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为研究吡啶酸铬对大鼠体重及血脂的影响,将50只大鼠按血清总胆固醇(TC)水平随机分为阴性对照组、高脂对照组和3个添加不同剂量的吡啶酸铬组40.0、80.0、160.0μg/kg BW(分别相当于每天摄入三价铬5.0、10.0、20.0μg/kg BW)。每周称重1次。第5周末断头取血,测TC、TG和HDL-C;剥离肾及睾丸周围脂肪并称重。结果显示:高脂对照组与阴性对照组相比,大鼠体重、体脂比、TC、TG水平显增加。3个吡啶酸铬添加组大鼠体重、体脂比、TC、TG水平均低于高脂对照组,且差异有显性或极显性;160.0μg/kg BW吡啶酸铬添加组大鼠的HDL-C水平明显高于高脂对照组。提示在本试验条件下吡啶酸铬可降低高血脂大鼠的体重、体脂比、TC、TG水平,高剂量的三价铬还可升高HDL-C水平。 相似文献
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研究α-亚麻酸钙(Ca—ALA)的降血脂作用。将健康昆明种小鼠随机分为空白组、模型组、低级量组、中剂量组和高剂量组,模型组和剂量组饲喂高脂饲料造小鼠高脂模型;低、中、高剂量组的小鼠在建模7d后,向其高脂饲料中分别添加0.095%、0.190%、0.380%的α-亚麻酸钙粉剂。每周称体重,6周后测定小鼠肝指数和血清中总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL—C)和低密度脂蛋白胆固醇(LDL-C)的含量。结果表明,α-亚麻酸钙能明显降低高血脂小鼠的体重和肝指数,并显著降低高血脂症小鼠血清TC、TG和LDL—C水平。α-亚麻酸钙具有显著的调节小鼠脂质代谢的作用。 相似文献
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研究了葱白多糖对大鼠血脂水平的影响以及对小鼠脂肪肝的预防作用。在研究多糖的降血脂功能试验中,设对照组和葱白多糖低、中、高剂量组,分别为100、200、400 mg/kg(以体重计),连续给大鼠灌胃30 d后取尾血,测定血清TC、TG和HDL-C的含量。结果表明:多糖降血脂效果优于血脂康,且高剂量组降血脂效果优于低剂量组;高剂量组对大鼠TG降低显著、对TC降低不显著;各剂量组均对HDL-C升高显著。在研究多糖对小鼠酒精肝预防作用的试验中,设对照组和葱白多糖低、中、高剂量组(剂量同上),连续给小鼠灌胃30 d后,测定肝脏MDA、血清TG和GSH的含量。结果表明:多糖对酒精肝预防作用较水飞蓟素弱;高剂量组对TG降低显著、对GSH升高显著;各剂量组均对MDA降低显著。由此看来,葱白多糖对大鼠有降血脂功能,对小鼠的酒精肝预防作用较弱。 相似文献
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柴达木盆地唐古特白刺籽油的安全性与降血脂作用 总被引:2,自引:0,他引:2
对柴达木唐古特白刺种籽油的安全性和降血脂作用进行了研究。以超临界CO2萃取技术提取白刺种籽油,采用小白鼠进行急性毒性实验和安全性评价,以高脂例料诱导建立大鼠高脂动物模型,灌胃种籽油4w,测定动物血清血脂水平。结果表明,小鼠每日给予白刺籽油40ml/kg,连续观察14d,无毒性表现,服用安全;种籽油5g/kg和10g/kg剂量对高脂饲料诱导的大鼠血清TC、TG及LDL具有显著的抑制作用,可显著升高高血脂大鼠HDL/TC和HDL/LDL的比值,表明高剂量白刺种籽油具有显著的降血脂作用。 相似文献
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为研究发酵型八渡笋调节血脂的作用 ,观察了发酵型八渡笋对高脂血症大鼠血清脂质的影响。分别在高脂饲料中加入 2 5 %、5 0 %、10 0 %的发酵型八渡笋为八渡笋低、中、高剂量组。实验周期 4周 ,测定血清中总胆固醇 (TC)、甘油三酯 (TG)和高密度脂蛋白胆固醇 (HDL C)的水平。结果显示发酵型八渡笋各实验组大鼠血清中TC水平明显低于高脂饲料对照组 ,差异有显著性 (P <0 0 5 )。各实验组血清TG水平与高脂饲料对照组比较均有降低 ,但差异无显著性。提示发酵型八渡笋有降低高脂大鼠血清TC水平的作用 ,对甘油三酯的影响有待进一步研究 相似文献
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麦胚黄酮抗动脉粥样硬化体内机制的研究 总被引:3,自引:0,他引:3
研究不同剂量的麦胚黄酮(Flavonoids of Wheat Germ)对高脂血症大鼠血清和肝脏中胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白胆固醇(HDL-C)、肝体比值以及血清中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH—Px)和脂质过氧化物(LPO)的影响。结果表明,麦胚黄酮可明显地降低大鼠血清和肝脏中TC、TG的含量(P〈0.01,P〈0.05),提高HDL—C的含量(P〈0.01),另外,麦胚黄酮对高脂血症大鼠具有较强的抗氧化作用,能显著降低血清和组织中LPO含量(P〈0.01),提高SOD和GSH—Px的活性(P〈0.05)。提示,麦胚黄酮具有治疗和预防动脉粥样硬化的作用。 相似文献
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植物甾醇调节血脂功能的研究 总被引:6,自引:1,他引:5
研究采用高血脂SD大鼠模型,在高脂饲料中分别添加2%和5%的植物甾醇。饲喂6周后,两个剂量组与高脂组对比发现:植物甾醇可以有效降低TC、TG水平和升高HDL水平。在TC水平上高剂量组出现显著性差异(p<0.05),在TG水平上低、高剂量组分别出现显著性差异(p<0.05)和高度显著性差异(p<0.01),在HDL水平上两者都出现高度显著性差异(p<0.01)。由此证明,植物甾醇是一种非常有效的调节血脂的功能性成分。 相似文献
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蛋白质水解度测定方法综述 总被引:27,自引:0,他引:27
对目前国内外常用的蛋白质水解度测定方法进行了综述,其中pH—state方法是通过滴定水解过程中释放的质子测定DH;OPA、TNBS及国内常用的水合茚三酮和甲醛等测定方法是利用游离氨基的反应测定DH。 相似文献
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研究了聚多元羧酸盐的合成方法及反应机理,将其应用于洗涤剂和PVC制品中分别代替三聚磷酸钠和邻苯二甲酸二丁酯,证明有良好效果。 相似文献
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SUMMARY: A partially purified immunoglobulin G (lgG) solution prepared from the serum of species to be tested was heated to the specifications for sausages. The resulting supernatant fluid was decanted and the precipitate washed with saline and used to immunize rabbits. The supernatant fluid was used to sensitize tanned sheep red blood cells. The immune serum was rendered monospecific by absorptions with heterologous, heated lgG precipitates. A sample of monospecific immune serum was absorbed with a washed homogenate of sausage. Aliquots of the monospecific immune serum, both untreated and sausage absorbed, were tested with cells sensitized with the homologous heated lgG supematant fluid. A significant reduction of titer by sausage absorption indicated that the sausages contained the meat homologous to the immune serum. 相似文献
