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2019年08月19日 18:12:33来源:39新闻

  • 女性多吃豆类 男性多吃鱼Women who ate soy regularly as children have a lower risk of breast cancer, American researchers report. And men who eat fish several times a week have a lower risk of colon cancer, a second team of researchers have told the American Association for Cancer Research.The studies add to a growing body of evidence about the role of diet in cancer.Cancer experts now believe that up to two-thirds of all cancers come from lifestyle factors such as smoking, diet and lack of exercise.The US National Cancer Institute and researchers at the University of Hawaii found that women who ate the most soy-based foods, such as tofu and miso, when aged 5 to 11, reduced their risk of developing breast cancer by 58 per cent. It was not clear how soy might prevent cancer, though compounds in soy called isoflavones have estrogen-like effects.A second study showed that men who ate fish at least five times a week had a 40 per cent lower risk of developing colorectal cancer compared with men who ate fish less than once a week.Many kinds of fish are rich in omega-3 fatty acids, which interfere with the cyclooxygenase-2 or COX-2 enzyme. COX-2 affects inflammation, which may play a role in tumour growth. 据美国研究人员报告,儿童时期经常吃豆类食品的女性患乳腺癌的风险较小。另一组研究人员则向美国癌症研究协会提出,一周吃几次鱼的男性患结肠癌的几率较小。这两项研究进一步明了饮食对于防癌的作用。癌症防治专家认为,在所有种类的癌症中,多达三分之二都是由吸烟、节食及缺乏锻炼等不健康的生活方式造成的。美国全国癌症研究所和夏威夷大学的研究人员发现,在5岁至11岁时经常吃豆腐、味噌等豆类食品的女性患乳腺癌的几率要低58%。至于豆类食品为什么可以防癌还不清楚,不过大豆中所含的名叫异黄酮的化合物具有雌性激素的作用。另一项研究表明,一周吃鱼至少五次的男性患结肠癌的风险要比那些一周都吃不到一次鱼的男性低40%。很多鱼类中所富含的Omega-3脂肪酸能够抑制环氧化酶2的活性。环氧化酶2会引起发炎,这可能会刺激肿瘤的生长。 /200803/32263。
  • The State Council has issued a plan on transforming Beijing into a national scientific and technological innovation hub.国务院近日发布了一份将北京转变成为全国科技创新中心的方案。According to the document, China aims to make the hub a world leader in innovation, a growth pole for the economy, and a pool for talent.根据该方案,我国计划使该中心成为全球创新引领者、经济增长极和人才库。The innovation hub is expected to become a powerful engine to boost the country#39;s innovation drive by 2030, the plan said.方案提出,到2030年,全国科技创新中心将成为提升我国创新驱动力的强大引擎。The document stresses the key role of north Beijing#39;s hi-tech zone Zhongguancun and neighboring regions of Tianjin Municipality and Hebei Province in supporting the technology innovation hub drive.该方案强调了北京高新技术开发区中关村的关键作用,以及天津市和河北省的邻近地区持科技创新中心的驱动力。It also called for enhanced fundamental research in cutting-edge technology, improved personnel training and government services as well as a better policy environment for innovation.该方案提倡加强对尖端技术的基础研究、改善人员培训、政府务以及创新政策环境。Technological innovation in pivotal sectors should be strengthened and should benefit more people, and the capital city should become more open to international resources, it added.此外,该方案还称,应加强关键领域的技术创新,使更多人受益,北京应对国际资源更加开放。 /201609/468185。
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