Search results
Results From The WOW.Com Content Network
Nitrophenyl pentadienal, nitrophenylpentadienal, NPPD, or METKA (Russian for "mark") colloquially known as "spy dust", [1] is a chemical compound used as a tagging agent by the KGB during the Cold War Soviet Era. Soviet authorities in Moscow tracked
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
[[Category:Chemical compound symbol templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Chemical compound symbol templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
Collodion reduced the exposure time necessary for making an image. This method became known as the 'wet-plate collodion' or 'wet collodion' method. Collodion was relatively grainless and colorless, and allowed for one of the first high-quality duplication processes, also known as negatives .
Tungsten hexacarbonyl (also called tungsten carbonyl) is an organometallic compound with the formula W(CO) 6. This complex gave rise to the first example of a dihydrogen complex. [2] Like its chromium and molybdenum analogs, this colorless compound is noteworthy as a volatile, air-stable derivative of tungsten in its zero oxidation state.
Hexamethyltungsten is the chemical compound W(CH 3) 6 also written WMe 6.Classified as a transition metal alkyl complex, hexamethyltungsten is an air-sensitive, red, crystalline solid at room temperature; however, it is extremely volatile and sublimes at −30 °C.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
1867. Collodion wet plate process. GERONA.-Puente de Isabel II.Ministry of Education, Culture and Sport (Spain). The collodion process is an early photographic process. The collodion process, mostly synonymous with the "collodion wet plate process", requires the photographic material to be coated, sensitized, exposed, and developed within the span of about fifteen minutes, necessitating a ...