Coliforms are a broad group bacteria mostly found in the intestines of warm blooded animals. While these organisms are not typically associated with serious illness themselves, they are often used as indicator organisms. The presence of coliforms may indicate a possible presence of other pathogenic…

Magnesium Ribbon: Contains 99% Magnesium, 1% Zinc and Lead.

Be prepared for spills in your lab. This kit contains enough material to clean up a liter of four different kinds of chemicals in your lab. Complete with instruction sheets and SDS. Kit Includes: 1100g Diatomaceous Earth (Flammable Absorbent Material) 1.0kg Acid Spill Cleanup Kit (Acid…

An activity series of metals is a table of metals arranged in the order of their decreasing chemical activity or the ease at which the metal will give up one or more electrons to form positive ions. This table is similar to the electrochemical series of elements. For example if you take the group…

This Innovating Science pH Buffer Calibration Kit includes 500ml of each buffer solution pH 7, pH 4, and pH 10. It also includes 120ml of electrode storage solution. Kit Includes: 500mL Buffer pH 4 500mL Buffer pH 7 500mL Buffer pH 10 120mL Potassium Chloride, 1M DOT Info: Non-regulated

Students collect data using different solvents to identify the optimal solvent for separation. They will then illustrate the intermolecular forces that are acting on the molecules in the separation. Students evaluate the chromatograph with different solvents and establish a connection between…

A major challenge for any scientist is identifying what and how much of something is in a solution. One of the most common measurement techniques used is titration. The activities in this kit will focus on how acid-base titrations work and how to identify the concentration of an unknown acid. Kit…

Often times, when collecting evidence at a crime scene, investigators may recover substances they are unable to identify in the field. Along with evidence such as fingerprints, hair, fibers, etc., there may be traces of unknown chemicals or powders left behind by the perpetrator or perpetrators.…

Students will investigate the suitability of gravimetric analysis for determining the amount of water hardness in the form of calcium carbonate found in various water samples. The activity contains enough materials for 15 groups of students as well as a Teacher’s Guide and Student Study Guide…

Students will study the cellular steps involved in DNA replication and cell division in both mitosis and meiosis. This investigation will allow students to examine the stages of mitosis in the preparation of plant root tips. Crossing over in meiosis will also be investigated through the use of…

Electromagnetic radiation in the UV range of the spectrum cannot be perceived by the human eye. Using the Neulog™ UVB sensor specifically designed to measure UVB radiation, you will compare the amount of UVB radiation reaching the sensor. The sensor will be protected by both SPF15 and SPF30…

KIMAX LABSET with full length 24/40 joints. Case is heavyweight corrugated and inserts are soft foam.

Prepare your own squashed stained slide and be able to identify the phases of plant mitosis and chromosomal development. Students will be able to prepare, stain and mount slides using specially prepared onion root tips. Kit contains enough material for 5 groups. Teacher’s Manual and Student Study…

These PYREX® thermometer adapters have a 24/40 Standard Taper ground joint at one end while the other end is tooled to accommodate a thermometer. The adapter comes with a rubber thermometer holder. For replacement rubber thermometer holders, see No. 7715 (0319W06). This tube is also a…

Bacteria, good and bad, is all around us. In this activity students will collect and grow bacteria and then learn techniques for studying the bacteria they have grown. They will perform a simple staining technique on bacterial cells to study the morphology. They will also perform a differential…

Understand the importance of proteins, carbohydrates, and lipids in living organisms. Students will learn to identify a positive test result for proteins using biuret reagent, examine the reaction between Benedict’s reagent and a simple sugar, use iodine/potassium iodide to test for the presence of…

During the nineteenth century, a Russian chemist Dmitri Mendeleev, began constructing a table of the elements. The work of Mendeleev allows us to understand that the periodic table of the elements is an organized classification of chemical elements based on certain properties of each element in…

The classic unit contains J-hook electrodes made with an aluminum rod and platinum foil, graduated collection tubes, an acid resistant base, and glass battery jar. Instructions included.

Students will use a respiration chamber to measure and record the rate of oxygen consumption (cellular respiration) using germinating seeds versus a non-germinating control sample. Teachers manual and Student Study Guide copymasters are included. There are enough materials provided for 8 lab…

Kit Includes: 1 Instruction Sheet/SDS 2 Nitrile Gloves 2 Polybags 9? x 16? 2 Twist Ties 2 Blank Shipping Tags 1 Dustpan and Brush Set 1 Bag Vermiculite Absorbent 1 Bag Neutralizing Mixture (Calcium Hydroxide, Sodium Carbonate, Calcium Carbonate, Litmus Powder) DOT Info: Non-regulated WARNING:…

Several liquids of varying color are added to a cylinder. Due to differing densities of the liquids, a density gradient is formed resulting in a layered, multi-colored column. As an optional investigation, the relative density of small solid objects may be compared by dropping them in the density…

Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic. Once that skill is learned they can move on to test some common items that would be found around…

Students will study the process of transpiration/transpiration pull and the role it plays in water/nutrient movement in plants. They will study the role of stomata in relation to the transpiration process using a potometer to examine the rate of transpiration in a bean seedling under a select set…

Top quality Molymod molecular model sets are for use by students, teachers, and researchers. May be upgraded or customized with additional model parts, for more info, go to sigma-aldrich.com and enter Molymod in our search engine. Scale is 2.8 cm =100 pm (open style) and 1.45 cm = 100 pm (compact,…

Correlated to the Next Generation Science Standards This kit is a unique teaching tool for introducing your students to the fascinating chemistry and physics behind invisible inks, i.e. colorless substances usable for writing that can be made to turn to color using a chemical or physical…

Students will genetically engineer bacteria through transformation with a plasmid that confers antibiotic resistance. They will then examine the number of resistant bacteria to determine the efficiency of the transformation procedure. Teachers manual and Student Study Guide copymasters are…

In this lab, students will learn the basic structures and pathway of the digestive system and understand the different functions of the stomach and the small intestine in regards to digestion. They will investigate how the properties of different enteric coatings react in different sections of the…

While sources of fresh water are usually associated with visible bodies of water such as lakes, rivers, ponds, and streams, the majority of fresh water on Earth is actually underground, collectively referred to as groundwater. Like fresh water found on the surface, groundwater can flow beneath the…

Using the materials provided, students will be able to examine the effects of nutrient deficiency on plants. Specially prepared nutrient solutions (included in the kit) will allow students to deprive each plant of one of seven specific vital nutrients. Over time, students will determine the…

Show an example of polymer chemistry. Make your own nylon which is a synthetic compound of high molecular weight that consists of up to millions of repeated chemical units that are linked together. This polymer is referred to as Nylon 6-10. Aligned to the Next Generation Science Standards (NGSS)* …

This kit has been designed to introduce students to the field of document analysis. Experiments in this kit cover the areas of paper analysis, hand writing analysis, detection of a forgery, recovery of mechanical/chemical erasures, hidden message discovery and ink analysis. Students will make use…

Students determine the equilibrium constant of three unknown acids and compare the data to known values to identify them. Kit Includes: 1 x 10g Benzoic Acid Crystals 1 x 10g Potassium Hydrogen Phthalate 1 x 10g Sodium Bisulfate (Sodium Hydrogen Sulfate) 10 x 250mL Sodium Hydroxide, 0.1M Solution 4…