为了延长冷鲜鸡保鲜期,通过对未辐照对照组、辐照2.5 k Gy剂量试验组在4℃贮藏条件下,分别于0,7,14,21,28 d对冷鲜鸡菌落总数、菌相、pH值、挥发性盐基氮(TVB-N)变化进行分析。结果表明,未辐照对照组保鲜期小于7 d,第14天已腐败;辐照2.5...为了延长冷鲜鸡保鲜期,通过对未辐照对照组、辐照2.5 k Gy剂量试验组在4℃贮藏条件下,分别于0,7,14,21,28 d对冷鲜鸡菌落总数、菌相、pH值、挥发性盐基氮(TVB-N)变化进行分析。结果表明,未辐照对照组保鲜期小于7 d,第14天已腐败;辐照2.5 k Gy剂量试验组在第28天时,优势菌由初期假单胞菌和乳酸菌变成假单胞菌和肠杆菌,菌落总数、pH值、TVB-N值均低于国家标准,辐照处理可显著延长冷鲜鸡的保鲜期。展开更多
In the present study,the effects of cooked rice(CR)with added fructo-oligosaccharide(FOS)on faecal flora were studied by a simulated in vitro digestion and fermentation method.The total carbohydrate content,p H,and s ...In the present study,the effects of cooked rice(CR)with added fructo-oligosaccharide(FOS)on faecal flora were studied by a simulated in vitro digestion and fermentation method.The total carbohydrate content,p H,and s hort-chain fatty acids(SCFAs)were determined during in vitro digestion and fermentation.The change in the bacterial phase distribution after the fermentation was also analysed.The results showed that t he total carbohydrate content of the CR with added FOS(FCR)significantly decreased during the simulated digestion.Meanwhile,the p H of the FCR decreased and the SCFAs concentration increased significantly compared to those of the CR during the simulated fermentation.In addition,the FCR showed the advantage of promoting beneficial bacteria,such as Bifidobacterium and Lactobacillus,and inhibiting harmful bacteria,such as Bacteroides and Klebsiella compared to the CR.Therefore,the FOS as a prebiotic could be recommended to produce the high-quality healthy rice food.展开更多
Bacterial cellulose(BC)is one of the most versatile natural biopolymers with unique physical,chemical,and biological features.However,the lack of intrinsic antibacterial property of native BC limits its broad biomedic...Bacterial cellulose(BC)is one of the most versatile natural biopolymers with unique physical,chemical,and biological features.However,the lack of intrinsic antibacterial property of native BC limits its broad biomedical applications where such property is highly required to prevent contamination or infection caused by attached bacteria.In this work,we developed a simple and facile method to fabricate a dualfunctional BC membrane by physical incorporation of gold nanorods(GNRs)followed by deposition of a phase-transitioned bovine serum albumin(PTB)film.Due to the broad-spectrum antifouling property of the PTB film,the resulting membrane could prevent the adhesion and accumulation of bacteria.A few bacteria that broke through the protection of the PTB film could be eradicated under short-term irradiation of a near-infrared laser due to the excellent photothermal property of incorporated GNRs.The whole fabrication was conducted in a simple and environmentally friendly manner,avoiding complicated processes and toxic organic solvents.Moreover,because all the components were biocompatible,the resulting membrane showed negligible cytotoxicity in vitro and good histocompatibility in vivo.This work thus provided a reliable way to endow BC with antibacterial property,being beneficial for diverse biomedical applications.展开更多
文摘为了延长冷鲜鸡保鲜期,通过对未辐照对照组、辐照2.5 k Gy剂量试验组在4℃贮藏条件下,分别于0,7,14,21,28 d对冷鲜鸡菌落总数、菌相、pH值、挥发性盐基氮(TVB-N)变化进行分析。结果表明,未辐照对照组保鲜期小于7 d,第14天已腐败;辐照2.5 k Gy剂量试验组在第28天时,优势菌由初期假单胞菌和乳酸菌变成假单胞菌和肠杆菌,菌落总数、pH值、TVB-N值均低于国家标准,辐照处理可显著延长冷鲜鸡的保鲜期。
基金financial support from the National Key R&D Program of China(2018YFD0400500)the Key Research and Development Program of Jiangsu Province(BE2018323)Qing Lan Project of Jiangsu Province and the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)。
文摘In the present study,the effects of cooked rice(CR)with added fructo-oligosaccharide(FOS)on faecal flora were studied by a simulated in vitro digestion and fermentation method.The total carbohydrate content,p H,and s hort-chain fatty acids(SCFAs)were determined during in vitro digestion and fermentation.The change in the bacterial phase distribution after the fermentation was also analysed.The results showed that t he total carbohydrate content of the CR with added FOS(FCR)significantly decreased during the simulated digestion.Meanwhile,the p H of the FCR decreased and the SCFAs concentration increased significantly compared to those of the CR during the simulated fermentation.In addition,the FCR showed the advantage of promoting beneficial bacteria,such as Bifidobacterium and Lactobacillus,and inhibiting harmful bacteria,such as Bacteroides and Klebsiella compared to the CR.Therefore,the FOS as a prebiotic could be recommended to produce the high-quality healthy rice food.
基金financially supported by the National Natural Science Foundation of China(Nos.21774086 and 22175125)the Natural Science Foundation of Jiangsu Province(No.BK20180093)+1 种基金the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.21KJA150008)the Suzhou Municipal Science and Technology Foundation(No.SYS2018026)。
文摘Bacterial cellulose(BC)is one of the most versatile natural biopolymers with unique physical,chemical,and biological features.However,the lack of intrinsic antibacterial property of native BC limits its broad biomedical applications where such property is highly required to prevent contamination or infection caused by attached bacteria.In this work,we developed a simple and facile method to fabricate a dualfunctional BC membrane by physical incorporation of gold nanorods(GNRs)followed by deposition of a phase-transitioned bovine serum albumin(PTB)film.Due to the broad-spectrum antifouling property of the PTB film,the resulting membrane could prevent the adhesion and accumulation of bacteria.A few bacteria that broke through the protection of the PTB film could be eradicated under short-term irradiation of a near-infrared laser due to the excellent photothermal property of incorporated GNRs.The whole fabrication was conducted in a simple and environmentally friendly manner,avoiding complicated processes and toxic organic solvents.Moreover,because all the components were biocompatible,the resulting membrane showed negligible cytotoxicity in vitro and good histocompatibility in vivo.This work thus provided a reliable way to endow BC with antibacterial property,being beneficial for diverse biomedical applications.
