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窄孔分布介孔分子筛MSU-1的合成(英文) 被引量:2
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作者 李苑 YANGJun +8 位作者 TANGYu bailiang XIANGHong-wei LIYong-wang 杨骏 唐渝 白亮 相宏伟 李永旺 《燃料化学学报》 EI CAS CSCD 北大核心 2003年第2期171-173,共3页
以水玻璃为硅源,在pH=3以下合成MSU X介孔材料的报道很少,本文将pH范围扩展至0 78,并从廉价的水玻璃和工业级非离子表面活性剂AEO9出发,用二步法合成出介孔分子筛MSU 1。首先将无机前驱体和非离子表面活性剂在介稳态下(pH≈2,t≈2℃)混... 以水玻璃为硅源,在pH=3以下合成MSU X介孔材料的报道很少,本文将pH范围扩展至0 78,并从廉价的水玻璃和工业级非离子表面活性剂AEO9出发,用二步法合成出介孔分子筛MSU 1。首先将无机前驱体和非离子表面活性剂在介稳态下(pH≈2,t≈2℃)混合,然后调pH至所需值(0 78~3 94),在该pH值下进行二氧化硅缩聚。合成出的MSU 1具有孔分布窄,短程有序度提高,颗粒呈微米级等特点。其中在pH=1 98下合成的MSU 1具有最薄的孔壁、最大的比表面和孔容;在pH=0 78下合成的MSU 1具有最厚的孔壁、最大的孔径和d100值。随着pH值的增大,孔壁厚度先减小后增大。 展开更多
关键词 窄孔分布 介孔分子筛 MSU-1 合成 水玻璃 硅酸钠 非离子表面活性剂
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Evaluation of Clinical Effect of Panretinal Photocoagulation in the Treatment of Proliferative Diabetic Retinopathy
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作者 bailiang 《外文科技期刊数据库(文摘版)医药卫生》 2022年第9期134-138,共5页
Objective: to analyze the short-term and long-term effects of panretinal photocoagulation in the treatment of proliferative diabetic retinopathy, and to explore the effect of this treatment method on the choroidal thi... Objective: to analyze the short-term and long-term effects of panretinal photocoagulation in the treatment of proliferative diabetic retinopathy, and to explore the effect of this treatment method on the choroidal thickness and the safety of the treatment. Methods: 80 patients with proliferative diabetic retinopathy who were treated in our hospital were sampled by cluster sampling, and the inclusion period ranged from March 2019 to March 2021. According to different treatment methods, the patients were divided into two groups for controlled study, namely the reference group (40 cases, drug treatment) and the observation group (40 cases, drug + panretinal photocoagulation). The following indexes were used to evaluate the clinical effect of the operation method in the observation group: before and after treatment, the two groups of short-term efficacy indexes (IOP, visual acuity) were compared and analyzed;before and after treatment, the choroidal thickness (ICT, SCT, NCT) of the two groups was compared and analyzed , TCT, SFCT);after treatment, the two groups of treatment safety (complications) were compared and analyzed, followed up for 12 months, and the long-term efficacy (disease progression, vision correction) of the two groups was compared and analyzed. Results: compared with the reference group, the visual acuity score of the observation group after treatment was more superior (P<0.05), and there was no significant difference in the intraocular pressure level between the two groups (P>0.05). Compared with the reference group, the thickness measurement results of ICT, SCT, NCT, TCT and SFCT in the observation group were significantly lower (P<0.05). There was no significant difference (P>0.05);from the perspective of long-term efficacy: compared with the reference group, the observation group had better control of disease progression and vision correction within 12 months (P<0.05). Conclusion: the short-term and long-term effects of panretinal photocoagulation in the treatment of proliferative diabetic retinopathy are ideal. This operation can effectively reduce the choroidal thickness, and has high safety. It is recommended for clinical use. 展开更多
关键词 panretinal photocoagulation proliferative diabetic retinopathy choroidal thickness
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