LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Xingyang Guo,He Huang,Xiaoming Jiang,Chao Chang,Pan Gao,Wu Zhong,Chuanrong Hu,Dongping He,Jiaojiao Yin
Coconut oil, a natural oil widely utilized in the food, cosmetics, and pharmaceutical sectors, is significantly influenced by varieties and processing techniques. This study compared cold-pressed and hot-pressed extraction methods for coconut oil from four coconut varieties, evaluating their physicochemical properties, fatty acid composition, and antioxidant capacity. The results revealed that cold-pressed coconut oil exhibited superior control over parameters such as acid value, peroxide value, polycyclic aromatic hydrocarbons (PAHs), and 3-monochloropropane-1,2-diol (3-MCPD) esters, along with enhanced antioxidant capacity. Lauric acid, the predominant fatty acid in coconut oil, ranged from 47.68% to 50.08% in these oils. A significant negative correlation was observed between lauric acid and peroxide value/MCPD/PAHs, while a positive association existed between phenolic compounds and antioxidant capacity. Principal component analysis identified cold-pressed coconut oil from the W4 coconut variety as exhibiting the highest quality, characterized by lower acid value, MCPD and PAHs levels, higher lauric acid content, and potent antioxidant capacity. This study highlights the advantages of cold-pressed coconut oil, particularly from the W4 coconut variety, for superior quality across various parameters, offering valuable insights for the production and processing of coconut oil. These findings contribute to the advancement and application of high-quality coconut oil products in the industry.
研究领域:
食品科学
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化学
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.8
Junqing Qian,Qian Li,Luyan Mo,Xiaohua Zhao,Jun Tong,Changyan Zhao,Hui Guo
Rich in unsaturated fatty acids, walnut oil provides a number of physiological benefits, including a reduction in the risk of cardiovascular disease and a delay in the aging process. In this work, walnut oil was prepared using the aqueous enzyme process and cold pressing method, and it was then analyzed using HPLC and FTIR. The characterization results show that the walnut oil extracted by the aqueous enzyme method outperformed the pressing oil in content of LLL by 11.64%, LLLn by 9.16% and OLL by 4.08%. But this oil had significantly less OLnLn (-) than the pressing oil (7.90%). The Morris water maze and shuttle box tests of ICR mice revealed a notable improvement in the memory of the animals administered walnut oil. Among them, mice fed the walnut oil extracted by aqueous enzyme method showed a much shorter escape latency and a significantly higher rate of active avoidance reaction ( p < 0.05, p < 0.01) than mice fed cold pressing method. With the prolongation of time, the mice even performed better than the positive control PIR group in all aspects. In summary, the quality of walnut oil extracted by aqueous enzyme method is better than that by cold pressing method. Practical Applications : Walnut oil prepared by aqueous enzymatic extraction can improve learning ability, is healthy and pollution-free, and can be utilized as a dietary supplement in ordinary life.
研究领域:
营养学
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生物化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 47
·24740-24748
·
IF 8.867
Jie Gao,Lei Miao,Chengyan Liu,Xiaoyang Wang,Ying Peng,Xingyu Wei,Jianhua Zhou,Yu Chen,Ryo Hashimoto,Toru Asaka,Kunihito Koumoto
Being light, cheap, breathable and foldable, paper is emerging as a new type of substrate for flexible thermoelectric films. Several techniques including soaking and magnetron sputtering have been developed to coat inorganic semiconductors onto paper substrate, but the flexibility and thermoelectric performance of the resulting films are still far from satisfactory. This work implements a novel glass-fiber-aided cold-press method for achieving flexible n-type Ag2Te nanowire (NW) films on copy-paper substrate. A greatly enhanced electrical conductivity has been realized in Ag2Te NWs film due to the disappearance of grain boundaries under compression to 30 MPa. As a consequence, the largest power factor (PF) value of up to 192 μW (mK2)−1 at 195 °C surpasses the performance of paper based thermoelectric films reported previously. Moreover, the PF value only decreases by 20% after 500 bending cycles, suggesting the good flexibility of the copy-paper supported Ag2Te NWs films. A thermoelectric module containing 10 pieces of series-connected Ag2Te films is fabricated using this glass-fiber-aided cold-press method. With ΔT increasing from 20 K to 80 K, the open-circuit voltage of module continually increases from about 11 mV to 60 mV. This measurement of open-circuit voltage has been repeated 10 times to confirm the stability of paper-supported Ag2Te thermoelectric module. The glass-fiber-aided cold-press method in this study provides an effective access to high-performance, flexible and solvent-processable inorganic thermoelectric films on copy-paper substrate.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Foods
·
2024
·Vol. 13
·期 13
·2064
·
IF 4.7
Pengbo Wang,Zhixin Wang,Manqi Zhang,Xianghui Yan,Jiaheng Xia,Junxin Zhao,Yujing Yang,Xiansi Gao,Qifang Wu,Deming Gong,Ping Yu,Zheling Zeng
Cinnamomumcamphoraseed kernels (CCSKs) are rich in phytochemicals, especially plant extracts. Phytochemicals play a vital role in therapy due to their strong antioxidant and anti-inflammatory activities. Extracts from CCSK can be obtained through multiple steps, including pretreatment, extraction and purification, and the purpose of pretreatment is to separate the oil from other substances in CCSKs. However,C. camphora seed kernel extracts (CKEs) were usually considered as by-products and discarded, and their potential bioactive values were underestimated. Additionally, little has been known about the effect of pretreatment on CKE. This study aimed to investigate the effects of pretreatment methods (including the solvent extraction method, cold pressing method, aqueous extraction method and sub-critical fluid extraction method) on the extraction yields, phytochemical profiles, volatile compounds and antioxidant capacities of different CKE samples. The results showed that the CKE samples were rich in phenolic compounds (15.28–20.29%) and alkaloids (24.44–27.41%). The extraction yield, bioactive substances content and in vitro antioxidant capacity of CKE pretreated by the sub-critical fluid extraction method (CKE-SCFE) were better than CKEs obtained by other methods. CKE pretreated by the solvent extraction method (CKE-SE) showed the best lipid emulsion protective capacity. Moreover, the volatile substances composition of the CKE samples was greatly influenced by the pretreatment method. The results provided a fundamental basis for evaluating the quality and nutritional value of CKE and increasing the economic value of by-products derived from CCSK.
研究领域:
食品科学
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药理学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）