Photosynthesis – Central Science Supplies

PHOTOSYNTHESIS II: THE SYNTHESIS OF STARCH

adminbenscience — Tue, 13 Oct 2026 17:06:22 +0000

Photosynthesis II examines the phosphorylation of glucose to produce starch in plant cells.
Students collect phosphorylase in potato extract and use it to catalyze the synthesis of starch. They learn that starch synthesis requires primer starch to which glucose residues can be added and that inorganic phosphate inhibits starch synthesis. Required, but not included: blender, fresh potatoes. Designed for 24 students working in six groups of four.
Grades 9-14

PHOTOSYNTHESIS I: THE HILL REACTION

adminbenscience — Tue, 13 Oct 2026 16:46:10 +0000

Using this kit, students carry out a partial process of photosynthesis known as the Hill Reaction, which is the proteolysis of water in isolated chloroplasts. The splitting of water with the evolution of oxygen and the release of hydrogen is measurable in the course of the reaction by the bleaching of the hydrogen acceptor using a spectrophotometer or visual examination. The Hill Reaction is run in the light and in the dark to demonstrate the light dependence of the reaction. Required, but not included: centrifuge, blender, spectrophotometer (optional), a light source, glassware, and fresh spinach or lettuce leaves. Designed for 24 students working in six groups of four.
Grades 9-14

CLINOSTAT – ELECTRICAL

adminbenscience — Tue, 13 Oct 2026 16:09:34 +0000

For demonstration of heliotropism and geotropism. Germinating seedlings are pinned to the cork table which is rotated by an electric motor at 4 revolutions per hour. The motor is spindle mounted and may be clamped so that the place of the table can be set at any angle between horizontal and vertical. An acrylic cover is provided for the cork table to shield the seedlings from droughts. Diameter of cork disc 100 mm

POTOMETER GANONG’S

adminbenscience — Tue, 13 Oct 2026 15:37:48 +0000

Comprises a graduated, narrow bore, horizontal glass measuring tube with a vessel for a plant shoot at one end and having a vertical limb with a stopcock and a funnel fitted by a ground glass joint. Mounted on a plastic stand.

PHOTOSYNTHESIS APPARATUS

adminbenscience — Tue, 13 Oct 2026 15:26:25 +0000

For the measurement and collection of gas evolved by aquatic plants during photosynthesis. The gas evolved can be measured by the calibrated capillary tube and drawn off for analysis by the plastic syringes. Mounted on a plastic panel 190 x 150 mm approx.

POTOMETER I

adminbenscience — Tue, 13 Oct 2026 15:08:00 +0000

deal for laboratory and field use. Allows the students to measure transpiration. The apparatus has only one glass component and is mounted on a strong backing plastic plate. It consists of Capillary tube with millimeter scale connected via three-way tap to syringe.

POTOMETER II

adminbenscience — Tue, 13 Oct 2026 14:49:43 +0000

Use for measuring speed of water absorbed by plant.

Overall size : 350 x 65 x 150 mm
Material : Borosilicate glass
Scaling capillary tube 0.9 x 0.01 ml
Mounted on metal plate base

Dimension :(L) 35.00 x (W) 6.50 x (H) 15.00 cm
Weight :0.350 kg

POROUS POT

adminbenscience — Tue, 13 Oct 2026 14:25:58 +0000

size 150 x 60mm height x dia

POTOMETER H TYPE

adminbenscience — Tue, 13 Oct 2026 14:13:20 +0000

Suitable for individual student use, the cut shoot is attached to the side arm with tubing and the wide glass tube acts as the reservoir. Glass tube 160 x 20 mm with side arm 8 mm diameter. Capillary tube length 140 mm with 1 mm Bore.