Pilot Study for U.S. Geological Survey Standard Reference Water Samples for Pesticides

1984 ◽  
Vol 12 (2) ◽  
pp. 114 ◽  
Author(s):  
R Horstman ◽  
KA Peters ◽  
S Gebremedhin ◽  
RL Meltzer ◽  
M Bruce Vieth ◽  
...  
Keyword(s):  
Pilot Study ◽  
Water Samples ◽  
Geological Survey

scholarly journals Stockholm Natural Radiocarbon Measurements II

Radiocarbon ◽  
1959 ◽  
Vol 1 ◽  
pp. 35-44 ◽  
Author(s):  
H. Göte Östlund
Keyword(s):  
Water Samples ◽  
Sea Water ◽  
Geological Survey ◽  
Direct Continuation ◽  
Radiocarbon Datings

This paper is a list of the radiocarbon datings of geologic and archaeologic samples made during 1958 after the dating apparatus had been installed at the Geological Survey. It is a direct continuation of the first dating list (Östlund, 1957a). Some of the results of geophysical interest, measurements of a few sea water samples, have been published separately (Fonselius and Östlund, 1959); others will follow.

scholarly journals Identification of SARS-CoV-2 and Enteroviruses in Sewage Water—A Pilot Study

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 844
Author(s):  
Anda Băicuș ◽  
Carmen Maria Cherciu ◽  
Mihaela Lazăr
Keyword(s):  
Cell Culture ◽  
Pilot Study ◽  
Early Detection ◽  
Severe Acute Respiratory Syndrome ◽  
Water Samples ◽  
Sewage Water ◽  
Specific Test ◽  
Prevalence Estimates ◽  
Rapid Tests ◽  
Pcr Assays

Due to the outbreak of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), combined with the risk of polio importation from Ukraine, we evaluated the presence of SARS-CoV-2 and enteroviruses in 25 sewage water samples from Romania, concentrated using the WHO method between January 2020 and January 2021. Surveillance for enteroviruses and SARS-CoV-2 are relevant in the calculation of prevalence estimates as well as early detection of the introduction or disappearance of these viruses. For SARS-CoV-2 detection, we used two immunochromatographic nucleocapsid antigenic tests as well as real-time PCR assays, produced for respiratory samples. The isolation of cell culture lines, in accordance with the WHO recommendations, was carried out for enterovirus detection. Twenty-three of the samples investigated were positive in rapid tests for SARS-CoV-2, while the RNA of SARS-CoV-2, detected with Respiratory 2.1 plus a panel Biofire Film array, was present in eight samples. The Allplex 2019-nCoV assay was used for the validation of the tests. There were three genes detected in one sample, E, RdPR, and N, two genes, E and RdPR, in one sample, two genes, RdPR and N, in four samples, one gene, RdPR, in five samples and one gene, N, in one sample. Eight samples were positive for non-polio enteroviruses, and no poliovirus strains were isolated. This study suggests the presence of SARS-CoV-2 and enteroviruses in Romanian sewage water in 2020. As such, our results indicate that a rapid, more specific test should be developed especially for the detection of SARS-CoV-2 in sewage water.

scholarly journals The correlation between the mineral drinking water composition and the relevance of dentine in health – A pilot study

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Creteanu Razvan ◽  
Monica Popa ◽  
Ana-Maria Incze ◽  
Creteanu Cristina
Keyword(s):  
Drinking Water ◽  
Pilot Study ◽  
Water Samples ◽  
Negative Impact ◽  
Inverse Correlation ◽  
Future Research ◽  
Creative Commons ◽  
Permanent Molar ◽  
Water Composition ◽  
Carious Teeth

Objective: This study estimated the concentration of Ca, Mg and F in drinking water from five counties in Transylvania, Romania and correlated these with mineral values found in the dentine of permanent carious teeth. The role of these minerals on the re-mineralization of teeth is broadly analyzed. Methods: The study consists of two parts: the first part is a pilot study aimed at determining the concentration of Ca, Mg and F in the dentine of permanent carious teeth of 75 male adults with residence in five counties in Transylvania. The second part is an evaluation of the levels of mineral composition in the drinking water from these counties. Mineral concentrations in dentine and drinking water samples, were determined in the laboratories of the public health institute and the research and analysis institute in Cluj Napoca, Romania. Results: Statistically we found a direct and significant correlation between the Ca, Mg and F contain from the water samples and Ca, Mg and F contain from the dentine samples and an inverse correlation was statistically highlighted between Ca found in water samples and the F concentration in dentine samples. Improperly water mineralization associated with a general lack of fluoride reveals a potential negative impact on consumer health, including the oral-jaw system. Conclusions: The results of this study indicate the need for improving the prevention of dental caries which is a priority in promoting orthodontic health for children. The variability in dentine minerals indicates the fact that permanent molar dentin represents an important biomarker for exposure. The future research will have to take into consideration the community residency status and the fact that these studies require a large sample to separate individual and community level contributions to dentin fluoride. Considering these notifications, we conclude that minerals are highly associated with caries. doi: https://doi.org/10.12669/pjms.36.3.1820 How to cite this:Razvan C, Popa M, Incze AM, Cristina C. The correlation between the mineral drinking water composition and the relevance of dentine in health – A pilot study. Pak J Med Sci. 2020;36(3):---------. doi: https://doi.org/10.12669/pjms.36.3.1820 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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