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1.
栀子黄色素是从栀子中提取的优良天然黄色素,具有一定的营养和保健价值,在食品加工业和饮料制造业中被广泛应用。对栀子黄色素的提取、分离方法和精制工艺等进行了简要综述,以期为栀子黄色素的开发提供一定的理论基础和依据。  相似文献   

2.
栀子黄色素的提取及精制研究   总被引:1,自引:1,他引:0  
本文通过正交试验,确定了超声波法提取栀子黄色素的最佳工艺条件为:乙醇溶液60%、温度为45℃、提取时间20min。同时,本文对几种大孔树脂对栀子黄色素的精制条件和效果进行了研究。结果表明:D3520、D140树脂的精制效果较好,适合制备高色价的栀子黄色素。经D140树脂精制后的栀子黄色素的色价达到401,得率为1.80%;经D3520树脂精制后的栀子黄色素的色价达到434,得率为1.33%。二者比较,D3520精制的栀子黄色素的色价略高,OD比值略低,而D140树脂的吸附容量更大。  相似文献   

3.
提高栀子果中栀子黄色素的提取率对后期栀子黄色素的精制及应用具有积极促进作用。该研究旨在建立一种从栀子果实中提取栀子黄色素的有效经济方法。通过超声辅助法研究栀子果实中粒度、提取时间、提取温度、提取剂浓度及液料比对栀子黄色素提取率的影响,基于单因素实验结果,采用五因素三水平的响应面法优化提取工艺,以提高栀子黄色素的提取率。结果显示,栀子黄色素的最佳提取工艺是提取时间31 min、提取温度62℃、液料比25∶1、乙醇浓度48%、粒度80目。采用响应面法优化后的提取工艺,栀子黄色素实际平均提取率为18.36%,与响应预测值18.38%相差0.02%,误差为0.19%,误差较小,说明该工艺具有良好的可靠性。与单因素实验相比,优化后的提取工艺将栀子黄色素的提取率从15.15%提高到18.36%,故优化后的工艺有利于栀子黄色素的提取,具有实际应用价值。  相似文献   

4.
栀子黄色素的提取及精制研究   总被引:1,自引:0,他引:1  
通过正交试验,确定了超声波法提取栀子黄色素的最佳工艺条件为:乙醇溶液60%、温度为45 ℃、提取时间20 min.同时,对几种大孔树脂对栀子黄色素的精制条件和效果进行了研究.结果表明:D3520、D140树脂的精制效果较好,适合制备高色价的栀子黄色素.经D140树脂精制后的栀子黄色素的色价达到401,得率为1.80%;经D3520树脂精制后的栀子黄色素的色价达到434,得率为1.33%.二者比较,D3520精制的栀子黄色素的色价略高,OD比值略低,而D140树脂的吸附容量更大.  相似文献   

5.
栀子是一种药食两用的植物资源,栀子黄色素是从栀子果实中分离出的活性成分,属于天然水溶性类胡萝卜素。研究表明,栀子黄色素具有抗氧化、抗肿瘤、抗抑郁、抗炎以及降血糖降血压等多种活性功能。因此,在食品及医药等领域极具开发潜力。但目前有关栀子黄色素药理活性的研究还不够系统,有必要对其进行详细分析与总结。本文简要综述了栀子黄色素的提取及精制方法,如传统溶剂浸提法、超声波提取法、柱层析法和膜分离法等,并在此基础上针对栀子黄色素的药理活性进行了系统的论述,总结了其治疗疾病的机制,以期为栀子黄色素的深入研究与应用提供理论指导。  相似文献   

6.
不同提取工艺对栀子黄色素提取效果的比较   总被引:10,自引:0,他引:10  
在制备双酶水解栀子黄色素母液的基础上,分别采用溶剂提取、超声波萃取、D101树脂吸附、超滤膜分离、超临界CO2萃取5种不同的提取方法,研究栀子黄色素提取率、色价和OD比值,为栀子黄色素提取分离与精制中组合现代先进技术提供理论基础。研究结果表明:超滤膜分离与大孔树脂吸附工艺结合,既能实现高提取率、高色价,以及减轻树脂吸附负荷和提高工作效率,又可降低OD比值;把超声波萃取和超-1名界萃取进行组合,也能达到很好的效果。  相似文献   

