answersLogoWhite

0

Search results

Molecular exclusion chromatography is a type of size exclusion chromatography that separates molecules based on their size and shape. It works by passing a sample mixture through a porous stationary phase, where smaller molecules are able to enter the pores and take longer to elute, while larger molecules pass more easily through the column and elute faster. This technique is commonly used for separating proteins and nucleic acids.

2 answers


Size-exclusion chromatography would be least likely to be utilized in the crime lab compared to other types such as gas chromatography or liquid chromatography. Size-exclusion chromatography separates molecules based on their size, making it less commonly used for the complex mixture analysis typically required in forensic investigations.

2 answers


size exclusion chromatography - http://en.wikipedia.org/wiki/Size_exclusion_chromatography

1 answer


Size exclusion chromatography would be ideal for separating two proteins based on their size. This technique separates proteins by allowing smaller proteins to enter the pores of the stationary phase while larger proteins elute first.

2 answers


Still have questions?
magnify glass
imp

Chromatography separates chemicals based on their affinity for a stationary phase and a mobile phase, allowing them to travel at different rates. Different types of chromatography like gas chromatography, liquid chromatography, and thin-layer chromatography utilize different mechanisms such as adsorption, partition, ion exchange, and size exclusion to separate the components in a mixture. By adjusting the conditions like solvent polarity, temperature, and column material, chromatography can effectively separate complex mixtures into individual components.

1 answer


Molecular sieve chromatography is based on the size exclusion principle, where smaller molecules can enter the pores of the sieve material and take longer to elute, while larger molecules are excluded and elute faster. This technique separates molecules based on their size and molecular weight.

2 answers


The distribution coefficient, Kd, in size exclusion chromatography is calculated using the equation Kd = Vt/Vo, where Vt is the total elution volume of the sample and Vo is the void volume of the column. The distribution coefficient provides information about how the sample components interact with the column matrix based on their size and shape, with larger molecules eluting faster than smaller ones.

2 answers


chromatography has many varieties

-paper chromatography, sometime complexe mixtures cant be separated, TLC plates do not have long stationary phases

-gaz chromatography: the molecule should be volatile

-Chiral Chromatography can be expensive

- Ion Exchange or Ion Chromatography: Turbidity should be low below 10ppm

-Size Exclusion Chromatography: low resolution technique which gives few

peaks and requires large differences in molecular weight for resolution

-Gel chromatography: the target protein frequently becomes an abundant substrate for proteases that may also be present in the mixture. Another disadvantage is low sample handling.

1 answer


Chromatography can still separate components in a non-colored solution based on their different chemical properties such as size, polarity, or charge. For example, in gas chromatography, compounds can be separated based on their boiling points and in size exclusion chromatography, molecules are separated by size. By utilizing these principles, chromatography can successfully separate and analyze components of non-colored solutions.

2 answers


A molecular sieve column separates molecules based on their size and shape by trapping smaller molecules in the pores of the sieve material while allowing larger molecules to pass through. This process is known as size exclusion chromatography.

1 answer


Dextran is are multibranched polysaccharides found to bind with proteins. In this case sephadex we are seeing a brand name for a product made out of this sugar by GE Healthcare. They are used in Size Exclusion Chromatography... (i.e. they run a bunch of fluid through a tube full of these beads and a buffer). The largest proteins flow right on through, the smaller ones get bound up in the beads. If they know the size of the protein they are looking for they can regulate the size of the bead pores to help, and also the chromatography machine has a built in spectrophotometer set at 280 nm (size at which most of your amino acids are reflecting UV- aromatics especially)... so...

simply it is the brand name of bead made of sugar used in a chromatography machine made by GE.

1 answer


Gel chromatography is a size exclusion technique that separates molecules based on their size. Hemoglobin, being a larger molecule, will elute earlier than riboflavin, which is smaller, in a gel chromatography column. By running a sample containing both compounds through the column, hemoglobin will be separated from riboflavin based on their molecular sizes, allowing for individual collection and analysis of each compound.

