人体微量元素平衡与健康饮食

综述了人体微量元素平衡与健康饮食的关系。微量元素参与机体内的各种代谢,在维持人的生命活动中发挥着重要的作用。正确理解微量元素的生理功能,树立科学的平衡营养观,是引导人们自觉地实现多样化饮食、促进健康长寿的关键。     

人体健康与营养平衡

介绍了人体健康与营养平衡的关系和如何做到营养平衡。指出只有保持营养平衡，才能保证健康长寿。     

开发中国营养平衡米提高老人健康水平

介绍了广州老人进食中国营养平衡米(下称平衡米)的效果.营养调查发现,180例广州老人Ca、P、Fe、Zn和Se摄入量分别为403、807、17、14 mg和46 μg,说明老人Ca、Zn、Se不足.原因是主食籼米矿物质营养不平衡.建议进食营养平衡米后,老人Ca、P、Fe、Zn 和 Se 摄入量分别提高到1 153、863、45、45 mg和111 μg,结果表明,进食平衡米可以提高广州老人矿物质营养水平,致使老人健康长寿.对此,建议开发和推广食用中国营养平衡米.     

中国色谱学研究基地的奠基人--热烈祝贺我国著名化学家卢佩章院士八秩华诞

2005年10月7日是本刊顾问、我国著名化学家,中国色谱的开创者之一卢佩章院士八秩华诞的喜庆日子,在此,我们向这位深受人们崇敬的卢院士表示最热烈的祝贺,祝卢院士健康长寿、阖家团聚。     

广州老人进食中国营养平衡米的营养调查

介绍了广州老人进食中国营养平衡米（简称平衡米）的效果。营养调查发现，广州老人Ca,P,Fe,Zn和Se摄入量分别为403，807，17，14mg/d/人和46μg/d/人，说明老人Ca,Zn,Se不足，原因是主食籼米矿物质营养不平衡，进食平衡米后。老人Ca,P,Fe,Zn和Se摄入量分别提高到1153，863，45，45mg/d/人和111μg/d/人。结果说明，进食平衡米可以提高广州老人矿物质营养水平，使老人健康长寿。     

吃得好不一定能长寿

很多人都把能吃能喝作为健康长寿的条件，认为吃得越好就越长寿，越健康，越聪明。孝敬老人或者大摆宴席．无不挑“营养”的东西买，挑贵重的东西送。以为越高级，越珍稀、越出名、越“补”，越能给您带来健康，这是对健康的误解．翻开中国儿千年的历史．在历代封建王朝中，请问有哪一位皇帝吃得不好？!山珍海昧……无所不有，可以说他们吃尽人间精华。但是，到头来真正健康长寿的皇帝寥寥无儿。就拿近代来说，也有不少人生活条件很好，正当青春年华事业有成时候，却偏偏得了不治之症，过早地离开人世，这不能不令人反思。     

微量元素与防病治病

介绍了微量元素在防治疾病中的作用及对健康长寿的意义，涉及人体必需微量元素，有害元素，有机锗，微量元素是健康长寿的重要手段以及微量元素与现代文明病。     

微量元素与眼保健

眼睛是人们与外界接触的最重要器官之一，也是人们极为珍惜和小心保护的。但近年来的统计表明，尽管人们在住房、学习和工作环境都大有改善的今天，青少年甚至成年人的近视发病率却一直居高不下，这除了与用眼时间过长有关外，与营养及内分泌失调的关系也很重要。同样，老年人白内障的发病率一直无法降低，甚至有上升趋势，这也与微量元素营养不足有密切关系。     

美丽俏佳人之花青素篇

在当今社会，随着消费的升级，美容和减肥逐渐成为一种全民的时尚潮流，不仅如此，人们更加追求一种健康的抗衰老和保持身材的方式。于是，花青素出现在千家万户的视野中，享有“皮肤维生素”的花青素为大家带来了福音，帮助身体消除自由基的同时，又有很多保健作用。本文用拟人化的手法，从花青素的结构开始分析，生动形象地揭秘了花青素还原美貌的神奇功效，并科学地解释了花青素抗氧化和帮助减肥的机理，无疑是人如其名的天然营养补充剂。     

