Journal articles: 'Ozone treatments'

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Morelli, Luca, Simona Carla Bramani, Marco Cantaluppi, Mara Pauletto, and Alessandro Scuotto. "Comparison among different therapeutic techniques to treat low back pain: a monitored randomized study." Ozone Therapy 1, no. 1 (April 5, 2016): 17. http://dx.doi.org/10.4081/ozone.2016.5842.

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Idiopathic low back pain can be considered as a chronic condition, characterized by recurrent episodes of pain and functional limitation. The aim of this study is to compare two therapeutic methods to treat this chronic disease: the oxygen-ozone therapy and the diathermy through Tear® therapy. Two groups of 10 patients each who suffered from postural idiopathic low back pain due to different pathologies have been recruited. All selected patients have been evaluated through spinometry and have been given the Oswestry low back pain disability questionnaire to fill in at the beginning of the treatments and at the end of them with a three-month follow-up. The first group underwent a diathermy treatment through Tecar® therapy, whilst the second group received an oxygen-ozone therapy treatment through a paravertebral lumbar infiltration; both treatments have been associated with a standard physiokinesitherapy treatment. Data collected through Formetric spinometry show an improvement in both groups, but in the second group (treated with oxygen-ozone therapy+physiokinesitherapy), the improvement is greater (from 6% to 57%) against the first group (from 20% to 38%). In conclusion, the study has cor roborated the validity of both treatments leading to improvement of symptomatology, but while one treatment leads to some relapses after a few months, the second one has a greater healing effect, which preserves over time.

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Cheng, Xue Feng, James A. Olson, and Rodger P. Beatson. "A comparison between the effects of ozone and alkaline peroxide treatments on TMP properties and subsequent low consistency refining." BioResources 7, no. 1 (November 5, 2011): 99–111. http://dx.doi.org/10.15376/biores.7.1.99-111.

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As part of a program to reduce electrical energy consumption in the refining process, the effects of the ozone and alkaline peroxide treatments on fibre and handsheet properties, prior and subsequent to low consistency (LC) refining, were assessed and compared by applying different levels of ozone and a range of peroxide and alkali charges to a primary stage hemlock thermomechanical pulp (TMP). Both highly alkaline peroxide treatments and ozone treatments decreased the specific energy required for strong mechanical pulp. The improvement in pulp strength through alkaline peroxide treatment mainly resulted from pulp surface changes caused by generation of acid groups. The highly alkaline peroxide treatments significantly increased pulp brightness but did not promote the further fibrillation during the subsequent LC refining. On the other hand, ozone treatments provided tensile strength increases, along with small brightness enhancements for the dark hemlock TMP, and increased the tensile gains obtained through LC refining. The effects of ozone treatments on tensile strength before and after LC refining were the result of pulp surface modifications, fibre swelling, and loss of fibre wall integrity due to non-selective chemical attack. High levels of ozone treatment caused tear strength to decrease during subsequent LC refining.

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Cayuela, J. A., A. Vázquez, A. G. Pérez, and J. M. García. "Control of Table Grapes Postharvest Decay by Ozone Treatment and Resveratrol Induction." Food Science and Technology International 15, no. 5 (October 2009): 495–502. http://dx.doi.org/10.1177/1082013209350539.

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Continued and intermittent (12 h per day) ozone treatments (2 ppm) to control postharvest decay have been assayed during the storage of ‘Superior Seedless’, ‘Cardinal CL80,’ and ‘Regina Victoria’ table grapes (Vitis vinifera L.) at 5 °C for 72 days. The effects of these treatments on the main fruit quality parameters, including resveratrol content, were monitored. Both ozone treatments considerably reduced decay of cold stored grapes compared to those kept in air, continuous ozone treatment being the most effective for controlling postharvest losses. Intermittent ozone treatment induced the highest resveratrol content in stored grapes. On the contrary, ozone-treated grapes got lower scores in the sensory evaluation tests and also showed significantly higher weight losses than the fruits kept in air.

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Ye, Long Hua, Qiu Jing Li, Li Xue, Gan Wen Lie, Xiao Li Hou, and Hong Yue Chen. "Effects of Ozone and Drought on Physiological Characteristics of Three Seedling Types in South China." Applied Mechanics and Materials 522-524 (February 2014): 1089–97. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1089.

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Seedlings of Michelia macclurei, Cinnamomum camphora and Rhodoleiachampionii were placed in open-top chambers (OTC) with two ozonic treatments including E40 (nature air, 40 ppb) and E150 (150 ppb) and two water treatments. Physiological indexes such as chlorophyll, soluble sugar, soluble protein, proline, MDA and SOD of three seedling types were evaluated. With increasing experimental time, chlorophyll content generally decreased or remained steady, soluble sugar content increased followed by a decrease and SOD activity increased for the three seedling types in ozone treatment, drought treatment or ozone-drought intercross treatment. Contents of soluble protein and proline increased for the three seedling types in ozone treatment and drought treatment. The MDA content increased for M. macclurei and C. camphora in ozone treatment and drought treatment and for R. championii in the three stress treatments. Principal component analysis indicated that the resistance abilities of ozone, drought or intercross stress for the three seedling types was C. camphora seedlings > M. macclurei seedlings > R. championii seedlings.

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Sarron, Elodie, Pascale Gadonna-Widehem, and Thierry Aussenac. "Ozone Treatments for Preserving Fresh Vegetables Quality: A Critical Review." Foods 10, no. 3 (March 12, 2021): 605. http://dx.doi.org/10.3390/foods10030605.

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Ozone is recognized as an antimicrobial agent for vegetables storage, washing, and processing. This strong disinfectant is now being used in the food industry. In this review, the chemical and physical properties of ozone, its generation, and factors affecting ozone processing efficiency were explained as well as recent regulatory developments in the food industry. By then selecting three vegetables, we show that ozone avoids and controls biological growth on vegetables, keeping their attractive appearance and sensorial qualities, assuring nutritional characteristics’ retention and maintaining and increasing the shelf-life. In liquid solution, ozone can be used to disinfect processing water and vegetables, and in gaseous form, ozone helps to sanitize and preserve vegetables during storage. The multifunctionality of ozone makes it a promising food processing agent. However, if ozone is improperly used, it causes some deleterious effects on products, such as losses in their sensory quality. For an effective and a safe use of ozone, specific treatment conditions should be determined for all kinds of vegetables. In a last step, we propose highlighting the different essential characteristics of ozone treatment in order to internationally harmonize the data relating to the treatments carried-out.

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Ye, Long Hua, Hai Yong Bao, Zhi Yun Wang, Gan Wen Lie, Hong Yue Chen, Xue Ping Zhang, Xiang Chen, Huan Ke, Xue Qin Tian, and Jia De Tan. "Effects of Ozone and Drought on Biomass Allocation of Four Seedlings in South China." Advanced Materials Research 864-867 (December 2013): 2478–84. http://dx.doi.org/10.4028/www.scientific.net/amr.864-867.2478.

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Seedlings ofMichelia macclurei,Cinnamomum camphora,RhodoleiachampioniiandMytilaria laosensiswere placed in open-top chambers (OTC) with three ozonic treatments including E20 (20 ppb), E40 (nature air, 40 ppb) and E160 (160 ppb) and two water treatments. Root biomass, stem biomass and leaf biomass total biomass and root/shoot ratio of four seedling types were evaluated. The results showed that there were no significant differences in impacts of ozone stress and drought stress on root, stem, leaf, and total biomass ofM. macclureiamong different treatments. The biomass ofM. laosensisdecreased with increasing ozone concentration, whereas biomass ofC. camphoraandR. championiichanged irregularly. Most of the biomass of four kind seedlings under ozone and drought intercross stresses was lower than those under ozone stress. The root/shoot ratios of four seedling species were all low. The ratios under high concentration ozone (160 ppb) were lower than the control treatment. And the ratios of different treatments under drought were lower than those were not under drought when they were under the same concentration of ozone.

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Retzlaff, W. A., L. E. Williams, and T. M. DeJong. "Photosynthesis, Growth, and Yield Response of `Casselman' Plum to Various Ozone Partial Pressures during Orchard Establishment." Journal of the American Society for Horticultural Science 117, no. 5 (September 1992): 703–10. http://dx.doi.org/10.21273/jashs.117.5.703.

