Dergiler / Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi / 2019 / Cilt: 16 - Sayı: 2
Physicochemical Properties of Low-Fat Yoghurt with Whey Protein Isolates as Fat Alternative
- Sayfa
- 223–230
- DOI
- —
Özet
In this research, the effect of whey protein isolates (WPI) as a fat alternative on the physicochemical properties of low-fat (1-2 %) yoghurt samples during 14 days of storage was determinated. The samples were analyzed for their chemical composition, syneresis, tyrosine, firmness, color, and free fatty acids. Yoghurt having 2 % of WPI showed significantly higher amount of tyrosine but lower syneresis; as total solids, protein, and fat were higher than the low-fat yoghurts (1% WPI and low-fat control, p < 0.05). However, WPI addition decreased the white and green tones but increased the yellow; thus, the addition of WPI didn’t affect the opacity and brightness of low-fat yoghurt. The addition of WPI also gave rise to the amounts butyric, capric, and oleic acids during storage (p < 0.05). Herein we propose 2 % WPI as a fat alternative to improve the physicochemical properties of low-fat for a storage duration of 14 days.
Abstract
Since plants need various plant nutrients during their development process, these needs are met with synthetic and chemicals inputs. This increases the input cost considerably. However, such problems can be eliminated thanks to the inputs obtained from completely natural plant wastes. Ash obtained from sunflower plant wastes, especially those used as fuel, has the potential to be an important natural fertilizer with plant nutrient elements in its content. In this study, it was aimed to determine some plant nutrients (B, Mg, P, K) found in the ashes obtained from burning of different variety (Coral, Pioneer63F73, PioneerP64LL05, Pioneer64LC108, Goldsun, Şems, Aga1301, Duna, Bosfora ve PioneerPR64G46) of sunflower plant wastes. As a result of the study, the highest B and Mg content was obtained from Pioneer PR64G46, P and Ca content from Pioneer P64LL05 and K content from Pioneer 64LC108. Observations show that the ash of the sunflower wastes has a very high content of phosphorus and potassium, and that these ashes can be used as fertilizers, especially in phosphorous and potassium-poor soils.