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Klein derivation

Muller and Klein [27] have compared the predictive capabilities of model 11.5.3 with selected, linear Csw versus Kow regression models such as model 11.4.9. Known models of the latter type have usually been derived from mixed Kow data (i.e., Kov/ is either estimated, experimental, or an average of several values, depending on what information is available for a compound). Muller and Klein derived a model for liquid compounds with unambiguous input ... [Pg.128]

In the foregoing treatments of pressure feedback, the simulation volume retains its cubic form, so changes consist of uniform contractions and expansions. The method is readily extended to the case of a simulation region in which the lengths and directions of the edges are allowed to vary independently. Parrinello and Rahman [31] and Nose and Klein [32] extended the Andersen method to the case of noncubic simulation cells and derived a new Lagrangian for the extended system. Though their equations of motion are... [Pg.61]

Above 2 K, the temperature dependence of the zero-field resistivity of the microbundle measured by Langer et al. [9] was found to be governed by the temperature dependence of the carrier densities and well described by the simple two-band (STB) model derived by Klein [23] for electrons, , and hole, p, densities in semimetallic graphite ... [Pg.115]

In going from the Schrodinger equation to the Klein-Gordon equation, we obtain the neeessary symmetry between spaee and time by having seeond-order derivatives throughout. It is usually written in a form that brings out its relativistic invarianee by using what is ealled/our-vector notation. We define a four-vector X to have components... [Pg.306]

The Schrodinger equation and the Klein-Gordon equation both involve second order partial derivatives, and to recover such an equation from the Dirac equation we can operate on equation 18.12 with the operator... [Pg.306]

Although the Klein-Gordon equation is of second order in the time derivative, for a positive energy particle the knowledge of at some given time is sufficient to determine the subsequent evolution of the particle since 8ldt is then given by Eq. (9-85). Alternatively Eq. (9-85) can be adopted as the equation of motion for a free spin zero particle of mass m. We shall do so here. [Pg.499]

Klein E, Uhde TW, Post RM Preliminary evidence for the utility of carbamazepine in alprazolam withdrawal. Am J Psychiatry 143 235—236, 1986 Kouyanou K, Pither CE, Wessely S Medication misuse, abuse and dependence in chronic pain patients. J Psychosom Res 43 497-304, 1997 Kryspin-Exner K [Misuse of bezodiazepine derivatives in alcoholics] (German). Br J Addict Alcohol Other Drugs 61 283-290, 1966 Kryspin-Exner K, Demel 1 The use of tranquilizers in the treatment of mixed drug abuse. Int J Clin Pharmacol Biopharm 12 13-18, 1973... [Pg.155]

Iron complexes with the pentadentate ligand 3 derived from pyridyl and prolinol building blocks containing a stereogenic center were reported from the group of Klein Gebbink (Scheme 4) [34]. In alkene oxidations with hydrogen peroxide,... [Pg.85]

Aghi M, Cohen KS, Klein RJ, Scadden DT, Chiocca EA (2006) Tumor stromal-derived factor-1 recruits vascular progenitors to mitotic neovasculature, where microenvironment influences their differentiated phenotypes. Cancer Res 66 9054-9064... [Pg.266]

Mineral Oil Hydraulic Fluids. The mechanism whereby mineral oil hydraulic fluids may enter the blood from the lungs, skin or gastrointestinal tract is not known. In general, mineral oils and other petroleum-derived materials are expected to be absorbed only to a limited extent by the lungs, skin, and the gastrointestinal tract (IARC 1984 Klein and Simon 1986), but data monitoring mineral oil hydraulic fluid components in the blood of animals or humans after exposure were not located. [Pg.180]

Mineral Oil Hydraulic Fluids. No specific methods were located for interfering with the mechanism of action for toxic effects produced by mineral oil hydraulic fluids. Unstable alveoli and distal airways have been proposed as major factors in the respiratory symptoms that occur after the ingestion of other petroleum-derived materials. Continuous positive airway pressure or continuous negative chest wall pressure, as well as the application of supplemental oxygen, have been recommended to counteract the resultant pneumonitis (Eade et al. 1974 Klein and Simon 1986). [Pg.232]