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Nursery stock of plum (Prunus salicina Lindel., `Casselman') was planted 1 Apr. 1988 in an experimental orchard at the Kearney Agricultural Center, Univ. of California, near Fresno. The trees were enclosed in open-top fumigation chambers on 1 May 1989 and exposed to three atmospheric ozone partial pressures (charcoal-filtered air, ambient air, and ambient air + ozone) from 8 May to 15 Nov. 1989 and from 9 Apr. to 9 Nov. 1990. Trees grown outside of chambers were used to assess chamber effects on tree performance. The mean 12-hour (0800-2000 hr Pacific Daylight Time) ozone partial pressures during the 2-year experimental period in the charcoal-filtered, ambient, ambient + ozone, and nonchamber treatments were 0.044, 0.059, 0.111, and 0.064 μPa·Pa-1 in 1989 and 0.038, 0.050, 0.090, and 0.050 pPa·Pa-1 in 1990, respectively. Leaf net CO2 assimilation rate of `Casselman' plum decreased with increasing atmospheric ozone partial pressure from the charcoal-filtered to ambient + ozone treatment. There was no difference in plum leaf net CO2 assimilation rate between the ambient chamber and nonchamber plots. Trees in the ambient + ozone treatment had greater leaf fall earlier in the growing season than those of the other treatments. Cross-sectional area growth of the trunk decreased with increasing atmospheric ozone partial pressures from the charcoal-filtered to ambient + ozone treatment. Yield of plum trees in 1990 was 8.8, 6.3, 5.5, and 5.5 kg/tree in the charcoal-filtered, ambient, ambient + ozone, and nonchamber treatments, respectively. Average fruit weight (grams/fruit) was not affected by atmospheric ozone partial pressure. Fruit count per tree decreased as atmospheric ozone partial pressure increased from the charcoal-filtered to ambient + ozone treatment. Decreases in leaf gas exchange and loss of leaf surface area were probable contributors to decreases in trunk cross-sectional area growth and yield of young `Casselman' plum trees during orchard establishment.

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Puia, Carmen, Ioan Oroian, and Veronica Florian. "Effect of Ozone Exposure on Phytopathogenic Microorganisms on Stored Apples." Acta Agraria Debreceniensis, no. 15 (December 14, 2004): 9–13. http://dx.doi.org/10.34101/actaagrar/15/3350.

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The aim of our study was to clarify the effect of ozone exposure on several phytopathogenic fungi on stored apple fruits under different storage conditions. The study was conducted at Bistrita, Romania, in the storehouse of an experimental apple orchard in 2002 and 2003. Two widely grown apple cultivars (‘Jonathan’ and ‘Golden Delicious’) were used. General microbial examination of the fruits was made during storage in order to identify the most important storage pathogens. Efficacy of six ozone treatments was evaluted on fruit decay caused by phytopathogenic fungi. Monthly observations (January, February, March and April) were made of the degree of decay and three measurements were assessed (disease frequency, disease intensity and degree of attack). Our results showed that the most important phytopathogenic fungi during storage was blue mold, caused by species of Penicillium. Disease frequency of apple fruits was very high on cv. ‘Jonathan’, much higher than on cv. ‘Golden delicious’. Ozone treatments (25 ppm ozone for 0.5 and 1.5 hours in November) caused significantly lower disease incidence on stored apple than all other ozone treatments. For longer storage, it seems that additional ozone treatments in February increased treatment efficacy. Cv. ‘Golden delicious’ seemed to be more resistant to storage diseases than cv. ‘Jonathan’ both on the untreated and treated fruits. The effect of the ozone treatments was also the most effective when 25 ppm ozone was applied for 0.5 and 1.5 hours in November.

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Castilo, Denise Viviane Ferreira Del, Marcello Magri Amaral, Carla Roberta Tim, Cintia Cristina Santi Martignago, Daniela Bezerra Macedo, Deisiane Del Castilo Bastos, and Lívia Assis. "Comparison of Efficacy of Unna’s boot and Ozone therapy on Chronic Venous Leg Ulcers: a series of case." Research, Society and Development 9, no. 9 (August 11, 2020): e44996967. http://dx.doi.org/10.33448/rsd-v9i9.6967.

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The aim of this study was to evaluate and compare the effectiveness of Unna’s boot and ozone therapy on chronic venous leg ulcers. Seven patients with chronic venous leg ulcers were taken into the study and were randomly divided into two groups: Unna’s boot treatment group (BU); Ozone treatment group (OZ). The therapies were performed weekly until wound closure. The morphological descriptive results demonstrated that during the treatments, it was possible to observe the presence of semi-planar borders, granulation tissue, reduction of edema, fibrin and exudate and absence of odor. These morphological modifications were more pronounced in the OZ when compared to the BU. Furthermore, both treatments promoted the same wound healing time, never the less the ozone therapy produced a higher percentage of weekly wound reduction compared to Unna's boot. Unna's boot and ozone therapy treatments appeared to positively impact the course of wound healing in chronic wounds, however the ozone therapy may improve the healing of chronic venous leg ulcers in a higher weekly percentage.

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Uzun, H., E. G. Kaynak, E. Ibanoglu, and S. Ibanoglu. "Chemical and structural variations in hazelnut and soybean oils after ozone treatments." Grasas y Aceites 69, no. 2 (June 4, 2018): 253. http://dx.doi.org/10.3989/gya.1098171.

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In the present work, the effect of ozone treatments on the structural properties of soybean oil (SBO) and hazelnut oil (HO) were investigated. The study presents the findings and results about the oxidation of HO and SBO with ozone, which has not been fully studied previously. The HO and SBO were treated with ozone gas for 1, 5, 15, 30, 60, 180 and 360 min. The ozone reactivity with the SBO and HO during the ozone treatment was analyzed by 1H, 13C NMR, FTIR and GC. The iodine value, viscosity and color variables (L*, a* and b*) of untreated and ozone treated oils were determined. Reaction products were identified according to the Criegee mechanism. New signals at 5.15 and 104.35 ppm were assigned to the ring protons of 1,2,4- trioxolane (secondary ozonide) in the ozonated oils in 1H and 13C NMR, respectively. Ozonated oils exhibited peaks at 9.75 and 2.43 ppm in 1H and NMR, which corresponded to the aldehydic proton and α-methylene group and to the carbonyl carbon, respectively. The peak at 43.9 ppm in 13C NMR was related to the α-methylene group and to the carbonyl carbon. The new signals formed in the ozonation process gradually increased with respect to ozone treatment time. After 360 min of ozone treatment, the carbon-carbon double bond signal, which belongs to the unsaturated fatty acids, disappeared completely in the spectrum. An increase in viscosity, a decrease in iodine value and a dramatic reduction in b* of the oil samples on (+) axis were observed with increased ozone treatment time.

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Astuti, S. D., N. D. Drantantiyas, A. P. Putra, P. S. Puspita, A. Syahrom, and S. Suhariningsih. "Photodynamic effectiveness of laser diode combined with ozone to reduce STaphylicoccus aureus biofilm with exogenous chlorophyll of Dracaena angustifolia leaves." Biomedical Photonics 8, no. 2 (July 10, 2019): 4–13. http://dx.doi.org/10.24931/2413-9432-2019-8-2-4-13.

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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 using exogenous chlorophyll (Chlo). The chlorophyll was extracted from leave of Dracaena angustifolia. To determine the antibacterial effect of S. aureus biofilm treatments, samples were separated into Chlo, Laser, Chlo+Laser, Ozone, Ozone+Laser, Chlo+Ozone+Laser categories. The data were analyzed using ANOVA test. The result of this study showed that Chlo+Ozone+Laser combine treatment at 20 s exposure of ozone with 4 min of irradiation time lead to 80.26 % reduction of biofilm activity, which was the highest efficacy of all the treatment groups. The combination of laser, chlorophyll and lower ozone concentration increases the effectiveness of photodynamic inactivation.

