Internal bond relationships

Results. Physical property values for the panels produced are given in Table III. A more rapid curing rate with the Desmodur FU-1520A 20 is strongly indicated by the modulus of rupture and internal bond relationships as illustrated by Figures 1+ and 5, respectively. In both instances it appears that the phenolic resin has not totally cured at 8.7 minutes press time and perhaps not at ill.5- The isocyanate, on the other hand, has developed essentially full MOR and IB values at 5 8 minutes. The IB in... 

Schmidbaur, H., Graf W. and Muller, G. (1988) Weak Intramolecular Bonding Relationships The Conformation-Determining Attractive Interaction between Gold(I) Centers. Angewandte Chemie International Edition, 27,... 

Of course one cannot neglect the possibility that the keto group may arise, not from a bond between lignin and carbohydrate but from the hydrolysis of internal bonds in the lignin 21) y and we intend to pursue this point in later studies. However, since there seems to be a relationship... 

Figure 3. Relationship between board density and internal bond strength in particle board made by direct oxidative wood-to-wood bonding. Key , 0.2% FeSO.-4.0% HJD.-0.5% H.PO.-0.5% HCl and O, 0.2% FeSO -4.0% H202-1.0% H PO (77).

A relationship has been established between bond stretching wavenumbers and internal bonding for vanadates in aqueous solution.The Raman spectrum of the myosin Sl-MyADP-vanadate complex shows vanadate bands at 870, 844 and 829 cm - consistent with an approximately planar unit. Raman... 

Lemus, R. H. Skibo, E. B. Design of pyritnido[4.5-s quinazoline-based anthraquinone mimics, structure-activity relationship for quinone methide formation and the influence of internal hydrogen bonds on quinone methide fate. J. Org. Chem. 1992, 57, 5649-5660. 

The relationships between bond length, stretching force constant, and bond dissociation energy are made clear by the potential energy curve for a diatomic molecule, the plot of the change in the internal energy AU of the molecule A2 as the internuclear separation is increased until the molecule dissociates into two A atoms ... 

It was conclusively shown that deoxychlordiazepoxide (393) had none of the phototoxic properties of the parent drug, at least in the rat [225]. Chlordiazepoxide, demethylchlordiazepoxide, demoxepam and diazepam-4-oxide were all phototoxic to a bacterial cell preparation. There was a close relationship between the phototoxicities of the A-oxides and the toxicity in the dark of their oxaziridines. The reduced forms of the four compounds were not phototoxic [ 228 ]. Kinetic studies demonstrated that the oxaziridine (390) covalently bonds to plasma proteins. The half-life of the oxaziridine in the presence of high concentrations of protein was about 30 min. It therefore has time not only to bind to biomolecules in the skin surface, but also to attack internal organs. This was put forward as the explanation of previously observed kidney and liver damage in the rat [229]. 

Fig. la-d Schematic representation of the relationship between neutral, internally charge-assisted and externally charge-assisted hydrogen bonds... 

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