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Practicable, definition

The above considerations indicate the complex nature of the hydrocarbons known as caryophyllene. For practical purposes, however, the compounds indicated are obtained of practically definite melting-points, and, in spite of the complicated isomerism existing amongst most of them, are useful for identification of the sesquiterpene or mixture of sesquiterpenes, occurring naturally and known as caryophyllene . [Pg.88]

This equation is a useful practical formula for converting tables of pH based on the Sorensen scale to an approximate activity basis, in line with the practical definition of pH given below. [Pg.568]

Menorrhagia Menstrual blood loss of greater than 80 mL per cycle a more practical definition is heavy menstrual flow associated with problems of containment of flow, unpredictably heavy flow days, or other associated symptoms. [Pg.1570]

Schmidt The liver is sort of an example, and the practical answer to the question of why it is useful to know is because sometimes we want to reconstitute livers. When you do a two-thirds partial hepatectomy all the cells divide. Suppose you push this to a limit and take out 90% of a liver, the hope is that there is something called a liver stem cell which is at something called GO, which is capable of reconstituting 90% as opposed to 67%. Is this a practical definition of GO ... [Pg.42]

To do any extraction, you ll need two liquids, or solutions. They must be insoluble in each other. Insoluble here has a practical definition ... [Pg.113]

For concentrated solutions, the activity coefficient of an electrolyte is conveniently defined as though it were a nonelectrolyte. This is a practical definition for the description of phase equilibria involving electrolytes. This new activity coefficient f. can be related to the mean ionic activity coefficient by equating expressions for the liquid-phase fugacity written in terms of each of the activity coefficients. For any 1-1 electrolyte, the relation is ... [Pg.723]

As with solids, colloids, and solutes, marine scientists have developed practical definitions of salinity that are based on measurement technique. Those in current use are listed in Table 3.2 with their typical measurement precision. Each method has its advantages and disadvantages. For example, refractometers are small, lightweight, and low cost, but have low precision, so they are used for field work in which only a rough... [Pg.45]

It has been estimated that at least 30% of patients with major depression fail to respond to a 6-week course of a TCA antidepressant. A major problem arises however in the definition of "treatment resistance". To date, there appears to be no internationally acceptable definition of the condition. A practical definition which many clinicians find useful is that treatment resistance occurs when the patient fails to respond to ... [Pg.190]

The particular experimental studies, which have been described here, have provided a basis for a practical definition of the boundary of the mobile phase in coals, and some tentative clues to the nature of its association with the network. Inevitably, other research techniques will bring different perspectives. [Pg.87]

Experimentally, FRET interactions are observed and quantified by measuring the donor or acceptor emission signals. The most common and practical definition of FRET efficiency is... [Pg.289]

The size of an atom is not a simple concept. An inspection of the wave function for any atom shows that it is asymptotic to infinity, so some practical definition of size is required. There are two ways of assigning sizes to atoms atomic radius and covalent radius. [Pg.11]

Pure water containing no dissolved gases possesses equal concentrations of hydronium and hydroxide ions, so that pH = pOH = 7.0 at 298.15 K. This is defined as a neutral solution This allows a practical definition of acidic and basic behaviour. Any substance dissolved in water which produces a pH below 7 is termed an acid and any substance dissolved in water which produces a pH greater than 7 is called a base. [Pg.53]

This definition is very much in line with the more practical definition described by Eurachem/CITAC [3]. Their procedure for traceability consists of the following steps [3] ... [Pg.749]

This is a very useful, practical definition of Km Km is equivalent to the substrate concentration at which V0 is one-half Fmax. [Pg.205]

The type of adhesion dealt with in the examples in the second paragraph above and Fig. 1 is mechanical or structural while for the lithographic resist adhesion requirements described in this paper a more practical definition of adhesion, one first proposed by Mittal [16], is being referenced and used. Resist patterning layer-substrate adhesion is required only to process or pattern a particular device layer. After the circuit layer is patterned, the resist layer is removed and does not become an integral part of the circuit, as opposed to a PI interlevel metal dielectric layer which does. As such, it is not required to possess high mechanical adhesion strength. In fact, the resist layer must be quantitatively removed after the circuit required layer has been patterned. If the resist layer adheres too well and becomes difficult to remove, it actually interferes with successful circuit fabrication. [Pg.442]

What is accomplished by adhesion promotion treatments in IC manufacturing should actually be referred to as wafer substrate preparation, and not adhesion. Adhesion in the structural sense, as experienced in airplane composite material parts attachment, is not accomplished by silane wafer processing treatments except for the PI applications discussed early in this paper. The term adhesion, as it is used here, refers to a more practical definition—that is, resist image adhesion. Nevertheless, this type of adhesion is essential to the huge international semiconductor business, and the early silane work of Plueddemann and others was essential to early wafer adhesion process development. [Pg.459]

This is not the official definition, which is a practical definition based on the measured potentials of some exactly defined electrochemical cells in which the hydrogen ion activity is calculated by an extended Debye-Huckel theory. [Pg.319]

The local ground-state correlation potential is defined in RDFT as the functional derivative of Eq.(7) with respect to p. When infinitesimal variation of occupation numbers is allowed, a more practical definition follows from the fact that the unsymmetrical energy formuala used to construct Eq.(7) is itself a Landau functional of the occupation numbers [19]. Correlation energies of Landau quasiparticles, expressed as diagonal elements of a one-electron Hamiltonian matrix, are defined by differentiating with respect to occupation numbers to give... [Pg.77]

No rigorous practical definition of acid strength exists outside of very dilute aqueous solutions where activity coefficients can be assumed to be unity. Each method of measuring the acid strength of surface sites is liable to give somewhat different answers, the results being qualitative at best. The dielectric constant of the medium, in which the acid or base probe is used influences the measured acid-base strength. [Pg.540]

Reddy Karri, S. B., and Knowlton, T. M. A practical definition of the fast fluidization regime, in Circulating Fluidized Bed Technology III (P. Basu, M. Horio and M. Hasatani, eds.), pp. 67-72. Pergamon Press, 1991. [Pg.144]

Table 40 lists the most frequently reported chemical features of Mannich bases employed as surfactants, along with brief indications of their individual function, although this aspect is hardly specifiable, as several different practical definitions can be given for the same molecule. For example, an antioxidant for lubricating oil may be also named an antisludge compound, due to its capability to reduce the formation of solid precipitate caused by oxidation processes. [Pg.271]


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See also in sourсe #XX -- [ Pg.8 ]




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