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利用综合孔径射电望远镜对太阳进行观测时，通过对图像中存在的明亮扩展源进行准确建模并移除，可以更好地观测视场内的微弱源并提高图像的动态范围。在射电天文领域，主要利用CLEAN算法对图像中的明亮源进行移除，以显示微弱的背景。然而，使用图像像素作为基函数的CLEAN算法的固有限制导致其对扩展源的建模效果较差。为了克服这种限制，将基于长椭球面波函数（Prolate Spheroidal Wave Functions, PSWF）的去卷积方法应用于太阳射电成像。PSWF最优正交基由脏图中的感兴趣区域（Region of Interest, ROI）和UV覆盖共同决定。为了验证该方法的有效性，基于PSWF正交基对均匀圆环阵观测的太阳射电图像进行去卷积，并从动态范围和保真度两个方面定量化对比了CLEAN算法和基于PSWF正交基方法的性能。基于PSWF正交基去卷积方法剩余脏图中的微弱源更接近真实情况且动态范围更高。

To retrospectively analyze the clinical data of a patient with confocal laser endomicroscopy, and summarize nursing measures such as preoperative preparation, intraoperative coordination, postoperative care of adverse reaction care, psychological care and other targeted nursing interventions. It is required to carried comprehensive nursing interventions to reduce patient discomfort and ensure the success of confocal laser endomicroscopy. (本文总结1例行共聚焦激光显微内镜检查术患者的护理配合要点, 包括术前准备、术中配合以及术后常规护理、不良反应护理、心理护理等针对性护理措施, 以减轻患者不适症状, 保障患者共聚焦激光显微内镜检查的顺利完成。)

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Essential oils extracted from natural plants can serve as safe food additives, compared with conventional chemical or synthetic additives. Essential oils have also been incorporated into food packaging materials to impart their bacteriostatic and antioxidant properties. Among them, thymol (THY), a monoterpene phenolic compound extracted from the thyme plant, has been used as a bacteriostatic agent in active packaging materials with functional properties, due to its significant bacteriostatic properties. However, the activity of highly volatile THY is easily affected by the packaging environment. Therefore, appropriate techniques are needed to incorporate the THY into polymer matrices, in order to improve its stability and utilization for controlled release. This study aims to prepare the potato starch films of active packaging, taking the mesoporous nano-silica (mobil composition of matter No. 41, MCM-41) as the controlled-release carrier of THY (THY-MCM-41), potato starch as the film-forming substrate, glycerol as the plasticizer, and calcium chloride as the cross-linking agent. Single-factor experiments were carried out to determine the suitable additive ranges of potato starch, glycerol, calcium chloride, and THY-MCM-41 mass concentration in the packaging film. The L9 (34) orthogonal test was also implemented to investigate the interactive effects of potato starch, glycerol, calcium chloride, and THY-MCM-41 on the thickness, opacity, moisture absorption (MA), water vapor permeability (WVP), tensile strength (TS), and elongation at break (EB) of the packaging film. The optimal conditions were obtained to prepare the potato starch films of active packaging. A systematic investigation was made to clarify the THY release kinetics in the optimal combination of packaging film at different temperatures and relative humidity (RH) environments. A prediction model of THY release was constructed to optimize the THY. The results showed that the optimal properties of the prepared packaging film A were achieved in the TS, MA, WVP, oxygen permeability (OP) and opacity were 7.16 MPa, 89.23%, 1.42 × 10-10 g/(m·s·Pa), 1.02 × 10-15 cm²/s·Pa, and 1.16 mm-1, respectively, when the mass concentrations of potato starch, glycerol, calcium chloride and THY-MCM-41 were 0.04, 0.015, 0.005, and 0.005 g/mL, respectively. Scanning electron microscope (SEM) and Fourier-transformed infrared (FTIR) spectroscopy confirmed that the denser and more uniform microstructure of packaging film was observed, where THY-MCM-41 was uniformly dispersed in the potato starch film, indicating better compatibility with potato starch. Thermogravimetric (TG) analysis showed that the encapsulation of MCM-41 improved the stability of THY in the potato starch film. In addition, the release kinetics of THY in the potato starch film of active packaging demonstrated that the initial explosive release was shifted to a subsequent sustained release under different temperature-RH environments. The active packaging film was prepared to effectively control the release rate of THY for the effective time of THY up to 10d. The release pattern of THY was in accordance with the First-order release model (R² > 0.980), and the release index “n” was less than 0.5, indicating that the release behavior of THY followed Fickian diffusion law. This finding can also provide the theoretical foundation for the precise release of active substances in the development of active packaging films. [ABSTRACT FROM AUTHOR]

