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以百香果籽油清除羟基自由基能力和对超氧阴离子自由基的清除能力为指标,研究了百香果籽油的抗氧化活性。同时进一步采用Schaal烘箱法处理油样,在时间变化下,以过氧化值为指标,研究百香果籽油对花生油脂的抗氧化作用。实验结果表明,百香果籽油具有很好的清除超氧阴离子自由基的作用,抑制率维持在66%~95%之间;有较好的清除羟自由基作用,清除率能达到81.7%;对花生油脂有较好的抗氧化作用,抗氧化因子PF为1.67。百香果籽油具有较好的抗氧化能力。 相似文献
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漆籽综合利用不可低估 总被引:1,自引:0,他引:1
<正> 漆籽通常被认为是漆树的副产品。其实副产品不副,随着科学技术的日益发展,其经济价值和使用价值皆不在生漆之下。漆蜡是由漆籽榨取的油脂,碘位低,熔点高,是生产肥皂、甘油和硬脂酸的上乘原料,其棕榈酸的含量在70%以上,位居目前常用油脂的首位,在轻工、化工、纺织、机 相似文献
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为了探讨铁皮石斛提取物在化妆品中的应用,通过清除ABTS自由基试验、酪氨酸酶活性抑制试验、封闭性斑贴测试、临床功效测试,验证铁皮石斛提取物的效果。结果显示,铁皮石斛提取物对ABTS自由基有较好的清除效果,半数清除浓度值(IC50)为(6.84±0.94)mg/mL。对酪氨酸酶具有较好的抑制作用,IC50为(8.57±0.81) mg/mL。根据封闭性斑贴测试,显示含质量分数10%铁皮石斛提取物的精华液无刺激性。32名受试者使用6周后结果表明,与使用前相比皮肤含水量增长15.34%、经皮失水减少17.84%、皮肤黄度减少5.46%、透亮度增加5.67%,均有显著改善(P<0.01)。因此,铁皮石斛提取物具有较强抗氧化和抑制酪氨酸酶功效,温和安全,长期使用含质量分数10%铁皮石斛提取物的精华液能达到保湿、保护皮肤屏障、祛黄、美白功效,值得临床推广和使用。 相似文献
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一、前言1947年Rohm and Hass公司首先把环氧增塑剂用于聚氯乙烯塑料,五十年代初期,发现它们与以钡、镉、锌的脂肪酸盐类为基础的稳定剂起协同作用,从此环氧增塑剂在塑料工业中的应用日益增加了。最常用的环氧增塑剂是环氧植物油。我国天然植物油脂的资源十分丰富,其中橡胶籽油就是资源较多的一种,橡胶籽含量大约是22~26%,是热带木本植物油料。橡胶籽 相似文献
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K. K. Singh D. P. Wiesenborn K. Tostenson N. Kangas 《Journal of the American Oil Chemists' Society》2002,79(2):165-170
The cooking and drying conditions for oilseeds preparatory to screw pressing are some of the most important factors that influence
screw-press performance. Screw-press oil recovery, residual oil, pressing rate, and oil sediment content were measured for
uncooked crambe seed and crambe seed cooked at 100°C for 10 min, pressed at six moisture contents ranging from 9.2 to 3.6%
dry basis. Oil recovery significantly increased (P≤0.01) from 69 to 80.9% and 67.7 to 78.9% for cooked and uncooked seeds, respectively, as moisture content decreased. Residual
oil significantly decreased (P≤0.01) from 16.3 to 11.1% and 16.9 to 11.9%, respectively, as moisture content decreased. The reduced oil loss due to only
drying the seed from 9.2 to 3.6% was 32% for cooked seed, whereas cooking contributed only 3.6 to 7% reduced oil loss. Pressing
rate decreased from 5.81 to 5.17 kg/h and 6.09 to 5.19 kg/h for cooked and uncooked seeds, respectively, whereas sediment
content increased from 0.9 to 7.8% and 1.1 to 5.4%, respectively, as moisture content decreased. The effects of moisture content
on pressing rate and sediment content were significant at P≤0.05. All relationships of screw-press performance to moisture content were fitted to a second-order polynomial. 相似文献
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Anussara Setsiripakdee Nattaya Lourith Mayuree Kanlayavattanakul 《Journal of surfactants and detergents》2019,22(6):1461-1467
Pumpkin seed oil is well known for its health benefits due to its high content of fatty acid constituents and tocopherols. The removal efficacy of pumpkin seed oil was assessed using UV–Vis spectroscopy. The oil was able to remove 79.92 ± 0.07%, 41.02 ± 0.25%, and 23.54 ± 0.19% of foundation and liquid and pen eyeliners. A stable makeup remover was formulated using 5–15% pumpkin seed oil. Addition of pumpkin seed oil significantly (P < 0.001) enhanced removal ability of the base remover. The remover containing 5% pumpkin seed oil was able to remove 89.27 ± 0.02%, 67.72 ± 0.08%, and 41.25 ± 0.07% of foundation, liquid, and pen eyeliners, respectively, while those of the remover containing 10% pumpkin seed oil were 78.24 ± 0.02%, 66.88 ± 0.05%, and 38.43 ± 0.05%, and those of the remover containing 15% pumpkin seed oil were 84.41 ± 0.01%, 69.79 ± 0.12%, and 41.88 ± 0.04%, respectively. On the other hand, removal efficiencies of the benchmark were 91.20 ± 0.03%, 73.46 ± 0.10%, and 54.00 ± 0.07%, respectively. The removers containing pumpkin seed oil did not cause skin irritation as monitored by a single closed-patch test in 10 female volunteers. The remover containing 5% pumpkin seed oil was further preference studied in 25 female volunteers in a comparison with the benchmark. The pumpkin seed oil remover gained a better overall preference over the benchmark (82.29 ± 4.17% and 80.20 ± 8.64%; P = 0.287). Of which, skin hydration of the developed bio-oil remover was significantly (P < 0.001) satisfied. 相似文献
