Davis, Lowell E., A. Roger Hohimer, and Mark J. Morton. Myocardial blood flow and coronary reserve in chronically anemic fetal lambs. Am. J. Physiol. 277 (Regulatory Integrative Comp. Physiol. 46): R306–R313, 1999.— Chronic fetal anemia produces large compensatory increases in coronary blood flow in the near-term fetal lamb. To determine if increased coronary flow in anemic fetuses is associate...

—The recent discovery of herbivores that feed on Ni-hyperaccumulating plants and contain elevated Ni concentrations in their bodies suggests that Ni may be transferred to their predators. We tested this hypothesis using the high-Ni herbivore Melanotrichus boydi and four predator species: the spiders Pholcus phalangioides and Misumena vatia, the mantid Stagmomantis californica and the lacewing C...

Thornburg, Kent L., and Mark D. Reller. Coronary flow regulation in the fetal sheep. Am. J. Physiol. 277 (Regulatory Integrative Comp. Physiol. 46): R1249–R1260, 1999.—The two ventricles of the fetal sheep heart have anatomic and biochemical differences that account for their differing functional capabilities and blood flows. Coronary flows to both ventricles have been measured using radiolabel...

Klassen, Christopher L., Jay H. Traverse, and Robert J. Bache. Nitroglycerin dilates coronary collateral vessels during exercise after blockade of endogenous NO production. Am. J. Physiol. 276 (Heart Circ. Physiol. 45): H918–H923, 1999.—In a previous study nitroglycerin failed to dilate coronary collateral vessels during exercise. This study tested the hypothesis that failure of nitroglycerin t...

Four enteropathogenic Escherichia coli (EPEC) strains belonging to the O55 serogroup (G21 and G30 [both O55:H6], G35 [O55:H-], and G58 [O55:H7]) were tested for their tissue tropism by using human intestinal in vitro organ culture. Strains showed restricted adhesion with attaching-and-effacing activity to follicle-associated epithelium of Peyer's patches, with no apparent adhesion to duodenum o...

The P50 of whole blood [30 ̊C, PCO∑=2.08kPa (15.6mmHg)] decreases during embryonic development from approximately 6.7kPa (50mmHg) at 15 days to about half this value at hatching (86 days), paralleling a decrease in ATP from 100 to 5–10 mmol g21 Hb. There is also a progressive changeover from embryonic to adult haemoglobin (HbA). A pulse of 2,3-diphosphoglycerate (2,3-DPG) (18 mmol g21 Hb) occurs...

Cosmogenic 3He and 10Be ages measured on surface boulders from the moraine sequence deposited by the northern outlet glacier of the Yellowstone ice cap indicate that the outlet glacier reached its terminal position at 16.5 6 0.4 3He ka and 16.2 6 0.3 10Be ka, respectively. Concordance of these ages supports the scaled production rates used for 3He (118.6 6 6.6 atoms · g21 · yr21) and 10Be (5.1 ...

A sensitive and precise method for the determination of trace amounts of total sulfur in organic mixtures is described. With this method bonded sulfur is reacted with activated Raney nickel and is reduced to nickel sulfide at 70 °C. Then, the residue is separated on a filter paper and pyrolysed by induction furnace technique for generation of SO2 which is then detected by a non-dispersive gas d...