Physiological modelling of the response of Kocuria rosea exposed to changing water activity

Phillip C. Wright; Tsuyoshi Tanaka

doi:10.1023/A:1015010908732

Physiological modelling of the response of Kocuria rosea exposed to changing water activity

Phillip C. Wright, Tsuyoshi Tanaka

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Physiological effects of NaCl concentration (equivalent water activities, a_w, 1 to 0.87) were investigated with the moderately halophilic and piezotolerant bacterium, Kocuria rosea (formerly Micrococcus roseus), grown in bacteriological peptone/yeast extract broth. This bacterium, which was isolated from open shallow seawater, can grow in 150 g NaCl 1^-1 (optimum NaCl concentration: 30 g 1^-1, a_w = 0.984) and under 207 MPa of hydrostatic pressure. The effects of water activity on µ_m can be quantitatively predicted, to a high level of accuracy by application of the Aiba/Edwards, and the Levenspiel-type unstructured inhibition-type kinetic models.

Original language	English
Pages (from-to)	603-609
Number of pages	7
Journal	Biotechnology Letters
Volume	24
Issue number	8
DOIs	https://doi.org/10.1023/A:1015010908732
Publication status	Published - 2002

Keywords

Extremophile
Halophile
Micrococcus roseus
Piezophile
Unstructured kinetic inhibition models

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10.1023/A:1015010908732

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title = "Physiological modelling of the response of Kocuria rosea exposed to changing water activity",

abstract = "Physiological effects of NaCl concentration (equivalent water activities, aw, 1 to 0.87) were investigated with the moderately halophilic and piezotolerant bacterium, Kocuria rosea (formerly Micrococcus roseus), grown in bacteriological peptone/yeast extract broth. This bacterium, which was isolated from open shallow seawater, can grow in 150 g NaCl 1-1 (optimum NaCl concentration: 30 g 1-1, aw = 0.984) and under 207 MPa of hydrostatic pressure. The effects of water activity on µm can be quantitatively predicted, to a high level of accuracy by application of the Aiba/Edwards, and the Levenspiel-type unstructured inhibition-type kinetic models.",

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AU - Wright, Phillip C.

AU - Tanaka, Tsuyoshi

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N2 - Physiological effects of NaCl concentration (equivalent water activities, aw, 1 to 0.87) were investigated with the moderately halophilic and piezotolerant bacterium, Kocuria rosea (formerly Micrococcus roseus), grown in bacteriological peptone/yeast extract broth. This bacterium, which was isolated from open shallow seawater, can grow in 150 g NaCl 1-1 (optimum NaCl concentration: 30 g 1-1, aw = 0.984) and under 207 MPa of hydrostatic pressure. The effects of water activity on µm can be quantitatively predicted, to a high level of accuracy by application of the Aiba/Edwards, and the Levenspiel-type unstructured inhibition-type kinetic models.

AB - Physiological effects of NaCl concentration (equivalent water activities, aw, 1 to 0.87) were investigated with the moderately halophilic and piezotolerant bacterium, Kocuria rosea (formerly Micrococcus roseus), grown in bacteriological peptone/yeast extract broth. This bacterium, which was isolated from open shallow seawater, can grow in 150 g NaCl 1-1 (optimum NaCl concentration: 30 g 1-1, aw = 0.984) and under 207 MPa of hydrostatic pressure. The effects of water activity on µm can be quantitatively predicted, to a high level of accuracy by application of the Aiba/Edwards, and the Levenspiel-type unstructured inhibition-type kinetic models.

KW - Extremophile

KW - Halophile

KW - Micrococcus roseus

KW - Piezophile

KW - Unstructured kinetic inhibition models

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DO - 10.1023/A:1015010908732

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SN - 1573-6776

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SP - 603

EP - 609

JO - Biotechnology Letters

JF - Biotechnology Letters

IS - 8

ER -

Physiological modelling of the response of Kocuria rosea exposed to changing water activity

Abstract

Keywords

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