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【Objective】The study was conducted to explore the changes in quality of different varieties of fresh sweet potato during storage, which would provide data support and theoretical guidance for the research of storage quality and scientific storage of fresh sweet potato.【Method】In the study, six fresh sweet potato varieties, ‘AN’ ‘G42’ ‘G87’ ‘G72’ ‘G79’ and ‘P32’ were stored at temperature of 18 (±1)℃ and humidity of 70 (±2)% for 60 days. The change rules of indicators such as rot rate, weight loss rate, dry matter weight, amylase activity, starch, soluble sugar, carotenoids and flavor during storage and correlation analysis of these indicators were studied.【Result】After 60 days of storage，the rot rates of ‘AN’ ‘G79’ and ‘P32’ reached 60.87%, 50.00% and 44.00%, showing serious rot; while the rot rates of ‘G87’ and ‘G72’ were only 12.50% and 8.70%. The soluble sugar content and flavor of six fresh sweet potato varieties increased with the extension of storage time, while the starch content decreased. The β-amylase was the main amylase in fresh sweet potato, and the β-amylase activity of ‘G42’ ‘G87’ ‘G79’ and ‘P32’ decreased by 30% to 50% during storage, while that of other varieties decreased by about 10%. In addition, compared with before storage, the carotenoid contents of ‘AN’ and ‘G42’ decreased by 17% to 23% after storage, while the carotenoid contents of the ‘G87’ and ‘G72’ increased by 22% to 36%. After storage for 60 days, there was no significant difference in carotenoids content between ‘G79’ and ‘P32’ compared with that before storage.【Conclusion】The six varieties of fresh sweet potato showed different storage characteristics during storage, among which ‘G87’ and ‘G72’ had a low rot rate during storage, and the storage period could be extended appropriately. ‘G42’ ‘G79’ and ‘P32’ began to rot after 30 days of storage and were not suitable for long-term storage. The flavor of ‘AN’ increased significantly after 15 days of storage, but extensive rot appeared after 45 days of storage. [ABSTRACT FROM AUTHOR]

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Climate comfort is an important indicator of the attractiveness of tourist destinations, and its impact on the tourism industry has been paid attention to by scholars. According to the daily meteorological data of China from 1990 to 2020, the climate comfort level model was used to classify the climate comfort level, and the spatio-temporal evolution law of China's climate comfort level was explored, and then the influence of climate comfort level on domestic and inbound tourists in various provinces and regions was explained through the second-order partial correlation analysis. The results show that: ① The spatial distribution of China's climatic comfort zones shows obvious zonal distribution law, and there is also a certain degree of longitude inclination under the influence of topography, and the spatial distribution of climatic discomfort zones is basically locked by Hu Huanyong line and ladder dividing line. ② Since 1990, China's climate comfort index has not shown an obvious downward trend in most regions, and China's climate as a whole is developing in a more livable and comfortable direction. ③ Climate comfort level is an important factor affecting the tourism market in most regions, and the comfort level of Qinghai, Ningxia, Gansu, Hainan and Beijing has the most obvious influence on the number of tourists. [ABSTRACT FROM AUTHOR]

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To investigate the predictive value of three-dimensional ultrasound vascular blood flow parameters combined with serum carbohydrate antigen-125 (CA125) and thymidine kinase 1 (TK1) on the prognosis of patients with endometrial cancer. 209 patients with endometrial cancer who underwent laparoscopic hysterectomy in our hospital from November 2018 to June 2021 were selected, three-dimensional ultrasound was performed before operation, to observe vascular blood flow parameters [vascularization index (VI), blood flow index (FI) and vascularization-blood flow index (VFI) ], and preoperative serum CA125 and TK1 levels were detected. Patients were followed up for 2 years after operation, and the incidence of poor prognosis was counted. Patients were divided into poor prognosis group and good prognosis group according to the prognosis. The value of three-dimensional ultrasound vascular blood flow parameters combined with serum CA125 and TK1 in predicting poor prognosis of patients with endometrial cancer were analyzed by receiver operating characteristic (ROC) curve. 2 cases were lost during the follow-up period, and 54 cases had poor prognosis. The levels of VI, FI, VFI, serum CA125 and TK1 in poor prognosis group were higher than those in good prognosis group (P<0.05). The area under the curve of VI, FI, VFI, CA125 and TK1 in predicting the poor prognosis of patients with endometrial cancer was 0.764, 0.775, 0.809, 0.867 and 0.807, respectively, the area under the curve of combined prediction was 0.916, which was higher than that of each index alone. The three-dimensional ultrasound vascular blood flow parameters VI, FI, VFI and serum CA125 and TK1 levels in patients with endometrial cancer increased, and three-dimensional ultrasound vascular blood flow parameters combined with CA125 and TK1 detection have high value in predicting the poor prognosis of patients with endometrial cancer. [ABSTRACT FROM AUTHOR]

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