Transition temperature. Medical search. Frequent questions

Although this state transition takes place gradually over a range of temperatures, the glass transition temperature range (Tg) is often designated by a specific temperature. (ien.eu)
The actual glass transition temperature range depends upon the molecular structure of the material, the testing method, sample preparation, the cure schedule, and the degree of cure. (ien.eu)
This is the glass transition. (tainstruments.com)
The glass transition is heavily influenced by such factors as the crystallinity of the polymer, crosslinking, and plasticizers. (tainstruments.com)
This note will detail the use of dynamic mechanical analysis (DMA) and rheology to characterize the glass transition of a polymeric material. (tainstruments.com)
The glass transition occurs over a range of temperatures and is not a point or single temperature. (tainstruments.com)
It is helpful to define unambiguous points within the transition region to characterize the glass transition which we will refer to as T g . (tainstruments.com)
Often the glass transition is reported as a single temperature but the details of how it was determined are needed to make any quantitative comparison of two materials. (tainstruments.com)
The glass transition temperature depends on the polymer but is heavily influenced by many factors that will be discussed in the applications section. (tainstruments.com)
The method of determining the glass transition points is identical for either extensional or shear deformation and should yield identical results in isotropic materials. (tainstruments.com)
Rheological and DMA techniques are particularly sensitive to the glass transition compared to DSC and TMA. (tainstruments.com)
The glass transition from the storage modulus onset is typically the lowest T g measured by DMA and rheological methods. (tainstruments.com)
What is the Glass Transition Temperature of Plastics? (plasticranger.com)
When an amorphous polymer is heated, the temperature at which the polymer structure turns "Sticky liquid or rubbery" is known as Glass Transition Temperature or Tg. (plasticranger.com)
The value of glass transition temperature depends on the mobility of the polymer chain, and most synthetic polymer ranges between 170,000 to 500,000. (plasticranger.com)
Hard and rigid plastics like polystyrene and poly(methyl methacrylate) are used below their glass transition temperatures, meaning that when they are in their glassy state, their Tg values are around 100 °C (212 °F). (plasticranger.com)
The glass transition temp. (plasticranger.com)
How to Measure Glass Transition Temperature? (plasticranger.com)
The most common test method to determine the glass transition temperature of plastics is ASTM E1356. (plasticranger.com)
The test methods are only applicable for amorphous and crystalline materials with stable partial amorphous regions that are stable and do through decomposition in the glass transition region. (plasticranger.com)
For polymeric materials, like Poly(methyl methacrylate), the glass transition temperature (Tg) plays an important role in making them suitable for a variety of applications. (makevale.com)
The main disadvantage of PMMA is its relatively low glass transition temperature (Tg) of around 105°C, making it an unsuitable material choice for applications such as optical equipment. (makevale.com)
The glass transition temperature (T g ) was the critical temperature for determining the excess light scattering of poly(methyl methacrylate) (PMMA) glasses. (elsevierpure.com)
Tanio, N & Koike, Y 1996, ' Light scattering loss and glass transition temperature of optical polymer glass ', KOBUNSHI RONBUNSHU , vol. 53, no. 10, pp. 682-688. (elsevierpure.com)
A new methodology was developed to probe glass transition temperatures (Tgs) of polymer thin films supported on gold substrates and confined between two solid (silica and silver) surfaces based on the surface plasmon polariton (SFPP) signals generated by sum frequency generation (SFG) spectroscopy. (tsijournals.com)
The glass transition temperature (T ɡ) of bloodmeal dropped from 493 to 263 K using only water as a plasticizer but was restored when freeze dried. (waikato.ac.nz)
The resulting glass transition temperature from the frequency corrected reversing heat flow is thereby shown to be independent of frequency. (psu.edu)
We have studied the dewetting process of thin polystyrene films on nonwettable substrates in the viscoelastic regime slightly above the glass transition temperature. (uni-freiburg.de)
However, the ideal temperature for heat application depends on the thermal behavior of each material, such as glass transition (T g ) and initial degradation temperatures. (bvsalud.org)
The glass transition temperature (Tg) of the droplet phase is lower than that of silica-rich glass matrix. (aau.dk)