7.
栀子黄色素是从茜草科植物栀子的果实中提取的天然食用色素,其主要有效成分是藏花素和藏花酸。栀子黄具有较好的稳定性,着色力强,安全性好,具有一定的保健作用。在国内食品行业中栀子黄色素在方便食品中的应用越来越广泛,但添加量很低。我国现行的栀子黄色素国标检验方法是以甲醇为提取剂,由于栀子黄色素在甲醇中的溶解度较低,提取效果受到较大影响。因此,优化方便食品等固体食品中栀子黄色素的提取方法,提高提取效率,对低含量栀子黄色素食品的检测具有重大意义。本文以方便面为原料,探索优化栀子黄色素提取溶剂,为栀子黄色素的科学检测提供实验基础。  相似文献   

8.
栀子色素研究进展   总被引:9,自引:0,他引:9  
汤兴俊  卢林海 《食品科学》2005,26(12):254-256
栀子中含有的栀了黄色素是优良的天然黄色素,具有广泛的应用价值。并且从栀子中的栀子甙可制备出栀了蓝和栀子红色素。本文对栀子黄色素的提取、分离方法和栀子黄色素产生绿变原因等进行了简要综述,并简要介绍了栀子蓝和栀子红色素的研究进展。  相似文献   

9.
大孔树脂YWD09A5精制栀子黄色素的工艺研究   总被引:2,自引:0,他引:2  
为降低栀子黄色素中栀子苷的含量,以提高栀子黄色素稳定性,本文考察了YWD09A5、H103等11种大孔树脂对栀子黄色素和栀子苷的吸附性能。结果表明:YWD09A5大孔树脂选择性吸附藏花素的能力较强。且得到了YWD09A5吸附树脂精制栀子黄色素的适宜工艺条件,在此条件下,得到色价〉560、OD值〈0.20的高品质栀子黄色素。  相似文献   

10.
防止栀子黄色素绿变方法及性能的研究   总被引:3,自引:0,他引:3  
栀子黄色素是从茜草科植物栀子果实中提取的水溶性色素,安全无毒,资源广泛,但经过长期使用发现,当栀子黄色素用于面类制品着色时,易发生绿变,另外与大多数天然色素一样,栀子黄色素也有稳定性差的弱点。本文提出了多种防止栀子黄色素面类制品绿变的方法,并在研究中发现,层析是提高栀子黄色素稳定性的有效途径。  相似文献   

11.
Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.  相似文献   

12.
An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.  相似文献   

13.
The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.  相似文献   

14.
The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.  相似文献   

15.
16.
A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.  相似文献   

17.
Capillary electrophoresis (CE) and polarized light microscopy (PLM) were utilized in the detection of the adulteration of locust bean gum with guar gum. For CE analyses, standards of locust bean and guar gums were extracted with 30% CH3CN, removing the residual proteins from the gum matrix. A 8.75 mM NaH2PO4-20.6 mM Na2B4O7 buffer, pH 9, was used to separate these proteins and to identify marker proteins that were present in the guar gum. These markers did not co-migrate with components in the extracts of mechanically processed locust bean gum, and are used as indicators of adulteration. Using PLM with toluidine blue and iodine staining techniques, unadulterated locust bean gum samples were distinguished from mixed samples through the differential staining of components in locust bean versus guar and tara gums. These experiments in the use of CE and PLM provide orthogonal and complementary methods for the verification of 'true' positives and the elimination of 'false' positives.  相似文献   

18.
BADGE.2HCl and BFDGE.2HCl were determined in 28 samples of ready-to-drink canned coffee and 18 samples of canned vegetables (10 corn, 5 tomatoes and 3 others), all from the Japanese market. HPLC was used as the principal analytical method and GCMS for confirmation of relevant LC fractions. BADGE.2HCl was found to be present in one canned coffee and five samples of corn, BFDGE.2HCl in four samples of canned tomatoes and in one canned corn. No sample was found which exceeded the 1mg/kg limit of the EU for the BADGE chlorohydrins. However the highest concentration was found for the sum of BFDGE.2HCl and BFDGE.HCl.H2O at a level of 1.5mg/kg. A Beilstein test confirmed that all cans containing foods contaminated with BADGE.2HCl or BFDGE.2HCl had at lest one part coated with a PVC organosol.  相似文献   

19.
20.
This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.  相似文献   

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