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A rapid and reliable PCR‐RFLP method was optimized to identify marine fish fillets. Seabass, seabream, umbrine, and dentex were considered in the study. After DNA extraction and PCR, the 359 bp amplification products, obtained from gene encoding the cytochrome b, were subjected to restriction enzyme analysis. All the enzymes tested were not able to distinguish all the 5 species at the same time, but the combination of the results obtained from the digestion HaeIII and NlaIII can be used to differentiate the fish fillets considered. The method described is sensitive, rapid, and reliable, and it could be used to expose fraudulent substitutions with less valuable fish. 相似文献
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目的:建立基于实时荧光PCR技术的食品中牛源性成分快速检测方法。方法:以牛线粒体细胞色素b为目的基因,设计特异性引物和探针,通过特异性、灵敏性实验,及模拟混合肉样和市售肉制品检测,对该体系进行验证。结果:该牛源荧光PCR检测体系具有很好的特异性及灵敏性,可检测1pg牛源DNA的存在,对于各模拟肉类样品中掺杂的牛源性成分,其检测限低至0.5%,且经市售加工食品验证具有较好的应用能力。结论:所建立的牛引物探针体系具有特异性好、灵敏度高,快速高效等优点,可用于对食品中牛源性成分的掺假鉴别检测。 相似文献
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目的:建立基于实时荧光聚合酶链式反应技术的食品中鸡源性成分快速检测方法。方法:以鸡线粒体细胞 色素b为目的基因,设计特异性引物和探针,通过特异性、灵敏性实验及模拟混合肉样和市售肉制品检测,对该体 系进行验证。结果:该鸡源荧光聚合酶链式反应检测体系具有很好的特异性及灵敏性,可检测3.5 pg/μL鸡源DNA 的存在;经含鸡源成分的模拟混合肉样检测,证实体系抗干扰能力强;并且通过市售食品检测表明体系可用于定性 加工食品中的鸡源成分。结论:所建立的鸡源引物探针体系具有特异性好、灵敏度高、快速高效等优点,可用于对 食品中鸡源性成分的掺假鉴别。 相似文献
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膨化食品有即食方便、口感松软、自然和谐、酥脆可口等特点深受人们喜爱。本文介绍了目前膨化食品的现状,并提出以猪肉、猪皮、谷物为原料,对研究开发既有良好的膨化效果,又能在营养成份、色泽、风味、口感方面均有较大提高的营养型膨化食品进行了可行性分析,以期开发出新型猪肉微波膨化休闲食品,提高猪肉的附加值。 相似文献
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Lin Yao Jianping Lu Meng Qu Yanhua Jiang Fengling Li Yingying Guo Lianzhu Wang Yuxiu Zhai 《Food Science & Nutrition》2020,8(7):3138-3146
The Thunnini, or tuna, comprise many species with very different commercial values. The principal raw tuna product on the market is sashimi, for which the species used is difficult to identify through conventional morphological analysis. The present study amplified the cytochrome b gene (Cytb) of 4 major tuna species used for preparing sashimi—yellowfin tuna (Thunnus albacares), southern bluefin tuna (Thunnus maccoyii), bigeye tuna (Thunnus obesus), and Atlantic bluefin tuna (Thunnus thynnus)—and 4 species commonly mislabeled as components of tuna sashimi—albacore tuna (Thunnus alalunga), skipjack tuna (Katsuwonus pelamis), striped marlin (Tetrapturus audax), and swordfish (Xiphias gladius). Polymerase chain reaction (PCR) amplicons were digested with 5 restriction enzymes—Eco147 I, Hinf I, Mbo I, Xag I, and Hind II—to obtain characteristic restriction maps of the above‐mentioned raw tuna species and the commonly mislabeled species. An identification method using PCR restriction fragment length polymorphism (PCR‐RFLP) was established and validated using 39 commercial tuna sashimi samples, which verified that this method provides results consistent with those obtained by classical sequencing. PCR‐RFLP has several advantages over classical sequencing, such as simplicity, speed and accuracy. This technique could support species identification for raw tuna and sashimi. 相似文献
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Identification of Flatfish Species Using Polymerase Chain Reaction (PCR) Amplification and Restriction Analysis of the Cytochrome b Gene 总被引:1,自引:0,他引:1
ANA CÉSPEDES TERESA GARCÍA ESTHER CARRERA ISABEL GONZÁLEZ BERNABÉ SANZ PABLO E. HERNÁZ ROSARIO MARTÍN 《Journal of food science》1998,63(2):206-209
Restriction site analysis of PCR products from a conserved region of the cytochrome b gene has been used for the specific identification of sole ( Solea solea ), European plaice ( Pleuronectes platessa ) and flounder ( Platichthys flesus). Polymerase chain reaction (PCR) amplification of the cytochrome b gene using universal primers produced a 359 bp fragment in all species analyzed. Digestion of the PCR products with Nci I, Sau 3AI and Hinf I endonucleases, followed by agarose gel electrophoresis of the digested PCR products, yielded specific profiles that enabled direct identification of the fish species. This methodology should prove useful for enforcing labeling regulations in the authentication of flatfish species. 相似文献
