The leaf of a deciduous plant consists of several layers. Cells with many chloroplasts are found in the deeper layers. The external tissue layer, the epidermis, protects the plant against moisture loss due to evaporation. It does not contain any chloroplasts and the cells appear transparent when viewed under the microscope. Densely packed cells extending upwards and containing numerous chloroplasts are found in the palisade layer. Below, it is followed by the spongy parenchyma, under which lies another epidermis functioning as a boundary tissue.

Benefits

• Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
• With student worksheet, appropriate for all class levels
• With detailed instructor information, incl. sample microscopy image
• Optimized for tight schedules, i.e. minimum preparation time required
• Microscopy solution set specifically designed to include all required accessories
• Content available with matching multimedia files

The leaf of a deciduous plant consists of various layers. Deep within are cells containing many chloroplasts. The external tissue layer protects the plant against evaporation losses, however, it must also enable an exchange of substances with the ambient air. The leaf needs to take up carbon dioxide and release oxygen and water vapor. There are specialized guard cells in the lower epidermis which make this happen.

Benefits

• Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
• With student worksheet, appropriate for all class levels
• With detailed instructor information, incl. sample microscopy image
• Optimized for tight schedules, i.e. minimum preparation time required
• Microscopy solution set specifically designed to include all required accessories
• Content available with matching multimedia files

The leaf of a deciduous plant consists of several layers. Cells containing chloroplasts are found in deeper layers. The externally exposed tissue layer protects the plant against evaporation losses, however, it must also be transparent to light needed for photosynthesis in the deeper layers.

Benefits

• Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
• With student worksheet, appropriate for all class levels
• With detailed instructor information, incl. sample microscopy image
• Optimized for tight schedules, i.e. minimum preparation time required
• Microscopy solution set specifically designed to include all required accessories
• Content available with matching multimedia files

The cell is a reaction compartment in which many substances are synthesized and decomposed, hence where vital metabolic processes are taking place. The constant movement of the protoplasm, which contains these substances in a solubilized state, ascertains their rapid transport within the cell.

Benefits

• Experiment is part of a complete solution set with a total of 50 experiments for all microscopy applications
• With student worksheet, appropriate for all class levels
• With detailed instructor information, incl. sample microscopy image
• Optimized for tight schedules, i.e. minimum preparation time required
• Microscopy solution set specifically designed to include all required accessories
• Content available with matching multimedia files

Set allowing the performance of 13 experiments about the following topics:

• Photosynthesis (2 methods)
• Transpiration of leaves
• Breathing (CO2 and O2 measurement)
• Glycolysis (2 methods)
• Ionic permeability of the cell membrane
• Determination of the Michaelis constant
• Enzyme inhibition
• Substrate inhibition of enzymes
• Enzymatic activity of catalase

Benefits

• For both demonstration and student experiments
• Data acquisition with the free app “measureAPP” for mobile devices (iOS, Android, Windows)
• Sharing and exporting of the data
• 11 standard experiments in one set
• Compact setup
• All components in one package

Equipment and Technical Data

• Cobra SMARTsense Temperature: Measuring range: -40 … 120 ° C, resolution: 0.01 ° C, sampling rate: 10 Hz
• Cobra SMARTsense pH: Measuring range: -0 … 14, resolution: 0.01, sampling rate: 10 Hz
• SMARTsense Conductivity: Measuring range: 0 … 20,000 μS / cm, 0 … 100 ° C, resolution: 1 μS / cm, 0.1 ° C, sampling rate: 10 Hz
• Cobra SMARTsense Light: Measuring range: 1 lx … 128 klx, resolution: 0.1 lx, sampling rate: 10 Hz
• Cobra SMARTsense Pressure: Measuring range: 20 … 400 kPa, resolution: 0.1 kPa, sampling rate: 800 Hz
• Cobra SMARTsense CO2: Measuring range: 0 … 100,000 ppm, resolution: 2 ppm, sampling rate: 1 Hz
• Lamp socket with reflector, diameter 20 cm, and 120 W filament lamp
• Special glassware
• Special stand material for the experiment setups

Perfect for student experiments.

Function and Applications
Cobra SMARTsense is the ideal solution for inexpensive digitalization of science teaching. The sensors connect wirelessly (Bluetooth) or wired (USB) directly to the student’s digital end device (smartphone, tablet or desktop PC). Measurement data can also be recorded without a connection to an end device using the offline measurement function and read out at a later time. Using the free and award-winning measureAPP measurement software for iOS, Android and Windows, measured values can be easily recorded and graphically displayed. If more evaluations are needed, the measureLAB measurement software for Windows and macOS can be used.

