[en] Objective: To study the influence of hyperbaric oxygen on hypothyroidism after mi therapy. Methods: Fourty-two patients with early hypothyroidism after ¹³¹I therapy were randomly divided into two groups the hbo group (n=21) and the non-hbo group (n=21). Serum T₃, T₄4 and TSH levels were measured twice (four months apart) with CLIA in both groups. Results: Serum T₃ and T₄ levels were increased significantly in both groups after the four months course of low-dosage thyroid hormone replacement but there were no significantly differences between the final levels in the two groups (P>0.05). TSH levels were lowered significantly in both groups (both P<0.05), however, the magnitude of lowering was significantly larger in the hbo group than that in the non - hbo group (P<0.05). Conclusion: Hyperbaric oxygen therapy might be a potential useful means for treatment of early hypothyroidism after administration of ¹³¹I. (authors)

[en] Acrylic acid (AA) and sodium methallyl sulfonate (SMS) have been grafted onto Poly (ethylene-co-tetrafluoroethylene) (ETFE) films by pre-irradiation, and a humidity sensing film including strong acid (-SO3Na) and weak acid (-COOH) groups has been prepared. The structure and surface morphology of both grafted and ungrafted ETFE films were observed by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM), respectively. a resistive humidity sensor was prepared based on the humidity sensing film and its electrical response to humidity was examined. The films showed high sensitivity with nearly three orders of magnitude change in the resistance during the relative humidity variation from 5% to 98%. The film exhibits small hysteresis (less than 2% RH) and quick response (absorption: less than 2 min; desorption: less than 4 min). The effect of grafting yield on humidity sensing properties was discussed. (authors)

[en] The clinical application of ¹⁸FDG-PET imaging on lung cancer are introduced as well as its advantages and weaknesses are evaluated in detail. It supposes that the PET technique will be more important in diagnosis, staging, evaluation of therapeutic effect and prognosis of lung cancer

[en] EGF is labelled with ¹²⁵I or ¹³¹I, the labelling yield is 75.4% and the radiochemical purity is >95%. The animal experiments indicate that ¹²⁵I-EGF distribute mainly in liver, the kidney and spleen, and clear by kidney; the concentration of brain is lower than that of blood. It is described with a biexponential model, T_1/2α and T_1/2β are 0.3 and 80.8 min respectively. Their stability is very good

[en] Tungsten oxide (WO₃) is a suitable material for gas sensing applications relying on the change of conductivity by adsorped molecules. Regular arrays of nanotubes provide a large surface area and promise very high sensitivity. This work presents the production of such nanotube arrays with the potential of tuning the surface area by sol-gel-deposition of WO₃ in porous alumina membranes (PAM) from the precursors tungsten hexachloride (WCl₆) and acetylacetone (C₅H₈O₂). Dimensions and composition of the nanotubes are characterized by SEM and EDX, their sensing properties for CO and NO₂ will be investigated.

[en] Some analytic technique can play important role for identifying the provenance and age of ceramic ware. However, it is usually not allowed to destructive analyze for a valuable intact porcelain ware. These analysis methods such as X-ray Fluorescence (XRF), Proton Induced X-ray Emission (PIXE), and Synchrotron Radiation X-ray Fluorescence (SRXRF) are suitable for nondestructive analysis of ancient ceramic wares. In order to compare the analytic data obtained by different measuring method and identify the provenance and age accurately, the effective way is to calibrate elemental concentration in body and glaze of ceramic ware. Microanalysis reference material (MRM) of ancient ceramic has to be prepared for achieving quantitative analysis. A solid powder 99% in size of 500 mesh for microanalysis reference material (MRM) has being prepared in institute of high energy physics. The minimum analytic masses of 1 mg were determined by Neutron Activation Analysis (NAA) for these elements (Sc, Cr, Co, Rb: Cs, La, Ce, Nd, Sm, Tb, Yb, Lu; Hf, Ta, Th, U), and by SRXRF for elements (K, Ca, Ti, Mn, Fe, Zn; Rb, Sr).

