Composite hypothesis

At the heart of the interpretation of the spectra is the postulate that sharper multiplet features associated with chemically equilvalent carbon atoms in the cellulose spectra are expressions of magnetically inequivalent sites within the unit cells. If this "fine structure" were due to some other cause, then the conclusion of multiple crystalline forms would be called into serious question. The fact that the ratios of multiplet intensities for given resonances, such as that of C4 or Cl, vary from sample to sample and rarely have ratios of small whole numbers, reinforces the crystalline composite hypothesis. 

In this report we present experimental evidence derived from these four approaches. In the end, the hypothesis that unit cell inequivalence alone causes the observed multiplicity for chemically equivalent carbons is supported. Therefore, the crystalline composite hypothesis, although slightly revised, is strongly supported, particularly for the algal celluloses. 

Although, this composite hypothesis, like the other three hypotheses, lacks experimental support it appears to encompass more of the facts and ahnormalities in vitiliginous patients. 

Chakraborty DP, Roy S, Chakraborty AK, Rakshit R, Chakraborty A (1988) Profile of Stress Conditions During Induced Depigmentation Tryptophan Participation in Melanogenesis and Composite Hypothesis of Vitiligo. IRCS Med Sci 16 21... 

Composite Hypothesis n A hypothesis that partially but not completely describes the distribution of the outcomes of a random experiment. For example, if the hypothesis states only the mean and not the variance of the normal distribution that describes the distribution. If the hypothesis completely describes the distribution, it is referred to as a simple hypothesis. 

The current calculation methods are based on the hypothesis that each mixture whose properties are sought can be characterized by a set of pure components and petroleum fractions of a narrow boiling point range and by a composition expressed in mass fractions. 

Classical laminated plate tlieoiy is used to determine the stiffness of laminated composites. Details of the Kitchoff-Love hypothesis on which the theory is based can be found in standard texts (1,7,51). Essentially, the strains in each ply of the laminate ate represented as middle surface strains plus... 

Hydronium ion, 187 concentration calculation, 192 concentration and pH, 190 model, 186 Hydroquinone, 345 Hydrosphere, 437 composition, 439 Hydroxide ion, 106, 180 Hydroxides of lhird row, 371 Hydroxylamine, 251 Hydroxyl group, 329 Hypobromiie ion, 422 Hypochlorite ion, 361 Hypochlorous acid, structure, 359 Hypophosphorous acid, 372 Hypothesis, Avogadro s, 25, 52... 

Prout s hypothesis that the atoms of all elements were composites of hydrogen. Further, Mendeleev was particularly fond of emphasizing that smooth curves should not be drawn through the points representing numerical data on the elements, since such curves would imply continuity instead of strict individuality. 

All these results are consistent with the hypothesis that aryl cations react in aqueous media at diffusion-controlled rates with all nucleophiles that are available in the immediate neighbourhood of the diazonium ion. On this basis Romsted and coworkers (Chaudhuri et al., 1993a, 1993b) used dediazoniation reactions as probes of the interfacial composition of association colloids. These authors determined product yields from dediazoniation of two arenediazonium tetrafluoroborates containing ft-hexadecyl residues (8.15 and 8.16) and the corresponding diazonium salts with methyl groups instead of Ci6H33 chains. ... 

Debates over the validity of the Gaia hypothesis have focused on two very different issues. One concerns the degree to which the composition of the atmosphere and, hence, Earth s... 

Figure 4.10. At the top the raw data for dry residue for 63 successive batches is shown in a standard control chart format. The fact that as of batch 34 (arrow ) a different composition was manufactured can barely be discerned, see the horizontals that indicate the means DRi 33 resp. DR34 g3- A hypothesis that a change occurred as of batch 37 would find support, though. Cusum charts for base period 1. .. 63 resp. base period 1. .. 37 make the change fairly obvious, but the causative event cannot be pinpointed without further information. Starting with batch 55 (second arrow ), production switched back to the old composition.

Meanwhile, Crutzen had done experiments showing that ozone in the upper atmosphere can be destroyed easily by reactions with nitrogen oxides. This work demonstrated that the ozone layer is in a delicate balance that could be disturbed significantly by changes in atmospheric composition. In 1974, Molina and Rowland combined Crutzen s experimental work with their own theoretical analysis and published a prediction (hypothesis) that CFCs pose a serious threat to the ozone layer. 

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