I Hertz

Hopenhayn-Rich, C., K.D. Johnson, and I. Hertz-Picciotto. 1998. Reproductive and developmental effects associated with chronic arsenic exposure. SEGH 3rd Inter. Conf. Arsenic Expos. Health Effects 21. 

Hertz L, Schousboe I, Hertz L, Schousboe A (1984) Receptor expression in primary cultures of neurons or astrocytes. Prog. Neuropsychopharmacol. Biol. Psychiatry 8 521-527. 

A.H. Smith, C. Hopenhayn-Rich, M.N. Bates, H.M. Goeden, I. Hertz-Picciotto, and H.M. Duggan, Cancer risks from arsenic in drinking water. Environ. Health Perspect. 97 259, 1992. 

AH Smith, C Hopenhayn-Rich, MN Bates, HM Goeden, I Hertz-Picciotto, HM Duggan, R Wood, MJ Kosnett, MT Smith. Cancer risks from arsenic in drinking water. Environ Health Perspect 97 259-267, 1992. 

Boqa-Aburto, V.H., I. Hertz-Picciotto, M. Rojas Lopez, P. Farias, C. Rios, and J. Blanco. 1999. Blood lead levels measured prospectively and risk of spontaneous abortion. Am. J. Epidemiol. 150(6) 590-597. 

I. Hertz-Picciotto, P.G. Green, L. Delwiche, Blood mercury concentrations in CHARGE study children with and without autism. Environ. Health Perspect. 118 (1) (2010) 161-166. 

D.O. Taylor, L.B. Edwards, P. Aurora, J.D. Christie, F. Dobbels, R. Kirk, A.O. Rahmel, A.Y. Kucheryavaya, M.I. Hertz, Registry of the International Society for Heart and Lung Transplantation twenty-fifth official adult heart transplant report—2008, J. Heart Lung... 

The classical theory of contact mechanics, due to Hertz, treats the bodies in contact with a hard wall repulsive interaction, i.e. there is no attractive interaction whatsoever, and a steep repulsion comes into play when the surfaces of the bodies are in contact. The Hertzian theory assumes that only normal stresses exist, i.e. the shear stress in the contact region is zero. Under these conditions, the contact radius a), central displacement (3) and the distribution of normal stress (a) are given by the following expressions ... 

Motion of fluids in which local velocities and pressures fluctuate irregularly, in a random manner. Predictive maintenance technique that uses principles similar to those of vibration analysis to monitor the noise generated by plant machinery or systems to determine their actual operating condition. Ultrasonics is used to monitor the higher frequencies (i.e., ultrasound) that range between 20,000 Hertz and 100 kiloHertz. 

Unlike vibration monitoring, ultrasonics monitors the higher frequencies, i.e. ultrasound, produced by unique dynamics in process systems or machines. The normal monitoring range for vibration analysis is from less than 1 Hertz to 20,000 Hertz. Ultrasonics techniques monitor the frequency range between 20,000 and 100 kHz. 

To determine the impact of resolution, calculate the display capabilities of your system. For example, a vibration signature with a maximum frequency (Fmax) of 1000 Hertz taken with an instrument capable of 400 lines of resolution would result in a display in which each displayed line will be equal to 2.5 Hertz or 150 rpm. Any frequencies that fall between 2.5 and 5.0, i.e. the next displayed line, would be lost. 

Narrowband designed to monitor high-speed components, i.e. above 1000 Hertz, should have an absolute fault of 3.0 g s-peak (acceleration). 

Including capillary condensation with the Hertz approximation, as considered by Fogden and White [20], introduces pressure outside the contact area i.e., adhesion enters the problem nonenergetically through the tensile normal stress exerted by the condensate in an annulus around the contact circle. The resulting equations cannot be solved analytically however, their asymptotic analysis may be summarized as follows. 

Hertz-Picciotto I, Croft J. 1993. Review of the relation between blood lead and blood pressure. Epidemiol Rev 15 352-373. 

EPR spectrometers use radiation in the giga-hertz range (GHz is 109 Hz), and the most common type of spectrometer operates with radiation in the X-band of micro-waves (i.e., a frequency of circa 9-10 GHz). For a resonance frequency of 9.500 GHz (9500 MHz), and a g-value of 2.00232, the resonance field is 0.338987 tesla. The value ge = 2.00232 is a theoretical one calculated for a free unpaired electron in vacuo. Although this esoteric entity may perhaps not strike us as being of high (bio) chemical relevance, it is in fact the reference system of EPR spectroscopy, and thus of comparable importance as the chemical-shift position of the II line of tetra-methylsilane in NMR spectroscopy, or the reduction potential of the normal hydrogen electrode in electrochemistry. 

Hertz, L. and Schousboe, A. (1987) Primary cultures of GABAergic, and glutamatergic neurons as model systems to study neurotransmitter functions. I. Differentiated cells, in Model Systems of Development and Aging of the Nervous System (Vemadakis, A., Privat, A., Lauder, J. M., Timiras, P. S and Giacobini, E eds.), M. Nijhoff Publishing Company, Boston, MA, pp. 19-31. 

Figure 12.3 Regions of the electromagnetic spectrum in terms of both frequency (hertz) and wavelength (m). The visible region is a very narrow band between 400 and 700 nm. The lower labels show which part of the atom the various radiations correspond to, i.e., X-rays result from reorganization of the inner shell electrons, UV from the valence electrons, etc. From PSSC PHYSICS, second edition, copyright 1965 by D. C. Heath and Company. Used by permission of Houghton Mifflin Company.

The distance J between the peaks of a multiplet, measured in hertz is called coupling constant. The separation of peaks in a triplet is exactly the same as that observed in a doublet. From this a conclusion has been derived that the spin-spin coupling is a reciprocal affair, i.e., the effect of a kind of proton on b proton is exactly the same as the effect of V proton on a type of protons as in 1, 1, 2 trichloropropane (Fig. 15.12). In general it can be said that the coupling constants are measures of efficiency of spin-spin, coupling. 

Hertz-Picciotto I, Hu SW (1995) Contribution of cadmium in cigarettes to lung cancer An evaluation of risk assessment methodologies. Lung Cancer 12 116-116 Hickman JC (2000) Tetrachloroethylene. In Kirk-Othmer Encyclopedia of Chemical Technology. Available at http //www.mrw.interscience.wrley.com/emrw/9780471238966/kirk/article/ tetrhick.aO 1 /current/pdf... 

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