[en] Objective: To investigate the significance of determination of the changes in serum level of CXCL10 in the patients with Graves' disease after radioactive iodine(¹³¹I) therapy. Methods: Level of serum CXCL10 in the patients with Graves disease, the cured patients treated with ¹³¹I and compared to the normal control group. Serum CXCL10 level was measured by ELISA. The relationship among CXCL10, free triiodothyronine(FT₃) and free thyroxine(FT₄), then made an analysis statistically. Results: The level of CXCL10 in patients with Graves' disease expressed significantly higher than that in the normal control(P < 0.05), meanwhile, CXCL10 in the cured patients decreased significantly(P < 0.05); and CXCL10 was positively correlated with FT₃ and FT₄ (P < 0.05). Conclusion: The level of CXCL10 was correlated with function of thyroid, CXCL10 might be a valuable indicant to evaluate the therapeutic efficacy of Graves' disease after ¹³¹I treatment. (authors)

[en] Radioactive radon is an important hazard in indoor air environments. In order to study the concentration of radon in the building environment, this paper tests the content of cockroaches in a university dormitory, teaching building and auxiliary room through experiments. And the experimental results are analyzed. The results show that: In the built environment, the closer the soil is to the foundation, the higher the concentration of radioactive radon, and the effect of temperature and humidity on the concentration of radioactive radon is very small. (paper)

[en] In the present work, the electrochemical behavior and properties of the passive film of a new Sn-alloyed 316LX austenitic stainless steel were investigated. With the increase in Sn content in 316LX austenitic stainless steel from 0 to 0.21%, the critical pitting temperature value increased from 32.6 to 38.8 °C, and the pitting potential increased from 0.252 V_SCE to 0.317 V_SCE. Electrochemical impedance spectroscopy results showed that the corrosion resistance of passive film rose with the increase in Sn content, indicating a more stable passive film. The Mott–Schottky measurement revealed an n-type passive film with a decreased carrier concentration on the 316LX austenitic stainless steel surface. The Cr, Sn²⁺ and Sn⁴⁺ (SnO, SnOHCl or SnO₂) enrichments were observed in the passive layer by X-ray photoelectron spectroscopy. The enrichment of Sn and Cr in the passive film can account for the enhanced pitting resistance of 316LX austenitic stainless steel in chloride solution.

[en] This article, in light of the full design criteria enacted by IAEA, studies the physical preliminary design for small scale pressurized water reactor (SPWR) of 200 MW. A software (HELIOS) was used for designing the geometrical structure of subassembly, modeling the reactor core and calculating the important relational physical values of the subassembly and the reactor core, which was coupled with the preliminary Thermal-hydraulic parameters. The core power distribution was calculated, and the neutron flux density, the mean nuclear density, the macroscopic absorption cross section and the macroscopic fission cross section responded to changes in burn-up. Subassembly is made up by plate-type element instead of stick element, and the geometrical structure of subassembly is square. The rectangular channel between the plate-type element is independent which could ignore the influence of flow bypass. According to the calculating result, the design is up to the full design criteria. (authors)

No abstract available

[en] Hemicelluloses are the major constituent of biomass and their hydrolysis products xylo-oligosaccharides (XOS) are of great importance to the food, chemical and pharmaceutical industries. In this work, catalytic conversion of bamboo hemicelluloses into XOS was developed using novel solid acid catalysts of sulfonated bamboo-based carbon material (BCS). The Fourier Transform Infrared Spectroscopy characterization of BCS confirmed the successful introduction of acid groups (including –SO_3H, –COOH and phenolic –OH) onto its surface. The effects of reaction temperature, residence time and solid acid-to-water ratio on the performance of catalytic conversion were investigated. The maximum XOS yield of 54.7 wt% based on xylan content was obtained at 150 °C for 45 min with a solid acid to water mass ratio of 1:200. The use of water solvent with BCS provides a green and efficient process for hemicellulose conversion. - Highlights: • Sulfonated bamboo-based carbon (BCS) with active groups was synthesized. • Microwave irradiation was adopted to increase the reaction efficiency. • XOS with higher DP was preferentially obtained under mild conditions. • Xylose and XOS with lower DP were preferentially obtained under severe conditions. • Limited byproducts were detected in the hydrolysis reaction

