论文铁皮石斛纳米粉和超微粉物理特性和体外抗氧化活性比较是关于对不知道怎么写铁皮石斛论文范文课题研究的大学硕士、相关本科毕业论文铁皮石斛专卖论文开题报告范文和文献综述及职称论文的作为参考文献资料下载。
摘 要 通过羟基自由基（·OH）、超氧阴离子（O2·- ）、亚硝酸根离子（NO2-）及DPPH自由基4种体外抗氧化模型,对铁皮石斛纳米粉和超微粉的体外抗氧化作用进行比较研究,对2种粉末的流动性、松密度、溶解性等物理特性,粒度及电镜扫描结构进行分析比较,并测定其悬浮液中多糖溶出速度及含量.结果表明：铁皮石斛纳米粉的多糖溶出速度及含量要高于超微粉；铁皮石斛纳米粉和超微粉水提取液对·OH、O2·- 、NO2-、DPPH自由基均具有较强的清除能力,且在一定范围内,清除率随浓度的增加而增大,呈现良好的量效关系；同一浓度时,纳米粉的清除率要明显高于超微粉,说明纳米粉具有更强的体外抗氧化能力；纳米粉的松密度、持水力、膨胀力、溶解性及水悬浮体系稳定性要高于超微粉,但流动性、润湿时间等参数不如超微粉；粒度及电镜分析表明纳米粉的细胞破碎程度更大,粒度更小,形状更不规则.
关键词 铁皮石斛；纳米粉碎；超微粉碎；抗氧化性；物理特性
中图分类号 TS255.36 文献标识码 A
Physical Characteristics and Antioxidant Activity in vitro of Dendrobium candidum Nanometer Powder and Submicron Powder
ZHANG Ezhen1,2, HUANG Meihua1, XIN Ming1, HE Quanguang1,
HUANG Zhenyong1, QIN Renyuan1, HUANG Maokang1
1 Institute of Agro-Food Science & Technology, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China
2 Guangxi Crop Genetic Improvement Laboratory, Nanning, Guangxi 530007, China
Abstract The antioxidant effect of Dendrobium candidum nanometer powder and submicron powder was investigated and compared by hydroxyl radical（·OH）, superoxide anion radical（O2·- ）, nitrite ion（NO2-） and DPPH antioxidant experiments in vitro, the physical properties such as flowability, bulk density, solubility of the two kinds of powder were studied, and the particle size and scanning electron microscopy of the powder were analyzed, the polysaccharide dissolution rate and content in the suspension were also measured. The results showed that the polysaccharide dissolution rate and content of nanometer powder were higher than that of submicron powder； Both of D. candidum nanometer powder and submicron powder had strong scavenging activity of ·OH, O2·- , （NO2-）and DPPH, and within a certain range, the clearance rate of D. candidum powder increased with the increase of concentration, had obvious dose-effect relationship； In addition, the clearance rate of nanometer powder was significantly higher than that of submicron powder at the same concentration, the former had stronger antioxidant capacity in vitro； The bulk density, water-holding ability, expansibility, solubility and water suspension stability of nanometer powder were better than that of submicron powder, but the flowability and wettability were not as good as submicron powder； D. candidum nanometer powder had greater degree of cell disruption, smaller particle size and more irregular shape than submicron powder.
Key words Dendrobium candidum；Anometer crushing；Superfine grinding；Antioxidant activity；Physical characteristics
总结:本文关于铁皮石斛论文范文,可以做为相关论文参考文献,与写作提纲思路参考。
参考文献：
1、 超微粉型油菜种衣剂筛选理化性能 摘 要：为了筛选超微粉型油菜种衣剂的合适配方，探明其理化性质，为新型油菜种衣剂的创制与应用提供参考，用3个自研超微粉型油菜种衣剂包衣油菜种子，通。
2、 铁皮石斛大棚高产优质栽培技术 文章从铁皮石斛栽培环境要求、栽培前准备工作、栽培方式、栽培后管理、病虫害防治及采收和采收后处理等方面，介绍铁皮石斛大棚人工栽培技术。铁皮石斛D。
3、 乐清市铁皮石斛附生栽培技术 摘要 总结了乐清市铁皮石斛附生栽培技术，包括栽培环境选择、树种选择、种苗选择、栽培方法、日常养护、采收、加工等方面内容，以供种植者参考。关键词。
4、 不同浓度NAA对紫皮石斛试管苗生根影响 摘要 本试验以紫皮石斛试管苗为试验材料，通过在1 2MS培养基中添加不同浓度的NAA，探索促进紫皮石斛试管苗生根的适宜NAA浓度。结果表明，在1。
5、 4种食品防腐剂在铁皮石斛开放式组织培养中抑菌效果 摘 要 就4种食品防腐剂对铁皮石斛幼苗和原球茎在开放式组织培养中的抑菌效果进行试验。结果表明：尼泊金复合酯和肉桂酸钾具有较好的抑菌效果，0 12。
6、 不同因素对铁皮石斛常规栽培影响试验探究 摘要：铁皮石斛在常规栽培中有许多影响因素会抑制其生长，本试验通过对基质、湿度、肥料、光照等影响因素的不同处理，探究铁皮石斛常规栽培最佳的生长环境。