Involvement of radical species in inactivation of Vibrio parahaemolyticus in saline solutions by direct-current electric treatment

2006 ◽  
Vol 102 (5) ◽  
pp. 457-463 ◽  
Author(s):  
Hiromi Urano ◽  
Hiroshi Ishikawa ◽  
Satoshi Fukuzaki
Keyword(s):  
Direct Current ◽  
Vibrio Parahaemolyticus ◽  
Radical Species ◽  
Electric Treatment ◽  
Saline Solutions

scholarly journals Inactivation of Vibrio parahaemolyticus in Effluent Seawater by Alternating-Current Treatment

2004 ◽  
Vol 70 (3) ◽  
pp. 1833-1835 ◽  
Author(s):  
Jong-Chul Park ◽  
Min Sub Lee ◽  
Dong-Wook Han ◽  
Dong Hee Lee ◽  
Bong Joo Park ◽  
...  
Keyword(s):  
Direct Current ◽  
Vibrio Parahaemolyticus ◽  
Large Scale ◽  
Alternating Current ◽  
Industrial Applications ◽  
Current Treatment ◽  
Electric Treatment ◽  
Chlorine Generation

ABSTRACT Vibrio parahaemolyticus, the cause of gastroenteritis in humans, was inactivated by alternating low-amperage electricity. In this study, the application of alternating low-amperage electric treatment to effluent seawater was investigated for the large-scale disinfection of seawater. This method was able to overcome the problem of chlorine generation that results from treatment with continuous direct current. In conclusion, our results showed that alternating-current treatment inactivates V. parahaemolyticus in effluent seawater while minimizing the generation of chlorine and that this alternating-current treatment is therefore suitable for practical industrial applications.

Improving the Dewatering of Marine Sediment Using a Combination of Geo-Textile and Electrokinetic Treatment

2017 ◽  
Author(s):  
Silja Kostia ◽  
Janika Tuomi ◽  
Martin Romantschuk
Keyword(s):  
Water Column ◽  
Direct Current ◽  
Marine Sediment ◽  
Clay Content ◽  
Water Layer ◽  
Control Treatment ◽  
Dredged Material ◽  
Dredged Sediment ◽  
Electric Treatment ◽  
Electro Osmosis

The purpose of this study was to test whether electro-osmosis can be used to increase the effectiveness of dewatering of dredged sediment being drained in geo- textile tubes. The marine sediment used in the study had a high proportion of clay known to be problematic in geo-tube treatment. The laboratory set-ups were performed using sediment-filled sacks (approximately 5-7 liters / sack) sewn from geo-textile (TenCate Geotube® GT500), and plastic columns (approximately 1.6 liters / column) closed at the bottom with geo-textile, both supplied with electrodes for applying direct current. In the sack set-ups, a seven-hour electric treatment led to the same result as the 72-hour control treatment. The volume of the sediment decreased in column set-ups by 32 % due to electric treatment while only a 14 % decrease was obtained in the controls after 189 hours. The water layer on top of the sediment treated with electro-osmosis decreased by up to one-fifth, as compared to the control columns. We can conclude that electro-osmosis is an effective approach to boost the dewatering of the dredged sediment treated in geo-textile tubes. When draining sediment with a high clay content, electric treatment can prevent the formation of a water column on top of the sediment. This in turn accelerates dewatering of the dredged material.

Physiological and hypertonic saline solutions impair ciliary activity in vitro

2000 ◽  
Vol 25 (4) ◽  
pp. 331-332
Author(s):  
W.M. Boek ◽  
N. Keles ◽  
K. Graamans ◽  
E.H. Huizing
Keyword(s):  
Hypertonic Saline ◽  
Ciliary Activity ◽  
Saline Solutions

Inter-Method Reliability of Pulse Volume Related Measures Derived Using Finger-Photoplethysmography

2018 ◽  
Vol 32 (4) ◽  
pp. 182-190 ◽  
Author(s):  
Kenta Matsumura ◽  
Koichi Shimizu ◽  
Peter Rolfe ◽  
Masanori Kakimoto ◽  
Takehiro Yamakoshi
Keyword(s):  
Light Intensity ◽  
Adverse Effects ◽  
Light Source ◽  
Direct Current ◽  
Resting State ◽  
Current Component ◽  
Psychophysiological Measures ◽  
Pulse Volume ◽  
Optical Paths ◽  
Sensor Positions

Abstract. Pulse volume (PV) and its related measures, such as modified normalized pulse volume (mNPV), direct-current component (DC), and pulse rate (PR), derived from the finger-photoplethysmogram (FPPG), are useful psychophysiological measures. Although considerable uncertainties exist in finger-photoplethysmography, little is known about the extent of the adverse effects on the measures. In this study, we therefore examined the inter-method reliability of each index across sensor positions and light intensities, which are major disturbance factors of FPPG. From the tips of the index fingers of 12 participants in a resting state, three simultaneous FPPGs having overlapping optical paths were recorded, with their light intensity being changed in three steps. The analysis revealed that the minimum values of three coefficients of Cronbach’s α for ln PV, ln mNPV, ln DC, and PR across positions were .948, .850, .922, and 1.000, respectively, and that those across intensities were .774, .985, .485, and .998, respectively. These findings suggest that ln mNPV and PR can be used for psychophysiological studies irrespective of minor differences in sensor attachment positions and light source intensity, whereas and ln DC can also be used for such studies but under the condition of light intensity being fixed.

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