THE EFFECT OF ANTIOXIDANTS AND PH ON PHOTOOXIDATIVE STRESS WITH METHYLENE BLUE OF E. COLI, S. AUREUS AND C. ALBICANS

Önder İDİL; Cihan DARCAN

doi:https://doi.org/10.18036/estubtdc.632471

Article Details

THE EFFECT OF ANTIOXIDANTS AND PH ON PHOTOOXIDATIVE STRESS WITH METHYLENE BLUE OF E. COLI, S. AUREUS AND C. ALBICANS

Authors:

Önder İDİL | Cihan DARCAN

Publisher:

Eskisehir Technical University

Main Topics:

Human physiology

Journal:

Eskişehir Teknik Üniversitesi Bilim ve Teknoloji Dergisi - C Yaşam Bilimleri Ve Biyoteknoloji 2021 Vol.10 Issue 1, pp.69-78

Document Type:

Article

Publication Date:

1/2021

Document Language:

English

Document ID (Org No.):

2000417412

pISSN:

2667-4203

DOI:

https://doi.org/10.18036/estubtdc.632471

Abstract:

 


In this study, the effect of photooxidative stress on different microorganism groups (Gram positive, Gram negative and Eukaryote) and the role of pH and antioxidants on this effect were investigated. The study was performed under 3 day light fluorescent lamps (total 4950 lux) in phosphate buffer (5.0, 6.0, 7.0, and 8.0) at different pH values. As a result, the colony counts of Escherichia coli, Sthapylococcus aureus and Candida albicans were not decreased under photooxidative stress according to the starting number at pH 5.0 and 6.0. While E. coli and S. aureus at pH 8.0 were decreased 3 log and 3.38 log, it were decreased 1.27 and 1.56 log at pH 7.0. Similarly, C. albicans decreased 0.35 log at pH 7.0 and 0.75 log at pH 8.0. T99 value at pH 8.0 was determined as 4.0 hours for E. coli, 3.5 hours for S. aureus, and 15.7 hours for C. albicans (p < 0.05). When the effects of NaCl, Mannitol and ascorbic acid on photooxidative stressed microorganisms were examined, it was determined that NaCl protected microorganisms against photooxidative stress, and ascorbic acid and mannitol changed their effect according to microorganism. In conclusion, photooxidative stress were found to be more effective to Gram positive than Gram negative bacteria, more effective to bacteria than eukaryotes. The effectiveness of photooxidative stress has been determined to be quite high at alkaline pH. It was also determined that there is a direct relationship between the effect of photooxidative stress and pH and osmolarity. It has been found that Ascorbic acid and Mannitol are not protective against photooxidative stress in Gram-positive and eukaryotic cell. Yet the cause of this condition is unknown.

.

 


In this study, the effects of photooxidative stress on
different microorganism groups (gram positive, gram negative and eukaryote) and
the role of pH and antioxidants on this effect were investigated. The study was
performed under 3 day light fluorescent lamps (total 4950 lux) in phosphate
buffer (5.0, 6.0, 7.0, and 8.0) at different pH values. As a result, the colony counts of Escherichia coli, Sthapylococcus aureus
and Candida albicans were not
decreased under photooxidative stress according to the starting number at pH
5.0 and 6.0. while E. coli and S. aureus
at pH 8.0 were decreased 3 log and 3.38 log, 
it were decreased 1.27 and 1.56 log at pH 7.0. Similarly, C.
albicans decreased 0,35 log at pH 7.0 and 0.75 log at pH 8.0. T99
value at pH 8.0 was determined as 4.0 hours for E. coli, 3.5 hours for S.
aureus, and 15.7 hours for C.
albicans (p < 0.05). When the effects of NaCl, Mannitol and ascorbic
acid on photooxidative stressed microorganisms were examined, it was determined
that NaCl protected microorganisms against photooxidative stress, and ascorbic
acid and mannitol changed their effect according to microorganism. In
conclusion, photooxidative stress were found to be more effective to Gram
positive than gram negative bacteria, more effective to bacteria than
eukaryotes. The effectiveness of photooxidative stress has been determined to be quite
high at alkaline pH. It was also determined that there is a direct relationship
between the effect of photooxidative stress and pH and osmolarity. It has been found that
Ascorbic acid and Mannitol are not protective against photooxidative stress in
Gram-positive and eukaryotic cell. Yet the cause of this condition is unknown.


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Article Details

THE EFFECT OF ANTIOXIDANTS AND PH ON PHOTOOXIDATIVE STRESS WITH METHYLENE BLUE OF E. COLI, S. AUREUS AND C. ALBICANS

Authors: Önder İDİL | Cihan DARCAN

Publisher: Eskisehir Technical University

Main Topics: Human physiology

Journal: Eskişehir Teknik Üniversitesi Bilim ve Teknoloji Dergisi - C Yaşam Bilimleri Ve Biyoteknoloji 2021 Vol.10 Issue 1, pp.69-78

Document Type: Article

Publication Date: 1/2021

Document Language: English

Document ID (Org No.): 2000417412

pISSN: 2667-4203

DOI: https://doi.org/10.18036/estubtdc.632471

Issues

Authors:

Önder İDİL | Cihan DARCAN

Publisher:

Eskisehir Technical University

Main Topics:

Human physiology

Journal:

Eskişehir Teknik Üniversitesi Bilim ve Teknoloji Dergisi - C Yaşam Bilimleri Ve Biyoteknoloji 2021 Vol.10 Issue 1, pp.69-78

Document Type:

Article

Publication Date:

1/2021

Document Language:

English

Document ID (Org No.):

2000417412

pISSN:

2667-4203

DOI:

https://doi.org/10.18036/estubtdc.632471