镁

In ophiolitic formation thereare a minerogenetic series of nometallic mineral deposits which are closely related to eachother in genesis, time and space.

蛇绿岩是一套镁铁质到超镁铁质的特定岩石组合，其中有着成因上和时空上紧密联系的一系列非金属矿床。

A white solid mineral that occurs naturally as periclase; a source of magnesium .

一种白色固体矿物，天然生成的方镁石，是镁的来源。

The main products are: series and high aluminum phosphate, clay, acid-resistant, wear-resistant series, periclase, spinel series; magnesium branded series, lightweight insulation series, and a variety of on line monolithic castables, ramming play materials and the production and supply of raw materials.

主要产品有：磷酸盐系列及高铝，粘土，耐酸，耐磨系列，方镁石，尖晶石系列；镁烙系列，轻质保温系列，及多种上不定形系耐火浇注料，捣打料及各原材料的生产和供应。

It was identified by X-ray powder pattern and by microscopic ob-servation that the periclase grains or/and needles occur in the slagged zone ofbricks.

MgO来源于补炉镁砂和镁质炉墙在高温下的冲蚀和挥发，X射线和显微镜分析证实渣蚀带一些区域内存在粒状和针状方镁石晶体。

The dust around PG 2112+059 contains large quantities of rock-forming minerals, including crystalline forms of silica, a form of aluminium oxide called corundum (better known on Earth as the principal ingredient of rubies and sapphires) and a form of magnesium oxide called periclase.

PG 2112+059类星体周围的尘埃含有大量形成岩石的矿物，包括硅晶石，被称作刚玉的铝氧化物（更为通俗易懂的说法是红宝石和蓝宝石的主要成分），以及镁氧化物——方镁石。

This and previous studies have shown that pheophytin absorption peaks appears at 412 nm in the violet region of spectrum, and 670 nm in the red.

由实测数据及相关文献推断出脱镁叶绿素蓝光和红光吸收峰分别位于412和670nm波段，并采用多元线性回归对脱镁叶绿素和叶绿素a的比吸收系数进行研究。

Accordingly, the Q bands of them blue shifted by 6mn and 13nm, respectively. The fluorescence emission wavelengths of Cd-pheophytin a and Cd-pheophytin b observed at 660nm and 649nm, respectively, which were shorter than those of corresponding pheophytin a and pheophytin b by 10nm and 9nm, respectively.

研究发现：在光吸收性质上，与脱镁叶绿素a和b相比，镉叶绿素a和b在Soret带的吸收峰位置分别红移了19nm和11nm，而在Q带则分别蓝移了6nm和13nm；在荧光性质上，镉叶绿素a和b的荧光发射波长比脱镁叶绿素a和b分别蓝移了10nm和9nm。

While the proportion of pheophytin in total pigment concentration increased, the absorption peak in the blue region of spectrum deviated from 440 nm to near 412 nm. The absorption peak height in the blue region was mainly influenced by pheophytin concentration, whereas the height in the red was decided more by chlorophyll a concentration.

随脱镁叶绿素占色素总浓度比例的增大，浮游植物吸收曲线上蓝光吸收峰偏离440nm波段，逐渐向412nm波段靠近，并得到蓝光波段吸收峰的高度由脱镁叶绿素浓度决定，而红光波段吸收峰的高度由叶绿素a浓度决定。

The excitation and fluorescence spectra were taken with leaves and the relevant molecule samples prepared in thelaboratory,including Chla,pheophytin Aand pheophorbide A.

为此我们从海带里提取Chla，然后采用分子修饰的方法对Chla分子进行一步步修饰分别生成脱镁叶绿素A和脱镁叶绿素甲酯一酸A。

The absorption bands observed for Pb-pheophytin a at 462nm and 673nm , while for Pb-pheophytin b at 480nm and 662nm . Compared with pheophytin a and pheophytin b, all these bands red shifted more or less. Among the reported metallochlorophylls, the degree of red shift of Pb-pheophytin in Soret band was the largest by 54nm and 44nm for Pb-pheophytin a and Pb-pheophytin b, respectively.

实验表明：对铅叶绿素a和b系列来说，它们在Soret带、Q带的特征吸收峰分别在462nm，673nm和480nm，662nm；与脱镁叶绿素a，b相比，铅叶绿素a，b在Soret带和Q带吸收峰均有不同程度的红移；与现已报道的金属叶绿素相比，铅叶绿素a，b在Soret带的红移程度最大，分别为54和44nm；铅叶绿素不具有荧光活性，并能猝灭脱镁叶绿素的荧光。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。