Elongation in plants is primarily stimulated by the hormone auxin, which promotes cell expansion and growth in response to light and gravity. Auxin redistributes within the plant, causing cells on the shaded side of a stem to elongate more than those on the light-exposed side, resulting in phototropism. Additionally, environmental factors such as water availability and nutrient levels can also influence elongation by affecting overall plant health and growth conditions.
One cycle of elongation adds one amino acid to the growing polypeptide chain. Therefore, to produce a protein with 100 amino acids, 99 cycles of elongation are required, as the initial methionine is not incorporated through elongation but rather at the initiation step of protein synthesis.
The elongation of a tension specimen can be measured by marking a gauge length on the specimen before testing it and then comparing the final length of the specimen after it has been stretched to the original gauge length. The elongation can be calculated using the formula: Elongation = ((final length - original length) / original length) x 100%.
To find the elongation of a rubber cord at the equilibrium position, apply Hooke's Law, which states that the force exerted by a spring (or rubber cord) is proportional to its extension or elongation. At equilibrium, the weight of the hanging mass equals the elastic force of the rubber cord. You can calculate the elongation by rearranging Hooke’s Law: ( F = k \cdot x ), where ( F ) is the weight (mg), ( k ) is the spring constant of the rubber cord, and ( x ) is the elongation. Thus, ( x = \frac{mg}{k} ) gives you the elongation at equilibrium.
The cells produced by mitosis undergo a period of elongation in the direction of the axis of the root. It is at this time that they are sensitive to gravity and respond with gravitropism.
Auxin accumulates on the shaded side of the plant stem due to light exposure, causing cells on that side to elongate and bend towards the light source. This creates the bending of the stem towards the light, known as phototropism. The differential growth of cells in response to auxin distribution results in the plant's ability to bend and grow towards light.
auxin
auxin
Growth Hormone (GH)
auxin
Groth in long bones indicates a total lack of hormones.
Internodal elongation is stimulated by
strain is percent elongation/100; for example a strain of 0.02 is 2% elongation. Often we refer to elongation at failure; for example if a material fails at 10% elongation its strain is 0.10
What is the importance of elongation of a material?
no
* yarn elongation is stretching of yarn before breakage of yarn and it is related with workability of machine and process * yarn elongation is nothing but the the fibre strength
Tensile strength and elongation are inversely related in materials. This means that as the tensile strength of a material increases, its elongation decreases, and vice versa. Materials with high tensile strength are typically less ductile and have lower elongation values, while materials with lower tensile strength are more ductile and have higher elongation values.
The answer depends on what causes the elongation: a stretching force (tension) or thermal expansion.