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PubMed Journals Articles About "The Ozone Man, Inc." RSS

17:33 EST 18th November 2018 | BioPortfolio

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Showing "Ozone" PubMed Articles 1–25 of 241

Cardiovascular function and ozone exposure: The Multicenter Ozone Study in oldEr Subjects (MOSES).

To date, there have been relatively few studies of acute cardiovascular responses to controlled ozone inhalation, although a number of observational studies have reported significant positive associations between both ambient ozone levels and acute cardiovascular events and long-term ozone exposure and cardiovascular mortality.


Human exposure to ozone in school and office indoor environments.

Although it is recognized that ozone causes acute and chronic health effects and that even trace amounts of ozone are potentially deleterious to human health, information about global and local exposures to ozone in different indoor environments is limited. To synthesize the existing knowledge, this review analyzes the magnitude of and the trends in global and local exposure to ozone in schools and offices and the factors controlling the exposures.

Ozone Deposition and Risk Assessment for a Winter Wheat Field:Partitioning Between Stomatal and Non-stomatal Pathways.

To better understand the ozone deposition and risk assessment over agroecosystems based on the ozone flux indices, an eddy-covariance system was used for measuring the ozone deposition continuously and dynamically in a winter wheat field. We analyzed the variations in ozone concentration, total ozone flux, and stomatal and non-stomatal flux. The relationships between stomatal/non-stomatal ozone deposition velocity and the main meteorological factors were investigated. Finally, the yield losses of winter whe...


Significant effects of exposure to relatively low level ozone on daily mortality in 17 cities from three Eastern Asian Countries.

Studies have examined the variation in mortality risk associated with ambient ozone. We conducted an international cooperation study for investigating the non-linear ozone-mortality association accounting for lag effect and for examining the ozone level with significant health effect.

Influence Factors and Sensitivity of Ozone Formation in Langfang in the Summer.

The diurnal variations in ozone concentrations in the summer were studied using the temperature, wind speed and direction, total cloud cover, and solar radiation intensity data collected in Langfang, China. The ratio of volatile organic compounds to nitrogen oxides (VOCs/NO) and the EKMA curve were studied to analyze the sensitivity of ozone formation. The results showed that:① The ozone generation rate and ozone concentrations were positively correlated with the solar radiation intensity with Pearson cor...

Estimation of personal ozone exposure using ambient concentrations and influencing factors.

Evidence is limited regarding whether ambient monitoring can properly represent personal ozone exposure. We conducted a longitudinal panel study to measure personal exposure to ozone using real-time personal ozone monitors. Corresponding ambient ozone concentrations and possible influencing factors (meteorological conditions and activity patterns) were also collected. We used linear mixed-effect models to analyze personal-ambient ozone concentration associations and possible influencing factors. Ambient ozo...

Seasonal association between ambient ozone and hospital admission for respiratory diseases in Hanoi, Vietnam.

Many studies have indicated the detrimental effect of ambient ozone to respiratory health in different countries. The levels of ozone in Hanoi, Vietnam are frequently above the WHO guideline but very few studies on the effects of ambient ozone on human health have been conducted in this location. This study aimed to examine the effects of ozone on hospital admission for respiratory diseases in Hanoi, by diseases, ages and seasons.

Ozone detoxification of patulin in aqueous solution and cytotoxic evaluation using human hepatic carcinoma cells.

Patulin often contaminates fruits and fruit-base products, which seriously threats the health of consumers. In this study, ozone was used to degrade patulin in aqueous solution, and investigated the cytotoxicity of patulin after ozone detoxification on human hepatic carcinoma cells (HepG2) using MTT assay and apoptosis assay. Patulin was rapidly degraded from 24.59 mg/L to 9.85 mg/L within 180 s by 10.60 mg/L of ozone at a flow rate of 90 mL/min, and reduced by 59.94%. The half maximal inhibitory ...

Exploration of the heterogeneous effect of climate change on ozone concentration in an urban environment.

Ozone is a significant causative agent of mortality in cities. Urban environments are expressly vulnerable to global warming because of the extensive emission of air pollutants with urban heat island effect enhancing much rapidly the ozone concentration than in the less urbanized regions. This effect previously was not studied in local scale. It was hypothesized that climate change will cause heterogenic increase of ozone concentration in the different parts of the cities. To study this effect, the near-sur...

