Results 51 to 60 of about 17,416 (268)

Sublethal Photodynamic Treatment Does Not Lead to Development of Resistance

Frontiers in Microbiology, 2018
A promising new alternative approach for eradication of antibiotic-resistant strains is to expose microbes to photosensitizers, which upon illumination generate reactive oxygen species.
Rawan Al-Mutairi, Artak Tovmasyan, Ines Batinic-Haberle, Ludmil Benov   +3 more
doaj   +1 more source

New "light" for one-world approach toward safe and effective control of animal diseases and insect vectors from leishmaniac perspectives [PDF]

, 2016
Light is known to excite photosensitizers (PS) to produce cytotoxic reactive oxygen species (ROS) in the presence of oxygen. This modality is attractive for designing control measures against animal diseases and pests. Many PS have a proven safety record.
Barrè C, Batchu RB, Chang KP, Chen HW, Chow LC, de Oliveira C, Elliott RD, Fan CK, Head J, Hung CH, Ji DD, Kolli BK, Lun ZR, MANNA, LAURA, Matsumoto Y, Melo S, Ng DKP, Ozbel Y, Reinolds J, Sanijoba C, Shiao SH, Shih NY, Tsai CW, Vicente MG, Volf P, Wu YL, Yu CL, Zhou X.N., Özbilgin A   +28 more
core   +1 more source

Absence of a dose-rate effect in the transformation of C3H 10T1/2 cells by α-particles [PDF]

, 1987
The findings of Hill et al. (1984) on the greatly enhanced transformation frequencies at very low dose rates of fission neutrons induced us to perform an analogous study with -particles at comparable dose rates. Transformation frequencies were determined
Balcer-Kubiczek E.K., Barendsen G.W, Barendsen G.W., Borek C., Burch P.R.J., Elkind M.M., Hall E.J., Han A., Han A., Hill C.K., Hill C.K., Hill C.K., Lloyd E.L., Miller R.C., Miller R.C., Reznikoff C., Robertson J.B., Roos H., Rossi H.H., Terzaghi M., Yang T.   +20 more
core   +1 more source

Modulating Two‐Photon Absorption in a Pyrene‐Based MOF Series: An In‐Depth Investigation of Structure–Property Relationships

Advanced Functional Materials, EarlyView.
This study investigates H4TBAPy‐based metal–organic frameworks (MOFs) ‐ NU‐1000, NU‐901, SrTBAPy, and BaTBAPy ‐ for multiphoton absorption (MPA) performance. It observes topology‐dependent variations in the 2PA cross‐section, with BaTBAPy exhibiting the highest activity.
Simon N. Deger, Helmy Pacheco Hernandez, Yang Cui, Hongxing Hao, Vanessa Ramm, David C. Mayer, Khai‐Nghi Truong, Roland A. Fischer, Jürgen Hauer, Mariana Kozlowska, Alexander Pöthig   +10 more
wiley   +1 more source

Photodynamic effectiveness of laser diode combined with ozone to reduce STaphylicoccus aureus biofilm with exogenous chlorophyll of Dracaena angustifolia leaves

Biomedical Photonics, 2019
Photodynamic inactivation is an effective treatment that uses light irradiation, photosensitizer and oxygen. The aim of this study was to determine photodynamic effectiveness of laser diode combined with ozone to reduce Staphylococcus aureus biofilm ...
S. D. Astuti, N. D. Drantantiyas, A. P. Putra, P. S. Puspita, A. Syahrom, S. Suhariningsih   +5 more
doaj   +1 more source

Photodynamic inactivation of Candida albicans with imidazoacridinones : influence of irradiance, photosensitizer uptake and reactive oxygen species generation [PDF]

, 2015
The increasing applicability of antifungal treatments, the limited range of available drug classes and the emergence of drug resistance in Candida spp. suggest the need for new treatment options. To explore the applicability of C.
Bielawski, Krzysztof P., Nakonieczna, Joanna, Sarna, Tadeusz, Szewczyk, Grzegorz, Taraszkiewicz, Aleksandra   +4 more
core   +3 more sources

Nanodiamond Quantum Sensors for Probing Free Radical Biology

Advanced Functional Materials, EarlyView.
Free radicals play key roles in cellular signaling and disease but remain difficult to measure in living systems. Nanodiamonds (NDs) with nitrogen‐vacancy (NV) centers enable quantum sensing of local magnetic noise via T₁ relaxometry, providing nondestructive radical detection in living cells.
Qi Lu, Yingke Wu, Tanja Weil
wiley   +1 more source

Efficacy of Pulsed 405-nm LEDs for antimicrobial photodynamic inactivation : effects of intensity, frequency, and duty cycle [PDF]

, 2016
Objective: This study investigates possible advantages in pulsed over continuous 405-nm LED-light for bacterial inactivation and energy efficiency.
Gillespie, Jonathan B., Given, Martin J., Judd, Martin D., MacGregor, Scott J., MacLean, Michelle, Timoshkin, Igor V., Wilson, Mark P.   +6 more
core   +1 more source

Photodynamic inactivation of oropharyngeal Candida strains

Phytomedicine, 2014
Oropharyngeal candidiasis (OPC) is an infection frequent in immunocompromised patients. Photodynamic therapy is an alternative to conventional treatments, based on the utilization of compounds that inhibit or kill microorganisms only under the effect of light, process known as Photodynamic Inactivation (PDI).
Postigo, Agustina, Bulacio, Lucía, Sortino, Maximiliano Andrés   +2 more
openaire   +3 more sources

Airborne 1O2 Delivery via a Superhydrophobic Dressing as a Pathway to Next‐Generation Wound Therapies, an in Vivo Murine Burn Model Study

Advanced Healthcare Materials, EarlyView.
Schematic illustration of the SH bandage placed on an infected burn wound and its role in wound healing. A superhydrophobic PDMS membrane coated with the PS verteporfin is placed over the wound area and illuminated with a red laser at 690 nm, generating airborne 1O2 above the tissue.
Fernanda Viana Cabral, QianFeng Xu, Natalie Eidenschink, Pareesha Haresh, Alessandra Nara de Souza Rastelli, Jeremy Goverman, Alexander Greer, Alan M. Lyons, Tayyaba Hasan   +8 more
wiley   +1 more source