melting temperature


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tem·per·a·ture mid·point (Tm, tm),

the midpoint in the change in optic properties (absorbance, rotation) of a structured polymer (for example, DNA) with increasing temperature.
Synonym(s): melting temperature

melting temperature

The point in a DNA hybridisation reaction at which 50% of the nucleotides are annealed (linked) to their complement (i.e., are double-stranded), which is a function of the stringency of the hybridising conditions.
References in periodicals archive ?
m] versus crystallization temperature curve with a maximum at approximately the median between the glass transition temperature at -35[Degrees]C and the melting temperature at 61[Degrees]C.
These [values] are somewhat higher than previous estimates of the melting temperature of iron,' which were based in part on extrapolations from low-pressure data, says Williams.
However, when Gregoryanz and his colleagues raised the pressure on solid sodium beyond 30 gigapascals--300,000 times atmospheric pressure at sea level--the metal's melting temperature began to drop.
The net result is an apparent independence of the melting temperature on ethylene contents above ~12 wt % when only the peak melting temperature is recorded.
8% Si at a melting temperature of 2600F (1427G) is -75,712 calories.
6] The physical behavior and the final use properties of the blend result from a combination of the effects related to the following main factors: 1) molecular structure and chemical nature of the components; 2) blending procedure; 3) blend composition; 4) melt viscosity of the components and phase viscosity ratio; 5) conditions of crystallization (low or high undercooling - defined as the difference between the equilibrium melting temperature and the crystallization temperature), stationary-quiescent crystallization, or crystallization during flow under shear forces; 6) processing conditions; 7) adhesion between the dispersed phase and matrix: structure of interfaces; and 8) location and structure of the elastomeric phase in the blend material after crystallization.
According to technical marketing manager Igor Leclere, the alloy component with the highest melting point must be preblended above its melting temperature with Lotader in a ratio of 40/60 in order to "encapsulate" the engineering resin with the compatibilizer matrix.
In particular, for high molecular weight PC such as S3000 and S2000, increasing melting temperature from 280 to 300[degrees]C was able to significantly improve replication.
Many factors, including salinity and pressure, affect ice's melting temperature.
Experts have long viewed carbon conversion as the key technical challenge for LT:BLG because the melting temperature for kraft-liquor smelt creates an upper limit on operating temperature.
The foundry had steel with a melting temperature of 2700F (1482C) at the bottom of the furnace, followed by pig iron that melted at 2000F (1093C).
The topsheet is made of a carded web of fibers having a first melt temperature, while the polymeric sheet has a second melting temperature and a property of shrinking under the application of heat.