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银狐皮毛被及皮板组织构造的研究 总被引:1,自引:0,他引:1
用光学显微镜和扫描电镜观察了国产人工饲养银狐的毛被和皮板组织构造 ,测定了毛的长度、细度、密度、毛的鳞片高度和皮板厚度。提供了毛和皮板组织学图片 15幅。 相似文献
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以发酵得到的中国被毛孢菌丝体为原料进行热水浸提,经过醇沉、脱蛋白、脱色素以及DEAE-Sepharose Fast Flow离子交换柱色谱和Sephacryl S-100凝胶柱色谱得到均一性多糖组分(HSIPS2),并对该组分进行链构象及抗氧化活性分析。结果表明:HSIPS2的单糖组成及摩尔比例为葡萄糖∶半乳糖∶甘露糖∶核糖=48.52∶6.58∶5.17∶1.0,其绝对分子量为1.46×10~4 g/mol,纯度为99.82%;该多糖在0.1 mol/L的Na NO3溶液中呈柔顺链构象,流体力学半径R_h=2.3 nm,M_L=334.05 nm~(-1),q=0.70 nm,d=0.69 nm;同时,HSIPS2清除羟自由基的IC_(50)为0.749 mg/m L,氧自由基吸收能力(ORAC值)为872.80μmol TE/g,说明HSIPS2具有较高的抗氧化能力。 相似文献
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以发酵得到的中国被毛孢菌丝体为原料进行热水浸提,经过醇沉、脱蛋白、脱色素以及DEAE-Sepharose Fast Flow离子交换柱色谱和Sephacryl S-100凝胶柱色谱得到均一性多糖组分(HSIPS2),并对该组分进行链构象及抗氧化活性分析。结果表明:HSIPS2的单糖组成及摩尔比例为葡萄糖∶半乳糖∶甘露糖∶核糖=48.52∶6.58∶5.17∶1.0,其绝对分子量为1.46×104 g/mol,纯度为99.82%;该多糖在0.1 mol/L的Na NO3溶液中呈柔顺链构象,流体力学半径Rh=2.3 nm,ML=334.05 nm-1,q=0.70 nm,d=0.69 nm;同时,HSIPS2清除羟自由基的IC50为0.749 mg/m L,氧自由基吸收能力(ORAC值)为872.80μmol TE/g,说明HSIPS2具有较高的抗氧化能力。 相似文献
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目的 分析中国被毛孢(Hirsutella sinensis)8#菌株降解黄曲霉毒素B1 (AFB1)的能力。方法 考察该菌株培养液、菌丝体悬液和上清液去除AFB1的能力;利用洗脱和萃取法区分生物降解和可逆吸附AFB1;研究不同初始AFB1浓度、温度、pH和金属离子对其降解能力的影响;对AFB1降解液进行高效液相色谱和薄层色谱分析。结果 H.sinensis培养液和菌体降解效果显著(P<0.05),96 h后对初始浓度100 ng/mL的AFB1降解率分别是96.90%±4.39% 和 97.93%±2.92%。磷酸盐缓冲液洗脱液和甲醇萃取液均未检测到AFB1,证实了该菌生物降解AFB1。菌株AFB1降解效果与初始浓度密切相关。当反应温度25 ℃,pH 7.0时,培养液作用72 h后降解率为99.90%±0.18%。同时,反应液中加入Fe2+有利于降解,而Mg2+却起到了抑制作用。高效液相色谱和薄层层析对产物分析表明,该菌株可将AFB1降解为至少为1种产物。结论 中国被毛孢8#菌株对AFB1有良好的降解作用,可用于生物降解真菌毒素的潜力菌株。 相似文献
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为考察抗菌织物的耐洗性及皮肤刺激性,以经纳米银整理的抗菌丝织物为实验对象,采用琼脂平皿扩散法和吸收法对其抗菌性能进行定性和定量实验,采用电感耦合等离子体质谱仪(ICP-MS)测定样品的金属溶出量,同时利用EPI-MODEL人体皮肤模型,对织物水萃取液的皮肤刺激性进行初步研究。结果显示:在洗涤50次后,样品对大肠杆菌8099和金黄色葡萄球菌ATCC6538的抗菌率依然在99%以上,具有良好的耐洗性能;织物水萃取液对皮肤无刺激性,较为安全。 相似文献
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为了探究白鲢鱼皮是水产明胶的良好来源,得到低脂肪含量的白鲢鱼皮明胶,本实验研究了白鲢鱼皮的基本成分,白鲢鱼皮明胶的脱脂方法,并对其脱脂前后的理化特性进行对比。通过国标等方法对白鲢鱼皮进行基本成分分析,采用热水提取法制备白鲢鱼皮明胶并添加四种不同型号大孔树脂(D101、X-5、XAD1180、AB-8)以静态吸附的方式对明胶溶液进行脱脂处理。结果表明:白鲢鱼皮富含蛋白质、矿物质元素等,可作为水产明胶的良好来源;经D101型树脂在40℃、树脂添加量为10%的条件下处理的明胶溶液,脱脂效果最佳,脱脂率达到78.94%±2.98%;羟脯氨酸含量由6.77%±0.09%上升到7.17%±0.13%;脱脂前后明胶的紫外光谱均在221 nm处出现最大吸收峰;SDS-PAGE电泳图谱均主要由β,α1,α2三条肽链组成;红外光谱图的趋势基本相同,均具有胶原的典型官能团;脱脂后明胶的凝胶强度较脱脂前略有降低;脱脂后的明胶粘度较脱脂前有所增大;脱脂后的明胶中Ca、Mg、Zn含量较脱脂前分别增加了75.96%、284.13%和2.68%,但Cu、Fe、Mn含量较脱脂前分别降低了16.67%、48.11%和15.56%。 相似文献
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Sumei Hu Yongkang Luo Jianyun Cui Wei Lu Hang Wang Juan You Huixing Shen 《International Journal of Food Science & Technology》2013,48(1):187-194