Ethylenediurea (EDU) mitigates the negative effects of ozone in rice: insights into its mode of action.

Monitoring of ozone damage to crops plays an increasingly important role for the food security of many developing countries. Ethylenediurea (EDU) could be a tool to assess ozone damage to vegetation on field scale, but its physiological mode of action remains unclear. This study investigated mechanisms underlying the ozone-protection effect of EDU in controlled chamber experiments. Ozone sensitive and tolerant rice genotypes were exposed to ozone (108 ppb, 7 h day ) and control conditions. EDU alleviated oz...

Molecular insights into the effect of ozone on human hemoglobin in autohemotherapy: Highlighting the importance of the presence of blood antioxidants during ozonation.

Ozone has been known for several decades, with its antiseptic and therapeutic effects determined by the hormesis theory. It is shown that the therapeutic efficacy of ozone therapy may be partly due to the controlled and moderate oxidative stress produced by the reaction of ozone with several biological components. In this study, the effect of ozone on healthy human hemoglobin (Hb) in the whole blood environment (in the presence of antioxidants) and in the purified form (in the absence of antioxidants) is in...

Enhanced near-surface ozone under heatwave conditions in a Mediterranean island.

Near-surface ozone is enhanced under particular chemical reactions and physical processes. This study showed the seasonal variation of near-surface ozone in Nicosia, Cyprus and focused in summers when the highest ozone levels were noted using a seven year hourly dataset from 2007 to 2014. The originality of this study is that it examines how ozone levels changed under heatwave conditions (defined as 4 consecutive days with daily maximum temperature over 39 °C) with emphasis on specific air quality and me...

Oxygen Vacancies Induced by Transition Metal Doping in γ-MnO for Highly Efficient Ozone Decomposition.

Transition metal (cerium and cobalt) doped γ-MnO (M-γ-MnO, where M represents Ce, Co) catalysts were successfully synthesized and characterized. Cerium-doped γ-MnO materials showed ozone (O) conversion of 96% for 40 ppm of O under relative humidity (RH) of 65% and space velocity of 840 L g h after 6 h at room temperature, which is far superior to the performance of the Co-γ-MnO (55%) and γ-MnO (38%) catalysts. Under space velocity of 840 L g h, the conversion of ozone over the Ce-γ-MnO catalyst under ...

Ozone risk assessment of castor (Ricinus communis L.) cultivars using open top chamber and ethylenediurea (EDU).

Castor bean (Ricinus communis L.) an important non-edible oilseed crop, is a prominent feed stock towards the generation of renewable materials for industrial production which has multiple applications ranging from cosmetics to biofuels industry. India accounts for 76% of the total world production of castor oil seed. However, major concern for developing countries like India where expanding economy led to rapid increases in gases like NOx, CO and VOCs photochemically form ozone. Ozone is strong oxidant tha...

Impact of ozone on claudins and tight junctions in the lungs.

Claudins (CLDNs) are a major transmembrane protein component of tight junctions (TJs) in endothelia and epithelia. CLDNs are not only essential for sustaining the role of TJs in cell permeability but are also vital for cell signaling through protein-protein interactions. Ozone induces oxidative stress and lung inflammation in humans and experimental models, but the impact of ozone on claudins remains poorly understood. This study was to determine the expression of TJ proteins, such as claudin 3, 4, 5, and 1...

Rotating packed bed as a novel disinfection contactor for the inactivation of E. coli by ozone.

The intensification of mass transfer and mixing in ozone-based disinfection processes is very important in order to achieve a certain disinfection effect at a reasonable cost. This study employed rotating packed bed (RPB), an efficient process intensification device, as an ozone-disinfection contactor, and its performance on disinfection and mass transfer was evaluated by the inactivation of Escherichia coli (E. coli) and mass transfer coefficient (ka). The ozone exposure (Ct value) and the log inactivatio...

Understanding long-term variations of meteorological influences on ground ozone concentrations in Beijing During 2006-2016.

Recently, ground ozone has become one major airborne pollutant and the frequency of ozone-induced pollution episodes has increased rapidly across China. However, due to the lack of long-term observation data, relevant research on the characteristics and influencing factors of urban ozone concentrations remains limited. Based on ground ozone observation data during 2006-2016, we quantified the causality influence of individual meteorological factors on ozone concentrations in Beijing using a convergent cross...