As the temperature continues to rise, the polymer eventually experiences a profound state change to a more pliable, rubbery state. (ien.eu)
When heating a polymer from the glassy state it transitions from a hard and brittle material to a softer rubbery material with more viscous properties. (tainstruments.com)
Think of polycarbonate, polyethylene terephthalate, or polyvinyl chloride polymers for examples of a glassy polymer at room temperature. (tainstruments.com)
It is also stated as a temperature at which amorphous polymer starts showing glassy-state properties such as stiffness, rigidness, and brittleness after cooling. (plasticranger.com)
The detected abrupt change of the temperature-dependent SFPP signal demonstrated the viability of this methodology to determine Tags of polymer thin films. (tsijournals.com)
The evolution of the shape of the dewetting rim for varying film thickness, molecular weights and dewetting temperatures allowed us to determine the relaxation rates of residual stresses, which originated from nonequilibrated polymer chain conformations formed during film preparation by spin-coating. (uni-freiburg.de)
130-155°C), that results in a rigid polymer at physiological temperatures. (medscape.com)
PFAS molecules are captured by the dissolved smart polymer flocculant at ambient temperature and then collected into an insoluble solid pellet above the transition temperature of polymer. (nih.gov)

The order parameters dependence on reduced temperature is independent of LCLC concentration, salt concentration, or cation size. (aps.org)
The low frequency Raman spectrum has been measured at different low temperatures and the temperature dependence of the frequencies are discussed in terms of microscopic approaches to the phase transition problem. (njit.edu)
In Part (B), we have explored the temperature dependence of the Raman phonons of spin-ice Dy2Ti2O7 and compared with the results of two non-magnetic pyrochlores, Lu2Ti2O7 and Y2Ti2O7. (iisc.ac.in)

Master Bond EP30QF is a quartz filled, two component epoxy for high performance bonding, sealing, coating and casting, formulated to cure at room temperature or more rapidly at elevated temperatures offering The product offers chemical resistance. (ien.eu)
Polypropylene, polyethylene, and many rubber polymers are good examples of materials in the rubbery state at room temperature and these materials are commonly found in squeeze bottles, tubing, and (obviously) rubber. (tainstruments.com)
This is because they're soft and flexible in that state, and crosslinking intercepts are accessible for their molecules, thus providing rubber with a fixed shape at room temperature. (plasticranger.com)
The main reason is that these materials transition to the superconducting state at temperatures well below room temperature. (aps.org)
predicted for any material, and it unveils a potentially new pathway to achieving superconductivity at room temperature. (aps.org)
Condensed-matter physicists have devoted enormous theoretical, computational, and experimental efforts to finding a room-temperature superconductor. (aps.org)
C. fleas were sent to our laboratory in sealed, preservative-free, felis is apparently the main vector of this new rickettsial dis- plastic tubes at room temperature. (cdc.gov)
In addition to being biodegradable, the biopolymer has a unique property-it has been engineered to transition from a liquid at room temperature to a gel-like state when warmed to body temperature. (nih.gov)

The phase transitions of all as grown vanadium oxide films on Al6061 were characterized by the differential scanning calorimetry (DSC) technique. (csircentral.net)
The thin films showed reversible and repeatable phase transitions at sub-zero level of temperatures e.g., similar to(-23.3 degrees C). Thus, the VO thin films developed in the present work emerge out to be of paramount importance for the smart radiative device applications in spacecraft. (csircentral.net)

Abstract: The 1987 discovery of high-TC superconductivity in ceramic materials at temperatures around 90K set off a frenzy of research in the development of high-TC electronics, motivated by the prospects of electronics operating in liquid nitrogen at 77K opposed to 4K liquid helium. (rochester.edu)
The observation of superconductivity in "quantum paraelectrics"-materials with low temperature incipient ferroelectricity-has raised several fundamental questions on the pairing mechanism in such systems. (nature.com)

The temperature at which the polymers are heated depends on their chemical structure and thus can be used to identify polymers. (plasticranger.com)
For long chain polymers, we found rates notably faster than the longest bulk relaxation processes, highly independent of molecular weight and temperature. (uni-freiburg.de)

The thermal gradient between the cold air and warmer sea increased throughout the MIS5a/4 transition, and was marked by three intervals of even more pronounced thermal gradients associated with the C20, C19 and C18' cold events. (nature.com)
For both ways, DTA and DSC, their peaks are related to endothermic and exothermic transitions with thermal input and show phase changes. (plasticranger.com)
Transition temperatures of bloodmeal, modified bloodmeal, and processed bloodmeal-based thermoplastics were compared using material pocket dynamic mechanical thermal analysis. (waikato.ac.nz)
The phase transition has been found to involve a distortion of the unit cell at ≈278°K followed by a distortion of the azide ions at ≈225°K. The latter temperature is close to the value observed by differential thermal analysis. (njit.edu)
Thermal analyses were performed by DSC and TGA using a temperature range from 25 ºC to 900 ºC. (bvsalud.org)

abstract = "2H-NbSe2 is the prototype and most frequently studied of the well-known transition metal dichalcogenide (TMDC) superconductors. (princeton.edu)

