A Comparison of the Molecular Filtration Technique with Agar Plate Counting for Enumeration of
            <i>Escherichia coli</i>
            in Various Aqueous Concentrations of Zinc and Copper Sulfates

Shipe, E. L.; Fields, Adelaide

doi:10.1128/am.2.6.382-384.1954

Cited by 7 publications

(1 citation statement)

References 4 publications

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“…The pour plate technique gave higher fecal coliform counts and a lower rate of die-off than the mfc method (Figure 1). Shipe and Fields (1954) had similar results with E. coli cells which had been suspended in zinc or copper sulfate solutions. They assumed that either toxic metals were concentrated on the membrane surface or that some cells weakened by the metals could no longer form colonies on the membrane.…”

Section: Methodssupporting

confidence: 53%

Bactericidal properties of digested sewage sludge

Molina¹,

Braids²,

Hinesly³

1972

Environ. Sci. Technol.

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Another feature of thin sheets such as these is their easy implementation to total particulate measurements. Since the mass of material per stage will be very small, a collection surface which is to be weighed before and after sampling should itself have as little mass as possible. The glass or stainless steel surfaces included in impactors are heavy enough to cause large errors when determining the difference between two large numbers, but use of polyethylene greatly eases this situation. In addition, polyethylene has no hygroscopicity problems. AcknowledgmentWe are indebted to S. S. Brar of Argonne National Laboratory for providing us with the reference polystyrene filter material. Literature Cited

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Section: Methodssupporting

confidence: 53%

Bactericidal properties of digested sewage sludge

Molina¹,

Braids²,

Hinesly³

1972

Environ. Sci. Technol.

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Use of Molecular Filter Membranes for Water Potability Control

Thomas¹,

Woodward²,

Kabler³

1956

Journal AWWA

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Bactericidal Effect of Low Concentrations of Silver

Chambers¹,

Proctor²,

Kabler³

1962

Journal AWWA

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This article discusses experiments that found that the germicidal action of a specified amount of silver was related to the concentration of silver ions rather than to the physical nature of the silver from which the ions were originally derived. Neither the presence or absence of light nor the change in the density of test organisms within the range of 1,680 – 1,800,000 per milliliter produces a discernible effect on the bactericidal action of silver. Phosphate tends to decrease germicidal efficiency, whereas increases of pH accelerate death rates. Of the several neutralizers studied, a mixture of sodium thiosulfate and sodium thioglycollate was found to be most efficient. In the presence of inefficient neutralizers, bacteriostasis may be mistaken for bactericidal action. When silver‐contaminated glass is reused, some of the silver is desorbed and exerts a germicidal action. In these studies, boiling in sodium chloride solution was the most effective method of removing the silver from glassware. Radioactive Ag110m is useful in determining silver concentrations in solution and the residual remaining on surfaces.

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A Comparison of the Molecular Filtration Technique with Agar Plate Counting for Enumeration of Escherichia coli in Various Aqueous Concentrations of Zinc and Copper Sulfates

Cited by 7 publications

References 4 publications

Bactericidal properties of digested sewage sludge

Bactericidal properties of digested sewage sludge

Use of Molecular Filter Membranes for Water Potability Control

Bactericidal Effect of Low Concentrations of Silver

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