蒋高明 有专家推荐了一篇转基因水稻营养成分发生变化的文章。文章发表在国际刊物《农业与食品化学杂志》上，题目是转基因的亚洲栽培稻籽粒发生非预期成分改变。 原文英文标题：Unintended compositional changes in transgenic rice seeds ( Oryza sativa L.) studied by spectral and chromatographic analysis coupled with chemometrics methods。 作者工作单位：School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China. 中山大学化学与化学工程学院 作者：Zhe Jiao; Xiao-xi Si; Gong-ke Li; Zhuo-min Zhang; Xin-ping Xu 期刊名称和期号：Journal of agricultural and food chemistry Volume: 58 ISSN: 1520-5118 ISO。发表日期：2010年2月 原文出处： http://www.biomedsearch.com/nih/Unintended-Compositional-Changes-in-Transgenic/20050687.html 英文摘要 Unintended compositional changes in transgenic rice seeds were studied by near-infrared reflectance, GC-MS, HPLC, and ICP-AES coupled with chemometrics strategies. Three kinds of transgenic rice with resistance to fungal diseases or insect pests were comparatively studied with the nontransgenic counterparts in terms of key nutrients such as protein, amino acids, fatty acids, vitamins, elements, and antinutrient phytic acid recommended by the Organization for Economic Co-operation and Development (OECD). The compositional profiles were discriminated by chemometrics methods, and the discriminatory compounds were protein, three amino acids, two fatty acids, two vitamins, and several elements. Significance of differences for these compounds was proved by analysis of variance, and the variation extent ranged from 20 to 74% for amino acids, from 19 to 38% for fatty acids, from 25 to 57% for vitamins, from 20 to 50% for elements, and 25% for protein, whereas phytic acid content did not change significantly. The unintended compositional alterations as well as unintended change of physical characteristic in transgenic rice compared with nontransgenic rice might be related to the genetic transformation, the effect of which needs to be elucidated by additional studies 英文摘要译文 用近红外反射法，气相色谱-质谱法、高效液相色谱法、电感耦合等离子体原子发射光谱法，并以化学计量法研究三种（分别）可抗霉菌病和抗虫的转基因水稻 中重要的营养物质成分组成（按欧共体标准），发现其营养成分组成和物理性状有非预期改变，其中蛋白质、三种氨基酸、两种脂肪酸、两种维生素及其他数种（微量）元素出现 了非预期的构成变化。差异幅度：氨基酸20-74%，脂肪酸19-38%，维生素25-57%，（微量）元素20-50%，蛋白质35%；植酸没有显著变化。相比于非转基因水稻，转基因水稻的营养 成分构成和物理性状的非预期改变，可能与基因的转入有关，阐明变化后的作用需要经过更多研究。 这项研究所用的上述几种方法，全都属于常规分析方法，不是专门检测转基因成分的高新技术，因此这项研究似乎不是针对转基因成分的。所以在研究中，外 源基因的表达、外源基因可能导致的未知物质的分析，都没有被涉及。仅仅做常规性分析，就可以发现，转基因水稻成分变化，相对于天然水稻来讲非常之大。 这是一项意义重大的发现，但是似乎没有人知道它。在网上搜索发现，这篇文章被引用过3次。这项研究是不是可以至少把实质上相同神话打破一次呢：转了基因之后，水稻主 要营养物质成分的差异程度可以达到19-70%这么大，这到底应该属于实质上相同，还是实质上不相同呢？
这两天加州的天气突然变得炎热起来 , 没有了往日的柔和和惬意 , 然而我的心情却愈加澄清和宁静 . 昨日参加了一个组织的活动 , 组织者是印度的 rakesh, 认识了一些新的朋友 , 香港的 Ming, 韩国的 Ho jeong 和埃及几及加拿大的 david, Ashley 等 . 他们非常热情 , 友好 , 真实的 nice person. 与他们一块交流是一件很好的事情 , 一方面可以 improve my English level, 另一方面，认识了New friends，他们的友好和热情让我感觉温暖和美好。 新的改变就要开始。 看到东平兄的博客，我也上了他的众友榜，先谢一个。 人与人贵在理解和安慰，质疑和愤怒只会带来伤害和痛苦。 是否我这段时间遇到不平的事情多而生气，还是我是一个真实的感情流露者？ 蓦然回首，才发现，是自己以前在一个压抑的环境里沉浸太久，不良情绪没得到有效释放，而今已是海阔天空，积累的能量终于得到释放。 我已经感受到了新的生活的开始。 昨日已是东流水，奔流到海不复回。 Yesterday is history Tomorrow is a mystery But today is a gift Rakesh said to me: Cast all your fears, anxiety, sins, sorrows and doubts unto him. Don't hide anything from Him. He can ease your burden and free you from your guilt. Have complete trust in Him. Do not look at the mountain. Have faith in the mountain-mover. He can do great things. Don't be discouraged by the challenges, difficulties or loses that you are going through currently. It's all a part of HIS's great plan. He will walk with us in times of trouble. He has a purpose for every one of us. Our life on earth is not to achieve our goal but to accomplish our role as part of His overall plan. Just remember that HE loves every one of us so much and comforts us that, Fear not, for I have redeemed you; I have summoned you by name; you are mine. I would love to share with you the lines from one of my favorite songs, Who am I ? Not because of who I am But because of what you've done. Not because of what I've done, But because of who you are.
标签: 改变
