Haze is a pollution weather phenomenon that has been widely concerned by people in recent years. It has a significant impact on people’s production, life, and health. This study focuses on large-scale haze weather th...Haze is a pollution weather phenomenon that has been widely concerned by people in recent years. It has a significant impact on people’s production, life, and health. This study focuses on large-scale haze weather that happened in eastern China in late January 2021. The research uses multi-party data and synoptic analysis methods to analyze the occurrence, evolution, and end of the haze weather. The polar vortex, the change of the atmospheric circulation, the change of the cold air force, the temperature and humidity, and the rain and snow weather are the important reasons for this weathering process. It can be used for reference in future research on haze weather.展开更多
With the rapid development of industrialisation and urbanisation, China is facing the challenge of severe HF (Haze-Fog) pollution. This essay compares the advantages and disadvantages of China’s HF management and sum...With the rapid development of industrialisation and urbanisation, China is facing the challenge of severe HF (Haze-Fog) pollution. This essay compares the advantages and disadvantages of China’s HF management and summarizes the important lessons China can teach the rest of the world about applying this tactic. China’s capabilities in the digital economy, National Innovation Demonstration Zones, and urban innovation systems are examined in this article, along with its shortcomings in information mechanisms and pollution sources. This essay also summarizes China’s achievements, particularly regarding local autonomy. The essay goes on to say, however, that China is probably going to be under more pressure to manage HF in the future, both in terms of long-term solutions and the economy.展开更多
AIM: To compare transforming growth factor-β1 (TGF- β1 ) levels in tears and the degree of corneal haze formation following epithelial laser in situ keratomileusis (Epi -LASIK) with and without the use of mitomycin ...AIM: To compare transforming growth factor-β1 (TGF- β1 ) levels in tears and the degree of corneal haze formation following epithelial laser in situ keratomileusis (Epi -LASIK) with and without the use of mitomycin C (MMC) and to investigate the effect of MMC on corneal wound healing. ·METHODS: Thirty-two patients (64 eyes) with high myopia underwent Epi -LASIK surgery, and MMC was randomly used in one eye in each patient. The epithelialization process was observed, and the TGF -β1 level in tears was measured at 1 day, 3, and 7 days postoperatively for comparison with baseline. Corneal haze was graded at 1 month, 3, and 6 months after surgery. · RESULTS: Mean preoperative spherical equivalent refraction was -8.24 ±2.18D (range-6.00 to -10.50D) in the MMC group and -7.82±1.55D (range -6.00 to -9.75D) in the non -MMC group. There was no significant difference between the two groups (P =0.38). Mean epithelialization time was (5.02 ±0.68) days in the MMC group and (4.86±0.57) days in the non-MMC group (P = 0.31). Tear fluid TGF-β1 levels were similar before surgery (P =0.34), but were significantly higher in the non-MMC group at 1 day, 3, and 7 days postoperatively (P =0.004, 0.008, and 0.012, respectively). Corneal haze scores 1 month after surgery were significantly higher in the non -MMC group (P =0.03), and similar at 3 and 6 months after surgery (P =0.28 and 0.62, respectively). ·CONCLUSION: MMC did not delay epithelialization. Inearly postoperative period, lower TGF -β1 levels in tears and a lower grade of corneal haze were observed in the MMC group. Our findings suggest that the ability of MMC to inhibit Epi -LASIK -induced haze might be mediated through TGF-β1 suppression.展开更多
文摘Haze is a pollution weather phenomenon that has been widely concerned by people in recent years. It has a significant impact on people’s production, life, and health. This study focuses on large-scale haze weather that happened in eastern China in late January 2021. The research uses multi-party data and synoptic analysis methods to analyze the occurrence, evolution, and end of the haze weather. The polar vortex, the change of the atmospheric circulation, the change of the cold air force, the temperature and humidity, and the rain and snow weather are the important reasons for this weathering process. It can be used for reference in future research on haze weather.
文摘With the rapid development of industrialisation and urbanisation, China is facing the challenge of severe HF (Haze-Fog) pollution. This essay compares the advantages and disadvantages of China’s HF management and summarizes the important lessons China can teach the rest of the world about applying this tactic. China’s capabilities in the digital economy, National Innovation Demonstration Zones, and urban innovation systems are examined in this article, along with its shortcomings in information mechanisms and pollution sources. This essay also summarizes China’s achievements, particularly regarding local autonomy. The essay goes on to say, however, that China is probably going to be under more pressure to manage HF in the future, both in terms of long-term solutions and the economy.
基金Medical Scientific Foundation of Guangdong Province, China (No. B2010249)
文摘AIM: To compare transforming growth factor-β1 (TGF- β1 ) levels in tears and the degree of corneal haze formation following epithelial laser in situ keratomileusis (Epi -LASIK) with and without the use of mitomycin C (MMC) and to investigate the effect of MMC on corneal wound healing. ·METHODS: Thirty-two patients (64 eyes) with high myopia underwent Epi -LASIK surgery, and MMC was randomly used in one eye in each patient. The epithelialization process was observed, and the TGF -β1 level in tears was measured at 1 day, 3, and 7 days postoperatively for comparison with baseline. Corneal haze was graded at 1 month, 3, and 6 months after surgery. · RESULTS: Mean preoperative spherical equivalent refraction was -8.24 ±2.18D (range-6.00 to -10.50D) in the MMC group and -7.82±1.55D (range -6.00 to -9.75D) in the non -MMC group. There was no significant difference between the two groups (P =0.38). Mean epithelialization time was (5.02 ±0.68) days in the MMC group and (4.86±0.57) days in the non-MMC group (P = 0.31). Tear fluid TGF-β1 levels were similar before surgery (P =0.34), but were significantly higher in the non-MMC group at 1 day, 3, and 7 days postoperatively (P =0.004, 0.008, and 0.012, respectively). Corneal haze scores 1 month after surgery were significantly higher in the non -MMC group (P =0.03), and similar at 3 and 6 months after surgery (P =0.28 and 0.62, respectively). ·CONCLUSION: MMC did not delay epithelialization. Inearly postoperative period, lower TGF -β1 levels in tears and a lower grade of corneal haze were observed in the MMC group. Our findings suggest that the ability of MMC to inhibit Epi -LASIK -induced haze might be mediated through TGF-β1 suppression.
