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Determination of the time of refractive stability after uneventful phacoemulsification in Indian eyes

World Journal of Experimental Medicine 2024年第2期14卷 89-96页

作者： Ashok Kumar Nanda Bijnya Birajita Panda Asish Swain logesh balak.ishnan Department of Ophthalmology Kar Vision Eye HospitalBhubaneswar 751013OdishaIndia Department of Ophthalmology All India Institute of Medical SciencesBhubaneswar 751019OdishaIndia Department of Optometry Kar Vision Eye HospitalBhubaneswar 751013OdishaIndia Department of Statistics Apollo HospitalsChennai 823104India

BACKGROUND Knowledge about refractive stabilization and the accuracy of postoperative refractive error measurements are crucial for improved patient outcomes after *** guidelines typically recommend waiting 4-6 wk before prescribing corrective *** research focused on identifying factors that influence refractive errors in the early stages of post-cataract surgery,thus contributing to the existing literature on this *** To investigate the time required for refraction stability after uneventful phacoemulsification *** We compared the variation and statistical significance of the difference in spherical,cylindrical components,and the spherical equivalent between the 1-and 6-wk follow-up period in a group of 257 eyes that underwent uneventful phacoemulsification with foldable intraocular lens implantation,all performed by a single experienced *** Wilcoxon-Signed Rank Test was utilized to assess the magnitude of the change and determine its statistical *** refractive stability was defined as the point at which the change in spherical equivalent was within±0.5 dioptres for two consecutive *** The average age of the patients was 64.9±8.9 *** differences observed in both the visits in spherical power(0.1±0.2),cylinder power(0.3±0.4),and spherical equivalent(0.2±0.2)were minimal and not statistically *** majority of eyes(93.4%)achieved refractive stability within 6 wk after the *** cylindrical power differed between age groups at the 6th wk post-operative and the difference was statistically significant(P value 0.013).There were no significant differences in refractive stability when considering sex and axial *** Phacoemulsification with foldable intraocular lens implantation results in no significant changes in refraction for the majority of cases during the 6-wk follow-up ***,a spectacle prescription can be given at the completion of 1 wk.

关键词： Cataract surgery Phacoemulsification Refraction stability Visual acuity Spherical equivalent

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Production of chitosan from endolichenic fungi isolated from mangrove environment and its antagonistic activity

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Asian Pacific Journal of Tropical Biomedicine 2012年第2期2卷 140-143页

作者： logesh AR Thillaimaharani KA Sharmila K Kalaiselvam M Raffi SM Centre of Advanced Study in Marine Biology Faculty of Marine SciencesAnnamalai University

Objective:To screen the chitosan producing ability of endolichenic fungi and its antibacterial ***:Lichen collected from mangroves was screened for endophytes and the chitosan producing ability of endolichenic fungi by submerged fermentation was also *** activity was carried out against different ***:Totally4 different groups of fungi were isolated from the lichen Roccella *** the four genera,Aspergillus niger(***)is potential to produce chitosan(1.3 g/L)on the twelfth day of *** plays an important role in the pnjductivity of chitosan and the yield was maximum at 10%(1.93 g/L).Antibacterial activity revealed that Vibrio cholerae was sensitive to chitosan followed by Escherichia ***:In conclusion,our findings suggest that *** is a potential candidate to produce more chitosan than the other strains and glucose plays an important role in the production of chitosan which proves to have a good antibacterial activity.

关键词： Mangrove lichens Roccella montagnei Endolichenic fungi Chitosan

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基于Helmholtz方程最小二乘法声全息复杂结构振动噪声响应分析(英文)

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汽车工程学报 2011年第4期1卷 237-247页

作者： Sean F.Wu logesh Kumar Natarajan 韦恩州立大学机械工程系

论述了以车身模型为例的复杂结构声振响应的分析方法。分析的目的是为了识别对车内声场的声压有关键贡献的板件。为此,本文采用基于Helmholtz方程最小二乘法的近场声全息(NAH)技术,利用对任意形状的表面进行近场的声压测量结果对结构表... 详细信息

论述了以车身模型为例的复杂结构声振响应的分析方法。分析的目的是为了识别对车内声场的声压有关键贡献的板件。为此,本文采用基于Helmholtz方程最小二乘法的近场声全息(NAH)技术,利用对任意形状的表面进行近场的声压测量结果对结构表面的振动噪声响应进行重构。首先,对部件表面法向振动速度和表面的声压分布进行了重构,其次计算了部件表面声强分布以及每个部件的声功率流与车内任意一点声压的相关程度。每个部件对车内一点声压的相对贡献取决于板件到该点的声功率流。利用基于HELS近场声全息只需要进行一组声压测量就可以对板件的结构噪声进行分析,并且能够进行板件相对贡献量的研究。本文的分析结果得到了试验结果的证明,验证试验是在全消声室内进行的。

关键词： NAH HELS 声场重构

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