[en] Using new data from the Υ(4s) resonance and nearby continuum e⁺e^- annihilation taken with the CLEO II detector at CESR, the authors have substantially improved the previous CLEO measurement of Γ(D⁺_s → μ⁺ν)/Γ(D⁺_s → φπ⁺)

[en] This study was to evaluate the efficiency and safety of ^99mTc-HIgG as the tracer for detection of focal inflammatory lesions in abdomen. We have studied 57 in-patients (31 women and 26 men, mean age = 35 ± 15, range 20-49 yr) with 20 cases of pelvicellulitus, 30 cases of Inflammatory bowel diseases, 7 cases of abdominal abscess. All their diagnosis were based on clinical signs and various types of laboratory data and other imaging modalities. Scanning was performed at 1,2,4,6 hr delays or 24 hr if necessary after intravenous administration of 740 MBq of ^99mTc-HIgG. ^99mTc-HIgG was avidly taken up by acute pelvis inflammation lesions and performed less well in 2 chronic cases, so the positive rate was 90%. Of 30 cases IBD, 13 Crohn's disease, 17 ulcerative colitis, 12 patients with Crohn's disease at active stage were positive, 15 patients with ulcerative disease at active stage were positive, so the sensitivity was 92% and 88% respectively. There is no significant image in patients at relieve stage. Meanwhile they have good coincidence with the result of endoscopy and X-Rays. The sensitivity in 7 cases with pur in abdominal cavity was 100%. ^99mTc-HIgG is proved to be effective in detecting focal site of inflammation in the abdomen. Provide clinically useful assessment of disease activity and reponse to therapy. Safe, convenient and no side effects. Physiological accumulation in some tissues such as the liver makes it difficult to localize

[en] Background: The objective of this study was to evaluate the efficiency and accuracy of this novel PET/CT quantitative method for staging and follow up of 18F-FDG avid lymphoma, and its impact on increasing the dependence on PET for evaluation of bone marrow involvement and compare it with manual analysis reporting. Methodology: 44 patients with newly diagnosed B-cell lymphoma were enrolled into this study. Mean liver SUV was measured by placing a 14 ml cubic volume of interest into the liver, a smoothing filter to segmented bones from CT to create a bone mask was applied. For each patient, all lesions were segmented by using a HERMES tumour finder application with automatic 3D region-growing algorithm with a defined minimum SUV threshold [LiverSUVmean+SD*2.00]. This computation, after removal of physiological activity above the measured threshold, defined the metabolic tumour volume (MTV), and the total lesion glycolysis (TLG) was then calculated as [TLG=SUVmean*MTV]. Processing time was recorded for each study. Automatic staging and follow up results were compared with manual analysis method. Results: 31 bone lesions were detected by quantitative application while 13 lesions by visual analysis (P<0.05). The quantitative application resulted in a change of disease staging in 7 patients (15.9%), upstaging in 5 (11.4%) and downstaging in 2 (4.5%). Lower values of total MTV and cumulative TLG were highly predictive of favourable outcomes in progression-free survival (PFS)in ROC analysis. In addition, the average processing time of quantitative and manual analysis was 2±0.2, and 21.2±3.2 minutes respectively. Conclusion: This quantitative method is user friendly, independent, much faster repeatable and reliable. It should be used in structured quantitative clinical reporting for routine clinical practice for staging and follow up of 18F–FDG avid lymphomas. (author)

[en] A pseudospark-sourced electron beam has two phases, an initial hollow cathode phase (HCP) beam followed by a conductive phase (CP) beam. The beam brightness was measured by a field-free collimator to be 10⁹ and 10¹¹ A m^-2 rad^-2 for HCP beam and CP beam, respectively. The initial HCP beam from an eight-gap pseudospark discharge was applied in a Cherenkov interaction between the electron beam and the TM₀₁ mode of a 60-cm long alumina-lined waveguide. While the CP beam from a three-gap pseudospark discharge chamber was propagated and post-accelerated from about 200 V to more than 40 kV

[en] The compaction and diagenesis of sandstones that form reservoirs to hydrocarbons depend on mechanical compaction processes, fluid flow at local and regional scales, and chemical processes of dissolution, precipitation and diffusional solution transport. The compaction and distortional deformation of quartz aggregates exposed to reactive aqueous fluids have been investigated experimentally at varying critical and subcritical stress states and time scales. Pore fluid compositions and reaction rates during deformation have been measured and compared with creep rates. Relative contributions of mechanical and chemical processes to deformation and pore structure evolution have been evaluated using acoustic emission (AE) measurements and scanning electron microscope (SEM) observations. At the subcritical conditions investigated, creep rates and acoustic emission rates fit transient logarithmic creep laws. Based on AE and SEM observations, we conclude that intragranular cracking and grain rearrangement are the dominant strain mechanisms. Specimens show little evidence of stress-enhanced solution transfer. At long times under wet conditions, the dominant strain mechanism gradually shifts from critical cracking at grain contacts with high stress concentrations to fluid-assisted sub-critical cracking