2 answers


A scientist can use filtration techniques to separate and capture larger pathogens from a sample. Additionally, they can employ imaging techniques such as electron microscopy to directly visualize and identify larger pathogens. Size-based separation methods, like size exclusion chromatography, can also be used to isolate and study larger pathogens in a sample.

1 answer



Factors that affect leaf chromatography include the polarity of the solvent used, the size and shape of the molecules being separated, the pH of the solvent, and the temperature at which the chromatography is performed. These factors can impact the rate at which the molecules move through the chromatography medium and the resolution of the separation.

1 answer


Gel permeation chromatography (GPC) is a type of size exclusion chromatography that separates molecules based on their size. In GPC, a sample is dissolved in a mobile phase and passed through a column filled with porous beads. Smaller molecules enter the pores and take longer to elute, while larger molecules pass through more quickly. The molecules are detected as they elute from the column, typically using a UV or refractive index detector.

3 answers


One way to separate substances with different-sized molecules is through a process called chromatography, where the mixture is passed through a material that selectively interacts with the molecules based on their size. Another method is fractional distillation, where the mixture is heated to separate the components based on their boiling points. Size exclusion chromatography is also effective, as it separates molecules based on their size by allowing smaller molecules to travel through the column more slowly than larger ones.

3 answers


Chromatography is a technique used to separate different types of molecules based on their size, charge, or affinity for a stationary phase in the mixture. This can be done using methods like paper chromatography, thin layer chromatography, or high-performance liquid chromatography (HPLC) depending on the specific separation requirements of the molecules.

2 answers


The main types of chromatography include gas chromatography (GC), liquid chromatography (LC), thin-layer chromatography (TLC), and high-performance liquid chromatography (HPLC). Each type of chromatography separates compounds based on their differing affinities for a mobile phase and a stationary phase.

8 answers


Yes, chromatography can separate monosaccharides based on their differing properties such as size, charge, and interactions with the stationary phase. This technique is commonly used to analyze and separate sugars in various samples.

1 answer


1. thin -layer chromatography

2. gas chromatography

3. liquid chromatography

1 answer


A technique called chromatography or a technique called filtration could be used to separate the red and blue marbles. chromatography would depend on the differences in solubility between the red and blue marbles, while filtration would depend on differences in size or density between the marbles.

3 answers


There are four main types of chromatography: gas chromatography (GC), liquid chromatography (LC), thin-layer chromatography (TLC), and high-performance liquid chromatography (HPLC). Each type of chromatography has specific applications and uses in separating and analyzing chemical compounds.

2 answers


To purify carboxysome proteins for spectrophotometric analysis, you can use methods like chromatography (e.g., size exclusion, ion exchange) to separate and isolate the proteins based on size or charge. Once purified, you can quantify the proteins using a spectrophotometer by measuring absorbance at specific wavelengths corresponding to the protein of interest. Purification and analysis protocols can vary, so it's crucial to optimize conditions specific to the protein being studied.

1 answer


it can be used in everyday life by liquid chromatography, gas chromatography, thin-layer chromatographyand paper chromatography.

1 answer


chromatography seperates substances from an object

1 answer


The column material in gel filtration chromatography is typically composed of porous beads made from materials like agarose or dextran. These beads vary in size and create a porous network that separates molecules based on their size as they pass through the column.

2 answers


Column chromatography, is a broad term for all column chromatography methods, but is also synonomous with Gravity fed methods.

Flash chromotography refers specifically to a column in which the eluant (or mobile phase) is moved through the column under pressure (using a hand pump for small scale, or a pressurised gas for a larger scale), the name Flash is derived from how much faster it is to run a column under pressure than via gravity.

3 answers


Pigments travel at different rates in chromatography because of differences in their molecular size, polarity, and solubility in the solvent. Smaller, less polar pigments will travel further up the chromatography paper because they are less attracted to the stationary phase and can move more easily with the mobile phase.