Silver carp (Hypophthalmichthys molitrix) skin and muscle were hydrolysed, respectively, and then used as part of an edible coating to preserve fish. The effects of muscle and skin hydrolysates as edible coatings for shelf life extension of common carp (Cyprinus carpio) were evaluated over 18 days at 4 °C, by comparing these two treatments, a chitosan coating with muscle hydrolysate, chitosan alone, and an untreated control. All coatings were made up with 5% glycerol. The quality of the carp was assessed by using total volatile basic nitrogen (TVB‐N), total viable counts (TVC), thiobarbituric acid (TBA) and K value. Compared with the control group, the rate of increase in TVB‐N, TVC, TBA and K value of carp coated with fish skin hydrolysates, fish muscle hydrolysates and chitosan added to fish muscle hydrolysates were lower. According to the total viable counts, the storage life of fish with fish skin hydrolysates coatings and chitosan added fish muscle hydrolysates coatings were 16 days, 2 days longer than those with the chitosan coatings and twice as long as the control group. 相似文献
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目的 研究鲢鱼骨中鱼油的提取最佳工艺。方法 对比高温蒸煮、热风干燥、冷冻干燥不同处理方式, 将鲢鱼骨粉碎后, 以提取率为指标, 分别研究索氏提取、稀碱水解、酶法水解三种鱼油的提取方式, 并对稀碱水解法进行正交实验方案设计。结果 综合考虑, 采用稀碱水解法提取具有较高的应用价值。稀碱水解法的最优条件为温度85 ℃、pH10.0、料液比1:2、时间40 min, 鲢鱼骨油提取率为39.83%。结论 采用热风干燥法对鱼骨进行前处理, 稀碱水解法提取鲢鱼骨中脂肪提取率最高。 相似文献
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R. L. McMullen E. Bauza C. Gondran G. Oberto N. Domloge C. Dal Farra D. J. Moore 《International journal of cosmetic science》2010,32(2):143-154
Image processing steps and analysis techniques were developed for the quantification of photomicrographs obtained from light and fluorescence microscopy. The substrates examined were either skin cell cultures, such as normal human keratinocytes (NHK) or fibroblasts, or ex vivo skin sections. Examples of the analyses are provided for the comparison of skincare active ingredient treated samples vs. placebo to demonstrate the utility of the methods to quantify and provide numerical data for a procedure that is typically qualitative in nature and based on observations by a histologist. Quantifiable experiments that are discussed include: Fontana Masson staining for melanin expression; Nile red staining to detect cellular lipid droplets; nuclei staining with diamidino‐phenylindole (DAPI); and immunofluorescent staining of protein expression with a primary antibody directed against the protein (antigen) and a secondary antibody tagged with a fluorescent dye (Alexa Fluor 488) against the primary antibody. 相似文献