Chemical Methods
Chemical Methods - Related Videos
01:30
Methods of Sterilization II: Chemical Methods
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2023
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements. Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
09:12
Surface Functionalization of Hepatitis E Virus Nanoparticles Using Chemical Conjugation Methods
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Cited by 15 •
2018
We have engineered the capsid protein of hepatitis E virus as a theranostic nanoparticle (HEVNP). HEVNP self-assembles into a stable icosahedral cage in mucosal delivery. Here, we describe the modification of HEVNPs for tumor targeting by mutating surface-exposed residues to cysteines, which conjugate synthetic ligands that specifically bind tumor cells.
09:16
Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils
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Cited by 19 •
2016
Repeated soil sampling has recently been shown to be an effective way to monitor forest soil change over years and decades. To support its use, a protocol is presented that synthesizes the latest information on soil resampling methods to aid in the design and implementation of successful soil monitoring programs.
02:52
Chemical Formulas
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2020
A chemical formula presents information about the proportions of atoms constituting a particular chemical compound or molecule, mainly using symbols of elements and numbers. At times other symbols, such as dashes, parentheses, brackets, commas, plus, and minus signs, are also used. A chemical formula can be one of three types – molecular, empirical, and structural. Molecular Formula The molecular formula represents a molecule or a chemical compound using chemical symbols (to indicate the...
03:10
Chemical Equations
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2020
Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and right)...
FAQs
The outcome depends on matching chemical conditions to the target substance. Molecular structure can determine whether a reagent reacts or binds, while concentration affects the amount of detectable product or interaction. Adjusting pH and temperature changes reaction behavior, and binding specificity helps distinguish one molecule from others. Controlling these variables makes biological measurements more interpretable and comparable.
Chemical methods can produce information through either a measurable reaction or a selective interaction. A reaction may generate an observable chemical change linked to the substance being studied, whereas binding specificity allows a reagent to recognize a particular molecular target. This distinction helps researchers choose an approach for measuring, identifying, separating, or modifying biological substances.
Concentration and pH are especially important when comparing biological samples. If these conditions change, the strength or detectability of a chemical response may also change, even when the underlying samples differ little. Researchers therefore control such variables when examining DNA, proteins, or metabolites, so observed differences are more likely to reflect the biological condition under investigation.
Binding specificity gives chemical analysis a way to focus on selected molecules within complex biological material. In contrast, broader reaction behavior may provide a measurable signal without necessarily distinguishing every component. This selective principle supports applications such as metabolite detection, protein analysis, and sample characterization, while microscopy, genetic methods, or computational approaches can provide complementary evidence.
A chemical workflow begins by selecting a reaction, reagent, or analytical principle suited to the biological question. The sample is then handled under controlled conditions, including relevant concentration, pH, and temperature, before the resulting reaction or selective interaction is measured. Researchers can use the measurement to identify, quantify, separate, or modify substances and compare results across biological conditions.
For DNA and protein studies, chemical methods provide ways to analyze biomolecular composition or behavior through controlled reactions and interactions. The same general approach can be adapted to metabolite detection, where chemical responses help reveal differences between samples. These applications allow investigators to characterize biomolecules and examine biological changes without relying on a single type of measurement.
Chemical staining and sample purification address different practical needs. Staining uses a chemical interaction to make selected biological material more distinguishable, whereas purification uses chemical principles to separate substances within a sample. Drug evaluation represents another application: chemical methods can help assess how substances interact with biological targets, supporting the investigation of potential therapeutic strategies.