] lu'an melon seed tea was first recorded in the classic of tea . [ ] the classic of tea was the first book about general tea knowledge, and contained a brief introduction about tea categories and how to prepare tea. it was written by lu yu ( – ce) during the tang dynasty ( – ce). in contrast to the...
marketing solutions justia patents hazardous or toxic waste destruction or containment patents (class ) hazardous or toxic waste destruction or containment patents (class ) destruction or containment of radioactive waste (class / ) by fixation in stable solid media (class / ) surrounding with specified...
are therefore extremely resistant to scratching. synthetic versions are used in optical devices such as spectroscopes and lasers, shatter resistant windows, and as insulating substrates for silicon integrated circuits. powdered forms of aluminum oxide are used as filler in plastics, as it is both white...