"Ionic+Properties+Learning+Activities"

These restriction enzymes are used to recognize specific sequences in double strand DNA. BamH I recognizes 5-G/GATCC-3, Ecor I recognizes 5-G/AATTC-3, and Hind III recognizes 5-A/AGCTT-3. The activity level of all our restriction enzymes is 10 units per 1 µl.
All are shipped next day on ice. As they are perishable, a ship date must be specified.

Active clamp style current probe has dual sensitivity ranges, 100 mV/A and 10 mV/A for current measurements up to 10 A or 100 A, respectively. Bandwidth in both ranges up to 300 kHz. Powered by 9 V battery or included AC power adapter.

This safety-engineered device has a sliding safety shield that clicks when activated, alerting you that the needle is safely locked.

Provide a convenient, positive, quick-acting means for holding flask and cover together firmly.

Active clamp style current probe has dual sensitivity ranges, 500 mV/A and 50 mV/A for current measurements up to 7 A or 70 A, respectively. Bandwidth in both ranges up to 1 MHz. Powered by 9 V battery or included AC power adapter.

The Universal Specific Gravity Kit is designed to be used with any electronic scale with a minimum capacity of 15 grams and a tare (re-zeroing) function to easily measure the specific gravity of gemstones and minerals.
Just weigh the stone "in air" on the integrated weighing platform of the scale, then without changing the setup, weigh the stone in water by placing it in the underwater weighing pan of the gem holder suspended above the platform. Plug the two values into the specific gravity equation and obtain the specific gravity of your stone.

Includes: lightweight gem holder support and underwater weighing pan, independent, spill-resistant, adjustable beaker support, beaker for filling with water - 100ml capacity, aluminum test weight, stainless steel tweezers, instructions, reproducible Specific Gravity worksheet, table of 300 common minerals/gems sorted by SG, with 6 other properties, including refractive index.

Note: shown with Boreal Balance - not included.

Full Year Course Prepares Students For AP And College

Improve student test scores and involve parents in the process fun, exciting, interactive, and inclusive, these sets of content-based games help students master curriculum outlined in the current NSES Standards for grades 1 to 8.

Conduct Simulation-Based Experiments in a Virtual Lake Ecosystem

This unique heart model shows the long-term effects of increased heart activity due to high blood pressure. The muscular wall of the left heart ventricle is considerably thickened and the tip of the heart is visibly rounded off. Highly detailed 2-part heart at a price you will love.

Soft Models Are Great For Small Hands

Explore a full range of motion with the advanced hydraulic arm

Preserved specimens in resin material.

By choosing an ELGA water purification system, you are making an investment in quality, reliability and value.

Over 750 Total Curriculum Questions

Build carbohydrates, proteins and lipids!