Lambert MP, Barlow AK, Chromy BA, Edwards C, Freed R, Liosatos M, Morgan TE, Rozovsky I, Trommer B, Viola KL, Wals P, Zhang C, Finch CE, Krafft GA, Klein WL. Diffusible, nonfibrillar ligands derived from Abetad 42) are potent central nervous system neurotoxins. Proc Natl Acad Sci USA 1998 95 6448-6453. [Pg.280]

Although the majority of attention in discussions on the origins of BIFs has been on the oxide facies, siderite facies rocks are equally important in many BIF sequences. Reaction of Fe(II)aq and dissolved carbonate with hematite to form siderite and magnetite has been hypothesized to be an important diagenetic process in marine basins during formation of some BIFs if sulfate contents were low (e.g., Klein and Beukes 1989 Beukes et al. 1990 Kaufman 1996 Sumner 1997). In Figure 18 we assume that Fe(II)aq was derived either from MOR sources or DIR, or a combination of the two, which reacted with ferric oxide precipitates to form magnetite or dissolved carbonate to produce siderite. [Pg.396]

All of the tissues affected in Klein-Waardenburg syndrome are derived from embryonic tissue in which PAX-3 is expressed. Symptoms include ... [Pg.75]

Because Darnell and Mol neglected the width of the flight and allowed the dynamic coefficient of frictions to be set equal for part of the derivation, the model is rarely used. The model adaptation of Tadmor and Klein is used instead. This model will be described next. [Pg.137]

Little new work on analgesically active morphinan derivatives has appeared recently. Gates and Klein [56] have shown that a shift in the ethanamine bridge terminus of the morphinans from C-13 to C-14, giving metamorphinans (IX),... [Pg.236]

When R is hydrogen, more tautomeric forms similar to those of monometalated acetonitriles can be written . These modes appear at too low wavenumbers to be acetylenic or nitrile absorptions and therefore they were attributed to ketenimine derivatives of form R(Li)C=C=NLi. For the ionic species, Gornowicz and West proposed a delocalized structure (Scheme 8) °. Klein and Brenner called it sesquiazacetylene in a previous study . [Pg.257]

D. J. Klein, N. H. March, and A. K. Theophilou, Form of spinless first- and second-order density matrices in atoms and molecules, derived from eigenfunctions of and S. J. Math. Chem. 21,261 (1997). [Pg.58]

Several groups have reported reactions giving thiazoloquinazoline compounds, probably the most interesting of which is the cyclization-ring expansion of the aziridine thiourea derivative 225 to the dihydro-thiazolo[2,3-6]quinazoline 226 in hydrochloric acid of Howard and Klein.395 Other preparations of this ring system involve the treatment of l-(2-carbethoxyphenyl)-2-thioureas with a-chloro 396-398 or a-bromo396,397 ketones or with vicinal dibromides.398 Tetrahydro salt... [Pg.155]

Solubility-Partition Coefficient Relationships A critical review on the applicability of empirically derived solubility -Kow models has been given by Yalkowsky et al. [24], Isnard and Lambert [26], Lyman [1], and Muller and Klein [27]. Equations 10.4.3 to 10.4.5 are examples of solubility-Kow models. Isnard and Lambert developed a model based on 300 structurally diverse compounds. The model equation for liquids (Tm < 25°C) is... [Pg.125]

The potential curves derived from such calculations can often be empirically improved by comparison with so-called experimental curves derived from observed spectroscopic data, using Rydberg-Klein-Rees (RKR) or other inversion procedures. It is often found, particularly for the atmospheric systems, that the remaining correlation errors in a configuration interaction (Cl) calculation are similar for many excited electronic states of the same symmetry or principal molecular-orbital description. Thus it is often possible to calibrate an entire family of calculated excited-state potential curves to near-spectroscopic accuracy. Such a procedure has been applied to the systems described here. [Pg.228]


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See also in sourсe #XX -- [ Pg.162 ]




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