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Dan, Guo, Zhi Hong Zhang, Xin An Zeng, Zhong Han, Wen Bo Luo, Chao Tang, and Siew Young Quek. "Synergetic Effects of Pulsed Electric Field and Ozone Treatments on the Degradation of High Molecular Weight Chitosan." International Journal of Food Engineering 10, no. 4 (December 1, 2014): 775–84. http://dx.doi.org/10.1515/ijfe-2014-0100.

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Abstract A synergetic method integrating both pulsed electric field (PEF) and ozone treatment was developed as a novel approach to investigate the degradation of high molecular weight chitosan (Mw=4.5×105 Da). A device integrating both components was designed and assembled for the experiments. Results showed that the highest degradation percentage of chitosan was achieved with PEF/ozone co-treatment generated at experimental conditions of 1.2 L/min of ozone flow rate, 100 mL/min of 0.6% (w/v) chitosan solution flow rate, and 26.7 kV/cm of PEF intensity. The degradation percentage after 60 min PEF treatment was 24.89%, whereas it was improved to 94.89% by ozone treatment for 60 min. Combining the two treatments resulted in enhanced degradation percentage of 99.56%, with low molecular weights sample (Mw<2,500 Da) obtained. FTIR analysis demonstrated that the amide structure of the degradation products was minimally affected by the co-treatment. XRD pattern indicated that the crystallinity of the degradation products decreased. In addition, it could complete dissolve in water after 60 min PEF/ozone co-treatment. These results demonstrated the synergetic PEF/ozone co-treatment as an effective method for degradation of high molecular weight chitosan.

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KALCHAYANAND, NORASAK, JOSEPH M. BOSILEVAC, DAVID A. KING, and TOMMY L. WHEELER. "Evaluation of UVC Radiation and a UVC-Ozone Combination as Fresh Beef Interventions against Shiga Toxin–Producing Escherichia coli, Salmonella, and Listeria monocytogenes and Their Effects on Beef Quality." Journal of Food Protection 83, no. 9 (August 20, 2020): 1520–29. http://dx.doi.org/10.4315/jfp-19-473.

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ABSTRACT This research study was conducted to evaluate treatments with UVC light and a combination of UVC and ozone that have recently received attention from the beef processing industry as antimicrobial interventions that leave no chemical residues on products. The effectiveness of UVC and UVC plus gaseous ozone treatments was evaluated for inactivation of pathogenic bacteria on fresh beef and for any impact on fresh beef quality. Fresh beef tissues were inoculated with cocktails of Shiga toxin–producing Escherichia coli (STEC) strains (serotypes O26, O45, O103, O111, O121, O145, and O157:H7), Salmonella, and Listeria monocytogenes. Inoculated fresh beef tissues were subjected to UVC or UVC-ozone treatments at 106 to 590 mJ/cm2. UVC treatment alone or in combination with ozone reduced populations of STEC, Salmonella, L. monocytogenes, and aerobic bacteria from 0.86 to 1.49, 0.76 to 1.33, 0.5 to 1.14, and 0.64 to 1.23 log CFU, respectively. Gaseous ozone alone reduced populations of E. coli O157:H7, Salmonella, and L. monocytogenes by 0.65, 0.70, and 0.33 log CFU, respectively. Decimal reduction times (D-values) for STEC serotypes, Salmonella, and L. monocytogenes on surfaces of fresh beef indicated that the UVC-ozone treatment was more effective (P ≤ 0.05) than UVC light alone for reducing pathogens on the surface of fresh beef. Exposure to UVC or UVC plus gaseous ozone did not have a deleterious effect on fresh meat color and did not accelerate the formation of oxidative rancidity. These findings suggest that UVC and UVC in combination with gaseous ozone can be useful for enhancing the microbial safety of fresh beef without impairing fresh beef quality. HIGHLIGHTS

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Iztayev, A. I., M. M. Маyемеrоv, M. A. Yakiyayeva, A. N. Zhakatayeva, A. A. Моldakarimov, and B. Zh Muldabekova. "New methods for long storage of raw sugar products." Journal of Almaty Technological University, no. 3 (January 16, 2021): 44–47. http://dx.doi.org/10.48184/2304-568x-2020-3-44-47.

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The article examined the use of electrophysical methods, including ozone treatment in the cavitation zone for storing sugar beets. Experimental studies of samples of sugar beet from the Koksu sugar factory of the second degree of infection showed that ozone-cavitation treatments have a pleasant effect on long-term storage. As a result, it was proved that treatment with an ozone concentration of 8 g/m3 for 20 minutes at an overpressure of up to 5 ati is the most optimal mode.

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Sanz, M. J., J. L. Porcuna, E. Calvo, and C. Martin. "Artichoke Cultivars (var. “Blanca de Tudela”) under Elevated Ozone Concentrations." Scientific World JOURNAL 2 (2002): 811–17. http://dx.doi.org/10.1100/tsw.2002.150.

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Ozone concentrations rise to phytotoxic levels from spring to autumn at western Mediterranean basin coastal sites, where artichoke is one of the most important crops. Simultaneously, from year to year and especially since the early 1980s, resprouting of the stumps has been decreasing in Valencian Community artichoke plantations. To see if ozone might be playing a role in this decrease, a number of plants were exposed to different levels of ozone. Results of the ozone treatments showed reduced biomass in the offshoots of plants exposed to the highest ozone treatment. The exposure to ambient ozone during the stump-establishment period, when compared to filtered-air conditions, resulted in a reduction in yield when plants were transplanted in the field under ambient ozone concentrations. And when plants were exposed to acute short picks, typical ozone visual injury appeared in the older leaves.

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Lee, Uk, Sukhyun Joo, Ned B. Klopfenstein, and Mee-Sook Kim. "Efficacy of washing treatments in the reduction of post-harvest decay of chestnuts (Castanea crenata ‘Tsukuba’) during storage." Canadian Journal of Plant Science 96, no. 1 (February 1, 2016): 1–5. http://dx.doi.org/10.1139/cjps-2015-0089.

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This research evaluated the influence of different washing treatments (i.e., tap water, ozone, microbubbles, and ozone combined with microbubbles) on post-harvest decay of chestnuts (Castanea crenata ‘Tsukuba’) during storage. Overall, treatments with ozone and microbubbles significantly reduced the decay frequency and the associated microbial populations (aerobic bacteria, mold/filamentous fungi, and yeasts) during post-harvest storage compared with the traditional practice (tap water washing). Enhancing the efficacy of chestnut washing treatments will contribute to the improved storage of high-quality chestnuts.

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Suryawan, I. Wayan Koko, Anshah Silmi Afifah, Muhammad Rizki Apritama, Yosef Adicita, and Iva Yenis Septiariva. "Enhanced Effluent Quality of Anaerobic Baffled Reactor (ABR) With Ozone and Aerobic Activated Sludge for Livestock Wastewater Treatment." EPI International Journal of Engineering 3, no. 2 (January 22, 2021): 108–12. http://dx.doi.org/10.25042/epi-ije.082020.03.

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ABR used to treat wastewater with high COD level such as livestock wastewater. ABR treatment consists of compartments which are limited by vertical bulkhead growth with attached bacteria. However, ABR treatment only capable degraded COD level by 50 – 53%. This value did not qualify to be discharged into the environment. Therefore, ABR treatment need further treatment with ozone treatment and aerobic activated sludge. There were two treatments in this study, which are ABR with ozone treatment and aerobic activated sludge (S1) and ABR with aerobic activated sludge (S2). COD degradation with ozone treatment showed low efficiency, 31.1 ± 1.5 % but BOD/COD level increased. Aerobic activated sludge with batch system showed efficiency of COD degradation as 95.3 ± 2.2 % (with ozone treatment) and 78.6 ± 4.5 % without ozone treatment. The final concentration effluent for livestock wastewater was 167.7 ± 62 mg/L. Aerobic activated sludge with continuous system was conducted to test that result and it average efficiency only decreased into 85%. This concentration was qualified to be discharged into environment.

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Reich, Peter B., Anna W. Schoettle, Hans F. Stroo, John Troiano, and Robert G. Amundson. "Effects of ozone and acid rain on white pine (Pinus strobus) seedlings grown in five soils. I. Net photosynthesis and growth." Canadian Journal of Botany 65, no. 5 (May 1, 1987): 977–87. http://dx.doi.org/10.1139/b87-135.

