Effect of preparation method on physicochemical, scavenging, and proliferative properties of gelatin from Yak skin

Abstract

Gelatin as a high molecular weight protein and has been extensively applied in diverse fields, such as food, cosmetics, pharmaceuticals, and photography, in which it acts as a thickener, stabilizer,

Cyprinus carpio Skeleton Byproduct as a Source of Collagen for Gelatin Preparation

“…For Nile tilapia skins and Nile perch skins, the WHC values are 6.4 g/g and 6.9 g/g, respectively [ 45 ]; several of our gelatins approach these values. Gelatins prepared from yak skins showed very low WHC values; depending on the preparation and drying conditions it was 0.40–0.47 g/g, which are relatively low values compared to our gelatins [ 50 ]. In our previous study on the preparation and characterization of chicken skin gelatins, we found WHC 3.85–5.58 g/g, depending on extraction conditions [ 51 ], which are almost the same values as for our highest-quality fish gelatins.…”

“…For Nile tilapia skins and Nile perch skins, the FBC values are 4.7 g/g and 3.6 g/g [ 45 ], which are values comparable to our gelatins. Gelatins prepared from yak skins showed very low FBC values; depending on the preparation and drying conditions it was 0.16–0.20 g/g [ 50 ]. In our aforementioned study on chicken skin gelatins, FBC was very low (0.97–1.26 g/g) compared to fish gelatin, while commercial porcine (260 Bloom) and bovine gelatins (260 Bloom) did not differ significantly (0.42 g/g and 0.71 g/g) [ 51 ].…”

“…In further research into the processing of Cyprinus carpio skeletons into gelatins, if desired for the final applications of gelatins we recommend focusing on the improvement of specific gel-forming properties of gelatins, especially melting point and gelling point, or alternatively gel strength as well as surface properties, especially foaming capacity and stability, e.g., by adjusting the conditions in the conditioning of the raw material, in the extraction of gelatins, and in the finalization of gelatins. Yang et al, who prepare gelatins from Yak skin, have shown that a suitable drying method can significantly improve the functional properties of gelatins; they favor freeze drying as the best method [ 50 ].…”

Preparation of antioxidant peptides from yak skin gelatin and their protective effect on myocardial ischemia reperfusion injury

“…Freeze-dried enzymatic hydrolyzed gelatin is a suitable raw material for preparing gelatin with enhanced biological activity. 18 The hydrolysis and structural characteristics of YSG hydrolysis suggest that YSG subjected to moderate ultrasound (5 min) has great potential as an antioxidant. 19 However, there are few reports on other functional activities of YSG.…”