scholarly journals Eco-friendly synthesis of chromeno[4,3-b]chromenes with a new photosensitized WO3/ZnO@NH2-EY nanocatalyst

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 18026-18039
Author(s):  
Zahra Jalili ◽  
Reza Tayebee ◽  
Farrokhzad M. Zonoz
Keyword(s):  
Reactive Species ◽  
Green Led

WO3/ZnO@NH2-EY is disclosed in the preparation of chromenes under air in the presence of a green LED. ˙O2−, OH˙, and h+ are proposed as reactive species and hot filtration test assured stability and reusability of the nanocatalyst.

scholarly journals One-pot multicomponent green LED photoinduced synthesis of chromeno[4,3-b]chromenes catalyzed by a new nanophotocatalyst histaminium tetrachlorozincate

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19723-19736
Author(s):  
Mahbube Jarrahi ◽  
Reza Tayebee ◽  
Behrooz Maleki ◽  
Alireza Salimi
Keyword(s):  
Reactive Species ◽  
Good Stability ◽  
One Pot ◽  
Green Led ◽  
Photoinduced Synthesis

(His.)ZnCl4 nanocatalyst is realized for the preparation of chromenes with a green LED. ˙O2−, OH˙ and h+ are reactive species for this reaction. Complementary tests assured good stability and reusability of the nanophotocatalyst.

Heat Transfer in a Ferromagnetic Chemically Reactive Species

2020 ◽  
pp. 1-9
Author(s):  
Hassan Tahir ◽  
Umair Khan ◽  
Anwarud Din ◽  
Yu-Ming Chu ◽  
Noor Muhammad
Keyword(s):  
Heat Transfer ◽  
Reactive Species ◽  
Chemically Reactive Species

scholarly journals Development of an electrochemical sensor for in-situ monitoring of reactive species produced by cold physical plasma

2021 ◽  
Vol 326 ◽  
pp. 129007
Author(s):  
Zahra Nasri ◽  
Giuliana Bruno ◽  
Sander Bekeschus ◽  
Klaus-Dieter Weltmann ◽  
Thomas von Woedtke ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Reactive Species ◽  
In Situ Monitoring ◽  
Physical Plasma

scholarly journals The Role of the Reactive Species Involved in the Photocatalytic Degradation of HDPE Microplastics Using C,N-TiO2 Powders

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 999 ◽  
Author(s):  
Aranza Denisse Vital-Grappin ◽  
Maria Camila Ariza-Tarazona ◽  
Valeria Montserrat Luna-Hernández ◽  
Juan Francisco Villarreal-Chiu ◽  
Juan Manuel Hernández-López ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Reaction System ◽  
Terrestrial Ecosystems ◽  
Degradation Process ◽  
Reactive Species ◽  
Hazardous Substances ◽  
Wide Range ◽  
Degradation Behaviors ◽  
Environmentally Friendly Process

Microplastics (MPs) are distributed in a wide range of aquatic and terrestrial ecosystems throughout the planet. They are known to adsorb hazardous substances and can transfer them across the trophic web. To eliminate MPs pollution in an environmentally friendly process, we propose using a photocatalytic process that can easily be implemented in wastewater treatment plants (WWTPs). As photocatalysis involves the formation of reactive species such as holes (h+), electrons (e−), hydroxyl (OH●), and superoxide ion (O2●−) radicals, it is imperative to determine the role of those species in the degradation process to design an effective photocatalytic system. However, for MPs, this information is limited in the literature. Therefore, we present such reactive species’ role in the degradation of high-density polyethylene (HDPE) MPs using C,N-TiO2. Tert-butanol, isopropyl alcohol (IPA), Tiron, and Cu(NO3)2 were confirmed as adequate OH●, h+, O2●− and e− scavengers. These results revealed for the first time that the formation of free OH● through the pathways involving the photogenerated e− plays an essential role in the MPs’ degradation. Furthermore, the degradation behaviors observed when h+ and O2●− were removed from the reaction system suggest that these species can also perform the initiating step of degradation.

Relevance of mitochondrial dysfunction during Sorafenib-induced cell death in liver cancer cells. Role of oxidative and nitrogen reactive species

2021 ◽  
Vol 165 ◽  
pp. 54
Author(s):  
Patricia de la Cruz-Ojeda ◽  
M. Ángeles Rodríguez-Hernández ◽  
Elena Navarro-Villarán ◽  
Paloma Gallego ◽  
Pavla Staňková ◽  
...  
Keyword(s):  
Cell Death ◽  
Liver Cancer ◽  
Mitochondrial Dysfunction ◽  
Cancer Cells ◽  
Reactive Species ◽  
Liver Cancer Cells ◽  
Nitrogen Reactive Species

Non-thermal pulsed plasma activated water: environmentally friendly way for efficient surface modification of semiconductor nanoparticles

2021 ◽  
Author(s):  
Pavel Galář ◽  
Josef Khun ◽  
Anna Fučíková ◽  
Kateřina Dohnalová ◽  
Tomáš Popelář ◽  
...  
Keyword(s):  
Surface Modification ◽  
Free Surface ◽  
Thermal Plasma ◽  
Environmentally Friendly ◽  
Semiconductor Nanoparticles ◽  
Reactive Species ◽  
Pulsed Plasma ◽  
Non Thermal Plasma ◽  
Plasma Activated Water

Non-thermal plasma activated water can be used for cheap, easy and chemicals-free surface modification of nanoparticles, with all the reactive species originating solely in air and water.

