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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The default setting will overlay each scan on the spectrum visual display. Watson and Crick built upon his manjal in their determination of the structure of DNA.

Beckman was able to obtain small batches of an experimental phototube from RCA for the first Model D instruments. Read more about the condition. All pictures shown above are of actual product s sold. The Model B’s rotary cell compartment was replaced with a linear sample chamber. Atomic spectroscopy 2nd ed. The spectrum is directed back to the collimating mirror which centers the chosen wavelength on the exit slit and sample. Replied to gr’s post on October 2 nd This work became one of the most cited papers in biochemistry.

The specrophotometer icon will be blinking red and yellow.

DU spectrophotometer

If you get a bogus absorbance reading, make sure the stage is in the correct orientation. Remove your samples from the area when you have finished using the machine. Interest will be charged to your account from the purchase date if the balance is not paid in full within 6 months. Ultraviolet spectroscopy has wide applicability in molecular biologyparticularly the study of photosynthesis.

After Beckman went electronic back in the late 90’s, very little changes were ever made to the paper copies unless a new run of manuals needed to be made for training purposes and NONE of the service manuals EVER included service updates of any kind so you’re still missing out on the most important information that was released about the product. From untilwhen it was discontinued, the Model DU spectrophotometer was built upon what was essentially the same design. You are covered by the eBay Money Back Guarantee if you receive an item that is not as described in the listing.


Spectroscopic techniques were rarely taught in chemistry classes and were unfamiliar to most practicing chemists. I determine which shipping company ships the merchandise by cost and location, only if customer request otherwise. You must give the file an unique name.

This amount is subject to change until you make payment. Links on landing page go to full documents. Biological molecules, including proteins and nucleic acidsabsorb light energy in both the ultraviolet and visible range.

At Northern Regional Research Laboratory in Peoria, Illinoisresearchers collected and examined more than 2, specimens of molds as well as other microorganisms. Principles, Methods, and General Applications.

Spectrophotometer, DU – OpenWetWare

In it, Cary and Beckman compared designs for a modified self-collimating quartz Fery prism, a mirror-collimated quartz Littrow prismand various gratings. A prism could be used to separate a light source into specific wavelengths. The DU Series operates in the wavelength range of to nm.

Infrared spectrophotometers were better suited than UV—Vis spectrophotometers to the analysis of C 4 becknanparticularly for applications in petroleum refining and gasoline production. Ultimately, the accuracy of such approaches was dependent on accurate, consistent spectrophotomefer of the photographic plates, and on human visual acuity and practice in reading the wavelengths.

This makes possible the quantitative determination of the amount of a substance in solution.


Equipment Information

If so, do not bid on this item unless you are an authorized purchaser. Science in the twentieth century. We sell both new and used items. Add to watch list. In Bishop, Michael L.

DU Date Transfer Procedure

Archived from the original on February 4, The machine should warm up for a half-hour before use after being re-booted. Kayewho developed it by modifying the DU to expand its range into the near-infrared. Retrieved 1 September Spectrophotometee advertisement indicates that three types of phototubes were available, with maximum sensitivity to red, blue and ultraviolet light ranges.

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.

Vital forces beciman discovery of the molecular basis of life.

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There is a shipping surcharge to items shipped to Alaska, Hawaii and Puerto Rico. I strive to earn a 5 star feedback from you. They made several discoveries critical to understanding carbohydrate metabolismincluding the isolation and discovery of the Cori esterglucose 1-phosphateand the understanding of the Cori cycle. Large, high optical quality quartz suitable for creating prisms was difficult to obtain. Kornberg used it to purify aconitasean enzyme in the citric acid cycle.