Frederiksen
Cylindrical magnet with bearing
Cylindrical magnet with bearingPowerful magnet with coloured poles.
Dark Field Condenser, NeoZoom/60
Dark Field Condenser, NeoZoom/60Unit: Pcs
Decade resistor, 0 to 1 Mohm
Decade resistor, 0 to 1 MohmSturdy decade resistor with 7 decades.
Declination and inclination needle
Declination and inclination needleWith 105 mm long steel needle, fully rotatable.
Deflection of beta part. – Risø source
Deflection of beta part. – Risø sourceDemonstrate the deflection of beta particles using Risø’s beta source.*)
Diamagnetic floating graphite
Diamagnetic floating graphitePyrolytic carbon is the material with the highest diamagnetic susceptibility at room temperature.
Digital microscope, USB, 5 MP
Digital microscope, USB, 5 MPA neat little microscope with 5 MP resolution and stand. Easy to use for examining small details and surfaces, and includes adjustable built-in LED illumination. When mounted in the stand, allows a slightly larger working distance, and less magnification. When holding it over a surface, you can use the focusing wheel to ensure sharp images at two different magnifications. Supplied with Windows and Mac compatible software.
Discharge tube, Ø 13 x 100 mm
Discharge tube, Ø 13 x 100 mmNeon lamp Ignition voltage: 90 V Socket: festoon (large)
Distillation set, large
Distillation set, largeGlass construction kit for organic chemistry. The individual parts are with NS 19/26 and NS 24/29 grinding.
Distillation set, semi-micro
Distillation set, semi-microConstruction kit in glass for the construction of apparatus for distillation on a semi-micro scale. The individual parts are with normal grinding NS 14/23.
Distillation set, small
Distillation set, smallGlass construction kit for organic chemistry. The individual parts are with NS 14/23 grind.
DNA Model 50cm
DNA Model 50cmAssembled
As FR-527565, but with 12 base pairs:thymine (t), 6 adenine (A), 6 guanine (G) & 6 cytosine (C).
The side chains consist of dextroribose (red) and phosphate (purple), which can also be separated.
DNA model, 12 layers
DNA model, 12 layersThe model has 12 base pairs: 6 thymine (t), 6 adenine (A), 6 guanine (G) and 6 cytosine (C).
The side chains consist of dextroribose (red) and phosphate (purple), which can also be separated.
DNA model, 22 layers
DNA model, 22 layersThis DNA model makes it easier to study the double helix structure.
The model contains 22 base pairs consisting of:
12 thymine (T) (orange), 11 adenine (A) (blue), 11 guanine (G) (green),11 cytosine (C) (yellow).
DNA model, large, for hanging
DNA model, large, for hangingLarge, attractive DNA model, which can be mounted on a tripod pole or hung from the ceiling.
Shows DNA in double helix with 12 base pairs with correct bond angles
Double dipper
Double dipper
Dr FuelCell fuel cell car, basic
Dr FuelCell fuel cell car, basicThis fuel cell car set contains an electrolysis unit that is reversible and can thus both function as an electrolyzer that generates hydrogen, and which can subsequently function as a fuel cell that generates electricity to drive the electric motor in the car. Also included is a bottle of distilled water , a solar cell and a stopwatch, as well as a manual with various tasks.
