scholarly journals Bluephage, a method for efficient detection of somatic coliphages in one hundred milliliter water samples

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Javier Méndez ◽  
Daniel Toribio-Avedillo ◽  
Raquel Mangas-Casas ◽  
Judit Martínez-González
Keyword(s):  
Water Samples ◽  
Somatic Coliphages ◽  
Efficient Detection

Modern nanobiotechnologies for efficient detection and remediation of mercury

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mulayam Singh Gaur ◽  
Rajni Yadav ◽  
Mamta Kushwah ◽  
Anna Nikolaevna Berlina
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Low Cost ◽  
High Sensitivity ◽  
Environmental Water ◽  
Mercury Ions ◽  
Content Type ◽  
Efficient Detection ◽  
Sensitivity And Selectivity ◽  
Selection Of

Purpose This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. Design/methodology/approach Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples. Findings This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples. Originality/value This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

scholarly journals A Chelation-Enhanced Fluorescence Assay Using Thiourea Capped Carbonaceous Fluorescent Nanoparticles For As (III) Detection In Water Samples

2021 ◽  
Author(s):  
Susan Mohammadi ◽  
Somayeh Mohammadi ◽  
Abdollah Salimi ◽  
Rezgar Ahmadi
Keyword(s):  
Water Samples ◽  
Limit Of Detection ◽  
Threshold Value ◽  
Water Soluble ◽  
World Health ◽  
Fluorescent Nanoparticles ◽  
Detection Range ◽  
Turn On ◽  
Efficient Detection ◽  
Health Organization

Abstract Herein, we designed a sensitive and selective “Turn-On” fluorescence nanosensor using water-soluble carbonaceous fluorescent nanomaterials (CFNs) functionalized with thiourea (CFNs-thiourea) for efficient detection of trace amounts of arsenic (III) in aqueous samples. The CFNs and CFNs-Thiourea were characterized by transmission electron microscopy (TEM), UV–Visible spectroscopy (UV-vis) and Fourier transformed infrared spectroscopy (FTIR). The emission peak intensity of proposed nanosensor at 425 nm was gradually enhanced on arsenite addition in wide detection range (3.3–828.5 µg L-1) attributed to the binding of arsenite species with sulfur groups of CFNs-thiourea. The limit of detection (LOD) was 0.48 µg L-1 being much lower than the World Health Organization (WHO) recommended threshold value of 10 µg L-1. Furthermore, the as prepared thiourea -CFNs exhibited an superb selectivity for As (III) compared various cations and anions such as; NO3−, NO2−, F−, Ni2+, Fe3+, Cu2+, Ca2+, Mg2+, Zn2+, Fe2+, Hg2+, Pb2+, F-, Cl-, Mn2+, Cr3+, Co2+, Cd2+, Bi3+, Al3+ and As (V) at 100 folds concentration of As (III). The turn on fluorescence nanosensor was successfully exploited for quantification of arsenic in spiked water samples with acceptable efficiencies.

Evaluation of a Norwegian-developed ELISA to determine microcystin concentrations in fresh water

2018 ◽  
Vol 19 (3) ◽  
pp. 743-752 ◽  
Author(s):  
C. J. Botha ◽  
P. N. Laver ◽  
A. Singo ◽  
E. A. Venter ◽  
G. C. H. Ferreira ◽  
...  
Keyword(s):  
South Africa ◽  
Fresh Water ◽  
Microcystis Aeruginosa ◽  
Water Samples ◽  
Water Bodies ◽  
Elisa Kit ◽  
Methanol Extraction ◽  
Efficient Detection ◽  
Resin Adsorption ◽  
User Friendly

Abstract Cyanobacteria are known for their extensive and highly visible blooms in rivers or dams in Africa. One of the most important cyanobacteria is Microcystis aeruginosa which can synthesise various microcystins that may affect the health of humans and animals. Accurate and efficient detection of microcystins in water is thus important for public and veterinary health. Two enzyme-linked immunosorbent assays (ELISA), a commercially-available ELISA kit (Abraxis) and a newly-developed Norwegian ELISA (putatively cheaper and more robust) were used to detect microcystins in fresh water in South Africa. Water samples were collected monthly at two sites, the Hartbeespoort Dam and a crocodile breeding dam. Extremely high microcystin concentrations (exceeding 360 μg L−1) were detected in the Hartbeespoort Dam during January 2015, whereas the microcystin concentrations in the crocodile breeding dam peaked during March–April 2015. Both ELISAs were positively correlated when analysing water samples ‘as is’ and following resin adsorption and methanol extraction. However, following resin adsorption and methanol extraction of the water samples, the correlation between the two assays was much stronger. These results suggests that the two ELISAs provide comparable results. If the Norwegian-developed ELISA can be packaged and made available as a user-friendly kit, it could be used successfully in surveillance programmes to monitor microcystin concentrations in fresh water bodies in Africa.

Bacteriophage Monitoring in Drinking Water: Do They Fulfil the Index or Indicator Function?

