Vacuum pressure die casting of reactive metals - where telescopic vacuum chamber surrounds the two die halves (CS 30.11.78)The machine has a bed supporting two stationary end plates (a, b) joined by horizontal guide bars carrying a driven plate (c). Plate (c) carries a box-shaped die ...
A certain protest group on the internet that was anonymous in nature liked to say “None of us are as awful as all of us”. Truly, the disconnection from the real world has fueled this mean nature that comes part and parcel with the internet and the dealings online. Name calling, rudene...
Gold is a chemical element with the symbol Au and atomic number 79. It is a soft, yellow, precious metal that humans have highly valued for thousands of years. The origin of Gold is a topic of much scientific study and speculation. Moreover, there are several theories about how it formed...
Before diving headfirst into the shiny world of gold, silver, or any other precious metal, it’s vital to arm yourself with knowledge. Start by understanding the basics – how these metals are priced, their historical performance, and the factors that influence their value. Keep up-to-date...
Yet an analysis of publication trends suggests a significant decline in the application of δ30Si to Quaternary science questions in the last five years. At the same time as δ30Si proxy applications have decreased, we are learning more about its complexities: an expanding body of work is ...
The contrail below is at least 100 times as big as the plane that left it (the plane is just barely visible as a little grey dot ahead of the contrail). And this contrail is not even a persistent one. 4. Invisible Planes The smaller, higher and grayer a plane is, the harder it is...
Of these two I favor molten salt reactors because the salts are not reactive in air and thus do not start fires if you have a plumbing leak, unfortunately this IS a problem with sodium cooled reactors. The reason some designs favor sodium is that it is easier to find container materials ...
10. An apparatus for carrying out a continuously operated process for the purification by distillation of the 1,2-propylene glycol formed as by-product in the synthesis of propylene oxide with hydroperoxide and propylene, wherein the apparatus comprises at least one isothermal fixed-bed reactor and...
lie in great compressed heaps of phosphate rock below the world’s oceans and continents. Most of the world’s phosphate rock reserves (85 percent) are located in Morocco. Taken together, China and Morocco account for 91 percent of the world’s reserves, according to the International Fertilize...