Transitions in polymeric materials provide invaluable information about the material. (tainstruments.com)

We explain this inconsistency by demonstrating that the temperature of the tetragonal-to-orthorhombic phase transition in methylammonium lead triiodide depends on the concentration and nature of local defects. (lu.se)

Does it make any sense to run a TD-DFT calculation with Finite-Temperature SCF active? (stackexchange.com)
This range also covers the the relevant parameter range of the finite temperature calculations. (arxiv-vanity.com)

More formally, it is the temperature at which two crystalline forms of a substance can co-exist in equilibrium. (wikipedia.org)
The pressure in the gaseous, the isotropic liquid and nematic liquid crystalline states, as well as the isotropic-nematic transition temperature are calculated for a model system composed of non-spherical particles. (degruyter.com)
Since thermoluminescence involves electronic transitions within crystalline materials, the effect of temperature on asbestos cytotoxicity was evaluated. (nih.gov)

Effects of 2.45-GHz microwave and 100-MHz radiofrequency radiation on liposome permeability at the phase transition temperature. (cdc.gov)
The effects of 100MHz continuous wave (CW) radiofrequency and 2.45 gigahertz (GHz) CW microwave radiation on liposome permeability and phase transition temperatures were investigated. (cdc.gov)

We are pleased to invite you to an open lecture: "Establishment of the first-principles method for calculating superconducting transition temperature" (click on the image to enlarge). (skoltech.ru)
Here I assume that conventional superconductors refer to materials that undergo a superconducting transition at low temperature as described by the Bardeen-Cooper-Schrieffer theory (BCS). (stackexchange.com)
We show that electroplated Re ﬁlms in multilayers with noble metals such as Cu, Au, and Pd have an enhanced superconducting critical temperature relative to previous methods of preparing Re. (nist.gov)
As 2H-NbSe 2 is widely acknowledged as a conventional superconductor, its transition temperature to the superconducting state (T c ) is 7.3 K, a T c that is substantially higher than those seen for the majority of TMDCs, where T c values between 2 and 4 K are the norm. (princeton.edu)
Recent experiments on Nb-doped SrTiO 3 have shown that the superconducting energy gap to the transition temperature ratio maintains the Bardeen-Cooper-Schrieffer (BCS) value throughout its superconducting dome. (nature.com)
The resulting reduction in phase space would naturally result in reduction of the superconducting transition temperature T c . (nature.com)

Adhesives in space applications are subject to high vacuum and extreme temperatures, making adhesive choice a critical design consideration. (ien.eu)
As result, we show a temperature-dependent density transition of intracapsid DNA occurring between two coexisting phases-a hexagonally ordered high-density DNA phase in the capsid periphery and a low-density, less-ordered DNA phase in the core. (nih.gov)
For non-zero values of the quark masses the transition to the high temperature phase of QCD is signaled by peaks in response functions. (arxiv-vanity.com)
We have investigated these systems at high pressures and at low temperatures using Raman spectroscopy. (iisc.ac.in)
Moreover, Raman and x-ray studies have shown that Tb2Ti2O7,Sm2Ti2O7,and Gd2Ti2O7 undergo a structural transition followed by an irreversible amorphization at very high pressures (~ 40 GPa or above) [Appl. (iisc.ac.in)
He obtained a PhD in Materials Science from the UC San Diego in 2005 studying high-transition temperature Josephson devices. (rochester.edu)
In a high temperature approximation, and for a special choice of model parameters, results are presented and displayed graphically. (degruyter.com)
We propose that upon cooling from 160 to 140 K, domains of the crystal containing fewer defects stay in the tetragonal phase longer than highly defected domains that readily transform to the high bandgap orthorhombic phase at higher temperatures. (lu.se)
One of the remarkable applications of the cavity method in the mean field spin glasses is to prove the validity of the Thouless-Anderson-Palmer (TAP) system of equations in the Sherrington-Kirkpatrick (SK) model in the high temperature regime. (projecteuclid.org)

