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Biology Secondary Schools

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Digital with tablet, model В-190ТВ

Head: Binocular, 360° rotating and 30° inclined. Interpupillary distance from 48 to 75 mm; dioptric adjuctment on left eyepiece. Built-in 3.1 MP camera.

Eyepieces: WF 10x/18 mm, secured by screw.

'Nosepiece: Quadruple revolving nosepiece, rotation on ball bearings.

Objectives: HC - High Contrast Achromatic 4x/0.10 with anti-fungus treatment. HC - High Contrast Achromatic 10x/0.25 with anti-fungus treatment. HC - High Contrast Achromatic 40x/0.65 with anti-fungus treatment. HC - High Contrast Achromatic 100x/1.25 (Oil/Water) with anti-fungus treatment.

Specimen stage: Double layer mechanical sliding stage, 125x115 mm, 70x30 mm X-Y movement range. Vernier scale on the two axes, accuracy: 0.1mm.

Focusing: Coaxial coarse (adjustable tension) and fine focusing mechanism with limit stop to prevent the contact between objective and specimen.

Condenser: Abbe N.A. 1.25, pre-centered, adjustable height with iris diaphragm.

Illumination: X-LED² with white 3 W LED and light intensity control.

Color temperature: 6,300 K. Multi-plug 100-240Vac/6Vdc external power supply.

Color temperature: 6,300 K.

Price excl. tax: €1,055.83
Price inc. tax: €1,267.00

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Air and its properties, B13

32 feasible experiments Topics: • Atmosphere • Air exists • Air composition • Absolute and relative humidity • Air is impenetrable • Air is elastic • Air pressure • Pascal principle • Compressed air and rarefied air • Air temperature • When the air warms up • Winds • How winds are used • Air has a weight • Atmospheric pressure • Some applications of atmospheric pressure • Barometers • When the air is moving • Air to fly • Air brakes the fall • Air for life • Air pollution • Greenhouse effect • Consequences of the greenhouse effect
Price excl. tax: €227.02
Price inc. tax: €272.42

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Microscope slides - Cell structure and morphology (25 pcs), 15918

Silica cells - adipose cells - spheric cells - elongated cells - elliptical cells - stone cells - scale cells - fibre cells - concrectioned cells - cylindrical cells - polygonal cells - dotted cells - cork-like cells - druse - starch - nuclei - calcium crystals- globoidstannins - raphes - proteins - aleurons - chloroplasts - pelargonin - potato flour.

Price excl. tax: €59.31
Price inc. tax: €71.17

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Price excl. tax: €20.45
Price inc. tax: €24.54

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EXPLORING OUR SENSES 5719

The sense organs are the instruments through which the body can receive and process the stimuli coming from outside. With the material provided in this collection teachers can enrich their lessons through the exhibition of sense organs’ models and conducting meaningful experiments, on physical and chemical stimuli. Even the students, divided into six working groups, can perform simple experiments through which:
- they acquire the knowledge that every sensation contributes to the perception of the outside world;
- they learn to distinguish the information coming from each sense;
- they learn the potentialities and limits of their sense organs and the hygienic standards for their correct use;
- they understand the importance of the connection between the sense organs and the brain in perception.
70 feasible experiments

Topics:

TOUCH
• The skin
• Skin’s sensibility
• Touch’s stimuli
• Pressure’s stimuli
• Pain’s stimuli
• Temperature & heat
• Thermal stimuli
• Hot and cold receptors
• To see through touch
• Fingerprints
• The skin’s hygiene


SIGHT
Light sources and illuminated bodies
Light propagation
Light transports energy
The eye: a light receiver
Lenses
The eye as an optical system
Eyes’ defects and their correction
Resolving power of the eye and visual acuity
The eye-brain system
The persistence of images on the retina
Temporal synthesis of colors
Spatial synthesis of colors
Binocular vision
Sense of depth
Stereoscopic vision
Field of view
Optical illusions
How to help the sight


OLFACTION
• What’s the matter like
• The matter’s aggregation stages
• Changes of state
• The nose: the organ of smell
• How smells are detected
• How smells are identified
• How we get used to smells
• The nose’s hygiene


TASTE
• The tongue and the taste buds
• How we taste different tastes
• The four main tastes
• Taste and olfaction
• Taste and sight
• Good and bad smells


HEARING
• Oscillating motion
• Graphical representation of the oscillating motion
• When we hear a sound
• Why we hear sounds
• Acoustic waves
• How acoustic waves turn into sounds
• The ear: a receiver of acoustic waves
• The ear-brain system
• The limits of audibility
• The distinctive features of sound
• The sensibility of auditory apparatus
• How to reinforce the auditory sensibility
• Stereo phonics
• Echo, reverberation and boom
• Cure of auditory apparatus

Price excl. tax: €940.79
Price inc. tax: €1,128.95

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Animals and human beings 5631

35 feasible experiments
Topics
• Protozoa
• Annelida
• Crustaceans
• Mollusca
• The shells of mollusca
• Insects
• Insect growth
• The anthill
• Anatomy of fish
• Habitats and living conditions
• Animal cells
• Glandular tissues
• Muscle tissues
• Starch digestion
• Fats digestion
• Protein digestion
• Enzymes
• Blood
• Osmotic pressure
• Breathing
• Skeleton
• Skin appendages: fish and reptiles
• Thermal insulation: birds and mammals
• pH and organic reactions

Price excl. tax: €457.61
Price inc. tax: €549.14

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