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胡方华 《安徽工业大学学报》1988,(4)
对于鳞片状铝粉粒,可以先用实验方法测出粒子在煤油中沉降速度U(mm/min)与直径的关系为U~(1/2)=0.860+0.0302d;再测出粒子直径与厚度σ(μm)的关系为d~(1/2)=1.74+8.76δ。据此,用沉降法或显微镜法得出相近似的粒度分布曲线,两曲线有几乎相同的最可几半径rm。 相似文献
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Kai Xu Zhenxing Wang Feng Wang Yun Huang Fengmei Wang Lei Yin Chao Jiang Jun He 《Advanced materials (Deerfield Beach, Fla.)》2015,27(47):7881-7887
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Sana Noreen Tabussam Tufail Huma Bader Ul Ain Anwar Ali Rana Muhammad Aadil Arash Nemat Muhammad Faisal Manzoor 《Food Science & Nutrition》2023,11(3):1309-1317
Natural herbs are now receiving more attention due to the growing demand for their antioxidant properties. This study compared flaxseed and fennel seeds for their nutritional composition, bioactive moieties, and antioxidant activity—the study comprised two different phases. According to methods, phase I analyzed flaxseed and fennel seeds for proximate composition, mineral profile, dietary fiber, and amino acid content. In phase II, seeds were extracted using three different solvents, i.e., ethanol 80%, acetone 80%, and distilled water, to probe the total phenolic and flavonoid content. Antioxidant activity was measured using DPPH and a FRAP in the final phase. Current study revealed that flaxseed had higher protein (17.33 ± 0.02%), fat content (36.76 ± 0.02%), potassium (763.66 ± 4.04 mg/100 g), iron (5.13 ± 0.03 mg/100 g), phosphorus (581.46 ± 4.07 mg/100 g), magnesium (406.60 ± 5.12 mg/100 g), and zinc (3.30 ± 0.49 mg/100 g), respectively. In fennel seed, high dietary fiber (53.2 ± 0.01 g/100 mg), calcium, manganese, and sodium (588.93 ± 7.77, 20.30 ± 0.95, and 57.34 ± 0.33 mg/100 g, respectively) were found. Acetone showed better extraction efficiency than acetone, ethanol, and distilled water. Moreover, acetone flaxseed extract showed higher total phenolic content (84.13 ± 7.73 mgGAE/g), flavonoid content (5.11 ± 1.50 mgQE/g), and FRAP (5031 ± 15.92 μMFe2+/g) than fennel seed extract. This study showed that, among both herbs, flaxseed extract may have pharmacological potential in preventing illnesses and may be suggested for use in the food industry as a natural antioxidant. 相似文献
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Mohamed Hasanin Amal H. Abdel Kader Essam S. Abd El-Sayed Samir Kamel 《Starch - St?rke》2023,75(5-6):2200132
The possibility of manufacturing edible packaging materials with tailored properties and low cost has attracted much interest. This work presents a new material for edible packaging made from flaxseed gum (FSG) and chitosan (Ch) loaded with zinc oxide nanoparticles (ZnO-NPs). ZnO-NPs are synthesized in situ during the preparation of the edible film. The Ch/FSG/ZnO-NPs films are prepared by casting Ch in different ratios of FSG (12.5%, 25%, 37.5%, and 50%). The resulting films are evaluated for their physicochemical, mechanical, and barrier properties to determine their suitability for coating or packaging food or bioproducts. By studying the antimicrobial activities of the ZnO-NPs loaded films, we can see that ZnO-NP's concentration highly affects these activities. In addition, the FSG improves mechanical properties. Films developed by incorporating ZnO-NPs are proposed to be appropriate for low-moisture food and pharmaceutical products, which can reduce environmental problems associated with synthetic packaging. Consequently, Ch/FSG composite films have the potential to replace conventional packaging. 相似文献
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本文旨在探究柠檬马鞭草精油结合亚麻籽胶对冰温贮藏大菱鲆肌原纤维蛋白(myofibril protein,MP)生化特性及构象的影响.以未涂膜处理组为对照,实验组用添加质量浓度为0％、0.128％、0.64％和1.28％柠檬马鞭草精油的复合涂膜处理,分析冰温贮藏期间大菱鲆MP结构及生化特性的变化.结果 表明:随着贮藏时间... 相似文献
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