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Nazgol Karimi Reza Esmaeilzadeh Kenari 《Journal of the American Oil Chemists' Society》2016,93(2):243-250
We investigate the efficiency of using a coating made from novel hydrocolloid basil seed gum (BSG), salep, and a mixed solution of BSG and salep as well as oil origin (canola or palm olein) to reduce oil absorption in deep‐fried potato strips. We also evaluate the coating pick up, its effect on moisture content, frying yield value of fried potatoes and flow behavior of the coating suspensions. Flow curves show that all the studied suspensions are pseudoplastic and have shear thinning characteristics. The most effective coating formulations were 0.5 % BSG and 1.5 % salep. For these formulations, maximum oil uptake reduction was 28.8 and 28.7 % for potato strips compared to uncoated samples; the increase in moisture content was 29.1 and 17.5 %, respectively. Furthermore, the increase in moisture content resulted in an increase in frying yield up to 16.62 % for 0.5 % BSG. The oil type significantly (p < 0.05) influenced oil uptake. 相似文献
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Qasim Ali Farooq Anwar Muhammad Ashraf Nazamid Saari Rashida Perveen 《International journal of molecular sciences》2013,14(1):818-835
This study was carried out to appraise whether or not the exogenous application of a potential osmoprotectant, proline, could ameliorate the adverse effects of drought stress on maize seed and seed oil composition, as well as oil antioxidant activity. Water stress reduced the kernel sugar, oil, protein and moisture contents and most of the seed macro- and micro-elements analyzed in both maize cultivars but it increased the contents of seed fiber and ash. Water stress increased the oil oleic acid content with a subsequent decrease in the amount of linoleic acid, resulting in an increased oil oleic/linoleic ratio for both maize cultivars. However, no variation was observed in oil stearic and palmitic acids content due to water stress. A considerable drought induced an increase in seed oil α-, γ-, δ- and total tocopherols and flavonoids were observed in both maize cultivars. However, oil phenolic and carotenoid content as well as 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity decreased. Foliar-applied proline significantly increased the content of seed sugar, oil, protein, moisture, fiber and ash in both maize cultivars under well irrigated and water deficit conditions. Furthermore, exogenous application of proline increased the oil oleic and linoleic acid contents. The concentrations of antioxidant compounds namely phenolics, carotenoids, flavonoids and tocopherols estimated in the seed oil increased due to foliar-applied proline under water deficit conditions that was positively correlated with the enhanced oil DPPH free radical scavenging activity. Moreover, the increase in the contents of these antioxidant compounds and oil antioxidant activity due to the foliar application of proline was noted to be more pronounced under water deficit conditions. 相似文献
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Various components of Phoenix tree (Firmiana simplex) seed were determined. Oil, protein, moisture, ash, and fiber accounted for 27.8 ± 0.3, 19.7 ± 0.4, 7.5 ± 0.2, 4.4 ± 0.3, and 31.23 ± 0.93 % (w/w) of the seed, respectively. The acid value, peroxide value, saponification value, and unsaponifiable matter content of Phoenix tree seed oil extracted using the Soxhlet method were 3.73 ± 0.02 mg KOH/g, 1.97 ± 0.21 mmol/kg, 183.74 ± 2.37 mg KOH/g, and 0.90 ± 0.05 g/100 g, respectively. The total tocopherol content was 54.5 ± 0.5 mg/100 g oil, which consisted mainly of δ‐tocopherol (29.5 ± 0.6 mg/100 g oil) and γ‐tocopherol (13.8 ± 0.8 mg/100 g oil). Linoleic acid (L, 30.2 %), oleic acid (O, 22.2 %), and sterculic acid (S, 23.2 %) were the main unsaturated fatty acids of Phoenix tree seed oil. The saturated fatty acids included palmitic acid (17.4 %) and stearic acid (St, 2.9 %). The work shows the first report of sterculic acid in seeds of this species. This oil can be used as a raw material to produce sterculic acid. 相似文献