[en] In order to understand questions about the study on cold fusion in these years, we have studied physical basis of cold fusion. Results show that even though the cold fusion is feasible theoretically in the view of physics, but its reaction ratio is too small to be detected, so that it has no prospect for practical usage at present. However, in order to tackle urgent problem of being poor in energy resources, we have no choice but to pay more attention to controlled thermal nuclear fusion in a considerably long period of time

[en] The serial diluted solutions of potassium iodide (KI) were analysed by GE Prospeed CT and the correlation between the concentration of KI and the CT value was observed. Discussing the feasibility of analysis of iodine with ²⁴¹Am photon source and the theoretical detectable level, we put forward the suggestion of establishing the immuno-X ray fluorescence analysis method

[en] Objective: To investigate the method, curative effect and advantages of interventional therapy for infants and young children with cervical and thoracic lymphatic malformations. Methods: The clinical records of 29 infants and young children (10 boys, 19 girls; mean age: 3 months; range: 2 months-3 years) with cervical and thoracic lymphatic malformations from October 2013 to December 2015 were reviewed. The type and size of the lymphatic malformation as well as its relationship with the adjacent organs and vessels were evaluated by ultrasound, CT and MRI. Pale yellow or hemorrhagic fluid was aspirated and sclerosing agent was injected under the guidance of ultrasound or digital subtraction angiography. Sclerotherapy was repeated, when necessary at 1-month follow-up. Results: Sclerotherapy was effective in all 29 infants and children after 1 (11), 2 (13), 3 (4), or 6 (1) treatments with > 70% volume reduction. Post-treatment complications included local swelling (17) and fever (3). There were no serious adverse reactions such as pulmonary inflammation and fibrosis. Conclusion: Percutaneous sclerotherapy is effective and safe for treatment of cervical and thoracic lymphatic malformations in infants and young children. (authors)

[en] The k-eigenvalue neutronics/thermal-hydraulics coupling calculation is a key issue for reactor design and analysis. Jacobian-free Newton-Krylov (JFNK) method, featured with super-linear convergence rate and high efficiency, has been attracting more and more attention to solve the multi-physics coupling problem. However, it may converge to the high-order eigenmode because of the multiple solutions nature of the k-eigenvalue form of multi-physics coupling issue. Based on our previous work, a modified JFNK with a line search method is proposed in this work, which can find the fundamental eigenmode together with thermal-hydraulics feedback in a wide range of initial values. In detail, the existing modified JFNK method is combined with the line search strategy, so that the intermediate iterative solution can avoid a sudden divergence and be adjusted into a convergence basin smoothly. Two simplified 2-D homogeneous reactor models, a PWR model, and an HTR model, are utilized to evaluate the performance of the newly proposed JFNK method. The results show that the performance of this proposed JFNK is more robust than the existing JFNK-based methods

[en] The BL14W1 beamline at Shanghai Synchrotron Radiation Facility (SSRF) is an X-ray absorption fine-structure (XAFS) beamline, for investigating atomic local structure, which is demanded extensively in the fields of physics, chemistry, materials science, environmental science and so on. The beamline is based on a 38-pole wiggler with the maximum magnetic field of 1.2 T. X-rays of 4.5-40 keV can be extracted by the optical scheme consisting of white beam vertical collimating mirror, liquid-nitrogen-cooled double crystal monochromator of Si(111) and Si(311), toroidal focusing mirror and higher harmonics rejection mirror. The maximum photon flux about 5 × 10¹² photons/s at the sample at 10 keV, with a beam size of 0.3 mm × 0.3 mm. The beamline is equipped with four types of detectors for experiments in either transmission or fluorescence mode. At present, quick-XAFS, grazing incidence XAFS, X-ray emission spectroscopy, high-pressure XAFS and time-resolved X-ray excited optical luminescence methods have been developed. (authors)

[en] A sensitive electrochemiluminescent (ECL) immunosensor was developed for real-time and dynamic evaluation of the concentration of interferon gamma (IFN-γ) that is secreted by peripheral blood mononuclear cells. IFN-γ is a diagnostic marker for latent infections with Mycobacterium tuberculosis (MTB), and its levels vary in response to drugs stimulation. The ECL immunosensor was fabricated by attaching gold nanoparticle-coated magnetic beads (AuNP-MB) on a nanofiber prepared from graphene oxide and poly aniline (GO-PANI-NF). The sensor possesses a three-dimensional structure nanocomposite that is beneficial for immobilization of primary antibodies (Ab1), and this enhances the intensity of ECL. The assay is based on a sandwich-type immuno reaction in which secondary antibodies (Ab2) labeled with CdS quantum dots (QDs) are used to generate ECL. The assay has a wide linear range (0.1–500 pg⋅mL"−"1) and a low detection limit (30 fg∙mL"−"1). The method was applied to real-time and dynamic determination of IFN-γ in supernatants of peripheral blood mononuclear cells in response to stimulation by chlorogenic acid. Conceivably, it may be used for monitoring the dynamic variation of biomarkers in cells supernatants in response to drug stimulation and to diagnose other infectious diseases. (author)

