Sterilization effects of UV laser irradiation on Bacillus atrophaeus spore viability, structure, and proteins

The Analyst ◽  
2021 ◽  
Author(s):  
My-Chi Thi Nguyen ◽  
Huu-Quang Nguyen ◽  
Hanbyeol Jang ◽  
Sojung Noh ◽  
Seong-Yeon Lee ◽  
...  
Keyword(s):  
Public Health ◽  
Laser Irradiation ◽  
Extreme Environments ◽  
Toxic Chemicals ◽  
Bacillus Species ◽  
Uv Laser ◽  
Bacillus Atrophaeus ◽  
Spore Viability ◽  
Bacillus Spores

Bacillus spores are highly resistant to toxic chemicals and extreme environments. Because some Bacillus species threaten public health, spore inactivation techniques have been intensively investigated. We exposed Bacillus atrophaeus spores...

Studies on the mechanism of printing film-coated tablets containing titanium dioxide in the film by using UV laser irradiation

2009 ◽  
Vol 00 (00) ◽  
pp. 090915102728058-8
Author(s):  
Yoshiteru Kato ◽  
Yasuhiko Nakashima ◽  
Naoki Shino ◽  
Koichi Sasaki ◽  
Akihiro Hosokawa ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Laser Irradiation ◽  
Uv Laser

Three Clusters of Bacillus Pseudobacteremia Related to a Radiometric Blood Culture Analyzer

1984 ◽  
Vol 5 (2) ◽  
pp. 71-74 ◽  
Author(s):  
Inge Gurevich ◽  
Patricia Tafuro ◽  
Sharon P. Krystofiak ◽  
Robert D. Kalter ◽  
Burke A. Cunha
Keyword(s):  
Blood Culture ◽  
Clinical Signs ◽  
Blood Cultures ◽  
Bacillus Species ◽  
Common Source ◽  
Air Conditioner ◽  
Close Proximity ◽  
Bacillus Spp ◽  
Multiple Blood ◽  
Bacillus Spores

AbstractDuring a ten-month period from September 1981 to July 1982 three episodes of pseudobacteremia due to Bacillus species occurred at this 550-bed institution. The first involved eight isolates, the second 11, and the third seven isolates of the organism, all with the same antibiogram.The patients involved did not exhibit clinical signs of septicemia, and in only one case was more than one specimen per patient positive when multiple blood samples were obtained. Occasional blood cultures of Bacillus species identified in between clusters revealed a different antibiogram.Extensive epidemiologic investigation of patient locations, phlebotomists, and time of cultures yielded no common source. Components involved in the transport and processing of blood cultures, including the radiometric blood culture processor, were also sampled but without recovery of the organism. After the last episode, a layer of dust was noted inside the machine, and culture of this dust grew Bacillus spp. with the same antibiogram as those found in the blood cultures. The filter from an air conditioning unit in close proximity to the machine grew several species of Bacillus.It is presumed that Bacillus spores in the dust were introduced into the blood culture bottles following the heat sterilization of the gas sampling (inoculation/removal) needles.Modification of the cover of the machine was undertaken to prevent access of dust bearing microbes to the inside of the machine. In addition, maintenance now includes regular disinfection/cleaning of the “floor” of the machine, and more frequent changes of the air conditioner filter.

Microcrystal Structures in Titanium Oxide Films Produced by Pulsed UV-Laser Irradiation

2001 ◽  
Vol 40 (Part 2, No. 10A) ◽  
pp. L1054-L1057 ◽  
Author(s):  
Yo Ichikawa ◽  
Kentaro Setsune ◽  
Syun-ichiro Kawashima ◽  
Koichi Kugimiya
Keyword(s):  
Laser Irradiation ◽  
Titanium Oxide ◽  
Oxide Films ◽  
Uv Laser ◽  
Titanium Oxide Films

Observation of liquid carbon on diamond films under pulsed IR and UV laser irradiation

1996 ◽  
Vol 53 (2) ◽  
pp. 543-546 ◽  
Author(s):  
P. Tosin ◽  
W. Lüthy ◽  
H. P. Weber
Keyword(s):  
Laser Irradiation ◽  
Diamond Films ◽  
Uv Laser ◽  
Liquid Carbon

Transient 210-nm absorption in fused silica induced by high-power UV laser irradiation

1991 ◽  
Vol 16 (12) ◽  
pp. 940 ◽  
Author(s):  
Norbert Leclerc ◽  
Stephan Thomas ◽  
Heinz Fabian ◽  
Christoph Pfleiderer ◽  
Hermine Hitzler ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
High Power ◽  
Fused Silica ◽  
Uv Laser

Direct observation of S+ and SF+ ions resulting from the IR+UV laser irradiation of SF6 molecules

2000 ◽  
Vol 320 (5-6) ◽  
pp. 594-600 ◽  
Author(s):  
A.V. Dem'yanenko ◽  
V.N. Lokhman ◽  
D.D. Ogurok ◽  
E.A. Ryabov ◽  
V.S. Letokhov
Keyword(s):  
Laser Irradiation ◽  
Direct Observation ◽  
Uv Laser

Inactivation ofBacillusspores in decontamination wash down wastewater using chlorine bleach solution

2014 ◽  
Vol 41 (1) ◽  
pp. 40-47
Author(s):  
Nur Muhammad ◽  
Vicente J. Gallardo ◽  
Donald A. Schupp ◽  
E. Radha Krishnan ◽  
K. Scott Minamyer ◽  
...  
Keyword(s):  
Bacillus Anthracis ◽  
Sodium Hypochlorite ◽  
Room Temperature ◽  
Pilot Scale ◽  
Bacillus Atrophaeus ◽  
National Response ◽  
Bacillus Anthracis Spores ◽  
Response Team ◽  
Bacillus Spores ◽  
Chlorine Bleach

Bacillus anthracis spores are highly resistant to disinfection. The effectiveness of sodium hypochlorite (bleach) solution for the inactivation of Bacillus atrophaeus subspecies globigii spores (a surrogate for Bacillus anthracis) in wash down wastewater was evaluated by a series of bench-scale and pilot-scale experiments. The wastewater was generated from a simulated decontamination of interior laboratory surfaces and personal protective equipment. A concentration of approximately 5% (v/v) bleach solution was adequate for a ≥7 log10inactivation of Bacillus spores spiked in wastewater after 10 min of contact time at room temperature. This sodium hypochlorite dose is less than the U.S. National Response Team-recommended formulation of 10% (v/v) bleach solution with 10% (v/v) vinegar. For the wash down waters evaluated, the addition of vinegar was not required. Inactivation of Bacillus spores was faster when a detergent was added to the wash down waters tested.

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