Characteristics and disinfection byproducts formation potential of dissolved organic matter released from fast-growing Eucalyptus urophylla leaves

Liu, Lu; Tang, Yankui; Yang, Weiwei; Li, Wenlu; Fang, Bo; Zhong, Yaxuan; Yin, Maozhong; Chen, Yuwei; Yang, Huiyi

doi:10.1016/j.chemosphere.2020.126017

Cited by 7 publications

(4 citation statements)

References 53 publications

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“…They are applied to the skin to prevent mosquito bites. Modern medicine has con rmed that the eucalyptus leaves contain gallic acid, phenols, mellow alcohol, and eucalyptus.The tests of gallic acid in vitro extracted from Eucalyptus Urophylla leaves inhibited Staphylococcus aureus, Pseudomonas aeruginosa, pneumococcus, typhoid and paratyphoid bacillus, which proved that eucalyptus leaves have good antibacterial and anti-in ammatory effects [12,13]. Therefore, this study aimed to investigate the effect of Eucalyptus urophylla volatile oil on burn patients for prevention and treatment of concurrent infections.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism of Application of Eucalyptus Volatile oil in Prevention and Treatment of Burn Wound Infections in Vitro

Yang¹,

Huang²,

Gao³

et al. 2020

Preprint

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Objective To investigate working mechanism of Eucalyptus volatile oil on the prevention and treatment of burn wound infections.Methods P.a biofilm model was used to investigate the effect of Eucalyptus volatile oil on bacterial biofilm. The expression of LasI mRNA in P.a was detected by RT-PCR.Results MIC test showed that the volatile oil of Eucalyptus Urophylla in a concentration of 20% or more could exert anti-bacterial effect. However, no zone of inhibition could be observed in the neither high nor low concentration of the Eucalyptus volatile oil. Scanning electron microscopy results showed a significant delay in volatile oil groups when compared with the control group. The expression of LasI mRNA in the volatile oil group was significantly lower than that in the control group. ConclusionAs Chinese medicine, the volatile oil of Eucalyptus Urophylla can affect the proliferation of P.a and biofilm formation by interfering with the expression of LasI, thus achieving the purpose of preventing and treating infection of burn patients.

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Section: Introductionmentioning

confidence: 99%

Study on the Mechanism of Application of Eucalyptus Volatile oil in Prevention and Treatment of Burn Wound Infections in Vitro

Yang¹,

Huang²,

Gao³

et al. 2020

Preprint

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“…5,6 However, this SIL method requires manual spectral interpretation, which will take more time and even lead to some spectra being unresolved. Furthermore, the DOM released from eucalyptus leaves into raw water was identified as mainly consisting of phenols, carbohydrates, and amino acids by nontargeted analysis, 7 which were recognized as potential precursors of THMs during chlorination. However, the study did not investigate the transformation of DOM into unknown DBPs.…”

Section: Introductionmentioning

confidence: 99%

“…A stable isotope labeling (SIL) method was developed to identify trace levels of amino-containing compounds in water via nontargeted analysis, such as dipeptides and natural products, which favors the identification of unknown N-DBPs, like N -chloropeptides and nitrosoamines, in finished water. , However, this SIL method requires manual spectral interpretation, which will take more time and even lead to some spectra being unresolved. Furthermore, the DOM released from eucalyptus leaves into raw water was identified as mainly consisting of phenols, carbohydrates, and amino acids by nontargeted analysis, which were recognized as potential precursors of THMs during chlorination. However, the study did not investigate the transformation of DOM into unknown DBPs.…”

Section: Introductionmentioning

confidence: 99%

Nontargeted Analysis of Coumarins in Source Water and Their Formation of Chlorinated Coumarins as DBPs in Drinking Water

Liu,

Zou,

Pei

et al. 2024

Environ. Sci. Technol.

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Coumarin was detected as one of the most abundant compounds by nontargeted analysis of natural product components in actual water samples prior to disinfection. More importantly, prechlorination of humic acid generated 3-hydroxycoumarin and monohydroxy-monomethyl-substituted coumarin with a total yield of ≤10.1%, which suggested the humic substance in raw water is an important source of coumarins. 7-Hydroxycoumarin, 6-hydroxy-4-methylcoumarin, 6,7-dihydroxycoumarin, and 7-methoxy-4-methylcoumarin were identified in raw water by high-performance liquid chromatography–tandem high-resolution mass spectrometry because only some coumarin standards were commercially available. Their chlorination generated monochlorinated and polychlorinated coumarins, and their structures were confirmed by the synthesized standards. These products could form at various dosages of chlorine and pH levels, and some with a concentration of 600 ng/L can be stable in tap water for days. 3,6,8-Trichloro-7-hydroxycoumarin, 3-chloro-7-methoxy-4-methylcoumarin, and 3,6-dichloro-7-methoxy-4-methylcoumarin were first identified in finished water with concentrations of 0.0670, 78.1, and 14.7 ng/L, respectively, but not in source water, suggesting that they are new DBPs formed during disinfection. The cytotoxicity of 3-chloro-7-methoxy-4-methylcoumarin in CHO-K1 cells was comparable to those of 2,6-dibromo-1,4-benzoquinone and 2,6-dichloro-1,4-benzoquinone in TIC-Tox analyses, suggesting that further investigation of their occurrence and control in drinking water systems is warranted.

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“…As con rmed by modern medicine, eucalyptus leaves contain gallic acid, phenols, mellow alcohol, and Eucalyptol. The tests of gallic acid in vitro extracted from E. urophylla leaves inhibited Staphylococcus aureus, pneumococcus, typhoid, paratyphoid bacillus, and PA; thus, eucalyptus leaves have good antibacterial and anti-in ammatory effects (12,13). Therefore, this study aimed to investigate the effect of E. urophylla volatile oil on patients with burn for preventing and treating concurrent PA infections.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Eucalyptus Volatile Oil Application for Preventing and Treating Pseudomonas Aeruginosa Infection in Vitro

Yang¹,

Huang²,

Huang³

et al. 2020

Preprint

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Background The mechanism of eucalyptus volatile oil application on the prevention and treatment of burn infections caused by Pseudomonas aeruginosa (PA) was need to examined.Methods The effect of eucalyptus volatile oil on bacterial biofilm was investigated using a PA biofilm model. The expression of LasI mRNA in PA was detected by RT-PCR. Results The minimum inhibitory concentration test showed that the volatile oil of Eucalyptus urophylla in 20% concentration or more could exert an antibacterial effect. However, neither high nor low concentration of the eucalyptus volatile oil had a zone of inhibition. In scanning electron microscopy, the volatile oil group exhibited a significant delay compared with the control group. The volatile oil group also had a significantly lower LasI mRNA expression than the control group. Conclusion As a Chinese medicine, the volatile oil of E. urophylla can affect PA proliferation and biofilm formation by interfering with the expression of LasI, thereby successfully preventing and treating burn infection caused by PA.

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Characteristics and disinfection byproducts formation potential of dissolved organic matter released from fast-growing Eucalyptus urophylla leaves

Cited by 7 publications

References 53 publications

Study on the Mechanism of Application of Eucalyptus Volatile oil in Prevention and Treatment of Burn Wound Infections in Vitro

Study on the Mechanism of Application of Eucalyptus Volatile oil in Prevention and Treatment of Burn Wound Infections in Vitro

Nontargeted Analysis of Coumarins in Source Water and Their Formation of Chlorinated Coumarins as DBPs in Drinking Water

Mechanism of Eucalyptus Volatile Oil Application for Preventing and Treating Pseudomonas Aeruginosa Infection in Vitro

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