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Comparing surgical efficiencies between phacoemulsification systems: a single surgeon retrospective study of 2000 eyes 被引量:2
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作者 Luis Escaf-Jaraba Jorge Escobar-DiazGranados Bartolomé Valdemarín 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2022年第4期581-585,共5页
AIM: To compare under similar conditions intraoperative surgical efficiencies metrics between an active fluidics and a gravity based phacoemulsification systems.METHODS: Adult patients who were diagnosed with a catara... AIM: To compare under similar conditions intraoperative surgical efficiencies metrics between an active fluidics and a gravity based phacoemulsification systems.METHODS: Adult patients who were diagnosed with a cataract that compromised visual acuity inferior to 20/40 were included in the study. Patients were excluded from the study if they had a history of severe retinal disorders, clinically significant corneal endothelial dystrophy or history of corneal disease. All phacoemulsification surgeries were performed by a single surgeon. Both phacoemulsification systems used the 0.9 mm 45-degree aspiration bypass system Intrepid Balanced tip and the 0.9 mm Intrepid Ultra infusion sleeve. All cataracts were classified using the Lens Opacities Classification System III, cumulative dissipated energy(CDE) and aspiration fluids were measured in each surgery.RESULTS: Totally 2000 eyes were included in the study. Phacoemulsification was performed in 1000(50%) eyes with an active fluid dynamics system and in 1000(50%) eyes with a gravity-based fluidic system. Mean CDE until fracture of the lens was 1.1 and 1.9 percent-seconds and total mean CDE used was 5.6 and 7.2 percent-seconds using an active fluidics dynamics system and gravity-based fluidic system, respectively(P<0.001). Mean aspiration fluids used were 70 m L using an active fluidics dynamics system and 85 m L using a gravity-based fluidic system(P<0.001).CONCLUSION: This study evidences that surgeries performed under similar conditions(same surgeon, phaco tip and sleeve) with the active fluidics dynamics system required significantly lower CDE and aspiration fluids. 展开更多
关键词 OPHTHALMOLOGY PHACOEMULSIFICATION surgical ef ficiencies cumulative dissipated energy aspiration fluids
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Analysis of Phosphorus Nutrition Efficiency of Soybean Genotypes with Different Phosphorus Efficiency at Blooming Stage under Low Phosphorus Stress 被引量:2
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作者 张彦丽 《Agricultural Science & Technology》 CAS 2012年第12期2544-2548,共5页
[Objective] This study aimed to investigate the phosphorus nutrition effi- ciency of different soybean genotypes at blooming stage under low phosphorus stress. [Method] By using four "low phosphorus efficiency" soyb... [Objective] This study aimed to investigate the phosphorus nutrition effi- ciency of different soybean genotypes at blooming stage under low phosphorus stress. [Method] By using four "low phosphorus efficiency" soybean genotypes (D03, D05, D17 and D18) and four "high phosphorus efficiency" soybean genotypes (D31, D34, D37 and D38) as experimental materials, soil culture experiment was conduct- ed with two treatments of high phosphorus (+P) and low phosphorus (-P), to analyze the relationship between phosphorus content, phosphorus uptake, phosphorus use efficiency and phosphorus efficiency of soybean genotypes with different phos- phorus efficiency. [Result] Under low phosphorus conditions, four soybean genotypes with high phosphorus efficiency showed significant advantage in phosphorus uptake at seedling stage, to be specific, D34 showed relatively high phosphorus absorption capacity but no advantage in adaptability of phosphorus use efficiency, while only D37 showed relatively high phosphorus absorption capacity and phosphorus use ca- pacity. Correlation analysis and path analysis showed that the level of phosphorus efficiency of soybean at blooming stage under (-P) and (+P) treatments was mainly determined by phosphorus absorption capacity, and that under (-P) treatment was significantly greater than (+P) treatment. Phosphorus uptake and phosphorus use ef- ficiency under (-P) and (+P) treatments both showed great direct effects on phos- phorus efficiency, and phosphorus uptake made greater contribution; however, the indirect effects were relatively low, Under low phosphorus stress, the mechanisms for various soybean genotypes with high phosphorus efficiency to adapt to low phospho- rus stress were different, and phosphorus absorption efficiency (phosphorus uptake) was the main variation source of the phosphorus efficiency of various soybean genotypes at blooming stage. [Conclusion] This study revealed the contribution made by phosphorus absorption efficiency and phosphorus use efficiency to phosphorus efficiency of soybean. 展开更多
