HOCKEY

Akermark, C., Jacobs, I., Rasmusson, M., and Karlsson, J., 1996. Diet and muscle glycogen concentration in relation to physical performance in Swedish elite ice hockey players. International Journal of Sport Nutrition 6 272-284. 

Mixed-solvent solutions of various cosolvent-water proportions are titrated and psKa (the apparent pKa) is measured in each mixture. The aqueous pKa is deduced by extrapolation of the psKa values to zero cosolvent. This technique was first used by Mizutani in 1925 [181-183]. Many examples may be cited of pKa estimated by extrapolation in mixtures of methanol [119,161,162,191,192,196,200], ethanol [184,188-190,193], propanol [209], DMSO [212,215], dimethylformamide [222], acetone [221], and dioxane [216]. Plots of psKa versus weight percent organic solvent, Rw = 0 — 60 wt%, at times show either a hockey-stick or a bow shape [119]. For Rw > 60 wt%, S-shaped curves are sometimes observed. (Generally, psKa values from titrations with Rw > 60 wt% are not suitable for extrapolation to zero cosolvent because KC1 and other ion pairing interferes significantly in the reduced dielectric medium [223].)... 

Apart from the parent compound 1 and its very simple alkyl derivatives, 1,3,4-oxadiazoles are solids. Solid oxadiazoles containing biphenyl or triphenyl substituents exhibit interesting properties upon heating. The symmetric 2,5-bisbiphenyl-4-yl-l,3,4-oxadiazole 38 melts into an isotropic phase showing small monotropic mesophase. By contrast, the asymmetric (hockey stick-shaped) mesogen 2-terphenyl-4-yl-5-phenyl-l,3,4-oxadiazole 39 exhibits a more stable enantiotropic liquid crystalline phase (a smectic phase as well as a nematic phase) <2001PCB8845>. 

During the past millennium the average global temperature was essentially flat until about 1900, then spiked upward, like the upturned blade of a hockey stick. Some view this as a clear indication that humans are warming the globe, but others hold that the climate is undergoing a natural fluctuation not unlike those in past eras. 

Appell, David, "Behind the Hockey Stick." Scientific American, Volume 292, pp 34-35, March 2005. 

Hockey sticks that normally sell for 89.00 are on sale for 3 5 % off the regular price. There is also a 6% sales tax. How much will the stick cost after the sale and the sales tax ... 

The secret to stopping a bullet with a fairly soft fabric is that it behaves in much the same way as the netting on the goal frame used in hockey. When a hockey puck strikes a net at 100 km/h, its kinetic energy is transferred to the lengths of twine of the goal net. This twine is an interlaced mesh that has strands which stretch horizontally and vertically to disperse the energy of impact over a wide area. 

Protective devices for various sports such as hockey, basketball, soccer, boxing. . Padding of helmets and seats for babies and children. .. 

When high-school cross-country runners were exposed for 1 h to photochemical oxidants at 0.03-0.3 ppm, their performance decreased with increasing concentration. A statistical test for threshold values (regression using/ hockey stick functions) applied to these data gives a threshold estimate of 0.12 ppm, with a 95% confidence interval of 0.067-0.163 ppm. ... 

There are obvious inadequacies in the established values. First, it was assumed that the oxidant standard is a surrogate standard for photochemical oxidants, with ozone as the indicator. However, it is clear that very low concentrations of specific irritants, such as peroxyacetyl-nitrate (PAN), are sufficient to cause eye irritation. Second, some of the statistical techniques used to determine the lowest concentration at which effects are observed were inconsistent and undocumented. A hockey stick fimction was sometimes used to find an effect threshold. 

Hasselblad, V., G. Lowrimore, W. C. Nelson, J. Creason, and C. J. Nelson. Regression Using Hockey Stick Functions. Durham. N.C. U.S. Department of Health. Education, and Welfare. Public Health Service. Environmental Health Service, National Air Pollution Control Administration (in-house report, 1970). 5 pp. 

Most team games (e.g. soccer, rugby, hockey, football) and some individual sports (e.g. squash, tennis) involve intermittent high-intensity bursts of exercise interspersed with rest periods (i.e. mostly less intense periods), although the whole period of activity can be very long. These are known as multiple sprint sports. In experiments that involved a study of short bursts of activity followed by short rest periods, repeated for 30 minutes, the increase in blood... 

Hedberg K et al An outbreak of nitrogen dioxide-induced respiratory illness among ice hockey players. JAMA 262 3014—3017, 1989... 

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