Low-temperature structural properties of the synthetic mineral libethenite Cu 2 PO 4 OH were investigated by single-crystal X-ray diffraction, synchrotron X-ray powder diffraction, specific heat measurements, and Raman spectroscopy. (nyu.edu)
In this paper we will research the molecular structure and the arrangement changes during the phase transition process of the stilbazoles by temperature-variable FTIR spectroscopy.The results show that the number of the gauche conformation is increasing as the temperature increasing. (elsevierpure.com)
Jiang, S, Zhou, H & Tian, Y 2000, ' The Molecular Structure and the Arrangement Changes of Stilbazoles in the Phase Transition Process Studied by Temperature-variable FTIR Spectroscopy ', Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis , vol. 20, no. 6, pp. 760. (elsevierpure.com)
Transition Path Times Measured by Single-Molecule Spectroscopy. (nih.gov)

I recently received the task to investigate what is happening in a fluorescent molecule in different temperatures. (stackexchange.com)

The low frequency spectrum becomes fairly complex at low temperatures due to an orthorhombic distortion of the Phase I lattice. (njit.edu)

This method is a good indicator of when the mechanical strength of the material begins to fail at higher temperatures and is particularly useful for determining the useable range for a load bearing element. (tainstruments.com)

Salt effects on transition temperatures and orientational order of lyotropic chromonic liquid crystals. (aps.org)

We previously found a temperature-induced, solid-like to fluid-like mechanical transition of packaged λ-genome that leads to rapid DNA ejection. (nih.gov)

By tinkering with the composition of this biopolymer, we can control the exact temperature where it transitions from a liquid to a gel. (nih.gov)

In particular, the influence of the baryon resonances, and their couplings to the scalar and vector fields, on the characteristics of the chiral phase transition as a function of temperature and baryon-chemical potential is investigated. (uni-frankfurt.de)

A second-order structural phase transition from the Pnnm symmetry (a=8.0553(8) Å, b=8.3750(9) Å, c=5.8818(6) Å at 180 K) to the P2 1 /n symmetry (a=8.0545(8) Å, b=8.3622(9) Å, c=5.8755(6) Å, β=90.0012(15) at 120 K) was found at 160 K during cooling. (nyu.edu)
Besides, a conductivity drop, associated with a structural phase transition at about 290 K in LiMn 2 O 4 , progressively disappears by decreasing x, while it is absent in Li-rich samples. (degruyter.com)

For LkCa15, the steep increase toward the star in the 13 CO J = 6−5 transition, in contrast to the J = 2−1 line, shows that the gas is too warm to be traced by the J = 2−1 line and that molecular excitation is important for analyzing the line emission. (mpg.de)

Another example is tin, which transitions from a cubic crystal below 13.2 °C to a tetragonal crystal above that temperature. (wikipedia.org)
The existence of relatively pure tetragonal domains during the phase transition leads to drastic photoluminescence enhancement, which is inhomogeneously distributed across perovskite microcrystals. (lu.se)

What limits the accuracy of ab initio methods in predicting the transition temperature of conventional superconductors? (stackexchange.com)
Temperature-modulated differential scanning calorimetry (TMDSC) is based on conventional DSC but with a sinusoidally modulated temperature path. (psu.edu)

Furthermore, we use the thermochemical code DALI to model the temperature and density structure of a typical transition disk as well as the emitting regions of the CO isotopologs. (mpg.de)
This work demonstrates that knowledge of the gas temperature is important for determining the gas surface density and thus whether planets, and if so what kinds of planets, are most likely to be carving the dust cavities. (mpg.de)

It has a 100 to 50 mix ratio cures at ambient temperatures or more quickly at elevated temperatures. (ien.eu)
We use some of the few existing ALMA observations of the J = 6-5 transition of 13 CO together with archival J = 2−1 data of 12 CO, 13 CO, and C 18 O. The ratio of the 13 CO J = 6−5 to the J = 2−1 transition is used to constrain the temperature and is compared with that found from peak brightness temperatures of optically thick lines. (mpg.de)
Quantitatively, the 6−5/2−1 line ratio constrains the gas temperature in the emitting layers inside the dust cavity to be up to 65 K, warmer than in the outer disk, which is at 20-30 K. For HD 169142, the lines are optically thick, complicating a line ratio analysis. (mpg.de)
Such models also show that a more luminous central star, a lower abundance of polycyclic aromatic hydrocarbons, and the absence of a dusty inner disk increase the temperature of the emitting layers and hence the line ratio in the gas cavity. (mpg.de)