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Four replicated factorial experiments were conducted to assess the response of potted white pine (Pinus strobus L.) seedlings to combined acid rain, ozone, and soil treatments. The objectives of the study were to quantify plant response to each pollutant alone and to determine whether the pollutants and edaphic factors interact in affecting physiological processes in white pine. In these studies, seedlings were grown in five forest soils and exposed for 4 months to realistic levels of acid rain and ozone. Acid rain treatments consisted of exposure to simulated rain of pH 5.6, 4.0, 3.5, or 3.0, while ozone treatments consisted of exposure to 0.02, 0.06, 0.10, or 0.14 ppm ozone. Minimal interaction between acid rain and ozone was observed with regard to photosynthesis or growth. Acid rain and soil type had a strong interaction in determining plant response. In general, acid rain caused increased growth and net photosynthesis as a result of nitrogen fertilization from the simulated rain. However, the extent of this response was inversely correlated with the availability of nitrogen in each soil. Ozone treatments caused decreased net photosynthesis in pine seedlings.

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Min, Xin Min, and Hong Fei Liu. "Calculation on Interaction between Ozone and Carrier to Form Ozonic Compound." Advanced Materials Research 179-180 (January 2011): 490–95. http://dx.doi.org/10.4028/www.scientific.net/amr.179-180.490.

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It has some encouraging results to use ozone in medicaments, treatments and so on. As it is usually in gas state, unstable and strong oxidability, ozone is difficult to be stored and used commonly. It is the key matter in use of ozone commonly or conveniently that the carrier material and preparation response conditions are studied to make the bond strength between ozone and carrier to be felicitous and with the proper velocity to release ozone from the ozonic compound. Ozonic compound and related single molecules were calculated to study the interaction between ozone and carrier to form ozonic compound. The carrier and ozonic compound are designed from the calculations. The stability of the ozonic compound, or the bond strength between ozone and carrier are controlled felicitously to release ozone from the ozonic compound with proper velocity. Ozone antimicrobial can be composed and used conveniently, especially for common families. There are some characteristics of ozone antimicrobial or ozone, such as universal applicability, efficiency and rapidity, security, strong penetrability, no drug resistance and sterilization and treatment simultaneity.

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TRINDADE, MARCO ANTONIO, MARTA MITSUI KUSHIDA, NILDA D. MONTES VILLANUEVA, DAVID UENAKA dos SANTOS PEREIRA, and CELSO EDUARDO LINS de OLIVEIRA. "Comparison of Ozone and Chlorine in Low Concentrations as Sanitizing Agents of Chicken Carcasses in the Water Immersion Chiller." Journal of Food Protection 75, no. 6 (June 1, 2012): 1139–43. http://dx.doi.org/10.4315/0362-028x.jfp-11-288.

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The aim of this study was to investigate the effects of the use of chlorine or ozone as sanitizing agents in the water of chicken immersion chilling, using the residual levels usually applied in Brazil (1.5 ppm), comparing the effects of these treatments on the microbiological, physicochemical, and sensory characteristics of carcasses. Chicken carcasses were chilled in water (4°C) with similar residual levels of ozone and chlorine until reaching temperatures below 7°C (around 45 min). The stability of carcasses was assessed during 15 days of storage at 2 ± 1°C. Microbiological, surface color (L*, a*, b* parameters), pH value, lipid oxidation (thiobarbituric acid reactive substances index), and sensory evaluation (on a 9-point hedonic scale for odor and appearance) analyses were carried out. The presence of Salmonella was not detected, coagulase-positive staphylococci counts were below 102 CFU/ml of rinse fluid, and Escherichia coli and total coliform counts were below 105 CFU/ml of rinse fluid until the end of the storage period for both treatments. Psychrotrophic microorganism counts did not differ (P > 0.05) between chlorine and ozone treatments, and both values were near 109 CFU/ml of rinse fluid after 15 days at 4 ± 1°C. pH values did not differ between treatments (P >0.05) or during the storage period (P > 0.05). In addition, neither chlorine nor ozone treatment showed differences (P > 0.05) in the lipid oxidation of carcasses; however, the thiobarbituric acid reactive substances index of both treatments increased (P ≤ 0.05) during the storage period, reaching values of approximately 0.68 mg of malonaldehyde per kg. Samples from both treatments did not differ (P > 0.05) in their acceptance scores for odor and overall appearance, but in the evaluation of color, ozone showed an acceptance score significantly higher (P ≤ 0.05) than that for the chlorine treatment. In general, under the conditions tested, ozone showed results similar to the results for chlorine in the disinfection of chicken carcasses in the immersion chilling, which may indicate its use as a substitute for chlorine in poultry slaughterhouses.

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Srinivasan, Samuel Raj, and Bennett T. Amaechi. "Ozone: A paradigm shift in dental therapy." Journal of Global Oral Health 2 (September 25, 2019): 68–77. http://dx.doi.org/10.25259/jgoh_56_2019.

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Objectives: Ozone has been used in medicine for over a century, but its clinical applications in dentistry have just begun to be explored. The effects of ozone either as gas, water, or oil in the treatment of dental diseases such as caries, periodontitis, and hypersensitivity have been investigated and the results are promising. Thus, the objective of this review is to shed light on the recent clinical oral applications of ozone and summarize the various research findings regarding the use of ozone in dentistry. This review would enable researchers to know the background of ozone in dentistry and to help them formulate new and improved protocols to study the possible applications of ozone in clinical dentistry. Data Sources: Pertinent literature on the application of ozone to treat various dental diseases was thoroughly searched using Medline, PubMed, Central, Cochrane, and Embase. Conclusion: Clinical use of ozone is a minimally invasive approach toward the prevention and control of oral diseases. The present literature review observed encouraging results on the use of ozone in various modalities of dental treatments. However, the use of ozone in dentistry needs further investigation using controlled clinical trials, with sufficient, follow-up period and standardized measurements to establish ozone therapy as a standard treatment modality in dental practice.

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Rivera-Utrilla, J., M. Sánchez-Polo, M A Mondaca, and C A Zaror. "Effect of ozone and ozone/activated carbon treatments on genotoxic activity of naphthalenesulfonic acids." Journal of Chemical Technology & Biotechnology 77, no. 8 (June 27, 2002): 883–90. http://dx.doi.org/10.1002/jctb.655.

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NIAKOUSARI, MEHRDAD, ZAHRA ERJAEE, and SHAHRAM JAVADIAN. "Fumigation Characteristics of Ozone in Postharvest Treatment of Kabkab Dates (Phoenix dactylifera L.) against Selected Insect Infestation." Journal of Food Protection 73, no. 4 (April 1, 2010): 763–68. http://dx.doi.org/10.4315/0362-028x-73.4.763.

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Methyl bromide fumigation, the most accepted quarantine treatment for dates and many other dried commodities, will be phased out by 2015 worldwide. As a result, there is a critical need to develop durable alternatives for methyl bromide as postharvest treatments of agricultural commodities. This article presents a new method for postharvest treatment of Kabkab dates (Phoenix dactylifera L.) by application of gaseous ozone to reduce or eliminate all life stages (adults, larvae, and eggs) of Indian meal moth (Plodia interpunctella) and sawtooth grain beetle (Oryzaephilus surinamensis). The effect of the ozonation process on the sugar content of dates was also evaluated. Infested dates were exposed to ozone concentrations of 600, 1,200, 2,000, and 4,000 ppm for 1 and 2 h. As insect eggs are known to be most tolerant to many chemical or physical treatments, they were additionally exposed to an atmosphere of pure carbon dioxide prior to ozonation. Exposing samples to ozone concentrations of >2,000 ppm for 2 h resulted in complete mortality of larvae and adults. Exposure to 4,000 ppm of ozone for 2 h resulted in 80% mortality of eggs, and exposure to CO2 prior to ozonation did not improve the effect of ozonation on eggs. Ozone did not have any influence on the sugar content of Kabkab dates.

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Blanca Roncero, M., J. F. Colom, and T. Vidal. "Why oxalic acid protects cellulose during ozone treatments?" Carbohydrate Polymers 52, no. 4 (June 2003): 411–22. http://dx.doi.org/10.1016/s0144-8617(02)00333-8.