关键词 SOYBEAN Low phosphorus stress Phosphorus efficiency Absorption ef- ficiency Use efficiency
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CoMnMgAl Hydrotalcite-like Compounds and their Complex Oxides: Facile Synthesis and FCC SO_x Removal
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作者 Jiang Ruiyu Wang Min +5 位作者 Zhu Tao Zhou Yudong Song Xinyu Zhang Feng Ding Liang Gao Jian 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2019年第4期29-35,共7页
The X-CoMnMgAl hydrotalcite-like precursors(X-LDHs) were first synthesized by the coprecipitation method using Cl-, CO32-, NO3- and SO42- as the corresponding guest anions, which were further used to prepare X-CoMnMgA... The X-CoMnMgAl hydrotalcite-like precursors(X-LDHs) were first synthesized by the coprecipitation method using Cl-, CO32-, NO3- and SO42- as the corresponding guest anions, which were further used to prepare X-CoMnMgAl complex oxides(X-LDOs) through calcination. The structure and the surface morphology of the as-prepared samples were characterized by FT–IR, XRD, N2 adsorption-desorption and SEM. These as-prepared X-LDOs could act as sulfur-transfer catalysts for desulfurization. The activity of SOx adsorption and regeneration was evaluated via a self-assembled fixed-bed reactor simulating the conditions found in the fluid catalytic cracking units. These four types of sulfur-transfer catalysts with the same phase but different structure displayed the following order of desulfurization efficiency: CO3-LDO >Cl-LDO >NO3-LDO > SO4-LDO. 展开更多
关键词 coprecipitation method hydrotalcite-like compounds sulfur-transfer catalyst desulfurization ef ficiency
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A Mathematical Model to Characterize RH Desulfurization Process 被引量:1
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作者 Hong-bo YANG Shu-feng YANG +1 位作者 Jing-she LI Jiang-shan ZHANG 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2014年第11期995-1001,共7页
A physical model based on similarity principles was built to simulate RH desulfurization process. In order to quantitatively analyze RH desulfurization process, a mathematical model was proposed. By analyzing experime... A physical model based on similarity principles was built to simulate RH desulfurization process. In order to quantitatively analyze RH desulfurization process, a mathematical model was proposed. By analyzing experimental results with the mathematical model, an empirical formula whose determination coefficient was 0.98 was given to express the relationship between transient desulfurization efficiency and time. All the determination coefficients of four fitted curves based on four repeated experiments with different gas flow rates were more than 0.94, which was the exact evidence of the rationality of the empirical formula. Meanwhile, it was found that transient desulfurization ability increased firstly and then decreased with increasing gas flow rate and reached the maximum value when the gas flow rate was 1.8 m^3/h. A plenty of repeated trials showed the same rule, which validated the mathematical model and the conclusions obtained from physical experiments. 展开更多
关键词 RH transient desulfurization mathematical model physical experiment trial test clesul{urization e{ficiency
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Screening of Fungi from Chinese Medical Plants for Anti-Human Immunodeficiency Virus Type 1 Activity 被引量:1
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作者 Zi-Chun Xiang Yan Jiang Shun-Xing Guo 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2006年第4期488-490,共3页
In order to Isolate anti-human Immunodeflclency virus (HIV) agents from natural products, 97 ethanollc extracts of 90 fungi were tested for their Inhibitory activity on HIV-1. Most of the extracts tested were relati... In order to Isolate anti-human Immunodeflclency virus (HIV) agents from natural products, 97 ethanollc extracts of 90 fungi were tested for their Inhibitory activity on HIV-1. Most of the extracts tested were relatively non-toxic to human lymphocytic MT-4 cells, but extracts of some fungi exhibited potent antl-HIV activity In an in vitro 3-(4, 5-dlmethyl-2 thlazoyl)-2,5-dlphenyl-2H-tetrazollum bromide assay with a selectivity Index greater than 3. Most fungi were Isolated from Dendrobium sp. and Taxus sp. 展开更多
关键词 3-(4 5-dimethyl-2 thiazoyl)-2 5-diphenyl-2H-tetrazolium bromide method fungi extracts antihuman immunode ficiency virus.
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