Under UV light, clean sand appears purple or black. Some minerals, such as calcium carbonate in seashells, glow blue, as does a shovel handle in the picture above.
紫外线照射下，干净的沙子呈紫色或黑色。有些矿物，如海贝中的碳酸钙，会闪着蓝光，就如同上图中的铁锹的把手。
They would leave subtle clues in the isotopic composition of the limestone by shifting the ratios of light to heavy carbon and oxygen atoms in its calcium carbonate.
因为如果是那样的话，阳光将会被转换成大量的碳、氧原子保存到石灰岩中的碳酸钙里，而事实却是，岩层的同位素组成（Isotopic composition）中没有留下任何蛛丝马迹。
Coccolithophores are microorganisms that are covered in plate-like shells made out of calcium carbonate (chalk). The chalky shells reflect light, turning the ocean a milky turquoise color.
石灰质鞭毛虫(coccolithophores)是一类覆盖在碳酸钙(粉笔的主要成分)岩石板状外壳上的微生物。
Methods and ResultsAt first, we tested calcium carbonate whisker, nanometer calcium carbonate and PLLA by light microscope, scanning electron microscope and transmission electron microscope.
实验方法与结果首先对纳米碳酸钙和晶须碳酸钙及聚l -乳酸(PLLA)进行光镜、扫描电镜、透射电镜的检测。
As much the cascades of calcium carbonate as the water change color in accordance with changes of the solar light that illuminates them, and the effect is surprising.
无论是碳酸钙阶梯还是池中的水，它们的颜色都随照射的日光的颜色变化而变化，景象十分惊人。
The results show that this method is suited to character activated light calcium carbonate and activated heavy calcium carbonate which particle is very fine.
结果表明，该方法适于表征活性轻质碳酸钙和颗粒极细的活性重质碳酸钙。
Light calcium carbonate was usually manufactured by chemical process, so its high alkalinity could not be avoided easily.
由于轻质碳酸钙都是化学法生产，碱度高不易避免，而且轻质碳酸钙的生产原料质量直接影响其碱度。
Based on the theory of sonochemistry, the influence of ultrasound on the carbonation process of the synthesis of nanometer light calcium carbonate is studied initiatively.
根据声化学的有关原理初步探索了超声场对于纳米级轻质碳酸钙合成碳化过程的影响。
Both of the coarse and fine light-weight aggregates in the concrete were natural calcium carbonate nucleations with loose and porous structure.
“混凝土”中的轻质粗、细集料是一种组织疏松、多孔的天然碳酸钙结核。
Through adding a special crystal-growing controlling agent, a light rhombic shaped calcium carbonate is produced to be used for paper filling and colouring.
通过加入特定的晶形控制剂，制得了适合造纸填料及颜料使用的菱形轻质碳酸钙。
The effects of the contents of activated light calcium carbonate, PE wax and acrylic ester(ACR) on the surface gloss of plastics profile shapes were studied.
研究了活性轻质碳酸钙（活性钙）、聚乙烯蜡（PE蜡）、丙烯酸酯（ACR）用量对型材表面光亮度的影响。结果表明活性钙用量越多，型材表面光亮度越差；
The fluorine reducing agent is prepared from magnesium carbonate, light magnesium carbonate, hydroxyl calcium carbonic phosphate and animal bone through a definite technological process.
本发明是一种可以降低饮水氟含量的降氟剂，是由亲氟的化合物制成，主要原料有碳酸镁、轻质碳酸镁、羟基碳酸磷酸钙、动物骨等。
By using property of separating out water at high temperature for polyvinyl alcohol formaldehyde solution, kaolin and light calcium carbonate can be directly added, and technique is simplified.
在制备方法上利用聚乙烯醇缩甲醛溶液高温析水的性质，直接加入高岭土、轻质碳酸钙制胶，简化了工艺。
Dry powder granule raw materials which have special requirements to drying. for example: HP vesica nt lees light calcium carbonate active white earth magnetic powder graphite medical slag and so on.
对有特殊要求的粉状，颗粒状物料的干燥。如：h p发泡剂、酒糟渣、轻质碳酸钙、活性白土、磁粉、石墨、药渣。
For example: HP vesicant, lees, light calcium carbonate, active white earth, magnetic powder, graphite, medical slag and so on.
如：H P发泡剂、酒糟渣、轻质碳酸钙、活性白土、磁粉、石墨、药渣。
For example: HP vesicant, lees, light calcium carbonate, active white earth, magnetic powder, graphite, medical slag and so on.
如：H P发泡剂、酒糟渣、轻质碳酸钙、活性白土、磁粉、石墨、药渣。
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