scholarly journals Multiple Light Scattering Measurements for Online Monitoring of Milk Fermentation

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1582
Author(s):  
Mohsen Ramezani ◽  
Giovanna Ferrentino ◽  
Ksenia Morozova ◽  
Matteo Scampicchio

The present paper investigates the use of multiple light scattering for the monitoring of milk fermentation. The experiments were performed on milk fermented with different starter concentrations (0.05% to 4.5% (w/w) at temperatures from 36 to 44 °C and in the presence of antibiotics at concentrations up to 100 µg/kg. The fermentation was monitored continuously by using a multiple light scattering technique and simultaneously by a pH meter, a rheometer and a texture analyzer. The backscattering signal recorded by multiple light scattering measurements was correlated with the changes in pH, rheological parameters and firmness of the samples along the fermentation. A gelation time of 120 min was obtained when the highest concentration of starter (4.5%, w/w) and incubation temperature of 44 °C were used. These results were confirmed by the pH, rheological and texture monitoring. The analysis of backscattering spectra allowed the detection of the effect of antibiotic on the gel formation even at low concentrations (1.3 µg/kg). Overall, the results highlighted the advantages of using a multiple light scattering technique as quality control tool for online monitoring of milk fermentation.

2004 ◽  
Author(s):  
Hiromasa Suzuki ◽  
Takamitsu Okumura ◽  
Akihiro Tagaya ◽  
Eizaburo Higuchi ◽  
Yasuhiro Koike

2009 ◽  
Vol 1193 ◽  
Author(s):  
Sumit Kumar ◽  
B.S. Tomar ◽  
V.K. Manchanda

AbstractKinetics of formation of intrinsic colloids by tetravelent metal ions, namely, Th(IV), Hf(IV) and Pu(IV) have been studied using the dynamic light scattering technique. The milli-molar solutions of Hf(IV) and Th(IV) were prepared at varying pH (2-4) and ionic strength (0-0.01 M) and the samples were subjected to dynamic light scattering measurements at regular intervals for few days. The results showed that the size of intrinsic colloids varies with pH and ionic strength. In the case of Pu(IV) the concentration of aqueous solutions was 4.5×10−5 M.


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