[en] The nondestructive analysis technique of single fluid inclusions by SRXRF microprobe at BSRF was developed. To test the method, a scanning analysis result of a single fluid inclusion in quartz crystal was presented. With this technique, the semi-quantitative inorganic compositions of two typical individual organic fluid inclusions were also determined by using a thin glass film of known compositions as a standard

[en] Zn (140 keV) channeled (along <0001>) implantations in GaN are performed at room temperature and in a dose range from 1x10¹³ to 4x10¹⁶ cm^-2, respectively. Channeling RBS measurements and the high-resolution XTEM investigations show the two damage regimes after implantation: one at the surface and another in the projected range. The damage level is very small at low doses and then gradually rises with increasing dose. The backscattering yield from the near surface region reaches the random level at doses higher than 2x10¹⁶ cm^-2 and the broken crystals and the amorphous in nanometer size are formed in the top thin surface layer after implantation at a dose of 3x10¹⁶ cm^-2. In the followed defective crystalline layer, the density of defects decreases with increasing the depth. The thread defects and loops are dominant in the region close to the surface at high dose and the clustered point defects are dominant in the deeper layer

[en] Objective: To analyse the expression of serum periostin in patients with non-small cell lung cancer (NSCLC) and its clinical significance. Study Design: Descriptive study. Place and Duration of study: General Hospital of Ningxia Medical University, Yinchuan, China, from October 2018 to October 2019. Methodology: Patients with NSCLC, benign lung lesions, and healthy volunteers (controls) were enrolled. Serum periostin level of all the patients with NSCLC was determined by the enzyme-linked immunosorbent assayed upon admission. The receiver operating characteristic (ROC) curve was used to evaluate the value of serum periostin predicting metastasis and recurrence. Results: The serum periostin level in the NSCLC group (n=66) was significantly higher than that of the benign group (n=40), control group (n= 38, p<0.001), and in patients with different T and N stages in the NSCLC group (p<0.001). The serum levels of periostin in patients with metastasis and recurrence within one year were significantly higher than those without that (p<0.001). When the serum periostin level was 54.12 ng/mL, the area under the curve (AUC) predicting postoperative recurrence of NSCLC in patients was 0.739, with 69.23% sensitivity and 75.47% specificity. When the serum periostin level was 42.84 ng/mL, the AUC predicting postoperative metastasis of NSCLC in patients was 0.831, with 80.00% sensitivity and 82.93% specificity. Conclusion: Serum periostin level is possibly related to the progression of NSCLC and exhibited certain predictive values for the prognosis of NSCLC patients. The value of periostin level predicting metastasis was greater than predicting recurrence at the studied levels. (author)

[en] Objective: To compare the uptake of antimony colloid, sulfur colloids and DX in the parasternal lymph node of rabbits and to investigate which one is the most suitable for locating sentinel lymph node. Methods: Six rabbits were used in this auto-control study. Radio labeled sulfur colloids, antimony colloid or DX was injected subcutaneously at both side of the xiphoid process. For each rabbit, which pharmaceutical injected firstly and secondly was at random. At first, one of the three pharmaceuticals was used. After a certain period of time, radioactivity of the chest wall of the rabbits was detected. If the radioactivity was proven to be as low as background, another kind of radiopharmaceuticals was injected and the radioactivity was detected. Then after another period of time, the last radiopharmaceutical was injected if the radioactivity of the chest wall was proven to be low enough. The sites of injection were marked. Whole body scan was performed at different time after injection. Radioactivity of the parasternal lymph node and the injected sites was detected with gamma probe. Uptake-time curves were drawn for the three radiopharmaceuticals. The relationship between size of particle and lymphatic uptake rate was studied. Results: At 4 hours after injection, the percent uptake of DX, sulfur colloids and antimony colloid was 10.41% +/- 0.92%, 3.16% +/- 0.30% and 8.06% +/- 0.50, respectively. The difference among the uptake rate of the three radiopharmaceuticals in the parasternal lymph node was statistically significant (p<0.05). The radiopharmaceutical that is the smallest in diameter in this research was DX, which moved quickly along the lymphatic chain. The ratio of radioactivity of the first lymph node to other lymph node along the lymphatic chain was not high enough and the first lymph node can not be easily identified by gamma probe. Sulfur colloid was the largest in diameter. It was trapped by the first lymph node along the lymphatic chain after being injected subcutaneously. The radioactivity of other lymph node along the lymphatic chain was very low. Conclusions: The uptake rate of the three radiopharmaceuticals was statistically significant. The uptake in lymph node was related to the mean size and other features of particles. Sulfur colloid maybe the most suitable for locating sentinel lymph node

[en] The SRXRF microprobe at the BSRF is described. The minimum detection limits (MDLs) of trace elements were measured to determine the capability for biological sample analysis. The changes of the trace elements and their ratios in the normal and tumor parts of a human osteosarcoma tissue were investigated. It was found that our results were in agreement with those of other analytical methods, such as spectrophotometric analysis, NAA and PIXE as well as an early clinic study of serum