Fluorescent active ruthenium(ii) complex units containing bpy or phen or dmp ligands anchored on branched poly(ethylenimine): DNA binding and in vitro biological assessment

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31831-31839 ◽  
Author(s):  
Ilayaperumal Pradeep ◽  
Balagurusamy Balajothi ◽  
Sankaralingam Arunachalam ◽  
Rajakumar Dhivya ◽  
Annadurai Vinothkanna ◽  
...  
Keyword(s):  
Dna Binding ◽  
Uv Light ◽  
Ruthenium Complexes ◽  
Light Irradiation ◽  
Biological Assessment ◽  
Uv Light Irradiation

UV light irradiation visible responses of polymer ruthenium complexes.

Validation of a Novel Microscale Mold Patterning Protocol Based on Gelatin Methacrylate Photopolymerizable Hydrogels

2012 ◽  
Author(s):  
Paola Occhetta ◽  
Nasser Sadr ◽  
Francesco Piraino ◽  
Alberto Redaelli ◽  
Matteo Moretti ◽  
...  
Keyword(s):  
Uv Light ◽  
Three Dimensional ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Geometrical Features ◽  
3D Architecture ◽  
Pdms Replica ◽  
Size Scales

Native tissues are composed of functional three-dimensional (3D) units on the scale of 100–1000μm. The 3D architecture of these repeating units underlies the coordination of multicellular processes such as proliferation, differentiation, migration and apoptosis[1]. The requirement for 3D biomimetic matrices to mimic in vitro the ECM microarchitecture found in vivo becomes relevant in complex and vascularized tissue engineered models[2]. Among others, photopolymerizable hydrogels offer tunable geometrical features similar to the macromolecular-based components of soft ECM [3], can be crosslinked either in vivo or in vitro in the presence of a photoinitiator agent (PI) using visible or ultraviolet (UV) light irradiation, and have shown good compatibility with several protocols for cell embedding at different size-scales. In the present study, a new protocol to obtain cell-laden hydrogel micropatterns with highly controlled geometrical features is presented, based on the combination of polydimethylsiloxane (PDMS) replica molding and UV photopolimerization of methacrylate gelatin (GelMA).

scholarly journals Methods to disinfect and decontaminate SARS-CoV-2: a systematic review of in vitro studies

2021 ◽  
Vol 8 ◽  
pp. 204993612199854
Author(s):  
Chun Shing Kwok ◽  
Mustafa Dashti ◽  
Jacopo Tafuro ◽  
Mojtaba Nasiri ◽  
Elena-Andra Muntean ◽  
...  
Keyword(s):  
Systematic Review ◽  
Povidone Iodine ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Iodine Complex ◽  
Chemical Agents ◽  
Hand Wash ◽  
Different Types

Background: Cleaning is a major control component for outbreaks of infection. However, for the SARS-CoV-2 pandemic, there is limited specific guidance regarding the proper disinfection methods that should be used. Methods: We conducted a systematic review of the literature on cleaning, disinfection or decontamination methods in the prevention of SARS-CoV-2. Results: A total of 27 studies were included, reporting a variety of methods with which the effectiveness of interventions were assessed. Virus was inoculated onto different types of material including masks, nasopharyngeal swabs, serum, laboratory plates and simulated saliva, tears or nasal fluid and then interventions were applied in an attempt to eliminate the virus including chemical, ultraviolet (UV) light irradiation, and heat and humidity. At body temperature (37°C) there is evidence that the virus will not be detectable after 2 days but this can be reduced to non-detection at 30 min at 56°C, 15 min at 65°C and 2 min at 98°C. Different experimental methods testing UV light have shown that it can inactivate the virus. Light of 254–365 nm has been used, including simulated sunlight. Many chemical agents including bleach, hand sanitiser, hand wash, soap, ethanol, isopropanol, guandinium thiocynate/t-octylphenoxypolyethoxyethanol, formaldehyde, povidone-iodine, 0.05% chlorhexidine, 0.1% benzalkonium chloride, acidic electrolysed water, Clyraguard copper iodine complex and hydrogen peroxide vapour have been shown to disinfect SARS-CoV-2. Conclusions: Heating, UV light irradiation and chemicals can be used to inactivate SARS-CoV-2 but there is insufficient evidence to support one measure over others in clinical practice.

