The effect of fluctuating temperatures on microbial growth is important in the passage of foods from production to consumption. Suspensions of Salmonella typhimurium have been subjected to sinusoidally time-varying temperatures of periods from 60 to 240 min between 4 degrees and 22 degrees C, that is within and below the growth temperature range. The suspensions were prepared with two concentrations of sodium chloride and adjusted to two different values of pH. The change in the numbers of viable bacteria was measured with time and the experimental growth curves and average generation times compared with predictions based on isothermal growth data. Generally, the experimental average generation times exceeded the predictions by not more than 10%. In enumerating viable bacteria in the suspensions containing 3.5% (w/v) sodium chloride it was necessary to use sodium chloride in the diluent and recovery medium in order to recover the bacteria quantitatively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1365-2672.1995.tb00925.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Caspase 3/GSDME-Mediated Corneal Epithelial Pyroptosis Promotes Dry Eye Disease.
Invest Ophthalmol Vis Sci
January 2025
Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, China.
Purpose: Dry eye disease (DED) is a common ocular surface inflammatory disease with a complex pathogenesis. Herein, the role and effect of gasdermin E (GSDME) in DED pathogenesis were explored.
Methods: In vitro, flow cytometry, Cell Counting Kit-8 (CCK-8) and lactate dehydrogenase (LDH) release assays were used to determine the effects of hyperosmotic stress on pyroptosis, apoptosis, and cell viability in human corneal epithelial cells (HCECs).
Coordinated Synthesis of Pigments Differing in Side Chain Length in and Investigation of Pigments and Citrinin Relation.
J Agric Food Chem
January 2025
Department of Biotechnology, University of Chemistry and Technology Prague, Technicka 5, Prague CZ166 28, Czechia.
The fungi have traditionally been used in Asia for food coloring. Unfortunately, the most well-known species, , very often produce mycotoxin citrinin in addition to pigments, which poses a significant problem for the use of pigments in foods. There is a step in pigment biosynthesis where a side chain of five or seven carbons is attached to the tetraketide, the product of polyketide synthase, resulting in the formation of pigments in pairs.
View Article and Find Full Text PDFDFT-Based Polarizable Ion Models for Molten Rare-Earth Chlorides: From Lanthanum to Europium.
J Phys Chem B
January 2025
Sorbonne Université, CNRS, Physicochimie des Électrolytes et Nanosystèmes Interfaciaux, F-75005 Paris, France.
We developed a systematic polarizable force field for molten trivalent rare-earth chlorides, from lanthanum to europium, based on first-principle calculations. The proposed model was employed to investigate the local structure and physicochemical properties of pure molten salts and their mixtures with sodium chloride. We computed densities, heat capacities, surface tensions, viscosities, and diffusion coefficients and disclosed their evolution along the lanthanide series, filling the gaps for poorly studied elements, such as promethium and europium.
View Article and Find Full Text PDFGrowth performance, antioxidant, and immune responses of Nile tilapia (Oreochromis niloticus) fed on low-fishmeal diets enriched with sodium chloride and its adaptability to different salinity levels.
Fish Physiol Biochem
January 2025
Department of Fish Biology and Ecology, Central Laboratory for Aquaculture Research, Agricultural Research Center, Abbassa, Abo-Hammad, 44662, Sharqia, Egypt.
The current investigation assessed the beneficial impacts of dietary sodium chloride (NaCl) on the growth performance, oxidant/antioxidant, and immune responses of Nile tilapia (Oreochromis niloticus) and its adaptability to different salinity levels. After acclimating the fish to the laboratory conditions for 2 weeks, the acclimated fish (10.5 ± 0.
View Article and Find Full Text PDFExploring Stibanyl Ligand for Accessing Arsinidene and Arsaketene Adducts, and Phosphaketene.
Inorg Chem
January 2025
College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, China.
The salt metathesis reaction involving a diamine-based antimony chloride precursor with sodium arsaethynolate in the presence of PMe leads to the formation of stibanyl-functionalized PMe-arsinidene (). Detailed analyses through single-crystal X-ray diffraction and density functional theory of confirm the presence of covalent Sb-As bonds and reveal its polarized nature with a multiple-bond character. In contrast to the formation of complex , substituting PMe with xylyl isocyanide or 1,3-diisopropyl-4,5-dimethyl-imidazolin-2-ylidene () produces an isocyanide-arsinidene adduct () and an -arsaketene complex (), respectively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!