[en] Objective: To investigate the biological properties of ¹¹⁷Sn^m-triethylenetetraamine-hexa-methylene phosphonic acid (TTHMP), a new kind of bone seeking compound and to explore a potential radiopharmaceutical for target therapy of bone metastases. Methods: With the contrast of ¹¹⁷Sn^m-DTPA, the plane bone scanning on New Zealand rabbits and the biodistribution experiments on Kunming mice were performed. Results: 1) The plane bone scanning of rabbits showed that ¹¹⁷Sn^m-TTHMP was principally absorbed by skeletal system. The skull, spine and legs can be observed clearly, which was similar with the images of ¹¹⁷Sn^m-DTPA in clarity. 2) Mice experiments showed the high bone seeking of ¹¹⁷Sn^m-TTHMP. The skeletal uptakes were 15.82, 18.89 and 25.23% ID/g, respectively at 1, 4, 24 h after the injection and kept on 15.39% ID/g 14 d later. Kidney seemed to be the major excretory organ of it. The blood clearance was quick and the retention in non-target organs was low. 3) The percentage of bone uptake of ¹¹⁷Sn^m-TTHMP was higher than that of ¹¹⁷Sn^m-DTPA, and the statistical difference was significant. Conclusion: ¹¹⁷Sn^m-TTHMP shows fine biological properties which can be compared favorably with the commonly used bone radioactive agent, and it is well worth further research as a promising potential radiopharmaceutical in nuclide treatment for bone metastases

[en] Objective: To study the possible mechanism of the influence of hyperbaric oxygenation on thyroid function in mice. Methods: Fifteen mice were exposed to hyperbaric oxygen at 0.2MPa 60min daily for 10 days. Another 15 mice were exposed to hyperbaric oxygen at 0.25MPa for the same period. The mice were sacrificed afterwards and serum T₃, T₄, TSH levels determined with CLIA. Results: In both 0.2MPa group and 0.25MPa group the serum T₃ and T₄ levels were significantly higher than those in controls (15 mice) (P<0.01), but levels in the two groups were not significantly different from each other (P>0.05). The serum TSH concentrations changed little after hyperbaric oxygen exposure (P>0.05). Conclusion: HBO (0.2MPa or 0.25MPa) could enhance the thyroid secretion of T₃ and T₄, with little effect on the level of serum TSH. (authors)

[en] Neutron activation analysis (NAA), in combination with multivariate analysis of the generated data, was used for the provenance study of the Terracotta Army of Qin Shihuang, the first Emperor of the first unified country of China. Using NAA, we measured the chemical composition of 30 shreds of the Terracotta Army and 29 clay samples from six resources in Lintong around Qin Shihuang Mausoleum. Although quite a few elements were determined, 8 elements were used for grouping the shreds and raw clay samples. By the statistical methods, some of clay samples close to the mausoleum present a chemical composition similar to that of the Terracotta Army, which hints these the raw clay resources were likely applied for the production of the Terracotta Army of Qin Shihuang

[en] Objective: To investigate the biological properties of ¹⁵³Sm-N-(2-hydroxyethyl) ethylene diamine-1, 1, 2-tri (methylene phosphonic acid, HEDTMP), a new kind of bone seeking compound; and to see if this radiopharmaceutical could be explored for target therapy of bone metastases. Methods: With ⁹⁹Tc^m-methylene diphosphonate (MDP) and ¹⁵³Sm-ethylene diamine tetramethylene phosphonic acid (EDTMP) being used as control agents, respectively, the plane bone scanning on New Zealand rabbits and Wistar rats and the biodistribution experiment of ¹⁵³Sm-HEDTMP on Kunming mice were performed. Results: 1) The plane bone scanning on rabbits and rats showed that ¹⁵³Sm-HEDTMP was principally absorbed by skeletal system. Skull, spine and leg bones could be observed as clearly as the images by ⁹⁹Tc^m-MDP and ¹⁵³Sm-EDTMP. 2) Mice trial also indicated the high bone seeking of ¹⁵³Sm-HEDTMP. The skeletal uptake was 19.13, 24.54 and 18.95% ID/g at 30 min, 3 and 24 h, respectively, after the injection. Kidney seemed to be the major excretory organ. The clearance from blood was quick and the retaining amount in non-target organs was small. 3) The bone uptake and target to non-target ratio of ¹⁵³Sm-HEDTMP were higher than that of ¹⁵³Sm-EDTMP. Conclusion: ¹⁵³Sm-HEDTMP showed its fine biological properties which could be compared favorably with the commonly used bone radioactive agents, and it is well worth further research as a promising potential radiopharmaceutical in nuclide treatment for bone metastases