Determination of Calcium and Magnesium in Milk by E.D.T.A. Titration

Bird, E.W.; Weber, June; Cox, Christopher; Chen, T.C.

doi:10.3168/jds.s0022-0302(61)89854-8

Cited by 19 publications

(13 citation statements)

References 2 publications

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“…DPA was determined by the method of Jansscn et nl. (1958), and calcium by an adaptation of an EDTA titration method developed by Bird et al (1961). Dry weight of spores was determined by drying a measured quantity of spore suspension to a constant weight at 55°C.…”

Section: Methodsmentioning

confidence: 99%

Release of Cellular Constituents During Heat Inactivation of Endospores of Aerobic Bacilli

Walker

Matches

1965

Journal of Food Science

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SUMMARY Release of dipicolinic acid from spores of some species of Bacillus during heating at 100°C was determined. The total amount and rate of release of dipicolinic acid from these spores varied between species and strains, the most resistant spores releasing the least. Studies were made on Bacillus polymyxa and B. megaterium to determine the influence of buffers and pH on the liberation of dipicolinic acid, carbohydrate, and nitrogen. Release of these materials was usually least at pH 7.0 and greatest under conditions that favored thermal inactivation. Some of the amino acids and carbohydrates released were identified.

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Section: Methodsmentioning

confidence: 99%

Release of Cellular Constituents During Heat Inactivation of Endospores of Aerobic Bacilli

Walker

Matches

1965

Journal of Food Science

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“…where V a is the consumption of titrating reagent (EDTA) for the sample [ml], V b is the consumption of titrating reagent (EDTA) for the blank value [ml], C is the concentration of the titrating reagent [mol/l], f is the factor of the titrating reagent (Bird et al 1961), and m represents the weight of sample [g]. All the values obtained were mean value of 4 parallel measurements.…”

Section: Determination Of Carboxyl Group and Nitrogen Contentmentioning

confidence: 99%

Using atmospheric pressure plasma for enhancing the deposition of printing paste on cotton fabric for digital ink-jet printing

2011

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Atmospheric pressure plasma (APP) treatment was applied as a pretreatment process to enhance the deposition of printing paste in order to improve the final colour properties of digital ink-jet printed cotton fabrics. Three printing pastes containing natural polymers, i.e. (1) sodium alginate, (2) chitosan and (3) sodium alginate-chitosan mixture, were prepared separately. After APP treatment, cotton fabric was padded with different printing pastes prior to digital ink-jet printing. Experimental results showed that APP pretreatment could increase the colour yield of the digital ink-jet printed cotton fabric significantly even after washing. In addition, other properties such as colour fastness to crocking, colour fastness to laundering, outline sharpness and anti-bacterial properties were also improved when compared with those of the control cotton fabric printed without APP pretreatment. However, the influence of printing paste on the colour properties of the digital ink-jet printed cotton fabrics depended very much on the composition of the printing paste. The scanning electron microscope images evidenced that the APP treatment could enhance the deposition of printing paste on the cotton fabric surface as proved qualitatively by both the contact angle and wetting time measurement as well as quantitatively by both the X-ray photoelectron spectroscopy and carboxyl group/nitrogen content analysis.

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“…The procedures followed were those described by Umbreit, Burris, and Stouffer (1957). Dipicolinic acid was determined by the method of Janssen, Lund, and Anderson (1958); calcium and magnesium by an adaptation of an ethylenediaminetetraacetic acid-titrating method developed Bird et al (1961). For this latter determination, the spores were digested in a concentrated mixture of three parts of concentrated HN03 to one of H2S04.…”

Section: Culturesmentioning

confidence: 99%

Chemical Composition and Heat Resistance of Some Aerobic Bacterial Spores

1961

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WALKER, HOMER W. (Iowa State University of Science and Technology, Ames), JACK R. MATCHES, AND JOHN C. AYRES. Chemical composition and heat resistance of some aerobic bacterial spores. J. Bacteriol. 82:960-966. 1961.-Analyses of spores of Bacillus species for nitrogen, carbohydrate, dipicolinic acid, and phosphorus showed little correlation with heat resistance. However, as the molar concentration of magnesium increased in relation to dipicolinic acid and calcium concentrations, heat resistance generally decreased. Analyses of several batches of spores indicated that this relationship between calcium, magnesium, and dipicolinic acid did not always hold true. Therefore, while these materials apparently play an important role, other factors need to be included before a full explanation of thermal stability of spores can be made.

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Determination of Calcium and Magnesium in Milk by E.D.T.A. Titration

Cited by 19 publications

References 2 publications

Release of Cellular Constituents During Heat Inactivation of Endospores of Aerobic Bacilli

Release of Cellular Constituents During Heat Inactivation of Endospores of Aerobic Bacilli

Using atmospheric pressure plasma for enhancing the deposition of printing paste on cotton fabric for digital ink-jet printing

Chemical Composition and Heat Resistance of Some Aerobic Bacterial Spores

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