"Sample+Dippers"

What causes rocks to change over time? This hands-on kit lets students use igneous, sedimentary and metamorphic specimens to examine processes such as weathering, lithification, metamorphism and magmatic assimilation.

Kit includes:
• Samples and study charts for 30 student groups
• Large specimens for easy examination
• Chart with mounted specimens
• Detailed study guide with physical properties and descriptions of more than 50 rocks, minerals, and ores.

High quality, polished watch glasses for general lab use including preventing splashes, drying and evaporation.

The Sol-Vet Butterfly Needle features a removeable multi-sample luer adapter, making its application flexible across multiple uses. This is a safety-engineered device with a sliding safety shield that clicks when activated, telling you the needle is safely locked.

Test method: The Peracetic Acid CHEMets® test kit (0 to 1 and 0 to 5 ppm) employs the DPD chemistry. The sample is treated with an excess of potassium iodide. Peracetic acid oxidizes the iodide to iodine. The iodine then oxidizes DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct proportion to the peracetic acid concentration. Various oxidizing agents such as halogens, ferric ions and cupric ions will produce high test results. Hydrogen peroxide does not interfere with this test if present at levels comparable to the peracetic acid levels.

This general purpose cleaning solution can be used for a variety of applications. Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer. Hanna's cleaning solutions eliminate impurities and residues that are left on electrode surfaces when immersed in samples during measurement or when stored incorrectly. Hanna suggests cleaning the bulb and junction of your electrode on a regular basis to ensure that the probe is always clean and to prevent any clogging of the junction.

Investigate The Source Of A Families Health Problems

Hach Paddle testers allow fast, easy screening of water samples, solid surfaces, and non viscous liquids where unsanitary conditions may exist. The paddle is a double-sided slide attached to the vial cap. Each side of the slide is used to perform a separate test. The slide has a molded-in grid for easy colony counting without opening the optically clear, leakproof vial. Paddle tester, total aerobic bacteria/yeast and mold (tryptone glucose extract agar/sabouraud dextrose agar).

Increments: 100, 110, 120, 130, 140, 150, 160, 180, 200, 250, 300, 350, 400, 500, 700, 1000 ppm

Use our simple handheld colorimeter to get higher accuracy water testing results. Forget about the struggle of matching your sample to a color chart, our total chlorine colorimeter eliminates the struggle and provides you a digital total chlorine result directly. Our ammonia colorimeter brings you more precise technology than your typical chemical test kit giving you accurate and consistent results.

Pre-mixed, and ready to use, this master mix contains DNA polymerase, dNTPs, MgCl₂, and reaction buffers at optimal concentrations for the amplification of DNA via PCR. Its special formulation allows for direct loading of PCR samples into agarose gels as well as tracking the migration during electrophoresis without the need for loading dyes. Simply add template, primers, and nuclease-free water, available separately. Mater Mix reduces risk of contamination. Includes enough for 100 reactions. Note: Can be stored at 4 °C for up to six weeks, or −20 °C for longer.

An introduction to forensic science for grades two to three.

The Rapid Response™ COVID-19 IgG/IgM Rapid Test Device is an in vitro immunoassay for the direct and qualitative detection of anti-SARS-CoV-2 IgM and anti-SARS-CoV-2 IgG in human whole blood (including venous whole blood and capillary whole blood), serum, or plasma.

This advanced ripple tank comes complete with all accessories needed for wave investigations.

Ideal for rooms with shallow countertops or ceilings below 8', these hoods are constructed of sturdy, epoxy-coated steel both inside and out.

Furnished with a 3/16" tempered safety glass counterbalanced sash and duct collar, the hoods ensure your students’ safety. A removable front panel and air foil, vapor-proof interior light, and two-piece adjustable baffle make for easy access and convenient use.

The right side fixture is factory prepared to accept up to three service fixtures, one duplex electrical receptacle, and air monitor. The side wall is factory prepared for a wall-mounted cupsink with turret. Hoods are available in two model types – Basic 47 Hoods with a 4' nominal width are designed as an individual lab station,

Basic 70 Hoods are 6' in width and spacious enough to accomodate numerous samples or workstations.

Both models are available with or without a blower. Blowers may be mounted in or above the hood, or on the roof. Basic 47 hoods that include a blower have a 3/4 hp motor.

Note: Worksurface, base cabinet, and blower are required for operation, and sold separately.

For assistance, contact your local sales representative

These plastic hemacytometers offer repeatable and reliable measurements and analysis

Most natural waters range from pH 4 to pH 9, but commonly are above pH 7 because of carbonates and bicarbonates (alkalinity).