VUV-photon Induced Formation of Hydrophilic and Hydrophobic Micro Domains Structure on Intraocular Lens Surface for Blocking after Cataract

ABSTRACTA micro domain structure, which hydrophilic and hydrophobic groups were arrayed alternately, was formed on the surface of an intraocular lens [IOL] by using ultra violet rays [VUV]. With this technique, the IOL that is free from fibrin has been developed. In order to substitute the hydrophilic groups in matrix-form on the surface, an ArF laser light was then irradiated on the hydrophobic surface in the presence of water for the −OH groups, through the 50-micrometer dot-patterned reticle. With this selective photochemical surface modification, the hydrophilic and hydrophobic groups were arrayed alternately on the sample surface. The modified IOL was soaked in 0.1-wt % fibrin solutions, and the fibrin-sticking rate was measured by using an infrared spectroscopy [FT-IR]. It results that the absorption coefficient of amide band reached to 0.0006, decreasing to one-six of non-treatment sample's.

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Drug Eluting Intraocular Lens Surface Modification for PCO Prevention

Colloids and Interface Science Communications ◽

10.1016/j.colcom.2018.03.007 ◽

2018 ◽

Vol 24 ◽

pp. 40-44 ◽

Cited By ~ 6

Author(s):

Yuemei Han ◽

Xu Xu ◽

Yuqin Wang ◽

Sihao Liu ◽

Xia Zhao ◽

...

Keyword(s):

Surface Modification ◽

Intraocular Lens ◽

Drug Eluting ◽

Lens Surface

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Centrifugally concentric ring-patterned drug-loaded polymeric coating as an intraocular lens surface modification for efficient prevention of posterior capsular opacification

Acta Biomaterialia ◽

10.1016/j.actbio.2021.11.018 ◽

2021 ◽

Author(s):

Duoduo Lu ◽

Yuemei Han ◽

Dong Liu ◽

Siqi Chen ◽

Jiqiao Qie ◽

...

Keyword(s):

Surface Modification ◽

Intraocular Lens ◽

Polymeric Coating ◽

Posterior Capsular Opacification ◽

Concentric Ring ◽

Lens Surface

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Facile multifunctional IOL surface modification via poly(PEGMA-co-GMA) grafting for posterior capsular opacification inhibition

RSC Advances ◽

10.1039/d1ra00201e ◽

2021 ◽

Vol 11 (17) ◽

pp. 9840-9848

Author(s):

Jiayi Xia ◽

Duoduo Lu ◽

Yuemei Han ◽

Jiahao Wang ◽

Yueze Hong ◽

...

Keyword(s):

Surface Modification ◽

Intraocular Lens ◽

Surface Coating ◽

Posterior Capsular Opacification ◽

Drug Eluting ◽

Lens Surface

Drug eluting and hydrophilic intraocular lens surface coating was facilely fabricated via poly(PEGMA-co-GMA) grafting. Such a multifunctional coating reduced posterior capsular opacification incidence after implantation effectively.

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Milk acetone determination by the photometrical method after microdiffusion and via FT infra-red spectroscopy

Journal of Agrobiology ◽

10.2478/v10146-011-0004-9 ◽

2011 ◽

Vol 28 (1) ◽

pp. 33-48 ◽

Cited By ~ 5

Author(s):

Oto Hanuš ◽

Václava Genčurová ◽

Yunhai Zhang ◽

Pavel Hering ◽

Jaroslav Kopecký ◽

...

Keyword(s):

