Background:Dietary supplementation with citrate-containing juices may serve as an effective alternative to potassium citrate therapy for preventing calcium oxalate stone recurrence.This study was performed to evaluate...Background:Dietary supplementation with citrate-containing juices may serve as an effective alternative to potassium citrate therapy for preventing calcium oxalate stone recurrence.This study was performed to evaluate whether consumption of lemon-tomato juice can decrease the tendency for stone formation in the urine of calcium oxalate stone formers.Materials and methods:The study was conducted as a prospective interventional randomized crossover clinical trial with a repeated-measures design.Twenty-two patients with calcium oxalate stones and no metabolic abnormalities in the urine treated with lithotripsy at a tertiary care center from August 2017 to July 2018 were recruited.After a 14-hour overnight fasting,urine samples were collected after the patients consumed either milk only or milk and lemon-tomato juice.Their urine was tested for multiple parameters,including urine pH,specific gravity,calcium-creatinine ratio,and supersaturation with sodium oxalate,followed by optical density measurement via spectrophotometry.Results:There were no significant differences in the background characteristics between the 2 groups.The optical density of the urine samples obtained after consumption of milk only was significantly higher than that after consumption of milk and lemon-tomato juice(mean=0.131 for milk only vs.0.053 for milk and lemon-tomato juice,p<0.001).The urine calcium-creatinine ratio was similar between the groups(mean=0.141 for milk only vs.0.076 for milk and lemon-tomato juice,p=0.019).Conclusions:The addition of lemon-tomato juice as a source of citrate in the diet significantly decreases the established risk factors for calcium oxalate stone formation in patients.This study was prospectively registered at CTRI under number CTRI/2017/04/008312 on April 7,2017.展开更多
脉冲电场(pulsed electric field,PEF)以其独特的非热特性和短时、高效、节能的加工特性成为果蔬汁杀菌保鲜技术的新趋势,可以在保证果蔬汁微生物安全性的同时保持其“新鲜风味”以及营养属性。该文综述了脉冲电场处理对果蔬汁品质、钝...脉冲电场(pulsed electric field,PEF)以其独特的非热特性和短时、高效、节能的加工特性成为果蔬汁杀菌保鲜技术的新趋势,可以在保证果蔬汁微生物安全性的同时保持其“新鲜风味”以及营养属性。该文综述了脉冲电场处理对果蔬汁品质、钝酶和杀菌等效果的影响以及在果蔬汁加工领域的应用现状,阐述了PEF技术在果蔬汁加工中的劣势以及与其他技术联用的优势,探讨了基于设备选用、工艺参数与食品基质间特异性、微生物亚致死导致的PEF技术的安全性等问题,分析了PEF在果蔬汁加工领域的应用前景和所面临的挑战,以期为PEF技术在果蔬加工领域的深入研究提供参考。展开更多
为充分开发胡萝卜和苹果梨资源,制备一款非浓缩还原(not from concentrate,NFC)复合果蔬汁并探究贮藏期香气物质与产品风味变化关系。以富硒胡萝卜和苹果梨为原料,以感官评分为指标,采用单因素试验及响应面法优化NFC富硒胡萝卜复合果蔬...为充分开发胡萝卜和苹果梨资源,制备一款非浓缩还原(not from concentrate,NFC)复合果蔬汁并探究贮藏期香气物质与产品风味变化关系。以富硒胡萝卜和苹果梨为原料,以感官评分为指标,采用单因素试验及响应面法优化NFC富硒胡萝卜复合果蔬汁工艺条件;通过顶空固相微萃取-气相色谱-质谱联用技术,测定分析常温不同贮藏期NFC富硒胡萝卜复合果蔬汁产生的香气成分及其变化规律。结果表明,最佳配方为复合果蔬汁添加量91.8%(富硒胡萝卜汁与苹果梨汁质量比3∶1)、白砂糖添加量8%、柠檬酸添加量0.2%,研制出的NFC富硒胡萝卜复合果蔬汁感官评分较高,为92.88;通过固相微萃取-气相色谱-质谱联用技术检测出7类共96种挥发性气味物质,不同贮藏期NFC富硒胡萝卜复合果蔬汁中挥发性气味物质种类分别为0 d 41种、7 d 44种、14 d 48种、21 d 55种、28 d 58种。在最优工艺条件下研制的NFC富硒胡萝卜复合果蔬汁,经贮藏后有利于生成多种风味成分,进而改善产品口感并赋予其典型风味,酸甜适中、营养丰富,具有浓郁的胡萝卜苹果梨复合清香味。展开更多
基金grant from the State Board for Medical Research,Government Medical College,Thiruvananthapuram,Kerala,India,a government funding agency,under grant number A2/SBMR(2016-2017)/27717/2016/MCT.
