Effects of nonionic surfactants on pigment excretion and cell morphology in extractive fermentation of Monascus sp. NJ1

Abstract

The novel surfactant Brij 35, which has good capacity for pigment extraction and biocompatibility, was identified in the analysis. The effects of nonionic surfactants on the secretion of pigments are related to not only the modification of the cell wall and internal structure but also the CP and HLB. This article is protected by copyright. All rights reserved.

Effect of sodium dodecyl sulfate on the production of L-isoleucine by the fermentation of Corynebacterium glutamicum

“…According to Figure 3(b ), from 2 h to 26 h of fermentation, with the addition of the surfactant SDS, there was an adaptation period that was 2–4 h. At this time, the growth of the strain was slow or even stagnant, but the growth of the strain returned to normal after the adaptation period., in addition, the shorter the adaptation period led to a smaller impact on the growth of strain with a delay in SDS addition [ 16 , 17 ]. It can be seen that the biomass of cells decreased rapidly when 1.5 g/L SDS was added at 34 h of fermentation.…”

“…After adding SDS, the concentration of L-isoleucine in the fermentation broth decreased continuously, and the L-isoleucine concentration decreased by 8.5% at 40 h. The acid production rate was lower than the acid consumption rate of strain, and L-isoleucine showed an inverse growth. From the above experiments results, it can be seen that the addition of surfactants at different stages of the strain has a great impact on the growth and acid production capacity of the strain [ 22 ].…”

Rechargeable self-assembled droplet microswimmers driven by surface phase transitions

“…By coupling the buckling instability with filament extrusion we reveal quantitatively the origin of the partial time-irreversibility of this mode of swimming at low Reynolds numbers 28 and provide some insights into the motion of living microswimmers. Note that the nonionic surfactants used in our study are biocompatible and have been applied in various biosystems, [50][51][52][53][54] although the biocompatibility of our systems with real microorganisms has to be investigated in following studies. We highlight the potential for hydrodynamic studies in the area of active matter by referring to mixed systems of artificial and biological microswimmers which can be explored in diluted or in dense populations to reveal collective effects.…”

Soybean isoflavones reduce citrinin production by Monascus aurantiacus Li AS3.4384 in liquid state fermentation using different media

“…The red yeast rice is considered to have dual functions of food and medicine; it not only symbolizes the precious scientific and cultural heritage of China but is also of great significance in the history of microorganisms around the world. The pigments produced by Monascus have good coloring property, heat stability, stable oxidizing and reducing effects, acid–base properties, stability when exposed to different metal ions and pH, and other advantages . The pigments are widely used as a natural coloring agent for fermented food, especially in the food industry of China, Japan, and other southeast Asian countries …”

“…The pigments produced by Monascus have good coloring property, heat stability, stable oxidizing and reducing effects, acid-base properties, stability when exposed to different metal ions and pH, and other advantages. [14][15][16][17][18][19] The pigments are widely used as a natural coloring agent for fermented food, especially in the food industry of China, Japan, and other southeast Asian countries. 19 However, in the process of fermentation, Monascus can also produce a mycotoxin, citrinin, which is toxic to kidneys, causing teratogenesis, mutagenesis, and carcinogenesis.…”