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Tripathi, Smriti, Vinita Pathak, Devendra Mani Tripathi, and B. D. Tripathi. "Application of ozone based treatments of secondary effluents." Bioresource Technology 102, no. 3 (February 2011): 2481–86. http://dx.doi.org/10.1016/j.biortech.2010.11.028.

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Retzlaff, William A., Ted M. DeJong, and Larry E. Williams. "SCREENING ALMOND CULTIVARS FOR OZONE SUSCEPTIBILITY." HortScience 25, no. 9 (September 1990): 1136c—1136. http://dx.doi.org/10.21273/hortsci.25.9.1136c.

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Uniform nursery stock of five almond cultivars (Prunus dulcis Mill., cv Nonpareil, Mission, Carmel, Butte, and Sonora) propagated on peach (P. domestica L. Batsch.) rootstock were planted in open-top fumigation chambers on 19 April 1989 at the University of California's Kearney Ag Center located in the San Joaquin Valley of California. The trees were exposed to three atmospheric ozone partial pressures (charcoal filtered air, ambient air, or ambient air+ozone) from 1 June to 2 November 1989. The mean 12-h (0800-2000 h) ozone partial pressure measured in the open-top chambers during the experimental period averaged 0.038, 0.060, and 0.112 μPa Pa-1 ozone in the charcoal filtered, ambient, and ambient+ ozone treatments, respectively. Leaf net CO2 assimilation and cross-sectional area growth of Nonpareil trees were reduced by increasing atmospheric ozone partial pressures, but Mission trees were unaffected. Foliage of Nonpareil almond abscised prematurely in the ambient and ambient+ozone treatments. The susceptibility of the Butte, Carmel, and Sonora almond cultivars to ozone was intermediate between the Nonpareil and Mission cultivars.

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Ragab, A., E. Shreef, E. Behiry, S. Zalat, and M. Noaman. "Randomised, double-blinded, placebo-controlled, clinical trial of ozone therapy as treatment of sudden sensorineural hearing loss." Journal of Laryngology & Otology 123, no. 1 (October 17, 2008): 54–60. http://dx.doi.org/10.1017/s0022215108003770.

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AbstractObjective:To investigate the safety and efficacy of ozone therapy in adult patients with sudden sensorineural hearing loss.Design:Prospective, randomised, double-blinded, placebo-controlled, parallel group, clinical trial.Subjects:Forty-five adult patients presented with sudden sensorineural hearing loss, and were randomly allocated to receive either placebo (15 patients) or ozone therapy (auto-haemotherapy; 30 patients). For the latter treatment, 100 ml of the patient's blood was treated immediately with a 1:1 volume, gaseous mixture of oxygen and ozone (from an ozone generator) and re-injected into the patient by intravenous infusion. Treatments were administered twice weekly for 10 sessions. The following data were recorded: pre- and post-treatment mean hearing gains; air and bone pure tone averages; speech reception thresholds; speech discrimination scores; and subjective recovery rates.Results:Significant recovery was observed in 23 patients (77 per cent) receiving ozone treatment, compared with six (40 per cent) patients receiving placebo (p < 0.05). Mean hearing gains, pure tone averages, speech reception thresholds and subjective recovery rates were significantly better in ozone-treated patients compared with placebo-treated patients (p < 0.05).Conclusion:Ozone therapy is a significant modality for treatment of sudden sensorineural hearing loss; no complications were observed.

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Fernández, Javier, Iván del Valle Fernández, Claudio J. Villar, and Felipe Lombó. "Combined laser and ozone therapy for onychomycosis in an in vitro and ex vivo model." PLOS ONE 16, no. 6 (June 30, 2021): e0253979. http://dx.doi.org/10.1371/journal.pone.0253979.

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In order to develop a fast combined method for onychomycosis treatment using an in vitro and an ex vivo models, a combination of two dual-diode lasers at 405 nm and 639 nm wavelengths, in a continuous manner, together with different ozone concentrations (until 80 ppm), was used for performing the experiments on fungal strains growing on PDA agar medium or on pig’s hooves samples. In the in vitro model experiments, with 30 min combined treatment, all species are inhibited at 40 ppm ozone concentration, except S. brevicaulis, which didn’t show an inhibition in comparison with only ozone treatment. In the ex vivo model experiments, with the same duration and ozone concentration, A. chrysogenum and E. floccosum showed total inhibition; T. mentagrophytes and T. rubrum showed a 75% growth inhibition; M. canis showed a delay in sporulation; and S. brevicaulis and A. terreus did not show growth inhibition. This combined laser and ozone treatment may be developed as a fast therapy for human onychomycosis, as a potential alternative to the use of antifungal drugs with potential side effects and long duration treatments.

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Jordan, Michael A., Kenneth McRae, Sherry Fillmore, and Willy Renderos. "Effects of 1-MCP and Ozone on Carrot Volatiles during Storage." HortScience 41, no. 4 (July 2006): 978D—978. http://dx.doi.org/10.21273/hortsci.41.4.978d.

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Volatile compounds contribute to carrot (Daucus carota) flavor. However, effects of postharvest treatments on these compounds are not defined. To characterize treatment effects, fresh carrots (cv. Sunrise) were treated with 0 or 1.0 μL/L 1-methylcyclopropene (1-MCP) at 10 °C for 16 h, then exposed to 0, 0.3, or 1.0 μL/L ozone (O3) at 10 °C for 1, 2, or 4 days, and subsequently stored at 0 °C for up to 24 weeks. Twelve terpenes were identified in the headspace over whole carrots, including dimethylstyrene (22.5%), alpha-pinene (19.1%), caryophyllene (15.8%), beta-pinene (9.1%), p-cymene (8.3%), limonene (7.7%), gamma-terpinene (6.7%), myrcene (4.7%), gamma-terpinolene (4.5%) camphene (1.0%), alpha-phellandrene (0.52%), and sabinene (0.03%). Most terpenes responded similarly to treatments and storage. Immediately after treatment with 1.0 μL/L O3 for 1, 2, or 4 days, total terpene concentrations were 45%, 85%, and 87% greater than concentrations in non-treated controls. Caryophyllene, beta-pinene, and sabinene did not increase in response to the O3 treatment unlike the other terpenes. 1-MCP reduced terpene concentrations by an average of 18%. O3 treatments also stimulated stress volatile production. Ethanol headspace concentrations were 8-, 21-, and 43-times greater than the nontreated controls immediately following treatments with 0.3 nL/L O3 for 4 days or 1.0 μL/L O3 for 2 or 4 days, respectively. However, after 8 weeks, no differences among treatments were observed. Hexanal production also was stimulated by all O3 treatments, being 2- to 11-times greater than controls immediately following treatment. 1-MCP reduced O3-stimulated ethanol and hexanal production by 23% and 8%, respectively.

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RODRIGUEZ-ROMO, LUIS A., and AHMED E. YOUSEF. "Inactivation of Salmonella enterica Serovar Enteritidis on Shell Eggs by Ozone and UV Radiation." Journal of Food Protection 68, no. 4 (April 1, 2005): 711–17. http://dx.doi.org/10.4315/0362-028x-68.4.711.

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The presence of Salmonella enterica serovar Enteritidis in shell eggs has serious public health implications. Several treatments have been developed to control Salmonella on eggs with mixed results. Currently, there is a need for time-saving, economical, and effective egg sanitization treatments. In this study, shell eggs externally contaminated with Salmonella (8.0 × 105 to 4.0 × 106 CFU/g of eggshell) were treated with gaseous ozone (O3) at 0 to 15 lb/in2 gauge for 0 to 20 min. In other experiments, contaminated shell eggs were exposed to UV radiation at 100 to 2,500 μW/cm2 for 0 to 5 min. Treatment combination included exposing contaminated eggs to UV (1,500 to 2,500 μW/cm2) for 1 min, followed by ozone at 5 lb/in2 gauge for 1 min. Eggs that were (i) noncontaminated and untreated, (ii) contaminated and untreated, and (iii) contaminated and treated with air were used as controls. Results indicated that treating shell eggs with ozone or UV, separately or in combination, significantly (P < 0.05) reduced Salmonella on shell eggs. For example, contaminated eggs treated with ozone at 4 to 8°C and 15 lb/in2 gauge for 10 min or with UV (1,500 to 2,500 μW/cm2) at 22 to 25°C for 5 min produced 5.9- or 4.3-log microbial reductions or more, respectively, when compared with contaminated untreated controls. Combinations including UV followed by ozone treatment resulted in synergistic inactivation of Salmonella by 4.6 log units or more in about 2 min of total treatment time. Salmonella was effectively inactivated on shell eggs in a short time and at low temperature with the use of a combination of UV radiation and ozone.