1993 ◽  
Vol 27 (3-4) ◽  
pp. 463-470 ◽  
Author(s):  
Robert Armon
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Enteric Viruses ◽  
High Volume ◽  
Pollution Source ◽  
Fecal Coliforms ◽  
Poor Correlation ◽  
Human Pathogens ◽  
Somatic Coliphages ◽  
Total Coliforms

2,187 drinking water samples from various locations in northern part of Israel were tested for bacteriophages presence/absence. Three major groups of bacteriophages were monitored (as related to bacterial host) : Somatic coliphages (host E.coli CN13), F-specific coliphages (host E.coli F+ amp), and Bacteroides fragilis phages (host B.fragilis HSP40). Simultaneously, monitoring of total coliforms and fecal coliforms has been performed. Correlation between bacteriophage group types and the standard water indicators such as coliforms and fecal coliforms was poor. The poor correlation may be attributed to dilution factor (large distance from the pollution source) and/or disinfection process. Presence frequency of the three bacteriophage groups was : 11.5 % somatic coliphages, 6.46 % F-specific coliphages and 5.48 % B.fragilis phages. Bacteriophages' presence plotted against presence of total coliforms, fecal coliforms, or both, revealed that F-specific coliphages and B.fragilis phages are closely related, whereas somatic coliphages group is different. Concentrates of several high volume water samples were tested for enteric viruses and B.fragilis phages presence correlation. All the samples were found negative for both parameters, however positive samples have not been detected. It is expected that continuous monitoring of drinking water for enteric viruses and concurrently for bacteriophages, will elucidate the index potential of bacteriophages. Bacteriophages presence in drinking water points to inadequate water treatment or contamination during the supply practice. Using human specific bacteriophages such as B.fragilis phages, will enable us to differentiate between pollution sources that contaminate drinking water. Future studies should be focused on phages presence as related to health risk assessment, similarly to human pathogens (bacteria, viruses and protozoa). Based on the collected data, F-specific and B.fragilis phages indicate towards reliable future index-organisms of drinking water pollution by sewage.

A novel pyrene-based fluorescent probe for the rapid and efficient detection of Co2+ in HeLa cells and natural water samples

2020 ◽  
Vol 303 ◽  
pp. 112680 ◽  
Author(s):  
Meiqing Zhu ◽  
Wenliang Wang ◽  
Jia Liu ◽  
Risong Na ◽  
Zhenfeng Li ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Hela Cells ◽  
Natural Water ◽  
Water Samples ◽  
Natural Water Samples ◽  
Efficient Detection

Fabrication of dual-template molecularly imprinted mesoporous silica for simultaneous rapid and efficient detection of bisphenol A and diethylstilbestrol in environmental water samples

2019 ◽  
Vol 11 (37) ◽  
pp. 4761-4768 ◽  
Author(s):  
Mengjie Tian ◽  
Kai Yu ◽  
Leyan Li ◽  
Yafei Wang ◽  
Liping Guo ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Mesoporous Silica ◽  
Bisphenol A ◽  
Water Samples ◽  
Mesoporous Structure ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Molecularly Imprinted ◽  
Efficient Detection ◽  
Ordered Mesoporous

DMIMS showed an ordered mesoporous structure, favorable thermal stability, and good accessibility and achieved simultaneous rapid and efficient detection of BPA and DES in environmental water samples.

Highly efficient detection of salbutamol in environmental water samples by an enzyme immunoassay

2018 ◽  
Vol 613-614 ◽  
pp. 861-865 ◽  
Author(s):  
Zhenjiang Liu ◽  
Bo Zhang ◽  
Jianfan Sun ◽  
Yinhui Yi ◽  
Ming Li ◽  
...  
Keyword(s):  
Enzyme Immunoassay ◽  
Water Samples ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Highly Efficient ◽  
Efficient Detection

Pollutant Identification by Selected Area Electron Diffraction

1974 ◽  
Vol 32 ◽  
pp. 532-533
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson ◽  
C. W. Walker
Keyword(s):  
Thermal Treatment ◽  
Electron Diffraction ◽  
Sample Preparation ◽  
Crystal Structures ◽  
Water Samples ◽  
Environmental Samples ◽  
Short Review ◽  
Selected Area Electron Diffraction ◽  
Multiple Component

Selected area electron diffraction (SAD) has been used successfully to determine crystal structures, identify traces of minerals in rocks, and characterize the phases formed during thermal treatment of micron-sized particles. There is an increased interest in the method because it has the potential capability of identifying micron-sized pollutants in air and water samples. This paper is a short review of the theory behind SAD and a discussion of the sample preparation employed for the analysis of multiple component environmental samples.

Enumeration and Identification of Asbestos Fibres in Water

1974 ◽  
Vol 32 ◽  
pp. 526-527 ◽  
Author(s):  
O. Mudroch ◽  
J. R. Kramer
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Drainage Basin ◽  
Lake Superior ◽  
Research Work ◽  
List Type ◽  
The West ◽  
Asbestos Fibre ◽  
Amphibole Asbestos

Approximately 60,000 tons per day of waste from taconite mining, tailing, are added to the west arm of Lake Superior at Silver Bay. Tailings contain nearly the same amount of quartz and amphibole asbestos, cummingtonite and actinolite in fibrous form. Cummingtonite fibres from 0.01μm in length have been found in the water supply for Minnesota municipalities.The purpose of the research work was to develop a method for asbestos fibre counts and identification in water and apply it for the enumeration of fibres in water samples collected(a) at various stations in Lake Superior at two depth: lm and at the bottom.(b) from various rivers in Lake Superior Drainage Basin.

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