Dependence of bacterial growth rate on dynamic temperature changes

Dey, Abhishek; Bokka, Venkat; Sen, Shaunak

doi:10.1049/iet-syb.2018.5125

Cited by 17 publications

(10 citation statements)

References 33 publications

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“…The activity of bacterial growth is affected by temperature [ 34 , 35 ]. The variation of bacterial growth rate with temperature is a complex process, and the Arrhenius equation suggests that the maximum specific growth rate of bacteria is temperature-dependent [ 36 ]. The Verhulst–Pearl model and its variants, such as the Richards model [ 37 ], the generalized logistic growth model, the Gompertz model [ 38 ], and the Monod bacterial growth model [ 39 ], have all been used to describe the growth of bacteria in conditions of dynamic temperature.…”

Section: Resultsmentioning

confidence: 99%

Efficient Removal of Dental Plaque Biofilm from Training Typodont Teeth via Water Flosser

Wang,

Gao,

Chang

et al. 2023

Bioengineering

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Plaque biofilms play critical roles in the development of dental caries. Mechanical plaque control methods are considered to be most effective for plaque removal, such as brushing teeth or using flosser. Recently, water flosser has been paid much attention. Here, we tested the ability of a water flosser to remove the adhered sucrose and the dental plaque biofilms formed by Streptococcus mutans, Streptococcus sanguinis, and Actinobacillus viscosus. We found that the residual sucrose concentration was 3.54 mg/mL in the control group, 1.75 mg/mL in the syringe group (simulating the ordinary mouthwash), and 0 mg/mL in water flosser group. In addition, the residual bacterial concentration was 3.6 × 108 CFU/mL in the control group, 1.6 × 107 CFU/mL in the syringe group, and only 5.5 × 105 CFU/mL in the water flosser group. In summary, water flosser is effective for cleaning the teeth, which may have significant potential in preventing dental caries and maintaining oral health.

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Section: Resultsmentioning

confidence: 99%

Efficient Removal of Dental Plaque Biofilm from Training Typodont Teeth via Water Flosser

Wang,

Gao,

Chang

et al. 2023

Bioengineering

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“…Environmental conditions affect almost all physical and biological processes. Ensuring robustness in performance during varying environmental conditions can be an important requirement in these processes [19]. In addition, the conditions during growth also influence subsequent survival [20].…”

Section: Methodsmentioning

confidence: 99%

“…Industrial process is largely affected by growth rate of the organism such as yeasts. Thus, microbial growth rate is an important parameter and it is necessary to understand how this parameter depends on temperature [19,21]. This can provide us important insight regarding role of temperature in these processes as well as can help design techniques to enhance robustness to temperature variations.…”

Section: Methodsmentioning

confidence: 99%

“…This can provide us important insight regarding role of temperature in these processes as well as can help design techniques to enhance robustness to temperature variations. While the dependence of yeast growth on different temperatures has been well studied for many species, prediction of yeast growth rate for dynamic temperature changes is relatively unclear [19]. In this work we studied the effect of temperature changes (25-37℃) and pH (5.0 and 6.5) of media in the SGR of S. cerevisiae yeasts (Fig.…”

Section: Methodsmentioning

confidence: 99%

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Peculiarities of Growth Parameters of $Saccharomyces~cerevisiae$ Under Different Conditions

Shirvanyan¹,

Mirzoyan²,

Trchounian³

2021

Proc. YSU B: Chem. Biol. Sci.

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Saccharomyces cerevisiae is an essential component of human civilization because of its extensive use in food industry. At the point of industrial usage it is very important to get large amount of biomass but many factors causes yeast's viability loss and death. The aim of this work was to study the peculiarities of growth parameters – specific growth rate (SGR, μ, growth yield) of S. cerevisiae wine and beer strains under different external conditions, as well as pH and oxidation-reduction potential (ORP) changes during growth. It was shown that under aerobic cultivation, the conditions 30℃ and pH 6.5 are more favorable for the growth of 2 strains (ATCC 9804, μ = 0.398; ATCC 13007, μ = 0.407), where they can enhance the biomass, and under microaerobic conditions the pH 5.0 and 37℃ are more favorable (ATCC 9804, μ = 0.35; ATCC 13007, μ = 0.436). During aerobic conditions, lower ORP values are established which did not depend on growth temperature and external pH. Under microaerobic conditions until the establish¬ment of the stationary phase (24 h) pH dependent changes of ORP were established. Obtained results will help to clarify the biochemical, biophysical and bioenergetic phenomena of yeast survival that can enhance the biomass growth and yield and thus applied industrial scale.