Transition temperature is the temperature at which a material changes from one crystal state (allotrope) to another. (wikipedia.org)
Rev. B 77, 214310 (2008)] have revealed a loss of inversion symmetry in Tb2Ti2O7 at low temperatures which has been suggested as the key reason for this frustrated magnet to remain in spin-liquid state down to 70 mK. (iisc.ac.in)
The temperature at which a substance changes from one state or conformation of matter to another. (nih.gov)

Literature shows a variety of crystal phase transition temperatures and often a spread of the transition over tens of degrees Kelvin. (lu.se)
The liposomes were then exposed for 30 minutes to 60 watt/kilogram (W/kg) CW 100 megahertz or 2.45GHz radiation in-vitro at temperatures from 37 to 43 degrees- C. Liposomes were exposed in HEPES buffer or in HEPES buffer supplemented with 44 percent by volume fetal calf serum (FCS). (cdc.gov)
At temperatures between 39 and 40 degrees-C with the FCS present, characteristic phase transition responses were noted. (cdc.gov)
Similarly, asbestos toxicity, expressed as fibroblast growth inhibition, was inversely related to the asbestos pretreatment temperature in the following manner, 70 degrees C greater than 200 degrees C greater than 400 degrees C = unexposed fibroblast controls. (nih.gov)

Three additional transitions were identified above T ɡ, for modified bloodmeal between 300 and 480 K. These were thought to be transitions of dehydrated bulk amorphous regions, amorphous regions between crystallites and chains segments in crystallites and were also seen at lower temperatures when replacing some water with tri-ethylene glycol (TEG). (waikato.ac.nz)

Keeping up an ideal temperature is exceptionally basic for these services. (transitiontocollege.net)

Shifts in reference temperature are a measure of transition temperature change caused, for example, by metallurgical damage mechanisms. (astm.org)
As plants on land, seaweeds are likely to be susceptible to temperature-mediated changes in phenology such as shifts in their reproductive timing. (frontiersin.org)

We present results from a calculation of the transition temperature in QCD with two light (up, down) and one heavier (strange) quark mass as well as for QCD with three degenerate quark masses. (arxiv-vanity.com)
In order to convert the results for the transition temperature to physical values one needs to set the scale through the calculation of zero temperature observables. (arxiv-vanity.com)

The phonon anomalies can not be understood in terms of spin-phonon and crystal field transition-phonon couplings, thus attributing them to phonon-phonon anharmonic interactions. (iisc.ac.in)

In this study, we used monovalent salts to investigate salt effects on LCLC self-assembly by measuring transition temperatures and order parameters. (aps.org)
The order parameters of LCLCs at transition temperature are reduced by the addition of salts, which cannot be explained by Onsager model. (aps.org)
The roles of temperature, LCLC concentration, and salts are separated when plotting the order parameters as a function of reduced temperature. (aps.org)
An example using a "manual tangent" and "inflection" methods for the "onset" and "transition" parameters in TRIOS is shown in Figure 1. (tainstruments.com)

1.3 Median K Jc values tend to vary with the specimen type at a given test temperature, presumably due to constraint differences among the allowable test specimens in 1.2. (astm.org)
The common experiment to determine T g via DMA is to ramp the temperature of a specimen while applying a small-amplitude linear oscillation to measure the dynamic moduli E', E", and tan(δ). (tainstruments.com)

The rheology of the blend system can be tuned through temperature to easily derive a spectrum of viscosity ratios. (4spe.org)

With this review, we aimed to investigate the importance of temperature on reproductive phenophase transitions (i.e., maturation and release of propagules) of temperate seaweeds while discussing how global warming might affect their reproductive phenology. (frontiersin.org)

Good practice would use all these techniques in parallel to correctly identify relaxation temperatures. (waikato.ac.nz)
These measurements require the use of cryogenic temperatures (77 K or less) to prolong the phase memory relaxation time (T m ) sufficiently to enable detection of a DEER echo curve. (nih.gov)

As the temperature rises, the molecules are able to move more freely and the material gradually starts to soften. (ien.eu)

Along these lines, they ought to have legitimate ventilation, refrigeration framework and stickiness control just as temperature control. (transitiontocollege.net)
Reducing your process times during vacuum drying to an optimum thanks to program-controlled cycles for ventilation and temperature? (memmert.com)

Powder neutron-diffraction experiments [Nature 420, 54 (2002)] have shown that an application of isostatic pressure of about 8.6 GPa in spin-liquid Tb2Ti2O7 induces a long-range magnetic order of the Tb3+ spins coexisting with the spin-liquid phase ascribing this transition to the breakdown of the delicate balance among the various fundamental interactions. (iisc.ac.in)

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