Ketoprofen degradation by surface reactive species on TiO2, AgxOy/MoxOy/catalysts

2021 ◽  
pp. 129687
Author(s):  
Andrés Suárez-Escobar ◽  
Vicente Rodríguez-González ◽  
Carlos Gallardo-Vega ◽  
Edwin Sarria ◽  
Lorena Clavijo
Keyword(s):  
Reactive Species

Structire, Properties, and Process Characteristics of Low-K Materials Prepared by PECVD

1999 ◽  
Vol 565 ◽  
Author(s):  
Y. Shimogaki ◽  
S. W. Lim ◽  
E. G. Loh ◽  
Y. Nakano ◽  
K. Tada ◽  
...  
Keyword(s):  
Growth Rate ◽  
Dielectric Constant ◽  
Gas Flow ◽  
Structural Changes ◽  
Silicon Oxide ◽  
Reactive Species ◽  
Low Dielectric Constant ◽  
Low Dielectric ◽  
Step Coverage ◽  
Low K

AbstractLow dielectric constant F-doped silicon oxide films (SiO:F) can be prepared by adding fluorine source, like as CF4 to the conventional PECVD processes. We could obtain SiO:F films with dielectric constant as low as 2.6 from the reaction mixture of SiH4/N2 O/CF4. The structural changes of the oxides were sensitively detected by Raman spectroscopy. The three-fold ring and network structure of the silicon oxides were selectively decreased by adding fluorine into the film. These structural changes contribute to the decrease ionic polarization of the film, but it was not the major factor for the low dielectric constant. The addition of fluorine was very effective to eliminate the Si-OH in the film and the disappearance of the Si-OH was the key factor to obtain low dielectric constant. A kinetic analysis of the process was also performed to investigate the reaction mechanism. We focused on the effect of gas flow rate, i.e. the residence time of the precursors in the reactor, on growth rate and step coverage of SiO:F films. It revealed that there exists two species to form SiO:F films. One is the reactive species which contributes to increase the growth rate and the other one is the less reactive species which contributes to have uniform step coverage. The same approach was made on the PECVD process to produce low-k C:F films from C2F4, and we found ionic species is the main precursor to form C:F films.

scholarly journals Metronomic photodynamic therapy using an implantable LED device and orally administered 5-aminolevulinic acid

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Izumi Kirino ◽  
Katsuhiko Fujita ◽  
Kei Sakanoue ◽  
Rin Sugita ◽  
Kento Yamagishi ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Aminolevulinic Acid ◽  
Antitumor Effects ◽  
Continuous Irradiation ◽  
Cancer Cell Death ◽  
Long Duration ◽  
Green Led ◽  
Repeated Administrations ◽  
532 Nm ◽  
Patient Burden

AbstractMetronomic photodynamic therapy (mPDT) is a form of PDT that induces cancer cell death by intermittent continuous irradiation with a relatively weak power of light for a long duration (several days). We previously developed a wirelessly powered, fully implantable LED device and reported a significant anti-tumor effect of mPDT. Considering application in clinical practice, the method used for repeated administrations of photosensitizers required for mPDT should not have a high patient burden such as the burden of transvenous administration. Therefore, in this study, we selected 5-aminolevulinic acid (ALA), which can be administered orally, as a photosensitizer, and we studied the antitumor effects of mPDT. In mice with intradermal tumors that were orally administered ALA (200 mg/kg daily for 5 days), the tumor in each mouse was simultaneously irradiated (8 h/day for 5 days) using a wirelessly powered implantable green LED device (532 nm, 0.05 mW). Tumor growth in the mPDT-treated mice was suppressed by about half compared to that in untreated mice. The results showed that mPDT using the wirelessly powered implantable LED device exerted an antitumor effect even with the use of orally administered ALA, and this treatment scheme can reduce the burden of photosensitizer administration for a patient.

scholarly journals Reactive species driven oxidative modifications of peptides—Tracing physical plasma liquid chemistry

2021 ◽  
Vol 129 (19) ◽  
pp. 193305
Author(s):  
Sebastian Wenske ◽  
Jan-Wilm Lackmann ◽  
Larissa Milena Busch ◽  
Sander Bekeschus ◽  
Thomas von Woedtke ◽  
...  
Keyword(s):  
Reactive Species ◽  
Oxidative Modifications ◽  
Physical Plasma
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