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Manual Traffic Exchanges This is a list of Manual traffic exchanges that you can use to get your site viewed by thousands of people a week. Manual traffic exchanges are better known for quality over the quantity you find with auto surfs. But both are great for generating traffic.

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Old 07-28-2011, 01:45 AM   #1
skyccnicke
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Default 营养盐里究竟有多少营养

  调查策划:杨波
  调查记者:王志胜
  调查地点:北京家乐福超市双井店、京客隆超市甜水园店、乐购超市大成东店
  调查顾问:北京同仁医院营养部副主任营养师,张谦;中国农业大学食品学院副教授,范志红;中盐制盐工业 研究院生产销售部,赵卫生。
  吃盐补微量元素不科学
  记者调查:超市货架上的盐多数都是加了微量元素钙、硒、锌、铁、核黄素等的营养盐,光波炉原理。“京晶锌强化营养盐”中锌含量为110~140mg/kg,“京晶硒强化营养盐”中的硒含量为3~5mg/kg。虽然大多数消费者对营养盐很感兴趣,却看不懂这些说明。
  专家点评:营养盐中加入的微量元素到底有多少呢?拿锌含量在140毫克/千克的加锌盐举例,光波炉团购,如果按世界卫生组织指导用盐标准每人每天6克计算,一个人每天从盐中摄入的锌量在0.84毫克,远低于中 国居民膳食营养推荐锌的摄入量成人男15毫克,女11.5毫克。因此,仅从盐中摄入的锌量很少 ,大概只有1/12。
  另一方面,只要合理膳食,营养均衡了,人体缺锌的可能性不大,锌的食物来源比较广泛。比如鸡蛋中的锌含 量是0.38毫克/100克,而2两猪通脊肉中是2.20毫克,2两猪肝中是5.78毫克。海鲜贝壳类食品含量更高,比如2两 牡蛎肉含锌9.39毫克,2两鲜扇贝含有11.69毫克。
  中国人食盐量本来就高,靠吃盐补充这些微量元素并不科学,反而可能增加食盐的摄入量,容易导致高血压等 慢性病。是否缺乏营养素应该到医院就诊,只有明确营养缺乏病的人群才需要补充。如果缺锌了,也应该主要从食 物中补充,加锌营养盐只是厂家利用营养概念进行的商业宣传。
  大多数营养盐都“不咸”
  记者调查:健康时报读者赵女士对记者说,尝试不同的营养盐的结果是,做了几十年饭的自己现在炒菜时的咸 度总也把握不好,不是咸就是淡。比如说竹盐比起核黄素盐来要淡得多,炒菜时必须多放几勺。记者调查发现,只 有20%的食盐包装上附有氯化钠或所加营养元素的成分表,80%的食盐产品并未标明成分含量。
  专家点评:盐的咸味来自主要成分氯化钠。在《食用盐的国家标准》中,碘盐氯化钠的含量有三个级别,一级 含量≥99.1,二级≥98.5,三级≥97。《预包装食品标签通则》也规定,包装上必须写有食用盐成分含 量,但是很多企业却没有执行这项标准,这给人们把握咸度带来困难。
  大多数营养盐的咸味会比普通食盐低,因为加了其他微量元素后,钠离子的含量相对降低了。从健康方面考虑 ,建议消费者食用低钠盐,因为低钠盐里只含有60%~70%的氯化钠,同时还有20%~30%的氯化钾和8 %~12%的硫酸镁。而氯化钾是咸的,这样一来,低钠盐的咸味儿和普通精制盐的咸味儿相差无几。况且中国人 吃盐的量本身就已经很高,如果人们食用低钠盐,不但把每天摄取钠离子的量大大降低了,还解决了人体中钠离子 和钾离子平衡的问题。能起到预防高血压、保护心脑血管的作用。
  营养盐应该标注适宜人群
  记者调查:一位女士拿起一袋加锌的盐对丈夫说:“还没吃过加锌的盐呢,买一袋吧。”自从市场上出现添加 各种微量元素的营养盐后,这样的消费者就不在少数了。多数生产企业都标注了所加营养成分或微量元素的含量, 但是并没有在包装上标注适宜人群。
  专家点评:消费者应当首先明确自己是否需要补充微量元素?其次,明确如何补充?最后,从食品标签中得到 明确的信息,这种食品能够补充多少?理性地选择是否购买这种食品?营养盐标注明确的营养成分和适宜人群是厂 家对消费者负责的基本态度。
  比如,生长发育期的儿童、妊娠和哺乳期妇女、重体力劳动和精神紧张者以及一些代谢增高性疾病(如甲亢、 长期低烧、外科手术感染者等)相对容易缺乏核黄素,盟特,即维生素B2,最明显的症状是口腔溃疡和口角炎。但是从治疗上,应该在医生指导下服用相关药物,日常膳食 中增加富含核黄素的食物,仅仅从核黄素营养盐中摄取是不可能纠正的,健尔马足疗机
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Old 07-28-2011, 02:18 AM   #2
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Old 07-28-2011, 02:29 AM   #3
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Old 07-28-2011, 04:09 AM   #4
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