17 research outputs found
The effect of processing parameters on the structure of fermented milk products with transglutaminase addition
This study is concerned with the effect of concentration of transglutaminase
(TG), content of milk fat and starter culture type (probiotic and kombucha)
on the structure of fermented milk products. The application of TG
significantly improved textural characteristics of the fermented milk
products. The firmness of the samples produced from milk with 0.1g100g-1 and
0.9g100g-1 fat content with probiotic starter were by 33% and 17.6% higher,
respectively, compared to the control samples. During ten days of storage,
the value of the hysteresis loop area of all samples produced from milk with
0.9g100g-1 fat content with TG addition, decreased by 14%. [Projekat
Ministarstva nauke Republike Srbije, br. 46009
Correlation of the microstructure with viscosity and textural properties during milk fermentation by kombucha inoculum
The aim of this study was to examine the changes in the microstructure,
textural properties and viscosity of the gel formed during milk fermentation
with kombucha inoculum and to establish a relationship between the
microstructure and these properties. The values of the analyzed
characteristics were measured during the gelation at 42°C at the following
pHs: 5.4, 5.1, 4.8 and 4.6. The microstructure analysis revealed
disappearance of coarse cluster structure and appearance of finer casein
micelles network during fermentation. The obtained results showed significant
differences in them viscosity and textural properties during fermentation,
which is in accordance with their microstructure. The correlation of the
examined properties and microstructure of the gel was established. [Projekat
Ministarstva nauke Republike Srbije, br. 46009
Influence of fat content and starter cultures on the quality of fermented dairy products
The objective of this study was to investigate the effect of fat content and
type of the starter culture (traditional or probiotic) on physico-chemical
quality, rheological and textural characteristics of the fermented dairy
products during 14 days of storage. Seven different fermented dairy products
of two different groups: stirred and set yoghurts were used in this study.
The rheological and textural characteristics of the analyzed type of
fermented dairy products after the production and during storage are
dependent on the chemical composition, particularly fat content. [Projekat
Ministarstva nauke Republike Srbije, br. III 46009
The effect of fermentation temperature on the functional dairy product quality
The aim of this study was to examine the possibility of fermented dairy beverage production by the application of kombucha cultivated on thyme tea in combination with a probiotic starter and to evaluate the quality of the new functional product. Fermented dairy beverages are produced from milk with 1.6% milk fat at three fermentation temperatures: 37°C, 40ºC and 43ºC.Chemical quality, rheological properties and products of added starter cultures metabolism were determined in the fermented dairy beverages after production and after10 days of storage. Produced fermented dairy beverages have reduced milk fat content and good textural characteristics. Besides the highly valuable milk components, they contain numerous compounds which have pronounced therapeutic properties. These products could be used as functional food in the diet of different populations for health improvement
Volatile compounds of functional dairy products
Volatile compounds, affecting flavour of traditional and probiotic fresh cheese, were determined. Functional dairy product-fresh cheese was produced from milk of 2.5% fat content and milk of 4.2% fat content, under the semi-industrial conditions. The traditional starter culture Flora Danica (FD) and a combination of probiotic starter ABT-1 and FD (ABT-1:FD=1:1) were applied as starters. The volatile fractions were isolated by employing the combined simultaneous distillation-extraction technique (SDE). The compounds were identified by gas chromatography - mass spectrometry (GC-MS) and quantified by using standard procedure. Following 19 compounds have been identified: 8 hydrocarbons (decane, undecane, tridecane, tetradecane, pentadecane, hexadecane, octadecane and 2, 6, 10, 14-tetramethyl hexadecane); 6 ketones (2-heptanone, 2-nonanone, 2- undecanone, 2-pentadecanone, 2-heptadecanone and 2-tridecanone); 3 aldehydes (nonanal, tetradecanal and hexadecanal); 1 fatty acid (decanoic acid) and disulfide, bis (1-methylethyl). The highest levels were associated with hexadecanal, 2-pentadecanone, 2-tridecanone, and 2-undecanone in all examined samples, regardless to the starter culture and type of milk used. [Projekat Ministarstva nauke Republike Srbije, br. 46009