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线索词为教授所说:Phytoliths are very tiny,mineral deposits,almost like pieces of hard glass,that form in the cells or between cells of many kinds of plants.The minerals originate in the ground water that the plant absorbs through its roots.如原文所述,植物岩为沉积在细胞中或细胞间的矿物质,...
During the 20th century, cheap, lightweight, reliably made plastics became widely available and most low-cost optical devices now use plastic lenses (sometimes known as "organic glass"—made from materials such as polycarbonate) in place of glass ones (sometimes known as "mineral glass" to diffe...
It is an amorphous silica with a chemical composition of SiO2.nH2O. It has a conchoidal fracture that is characteristic of an amorphous glass. Precious Opal is a mineraloid. The play-of-color in opal is produced when light travels through a three-dimensional array of tiny silica spheres ...
Venetian breezes wash over the hills, kissing the grapes with a mineral freshness before they blow up to the Alps. The hills are so dramatic that in 2009, UNESCO World Heritage designated the hills of Conegliano and Valdobbiadene a World Heritage site. “Our Prosecco is agriculture,” says ...
While getting osteoporosis is never anyone’s fault, there are some lifestyle changes worth making that could influence whether you develop the condition down the road. Diet Diet Bone is mostly made of calcium, which means this mineral is vital for building healthy bone early on. Calcium is ...
Petrogenetic modeling of volcanic rocks often involves assessment of the trace element budgets of mineral and glass phases. Laser ablation inductively coupled plasma source mass spectrometry (LA-ICPMS) offers the ability to quantitatively analyze trace element concentrations in situ for samples of 10to ...
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The exposed membrane frequently has granular mineral aggregate to withstand the wear and tear of this weathering and the other types of membrane. The contractor needs to apply one protective screed to prevent the puncture of the membrane.Also, read: What Is Plaster | Plaster Ratio | History of...
Sand is melted at high temperatures to make glass products. 2 Salt Used in food preservation. Salt has been used to cure meats and pickle vegetables for centuries. 2 Sand Sand is a granular material composed of finely divided rock and mineral particles. Sand has various compositions but is de...