Articles Related to oxidation

Background: The smell in a hospital is an amalgam of smells, emanating from varied sources. But primarily the smell is from the strong cleaning agents used in corridors, including phenyl and bleaching powder, etc. Chemicals that trigger odors may cause health effects. A strong urine odor is also responsible for foul smells in hospitals and other public facilities. Strong odors may cause some people to feel a burning sensation, leading to coughing, wheezing, or other breathing problems.

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Low temperature (but above-freezing) during germination and early seedling growth of chilling-sensitive crop is one of the most significant limiting factors in the productivity. 2,4-Epibrassinolide (24-EB) is one of the most active forms of brassinosteroids are multifunctional plant hormones that can regulate development and respond to abiotic stresses. The effect of seed-pretreatment with 24-EB (12.5 μg/L) on photosynthetic characteristics, membrane permeability, lipid peroxidation and antioxidant activities under chilling stress were investigated in tomato (Lycopersicon esculentum Mill.) cultivars: Kulon (early ripening) and Yakhont (mid-early). Results showed that the use of 24-EB led to more pronounced changes in the pigment composition in Yakhont in the absence of a stress factor, whereas in Kulon under chilling stress (2 o C for 24 h). 24-EB pretreatment minimized the damage to cell membranes in tomato plants caused by chilling stress. The tolerance to chilling stress in Yakhont was higher than Kulon (by electrolyte leakage and content of malondialdehyde assay). Under these conditions, oxidative processes in plants of Yakhont did not show significant difference. We have not established the effect of 24-EB on the level of low molecular weight antioxidants in tomato cultivars (measured by inhibition of 2,2-diphenyl-1-picrylhydrazyl free radical method). The antioxidant activity of leaf extracts in Yakhont was twice as high as in Kulon under all experimental conditions (with/without 24-EB, 22/2 o C). It was concluded that the less pronounced reaction of plants of Yakhont to the use of 24-EB and chilling stress is due to their genetically determined higher cold resistance than that of Kulon.

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Formaldehyde (HCHO) pollution was eliminated by catalyst effectively. The CexZr1-xOy catalyst was prepared by coprecipitate method, and its performance of HCHO removal was investigated. The results showed that the HCHO removal rate decreased from 100% to 60.88% when the reaction time was from 24h to 48h.In order to study the deactivation mechanism of the CexZr1-xOy catalyst,N2 adsorption and desorption, SEM, EDS, FT-IR, XRD and XPS were used to characterize CexZr1-xOy after different reaction times. Characterization results showed that the pore structure of CexZr1-xOy did not change significantly with the extension of reaction time, and C6H9CeO6 and Ce(CO3)2 increased gradually, while the active component Ce4+ decreased sharply. Therefore, the production and deposition of products are the main reasons for the deactivation of the CexZr1-xOy catalyst. The catalytic performance of regenerated CexZr1-xOy catalyst was tested for 24h, and the results showed that it almost recovered to fresh CexZr1-xOy catalyst. This provides a reference for the preparation of efficient catalyst for formaldehyde removal.

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The study was aimed to evaluate the antioxidant and antiaging potential of Biofield Energy Healing Treatment (the Trivedi Effect®) on a novel test formulation in in vitro. The test formulation was divided into two parts

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Finding an environmental-friend and an affordable method to remove contaminated soils from polycyclic aromatic hydrocarbons (PAHs) is now an attractive field for researchers. PAHs are slightly soluble, thus hardly dissolve in organic compounds, and also biological and chemical degradation processes are not effective to remove them, and the process of extracting these pollutants from soil is a complex process. Super-critical fluid extraction is an innovative process in the field of contaminated soil treatment. Extraction with super-critical fluid is a simple and rapid extraction process which uses supercritical fluids as solvents. This method addresses extraction methods using supercritical and subcritical fluid. The results showed that the supercritical fluid process is very suitable to remove the pollutants such as PHCs, PAHs, PCBs, dioxins, Furans, phenols, Chlorophenols, insecticides, metals and radioactive substances. The supercritical fluid extraction using CO2 also has the ability to effectively eliminate organic and inorganic compounds present in different contaminated soils. Moreover, this method is more economical for polluted soil treatment compared to other available methods. On the other hand, using this method that uses water is environment-friendly and has lower cost and a higher safety level. Research has also shown that pressurized hot water extraction (SWE) is a better way to extract PAHs. In this method, the extraction process can be improved by combining the SWE process with the oxidation process by adding oxidants such as air, oxygen, hydrogen peroxide, etc.

