Stomach, intestinal, and colonic transit were measured in males with insulin-requiring diabetes of greater than 10 years' duration to compare with symptoms and to estimate the medical significance. For all diabetics only the symptom constipation correlated with the appropriate regional delayed transit. Diabetics with delayed transit in any region, however, had more overall gastrointestinal symptoms. Diabetics with delayed transit had disease of significantly longer duration than those without delay. Delayed transit was common in the diabetics selected for study with 21 of 54 stomachs, 10 of 20 small intestines, and 14 of 20 colons showing impairment. Of 35 diabetics with impaired transit at one or more locations, only seven were judged of medical importance and five of these responded to treatment. In this study, delayed transit was frequent; in the one fifth requiring management, the symptoms related closely to the region impaired.

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Specific heat ratio (γ), pseudo-Grüneisen parameter (Γ ), heat capacity (C p ) and effective Debye temperature (θ D ) for binary system of tetrahydrofuran with o-cresol and methanol respectively, were calculated using the experimentally measured densities, velocities and viscosities of the pure liquids and their mixtures over the whole composition range and at T = 293, 303, 313 K. The excess pseudo-Grüneisen parameter (Γ E ), excess molar isentropic compressibility (K E s ) and excess acoustic impedance (Z E ) were also calculated. The excess deviation functions have been correlated using Redlich-Kister polynomial equation. The observed values of the excess parameters plotted against the mole fraction of tetrahydrofuran have been explained on the basis of intermolecular interaction suggesting strong interaction in tetrahydrofuran + o-cresol than in tetrahydrofuran + methanol. Partial molar isentropic compressibility at infinite dilution and their excess values were calculated for each component. Sanchez theory, Goldsach-Sarvas volume fraction statistics, Sudgen's relation, Flory-Patterson-Rastogi and Brock and Bird model were used with the Aurebach relation to compute theoretically the values of ultrasonic velocities at varying temperatures. The velocity deviations were estimated in terms of average percentage deviations. Internal pressure for both the systems were calculated theoretically and discussed on the basis of relative applicability of the models in theoretical estimations. The isothermal compressibility (k T ), for these binary mixtures were theoretically evaluated by using the Flory statistical theory and five hard sphere models and compared with the experimental values.

The refractive indices, densities and ultrasonic velocities of binary liquid mixtures of tetrahydrofuran (THF) with methanol and o-cresol over the entire composition range have been measured at 293, 303 and 313 K. Refractive index, density and ultrasonic velocity data have been used to evaluate the molar refraction deviation ∆R m , deviation in ultrasonic velocity ∆u, excess internal pressure π These results suggest that specific strong interactions are taking place in THF + o-cresol mixture while dispersive forces seem to be responsible for behaviour of THF + methanol mixture. Further, experimental refractive index and density data of these mixtures were also used to test the validity of the empirical/semi-empirical relations and models for refractive index and density, respectively.