Annihilation of Extremely Halophilic Archaea in Hide Preservation Salt Using Alternating Electric Current

Birbir, Yasar; Anik, Sema; Birbir, Meral; Çağlayan, Pınar

doi:10.1595/205651315x686741

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Excellent work done by Birbir and her coworkers (Birbir et al, 2006(Birbir et al, , 2008a(Birbir et al, , 2008c(Birbir et al, , 2008d(Birbir et al, , 2013b(Birbir et al, , 2013c(Birbir et al, , 2013d(Birbir et al, , 2014(Birbir et al, , 2015a(Birbir et al, , 2015b is notable in the electric inactivation of bacteria, especially halophilic ones, in hide-brine curing and soaking liquors. In 2006, they first investigated the effect of low-level, direct electric current on the inactivation of different kinds of extremely halophilic bacteria in brine solutions and this technique may be used in the leather industry (Birbir et al, 2006).…”

Section: Electric Currentmentioning

confidence: 97%

“…Inactivation of bacteria by electric currents has received much attention due to its high efficiency, low cost, and ease of application (Birbir et al, 2006(Birbir et al, , 2008a(Birbir et al, , 2008c(Birbir et al, , 2008d(Birbir et al, , 2013b(Birbir et al, , 2013c(Birbir et al, , 2013d(Birbir et al, , 2014(Birbir et al, , 2015a(Birbir et al, , 2015b. Although mechanisms for microbial inactivation by low-level direct electric current has not yet fully understood, it is assumed that the completeness of the bacterial membrane and/or electrolyze molecules on the cell surface may be damaged by the electric current (Birbir et al, 2006).…”

Section: Electric Currentmentioning

confidence: 99%

See 1 more Smart Citation

Recent progress in cleaner preservation of hides and skins

Zhao

Xiong

et al. 2017

Journal of Cleaner Production

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The raw hides and skins are flayed from animals and further processed into leathers. As the main constituent of raw skins and hides is protein, these materials are highly susceptible to bacterial action. Therefore, adequate preservation of hides and skins is crucial in slaughterhouses and tanneries. Preservation using salt remains the most popular curing technique worldwide due to its ease, cost-effectiveness and the quality of the finished leather produced. The use of salt (approximately 40-50% on raw hides/skins weight) enhances the pollution load of tannery effluent, however, which becomes highly contaminated with increased total dissolved solids (TDS) and chlorides (Cl-). To overcome this hurdle, researchers are constantly searching for alternative preservation techniques which are either totally void of salt or use only a small amount of salt. Based on the literatures published mainly in the past decade, this review systematically and comprehensively summarizes current status and development trend about the cleaner preservation methods used in curing and soaking processes. The discussed salt-less curing methods contain NaCl + EDTA, NaCl + silica gel, NaCl + sodium meta-bisulphite and NaCl + boric acid, while the illustrated alternatives used in salt-free curing methods include potassium chloride (KCl), sodium sulphate (Na 2 SO 4), silicate and peracetic acid. Emphasis is put on natural preservatives (paste plant formulations, essential oils, chlorophyll and bacteriocins), polyethylene glycol (PEG), ozone and physical preservative methods containing electric current, chilling and vacuum. Furthermore, several proposals are addressed for the development of eco-friendly and efficient preservation methods for hides and skins.

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Section: Electric Currentmentioning

confidence: 97%

Section: Electric Currentmentioning

confidence: 99%

Recent progress in cleaner preservation of hides and skins

Zhao

Xiong

et al. 2017

Journal of Cleaner Production

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show abstract

“…The researchers dissolved the salt samples in brine solutions and applied 2A AC for 25 min. They reported that 2A alternating electric current for 1 min was enough to kill extremely halophilic archaea, proteolytic extremely halophilic archaea and lipolytic extremely halophilic archaea found in salt samples [31].…”

Section: Mixed Culture Of Gram-negative (Enterobacter Cloacae Vibriomentioning

confidence: 99%

“…Moreover, extermination effect of 2A alternating electric current on extremely halophilic archaea, proteolytic extremely halophilic archaea and lipolytic extremely halophilic archaea isolated from Tuz Lake in Turkey was examined [31].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Inactivation of Proteolytic and Lipolytic Hide Bacteria

Birbir¹,

Birbir²,

Yılmaz³

et al. 2016

IJBBB

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Proteolytic and lipolytic bacteria may be found in hide-soak liquors. These microorganisms may affect leather quality adversely and cause important economic losses. Therefore, we examined lethal effect of 1 A DC treatment implemented with 1.5 A AC on mixed culture of Gram-positive and Gram-negative hide bacteria in Nutrient Broth containing 3% NaCl in this study. Proteolytic and lipolytic Gram-positive Bacillus lentus, Staphylococcus intermedius, Aerococcus viridans and Enterococcus avium, Gram-negative Enterobacter cloacae and Pseudomonas putida, which were isolated from hide soak liquor in our previous study, were used as test microorganisms in this study. Log10 reduction factors of 1.40, 1.62, 2.00 and 2.10 belonging to the mixed culture were detected after first, second, third and fourth cycles of electric current treatments, respectively. This study results exhibited that the electric treatment was efficient in reducing the cell counts of microorganisms found in hide-soak liquors.

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“…En el caso de que la sal no sea previamente esterilizada, se deberían explorar otras posibilidades, como las planteadas por Birbir et al (2015Birbir et al ( , 2015b, mediante el uso de corrientes eléctricas para esterilizar las salmueras. Esta metodología es económica, rápida y permite la completa erradicación de las arqueobacterias halofílicas extremas (proteolíticas y lipolíticas).…”

Section: Vi3 Recomendacionesunclassified

Archeas halófilas como causa de alteraciones en tripas bovinas saladas.

Pepe¹,

María²

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The main objective of this study was the analysis, description, characterization and impact of red, orange or purple colorations observed in salted bovine casings (intestines), ready for marketing. To achieve this, over the course of three years, an investigation was conducted in two slaughterhouses to assess the industrial process of obtaining cattle intestines (primary process); and three tripe shops to study the secondary process of obtaining salted bovine casings. A salt processing establishment was also visited. A sensory evaluation of the contaminated products was performed, and samples of salt, bovine casings, and water were collected and subjected to physico-chemical, microbiological, molecular, and histological analyses. Our study concludes that the microorganisms responsible for the color alterations are extremely halophilic archae, Haloarcula, Halogranum or Haloterrígena and Haloferax being the identified Genus. Archaea enter the system by cross-contamination through food grade salt. Our studies show that an extremely low load of extremely halophilic archaea is sufficient for its development. On the other hand, a low incidence of the problem was found, between 2.3% and 3%, further studies must be developed for a better definition in this regard. According to our observations red, orange and purple colorations can be found in the salt and brine from the surface of open-head drums with only 20 days of storage, and up to a year and a half. Furthermore, the scanning electron microscopy and histological studies showed that these halophilic microorganisms can form biofilms, adhering to the casings' surface, altering its histological structure, and therefore their properties when making sausages. In the establishments surveyed it was found that, despite all the measures taken to ensure product quality and safety (GMP, SSOP and HACCP), quality changes in the product were present. We conclude that this is a problem underestimated at an industrial level, and where preventive measures play a major role.

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Annihilation of Extremely Halophilic Archaea in Hide Preservation Salt Using Alternating Electric Current

Cited by 7 publications

References 2 publications

Recent progress in cleaner preservation of hides and skins

Recent progress in cleaner preservation of hides and skins

Electrochemical Inactivation of Proteolytic and Lipolytic Hide Bacteria

Archeas halófilas como causa de alteraciones en tripas bovinas saladas.

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