-PACK (Shulman, 1986; Koehler y Mishra, 2009), que mayormente fueron desarrolladas por los docentes (N=87, Edad: M=33.91, DE=7.699, Max=51, Min=20) la Universidad Autónoma Tamaulipas cursaron Diplomado en Ambientes Virtuales Aprendizaje 2014 al 2...

We have examined the properties and intracellular localization of acetylcholine receptors in the C2 muscle cell line and in a variant (T-) that accumulates AChR intracellularly. On immunoblots, the subunit structures of the AChR from wild-type and Tcells were similar except that the 3' and t5 subunits of the variant AChR had altered mobilities. Digestion with endoglycosidases H and F demonstrat...

Epidemiological studies have not identified causal factors for Alzheimer’s disease as seen in a number of reviews [Heyman et al., 1984; Mortimer and Hutton, 1985; Rocca et al., 1986; Schoenberg, 1986; Broe et al., 1990; Beard et al., 1992; Breteler et al., 1992; White, 1992; Disterhoft et al., 1994; Katzman and Kawas, 1994; Prince et al., 1994; Keefover, 1996; van Duijn, 1996]. However, recentl...

The original proposal of Berridge (1983), that inositol 1,4,5trisphosphate [Ins( 1,4,5)P,] is the second messenger linking receptor-activated phosphoinositide turnover with intracellular Ca2+ mobilization, has been well supported by many experiments (Streb et al., 1983; Berridge & Irvine, 1984; Berridge, 1987). However, more recent evidence has suggested that this proposal may need some qualifi...

1Lucchitta B. K. and Watkins J. A. (1978) LPS 9, 3459-3472. 2Solomon S. C. and Head J. W. (1979) JGR 84, 1667-1682. 3Solomon S. C. and Head J. W. (1980) Rev. Geophys. & Space Phys. 18, 107-141. 4Hiesinger H. et al. (2003) JGR 108, E001985. 5Watters T. R. and Johnson C. L. (2010) in Planetary Tectonics, Cambridge Univ. Press, 121-182. 6Watters T.R. et al. (2012) Nature Geosci., doi:10.1038/ngeo1...

Hummingbirds have received considerable attention in studies of feeding and energy regulation because of their small size, frequent feeding, and their use of energy-rich sugar solutions (e.g. Diamond et al. 1986, Ewald and Carpenter 1978, Hainsworth 1981). They store nectar in a crop, and this internal reservoir supplies energy between foraging bouts (Hainsworth and Wolf 1972, Karasov et al. 19...

An unexpected increase of phototrophic and heterotrophic picoand nanoplankton under anoxic conditions was encountered in the central Baltic Sea below 120 m depth in August 1991 and 135 m depth in July 1992, respectively. Cell abundances in anoxic layers were up to 10 times higher for chroococcoid cyanobacteria, 6 to 8 times for phototrophic nanoflagellates and 3 to 4 times for bacteria, as comp...