Growth and Inhibition of Microorganisms in the Presence of Sorbic Acid: A Review

1985 ◽  
Vol 48 (4) ◽  
pp. 364-375 ◽  
Author(s):  
MICHAEL B. LIEWEN ◽  
ELMER H. MARTH
Keyword(s):  
Environmental Factors ◽  
Water Activity ◽  
Sorbic Acid ◽  
Microbial Flora ◽  
Effective Inhibitor ◽  
Food Spoilage ◽  
Food Components ◽  
Common Causes ◽  
Activity Temperature ◽  
Antimicrobial Effectiveness

Sorbate (sorbic acid) generally is an effective inhibitor of most molds and yeasts and some bacteria. Environmental factors such as pH, water activity, temperature, atmosphere, microbial load, microbial flora and certain food components can influence the effectiveness of sorbate. Strains of microorganisms resistant to sorbate exist and therefore are common causes of food spoilage. Some molds and bacteria are able to degrade sorbate. This paper reviews the factors that affect the antimicrobial effectiveness of sorbate in foods.

Increased Sensitization of Shrimp Microflora to Hypochlorite following a Sodium Bisulfite Dip1

1984 ◽  
Vol 47 (5) ◽  
pp. 375-377 ◽  
Author(s):  
MARIA L. PYLE ◽  
JOHN A. KOBURGER
Keyword(s):  
Antimicrobial Activity ◽  
Synergistic Effect ◽  
Bacterial Load ◽  
Sodium Bisulfite ◽  
Microbial Flora ◽  
Sequential Treatment ◽  
Antimicrobial Effectiveness ◽  
Iced Storage

Various concentrations of hypochlorite (12.5 to 200 ppm) and sodium bisulfite (0.15 to 2.50%) applied singly and as successive dips were compared for their effect on the microbial flora of shrimp. It was found that sodium bisulfite exhibited antimicrobial activity at all concentrations tested, with a 50% reduction in bacterial numbers at a concentration of 2.5%. Hypochlorite reduced the bacterial load 75% at a concentration of 200 ppm. Under certain conditions a sequential treatment of shrimp with bisulfite, followed by a hypochlorite dip, significantly increased the antimicrobial effectiveness of the hypochlorite. This synergistic effect, however, was not apparent on shrimp following 24 h of iced storage.

scholarly journals Methyl Donor Micronutrients that Modify DNA Methylation and Cancer Outcome

Nutrients ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 608 ◽  
Author(s):  
Abeer Mahmoud ◽  
Mohamed Ali
Keyword(s):  
Dna Methylation ◽  
Environmental Factors ◽  
Critical Role ◽  
Epigenetic Mechanism ◽  
Enzymatic Reactions ◽  
Breast Cancers ◽  
Methyl Donors ◽  
Food Components ◽  
Dietary Nutrient ◽  
Bioactive Food Components

DNA methylation is an epigenetic mechanism that is essential for regulating gene transcription. However, aberrant DNA methylation, which is a nearly universal finding in cancer, can result in disturbed gene expression. DNA methylation is modified by environmental factors such as diet that may modify cancer risk and tumor behavior. Abnormal DNA methylation has been observed in several cancers such as colon, stomach, cervical, prostate, and breast cancers. These alterations in DNA methylation may play a critical role in cancer development and progression. Dietary nutrient intake and bioactive food components are essential environmental factors that may influence DNA methylation either by directly inhibiting enzymes that catalyze DNA methylation or by changing the availability of substrates required for those enzymatic reactions such as the availability and utilization of methyl groups. In this review, we focused on nutrients that act as methyl donors or methylation co-factors and presented intriguing evidence for the role of these bioactive food components in altering DNA methylation patterns in cancer. Such a role is likely to have a mechanistic impact on the process of carcinogenesis and offer possible therapeutic potentials.

Water Activity−Temperature State Diagram of Amorphous Lactose

2005 ◽  
Vol 53 (23) ◽  
pp. 9182-9185 ◽  
Author(s):  
Marianne K. Thomsen ◽  
Lone Jespersen ◽  
Kirsten Sjøstrøm ◽  
Jens Risbo ◽  
Leif H. Skibsted
Keyword(s):  
Water Activity ◽  
State Diagram ◽  
Temperature State ◽  
Activity Temperature ◽  
Amorphous Lactose

Influence of water activity, temperature and time on mycotoxins production on barley rootlets

2006 ◽  
Vol 42 (2) ◽  
pp. 179-184 ◽  
Author(s):  
J.M.M. Ribeiro ◽  
L.R. Cavaglieri ◽  
M.E. Fraga ◽  
G.M. Direito ◽  
A.M. Dalcero ◽  
...  
Keyword(s):  
Water Activity ◽  
Influence Of Water ◽  
Activity Temperature

scholarly journals Orthodontic materials with fluoride have an antimicrobial ability for the prevention of white spot lesions

2021 ◽  
Vol 57 (3) ◽  
pp. 269-274
Author(s):  
Sokol Krasniqi ◽  
Çeljana Toti ◽  
Xhevdet Aliu ◽  
Vanja Vasiljev ◽  
Tomislav Rukavina ◽  
...  
Keyword(s):  
Antimicrobial Properties ◽  
Initial Step ◽  
Negative Control ◽  
Bonding Agent ◽  
Diffusion Method ◽  
Antimicrobial Substances ◽  
Common Causes ◽  
Orthodontic Materials ◽  
Antimicrobial Effectiveness

Aim: Orthodontic brackets during their wear cause demineralization of enamel, which is the initial step in caries development. The prevention of such spots is crucial to ensure healthy teeth, but patients’ compliance is not the most optimal way. The aim of this study was to compare the antimicrobial properties of fluoride-containing orthodontic materials to the materials without additional fluoride. Materials and Methods: Antibacterial effectiveness of orthodontic materials with fluoride – Transbond Plus SEP Bonding agent, Transpond Plus Adhesive agent, Fuji I Band cement, Fuji Ortho LC Adhesive agent, Ortho Solo Bonding agent, and without antimicrobial substances – Transpond XT Bonding agent, Transbond XT Primer were tested with the inhibition on most common causes L. achidophilus (ATCC 4356) and S. mutans (ATCC 10449) and compared to negative control. Antimicrobial effectiveness of each material was measured with the agar diffusion method and expressed with the diameters of inhibition zones around the disk. Results: Materials containing fluoride showed more antimicrobial effectiveness compared to materials without fluoride or negative control (p<0.001), respectively. Materials from the group with no antibacterial substances were not statistically different compared to the negative control (P>0.05). Conclusion: Materials containing fluoride showed more significant antimicrobial effectiveness when compared to the materials without antimicrobial substance and thus might have the potential of antimicrobial properties in vivo.

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