胆固醇作用的一种新评价

长期以来人们普遍认为胆固醇是导致患动脉粥状硬化和冠状心脏病的重要因素之一。以美国农业部人类营养办事处的Hegsted为代表到最近还一直认为,关于降低饮食中饱和脂肪和胆固醇含量的建议是有科学根据的。而美国国家研究委员会食品和营养局则认为:“对健康的成年人来说,需要吃     

HEPT类化合物的QSAR研究

为定量结构／活性相关性研究提取了量子化学参数,拓扑指数Am,分子连接性指数^mxt及疏水性常数,同时应用正交变换和最佳变量子集算法（Leaps-and-Bonds)进行了变量压缩和选择,进而实施了多元回归分析,并由此结果进行了HEPT类化合物（1－[(2-hydroxyethoxy)methyl]-6-(phenylthio)-thymine derivatives)的结构／活性关系的理论解释,进行了人工神经网络法对于该类化合物的活性预测,其结构明显好于多元回归法。     

Effect of the pH of the medium on the chemical shifts in the PMR spectra and on the distribution of the π-electron density

The dependence of the chemical shifts of the ring protons on the pH of the medium for a number of 4-hydroxyquinoline derivatives was studied by means of PMR spectroscopy. The dipolar and uncharged hydroxy forms exist in equilibrium in aqueous solutions. The effect of intramolecular hydrogen bonding on the character of the dependence of the chemical shift on the pH of the medium in the case of 3-piperidinomethyl-4-hydroxyisoquinoline was investigated. The possibility of the separate protonation of the ring nitrogen and the side-chain nitrogen in 3-piperidinomethyl-4-hydroxyisoquinoline was established. The distribution of the -electron density in 4-hydroxyisoquinoline is in good agreement with its chemical behavior.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1546–1549, November, 1971     

Effect of the pH of the medium on the chemical shifts in the PMR spectra and on the distribution of the π-electron density

The dependence of the chemical shift of the ring protons on the pH of the medium for a number of 3-hydroxyquinoline derivatives was studied by PMR spectroscopy. The regions of ionization of the molecules, which correspond to the ranges of acidic, neutral, and alkaline media, were found. In D₂O, 3-hydroxyquinoline is present only in the uncharged hydroxy form. The presence of intramolecular hydrogen bonding in 4-dimethylaminomethyl-3-hydroxyquinoline has a substantial effect on the character of the dependence of the chemical shift on the pH of the medium; the existence of separate protonation of the nitrogen atoms of the ring and the side chain of 4-dimethylaminomethyl-3-hydroxyquinoline was established. The distribution of the -electron density in the 3-hydroxyquinoline molecule is in good agreement with its chemical behavior during electrophilic substitution.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1540–1545, November, 1971.     

液滴荧光传感与计算机联用技术在微量分析中的应用

通过在LS55型荧光-磷光-发光分光光度计上加装液滴产生及调节附件,采用计算机采集与分析处理数据,成功地研制了双通道液滴光化学传感装置.利用葡聚糖凝胶对复合维生素B中不同组分的选择性吸附来达到分离与同时检测的目的,并将其用于复合维生素B药片的分析,取得了满意的结果.     

On the theory underlying the Car-Parrinello method and the role of the fictitious mass parameter

The theory underlying the Car-Parrinello extended-Lagrangian approach to ab initio molecular dynamics (CPMD) is reviewed and reexamined using "heavy" ice as a test system. It is emphasized that the adiabatic decoupling in CPMD is not a decoupling of electronic orbitals from the ions but only a decoupling of a subset of the orbital vibrational modes from the rest of the necessarily coupled system of orbitals and ions. Recent work [J. Chem. Phys. 116, 14 (2002)] has pointed out that, due to the orbital-ion coupling that remains once adiabatic decoupling has been achieved, a large value of the fictitious mass mu can lead to systematic errors in the computed forces in CPMD. These errors are further investigated in the present work with a focus on those parts of these errors that are not corrected simply by rescaling the masses of the ions. It is suggested that any comparison of the efficiencies of Born-Oppenheimer molecular dynamics (BOMD) and CPMD should be performed at a similar level of accuracy. If accuracy is judged according to the average magnitude of the systematic errors in the computed forces, the efficiency of BOMD compares more favorably to that of CPMD than previous comparisons have suggested.