Acceptable hypothesis

If in the section defects are absent, the projections is distributed accidentally on pixels and the values of functions p(ij) aproximately are alike in all pixels of the section. In defective areas the projections are focused and, as far as defect appearance is unlikely on accepted hypothesis... 

In the last decade, the refrigerant issue is extensively discussed due to the accepted hypothesis that the chlorine and bromine atoms from halocarbons released to the environment were using up ozone in the stratosphere, depleting it specially above the polar regions. Montreal Protocol and later agreements ban use of certain CFCs and halon compounds. It seems that all CFCs and most of the HCFCs will be out of produc tion by the time this text will be pubhshed. 

The essential feature of the AAA is a comparison of active and inactive molecules. A commonly accepted hypothesis to explain the lack of activity of inactive molecules that possess the pharmacophoric conformation is that their molecular volume, when presenting the pharmacophore, exceeds the receptor excluded volume. This additional volume apparently is filled by the receptor and is unavailable for ligand binding this volume is termed the receptor essential volume [3]. Following this approach, the density maps for each of the inactive compounds (in their pharm conformations superimposed with that of active compounds) were constructed the difference between the combined inactive compound density maps and the receptor excluded volume represents the receptor essential volume. These receptor-mapping techniques supplied detailed topographical data that allowed a steric model of the D[ receptor site to be proposed. 

Esr spectroscopy has been used extensively in connection with the problem of radical stabilization. Two properties of the radicals are analysed to obtain information on their stability spin-density distribution and lifetime. The former has a solid physical basis in hyperfine splitting and the universally accepted hypothesis that spin delocalization accords stability to a free radical (for a discussion, see Walton, 1984). The more the unpaired spin density is delocalized, the higher is, supposedly, the stability of the radical. This argument, as we shall see, is mainly used on a qualitative basis (see. 

With the plant interview information, verification of the data, and the completion of the simple calculations, an experienced troubleshooter will develop a set of hypotheses for the root cause of the defect. After the hypotheses are established, a series of experiments need to be developed that accept or reject the hypotheses. Once a hypothesis is accepted via experimentation, then the next step is to develop a technical solution to remove the defect. Often more than one technical solution Is possible. The best technical solution will depend on the cost and time to implement the solution, machine owner acceptance, and the risk associated with the modified process. An accepted hypothesis must drive the technical solution. If a hypothesis is not accepted prior to developing a technical solution, then the troubleshooter may be working on the wrong problem and the defect may not be eliminated from the process. 

The theory of solvent effects on the electronic structure of a given solnte leads to a representation of the subsystem embedded in a larger one with the help of effective Hamiltonians, wave functions, and eigenvalues. Since the whole electronic system is quantum mechanical in nature, and in principle nonseparable, the theory for the ground electronic state permits defining under which conditions the solnte and solvent separability is an acceptable hypothesis. It is possible to distinguish passive from... 

The increasingly accepted hypothesis that acetaldehyde may be the causative agent in initiating the multitude of acute pharmacological and chronic pathophysiological effects of alcohol prompted Nagasawa et al. to seek methods to reduce its blood levels. One possibility would be the administration of (S)-penicillamine (4), a compound related to cysteine. The condensation of this amino acid with acetaldehyde produced 2,5,5-trimethylthiazolidine-4-carboxylic acid 242). The chirality of this compound was deducted by NMR analysis to be 72% 2S, 4S and 28% 2R, 4S. Thus, this result is consistent with the configuration found previously for the thiazolidines formed from (R)-cysteine and aldehydes 241 ... 

Boyle easily confirmed the widely accepted hypothesis that it was the weight of the atmosphere that held up the column of mercury in the Torricellian barometer. This theory dated from an experiment by Blaise Pascal, who had sent his brother-in-law to carry a mercury barometer up a mountain to observe what happened. Indeed, the mercury stood at a lower level in the tube when measured on top of the mountain than it did at the... 

A commonly accepted hypothesis utilized in explaining this tendency toward detonation in solid proplnts is the grain deflagration or surface combustion mechanism. Processes which enhance internal surface formation such as internal gas evolution and creep induced strains can be expected also to increase the tendency toward deflagration to detonation transition (DDT). The DDT phenomenon in solid proplnts was examined in some detail in Encycl Vol 4. It is believed that the build-up of internal pressures... 

Arsenic is transported with the fluvial sediments from the Himalayas (e.g. (McArthur et al., 2004)). This is the most widely accepted hypothesis at present. 

Fundamentally, all the modification methods follow the same principle, that is, to remove structural aluminum. After the removal, a structural defect site is usually created. A widely accepted hypothesis is that this structural defect site is a hydroxyl nest (1. It has been further hypothesized that under the proper conditions, a silica molecule would be inserted into the vacant site and, thus, anneal the structural defect (16). 

The hypothetical nitrilase catalytic mechanism based on previous schemes (for a review see [6]), which has been recently refined to bring more understanding to the formation of two possible end-products [39], is discussed in Chapter 16. According to a generally accepted hypothesis, the catalytic mechanism involves a nucleophilic attack on the cyano carbon by the sulfhydryl group of the conserved... 

The most widely accepted hypothesis of migraine suggests that a migraine attack is precipitated when painsensing nerve cells in the brain (called nociceptors) release chemicals called neuropeptides. At least one of the neurotransmitters, substance P, increases the pain sensitivity of other nearby nociceptors. 

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