[en] 27 cases of lung tumor patients performed SPECT imaging 48 to 120 hours after injection of 185 MBq ⁶⁷Ga. 19(70%) showed positive result and undertook operation. 11 of the 19 patients performed SPECT imaging again 3 months after operation, 4 of 11 patients appeared new metastases. 6 months later 2 positive cases and 4 negative cases of the above 11 patients repeated ⁶⁷Ga imaging. In positive cases, the metastases increased, whereas in negative cases, new metastases discovered. All these result was the same as X-ray and CT. It was concluded that ⁶⁷Ga imaging is a simple and accurate method for the detection of recurrence, monitoring of therapeutic effect and treatment regime in lung tumor patients. ⁶⁷Ga imaging has its good clinical value

[en] Objective: To evaluate the effects of adaptive statistical iterative reconstruction V technique (ASIR-V) on radiation dose reduction and image quality in pediatric abdominal CT. Methods: 60 children were randomized into three groups of 20. All children underwent abdominal CT with 2.5-mm slice thickness, 9-HU noise index level of automatic current modulation, 10-450 mA, and 100 kV on a 256-row CT scanner. The rotation time was 0.5 s and detector width was 120-160 mm. The presetting ASIR-V percentage was 30%, 50% and 70% in Group A, Group B and Group C, respectively. The background noise index was measured as average standard deviations (SDs) on the posterior muscles at the level of porta hepatis, right lower renal pole, and pubic symphysis. The dose-length product (DLP) was recorded and effective dose (ED) was computed. Statistical analyses were performed using independent sample t test and ANOVA. Results: There was no significant difference(P > 0.05) in the SDs among the A(10.28 ± 1.03 HU), B(11.34 ± 0.82 HU), and C(9.34 ± 1.67 HU) groups with DLPs of 3.69 ± 17.55 mGy⋅cm, 55.73 ± 10.62 mGy⋅cm, and 37.65 ± 10.01 mGy⋅cm, respectively. The ED decreased significantly (P < 0.01) with increasing ASIR-V percentage at 2.57 ± 0.43 mSv, 1.78 ± 0.76 mSv, and 1.28 ± 0.75 mSv, respectively. Conclusion: The ASIR-V technique can effectively reduce the radiation dose without increasing image noise and is valuable in low-dose pediatric abdominal examination. (authors)

[en] Abstract Background: High energy resolution spectrometer can perform high energy resolution fluorescence detected X-ray absorption spectroscopy (HERFD-XAS), X-ray emission spectroscopy (XES), resonant X-ray emission spectroscopy (RXES), and other experiments. The energy resolution could be sub-eV level and the system can get more fine electronic structure information compared with the conventional spectral experimental methods. Purpose: This study aims to develop a data acquisition system of high energy resolution spectrometer based on LabVIEW at BL14W1 X-ray absorption fine structure (XAFS) station in Shanghai synchrotron radiation facility (SSRF). Methods: The hardware system includes two parts: VME motion control system for multi-dimension adjusting and silicon drift detector (SDD) fluorescence detector. The software architecture of the spectrometer consists of two parts, the experimental and physics industrial control system (EPICS) for motor control system and LabVIEW for data acquisition system (DAQ). LabVIEW's data logging and supervisory control (DSC) module is used for data exchange between the motion control system and the DAQ. Results: The energy resolution of this spectrometer is 0.5 eV, which can distinguish different compounds in the mixture. Conclusion: It is proved by experiment that the energy resolution and counting rate of this high energy resolution spectrometer has reached the level of the same kind of devices in the world. (authors)

[en] Based on the high-energy-resolution fluorescence spectrometer on the BL14W1 beamline at Shanghai Synchrotron Radiation Facility, an in-situ high-energy-resolution X-ray absorption spectroscopy technique, with an in-situ heating cell, was developed. The high-energy-resolution fluorescence detection for X-ray absorption near-edge spectroscopy (HERFD-XANES) was tested in a UO₂ oxidation experiment to measure the U L₃-edge, with higher signal-to-noise ratio and higher-energy-resolution than conventional XANES. The technique has potential application for in-situ study of uranium-based materials. (authors)