Changes in texture of yogurt from goat’s milk modified by transglu-taminase depending on pH of the milk

Set yogurt from goat?s milk with adjusted pH to 6,4, 6,3, 6,2 and 6,1 and than modified by microbial transglutaminase (TGase) were produced. Control yogurt was produced from goat?s milk of pH 6,4 but without modification by TGase. In yogurt determined sensory quality, pH, texture parameters and syneresis. Modification of goat?s milk by TGase caused an increase in apparent viscosity, hardness and adhesiveness of the yogurt. The pH of the milk incubated with TGase in the range 6.4- 6.1 has no influence on such texture parameters like viscosity, hardness, adhesiveness, extrusion force and syneresis. The pH and extrusion force of the stored yogurts was significantly lower than the values of these parameters in fresh yogurts.

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The Effect of “Bile” Banana (Musa Paradisiaca) Maturity Level on Microbiological, Chemical and Sensory Quality of Goat’s Milk Kefir

10.2991/absr.k.220101.036 ◽

2022 ◽

Author(s):

Satrijo Saloko ◽

Mutia Devi Ariyana ◽

Nadiah Khoiroh

Keyword(s):

Sensory Quality ◽

Maturity Level ◽

Musa Paradisiaca ◽

Goat’S Milk ◽

Goat's Milk

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Estimation of Aflatoxin M1 Levels in Some Dairy Products Manufactured from Raw Milk Experimentally Inoculated with Toxin

The Iraqi Journal of Veterinary Medicine ◽

10.30539/iraqijvm.v43i1.471 ◽

2019 ◽

Vol 43 (1) ◽

pp. 50-58

Author(s):

H. S. Alnaemi

Keyword(s):

Dairy Products ◽

Raw Milk ◽

Aflatoxin M1 ◽

Consumer Health ◽

Goat’S Milk ◽

White Cheese ◽

Elisa Technique ◽

Permissible Levels ◽

Goat's Milk

Fate of AflatoxinM1 in soft white cheese and its by-product (whey) and in yogurt locally made from raw sheep's and goat's milk experimentally inoculated with 0.05 and 0.5 µg/l AflatoxinM1 were investigated using ELISA technique. Results reported that AflatoxinM1 was concentrated in cheese at levels significantly higher than that recorded in the raw milk that used for its processing, with a significant decrease in AflatoxinM1 levels in its by-product (whey) comparable to the raw milk used in manufacturing at both inoculated levels. Yogurt produced from raw sheep's milk at second inoculated level exerted AflatoxinM1concentration significantly lower than that present in the milk. Significant differences in AflatoxinM1distribution in cheese and whey produced from sheep's milk comparable to their counterparts produced from goat's milk were recorded. Finally, results revealed the efficacious role of the various dairy manufacturing processes in AflatoxinM1 distribution and the necessity to issue of local legislations concerning the maximum permissible limits for AflatoxinM1 in milk in order to stay within the universal permissible levels for AflatoxinM1 in dairy products to provide greater protection for consumer health.

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PRODUCTION AND UTILIZATION OF GOAT'S MILK IN SOFT CHEESE MAKING

Journal of Food and Dairy Sciences ◽

10.21608/jfds.2012.75290 ◽

2012 ◽

Vol 3 (1) ◽

pp. 23-32

Author(s):

Hanaa Sakr

Keyword(s):

Cheese Making ◽

Goat’S Milk ◽

Soft Cheese ◽

Goat's Milk

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THE ACIDITY OF GOAT'S MILK IN TERMS OF HYDROGEN ION CONCENTRATION, WITH COMPARISONS TO THAT OF COW'S AND HUMAN MILK

Journal of Biological Chemistry ◽

10.1016/s0021-9258(18)86165-8 ◽

1921 ◽

Vol 46 (1) ◽

pp. 129-132

Author(s):

E.W. Schultz ◽

L.R. Chandler

Keyword(s):

