macedonia low temperature walnut oil mill in kazakhstan

                                               
                                               
                                               
                                               
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  • What is the distribution of oil in a walnut kernel?
  • Oilseed distribution was found throughout the cytoplasmic network, primarily stored in oil bodies that were separated by a phospholipid monolayer and basic proteins, predominantly as triglycerides (Deng et al., 2018). The microcellular structure of walnut kernels subjected to different pretreatments is shown in Fig. 2.‌
  • Does heat pretreatment affect absorption peak intensities of walnut kernels?
  • The absorption peak intensities of heat-treated walnut kernels were lower than those of untreated samples, which may be related to a decrease in the polysaccharide (carbonyl) content of the samples after heat pretreatment. Similar results were also obtained for the FTIR analysis of peony seeds (Wang et al., 2021).‌
  • Does heat pretreatment damage the cell structure of walnut kernels?
  • In the untreated sample, the cell wall was clear and intact. The oil bodies were distributed as small spheres within the cytoplasmic network. However, the cell structure of walnut kernels was deformed and damaged to some extent after they underwent different heat pretreatments.‌
  • Is microwaving a good pretreatment method for walnut oil?
  • We found that microwave pretreatment had the highest comprehensive score of 2.58, followed by stir-frying pretreatment, with a score of 0.45, while the untreated sample had the lowest comprehensive score of −3.21 (Table 4). Thus, microwaving is a green and efficient pretreatment method for producing walnut oil with a strong flavor. 4. Conclusion‌
  • What is cold pressed walnut oil?
  • Cold-pressed walnut oil has a delicate fragrance and retains high levels of nutritional components. However, as the internal structure of the walnut kernel is relatively intact during oil extraction, the release of oils and fats is reduced significantly, which can result in a lower yield of oil (Cai et al., 2021).‌
  • Does heat pretreatment affect the flavor of walnut oil?
  • Many researchers have investigated the flavor of heat-treated walnuts and the oil extracted from them; however, a comprehensive literature report on the systematic investigation of the effects of different heat pretreatment methods on the quality, oxidative stability, and volatile compounds in walnut oil is lacking.