Supplier: DIDALAB

These wide diameter lenses are used for easy classroom experiments and for aberrations underscoring.

Supplier: G-Biosciences

The Gram staining method was first described in 1844 by the Danish bacteriologist Hans Christian Gram, after whom the test was named. The Gram staining test for bacteria is one of the most important tests in microbiology and is often one of the first tests performed in the identification of bacteria. The Gram staining method utilises the properties of bacterial cell walls and the stain crystal violet. Gram-positive microorganisms have a higher peptidoglycan and lower lipid content than Gram-negative bacteria in their cell walls and this makes them capable of retaining the Gram stain. This kit is supplied with two strains of bacteria and all the necessary components to carry out the Gram staining.

Supplier: G-Biosciences

Antibiotics play a crucial role in the manipulation, screening and killing of bacteria in a range of biotechnology processes. This kit specifically teaches the basic principles of antibiotics, bacterial resistance and susceptibility. Students learn and understand the use of antibiotic resistance in screening for infectious diseases. Utilising a bacterial strain, students learn the effects of different antibiotics and visualise bacterial sensitivity and resistance to the supplied antibiotics. This method involves the use of filter paper discs impregnated with a specified concentration of antibiotics on the surface of an agar plate containing microbial cells. This kit will enable students to analyse the inhibitory effects of different antibiotics on selected bacterial cells and then determine which antibiotic is the most suitable to treat a bacterial infection.

Supplier: EDVOTEK

Educational Materials, Microbiology, Ansøgning: Microbiology

Supplier: DIDALAB

Educational Materials, Optics, Ansøgning: Physics, Diode laser, red, Class II

Supplier: DIDALAB

Prism made of standard optical glass with index near to 1,52. Equilateral dispersing prisms are used for wavelength separation applications. Intended for demonstration experiments of light dispersion.

Supplier: Aesculap

Educational Materials, Waves and Oscillations, Ansøgning: Physics, Tuning fork, 440 Hz (a¹)

Supplier: KVANT LIFE SCIENCE

The advantages of a diode laser compared to a HeNe laser are mainly small format, low power consumption and long service life, as well as the possibility of electronic modulation. The laser is modular in the range 100 Hz 20 MHz. Dimensions.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Motor with rotor that lacks iron and thereby has a very low moment of inertia, which in turn enables fast start and stop or change of direction of rotation. The time from start to maximum speed (3000 rpm) is only 11 ms. Can be used for experiments with mechanical oscillations. The motor is most conveniently operated with a function generator.

Supplier: KVANT LIFE SCIENCE

New optical models for laser optics (15 parts). Consists of.

Supplier: GLASWARENFABRIK KARL HECHT

According to Hoffmann, with two city dishes, 0 to 30 ml of grading graded 1/10 ml.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Franck-Hertz's experiment is one of the best ways to show the quantum properties of atoms. The experiment verifies the excitation energy of the Hg atoms through collisions with free electrons. Franck-Hertz tubes consist of an oxide cathode, gallery anode and a collection electrode. The evacuated tube contains a drop of Hg. Before starting the measurements, the pipe must be heated to 200 °C, partly to increase the pressure of the Hg steam and partly to obtain a sufficient probability of collision. When the temperature in the tube has become constant, the cathode is heated and a direct voltage which can be varied in the range 0 to 50 V is connected between the cathode and the anode. When the counter voltage is set to about -1,5 V and the anode voltage increases slowly from 0 V, the electrons will soon reach speeds in the acceleration range of the tube so that an increasing part of the primary current reaches the collector electrode. As the velocity of the electron flux approaches the lowest excitation level of the Hg atoms (4,9 eV), the electrons of the Hg atoms are capable of leaving the atoms and thus losing some of their velocity. The collector current drops to a minimum value. The Hg atom then emits its 253,7 nm ultraviolet line and then returns to its normal energy level. As the acceleration voltage increases further, the current reaching the collector electrode will increase again. This process is repeated periodically many times.

Supplier: KVANT LIFE SCIENCE

Equipment for laser sound transmission experiments. The included microphone, tape recorder or function generator is used as the sound source. The rate consists of.

