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1.
对影响玉米须多糖提取得率的主要因素料水比、温度、时间进行了研究。正交试验结果表明,料水比、温度、时间对多糖的提取得率有较大影响,其最佳提取工艺条件为:料水比1∶8(g/mL)、温度90℃、时间3 h。  相似文献   

2.
米糠多糖提取工艺研究   总被引:13,自引:0,他引:13  
采用热水浸提法提取米糠多糖,对影响提取米糠多糖的工艺参数如浸提温度、浸提时间、 料水比等进行单因素试验,并在此基础上设计正交试验,提出提取米糠多糖最佳工艺条 件:浸提温度110℃、料水比1:20、浸提时间5小时。  相似文献   

3.
以多糖得率为评价指标,采用水提醇沉法对黄鸡枞多糖的提取工艺条件进行优化,选用单因素试验和正交试验法,考察料液比、提取温度、浸提时间3个因素对该菌多糖得率的影响。结果表明,影响黄鸡枞水溶性多糖提取率的主要因素依次为料液比提取温度浸提时间,通过正交试验确定该菌多糖的最佳提取条件为料液比1∶30,浸提温度60℃,浸提时间2 h,在此条件下,其多糖得率可达4.7%,为改善黄鸡枞多糖的提取方法提供了试验基础。  相似文献   

4.
研究藜麦种子多糖的最佳提取工艺条件及其品种间的多糖得率差异。采用水浴加热回流法,在单因素试验的基础上,选取提取温度、料液比、浸提时间进行3因素3水平的Box-Behnken中心组合研究,并运用Design Expect 8.0软件对试验数据进行分析,通过响应面分析法对提取条件进行了优化。结果表明,藜麦种子多糖的最佳提取工艺为:提取温度91℃,浸提时间1.5 h,料液比1:34,在此条件下,多糖得率在理论上可达15.81 g/100 g。各因素对多糖提取率的影响程度依次为:料液比提取温度浸提时间;同时发现藜麦种子多糖得率存在明显的品种间差异,其中品种"Quinoa B.Rain Sow"的多糖得率最高,达到15.889 g/100 g。  相似文献   

5.
冮洁  刘冰 《食品工业科技》2012,33(9):256-259
采用响应面法对杏鲍菇菌丝体胞内多糖的提取工艺进行优化。在单因素实验的基础上,以多糖得率为响应值,确定了实验参数的水平范围。结果表明:液固比、浸提温度、浸提时间和乙醇用量等因素对多糖得率的影响具显著性;杏鲍菇菌丝体多糖提取的最佳工艺参数为:液固比30∶1mL/g、浸提温度97℃、浸提时间1.8h、乙醇用量是浸提液的2.5倍,浸提1次,在该工艺条件下杏鲍菇菌丝体多糖得率为8.65%。  相似文献   

6.
响应面优化野生山毛豆多糖提取工艺的研究   总被引:1,自引:1,他引:0  
利用响应面分析法对野生山毛豆多糖的提取工艺进行优化.以浸提时间、浸提温度及水料比为响应因子,多糖提取得率为响应值,根据中心组合试验设计,做3因素3水平响应面分析.分析各个因素的显著性和交互作用,得出野生山毛豆多糖水浸提的最佳工艺条件为:浸提时间2.70 h,浸提温度为72 ℃,液料比23.4 mL/g,该条件下多糖提取率为16.83 mg/g.  相似文献   

7.
茶树花多糖提取工艺研究   总被引:6,自引:0,他引:6  
用常规水浴浸提法来提取茶树花中的多糖,研究了浸提温度、时间、料液比、次数等因素对多糖得率的影响.通过正交试验确定了最佳提取参数.结果表明e影响茶树花多糖浸提各因素的主次顺序为固液比、时间、温度,最佳提取工艺为:温度90℃、时间120min、料液比1:40,在此工艺条件下多糖提取得率2.126%.试验结果为深入研究和开发利用茶树花资源提供了依据.  相似文献   

8.
微波辅助法提取杏鲍菇多糖研究   总被引:10,自引:0,他引:10  
杜敏华  田龙 《食品科技》2007,32(3):117-119
采用热水浸提法结合微波辅助法提取杏鲍菇中的杏鲍菇多糖,对影响提取杏鲍菇多糖的工艺参数如浸提温度、浸提时间、料水比等进行单因素试验,并在此基础上设计正交试验,得出提取杏鲍菇多糖最佳工艺条件为温度50℃、时间45min、次数3次、加水量40mL。  相似文献   

9.
绿茶中提取茶多糖最佳工艺的优化   总被引:5,自引:0,他引:5  
采用单因素实验和L9(34)正交实验对绿茶中茶多糖的提取工艺进行了研究,研究了料水质量比、浸提温度、浸提时间、浸提次数对茶多糖提取的影响。结果表明,影响茶多糖得率的主次因素为:料水质量比、浸提温度、浸提次数、浸提时间;最佳提取工艺条件为:料水质量比为1∶25,提取温度85℃,提取时间为90min,提取1次。在此最佳工艺条件下,茶多糖得率为1.92%。  相似文献   

10.
用水提醇沉法提取北沙参粗多糖,通过单因素实验,以多糖提取率作为指标分别考察了浸提次数、浸提温度、浸提时间、最佳料水比对提取效率的影响。选取浸提次数(A)、浸提温度(B)、浸提时间(C)、料水比(D)4个因素设计正交试验。结果表明:影响多糖提取率的主次因素分别为CBAD,最佳提取工艺为:A3B3C3D2,即浸提次数为3次、浸提温度为90℃、浸提时间为4 h、最佳料水比为1:30。在此提取条件下,白沙参粗多糖提取率为15.59%。  相似文献   

11.
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   

12.
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   

13.
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   

14.
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   

15.
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   

16.
百年风尚     
《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   

17.
The quantitative analysis of the reaction products of the water activity dependent nonenzymatic glycosylation of lysozyme was not straightforward. Difficulties arose in the determination of the number of bound glucose molecules because glycosylation leads to glucose mediated protein aggregation, and the likely presence of a mixture of relatively labile Schiff-base intermediates, and the more stable ketoamine products generated by Amadori rearrangement. Polyacrylamide gel electrophoresis was used to monitor protein aggregation; periodate oxidation, nuclear magnetic resonance (NMR), and oxalic acid hydrolysis combined with HPLC, emerged as the most promising methods to quantitate the degree of glycosylation. Possible interpretations are advanced to explain the apparent discrepancies in degree of glycosylation suggested by the different analytical methods evaluated.  相似文献   

18.
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   

19.
矩阵乘积的行式,列式   总被引:1,自引:0,他引:1  
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   

20.
山药水溶性多糖的提取及抗氧化性研究   总被引:1,自引:0,他引:1  
研究山药水溶性多糖的提取及其抗氧化作用。方法是将小鼠分别口服给予山药水溶性多糖,每天1次,连续给药15d,取血测过氧化物酶(POD)活性,取血、肝、肾测超氧化物歧化酶(sOD)活性,脂质过氧化产物(MDA)含量。山药多糖物可显著提高POD活性及血、肝、肾的SOD活性,并减少血、肝、肾组织中MDA的含量。山药水溶性多糖有提高小鼠体内过氧化物酶、超氧化物歧化酶活性及减少脂质过氧化产物的抗氧化作用。  相似文献   

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