The aim of this study was to evaluate the half-time gastric emptying reproducibility measured by magnetogastrography (MGG). Seven healthy subjects were subjected to a magnetic pulse of 32 mT for 17 ms, seven times in 90 min. The procedure was repeated one and two weeks later. Assessments of the gastric emptying were carried out for each one of the measurements and statistical analyses of ANOVA and Bland-Altman were performed for every group of data. A mean of 21.7 ± 3.3 min was measured for the halftime of gastric emptying for yoghurt. Reproducibility estimation was above 85%. Therefore, magnetogastrography seems to be a reliable technique to be implemented in routine clinical trials.
The solid solution MO, + MeO, (M = Zr, Hf, Ce, T h ; Me = Ca, Sr, Sc, Y, the lanthanides) is considered. A model describing the defect structure of a crystal with consideration of short-range order in the arrangement of defects is proposed. The defect interaction is expressed in the pairwise approximation. The short-range order is characterized by the mean probability of finding a dopant cation in the site nearest to the oxygen vacancy. This probability is calculated using the minimum free energy condition. On the basis of the proposed model expressions are derived for the chemical potentials of components and for the ionic conductivity of the system as a function of composition. The calculated curves are in good agreement with the experimental ones. PaCCMOTpeH TBepnbIB MO, + MeO, (M = Zr, Hf, Ce, T h ; Me = Ca, Sr, SC, Y, JlaHTaHOHnbI). npe&TIOXeHa M O H e n b , Il03BOJrHIorrlaH OIlHCaTb He4eHTHyIO CTpYIETYPy paCTBOp KpmTanna npti yseTe 6 n~m~e r o rIopsxEm B pacnonomeHmm ne$emoB. B3aHMOp&iCTBHe rrocneaHmx ~~~E I C~I B~~T C I I B napHoM n p~6 n~w e~r n~; 6nHm~11B nopxno~ xapamepa-3YeTCR CpeHHefi BepORTHOCTbIo HaXO?KneHHFI IIpkiMeCHOrO KaTHOHa B y3m, 6JIHlrradIIIeM K BaKaHCHEl HElCJIOpO~a. 3Ta BepOHTHOCTb paCCsllTaHa 113 YCJIOBHR MHHHMYMa cBO6OHHOfi 3HeprHM. Ha OCHOBe Ilpej&TIOmeHHOB MOHenkl IlOJIy4eHbI BbIpameHElR HJIH XHM119eCIiIIX nOTeHUHaJIOB KOMIlOHeHTOB, a TaHlKe QJIH ElOHHOfi npOBOnHMOCT11 CEl CTeMbI B 3aB11CMMOCT11 OT COCTBBB. PaCueTHbIe Hp11BbIe COrJlaCyIoTCR C 3HCnepHMeIITaJlbIIbIMH.
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