Laboratory Reagents
Laboratory Reagents - Related Videos
10:17
Preparing Anhydrous Reagents and Equipment
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2023
Source: Laboratory of Dr. Dana Lashley - College of William and Mary Demonstrated by: Timothy Beck and Lucas Arney Many reactions in organic chemistry are moisture-sensitive and must be carried out under careful exclusion of water. In these cases the reagents have a high affinity to react with water from the atmosphere and if left exposed the desired reaction will not take place or give poor yields, because the reactants are chemically altered. In order to prevent undesired reactions with H2O...
09:45
A Protocol for Safe Lithiation Reactions Using Organolithium Reagents
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Cited by 5 •
2016
The safe and proper use of organolithium reagents is described.
01:26
EDTA: Auxiliary Complexing Reagents
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2024
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
08:00
Measuring Mass in the Laboratory
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2023
The analytical balance is the common piece of equipment in the scientific laboratory. These highly precise instruments can measure down to ten thousandths or even hundred thousandths of a gram. The triple beam balance is a type of scale that uses counterweights on a three rider beams to counterbalance the sample in the pan. On the other hand, modern analytical balances use a complex system of electronic sensors to accurately mass a substance. The analytical balance is so sensitive that it...
07:27
The Development of Lyophilized Loop-mediated Isothermal Amplification Reagents for the Detection of Coxiella burnetii
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Cited by 7 •
2016
We described here a simple loop-mediated isothermal amplification (LAMP) method using lyophilized reagents for the detection of C. burnetii in patient samples.
FAQs
These variables can change whether a reagent produces a consistent reaction or measurement. Concentration influences reaction strength, temperature affects reaction behavior, purity limits unintended interactions, and storage helps preserve chemical or biological activity. Controlling them allows researchers to distinguish genuine biological effects from reagent-related variation, which is especially important when comparing results across experiments or laboratories.
Buffering helps maintain pH within the conditions required for a biological or chemical reaction. Because changes in pH can alter reaction behavior, a suitable buffer supports more stable measurements and manipulation of biological systems. This control is relevant to molecular assays, cell culture, and other experiments where reproducible reaction conditions are necessary.
Reagents can support experiments through distinct interactions. Catalytic reagents promote enzymatic reactions, binding reagents recognize or associate with target molecules, and labeling reagents make cells or biomaterials detectable. Selecting among these functions depends on whether the experiment must drive a reaction, identify a target, or monitor a biological material or engineered system.
Standardization reduces variation in how reagents are selected, prepared, handled, and applied. Consistent reagent properties make it easier to compare measurements, repeat molecular or cell-based experiments, and determine whether an observed result reflects the biological system rather than uncontrolled experimental differences. This supports reliable validation of engineered systems and experimental findings.
Selection should match the intended interaction and experimental setting, including whether the reagent must buffer conditions, catalyze a reaction, bind a target, or label a sample. Researchers also need to consider concentration, temperature, purity, and storage because these factors influence performance. Careful selection improves the reliability of measurements and biological manipulation.
They support molecular assays, cell culture, biomaterial fabrication, and diagnostic development. In these settings, reagents can help analyze biological function, maintain or manipulate experimental systems, assemble engineered materials, or detect relevant targets. Their use spans both measurement and construction, allowing researchers to investigate biological behavior while developing and evaluating bioengineered systems.
Reliable reagent selection and standardization help connect laboratory findings with later use in clinical or industrial settings. Consistent performance strengthens confidence in measurements, engineered-system validation, and diagnostic development. By controlling reagent-dependent variation, researchers can produce results that are easier to reproduce and assess when considering broader implementation beyond an individual laboratory experiment.