Infrared Spectroscopy ◽

Indirect Method ◽

Geometric Mean ◽

Mid Infrared ◽

Subclinical Ketosis ◽

Infra Red ◽

Variation Range ◽

Ft Ir ◽

Infrared Method ◽

Photometrical Method

Milk acetone determination by the photometrical method after microdiffusion and via FT infra-red spectroscopyMilk acetone (AC) and betahydroxybutyrate (BHB) are important indicators of the energy metabolism of cows (ketosis occurrence) and an effective method for their determination, with reliable results, is of great importance. The goal of this work was to investigate the infrared method MIR-FT in terms of its calibration for milk AC and to develop a usable procedure. The microdiffusion photometric (485 nm; Spekol 11) method was used with salicylaldehyde as a reference (Re) and mid infrared spectroscopy FT (MIR-FT: Lactoscope FT-IR, Delta; MilkoScan FT 6000, M-Sc) as an indirect method. The acetone addition to milk had no recovery using MIR-FT (Delta). The reference AC set must have acceptable statistics for good MIR-FT calibration (M-Sc) and they were: 10.1 ± 9.74 at a geometric mean of 7.26 mg l-1, and a variation range from 1.98 to 33.66 mg l-1. The AC correlation between Re and MIR-FT (Delta) was low at 0.32 (P>0.05 but the Log AC relationship between Re and MIR-FT (M-Sc) was markedly better at 0.80 (P<0.01). The conversion of >10 mg l-1 as an AC subclinical ketosis limit could be > -0.80 (feedback 0.158 mmol l-1 = 9.25 mg l-1) and > -1.66. This could be important for ketosis monitoring (using M-Sc).

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A Facile Urea-Assisted Thermal Decomposition Process of TiO2 Nanoparticles and Their Photocatalytic Activity

Coatings ◽

10.3390/coatings11020165 ◽

2021 ◽

Vol 11 (2) ◽

pp. 165

Author(s):

Sandip Madhukar Deshmukh ◽

Mohaseen S. Tamboli ◽

Hamid Shaikh ◽

Santosh B. Babar ◽

Dipak P. Hiwarale ◽

...

Keyword(s):

Thermal Decomposition ◽

Photocatalytic Activity ◽

Tio2 Nanoparticles ◽

Large Scale ◽

Ultra Violet ◽

Tio2 Nps ◽

Transmission Electron ◽

Structures And Properties ◽

Ft Ir ◽

Large Scale Synthesis

In the present work, we have reported a facile and large-scale synthesis of TiO2 nanoparticles (NPs) through urea-assisted thermal decomposition of titanium oxysulphate. We have successfully synthesized TiO2 NPs by using this effective route with different weight ratios of titanium oxysulphate: urea. The structures and properties of TiO2 NPs were confirmed by scanning electron microscope) (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), ultra violet–visible spectroscopy (UV-vis), and photoluminescence (Pl) techniques. XRD demonstrated that TiO2 NPs holds of anatase crystal phase with crystallizing size 14–19 nm even after heating at 600 °C. TGA, SEM, and TEM images reveal urea’s role, which controls the size, morphology, and aggregation of TiO2 NPs during the thermal decomposition. These TiO2 NPs were employed for photodegradation of Methyl Orange (MO) in the presence of ultraviolet (UV) radiation. An interesting find was that the TiO2 NPs exhibited better photocatalytic activity and excellent recycling stability over several photodegradation cycles. Furthermore, the present method has a great perspective to be used as an efficient method for large-scale synthesis of TiO2 NPs.

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Quantification and Classification of Diclofenac Sodium Content in Dispersed Commercially Available Tablets by Attenuated Total Reflection Infrared Spectroscopy and Multivariate Data Analysis

Pharmaceuticals ◽

10.3390/ph14050440 ◽

2021 ◽

Vol 14 (5) ◽

pp. 440

Author(s):

Eirini Siozou ◽

Vasilios Sakkas ◽

Nikolaos Kourkoumelis

Keyword(s):

Infrared Spectroscopy ◽

Low Cost ◽

Diclofenac Sodium ◽

Reference Method ◽

Sodium Content ◽

Attenuated Total Reflection ◽

Accuracy And Precision ◽

Significant Difference ◽

Ft Ir

A new methodology, based on Fourier transform infrared spectroscopy equipped with an attenuated total reflectance accessory (ATR FT-IR), was developed for the determination of diclofenac sodium (DS) in dispersed commercially available tablets using chemometric tools such as partial least squares (PLS) coupled with discriminant analysis (PLS-DA). The results of PLS-DA depicted a perfect classification of the tablets into three different groups based on their DS concentrations, while the developed model with PLS had a sufficiently low root mean square error (RMSE) for the prediction of the samples’ concentration (~5%) and therefore can be practically used for any tablet with an unknown concentration of DS. Comparison with ultraviolet/visible (UV/Vis) spectrophotometry as the reference method revealed no significant difference between the two methods. The proposed methodology exhibited satisfactory results in terms of both accuracy and precision while being rapid, simple and of low cost.

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