Activation of oxygen

In this work, we have shown that the addition of Zn to nanocrystalline nickel ferrite enhanced its H2 sensing properties, such as sensitivity, response time, and stability. This is explained due to the formation of defects and oxygen vacancies in the crystal structure due to the substitution of Zn ions in place of Ni ions. These defects generated more active sites for H2 gas to interact with, resulting in improved sensing performance.

9p viambani 18-06-2024 1 1   Download

In this study, green-synthesized zinc oxide nanoparticles (ZnO NPs) were surface-modified with pluronic F-127 after being synthesized using the leaf extract of guava (Psidium guajava). The resulting material, ZnO@F-127, was then characterized, and its anticancer activity was evaluated on several cell lines.

8p viambani 18-06-2024 3 1   Download

This research investigates the effect of cobalt precursor and calcination time on the morphology and catalytic activity of Co3O4 films in the oxygen evolution reaction (OER). Co3O4 films with porous flower-like nanostructures were obtained using cobalt nitrate as a cobalt precursor, while cobalt chlorides were used to produce porous nanoneedle structures Co3O4 film.

12p dianmotminh02 03-05-2024 3 1   Download

Isaria cicadae, currently identified as Paecilomyces cicadae (Miq.) Samson (Cordycipitaceae, Hypocreales, Ascomycetes), is a parasitic fungus on cicadas and is considered a folk medicine in traditional medicine. In this research, the antioxidant activity of some extracts from the biomass and fruit bodies of Isaria cicadae F0004 isolated in Vietnam was investigated.

13p dianmotminh02 03-05-2024 4 1   Download

In this study, a simple technique combining conventional electrospinning and facile gas–solid reaction for fabricating PAN/Ag2S nanofibers was presented and tested. The obtained fibers would have excellent properties such as the flexibility of PAN nanofibers and efficient photocatalysis of the Ag2S nanoshells under visible light. The photocatalytic elimination of RhB in water was used to evaluate the activity and application of the synthesized material under visible light irradiation.

11p dianmotminh02 03-05-2024 4 2   Download

Ebook "Advanced electrocatalysts for low-temperature fuel cells" introduces the reader to the state of the art in nanostructured anode and cathode electrocatalysts for low-temperature acid and alkaline fuel cells. It explores the electrocatalysis of anode (oxidation of organic molecules) and cathode (oxygen reduction) reactions. It also offers insights into metal-carbon interactions, correlating them with the catalytic activity of the electrochemical reactions.

318p tracanhphuonghoa1007 22-04-2024 4 2   Download

Part 2 book "Study guide for fundamentals of nursing the art and science of nursing care" includes content: Hygiene, skin integrity and wound care, activity, rest and sleep, comfort, nutrition, urinary elimination, bowel elimination, oxygenation, fluid, electrolyte and acid–base balance, self concept, stress and adaptation, loss, grief, and dying, sensory functioning, sexuality, spirituality.

239p muasambanhan10 06-04-2024 6 1   Download

Ebook "Electrochemistry of N4 macrocyclic metal complexes - Volume 1: Energy (Second edition)" describes the state of the art regarding molecular catalysts such as MN4 metal complexes, like porphyrins and phthalocyanines. This volume focuses on the particular case of the electrocatalysis of the reduction of O2 for practical applications in fuel cells and air batteries. Indeed, active and stable materials have been developed in the last 5 years where MN4 catalytic systems can be obtained by the pyrolysis of starting materials that do not necessarily involve MN4 complexes.

325p tudohanhtau1006 29-03-2024 2 2   Download

Ebook "Total synthesis of plakortide E and biomimetic synthesis of plakortone B" subsequently converts Plakortide E methyl ester to plakortone B in a biomimetic conversion. Construction and functionalization of cyclic peroxides are notoriously difficult due to the very low O-O bond dissociation energy. Plaktoride E is isolated from the Jamaican marine sponge platorits halichondrioides and contains a five-membered peroxide ring, with oxygen atoms linked to tertiary C4 and C6 centers.