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BIALKA, KATHERINE L., and ALI DEMIRCI. "Utilization of Gaseous Ozone for the Decontamination of Escherichia coli O157:H7 and Salmonella on Raspberries and Strawberries." Journal of Food Protection 70, no. 5 (May 1, 2007): 1093–98. http://dx.doi.org/10.4315/0362-028x-70.5.1093.

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Each year in the United States, there are approximately 76 million foodborne illnesses, and fresh produce is the second most common vehicle for such illnesses. Before going to market, small fruits are not washed or treated in any manner to extend their shelf life. Washing alone is not a viable option, and the use of novel technologies should be investigated. One such technology is ozone treatment, which has been used with drinking water since the late 19th century. The efficacy of gaseous ozone for killing pathogens on strawberries and raspberries, which were used as a model for small fruits, was investigated in this study. Strawberries and raspberries were artificially contaminated with five strains of Escherichia coli O157:H7 and Salmonella enterica. Fruits were treated with four ozone treatments: (i) continuous ozone flow (5%, wt/wt) for 2, 4, 8, 16, 32, and 64 min; (ii) pressurized ozone (83 kPa) for 2, 4, 8, 16, 32, and 64 min; (iii) continuous ozone (64 min) followed by pressurized ozone (64 min); and (iv) vacuum followed by 64 min of pressurized ozone. Maximum reductions for both strawberries and raspberries were achieved with the third treatment scenario. On strawberries, 2.60- and 2.96-log reductions were achieved for Salmonella and E. coli O157:H7, respectively. For raspberries, 3.55- and 3.75-log reductions were achieved for Salmonella and E. coli O157:H7, respectively. These results indicate that gaseous ozone should be a useful treatment for decontamination of small fruits.

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Wan, Xing, Yang Ping, and Jun Li. "Effect of Ozone Treatment on the Properties of Oil Palm Empty Fruit Bunch Sulfonated Chemi-Mechanical Pulp." Forests 12, no. 8 (August 13, 2021): 1085. http://dx.doi.org/10.3390/f12081085.

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Oil palm empty fruit bunch (EFB) as an abundant waste material can be utilized for pulp production to alleviate the shortage of raw materials in the paper industry. Sulfonated chemi-mechanical pulp (SCMP) has great potential in paper making industry. However, its poor performance due to the high surface lignin content limits its application. In this study, we used EFB as raw material to produce SCMP and systematically studied the effect of ozone treatment on pulp properties. Results show that the surface structure and morphology of fibers exhibited distinct differences under different ozone dosage treatments. Compared to the control, the content of surface lignin of pulps was reduced by 2.56%, 4.64%, 13.24% and 25.24% when ozone consumption was 1, 3, 5 and 7 wt%, respectively. Meanwhile, the treated pulp had a lower drainability at the same refining energy level. Moreover, the physical and optical properties of handsheets were improved significantly after ozone treatment. Ozone treatment is a very efficient way to improve the performance of SCMP. Additionally, this method avoids complicated processes and chemical consumption. Therefore, as an effective, environmentally friendly and low-cost treatment method, ozone treatment can improve the performance of EFB SCMP and thus provide a high-quality pulp resource.

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Morozzi, G., A. Savino, R. Conti, and R. Manenti. "The fate of some organic pollutants in wastewater during ozone and Ozone‐GAC adsorption treatments." Journal of Environmental Science and Health . Part A: Environmental Science and Engineering 21, no. 6 (August 1986): 523–36. http://dx.doi.org/10.1080/10934528609375309.

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UNAL, RAGIP, JIN-GAB KIM, and AHMED E. YOUSEF. "Inactivation of Escherichia coli O157:H7, Listeria monocytogenes, and Lactobacillus leichmannii by Combinations of Ozone and Pulsed Electric Field." Journal of Food Protection 64, no. 6 (June 1, 2001): 777–82. http://dx.doi.org/10.4315/0362-028x-64.6.777.

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Pulsed electric field (PEF) and ozone technologies are nonthermal processing methods with potential applications in the food industry. This research was performed to explore the potential synergy between ozone and PEF treatments against selected foodborne bacteria. Cells of Lactobacillus leichmannii ATCC 4797, Escherichia coli O157:H7 ATCC 35150, and Listeria monocytogenes Scott A were suspended in 0.1% NaCl and treated with ozone, PEF, and ozone plus PEF. Cells were treated with 0.25 to 1.00 μg of ozone per ml of cell suspension, PEF at 10 to 30 kV/cm, and selected combinations of ozone and PEF. Synergy between ozone and PEF varied with the treatment level and the bacterium treated. L. leichmannii treated with PEF (20 kV/cm) after exposure to 0.75 and 1.00 μg/ml of ozone was inactivated by 7.1 and 7.2 log10 CFU/ml, respectively; however, ozone at 0.75 and 1.00 μg/ml and PEF at 20 kV/cm inactivated 2.2, 3.6, and 1.3 log10 CFU/ml, respectively. Similarly, ozone at 0.5 and 0.75 μg/ml inactivated 0.5 and 1.8 log10 CFU/ml of E. coli, PEF at 15 kV/cm inactivated 1.8 log10 CFU/ml, and ozone at 0.5 and 0.75 μg/ml followed by PEF (15 kV/cm) inactivated 2.9 and 3.6 log10 CFU/ml, respectively. Populations of L. monocytogenes decreased 0.1, 0.5, 3.0, 3.9, and 0.8 log10 CFU/ml when treated with 0.25, 0.5, 0.75, and 1.0 μg/ml of ozone and PEF (15 kV/cm), respectively; however, when the bacterium was treated with 15 kV/cm, after exposure to 0.25, 0.5, and 0.75 μg/ml of ozone, 1.7, 2.0, and 3.9 log10 CFU/ml were killed, respectively. In conclusion, exposure of L. leichmannii, E. coli, and L. monocytogenes to ozone followed by the PEF treatment showed a synergistic bactericidal effect. This synergy was most apparent with mild doses of ozone against L. leichmannii.

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Muto, Mario, Francesco Giurazza, Ricardo Pimentel Silva, and Gianluigi Guarnieri. "Rational approach, technique and selection criteria treating lumbar disk herniations by oxygen–ozone therapy." Interventional Neuroradiology 22, no. 6 (August 6, 2016): 736–40. http://dx.doi.org/10.1177/1591019916659266.

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Radicular lumbar back pain is an important public health problem not yet benefiting from a unequivocal treatment approach. Medical and physical therapies represent the first solution; however, when these fail, the second therapeutic step is still controversial and mini-invasive treatments may play an important role. In these cases oxygen–ozone therapy has been proved to be a very safe and effective option that is widely used with different modalities. This paper, by reviewing oxygen–ozone therapy literature data, aims to describe the rationale of oxygen–ozone therapy for the treatment of lumbar disk herniations, propose an effective procedural technique and clarify patient selection criteria; furthermore, complications and follow-up management are also considered.

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Khushvakova, Nilufar Jurakulovna, and Nargiza Orzuevna Khamrakulova. "LOCAL COMPLEX TREATMENT EXPERIENCE FOR PATIENTS WITH CHRONIC PURULENT OTITIS MEDIA." CBU International Conference Proceedings 3 (September 19, 2015): 444–46. http://dx.doi.org/10.12955/cbup.v3.636.

