Microbiology and Chemical Changes in Raw Hams of Italian Type

Giolitti, G; Cantoni, C.; Bianchi, María Angélica; Renon, P

doi:10.1111/j.1365-2672.1971.tb02268.x

Cited by 42 publications

(17 citation statements)

References 5 publications

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“…The detection of thiol-derivated substances is an important field of research as they can be present as contaminants in fuels [1], act as physiological indicators in biological fluids [2] and used as markers of food deterioration [3,4]. During the last decade, several authors have reported that unsubstituted and substituted transition-metal phthalocyanines, adsorbed on graphite electrodes at monolayer levels, exhibit substantial electrocatalytic activity for the oxidation of several thiols like l-cysteine, reduced glutathione, 2-mercaptoethanol and 2-mercaptoethanesulfonic acid [5 ± 7].…”

Section: Introductionmentioning

confidence: 99%

Cobalt Phthalocyanine‐Based Molecular Materials for the Electrocatalysis and Electroanalysis of 2‐Mercaptoethanol, 2‐Mercaptoethanesulfonic Acid, Reduced Glutathione and L‐Cysteine

et al. 2003

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We have investigated the electrocatalytic activity of cobalt tetra-aminophthalocyanine (CoTAPc) for the one-electron oxidation of thiols of various sizes, namely 2-mercaptoethanol, 2-mercaptoethanesulfonic acid, reduced glutathione and l-cysteine, using adsorbed monomeric CoTAPc and electropolymerized poly-CoTAPc films of different thickness on a vitreous carbon electrode. Our results show that the electrocatalytic activity of poly-CoTAPc films towards the oxidation of the thiols increases slightly with the thickness of the film, but remains similar to that of the adsorbed monomeric CoTAPc. The higher stability of the electropolymerized poly-CoTAPc films makes them attractive for applications in the activation and/or the detection of thiols. We have assessed this approach by designing ultra-microcarbon-fiber electrodes, coated with poly-CoTAPc, and combining their use with different electrochemical techniques (cyclic voltammetry, differential pulse voltammetry and differential normal pulse amperometry) for the electroanalysis of the examined thiols.

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Section: Introductionmentioning

confidence: 99%

Cobalt Phthalocyanine‐Based Molecular Materials for the Electrocatalysis and Electroanalysis of 2‐Mercaptoethanol, 2‐Mercaptoethanesulfonic Acid, Reduced Glutathione and L‐Cysteine

et al. 2003

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“…It was shown that glutathione [I-41, coenzyme A [I] and thiocholine [5] could be monitored at considerably lower voltages than was possible at plain carbon electrodes thereby giving superior selectivity. Recently, several other thiol containing substances have become of interest as they may be useful as markers of food deterioration [6,7]; these substances are ethanethiol (C2H5SH), which is a low boiling liquid at room temperature, methanethiol (CH,SH) and hydrogen sulfide which are both gases at room temperature. Bearing in mind that we had previously exploited the electrocatalytic oxidation of thiols for their measurement by amperometry, we considered that it might be feasible to use a similar approach for the measurement of the three other thiols mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Voltammetric and amperometric studies of selected thiols and dimethyldisulfide using a screen‐printed carbon electrode modified with cobalt phthalocyanine: Studies towards a gas sensor

Napier

Hart

1996

Electroanalysis

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Cyclic voltammetry was used to investigate the electrochemical behavior of hydrogen sulfide, methanethiol, ethanethiol and dimethyldisulfide at a cobalt phthalocyanine modified screen-printed carbon electrode (SPE) in phosphate electrolytes of different pH values. The thiols and hydrogen sulfide were found to undergo electrocatalytic oxidation while dimethyldisulfide exhibited an electrocatalytic reduction reaction. These processes were considered to involve the central cobalt(ii) ion in the phthalocyanine macrocycle. The possibility of monitoring the thiols by exploiting the electrocatalytic oxidation process and DMDS by the electrocatalytic reduction process was examined by amperometry. In one approach a bulk phosphate electrolyte, pH 12.0, was employed. The amperometric behavior of the low boiling liquids ethanethiol and DMDS were studied by making standard additions to a stirred solution; both species showed rapid response times at applied potentials of +O. 15 V and -0.40 V, respectively. The gaseous thiols, hydrogen sulfide and methanethiol, were examined by bubbling these through the same bulk electrolyte and again rapid, reproducible and reversible signals were obtained. In another approach a gel was prepared by adding agarose to the same phosphate electrolyte and a thin layer was deposited over the working and counter: referencc electrodes of a screen-printed strip. This sensor showed favorable electrochemical characteristics for the gaseous species examined which suggested that the device had promise as an amperometric gas sensor.

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“…This effect has previously been observed in other meat products subjected to salting followed by a drying-ripening process (Giolitti et al, 1971;Graham and Blumer, 1971;Van der Riet, 1982;Carrascosa et al, 1988;Huerta et al, 1988;Silla et al, 1989;Rodríguez et al, 1994;García et al, 1995).…”

Section: Microbial Counts Throughout the Manufacturing Processmentioning

confidence: 73%

Study of the Micrococcaceae and Staphylococcaceae throughout the Manufacture of Dry-Cured Lacón (a Spanish Traditional Meat Product) Made without or with Additives

Lorenzo¹,

Fontán²,

Gómez³

et al. 2012

JFR

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Micrococcaceae and Staphylococcaceae were enumerated (on SPC agar + 7.5% NaCl) in samples from the surface and the interior of pieces of dry-cured lacón (a Spanish traditional meat product), at different stages of the manufacturing process, and from six different batches (three made without and three with additives -glucose, sodium nitrite, sodium nitrate, sodium ascorbate, and sodium citrate-). The use of additives did not affect the counts or evolution of this microbial group.For four batches (two without and two with additives), a total of 335 strains were isolated and identified by classical methods.Staphylococcus xylosus was the most abundant and constant species throughout manufacture of the batches made without and with additives. Other species of staphylococci were isolated, including: Staph. equorum, Staph. sciuri, Staph. gallinarum, Staph. cohnii, Staph. intermedius, Staph. capitis, Staph. epidermidis, Staph. simulans and Staph. warneri

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Microbiology and Chemical Changes in Raw Hams of Italian Type

Cited by 42 publications

References 5 publications

Cobalt Phthalocyanine‐Based Molecular Materials for the Electrocatalysis and Electroanalysis of 2‐Mercaptoethanol, 2‐Mercaptoethanesulfonic Acid, Reduced Glutathione and L‐Cysteine

Cobalt Phthalocyanine‐Based Molecular Materials for the Electrocatalysis and Electroanalysis of 2‐Mercaptoethanol, 2‐Mercaptoethanesulfonic Acid, Reduced Glutathione and L‐Cysteine

Voltammetric and amperometric studies of selected thiols and dimethyldisulfide using a screen‐printed carbon electrode modified with cobalt phthalocyanine: Studies towards a gas sensor

Study of the Micrococcaceae and Staphylococcaceae throughout the Manufacture of Dry-Cured Lacón (a Spanish Traditional Meat Product) Made without or with Additives

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