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Although bacterial viruses, or bacteriophages, are present in many natural environments, they cannot survive autonomously. They require a host cell to reproduce and survive. In this experiment, students will learn about the different life cycles of bacterial viruses. They will then perform a viral plaque assay to indirectly visualize the viruses and to determine viral titer and multiplicity of infection (MOI).

Nine level conductivity meter shows the relative conductivity/resistance of liquids and solids. As the conductivity of the tested material increases, the number of glowing red LEDs will increase to a maximum of 8, which indicates a very good conductor. There will be zero glowing red LEDs if the material has a very low electrical conductivity (is a good insulator).

The original BootieButler® Shoe Cover is an economical anti-skid and anti-static shoe cover that serves well in a variety of situations

This handy meter measures soil moisture at the root level to prevent over or underwatering. No batteries are needed, so there is nothing to replace or wear out. It includes an instruction booklet, watering guide, and special needs information for 15o plants that correspond to meter readings. Range: 0 (dry) to 10 (wet). Size: 4"L x 2 1/2"W x 1 1/2"H. Probe: 4 1/4"L.

Forged steel fork and hammertone finish make ideal for heavy use. Steel frame has satin chrome finished barrel with clearly graduated markings. Includes positive spindle lock and friction stop. Accuracy 0.076mm.

Includes positive spindle lock and friction stop.

Metric scale: 25mm.

Our newly re-designed variable micropipettes are sturdily designed with volumes ranging from 0.1 to 5000 µl.

Portable for easy, convenient carrying into the field, this pocket-sized meter features a digital display and is equipped with automatic temperature compensation.

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Erlab’s CaptairFlow Clean Air Enclosures are designed to prevent cross-contamination for applications such as non-pathogenic cell cultures, in-vitro cultures, microbiology, homeopathic preparations, electronics, and optics where product protection is required. They feature a high efficiency filtration system that provides a particle-free workstation around the manipulation, bringing HEPA filtered clean air down to the work surface.

For centuries, humans have used selective breeding and conventional hybridization to produce desirable qualities and to increase crop yields. Today, scientists use genetic engineering to directly manipulate the DNA, quickly producing these desirable traits. In this experiment, students will use agarose gel electrophoresis to explore the molecular methods used by scientists to identify genetically modified organisms. No thermal cycler is required. Students are also encouraged to explore the controversy surrounding the use of genetically modified organisms.

Teach your students how to use a micropipette with ease and accuracy with multicolored dyes. A fun and cost-effective way to learn this important skill.

Celestron's SkyMaster Series of large aperture binoculars are a phenomenal value for high-performance binoculars ideal for astronomical viewing or for terrestrial use, especially over long distances.

Scan an entire landscape with oversize prisms that offer an extra-wide, 487' field of view at 1000 yards.

Each set includes three funnels of different sizes. Small funnels are made of polypropylene; large funnels are made of polyethylene. Sizes in small funnel set: 60 mm top dia. x 20 mm stem, 80 mm top dia. x 22 mm stem, 110 mm top dia. x 36 mm stem. Sizes in large set: 127 mm top dia. x 45 mm stem, 160 mm top dia. x 50 mm stem, 200 mm top dia. x 60 mm stem.

High-quality binoculars at an affordable price.

Pay tribute to the men and women who brought us one step closer to understanding the universe around us with the FirstScope. This entry level astronomical telescope is created in honor of Galileo Galilei and many of history’s most notable astronomers and scientists, and it proudly displays their names around the optical tube. A quality Dobsonian style telescope, the FirstScope features a 76mm aperture reflector optical tube that is very easy to observe with — simply navigate the night sky by moving the tube in the direction of your desired object. Compact and lightweight, the scope can travel into the field with you easily, yet makes a decorative accent on your desk or as a classroom display when not in use.

Ideal binocular for comet watching, stargazing, and viewing craters on the Moon.