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In this article, we have analyzed the results of the application of the combined solution of decasan and ozone-oxygen mixture, as a local conservative treatment, for 135 patients with acute exacerbation of chronic purulent medial otitis (CPOM). Its use increases the effectiveness of treatment and reduces time. The study of long-term results has shown persistence of sustained remission in 91,4% of patients.A comparative analysis of traditional treatments and topical administration of antiseptic 0.002 % solution of “Dekasan” (dekametansin), in combination with ozone-oxygen mixture in patients with suppurative otitis media, was carried out. The analysis was conducted using ozone-oxygen mixture along with a local irrigation of middle ear cavity with “Dekasan.”

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SADEGHI, REZA, ESMAEEL SEYEDABADI, and RAHIL MIRABI MOGHADDAM. "Evaluation of Microwave and Ozone Disinfections on the Color Characteristics of Iranian Export Raisins Through an Image Processing Technique." Journal of Food Protection 82, no. 12 (November 13, 2019): 2080–87. http://dx.doi.org/10.4315/0362-028x.jfp-19-296.

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ABSTRACT Raisins are one of the most important Iranian export products but are threatened by various storage pests. Because of the disadvantages of fumigants, we evaluated alternative microwave and ozone methods for their disinfection and the side effects on raisin qualities. To perform microwave disinfection, the studied raisin samples were exposed to microwave powers of 450, 720, and 900 W for 20, 30, 40, and 50 s. Also, ozone treatments included various combinations of ozone concentrations (2, 3, and 5 ppm) and exposure times (15, 30, 45, 60, and 90 min). An image processing technique was implemented to determine the color changes of raisins in terms of lightness, redness, yellowness, total color difference, chroma, and hue angle. The results revealed that increasing the microwave power and exposure time might lead to further changes of the previously mentioned color characteristics. Compared with the microwave treatments, ozone treatments had fewer effects on those features. Generally, microwave and ozone methods could successfully disinfect Oryzaephilus surinamensis in raisins, with acceptable changes in all the color characteristics. Hence, the previously mentioned methods are proposed as alternative chemical fumigants. HIGHLIGHTS

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Heleno, Fernanda F., Maria Eliana LR de Queiroz, Lêda RA Faroni, Antônio A. Neves, André F. de Oliveira, Luiz PL Costa, and Gustavo G. Pimenta. "Aqueous ozone solutions for pesticide removal from potatoes." Food Science and Technology International 22, no. 8 (July 9, 2016): 752–58. http://dx.doi.org/10.1177/1082013216651179.

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The presence of pesticide residues in potatoes is of concern because of the potential impact to human health due to the high consumption of this vegetable. In this study, aqueous solutions with and without ozone saturation as postharvest wash treatment at pH 4.0, 7.0, and 9.0 were tested to remove chlorothalonil from potatoes. The method used for pesticide analysis has been validated, presenting recovery values of 94–103%, with variations in the repeatability coefficients of ≤10.6%, and a quantification limit of 0.05 mg kg−1. Regardless of pH, treatment with aqueous ozone solutions removed 70–76% of the pesticide present in the potato. In the no-ozone treatments, the percentage average removal of chlorothalonil residues in potatoes was only 36%. Over 24 days of storage, the quality of potatoes washed with aqueous ozone solutions was not significantly different from those washed with pure water.

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Noites, Rita, Cidália Pina-Vaz, Rita Rocha, Manuel Fontes Carvalho, Acácio Gonçalves, and Irene Pina-vaz. "Synergistic Antimicrobial Action of Chlorhexidine and Ozone in Endodontic Treatment." BioMed Research International 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/592423.

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Objectives. The aim of this study was to determine whether irrigation with sodium hypochlorite, chlorhexidine, and ozone gas, alone or in combination, were effective againstEnterococcus faecalisandCandida albicans; these are microorganisms frequently isolated from teeth with periapical lesions resistant to endodontic treatment.Material and Methods. 220 single root teeth, recently extracted, were inoculated withCandida albicansandEnterococcus faecalis. The formulations tested were sodium hypochlorite at 1, 3, and 5% chlorhexidine at 0.2% and 2% and ozone gas applied for different periods of time. The combination of sodium hypochlorite at 5% and chlorhexidine at 2%, with gaseous ozone, were also assessed. For the most active treatments the mechanism of action was assessed through flow cytometry.Results. Sodium hypochlorite, chlorhexidine, and gaseous ozone alone were ineffective in completely eliminating the microorganisms. The association of chlorhexidine at 2% followed by ozone gas for 24 seconds promoted the complete elimination ofCandida albicansandEnterococcus faecalis. Flow cytometry shows that ozone and chlorhexidine act differently, which could explain its synergic activity.Conclusions. This new disinfection protocol, combining irrigation with chlorhexidine at 2% and ozone gas for 24 seconds, may be advantageous when treating infected root canals.

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Yamamoto, Satoshi, Chizuru Koga, Hiroyoshi Hosomura, and Takayuki Okayama. "Ozone Treatments of Bleached Kraft Pulp and Waste Paper." JAPAN TAPPI JOURNAL 55, no. 4 (2001): 506–13. http://dx.doi.org/10.2524/jtappij.55.506.

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Brodowska, Agnieszka, Agnieszka Nowak, Alina Kondratiuk-Janyska, Marcin Piątkowski, and Krzysztof Śmigielski. "Modelling the Ozone-Based Treatments for Inactivation of Microorganisms." International Journal of Environmental Research and Public Health 14, no. 10 (October 9, 2017): 1196. http://dx.doi.org/10.3390/ijerph14101196.

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Karimi, Mohammad, Seyed Mansour Bidoki, and Ali Benvidi. "Novel Ti/TiHx/SnO2-Sb2O5-NiO-CNT electrode for electrochemical Ozone Generation for degradation of toxic textile azo dyes." Environmental Engineering Research 27, no. 3 (April 8, 2021): 200429–0. http://dx.doi.org/10.4491/eer.2020.429.

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Water pollution control and the development of clean technologies for water, air and soil treatments comprise one of the most important challenges for modern society. Ozone is known as a strong and clean oxidizing agent that can be used for water and wastewater treatment. In this research, a novel Ti/TiHx/SnO2-Sb2O5-NiO-CNT modified titanium electrode containing carbon nanotubes (CNT) was fabricated for in-situ ozone generation. The electrode was characterized using SEM, XRD and LSV techniques. CNT presence caused an increase in ozone generation efficiency leading to the higher concentrations of dissolved ozone in water compared to the recently reported researchers. Ozone generation at the surface of the electrode was determined using the standard indigo method. Electrochemical ozone was further used in degradation of C.I. Reactive red 195 (RR 195). It was found that the modified electrode could degrade 96% of RR 195 from initial concentration of 300 mg∙L-1 in 30 min under current density of 20 mA∙cm-2. COD removal was also measured as high as 60 percent.

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Suprapto, Dodik, Lilik Eka Radiati, Chanif Mahdi, and Herly Evanuarini. "Physicochemical Quality and Microbial Activity of Dairy Milk with Ozonation." Jurnal Ilmu dan Teknologi Hasil Ternak 16, no. 2 (July 1, 2021): 117–24. http://dx.doi.org/10.21776/ub.jitek.2021.016.02.5.

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The aim of this study was to evaluate the effect of ozone exposure to the physicochemical and microbial activity in dairy milk. The research material was fresh milk from dairy cows and ozone was produced by commercial ozone generator brand HANACO, production capacity up to 0.702 mg/min at 24-27ºC with oxygen source coming from ambient air in the nature. The experiment used ozone treatments for 0, 10, 20, and 30 min with variable of analysis such as density, protein, fat, electrical resistance, total plate count, and malondialdehyde which was analyzed using One Way Annova. The results showed that ozone treatment had no significant effect on the density, protein and fat in dairy milk, but had significant (P<0.05) effect on the electrical resistance, total plate count, and production of malondialdehyde. Electrical resistance and malondialdehyde were increased, while total plate count was decreased over time with the ozone exposure. Ozonation is possible to reducing yield loss on milk production that is caused by microbial activity without changing the physicochemical properties of dairy milk.

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Clavo, Bernardino, Norberto Santana-Rodriguez, Pedro Llontop, Dominga Gutierrez, Daniel Ceballos, Charlin Méndez, Gloria Rovira, et al. "Ozone Therapy in the Management of Persistent Radiation-Induced Rectal Bleeding in Prostate Cancer Patients." Evidence-Based Complementary and Alternative Medicine 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/480369.

