Breathalyser tests are used by the police to estimate the concentration of alcohol in the blood by testing alcohol levels in the breath. This is...
Breathalyser tests are used by the police to estimate the concentration of alcohol in the blood by testing alcohol levels in the breath. This is...
Breathalyser tests are used by the police to estimate the concentration of alcohol in the blood by testing alcohol levels in the breath. This is...
Lithograph by Julien Leopold Boilly of the French chemist Nicolas Louis Vauquelin . Vauquelin discovered Potassium dichromate in 1797 during the...
Breathalyser tests are used by the police to estimate the concentration of alcohol in the blood by testing alcohol levels in the breath. This is...
This mass of red crystals was prepared in the early 1920s by Burroughs Wellcome . Potassium dichromate is used extensively in chemistry and in the...
Alphonse Louis Poitevin french chemist obtains license to print using the technique of potassium dichromate giving birth photolithography and etching...
Former West Virginia Army National Guard Staff Sergeant Russell Powell, former Oregon Army National Guard Staff Sergeant Rocky Bixby, former Army...
Senate Majority Leader Sen. Harry Reid , Sen. John Rockefeller , Sen. Byron Dorgan , and Sen. Evan Bayh listen during a hearing before the Senate...
Former Oregon Army National Guard Staff Sergeant Rocky Bixby pauses as he testifies during a hearing before the Senate Democratic Policy Committee on...
Former Oregon Army National Guard Staff Sergeant Rocky Bixby coughs as he testifies during a hearing before the Senate Democratic Policy Committee on...
Former West Virginia Army National Guard Staff Sergeant Russell Powell, former Oregon Army National Guard Staff Sergeant Rocky Bixby, former Indiana...
Former Associate Director for Health of the National Center for Environmental Assessment Herman Gibb speaks during a hearing before the Senate...
Former Oregon Army National Guard Staff Sergeant Rocky Bixby coughes as he testifies during a hearing before the Senate Democratic Policy Committee...
Sen. John Rockefeller , Sen. Byron Dorgan , and Sen. Evan Bayh listen during a hearing before the Senate Democratic Policy Committee on Capitol Hill...
volumetric flask containing a solution of potassium dichromate(vi) (k2cr2o7), surrounded by various flasks with transition metal salts, dry chemicals and solutions - dichromate 個照片及圖片檔
volumetric flask containing solution of potassium dichromate (vi) (k2cr2o7) and other flasks of transition metal salts, dry chemicals and solutions. compounds with transition metals are often colored - dichromate 個照片及圖片檔
An advert for the Collotype process offered by The London Stereoscopic Company, 1903. Collotype is a dichromate-based photographic process which was...