Measure the oxygen concentration of solutions in biology, environmental sciences and chemistry.

Benefits

• Simplicity – Get started right away with the Bluetooth-enabled end device and the free measureAPP
• Completeness – Over 40 sensors with more than 70 measured quantities for all subjects
• Endurance – Intelligent and efficient power management for up to 50 hours on one battery charge
• Variety – The free measureAPP provides perfect support and runs on all mobile platforms and end devices. For professionals, measureLAB is available.
• Performance – Up to 32,000 measured values per second guarantee precision and recordings with up to 17 measuring channels simulaneously are possible.
• Connectivity – Fast connection of sensors and data exchange via Bluetooth – for many sensors additionally possible via USB.

Equipment and Technical Data

• Oxygen in liquid:
  • Range: 0 … 20 mg/l
  • Resolution: 0,01 mg/l
• Oxygen in air::
  • Range: 0 … 100 %
  • Resolution: 0,1 %
• Samplerate:: 10 Hz

Including oxygen probe for Oxygen in air and water.

The sensor contains a USB-C rechargeable lithium polymer battery.

Osmosis describes the phenomenon that solvent molecules move through a partially permeable membrane into a region of higher solute concentration. Thus, the concentration of solute is equalized on both sides. The experimental set-up consists of seven chambers that are filled with solutions of sugar with different concentrations. The liquid column in the capillaries is determined and the dependence of the osmotic pressure on the concentration can easily be shown.

Benefits

• Quantitative determination of the osmosis processes
• Multiple measurement points permit detailed analysis
• Scalable experiment: number of measurement points can be varied

Tasks

1. Investigate the phenomenom of osmosis in a simple model experiment.
2. Determine the dependence of osmotic pressure on concentration of dissolved molecules.

Learning objectives

• Osmosis
• Osmotic pressure
• Concentration

Equipment and technical data

• made from DURAN®
• 2 transparent glass parts, each with a flange and a GL 25/8 neck to insert a capillary tube
• 1 flange clamp of plastic
• 1 set of flange gaskets, pack of 10
• outer diameter of the chamber: do = 3.4 cm
• internal diameter of the chamber: di = approx. 3 cm
• flange diameter: do = 4.7 cm
• length of a segment: approx. 90 mm
• height: approx. 85 mm
• volume per segment: approx. 65 ml
• sealing ring of rubber: material strenth: 1 mm

Accessories

• Capillary tubing, di = 1.7 mm, l = 450 mm (05939-00)
• scale, l = 350 mm (64840-00)

The extensive experiment system enables you to reconstruct and understand the whole biomass cycle without any additional equipment. A cultivation box and hydroculture allow the observation of the sprouting and growth of plants. Thereby the water and nutrient consumption can be analyzed in the different growth phases. Different experiments then show the aerobic as well as the anaerobic degradation of the biomass in a compost or biogas processes. Thus allows the exploration of the energetic use of biomass.

Benefits

• Up-to-date topic related to renewable energies: biomass production, biomass degradation and use of biomass as a source of energy
• Topics: plant growth + nutrients + generation of biomass + degradation of biomass + aerobic and anaerobic processes
• Complete set, no additional components required
• Can be used everywhere as all components are included in transport case

Equipment and Technical Data

The following experiments can be performed:

• Germination of plant seeds
• Plant growth in a hydroculture
• Consumption of water and nutrients
• Aerobic degradation of biomass in a compost
• Anaerobic degradation of biomass to form hydrogen
• Anaerobic degradation of biomass to form methane

Scope of delivery in two transport cases (dimensions: 64 x 37 x 17 cm each) so that no additional accessories are required:

• Plant light
• Measurement modules to measure the energy generated (hydrogen, methane)
• Composter
• Gas-collecting container
• Temperature logger
• Balance
• Diverse glassware and containers
• Stand material
• Additional auxiliary material
• Download instructions for detailed manual for students and instructors

To demonstrate the capillary effect.

Equipment and technical data

• 5 communicating glass tubes of different interior diameters on a round base.
• Capillary diameters (mm): 0.4; 0.8; 1.2; 2.2.
• Diameter of filling tube: 19 mm.
• Height of filling tube: 185 mm.