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本文对转基因稻米及其加工食品进行了针对标记基因bar、CaMV35S启动子和Nos终止子DNA序列的PCR检测.结果表明,改良SDS法适于提取转基因稻米以及经过蒸煮、微波膨化加工后稻米食品中的DNA并能够满足PCR检测的需要.食品加工使稻米基因组DNA降解为较小的片段,但不影响PCR检测效果,PCR技术能够检测稻米加工食品中的转基因成分. 相似文献
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广东省牛羊肉及其制品中掺杂掺假情况的调查分析 总被引:2,自引:1,他引:1
目的对广东省内牛、羊肉及其制品中掺杂掺假情况进行风险监测,从而为监管部门的后续监督管理提供指导性意见。方法使用特异性引物和探针,对广东省市场上出售的牛、羊肉及其制品进行动物源性成分鉴定。并与标签明示肉源进行比对,确认掺假类别。结果共检验50份样品,其中牛肉25份,羊肉8份,混合肉类17份。检出10份掺假肉食品,总掺假率为20.0%。掺假样品均为牛肉制品,羊肉制品为未发现掺假情况。结论用猪肉和鸡肉进行肉类的掺假是目前主要的掺假手段。混合肉类制品在标签明示肉类成分方面比较混乱,部分样品检出标签未标示的肉类成分。进一步开展肉制品的掺假检测具有重要的社会意义。 相似文献
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针对马线粒体DNA细胞色素b基因设计特异性引物和探针,建立食品中马源性成分实时荧光PCR检测方法,并经特异性和灵敏度试验验证其可行性。结果表明:该体系可扩增马DNA片段,长度为127 bp,其他常见畜、禽肉成分均无法正常扩增。该体系的检测灵敏度为1.25 pg马DNA和质量分数0.001%马肉粉。经市售食品的检测验证,表明所建立的马引物探针体系具有特异性好、灵敏度高、快速、高效等优点,可用于对食品中马源性成分的掺假鉴别检测。 相似文献
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生鲜肉中牛源性和羊源性成分定量检测方法的建立 总被引:1,自引:1,他引:1
目的建立生鲜肉中牛源性和羊源性成分荧光PCR定量检测方法。方法以线粒体细胞色素b(Cytb)基因核苷酸序列为检测靶点,设计并优化引物,建立基于SYBR染料的荧光PCR定量检测方法,并对该方法进行特异性和灵敏度验证。结果在退火温度60℃的条件下,荧光PCR检测体系中各条引物特异性良好,目标成分检测信号Ct值均小于20,非特异性检测信号Ct值均大于35,该方法在模板浓度为0.016~10 ng/μL时线性关系良好;以Ct30作为阳性或阴性结果的判定限,目标源性成分荧光PCR定量检测的灵敏度可达1%。结论本方法可为生鲜肉制品种源鉴定和掺假检测提供理论依据。 相似文献
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Elena Sánchez‐Zapata José Angel Pérez‐Alvarez Juana Fernández‐López 《International Journal of Food Science & Technology》2012,47(10):2198-2204
Co‐products from the tiger nut milk industry can be given added value if they are used in the manufacturing process of other food products. The aim of this study was to analyse the effect of using tiger nut milk liquid co‐product as a substitute for the water added to pork burger formulations. The results showed that its use in pork burger delayed lipid oxidation and improved cooking properties (less shrinkage), while no significant changes in nutritional value were observed. Pork burgers containing tiger nut liquid co‐product were perceived to be juicier and less fatty than the control, contributing to higher scores for overall liking. 相似文献
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RAFAQAT ISHAQ MUHAMMAD SULEMAN MUHAMMAD NAEEM RIAZ MUHAMMAD YOUSAF ABDULLAH SHAH ABDUL GHAFOOR 《International Journal of Dairy Technology》2013,66(1):20-24
In this study, prolactin gene polymorphism was investigated in Nili‐ Ravi buffaloes, Sahiwal and Achai cattle breeds, 100 per group, using polymerase chain reaction–restriction fragment length polymorphism (PCR‐RFLP) technique. Only genotype GG was observed in the case of Nili‐Ravi buffaloes. In Sahiwal and Achai cattle, three genotypes were found, AA, AG and GG: the frequency of these genotypes were 72%, 18% and 10% in Sahiwal cattle and 44%, 34% and 22% in Achai cattle, respectively. The frequency of genotype AA was found to be higher in both cattle breeds. Results of chi‐square test at P < 0.05 revealed that animals of Achai cattle were in Hardy–Weinberg equilibrium, whereas Sahiwal cattle were found to be deviating. 相似文献
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Mehmet Karaca Ayse Gul Ince Saadet Tugrul Ay Kenan Turgut Ahmet Naci Onus 《Journal of the science of food and agriculture》2008,88(14):2508-2516
BACKGROUND: Identification of genotypes in Salvia is complicated owing to the morphological similarity and common occurrence of natural hybridisation within Salvia species. Species‐ and genotype‐specific DNA markers are very useful for plant identification, breeding and preservation programmes and can also provide a general overview on the prediction of plant essential oil yield. RESULTS: Polymerase chain reaction restriction fragment length polymorphism (PCR‐RFLP) was used for identification of species‐specific chloroplast and mitochondrial organelle DNA markers, and directed amplification of minisatellite DNA polymerase chain reaction (DAMD‐PCR) was used for genotyping of plant materials. Application of PCR‐RFLP resulted in species‐specific DNA markers, and use of DAMD‐PCR resulted in reproducible DNA patterns that are useful in Salvia genetic studies. Multivariate cluster analysis and principal coordinate analysis indicated that there were relationships between DNA marker patterns and essential oil yields at the species level. CONCLUSION: Results showed that genetic variations in Salvia are wide, and DNA patterns of relatedness among plant species appeared to correlate with essential oil yields. Further studies are required to confirm the application of PCR‐RFLP and DAMD‐PCR markers for selection of Salvia species with higher essential oil yield. Copyright © 2008 Society of Chemical Industry 相似文献