[en] Two kinds of fixed bed ion exchange adsorption tower with different structure of the filter from one uranium deposit in Inner Mongolia were introduced. Through analysis and study the filter structure of the adsorption tower, comparison the two kinds of adsorption tower, back washing the loaded uranium resin and uranium elution etc. running operation effect from the aspect of solution distribution in the tower, the advantage and disadvantage of the two different kinds structure of the adsorption tower were analyzed, and the improving measures were also put forward. The study can provide technical support for the uranium large bases of adsorption tower design in the next step. (authors)

[en] This paper introduces the engineering practice of rapid and harmless treatment of abandoned drilling mud in a immersed uranium mine, and carries out related tests to evaluate the flocculation and solidification effects. Practice and research have shown that the addition of ferrous sulfate facilitation to the waste drilling mud can effectively speed up the solid-liquid separation of the mud. The curing condition can be achieved within 40 days. The flocculated sediment is solidified by adding the cement curing agent, which can greatly shorten the waste mud. Compared with the traditional natural evaporation and landfill disposal method, the curing efficiency is greatly improved, and the abandoned mud pit is reclaimed in the same year. The method also has good economics. At the same time, it does not produce secondary toxic and harmful substances, and some water resources are reused, which is of great significance for protecting the ecological environment. (authors)

[en] Highlights: • A type free-sintering geopolymer membrane for waste water treatment was fabricated. • The geopolymer inorganic membrane held good strength and appropriate water flux. • The mechanism of removing Ni"2"+ combined actions of the adsorption and rejection. • The geopolymer membrane is a promising way to remove heavy metal ions in industry. - Abstract: A type of novel free-sintering and self-supporting inorganic membrane for wastewater treatment was fabricated in this study. This inorganic membrane was synthesised using metakaolin and sodium silicate solutions moulded according to a designed molar ratio (SiO_2/Al_2O_3 = 2.96, Na_2O/Al_2O_3 = 0.8 and H_2O/Na_2O = 19) which formed a homogenous structure and had a relative concentration pore size distribution, via scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) analyses. In this work, the Ni"2"+ removal effect of geopolymer inorganic membrane was studied under different pH value, initial concentration of Ni"2"+ solutions and initial operation temperature. Results showed that geopolymer inorganic membrane efficiently removes Ni"2"+ from wastewater because of the combined actions of the adsorption and rejection of this membrane on Ni"2"+ during membrane separation. Therefore, geopolymer inorganic membrane may have positive potential applications in removing Ni"2"+ or other heavy metal ions from aqueous industrial wastewater.

[en] Objective: To present the CT and MRI findings of the fibrous dysplasia(FD) of the spine. Methods: CT and MRI findings were retrospectively evaluated in 19 cases of FD of spine, all of which were confirmed pathologically. Nineteen patients underwent CT plain scanning(19/19) and 5 had enhanced CT scanning(5/19). Patients were also examined by MRI plain scan(11/11) or MRI enhanced scan (6/11). The location of tumors, the type of bone destruction, the boundary of lesions, internal intensity or signal, the enhancement pattern of lesions, and presence of compression fractures, spinal deformity were observed. Result: Nine cases had monostotic FD, while 10 had polyostotic FD. In all the 49 lesions of 19 cases, 13 lesions were located in the cervical vertebrae, 23 lesions in the thoracic vertebrae, 11 lesions in lumbar vertebrae, and 2 lesions in sacral vertebrae. Thirty-three lesions involved both vertebral body and appendix. Pure osteolysis were found in 26 lesions on CT examinations. Peripheral osteosclerosis rims (41/49) and expansive lesions(32/49) were seen. Residual bone crest(28/49) and ground-glass opacity(23/49) were noted. Different degrees of vertebral compression were found in 19 lesions. Five patients had spinal deformity. On T₁WI, 14 lesions showed intermediate or low signal, and 10 lesions presented as heterogeneous signal. On T₂WI, 6 lesions had low signal intensity, 4 lesions were noted as hyperintensive, and 14 lesions presented as heterogeneous signal. Multiple fluid-fluid levels were found in 1 lesion. Low signal rims were seen in 14 lesions. Twenty lesions of 11 patients had significant enhancement. Conclusion: Expansive pattern, ground-glass opacity, peripheral osteosclerosis rims and significant enhancement were helpful findings for the diagnosis of spinal FD. (authors)