PMID: 2114547Jan 1, 1990Paper

Growth rate, proteolysis and acid production of Streptococcus faecalis subsp. liquefaciens in skim milk with some additives

Die Nahrung
F Z Hegazi

Abstract

Growth rate, proteolysis and acid production of Streptococcus faecalis subsp. liquefaciens were examined in skim milk with and without 0.15% calcium lactate, 0.03 M Na, K phosphate, 5% CaCO3 or 2-8% NaCl, at 30 degrees C. Calcium lactate affected neither the growth rate nor the breakdown of casein. The highest acid production and degradation of casein occurred in phosphate-buffered skim milk (pH 7.1). Inorganic phosphate did not have any influence on the generation time and hydrolysis of casein. CaCO3, on the contrary, slightly reduced the growth rate and the acid production; proteolysis was markedly decreased. Although 2% NaCl brought about ca. 17% reduction in the number of viable cells, it increased not only the breakdown of casein but the acid production during the exponential phase as well. Higher salt concentrations inhibited growth, acid production and proteolysis. The effect increased with increasing the salt level. An adaptation period of 24 h followed by little growth was observed in milk containing 8% NaCl.

Citations

Oct 12, 2005·International Journal of Food Microbiology·M R Foulquié MorenoL De Vuyst
Jun 23, 2011·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Chang-Bin WeiGuang-Ming Sun

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

© 2021 Meta ULC. All rights reserved