1 answer


Grass chromatography is a method used to separate and analyze the components of grass samples. It involves using a chromatography technique, such as thin-layer chromatography or gas chromatography, to separate the different compounds present in grass based on their chemical properties. Grass chromatography can be used to identify and quantify specific compounds like chlorophylls, carotenoids, and other pigments present in grass samples.

2 answers


Pigments migrate through a process called chromatography, where they are separated based on their size and solubility in a solvent. As the solvent travels up a chromatography paper, pigments with higher solubility move faster and travel further, resulting in distinct bands of separated pigments. The migration of pigments in chromatography is based on their individual chemical properties and interactions with the solvent.

1 answer


In DNA chromatography, scientists use the principles of chemistry to separate DNA molecules based on their size, charge, or other properties. By utilizing specialized columns and buffers, DNA fragments can be separated and analyzed based on their interactions with the chromatography medium, providing valuable information about DNA structure and function.

2 answers


No, they are different techniques.

1 answer


Journal of Chromatography A was created in 1958.

1 answer


Biomedical Chromatography was created in 1986.

1 answer


Stay away from the exclusion zone.

The exclusion made him think twice about his behaviour.

1 answer


Members of a homologous series may have similar chemical properties due to their structural similarity, making it difficult to separate them by thin layer chromatography. However, slight differences in molecular size or functional groups could potentially allow for separation through careful selection of the chromatography conditions. Additional techniques such as column chromatography or high-performance liquid chromatography may be more suitable for separating homologous compounds.

2 answers


The process used to detect and identify dyes in colorings is called chromatography. This technique separates the dyes based on their properties such as size and charge, allowing for identification by comparing them with known standards.

2 answers



Competitive exclusion principle.

1 answer


Chromatography is used to separate and analyze plant pigments based on their individual characteristics like size, polarity, and solubility. By running a sample through a chromatography column or plate, the different pigments will separate out into distinct bands or spots that can be identified and quantified to study the composition of plant pigments.

2 answers


Silica gel is commonly used in chromatography as a stationary phase due to its high surface area and ability to adsorb a wide range of compounds. It provides good separation of components based on their size, polarity, and interactions with the silica surface.

1 answer


Journal of Chromatography B was created in 1958.

1 answer


High Performance Liquid Chromatography.
High Performance/Pressure Liquid Chromatography

1 answer


hoe RSD calcuate in gas chromatography

1 answer


Raymond P. W. Scott has written:

'Microbore Columns F L12'

'Contemporary liquid chromatography' -- subject(s): Liquid chromatography

'Liquid chromatography detectors' -- subject(s): Chromatographic detectors, Liquid chromatography

'Liquid chromatography for the analyst' -- subject(s): Liquid chromatography

'Chromatographic detectors' -- subject(s): Chromatographic detectors

'Techniques and practice of chromatography' -- subject(s): Chromatographic analysis

1 answer


Anion exchange chromatography and cation exchange chromatography are both types of ion exchange chromatography used to separate molecules based on their charge. The key difference between them is the type of ions they attract and retain. Anion exchange chromatography attracts and retains negatively charged ions (anions), while cation exchange chromatography attracts and retains positively charged ions (cations).

1 answer


To separate a mixture, a student can follow these steps: 1) Determine the physical properties of each component in the mixture, such as boiling point or solubility. 2) Choose a suitable separation technique based on these properties, such as distillation, filtration, or chromatography. 3) Perform the separation method carefully to isolate each component of the mixture. 4) Verify the purity of the separated components using appropriate testing methods.

2 answers


N. A. Parris has written:

'Instrumental liquid chromatography' -- subject(s): High performance liquid chromatography, Liquid chromatography

1 answer


An exclusion will stay in effect until you ask the insurance company to reverse the exclusion.

1 answer