Description: The DU Series Spectrophotometer is a microprocessor- controlled spectrophotometer intended for use in quantitative and qualitative biological. The Beckman DU Spectrophotometer is an efficient stand alone system that comes with complementary accessories to produce accurate results. Beckman DU UV/Vis Scanning Spectrophotometer. This refurbished DU Spectrophotometer unit; PDF Manual; Mouse; Power cord.
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Beckman DU The DU Series is a microprocessor controlled spectrophotometer intended for use in quantitative and qualitative biological research and industrial procedures that require spectrophotomic measurements in the UV-visible region of the electromagnetic spectrum.
Retrieved 15 December As described in Julythe Beckman spectrophotomter could use a “hot cathode hydrogen discharge tube” or a tungsten light source interchangeably. Combined Shipping discount is available, which is based on number of items purchased and shipping weight. If so, do not bid on this item unless you are an authorized purchaser.
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Watson and Crick built upon his ideas in their determination of the structure of DNA. The DU Series operates in the wavelength range of to nm.
Determining quantitative concentrations of those components in the sample involved further steps. The Model D was the first model to enter actual production.
The entrance mirror deflects the light through the entrance slit and into the monochromator to the collimating mirror. When RCA could not meet Beckman’s demand for experimental phototubes, National Technical Laboratories again had to design its own components in-house. Spextrophotometer contrast, examining a food sample with a DU spectrophotometer yielded better results in a matter of minutes.
The spectrum is directed back to the collimating mirror which centers the chosen wavelength on the exit slit and sample. You comment and advice is very much appreciated. You must give the file an unique name. Learn More – opens in a new window or tab. Expedited Shipping is available if you need one.
Shining the light through a sample of a material would cause some wavelengths of light to be absorbed, while others would be unaffected and continue to be transmitted. Brock and Gerald E. Beckman DU Spectrophotometer Condition: National Museum of American History.
Interest will be charged to your account from the purchase date if the balance is not paid in full within 6 months. The current gain is amplified and beckmwn on the null meter.
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Beckman DU | Labx
An experienced human could compare these to the known images to identify a match. Combined Shipping discount is available, which is based of number of items purchased and shipping weight. Large, high optical quality quartz suitable for creating prisms was difficult to obtain.
Listing Type Buy Now 1. The tangent bar mechanism was replaced by a scroll drive mechanism, : The sample holder held up to 4 cells. By the sppectrophotometer, both academic and industrial chemists were becoming increasingly interested in problems involving the composition and detection of biological molecules.
See terms – opens in a new window or tab. Rather than depending on development of photographic plates, or a human observer’s visual ability to detect wavelengths in the absorption spectrum, phototubes would be used to register and report the specific wavelengths that were detected. The measurement of appearance 2nd ed.
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Retrieved from ” https: Another researcher who spent six months in at the Cori laboratory, “the most vibrant place in biochemistry” at that time, was Arthur Kornberg.
Beckman DU UV/VIS/NIR Spectrophotometer
All pictures shown above are of actual product s sold. The user could also switch between phototubes without removing the sample holder. I reserve the right to reject item after inspection i. Isolation and purification of hormones. From Wikipedia, the free encyclopedia. This amount is subject to change until you make payment.
Replied to gr’s post on October 2 nd The last DU spectrophotometer was produced on July 6, Learn more – opens in new window or tab. It had a moving chart recorder to plot results, with red, green and black dots.
The DR incorporated a “robot operator” which would reset the knobs on the DU to complete a sequence of measurements at different wavelengths, just like a human operator would to generate results for a full spectrum.
Replied to gr’s post on August 29 th The Model B’s rotary cell compartment was replaced with a linear sample chamber.