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Introduction. Persistent radiation-induced proctitis and rectal bleeding are debilitating complications with limited therapeutic options. We present our experience with ozone therapy in the management of such refractory rectal bleeding.Methods. Patients (n=12) previously irradiated for prostate cancer with persistent or severe rectal bleeding without response to conventional treatment were enrolled to receive ozone therapy via rectal insufflations and/or topical application of ozonized-oil. Ten (83%) patients had Grade 3 or Grade 4 toxicity. Median follow-up after ozone therapy was 104 months (range: 52–119).Results. Following ozone therapy, the median grade of toxicity improved from 3 to 1 (p<0.001) and the number of endoscopy treatments from 37 to 4 (p=0.032). Hemoglobin levels changed from 11.1 (7–14) g/dL to 13 (10–15) g/dL, before and after ozone therapy, respectively (p=0.008). Ozone therapy was well tolerated and no adverse effects were noted, except soft and temporary flatulence for some hours after each session.Conclusions. Ozone therapy was effective in radiation-induced rectal bleeding in prostate cancer patients without serious adverse events. It proved useful in the management of rectal bleeding and merits further evaluation.

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García-Orozco, V. M., C. E. Barrera-Díaz, G. Roa-Morales, and Ivonne Linares-Hernández. "A Comparative Electrochemical-Ozone Treatment for Removal of Phenolphthalein." Journal of Chemistry 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8105128.

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The degradation of aqueous solutions containing phenolphthalein was carried out using ozone and electrochemical processes; the two different treatments were performed for 60 min at pH 3, pH 7, and pH 9. The electrochemical oxidation using boron-doped diamond electrodes processes was carried out using three current density values: 3.11 mA·cm−2, 6.22 mA·cm−2, and 9.33 mA·cm−2, whereas the ozone dose was constantly supplied at 5±0.5 mgL−1. An optimal degradation condition for the ozonation treatment is at alkaline pH, while the electrochemical treatment works better at acidic pH. The electrochemical process is twice better compared with ozonation.

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Burkey, Kent, Ripley Tisdale, Richard Zobel, Samuel Ray, and Walter Pursley. "Interactive Effects of Elevated Ozone and Temperature on Growth and Yield of Soybean (Glycine max (L.) Merr.) under Field Conditions." Agronomy 10, no. 11 (November 17, 2020): 1803. http://dx.doi.org/10.3390/agronomy10111803.

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Elevated ozone and rising temperature are both factors in climate change, but they are difficult to study in combination due to exposure system requirements. We developed and deployed an air exclusion exposure system to treat soybean (Glycine max (L.) Merr.) cultivar “Jake” with season-long combinations of sub-ambient ozone (18 ppb, 12 h mean), elevated ozone (66 ppb, 12 h mean), and elevated temperature (+3.5 °C daytime, +2.4 °C nighttime) in irrigated field plots. Warming caused a shift in biomass partitioning from reproductive tissues into stems and petioles at mid-season that resulted in a significant 25% reduction in final seed yield and a significant reduction in harvest index. The elevated ozone treatment delayed mid-season biomass production, and final seed yield was reduced by a non-significant 2%. However, there were significant underlying effects of elevated ozone on seed production. The non-significant impact of ozone on seed yield of cultivar “Jake” resulted from significant increases in pod number (+16%) and seed number (+18%) that were offset by a significant reduction in seed size (−16%). No evidence of significant warming–ozone interactions was found in biomass or seed yield responses. In general, significant impacts of the individual warming or ozone treatments were found to be additive.

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Cheng, Xiaoliang, Honglan Shi, Craig D. Adams, Terry Timmons, and Yinfa Ma. "Effects of oxidative and physical treatments on inactivation of Cylindrospermopsis raciborskii and removal of cylindrospermopsin." Water Science and Technology 60, no. 3 (July 1, 2009): 689–97. http://dx.doi.org/10.2166/wst.2009.385.

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The presence of toxic cyanobacterial blooms (or blue-green algae) in water bodies used either as drinking water or for recreational purposes may present serious health risks for the human population. In this study, the removal of the chemical toxin, cylindrospermopsin, via free chlorine, chlorine dioxide, monochloramine, permanganate, ozone, and UV irradiation was studied. Ozone and free chlorine were found to be highly effective for cylindrospermopsion removal while the other disinfectants were ineffective. Ozone and free chlorine were also determined to be highly effective for the inactivation of the cyanobacteria, Cylindrospermopsis raciborskii, at typical water treatment exposures, chlorine dioxide, monochloramine, and permanganate were only marginally effective at inactivation of Cylindrospermopsis raciborskii.

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Kłonica, Mariusz, and Józef Kuczmaszewski. "Modification of 316L Steel Surface in Ozone Atmosphere." New Trends in Production Engineering 1, no. 1 (October 1, 2018): 695–701. http://dx.doi.org/10.2478/ntpe-2018-0088.

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Abstract The study reported in this paper was undertaken to assess whether certain ecologically-disastrous surface treatments, such as chemical and electrochemical treatment could be replaced with ozonation. The proposed technology is both ecologically-sound and relatively inexpensive. The research works were conducted on 316L steel substrates and involved photoelectron spectroscopy (XPS). The band positions on the review spectrum provide the basis for the qualitative identification of the atoms forming the surface layer, whereas their intensity – data for the calculation of the total concentration of these atoms in the analysed layer. High resolution spectra are used to determine the type of chemical bonds – based on the characteristic numbers of chemical shift. The results of tests on the state of surface layer energy of 316L steel substrate following ozone treatment are also presented. The conducted tests and the analysis of the obtained results indicate that ozone treatment effectively removes atmospheric carbon contaminants off the specimen surface. The test results show a decrease in atmospheric carbon on samples after ozone treatment compared to untreated samples. Moreover, results show an increase in the value of the free surface energy in specimens subjected to ozone treatment.

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Aldeguer Esquerdo, Alejandro, Pedro José Varo Galvañ, Irene Sentana Gadea, and Daniel Prats Rico. "Activated Carbon and Ozone to Reduce Simazine in Water." Water 12, no. 10 (October 17, 2020): 2900. http://dx.doi.org/10.3390/w12102900.

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In this study, the reduction of the pesticide simazine at an initial concentration of 0.7 mg L−1 in water has been investigated using two different technologies: adsorption with powdered and granulated activated carbon, advanced oxidation processes with ozone and finally, the combination of both technologies. The results obtained for a carbon dose of 16 mg L−1 show that powdered activated carbon, with contact times of 60 min, obtained 81% of reduction and in 24 h 92%, while granulated activated carbon at 60 min obtained a reduction of 2%, rising to 34% after 24 h of contact time. Therefore, powdered activated carbon achieves better reductions compared to granulated; when ozone was applied at a dose of 19.7 mg L−1, with a reaction time of 18 min, a reduction of 93% was obtained, achieving a better reduction in less time than with adsorption treatments; however, during oxidation, by-products of simazine were produced. In the combined treatments, with the same doses of carbon and ozone mentioned above, the treatment that starts with ozone followed by activated carbon powder is recommended due to the adsorption in the last phase reaching a 90% reduction of the simazine and its by-products in 38 min of time.

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Ng, Isaac, Holly Shorney-Darby, Jumeng Zheng, and Gilbert Galjaard. "Ceramic membranes for reuse." Water Practice and Technology 13, no. 2 (June 1, 2018): 414–23. http://dx.doi.org/10.2166/wpt.2018.053.

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Abstract Ceramic membranes are being considered for reuse applications due to their durability and the ability to use strong chemicals to clean the membranes. Some pilot evaluations of different pre-treatments to ceramic membranes have been completed, and more are underway. It is clear that membranes can perform well when the pre-treatment is optimized. This could be pre-coagulation, perhaps with pre-chlorination. If ozone can be used to allow a residual on the membrane surface, then extremely high fluxes can be achieved (e.g., 300 lmh). More study is needed on the benefits of ozone on the water quality when ceramic membranes are used for reuse treatment. With a thorough understanding through continued research, perhaps ozone and ceramic microfiltration could be the basis for some future reuse applications.

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Journal articles on the topic 'Ozone treatments'

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