Future ozone-related acute excess mortality under climate and population change scenarios in China: A modeling study.

Climate change is likely to further worsen ozone pollution in already heavily polluted areas, leading to increased ozone-related health burdens. However, little evidence exists in China, the world's largest greenhouse gas emitter and most populated country. As China is embracing an aging population with changing population size and falling age-standardized mortality rates, the potential impact of population change on ozone-related health burdens is unclear. Moreover, little is known about the seasonal varia...

Uptake of ozone and modification of lipids in Betula Pendula pollen.

Pollen allergy risk is modified by air pollutants, including ozone, but the chemical modifications induced on pollen grains are poorly understood. Pollen lipidic extract has been shown to act as an adjuvant to the allergenic reaction and therefore, the modification of lipids by air pollutants could have health implications. Birch pollen was exposed in vitro to ozone to explore the reactivity of O on its surface and on its lipidic fraction. Uptake coefficients of ozone were determined for ozone concentratio...

Quantification of the impact of the offshore petrochemical industrial park on ambient ozone using photochemical grid modeling and assessment monitoring.

This study integrated the results of photochemical grid modeling and assessment monitoring to quantify the impact of the offshore petrochemical industrial park (OPIP), with area of 26.03 km, on ambient ozone in a coastal region of Taiwan. A highly repetitive ozone-spreading phenomenon in the adjacent OPIP area was observed, which shows that ozone spreading follows a clear cycle between offshore and inland areas during the prevailing periods of ozone events (≥ 120 ppb). The incremental ratio of ambient o...

Effects and Mechanism of the Combination of Ozone-PAC as a Pretreatment for the Reduction of Membrane Fouling.

The effects of ozone, powdered activated carbon (PAC), and their combination on controlling fouling and the removal of organic matter were investigated. The results showed that ozone mainly oxidized strong hydrophobic, high relative molecular mass () compounds and the high was transferred to medium and small hydrophilic fractions. Ozone could control fouling effectively, demonstrating that hydrophobic organic matter with higher contributed to membrane fouling. PAC adsorbed organics with small and allevi...

Chemical cleaning-associated generation of dissolved organic matter and halogenated byproducts in ceramic MBR: Ozone versus hypochlorite.

This study characterized the dissolved organic matter (DOM) and byproducts generated after the exposure of activated sludge to ozone and NaClO in ceramic MBR. It was found that NaClO triggered more significant release of DOM than ozone. Proteins with the molecular weight greater than 20 kDa and humic acid like-substances were the principal components of DOM generated by NaClO, while ozone was found to effectively degrade larger biopolymers to low molecular weight substances. The results showed that more t...

Improved DBP elimination from swimming pool water by continuous combined UV and ozone treatment.

Chlorine is the most frequently used disinfectant and oxidant for maintaining swimming pool water quality; however, it reacts continuously with dissolved organic matter to produce disinfection by-products (DBPs), which are a health risk for pool users. UV treatment is used widely to remove chloramines, which are the most prevalent group of DBPs, albeit chloro-organic DBP concentrations often increase during post-UV chlorination. In this work, UV and ozone treatments were investigated as additional technolog...

The microbial killing capacity of aqueous and gaseous ozone on different surfaces contaminated with dairy cattle manure.

A high reactivity and leaving no harmful residues make ozone an effective disinfectant for farm hygiene and biosecurity. Our objectives were therefore to (1) characterize the killing capacity of aqueous and gaseous ozone at different operational conditions on dairy cattle manure-based pathogens (MBP) contaminated different surfaces (plastic, metal, nylon, rubber, and wood); (2) determine the effect of microbial load on the killing capacity of aqueous ozone. In a crossover design, 14 strips of each material ...

Non-invasive Oxygen-Ozone therapy in treating digital ulcers of patients with systemic sclerosis.

Digital ulcers (DUs) in Systemic sclerosis (SSc) result from recurrent Raynaud's phenomenon (RP) and microtrauma with high impact on quality of life. Medical use of ozone (triatomic oxygen) was initiated in the 19th century. Ozone has multiple therapeutic effects in wound healing due to the property of releasing nascent oxygen, which has been shown to stimulate antioxidant enzymes. We aimed to assess the effects of ozone therapy on the healing of scleroderma DUs and determine levels of expression of vascula...


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