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SUMMARY— The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2,3-diaminopropionic acid, was not effective, nor was αβω-diaminc acid, 3,6-diaminohexanoic acid, although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it has not been possible to draw detailed conclusions about the mechanism of stabilization, nor can a detailed structure of the stabilized complex be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice. 相似文献
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Hop oil emulsions prepared from different varieties of hops have been found to exhibit enhanced physical stability on the addition of blends of the emulsifiers Span 20/Tween 80 or Span 60/Tween 60. Examination of the particle size and volume distributions of an emulsion by use of a Coulter Counter was found to be an excellent method of monitoring its stability. An indication as to the relative efficiency of emulsifiers can be obtained from Coulter Counter measurements on hop oil emulsions after storage for 4 days. The use of an ultracentrifuge provies a rapid means of testing emulsion stability and hence the effectiveness of emulsion stabilizers. 相似文献
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矩阵乘积的行式,列式 总被引:1,自引:0,他引:1
张静 《郑州轻工业学院学报(自然科学版)》1997,12(3):72-74
给出了m×m矩阵与m×n矩阵的行(列)式的表达式.若A=a11a12…a1ma21a22…a2m……am1am2…ammB=b11b12…b1nb21b22…b2n……bm1bm2…bmn分别是m×m,m×n矩阵,则|A||B|=|AB|+∑i1<i2<…<itj1<j2<…<jt1≤t≤mn-t≥mNBi1i2…itj1j2…jtNAB1…m(-1)st+1jt+1…(-1)snjn其中i1,i2,…,it是1,2,…,m中t个数码;j1,j2,…,jt,jt+1,…,jn是1,2,…,n的一个排列;sr=π(j1,j2,…,jt,jr)(r=1,2,…,n)是排列j1,j2,…,jt,jr的反序数. 相似文献
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《中国服装(北京)》2013,(19):130-133
一场流光溢彩、赏心悦目的展览,一段百年风尚演进的传奇旅程,一次东西方文化艺术的完美对话。2013年9月13日,“博萃臻艺一中西方珍宝艺术展”在辽宁省博物馆举行了隆重的开幕仪式,法兰西共和国驻华大使白林女士、辽宁省文物局局长丁辉先生、辽宁省博物馆馆长马宝杰先生、卡地亚全球总裁兼首席执行官邓阁仕先生、卡地亚区域行政总裁(北亚洲)陆慧全先生、卡地亚中国区首席执行官陆意斯先生、辽宁省文物店总经理张春鹰先生,以及众多文化界与文博界的贵宾齐聚一堂,共同见证了这场文化艺术盛事。 相似文献
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ABSTRACT— The effect of time, temperature and rpm of comminution of emulsions was determined on the dispersion of approximately 25% of beef fat, pork fat or cottonseed oil in frankfurters. The numbers of lipid particles 5 μ or less in diameter increased in frankfurters containing either beef or pork fat as comminution was continued to higher temperatures, with pork fat dispersed more thoroughly. Fat tended to separate from frankfurters containing beef fat in particles 200 μ or more in diameter. In contrast, no specific degree of dispersion of particles 5 μ or less in diameter consistently indicated emulsion stability, or its lack. Increased rpm during comminution produced an increased dispersion of beef or pork fat. Under the same conditions pork fat was dispersed more finely than beef fat. Dispersion of cottonseed oil produced finely dispersed particles beyond the resolution of light microscopy, as was confirmed by electron microscopy which showed a substantial number of particles to be less than 1 μ in diameter. 相似文献
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张仲民 《郑州轻工业学院学报(自然科学版)》1993,8(3):21-24
本文基于点的复合运动理论,用球坐标法推导出点的速度及加速度的计算公式,进一步论证了理论力学中点的速度,加速度公式的正确性。 相似文献