232p nhanphanguyet 28-01-2024 5 2   Download

Ebook "Handbook of gas sensor materials: Properties, advantages and shortcomings for applications (Volume 1: Conventional approaches)" provide a detailed and comprehensive account of materials for gas sensors, including the properties and relative advantages of various materials. Since these sensors can be applied for the automation of myriad industrial processes, as well as for everyday monitoring of such activities as public safety, engine performance, medical therapeutics, and in many other situations, this handbook is of great value.

454p nhanphanguyet 28-01-2024 5 2   Download

The graphene oxide (GO) loaded spiky gold (AuNS) nanocomposites were prepared by electrostatic interaction between negatively-charged GO nanosheets and positively-charged AuNS by the assistance of chitosan as linker molecules. The AuNS/GO nanocomposites exhibit a red-shift in the extinction spectra and a reduction in the zeta potential compared to those of the pristine AuNS due to the presence of oxygen-containing functional groups in GO.

7p vimichaelfaraday 28-12-2023 5 3   Download

The aim of this research was to evaluate the role of exogenous MT on ROS production, cell membrane damage and antioxidant enzyme activity of avocado during ripening. This result will help to better understand the mechanism of MT action in different fruits.

10p vimulcahy 18-09-2023 7 3   Download

Tamarind (Tamarindus indica) has long been known for its high nutrition content and pharmacological potential. However, there is lack of studies on the content of antioxidants, phenolic and flavonoid contents of tamarind seed grown in Vietnam.

13p vimulcahy 18-09-2023 7 3   Download

There has been significant interest in designing heterostructured nanoparticles with excellent synergistic properties and multifunctionality. Herein, this work reports on the design of reactive oxygen species- (ROS-) responsive Ag decorated TiO2 hybrid nanorods (HNRs) with dual functionalities of enhanced photodynamic therapy and antibacterial activity.

9p viberbers 09-08-2023 12 3   Download

Cu-Mn hopcalite, as a conventional catalyst showing potential in many chemical reactions, has been rarely researched for its applications in H2O2-activated Fenton-like reactions for the decomposition of refractory pollutants.

11p viberbers 09-08-2023 6 2   Download

A green sol-gel method was employed to synthesize TiO2 nanoparticles (NPs) using titanium metal. The synthesized TiO2 NPs underwent comprehensive characterization using techniques including X-ray diffraction (XRD), infrared spectroscopy (IR), transmission electron microscopy (TEM), and UV–Vis diffuse reflectance spectroscopy (UV-Vis DRS) to evaluate their structure, morphology, and spectral properties.

9p viwolverine 07-07-2023 5 2   Download

In addition, the superoxo species of AA13 has structural parameters halfway between those in AA9 and AA10 PMOs. The structural relationship between the active site and intermediates of AA13 with AA9 and AA10 PMOs is also consistent with their evolutionary relationship.

4p vimalfoy 08-02-2023 4 2   Download

In this study, the removal of DMDS was investigated by adsorption on activated carbon cloth (ACC) in the gas phase. Kinetics and isotherm studies were performed. Adsorption kinetics followed by GC-MS and the data were processed using different models. When correlation coefficients (R2 ) of linear regression analysis are analyzed, it is seen that the concordance of experimental data to the pseudo-second-order equation is quite good.

10p lyhuyenthu 31-01-2023 8 2   Download

The working mechanism of the chemotherapeutic drug doxorubicin, which is frequently used in cancer treatment, its effects on cell metabolism, and pathways activated solely by doxorubicin are not fully known. Understanding these principles is important both in improving existing therapies and in finding new drug targets. Here, I describe a systems-biology approach to find a generalizable working principle for doxorubicin by superimposition of human interactome over gene datasets commonly expressed among various cancer types.

13p lyhuyenthu 31-01-2023 7 2   Download

The production of a chitin-like exopolysaccharide (EPS) was optimized through experimental design methods, evaluating the influence of urea, phosphate, and glucose. Under optimized conditions, up to 1.51 g/L was produced and its physicochemical characteristics were evaluated by chromatography, NMR, and FTIR spectroscopy, and rheological techniques.

10p viginny 30-12-2022 10 2   Download