[en] Objective: To have a systemic review of the efficiency of ¹⁸F-fluorodeoxyglucose (FDG) PET in diagnosing solitary pulmonary nodules (SPNs). Methods: Authors searched the medline database and picked out the articles about diagnosing SPNs with FDG PET. Firstly, authors evaluated the quality of the articles according to the standard of diagnostic test recommended by the Cochrane Workshop. Then authors drew the summary receiver operating characteristic (ROC) and did the Meta-analysis with the Meta-view software from the Cochrane Centre. Finally, authors compared the efficiency of the qualitative and semi-quantitative methods in diagnosis of SPNs. Results: Fourteen articles entered this Meta-review, the quality level of which were a and b. Because no significant model could be obtained for the qualitative method, authors only drew the summary ROC of the semi-quantitative method and the surface area under the curve was 0.91. With the fixed effect model, the pooled odds ratio (OR) of the semi-quantitative and qualitative method were 26.97 and 39.05, respectively. Except OR, there was no significant difference between the two methods in regard to the sensitivity and specificity. Conclusions: The articles entered into this Meta-review were of high quality. The pooled OR shows that FDG PET is more efficient in positive diagnosis

[en] Objective: to explore the changes and the tendency of breast cancer radiotherapy in China within the past decade. Methods: A survey on breast cancer radiotherapy in 1999 and 2006 was conducted in 4 hospitals located within the southeast coastal region of China, including patients' clinical characteristics, the purpose of radiotherapy and its techniques. Results: The percentage of breast conservative treatment (BCT) increased from 3% in 1999 to 13% in 2006. For radiotherapy techniques in 2066 compared with 1999, the growth trend was found in use of breast immobilization devices (80% vs. 46%), treatment planning system (70% vs. 23%), and CT simulation (14% vs. 0). The frequency was increased in the chest wall irradiation after mastectomy (90% vs. 67%), but decreased in internal mammary region (30% vs. 76%) and axilla (37% vs. 69%) treatment. There were no differences in total dose and fractionation prescription. Conclusions: BCT was performed more frequently, but post-mastectomy radiotherapy was still essential option in China at present. Although some advanced techniques were applied frequently in clinical practice. Simulation, treatment planning, and irradiation target design were urgent for improvement and standardization. (authors)

[en] Highlights: • Porous TiO₂@UIO-67-Zr/Ti was constructed by microwave-assisted PSE method. • Ti⁴⁺ is coordinated into the frameworks of UIO-67 materials with PSE method. • The combination of TiO₂ with UIO-67-Zr/Ti can widen the light absorption range. • The interactions between TiO₂ and UIO-67-Zr/Ti can be proved by Raman and FT-IR. • TiO₂@UIO-67-Zr/Ti can oxidize HMF to DFF at low temperature under air condition. It is of significance for this society to develop and utilize sustainable energy and renewable resources. Photocatalytic the transformation of biomass exhibits a variety of seductive advantages, including cost-effectiveness, sustainability, mild reaction conditions and environment-benign properties. However, in order to obtain a relative high yield, most photocatalytic oxidation of HMF systems employ O₂ as sole oxidant or adopt high light density condition, which is much higher than the natural sunlight density. In this work, we employ microwave-assisted post-synthetic metal exchange (PSE) method to synthesize porous TiO₂@UIO-67-Zr/Ti composite as photocatalyst for the oxidation of HMF to DFF under air condition at low temperature (4 ^oC). SEM and FT-IR characterizations confirm the successful cation exchange of Ti⁴⁺ with Zr⁴⁺, and the Raman spectra confirm the existence of strong interactions between TiO₂ and UIO-67-Zr/Ti. This catalyst exhibits enhanced photocatalytic performance, achieving 94% conversion with more than 70% selectivity for DFF. Moreover, this system also exhibits wide substrates compatibility.

[en] Non-equilibrium kinetic intermediates are usually preferentially generated instead of thermodynamic stable phases in the solid-state synthesis of layered oxides. Understanding the inherent complexity between thermodynamics and kinetics is important for designing high cationic ordering cathodes. Single-crystal strategy is an effective way to solve the intrinsic chemo-mechanical problems of Ni-rich cathodes. However, the synthesis of high-performance single-crystal is very challenging. Herein, the kinetic reaction path and the formation mechanism of non-equilibrium intermediates in the synthesis of single-crystal Co-free Ni-rich were explored. We demonstrate that the formation of non-equilibrium intermediate and the electrochemical-thermo-mechanical failure can be effectively inhibited by driving low-temperature topotactic lithiation. This work provides a basis for designing high-performance single-crystal Ni-rich layered oxides by regulating the defective structures. (© 2023 Wiley‐VCH GmbH)