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A 72-h fast results in a rapid decrease in circulating glucose to a lower level without a change in non-water body mass. Several metabolic adjustments are necessary. A nutrient-sufficient, carbohydrate (CHO)-free diet also has been reported to result in a decrease in glucose, and similar metabolic perturbations. However, direct comparisons are not available in subjects without, or with, type 2 diabetes (T2DM).

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All organisms age, in the search of the universal mechanisms of aging Barja analyzed results obtained with various species of mammals and birds and concluded that only two known factors correlate in the right sense (inversely) with animal longevity in vertebrates: the long life span is associated with (a) low rates of mitochondrial reactive oxygen species production, and (b) low degree of fatty acid polyunsaturation of cellular membranes including the mitochondrial ones [Barja (2014) Prog Mol Biol Transl Sci. 127:1-27].

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The Vespa orientalis venom, a secretary substance from arthropod wasps has attracted considerable interest as a potential source of pharmacological substances. Photo detoxified snake venom has been used for dementia, dengue fever, atherosclerosis, cancer, and diabetes. There was no scientific evidence on the photooxidized Vespa orientalis venom of Indian origin as well as its protein characteristic.

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White adipose tissue (WAT) is an endocrine organ with crucial role in the development of obesity and related diseases. White adipocytes have less mitochondria than brown adipocytes; nevertheless, there is an increasing body of evidence showing that mitochondrial parameters play a relevant role in WAT physiology, such as proliferation, differentiation and triacylglycerol storage levels.

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Cross-sectional study was conducted to examine and identify quality of raw bovine milk from in Arsi Zone and East Shewa Zone, in Oromia, Ethiopia. The purpose of the study was to assess hygienic practices during milking, milk collection and bacteriological quality of cow’s milk in Arsi and East Shewa Zones milk collection centers.

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Present article focuses on the in-situ generated Ag/ZnO nano catalyst for effluent treatment. It is observed that synthesis of the catalyst using starch as environment friendly surfactant resulted in plate like elongated Zinc Oxide nanoparticles.

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This paper aims to review in literature the main mechanisms of oxidative stress, pointing out the major formed metabolites, the mechanisms of cell damage and major antioxidants. Oxygen is essential to human life. The formation of free radicals (FR) is closely related to oxygen consumption, a mechanism that occurs with an incomplete reduction of this molecule.

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Cancer is a highly heterogeneous disease characterised by continuous uncontrolled growth and expansion of abnormal cells. In general, in tumor cells the signalling pathways regulating cellular processes, as cell growth and division and cell to cellcommunication result strongly altered.

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Two basic reactions occur during the anodizing of aluminum: 1) the aluminum is consumed and 2) an oxide grows. By accepting this statement as true, the anodizing process can be viewed as a corrosion process, and anodizing can be modeled using the Tafel Equation. Anodizing process parameters of electrolyte chemistry and concentration, temperature, aluminum substrate resistance and current density are presented as they relate to the Tafel Equation and how they impact the anodic aluminum oxide structure and properties. Understanding this relationship is consequent in making anodizing an engineering process, one that enables tuning the structure such that it yields distinct characteristics to fulfill design and application requirements.

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Anodisation of pure titanium has been carried out in sulphuric and in phosphoric acid solutions at potentials ranging from 50 to 150V. The SEM and AFM morphological analysis indicates that, within this potential range, oxidation in sulphuric acid solution produces better developed mesoporous oxide layers.

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The design of an electrochemical reactor for the preparation of self-supported comparatively thin (up to 10 μm) and large area (up to 50 cm2) anodic alumina membranes is described allowing growth of porous alumina at high applied potential (up to 150 V) without burning.

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In this paper, we report on the synthesis of BaTiO3 nanowires via the anodic aluminum oxide template method. To fill in the precursors of BaTiO3 into anodic aluminum oxide templates, the vacuum and drop loading method developed in our previous study was used. Ba(CH3COO)2 (barium acetate) and C12H28O4Ti (tetraisopropyl orthotitanate) were used as Ba and Ti sources, respectively. Anodic aluminum oxide membranes with the through-hole diameter of ~200 nm were used as the template for BaTiO3 nanowires.

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