biological chemistry

Difference between Collagen and Keratin – Comparison Table


Collagen vs Keratin

Collagen vs Keratin
(Similarities and Differences between Collagen and Keratin)

Collagen and Keratin are the main structural proteins. They are two main families of fibrous proteins and are abundantly present in the extracellular matrix and various connective tissues in animals. 

Collagen: A linear structural fibrous protein abundantly found in the connective tissue and extracellular space of the cells. They are also found in tendons, ligaments, cornea, cartilage, bone, blood vessels, intervertebral discs and the dentine in teeth.

Keratin: A structural protein abundantly present in epithelial cells. They protect the epithelial cells from damage or stress. Keratin is also present in appendages such as feathers, hairs and nail, horn, claws and hooves of animals. Keratin is the structural material that makes the human skin.

The present post discusses the similarities and Differences between Collagen and Keratin with a Comparison Table.

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Difference between GM Counter and Proportional Counter


GM Counter vs Proportional Counter

Proportional Counter vs GM Counter
(Difference between Proportional Counter and GM Counter)

Proportional counter and GM counters are devices to detect and quantify radiations. The proportional counter is able to detect the energy of incident radiation and produce an output proportional to the intensity of the radiation. A GM counter detects ionizing radiation such as alpha particles, beta particles and gamma rays using the ionization effect produced in a Geiger–Müller tube. Both the instruments can quantify the intensity of radiation and have immense application in research, medicine and nuclear industry. The present post discusses the differences between a Proportional counter and a GM counter with a comparison table.

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Difference between GM Counter and Scintillation Counter


GM Counter vs Scintillation Counter

GM Counter vs Scintillation Counter
(Similarities and Differences between GM Counter and Scintillation Counter)

Geiger–Müller or GM Counter and Scintillation Counter are two commonly used devices to detect and quantify the radiation. The GM counter can detect all kinds of radiations such as alpha, beta and gamma rays, whereas the scintillation counter can detect only ionizing radiations. There are considerable differences in the working principle and applicability of GM counter and the Scintillation counter. The present post discusses the difference between G.M. Counter and Scintillation counter with a comparison table.

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Difference between Gas Solid Chromatography and Gas Liquid Chromatography: Comparison Table


Difference between GSC and GLC

Gas-Solid Chromatography (GSC) vs Gas-Liquid Chromatography (GLC)
(Difference between GSC and GLC Chromatography)

Gas Chromatography or GC is a chromatographic technique used for the separation of volatile compounds. In GC, a mixture of volatile compounds with differential migration passes through a column containing solid or liquid stationary phase. In GC, the mixture to be separated should be in gaseous phase and the mobile phase used will be always in the gaseous state (usually an inert gas such as nitrogen, helium or argon). Based on the states of stationary phases, there are two types of Gas Chromatography techniques: (1) Gas Solid Chromatography (GSC) and (2) Gas Liquid Chromatography (GLC).

(1). Gas Solid Chromatography (GSC): In GSC, the stationary phase is in the solid state (liquid phase is absent). The stationary phase is coated in the interior of the column. Molecules in the stationary phase will interact with the mobile phase through adsorption forces.

(2). Gas Liquid Chromatography (GLC): In GLC, the stationary phase is a nonvolatile liquid. The liquid stationary phase is coated on an inert support in the column. The mobile phase will be an inert gas such as nitrogen, helium or argon.

There are considerable differences in the working principle, mobile and stationary phase and the efficiency of GSC and GLC. The present post discusses the similarities and differences between Gas Solid Chromatography (GSC) and Gas Liquid Chromatography (GLC) with a comparison table.

Similarities between Gas Liquid and Gas Solid Chromatography

Ø  Both are GSC and GLC are Gas chromatographic techniques.

Ø  Both uses gaseous mobile phase (usually an inert gas such as N, He etc.).

Ø  Both are used for the separation of volatile compounds / mixtures.

Ø  Heat labile compounds cannot be separated.

Ø  Both GSC and GLC can be analytic or preparatory.

Ø  Both types of GC use similar type of detectors.

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Human Physiology Lecture Notes

Difference between Rod Cells and Cone Cells (Comparison Table)


Rod cells vs cone cells

Rod cells vs Cone Cells
Similarities and Differences between Rod Cells and Cone Cells

Rod cells and Cone cells are the two types of photoreceptor cells found in the retina of eyes. These cells are capable of absorbing light and converting the light into signals that can trigger a change in the membrane potential, which results in visual phototransduction. In other words, these cells assist in vision in presence of light.

Rod cells: A type of photoreceptor cells in the eye found concentrated at the outer edges of the retina. Rod cells are responsible for vision in low light conditions.

Cone cells: The second type of photoreceptor cell in the eye concentrated in the fovea of the retina. Cone cells are responsible for the vision in bright light and colour vision.

rod vs cone cells

image source: wikipedia

The present post explains the similarities and differences between Rod cells and Cone cells with a comparison table.

Similarities between Rods and Cones

Ø  Both rods and cones are photoreceptor cells of the eye.

Ø  Both can absorb photon (light)

Ø  Both cells possess photoreceptor proteins to absorb the photons (light).

Ø  Both are modified nerve cells.

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