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MEMIS ÖZDEMIR 《International Journal of Dairy Technology》2011,64(3):350-352
A total of 177 cattle of four breeds were genotyped for the bovine growth hormone (BGH)‐AluI polymorphism by polymerase chain reaction‐restriction fragment length polymorphism (PCR‐RFLP). The genotype and gene frequencies for each breed were determined and tested to be in Hardy–Weinberg equilibrium. According to breeds, frequencies of allele L gene were 0.905 for Brown Swiss, 0.898 for Holstein, 0.976 for East Anatolian Red and 0.893 for Turkish Grey Breeds. The allele L was predominant and variant VV was not detected in the breeds studied. BGH‐AluI genotypes were found to be in equilibrium within and among breeds. 相似文献
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BILAL AKYUZ OZGECAN K AGAOGLU OKAN ERTUGRUL 《International Journal of Dairy Technology》2012,65(1):38-44
A total of 259 cattle of four Turkish native cattle breeds, East Anatolian Red (EAR), South Anatolian Red (SAR), Turkish Grey (TG) and Anatolian Black (AB), Holstein and Brown Swiss (BS) breeds were genotyped for kappa‐casein (CSN3), bovine growth hormone (GH1) and prolactin (PRL) polymorphism by the polymerase chain reaction and restriction length polymorphism (PCR‐RFLP). The degree of genetic differentiation between populations FST was calculated as 0.053 and was found to be significant (P < 0.001). According to the genetic distance values (Nei), the highest genetic difference was found between SAR and EAR in four Turkish native cattle breeds and this difference was significant. 相似文献
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建立一种快速、准确鉴定羊肉制品中羊源性成分并且量化羊肉成分含量的方法。以羊线粒体细胞色素b基因为靶基因,设计出具有特异性引物。选择真核生物核糖体16S rDNA为内参基因,采用实时荧光相对定量法。羊肉质量百分比的对数值与之对应的循环阈值差值ΔCt呈良好线性关系。标准曲线回归公式为y=-3.4057x-0.3112,R2=0.9916,扩增效率达E达96.62%。本试验中羊源性DNA检测限可达16 pg/μL,回收率在93.07%~106.20%。抽取8份市售羊肉制品进行检测,有3份含量低于50%。本试验中建立的实时荧光PCR检测方法操作方便、特异性强、灵敏度高,所得数据可靠,为肉制品羊源性成分检测提供了参考方法。 相似文献
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《Food Reviews International》2013,29(1):97-112
Pig derivatives such as lard and pork in any food system are prohibited for consumption by Muslims and Jews. For this reason, analytical methods offering accurate and reproducible results are needed to assure the halalness, kosherness, and wholesomeness of food. This article describes some analytical techniques, namely Fourier transform infrared (FTIR) spectroscopy, chromatography-based techniques, differential scanning calorimetric (DSC), and electronic noses for detection and quantification of pig derivatives (lard, pork, gelatin) in food products. 相似文献
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Food by‐products happen at various stages of production and processing at home and on commercial scales. In the recent years, because of the fast‐growing food companies and production, food processing by‐products have gained a lot of interest and attracted many technical and health professionals as well as policy makers internally and internationally. Also, concerns are increasing about food by‐products due to their ecological and environmental impact on the planet. This is particularly of concern when large companies emit. Large quantities of food by‐products are thrown into environment in which they can be exploited technically, medicinally, and pharmaceutically. This is due to their chemical component and biologically active compounds of the by‐products. Therefore, this systematic review focuses on the food by‐product biological compounds present in different parts of the food products, particularly in some common foods such as fruits, vegetables, cereals, dairy products, meat, eggs, nuts, coffee, and tea. Moreover, the review also explains the kind of biologically active compounds and their quantity not just in edible foods, but also in part and types of the by‐product which then can be reused and recycled into different processes in order to extract and get benefit from. 相似文献