scholarly journals Isolation of Vibrio Species on TSA Media and Comparision of Growth Percentage of Vibrio Species in Sea Water, Pond Water, Tap Water, Ground Water and River Water Samples

2016 ◽  
Vol 5 (4) ◽  
pp. 27-31
Keyword(s):  
Ground Water ◽  
River Water ◽  
Water Samples ◽  
Sea Water ◽  
Tap Water ◽  
Pond Water ◽  
Vibrio Species ◽  
River Water Samples ◽  
Water Pond

scholarly journals Species of Fusarium Isolated from River and Sea Water of Southeastern Spain and Pathogenicity on Four Plant Species

Plant Disease ◽  
2009 ◽  
Vol 93 (4) ◽  
pp. 377-385 ◽  
Author(s):  
D. Palmero ◽  
C. Iglesias ◽  
M. de Cara ◽  
T. Lomas ◽  
M. Santos ◽  
...  
Keyword(s):  
River Water ◽  
Water Samples ◽  
Sea Water ◽  
Long Distance Dispersal ◽  
Damping Off ◽  
Long Distance ◽  
River Water Samples ◽  
Southeastern Spain ◽  
Coastal Sea ◽  
The Mediterranean

Species of Fusarium were isolated from water samples collected from the Andarax River and coastal sea water of the Mediterranean in Granada and Almería provinces of southeastern Spain. In total, 18 water samples were analyzed from the Andarax River, and 10 species of Fusarium were isolated: Fusarium anthophilum, F. acuminatum, F. chlamydosporum, F. culmorum, F. equiseti, F. verticillioides, F. oxysporum, F. proliferatum, F. solani, and F. sambucinum. In addition, five species were isolated from 33 sea water samples from the Mediterranean Sea: F. equiseti, F. verticillioides, F. oxysporum, F. proliferatum, and F. solani. When considering the samples by their origins, 77.8% of the river water samples yielded at least one species of Fusarium, with F. oxysporum comprising 72.2% of the total isolates. In the case of marine water, 45.5% of the samples yielded at least one species of Fusarium, with F. solani comprising 36.3% of the total isolates. The pathogenicity of 41 isolates representing nine of the species collected from river and sea water during the study was evaluated on barley, kohlrabi, melon, and tomato. Inoculation with F. acuminatum, F. chlamydosporum, F. culmorum, F. equiseti, F. verticillioides, F. oxysporum, F. proliferatum F. solani, and F. sambucinum resulted in pre- and post-emergence damping off. Pathogenicity of Fusarium isolates did not seem to be related to the origin of the isolates (sea water or fresh water). However, the presence of pathogenic species of Fusarium in river water flowing to the sea could indicate long-distance dispersal in natural water environments.

Survival characteristics of Cercaria chackai (Digenea: Transversotrematidae)

1983 ◽  
Vol 57 (1) ◽  
pp. 21-26 ◽  
Author(s):  
A. Mohandas ◽  
M.S. Syed Ismail Koya
Keyword(s):  
Survival Time ◽  
Sea Water ◽  
Tap Water ◽  
Pond Water ◽  
Deionized Water ◽  
Digenetic Trematode ◽  
Two Factors ◽  
Water Pond ◽  
Survival Pattern ◽  
The Difference

AbstractThe survival characteristics of Cercaria chackai, the larval form of the curious ectoparasitic digenetic trematode Transversotrema chackai, in sea water, sea water diluted with deionized water in different proportions, deionized water, pond water and tap water were studied. Naturally shed, fresh cercariae had the maximum life span of 20 h 40 min in pond water at salinity 17·8‰, pH 6·45, O2 5·76ml/l and temperature 31·5°C. With increase in salinities beyond 17·8‰, survival time was drastically reduced and beyond 23·58‰,, was restricted to a few minutes. In sea water with a salinity of 38·3‰, the maximum survival time was only 8 min. Below 17·8‰ salinity, although the survival time was less, the difference was not very marked and even in tap water with no salinity, the cercariae lived up to 19 h 50 min. In deionized water the maximum survival time was only 3 h 15 min. Since pond water at pH 6·45 allowed maximum survival time, it is presumed that the cercariae preferred a slightly acidic medium. As temperature was maintained constant and oxygen was available, neither of these two factors, apparently, affected the survival pattern. It is concluded that C. chackai is a typical freshwater form showing considerable tolerance to fluctuations in salinity although the family Transversotrematidae is considered to have a marine origin.