Supplier: OSRAM

Equipment for demonstrating photoelectric power and determining Planck's constant. A photocell is equipped with filters that only transmit light of a certain wavelength. The photocell is illuminated with light from a Hg lamp. The potassium cathode then emits electrons that pass over to the unlit anode. Over time, a voltage arises that prevents new electrons from reaching the anode. The resulting voltage is measured with a measuring amplifier and a voltmeter. The measurement is repeated with filters for different wavelengths. Photocell and Hg lamp are equipped with magnets at the bottom for stable installation on the mounting plate. List of equipment:

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Cone-shaped pressure chamber speaker with high power resistance. Used for general acoustic tests, eg together with resonator 765-0080. Connects to a tone generator with amplifier. Melt protection prevents damage during overload. Technical data.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

Used e.g. to form homogeneous magnetic fields. Two identical coils placed in parallel by means of three fastening devices. The coils can be connected in series or in parallel. To determine e/m, the wire beam tube is placed between the Helmholtz coils in such a way that the visible beam is perpendicular to the homogeneous magnetic field. The generated magnetic field can be measured with a magnetic field meter with hall elements. Specifications.

Supplier: STOCKHOLMS ZOOLOGISKA

High quality workmanship reproduces well the physical characteristics of each species.

Supplier: ELWE LEHRGERAETEBAU KLINGENTHA

The exercise oscilloscope is placed at the Helmholtz coils so that its main axis coincides with the axis of the coils. A sawtooth-shaped voltage is applied to the deflection plates of the oscilloscope so that a smooth horizontal line appears on the screen. Let direct current pass through the coils at a preset anode voltage and adjust the intensity of the current so that the line is focused at one point. The specific charge e/m of the electron can be calculated from the measured values ​​of the anode voltage and the current through the coil.

Supplier: CORNELSEN EXPERIMENTA

Recipient with opening at the top. With the help of a rubber plug with electrical connection bushings, for example, a bell can be hung up in ordinary laboratory cables.

Supplier: 3B Scientific

Track with two trolleys and other accessories for investigating linear motion. The trolleys move with minimum friction on wheels with high-quality ball-bearings. They are fitted with magnets at their front ends for experiments involving both elastic and inelastic collisions.

Supplier: 3B Scientific

Voltameter, Electricity/Magnetism, Ansøgning: Elektricitet, Hofmann’s Voltameter, incl. gas collection tube, platinum electrodes, plastic hose with levelling bulb, stand ring, universal bosshead, stand baseplate with rod, dimensions ∼800×150 mm, rod Ø×H 12 mm×750 mm, retaining plate 120×110 mm

Supplier: PHYWE

Supplementary kit for table optics 765-1317. Content:

Supplier: CORNELSEN EXPERIMENTA

Educational Materials, Waves and Oscillations, Ansøgning: Physics, Club for the tambourine

Supplier: CORNELSEN EXPERIMENTA

For attaching an electric spinner to the ball generator's ball. Equipped with 4 mm banana plug.

Supplier: 3B Scientific

Over 30% of the world's population uses tobacco products, and 90% of that is from cigarettes. The physical effects of nicotine and the diseases it can cause, including cancer, are detailed on this anatomical poster. For such a wide spread practice education is important and this anatomy poster can help do that. This thickly laminated anatomical chart is printed on premium glossy (200 g) UV resistant paper and comes with two sided lamination (125 µm, 5,0 mil) and metal eyelets to make the chart easy to display.

Supplier: CORNELSEN EXPERIMENTA

Instrument for comparing charge amounts. When charging, a hand is repelled from the jumper it is hung in. Mounted on a plate.

Supplier: CORNELSEN EXPERIMENTA

Aluminum ring with suspension in three points. Used together with a dynamometer to determine the surface tension in liquids.

Supplier: CORNELSEN EXPERIMENTA

Simpler model of Magdeburger hemisphere. Equipped with folding hooks with which the air is evacuated.

Supplier: CORNELSEN EXPERIMENTA

Light plastic pendulum ball. Suitable for experiments with pressure waves with tambourine.

Supplier: 3B Scientific

Digital counter/timer for measuring duration of motion, transition times, periods, pendulum periods, frequencies, as well as for counting events or Geiger tube pulses. Includes a speaker that can be turned on and off and power supplies for direct connection to photo gate or a Geiger-Müller counter.