In Vitro Bioactivity and Bacteriostasis Effect of Thermally Treated and UV-Light Irradiated TiO2 Ceramics

2016 ◽  
Vol 674 ◽  
pp. 121-126 ◽  
Author(s):  
Inga Narkevica ◽  
Aigars Reinis ◽  
Lauma Bugovecka ◽  
Ingus Skadins ◽  
Errj Sansonetti ◽  
...  
Keyword(s):  
Bone Repair ◽  
Uv Light ◽  
Immunological Response ◽  
Light Irradiation ◽  
Biomedical Implant ◽  
Uv Light Irradiation ◽  
Bacteria Adhesion ◽  
Lower Temperature ◽  
Thermally Treated

Biomaterials used in bone repair must satisfy certain criteria in order to perform without undesirable immunological response. They must be biocompatible and should inhibit bacteria adhesion on the surface, that could led to strong inflammatory process and implant failure. Our study reveals a synergistic effect on bioactivity and bacteriostasis effect of the TiO2 ceramics with different surface properties and provides insight into the design of better biomedical implant surfaces. The results show that UV light irradiation has great impact on hidrophilicity of TiO2 ceramics, but little effect on the sample bacteriostatic effect and bioactivity. TiO2 ceramic samples showed no or very low bacterial adhesion. Nevertheless, in vitro bioactivity showed TiO2 ceramic that was thermally treated at lower temperature. Thus for bone repair it’s suggested to use TiO2 ceramic sintered at lower temperature in order to provide bioactivity with bacterostatic effect and use UV-light irradiation to improve hidrophilicity.

Controlled nitric oxide photo-release from nitro ruthenium complexes: The vasodilator response produced by UV light irradiation

2005 ◽  
Vol 358 (9) ◽  
pp. 2643-2650 ◽  
Author(s):  
Renata Galvão de Lima ◽  
Marília Gama Sauaia ◽  
Daniella Bonaventura ◽  
Antonio Cláudio Tedesco ◽  
Renata Fonseca Vianna Lopez ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Uv Light ◽  
Ruthenium Complexes ◽  
Light Irradiation ◽  
Vasodilator Response ◽  
Uv Light Irradiation

scholarly journals TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1622
Author(s):  
Xiao-Pin Guo ◽  
Peng Zang ◽  
Yong-Mei Li ◽  
Dong-Su Bi
Keyword(s):  
Activated Carbon ◽  
Natural Organic Matter ◽  
Uv Light ◽  
Sol Gel ◽  
Light Irradiation ◽  
Nano Tio2 ◽  
Uv Light Irradiation ◽  
Adsorption Capacities ◽  
Taste And Odor ◽  
Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

Photocatalytic performance of Cu-doped titania thin films under UV light irradiation

2021 ◽  
Vol 553 ◽  
pp. 149535
Author(s):  
Elisa Moretti ◽  
Elti Cattaruzza ◽  
Cristina Flora ◽  
Aldo Talon ◽  
Eugenio Casini ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Doped Titania

Amino acid-templated zinc phosphites: low-dimensional structures, fluorescence, and nonlinear optical properties

2021 ◽  
Author(s):  
Yumei Mao ◽  
Xuehua Dong ◽  
Yuandan Deng ◽  
Jing Li ◽  
Ling Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Amino Acid ◽  
Nonlinear Optical ◽  
Uv Light ◽  
Nonlinear Optical Properties ◽  
Light Irradiation ◽  
Blue Fluorescence ◽  
Structure Directing Agent ◽  
Uv Light Irradiation ◽  
Low Dimensional

Two new zinc phosphites were prepared using the amino acid alanine as structure-directing agent. They have tubular and ladder-like structures exhibiting blue fluorescence upon UV light irradiation. Notably, the tubular...

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