scholarly journals Determination of Phenol in Tap Water and River Water Samples by Solid-Phase Spectrophotometry

2000 ◽  
Vol 16 (3) ◽  
pp. 269-273 ◽  
Author(s):  
Isoshi NUKATSUKA ◽  
Sachiko NAKAMURA ◽  
Kaori WATANABE ◽  
Kunio OHZEKI
Keyword(s):  
River Water ◽  
Water Samples ◽  
Solid Phase ◽  
Tap Water ◽  
River Water Samples ◽  
Solid Phase Spectrophotometry

Fabrication of dendritic nanoporous gold via a two-step amperometric approach: Application for electrochemical detection of methyl parathion in river water samples

Talanta ◽  
2021 ◽  
Vol 226 ◽  
pp. 122130
Author(s):  
Gilberto J. Silva Junior ◽  
Jéssica Soares Guimarães Selva ◽  
Anandhakumar Sukeri ◽  
Josué M. Gonçalves ◽  
Matias Regiart ◽  
...  
Keyword(s):  
River Water ◽  
Electrochemical Detection ◽  
Water Samples ◽  
Methyl Parathion ◽  
Nanoporous Gold ◽  
River Water Samples

Modified paramagnetic beads in a microfluidic system for the determination of ethinylestradiol (EE2) in river water samples

2010 ◽  
Vol 25 (6) ◽  
pp. 1376-1381 ◽  
Author(s):  
Noelia A. Martínez ◽  
Rudolf J. Schneider ◽  
Germán A. Messina ◽  
Julio Raba
Keyword(s):  
River Water ◽  
Water Samples ◽  
Microfluidic System ◽  
River Water Samples ◽  
Paramagnetic Beads

scholarly journals Heavy metal levels in drinking water sources of Chingola District, Zambia

2020 ◽  
Author(s):  
Francis Hamwiinga ◽  
Chisala D. Meki ◽  
Patricia Mubita ◽  
Hikabasa Halwiindi
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Drinking Water ◽  
Ground Water ◽  
Water Samples ◽  
Tap Water ◽  
Water Sources ◽  
Wet Season ◽  
Drinking Water Sources ◽  
Metal Levels

Abstract Background: One of the factors impeding access to safe water is water pollution. Of particular concern is heavy metal contamination of water bodies. This study was aimed at determining the levels of heavy metals in drinking water sources of Chingola District of Zambia. Methods: A cross sectional study was employed. A total of 60 water samples were collected. Thirsty (30) samples were collected in the dry season in the month of October 2016 and another 30 in the wet season in the months of February and March, 2017. For each season 10 water samples were collected from each of the three water sources. i.e. Tap water, Urban ground water sources and Rural ground water sources. Heavy metal analysis was done using Atomic Absorption Spectrophotometer (AAS).Results: This study revealed that the concentrations of Iron, Manganese, Lead, Nickel and Arsenic were beyond maximum permissible levels in various water sources. Combined averages for both dry and wet seasons were as follows: Iron: 2.3, Copper: 0.63, Cobalt: 0.02, Manganese: 0.36, Lead: 0.04, Zinc:3.2, Nickel: 0.03, Arsenic: 0.05. Chromium and Cadmium were below detection limit in all water samples. The median concentrations of iron, arsenic, copper, manganese in drinking water from the Tap, rural and urban ground water sources were different, and this difference was statistically significant (p<0.05). The median concentrations of arsenic, nickel, manganese and cobalt were different between dry and wet season, and this difference was statistically significant (p<0.05).Conclusions: Sources of heavy metals in water seems to be both natural and from human activities. The concentration of heavy metals in different water sources in this study was found to be above the recommended levels. This calls for improvement in water monitoring to protect the health of the public. Therefore, there is need for continuous monitoring of heavy metals in drinking water sources by regulatory authorities.

Spectrophotometry determination of Congo red in river water samples using nanosilver

2012 ◽  
Vol 94 (10) ◽  
pp. 1886-1892 ◽  
Author(s):  
R. Sahraei ◽  
A. Farmany ◽  
S.S. Mortazavi ◽  
H. Noorizadeh
Keyword(s):  
River Water ◽  
Water Samples ◽  
Congo Red ◽  
River Water Samples
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