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“…To determine the optimum temperature for cell growth, strain 1A02591 was cultured at 45, 50, 55, 60, or 65 • C in a liquid 2216E medium (0.5% Bacto peptone, 0.1% yeast extract and artificial seawater, pH 7.5) in 50 mL Erlenmeyer fasks, which were controlled under the atmospheric pressure and constant agitation (180 rpm). The OD 600 of the cultures was monitored at an interval of 2 h. The growth rate of strain 1A02591 was measured by the increment of OD 600 per hour at each temperature and was analyzed by DMfit v3.5 using Gompertz model (Baranyi and Roberts, 1994;Dey et al, 2020). To determine the optimum temperature for extracellular protease production, strain 1A02591 was cultured at 45, 50, 55, 60, or 65 • C in 50 mL fermentation medium (0.3% casein, 0.2% yeast extract and artificial seawater, pH 7.5) in 500 mL Erlenmeyer fasks, which were controlled under the atmospheric pressure and constant agitation (180 rpm).…”

Section: Analysis Of the Optimum Temperature For Cell Growth And Extrmentioning

confidence: 99%

Characterization and Diversity Analysis of the Extracellular Proteases of Thermophilic Anoxybacillus caldiproteolyticus 1A02591 From Deep-Sea Hydrothermal Vent Sediment

Cheng

Wang²,

Zhang³

et al. 2021

Front. Microbiol.

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Protease-producing bacteria play key roles in the degradation of marine organic nitrogen. Although some deep-sea bacteria are found to produce proteases, there has been no report on protease-secreting Anoxybacillus from marine hydrothermal vent regions. Here, we analyzed the diversity and functions of the proteases, especially the extracellular proteases, of Anoxybacillus caldiproteolyticus 1A02591, a protease-secreting strain isolated from a deep-sea hydrothermal vent sediment of the East Pacific Ocean. Strain 1A02591 is a thermophilic bacterium with a strong protease-secreting ability, which displayed the maximum growth rate (0.139 h–1) and extracellular protease production (307.99 U/mL) at 55°C. Strain 1A02591 contains 75 putative proteases, including 65 intracellular proteases and 10 extracellular proteases according to signal peptide prediction. When strain 1A02591 was cultured with casein, 12 proteases were identified in the secretome, in which metalloproteases (6/12) and serine proteases (4/12) accounted for the majority, and a thermolysin-like protease of the M4 family was the most abundant, suggesting that strain 1A02591 mainly secreted a thermophilic metalloprotease. Correspondingly, the secreted proteases of strain 1A02591 showed the highest activity at the temperature as high as 70°C, and was inhibited 70% by metalloprotease inhibitor o-phenanthroline and 50% by serine protease inhibitor phenylmethylsulfonyl fluoride. The secreted proteases could degrade different proteins, suggesting the role of strain 1A02591 in organic nitrogen degradation in deep-sea hydrothermal ecosystem. These results provide the first insight into the proteases of an Anoxybacillus strain from deep-sea hydrothermal ecosystem, which is helpful in understanding the function of Anoxybacillus in the marine biogeochemical cycle.

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Dependence of bacterial growth rate on dynamic temperature changes

Cited by 17 publications

References 33 publications

Efficient Removal of Dental Plaque Biofilm from Training Typodont Teeth via Water Flosser

Efficient Removal of Dental Plaque Biofilm from Training Typodont Teeth via Water Flosser

Peculiarities of Growth Parameters of $Saccharomyces~cerevisiae$ Under Different Conditions

Characterization and Diversity Analysis of the Extracellular Proteases of Thermophilic Anoxybacillus caldiproteolyticus 1A02591 From Deep-Sea Hydrothermal Vent Sediment

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