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椰子花序汁液的采集耗时长,易腐败变质。文中研究了椰子花序汁液采集过程中的保鲜方法。采集前对采集环境进行清洁,使用食品蒸煮袋代替竹筒收集椰花汁可提高椰花汁的新鲜度,同时在收集前根据预计流量往采集容器中加入一定量的焦亚硫酸钠和柠檬酸,使椰子花序汁液中二氧化硫的浓度约为80mg/kg,柠檬酸浓度约为0.08g/100mL。采集9h后椰子花序汁液的酸度为0.09g/100mL(以乳酸计),比空白对照组降低了0.13g/100mL,所得椰子花序汁液室温放置24h后酸度缓慢增加至0.23g/100mL,比对照组降低了0.60g/100mL,并在36h才发酵产气,比对照组延迟了27h。 相似文献
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通过薄膜-超声分散法制备羧甲基壳聚糖包裹的椰子油脂质体,以大豆卵磷脂和氢化大豆卵磷脂为膜材,包封率为主要评价指标,采用单因素和正交实验对薄膜-超声分散法制备羧甲基壳聚糖包裹的椰子油脂质体的工艺和配方进行优化,并对所制备脂质体的微观形态、包封率、丙二醛(malondialdehyde,MDA)含量和体外释放度进行分析。结果表明:最佳制备条件为羧甲基壳聚糖与磷脂比为1:16,磷脂与胆固醇比为8:1,椰子油与磷脂比为3:1,pH为4.5,超声强度750 W,超声时间20 min,此条件下实际包封率为96.94%±0.20%。羧甲基壳聚糖包裹椰子油脂质体在0.9%氯化钠中,24 h的释放度为41.28%±0.30%。椰子油脂质体的包封率高和累积释放度高,稳定性好,可实现延缓释放和靶向给药。 相似文献
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《Ceramics International》2020,46(6):7268-7278
The present study evaluated the effect of fucoidan/alginate-polyethylene glycol-gellan gum (Fu/AL-PEG@GGH) hydrogel using low-level laser therapy (LLLT) on facilitating wound healing for wound care management. The hydrogel was fabricated and characterized to evaluate the wound healing potential. Cytotoxicity and apoptotic effects were evaluated with L929 and NIH3T3 cells. Uniform spherical sheets were observed with high thermal stability caused by porous matrixes with the increased cell viability and fast cell migration. Scar tissue was reduced by larger wound contraction with faster healing effects from the hydrogel + LLLT-treated group at day 14. The polysaccharides may promote wound healing due to the strong bonds by the physical cross-linking in hydrogel preparation. The results from hydrogel + LLLT-treated group confirmed an effective wound healing potential from the presence of high fibroblast and collagen deposition. Therefore, the combined practice of the hydrogel with LLLT may enhance a wound healing process for effective wound care applications. 相似文献
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Vacuum-puffing has been found to be a very useful process for production of non-deep-fried Yukwa as it ideally produced highly porous and soft texture. In this study, we compared the effects of different green tea powder (GTP) concentrations of 0, 2, 5 and 10 g/100 g on the qualities of vacuum-puffed Yukwa and deep-fried Yukwa. The fat contents of deep-fried Yukwa were significantly higher than vacuum-puffed Yukwa at the same GTP concentrations. Yukwa bases of 10 g/100 g GTP level contained higher total catechins and caffeine contents for vacuum-puffed Yukwa than deep-fried Yukwa. Vacuum-puffed Yukwa had more total phenolics and flavonoids, and a better scavenging effect on DPPH and reducing power than deep-fried Yukwa at the same green tea concentrations. Vacuum-puffing produced more breakable expanded pellets than deep-frying. The sensory evaluation of Yukwa base showed deep-fried Yukwa added with 2 g/100 g GTP was preferred for all the examined properties. 相似文献
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采用水提醇沉法制备了椰子吸器多糖,并初步分析了其单糖组成、分子量大小与分布、红外光谱等结构特征和抗氧化、降糖酶抑制等体外生物学活性。结果表明:吸器多糖是一种酸性杂多糖,中性糖和糖醛酸含量分别为42.33%和21.34%,可能含有吡喃环结构,主要由岩藻糖、鼠李糖、阿拉伯糖、半乳糖、葡萄糖、木糖和半乳糖醛酸7种单糖组成,摩尔比为1.00:4.40:21.27:21.07:51.76:7.06:4.33。分子量分析表明吸器多糖由3个组分构成,其中峰3为主成分,分子质量为1.53×104 g/moL。吸器多糖在6 mg/mL对DPPH和羟自由基的清除率分别为82.49%和85.83%,100 mg/mL时对α-葡萄糖苷酶抑制率达69.91%。研究结果可为椰子吸器在功能性食品或医药等领域的加工利用提供数据支撑。 相似文献
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椰子种皮油的提取与脂肪酸组成分析 总被引:1,自引:0,他引:1
以椰子种皮为试验材料,对种皮油的提取工艺进行了优化。并对所得种皮油的理化性质和脂肪酸组成进行了分析。结果表明:椰子种皮油的最佳提取工艺为温度60℃,料液比1∶4(g/m L),时间3 h,出油率可达76.83%。所得种皮油具有一定的椰香味,为非干性油(碘值14.69 g/100 g),酸值为13.37 mg/g。月桂酸(42.28%)为其脂肪酸的主要成分,中短链脂肪酸(C8~C12)含量为51.45%,饱和脂肪酸含量达84.49%,是一种值得开发的天然饱和油脂和新型脂肪能源。 相似文献