Human Milk ◽

Hydrogen Ion ◽

Ion Concentration ◽

Hydrogen Ion Concentration ◽

Goat’S Milk ◽

Goat's Milk

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Effect of frozen storage on some characteristics of kefir samples made from cow’s and goat’s milk

Food Science and Technology International ◽

10.1177/10820132211003710 ◽

2021 ◽

pp. 108201322110037

Author(s):

Ercan Sarica ◽

Hayri Coşkun

Keyword(s):

Organic Acids ◽

Frozen Storage ◽

Aerobic Bacteria ◽

Ph Values ◽

Flavor Components ◽

Goat’S Milk ◽

Volatile Flavor ◽

Goat's Milk ◽

Lactobacillus Spp ◽

Oxalic Acids

This study was aimed to determine the changes in kefir samples (CK and GK) made from cow’s and goat’s milk during frozen storage. The CK and GK samples were first stored at +4 °C for 14 and 21 days. Thereafter, all the samples were frozen at –35 °C for 24 h and kept at –18 °C for 45 days. There was no significant change in the fat, protein, acidity and pH values in both samples during the storage. The values of viscosity, WI and C* were higher in the CK samples while the syneresis value was higher in the GK samples throughout the frozen storage. The microorganisms ( Lactococcus spp., Lactobacillus spp., Leuconostoc spp., total mesophilic aerobic bacteria and yeasts) found in kefir made from goat's milk were more affected from the frozen storage. In both samples, the changes in organic acids and volatile flavor components were not significant during frozen storage, except acetic, citric and oxalic acids and acetaldehyde in GK sample. In addition, CK samples were preferred sensorially more by the panellists during frozen storage.

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Optimization of Protein Extraction Method for 2DE Proteomics of Goat’s Milk

Molecules ◽

10.3390/molecules25112625 ◽

2020 ◽

Vol 25 (11) ◽

pp. 2625

Author(s):

Muzammeer Mansor ◽

Jameel R. Al-Obaidi ◽

Nurain Nadiah Jaafar ◽

Intan Hakimah Ismail ◽

Atiqah Farah Zakaria ◽

...

Keyword(s):

Extraction Method ◽

Protein Extraction ◽

Chloroform Solution ◽

Milk Proteins ◽

Peptide Mass Fingerprinting ◽

Extraction Methods ◽

Dairy Goats ◽

Goat’S Milk ◽

Peptide Mass ◽

Goat's Milk

Two-dimensional electrophoretic (2DE)-based proteomics remains a powerful tool for allergenomic analysis of goat’s milk but requires effective extraction of proteins to accurately profile the overall causative allergens. However, there are several current issues with goat’s milk allergenomic analysis, and among these are the absence of established standardized extraction method for goat’s milk proteomes and the complexity of goat’s milk matrix that may hamper the efficacy of protein extraction. This study aimed to evaluate the efficacies of three different protein extraction methods, qualitatively and quantitatively, for the 2DE-proteomics, using milk from two commercial dairy goats in Malaysia, Saanen, and Jamnapari. Goat’s milk samples from both breeds were extracted by using three different methods: a milk dilution in urea/thiourea based buffer (Method A), a triphasic separation protocol in methanol/chloroform solution (Method B), and a dilution in sulfite-based buffer (Method C). The efficacies of the extraction methods were assessed further by performing the protein concentration assay and 1D and 2D SDS-PAGE profiling, as well as identifying proteins by MALDI-TOF/TOF MS/MS. The results showed that method A recovered the highest amount of proteins (72.68% for Saanen and 71.25% for Jamnapari) and produced the highest number of protein spots (199 ± 16.1 and 267 ± 10.6 total spots for Saanen and Jamnapari, respectively) with superior gel resolution and minimal streaking. Six milk protein spots from both breeds were identified based on the positive peptide mass fingerprinting matches with ruminant milk proteins from public databases, using the Mascot software. These results attest to the fitness of the optimized protein extraction protocol, method A, for 2DE proteomic and future allergenomic analysis of the goat’s milk.

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