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南瓜浸提液对冷却羊肉的保鲜效果 被引量:18
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作者 顾仁勇 唐碧华 傅伟昌 《食品科学》 EI CAS CSCD 北大核心 2006年第3期228-230,共3页
采用滤纸片法测定了南瓜浸提汁液对多种供试菌的抑菌圈直径,并研究了以南瓜浸提汁液为保鲜液浸泡羊肉,结合真空包装,在0~4℃下贮藏的保鲜效果。结果表明:南瓜浸提汁液对五种供试细菌的抑制效果较好,对酿酒酵母和曲霉抑制效果一般,对假... 采用滤纸片法测定了南瓜浸提汁液对多种供试菌的抑菌圈直径,并研究了以南瓜浸提汁液为保鲜液浸泡羊肉,结合真空包装,在0~4℃下贮藏的保鲜效果。结果表明:南瓜浸提汁液对五种供试细菌的抑制效果较好,对酿酒酵母和曲霉抑制效果一般,对假丝酵母、青霉、根霉抑制效果不明显;南瓜浸提汁液处理羊肉,使羊肉的保鲜期比对照组延长4~5d。 展开更多
关键词 南瓜汁 抑菌 羊肉 保鲜
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超高效液相色谱-串联质谱法测定牛羊肉中7种β-内酰胺类抗生素的残留量 被引量:10
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作者 吴强 何生虎 +3 位作者 陈娟 余永涛 雷元元 罗瑞明 《动物医学进展》 北大核心 2015年第6期64-68,共5页
建立了牛羊肉中7种β-内酰胺类药物(青霉素G、青霉素V、苯唑西林、氯唑西林、萘夫西林、头孢喹肟、头孢氨苄)残留检测的超高效液相色谱-串联质谱(UPLC-MS/MS)方法。样品经水和乙腈提取后,用正己烷去除脂肪,再用C18固相萃取柱净化,浓缩... 建立了牛羊肉中7种β-内酰胺类药物(青霉素G、青霉素V、苯唑西林、氯唑西林、萘夫西林、头孢喹肟、头孢氨苄)残留检测的超高效液相色谱-串联质谱(UPLC-MS/MS)方法。样品经水和乙腈提取后,用正己烷去除脂肪,再用C18固相萃取柱净化,浓缩定容后,供超高效液色谱-串联质谱法分析。色谱条件:Waters BEH C18色谱柱(50mm×2.1mm,1.7μm);流动相1mL/L甲酸水和乙腈进行梯度洗脱;柱温为40℃;进样量为10μL;流速为0.3 mL/min。质谱条件:电喷雾正离子(ESI+)模式电离,多反应监测(MRM)模式检测,外标法定量。结果表明,在5μg/L^500μg/L的基质匹配标准溶液内7种β-内酰胺类药物均有良好的线性关系,相关系数(r)均大于0.99;样品中7种β-内酰胺类药物的检出限(LOD)均为1ng/g,定量下限(LOQ)均为2ng/g;7种β-内酰胺类药物的平均回收率为80%~108%,相对标准偏差(RSD)小于10%。本方法能够快速、准确的检测出生鲜牛羊肉中7种β内酰胺类药物,为检测牛羊肉中β内酰胺类药物提供了技术支持。 展开更多
关键词 Β-内酰胺类抗生素 牛羊肉 超高效液相色谱串联质谱法 残留检测
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Extraction of fish body oil from Sardinella longiceps by employing direct steaming method and its quantitative and qualitative assessment
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作者 Moorthy Pravinkumar Lawrence Xavier Eugien +1 位作者 Chinnathambi Viswanathan Sirajudeen Mohammad Raffi 《Journal of Coastal Life Medicine》 2015年第12期962-966,共5页
Objective:To analyze the quantitative and qualitative properties of the extracted fish oil from Sardinella longiceps(S.longiceps).Methods:Four size groups of S.longiceps were examined for the extraction of fish oil ba... Objective:To analyze the quantitative and qualitative properties of the extracted fish oil from Sardinella longiceps(S.longiceps).Methods:Four size groups of S.longiceps were examined for the extraction of fish oil based on length.The size groups included Group I(size range of 7.1-10.0 cm),Group II(size range of 10.1-13.0 cm),Group III(size range of 13.1-16.0 cm)and Group IV(size range of 16.1-19.0 cm).Fish oil was extracted from the tissues of S.longiceps by direct steaming method.The oil was then subjected to the determination of specific gravity,refractive index,moisture content,free fatty acids,iodine value,peroxide value,saponification value and observation of colour.Results:The four groups showed different yield of fish oil that Group IV recorded the highest values of(165.00±1.00)mL/kg followed by Group III[(145.66±1.15)mL/kg]and Group II[(129.33±0.58)mL/kg],whereas Group I recorded the lowest values of(78.33±0.58)mL/kg in monsoon season,and the average yield was(180.0±4.9)mL/kg fish tissues.These analytical values of the crude oil were well within the acceptable standard values for both fresh and stocked samples.Conclusions:The information generated in the present study pertaining to the quantitative and qualitative analysis of fish oil will serve as a reference baseline for entrepreneurs and industrialists in future for the successful commercial production of fish oil by employing oil sardines. 展开更多
关键词 muttom waters Sardinella longiceps Different size group Analytical properties Purified oil
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