随着生活节奏的加快,人们对方便食品的需求日益增大,汤类预制菜肴营养简便,符合现代人的需求。胶体纳米颗粒(colloidal nanoparticles,CNPs)作为汤中营养物质的主要存在形式,通过探究其冻藏稳定性,可为汤类预制菜肴的生产和贮藏提供科...随着生活节奏的加快,人们对方便食品的需求日益增大,汤类预制菜肴营养简便,符合现代人的需求。胶体纳米颗粒(colloidal nanoparticles,CNPs)作为汤中营养物质的主要存在形式,通过探究其冻藏稳定性,可为汤类预制菜肴的生产和贮藏提供科学依据。该研究对0、7、14 d冻藏的羊骨汤(sheep bone soup,BS)、羊肉汤(sheep meat soup,MS)、羊骨肉汤(sheep bone and meat soup,BMS)分离出的CNPs营养成分和胶体学性质进行测定。此外,利用扫描电子显微镜表征CNPs的形貌,通过傅里叶变换近红外光谱分析二级结构。结果表明,随着冻藏时间的增加,BS和MS组CNPs的蛋白质和甘油三酯含量减少,3组CNPs总糖含量增加。BS和MS组CNPs的粒径增大,光散射强度减小。而BMS组CNPs营养成分和胶体学性质变化较小(P>0.05)。此外,BS和MS组CNPs发生聚集,BMS组CNPs分散良好,但3组CNPs二级结构无明显变化。因此,BMS组CNPs冻藏稳定性最佳,建议采用骨肉结合作为汤类预制菜肴的原料。展开更多
In the solution containing ammonia,silver nitrate was reduced by tartaric acid,and nano-silver colloids were generated.The products were characterized by transmission electron microscope(TEM) and X-ray diffraction(XRD...In the solution containing ammonia,silver nitrate was reduced by tartaric acid,and nano-silver colloids were generated.The products were characterized by transmission electron microscope(TEM) and X-ray diffraction(XRD).The results show that the average size of silver colloid particles is 25-30 nm and the shape is near-spherical.Researches on the character of resonance light scattering(RLS) of nano-silver colloid indicates that the strongest RLS peak of nano-silver colloid appeares at 447 nm.When BSA adding into the nano-silver colloid solution,the RLS peaks intensity was quenched.Based on this,a novel and simple method of determination of BSA was developed.Under optimum conditions,the linear response is over the range of 2.5pg/mL～2.5×106 pg/mL.展开更多
文摘随着生活节奏的加快,人们对方便食品的需求日益增大,汤类预制菜肴营养简便,符合现代人的需求。胶体纳米颗粒(colloidal nanoparticles,CNPs)作为汤中营养物质的主要存在形式,通过探究其冻藏稳定性,可为汤类预制菜肴的生产和贮藏提供科学依据。该研究对0、7、14 d冻藏的羊骨汤(sheep bone soup,BS)、羊肉汤(sheep meat soup,MS)、羊骨肉汤(sheep bone and meat soup,BMS)分离出的CNPs营养成分和胶体学性质进行测定。此外,利用扫描电子显微镜表征CNPs的形貌,通过傅里叶变换近红外光谱分析二级结构。结果表明,随着冻藏时间的增加,BS和MS组CNPs的蛋白质和甘油三酯含量减少,3组CNPs总糖含量增加。BS和MS组CNPs的粒径增大,光散射强度减小。而BMS组CNPs营养成分和胶体学性质变化较小(P>0.05)。此外,BS和MS组CNPs发生聚集,BMS组CNPs分散良好,但3组CNPs二级结构无明显变化。因此,BMS组CNPs冻藏稳定性最佳,建议采用骨肉结合作为汤类预制菜肴的原料。
文摘In the solution containing ammonia,silver nitrate was reduced by tartaric acid,and nano-silver colloids were generated.The products were characterized by transmission electron microscope(TEM) and X-ray diffraction(XRD).The results show that the average size of silver colloid particles is 25-30 nm and the shape is near-spherical.Researches on the character of resonance light scattering(RLS) of nano-silver colloid indicates that the strongest RLS peak of nano-silver colloid appeares at 447 nm.When BSA adding into the nano-silver colloid solution,the RLS peaks intensity was quenched.Based on this,a novel and simple method of determination of BSA was developed.Under optimum conditions,the linear response is over the range of 2.5pg/mL～2.5×106 pg/mL.
基金Supported by National Basic Research Program of China(No.2010CB933700 and 2011CBA00900)STCSM(No.09ZR1436000)the Knowledge Innovation Program of CAS(No.KSCX2-YW-G-042)
