In iron-based superconductor Fe(Se,Te), a flat band-like feature near the Fermi level was observed around the Brillouin zone center in the superconducting state. It is under debate whether this is the evidence on the ...In iron-based superconductor Fe(Se,Te), a flat band-like feature near the Fermi level was observed around the Brillouin zone center in the superconducting state. It is under debate whether this is the evidence on the presence of the BCS–BEC[Bardeen–Cooper–Schrieffer(BCS), Bose–Einstein condensation(BEC)] crossover in the superconductor. High-resolution laser-based angle-resolved photoemission measurements are carried out on high quality single crystals of FeSe_(0.45)Te_(0.55) superconductor to address the issue. By employing different polarization geometries, we have resolved and isolated the dyz band and the topological surface band, making it possible to study their superconducting behaviors separately. The dyz band alone does not form a flat band-like feature in the superconducting state and the measured dispersion can be well described by the BCS picture. We find that the flat band-like feature is formed from the combination of the dyz band and the topological surface state band in the superconducting state. These results reveal the origin of the flat band-like feature and rule out the presence of BCS-BEC crossover in Fe(Se,Te) superconductor.展开更多
目的:评价基于呼吸信号检测原理的BC120全自动血培养系统在特定注射剂产品中作为替代方法开展无菌检查的可行性。方法:收集2种不同类型的无菌制剂,考察在专属性、检测限和方法适用性等方面与中国药典无菌检查法是否存在差异。结果:在严...目的:评价基于呼吸信号检测原理的BC120全自动血培养系统在特定注射剂产品中作为替代方法开展无菌检查的可行性。方法:收集2种不同类型的无菌制剂,考察在专属性、检测限和方法适用性等方面与中国药典无菌检查法是否存在差异。结果:在严格按照BC120全自动血培养系统使用说明操作的前提下,该系统在专属性和检测限参数上与药典方法无显著差异,多数情况下比药典方法更快地报告阳性结果。结论:BC120全自动血培养系统在风险管理的前提下,经过验证,可作为药典无菌检查的替代方法用于特定注射剂产品的生产过程控制和快速放行。Objective: To evaluate the feasibility of BC120 blood culture system as an alternative method for sterility test. Methods: Two aseptic preparations were collected, to examine the differences between them and pharmacopoeia method in specificity, detection limit and method applicability. Results: According to the instructions of BC120 blood culture system, there is no significant difference between the system and the pharmacopoeia method in specificity and detection limit parameters, and in most cases, the positive results are reported faster than the pharmacopoeia method. Conclusions: Under the premise of risk management, BC120 blood culture system can be used as an alternative method for sterile testing in the production process of specific injection products for sterile quality control and rapid release after validation.展开更多
基金Projects supported by the National Key Research and Development Program of China(GrantNos.2021YFA1401800,2022YFA1604200,2022YFA1403900,and2023YFA1406000)the National Natural Science Foundation of China(Grant Nos.12488201,12374066,12074411,and 12374154)+3 种基金the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant Nos.XDB25000000 and XDB33000000)the Innovation Program for Quantum Science and Technology(Grant No.2021ZD0301800)the Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.Y2021006)the Synergetic Extreme Condition User Facility(SECUF)。
文摘In iron-based superconductor Fe(Se,Te), a flat band-like feature near the Fermi level was observed around the Brillouin zone center in the superconducting state. It is under debate whether this is the evidence on the presence of the BCS–BEC[Bardeen–Cooper–Schrieffer(BCS), Bose–Einstein condensation(BEC)] crossover in the superconductor. High-resolution laser-based angle-resolved photoemission measurements are carried out on high quality single crystals of FeSe_(0.45)Te_(0.55) superconductor to address the issue. By employing different polarization geometries, we have resolved and isolated the dyz band and the topological surface band, making it possible to study their superconducting behaviors separately. The dyz band alone does not form a flat band-like feature in the superconducting state and the measured dispersion can be well described by the BCS picture. We find that the flat band-like feature is formed from the combination of the dyz band and the topological surface state band in the superconducting state. These results reveal the origin of the flat band-like feature and rule out the presence of BCS-BEC crossover in Fe(Se,Te) superconductor.
文摘目的:评价基于呼吸信号检测原理的BC120全自动血培养系统在特定注射剂产品中作为替代方法开展无菌检查的可行性。方法:收集2种不同类型的无菌制剂,考察在专属性、检测限和方法适用性等方面与中国药典无菌检查法是否存在差异。结果:在严格按照BC120全自动血培养系统使用说明操作的前提下,该系统在专属性和检测限参数上与药典方法无显著差异,多数情况下比药典方法更快地报告阳性结果。结论:BC120全自动血培养系统在风险管理的前提下,经过验证,可作为药典无菌检查的替代方法用于特定注射剂产品的生产过程控制和快速放行。Objective: To evaluate the feasibility of BC120 blood culture system as an alternative method for sterility test. Methods: Two aseptic preparations were collected, to examine the differences between them and pharmacopoeia method in specificity, detection limit and method applicability. Results: According to the instructions of BC120 blood culture system, there is no significant difference between the system and the pharmacopoeia method in specificity and detection limit parameters, and in most cases, the positive results are reported faster than the pharmacopoeia method. Conclusions: Under the premise of risk management, BC120 blood culture system can be used as an alternative method for sterile testing in the production process of specific injection products for sterile quality control and rapid release after validation.
