Testing & Analysis

  1. Laboratory Microplate and Microtiter Features and Accessory Comparison

    Microplates, or microtiter plates, are designed to hold microliter aliquots of samples for analytical research and clinical diagnostic testing. 

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  2. Gel Imager and Gel Documentation Features, Styles, and Applications Comparison

    Gel Imager and Gel Documentation Features, Styles, and Applications Comparison

    Laboratory gel imagers, or gel documentation systems, are used by research labs to visualize and photo-document nucleic acid samples separated through gel electrophoresis, count microbial colonies, separate protein samples on western blots, and identify mixtures through thin layer chromatography (TLC).

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  3. Lab Transilluminator Features Comparison

    Lab Transilluminator Features Comparison

    Laboratory transilluminators,or gel light boxes, are used by life science labs to visualize DNA, RNA or protein samples separated throughgel electrophoresis. Lab transilluminators contain an ultraviolet UV) or visible blue or white) light source, glass viewing surface, UV-blocking or amber filter cover.

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  4. Rapid Moisture Analyzers and Balances Feature Comparison

    Rapid Moisture Analyzers and Balances Feature Comparison

    Laboratory-Equipment.com is a specialty division of Terra Universal. For nearly 40 years, Terra Universal has served the life science, pharmaceutical, biotechnology, semiconductor, aerospace and medical device markets. Customers appreciate a worldwide network of reps, factory-direct support, and ready-to-ship items available from Terra's manufacturing and warehouse facilities in Fullerton, California.

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  5. Calorimeter Features, Styles, Types, and Differences

    Calorimeter Features, Styles, Types, and Differences

    Laboratory calorimeters measure the enthalpy, or heat transfer under constant pressure, produced or absorbed by a chemical reaction or a change in a material’s physical state. For non-combustible materials, calorimeters are used to determine the sample’s heat capacity. Once the liquid or solid sample is combusted, the resulting temperature change, from the endothermic or exothermic reaction, is reported and used to determine the heat transfer resulting from the reaction.

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  6. Lab Balances and Scales Feature Comparison

    Lab Balances and Scales Feature Comparison

    Laboratory hot plates consist of a heating element installed underneath a plate surface, manufactured from conductive steel or plastic, connected to a digital or analog controller.

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  7. Gel Electrophoresis Features Comparison

    Gel Electrophoresis Features Comparison

    Gel electrophoresis systems utilize a porous, electrically-charged gel matrix to separate distinct nucleic acid and protein sequences based on molecular weight (or fragment size). The gel box is designed to include a cathode, or negatively-charged electrode, at one end of the medium and an anode, or positive-charged electrode, at the opposite end.

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  8. PCR Diagnostic Testing Kits, Vaccine Storage Freezers, and Thermal Cyclers for Infectious Disease Diagnostics

    PCR Diagnostic Testing Kits, Vaccine Storage Freezers, and Thermal Cyclers for Infectious Disease Diagnostics

    Laboratory-equipment.com is Terra Universal's online specialty store for laboratory equipment. You'll find factory-direct products, field-proven expertise, and a wide equipment selection with many additional features for diagnostic testing, sample preparation, and vaccine storage.

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  9. Gel Electrophoresis Stain: What to Use?

    Gel Electrophoresis Stain: What to Use?

    Electrophoresis is a common lab procedure for identifying and separating macromolecules. It was first observed in the early 1800s by a university scientist in Moscow. Like many discoveries, it was accidental, but has proven itself useful for many research scenarios. By applying electricity, technicians use the particles’ negative or positive charges to make them migrate through porous matrix, such as an agarose gel. When positively charged molecules are present in a sample, they will creep towards the negative current (cathode), while negatively charged molecules will migrate to the positive current (anode).

    Besides a source of electricity and gel, this kinetic test requires buffer to help prevent temperature and pH extremes. The type of gel used depends on the sample and application. Gels are “solid,” but porous. Within the gel, larger molecules will travel more slowly and smaller molecules will move quickly. Therefore, molecular size is another w

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  10. Horizontal vs. Vertical Gel Electrophoresis Systems

    Horizontal vs. Vertical Gel Electrophoresis Systems

    Gel electrophoresis allows for the separation of nucleic acids (DNA or RNA) and proteins based on their size. Electrophoresis is used by labs studying vaccines, medications, forensics, DNA profiling or other life science applications. The technique is also used in industry such as mining or food sciences.

    Gel electrophoresis utilizes a porous gel matrix through which proteins or nucleic acids migrate. Both nucleic acids and proteins possess a net-negative electrical charge, a property that is leveraged to facilitate the migration of the desired molecule through the medium.

    The gel box features a cathode at one end and an anode at the other. The box is filled with an ionic buffer, which creates an electric field when a charge is applied. Since the proteins and nucleic acids have a uniformly negative charge, the molecules will migrate towards the positive electrode. The speed of this migration is dependent on how easily the molecules move through the pores of

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