超级水果蓝莓

近几年,我国市场上的蓝莓类产品越来越多,涵盖了饮料、冰酒、干红酒、果酒、果酱、干果、糖果等等.虽然蓝莓已经成为售价不菲的高档食品,但高价格却没有成为高门槛,随着人们对蓝莓营养和保健价值的进一步认识,蓝莓果及其加工产品已成为市场上的热销产品.     

一日一苹果医生远离我

人们都知道常吃水果对身体有益,但水果都有什么营养、我们应该怎样去吃未必人人皆知. 我们或许能从西方一句谚语中找到答案:"一日一苹果,医生远离我."苹果真的有这么奇妙吗?和其他水果相比,苹果含有一种宝贵的果胶成份,这是一种可溶性纤维质,一个中等大小的苹果含有五克这类纤维,比大部分果类所含的都要多.它和胆固醇结合后,会帮助人体将胆固醇排出体外,达到降低胆固醇沉积的目的.另外,今天食无定时的繁忙一族,因胆囊缺乏进食的刺激而较少排出胆汁,胆汁在不断浓缩下,很容易形成胆结石.苹果里的果胶会和胆囊中的胆固醇结合排出,可以稀释胆汁,有预防胆结石的效果.     

蔬菜水果中25种有机氯农药残留快速检测方法

采用固相萃取替代传统的液-液萃取技术和柱层析前处理技术，使蔬菜、水果中有机氯25种农药残留迅速得到分离、净化和浓缩．用双柱双ECD气相色谱同时定性、定量测定25种有机氯农药残留；25种农药在6种蔬菜、水果中3个浓度添加水平，平均回收率为70％-120%，变异系数小于20％，在HP-l和HP-17柱上最低检出限分别为：0．0011-0．0600mg／kg，0．0010—0．7575mg／kg．一个蔬菜、水果样品经一次处理，在1．0-l5小时内即可完成农药残留的检测，确定有无超标和违禁农药残留。     

Effects of mixture ratio on anaerobic co-digestion with fruit and vegetable waste and food waste of China

The biochemical methane potentials for typical fruit and vegetable waste (FVW) and food waste (FW) from a northern China city were investigated, which were 0.30, 0.56 m3 CH4/kgVS (volatile solids) with biodegradabilities of 59.3% and 83.6%, respectively. Individual anaerobic digestion testes of FVW and FW were conducted at the organic loading rate (OLR) of 3 kg VS/(m3 day) using a lab-scale continuous stirred-tank reactor at 35°C. FVW could be digested stably with the biogas production rate of 2.17 m3/(m3 day) and methane production yield of 0.42 m3 CH4/kg VS. However, anaerobic digestion process for FW was failed due to acids accumulation. The effects of FVW: FW ratio on co-digestion stability and performance were further investigated at the same OLR. At FVW and FW mixing ratios of 2:1 and 1:1, the performance and operation of the digester were maintained stable, with no accumulation of volatile fatty acids (VFA) and ammonia. Changing the feed to a higher FW content in a ratio of FVW to FW 1:2, resulted in an increase in VFAs concentration to 1100–1200 mg/L, and the methanogenesis was slightly inhibited. At the optimum mixture ratio 1:1 for co-digestion of FVW with FW, the methane production yield was 0.49 m3 CH4/kg VS, and the volatile solids and soluble chemical oxygen demand (sCOD) removal efficiencies were 74.9% and 96.1%, respectively.     

为健康生活选择它们

对症吃水果◆高胆固醇者多进食苹果。◆糖尿病患者可以适量食用菠萝、杨梅、樱桃和梨。◆肝病患者要常食香蕉、苹果、西瓜、梨和大枣。◆肠道较弱者应常食苹果、石榴、荔枝、橘子。◆高血压患者要多吃香蕉和苹果。◆冠心病患者应常食柑橘、柚子、草莓和杏。◆哮喘病患者要常吃梨和荔枝。◆患有百日咳的患者应吃橄榄、罗汉果。◆患有咽喉疾     

六大水果巧治职业病

职业病问题很常见,比如,公交车司机饮食不正常、长期驾驶,容易出现疲劳、贫血等问题,而秋季上市的软柿子就有助于抗疲劳。     

极具开发潜力的热带水果——番荔枝

介绍了番荔枝的基本生物特性、食用价值及药用开发价值,并提出了简单有效的保鲜加工方法,这为消费者常年提供营养美味的热带水果－番荔枝成为可能,同时也为热带、亚热带区域种植、加工番荔枝提供了一条有价值的开发途径。     

固相萃取- GC/MS 法测定蔬菜水果中烯酰吗啉残留量

采用固相萃取-气相色谱／质谱联用法测定蔬菜水果中烯酰吗啉残留,优化了试验条件。方法在0.100mg／L－5.00mg／L范围内线性良好,最低检出限为0.0020mg／kg,实际样品测定的RSD≤4.6％,基质加标回收率为86.0％－96.0％。     

本刊声明

一,不要立刻吃水果。水果中含有类黄铜化合物,摄入后经肠道细菌作用转化为二羟苯甲酸,而摄入的蔬菜中含有硫氰酸盐,在这两种化学物质作用下,会干扰甲状腺功能,可导致非碘性甲状腺肿。