文摘Background:Dietary supplementation with citrate-containing juices may serve as an effective alternative to potassium citrate therapy for preventing calcium oxalate stone recurrence.This study was performed to evaluate whether consumption of lemon-tomato juice can decrease the tendency for stone formation in the urine of calcium oxalate stone formers.Materials and methods:The study was conducted as a prospective interventional randomized crossover clinical trial with a repeated-measures design.Twenty-two patients with calcium oxalate stones and no metabolic abnormalities in the urine treated with lithotripsy at a tertiary care center from August 2017 to July 2018 were recruited.After a 14-hour overnight fasting,urine samples were collected after the patients consumed either milk only or milk and lemon-tomato juice.Their urine was tested for multiple parameters,including urine pH,specific gravity,calcium-creatinine ratio,and supersaturation with sodium oxalate,followed by optical density measurement via spectrophotometry.Results:There were no significant differences in the background characteristics between the 2 groups.The optical density of the urine samples obtained after consumption of milk only was significantly higher than that after consumption of milk and lemon-tomato juice(mean=0.131 for milk only vs.0.053 for milk and lemon-tomato juice,p<0.001).The urine calcium-creatinine ratio was similar between the groups(mean=0.141 for milk only vs.0.076 for milk and lemon-tomato juice,p=0.019).Conclusions:The addition of lemon-tomato juice as a source of citrate in the diet significantly decreases the established risk factors for calcium oxalate stone formation in patients.This study was prospectively registered at CTRI under number CTRI/2017/04/008312 on April 7,2017.
文摘脉冲电场(pulsed electric field,PEF)以其独特的非热特性和短时、高效、节能的加工特性成为果蔬汁杀菌保鲜技术的新趋势,可以在保证果蔬汁微生物安全性的同时保持其“新鲜风味”以及营养属性。该文综述了脉冲电场处理对果蔬汁品质、钝酶和杀菌等效果的影响以及在果蔬汁加工领域的应用现状,阐述了PEF技术在果蔬汁加工中的劣势以及与其他技术联用的优势,探讨了基于设备选用、工艺参数与食品基质间特异性、微生物亚致死导致的PEF技术的安全性等问题,分析了PEF在果蔬汁加工领域的应用前景和所面临的挑战,以期为PEF技术在果蔬加工领域的深入研究提供参考。
文摘为充分开发胡萝卜和苹果梨资源,制备一款非浓缩还原(not from concentrate,NFC)复合果蔬汁并探究贮藏期香气物质与产品风味变化关系。以富硒胡萝卜和苹果梨为原料,以感官评分为指标,采用单因素试验及响应面法优化NFC富硒胡萝卜复合果蔬汁工艺条件;通过顶空固相微萃取-气相色谱-质谱联用技术,测定分析常温不同贮藏期NFC富硒胡萝卜复合果蔬汁产生的香气成分及其变化规律。结果表明,最佳配方为复合果蔬汁添加量91.8%(富硒胡萝卜汁与苹果梨汁质量比3∶1)、白砂糖添加量8%、柠檬酸添加量0.2%,研制出的NFC富硒胡萝卜复合果蔬汁感官评分较高,为92.88;通过固相微萃取-气相色谱-质谱联用技术检测出7类共96种挥发性气味物质,不同贮藏期NFC富硒胡萝卜复合果蔬汁中挥发性气味物质种类分别为0 d 41种、7 d 44种、14 d 48种、21 d 55种、28 d 58种。在最优工艺条件下研制的NFC富硒胡萝卜复合果蔬汁,经贮藏后有利于生成多种风味成分,进而改善产品口感并赋予其典型风味,酸甜适中、营养丰富,具有浓郁的胡萝卜苹果梨复合清香味。