Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: Johari-Goldstein relaxation.

Статті в журналах з теми "Johari-Goldstein relaxation"

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся з топ-50 статей у журналах для дослідження на тему "Johari-Goldstein relaxation".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.

1

Thayyil, M. Shahin, S. Capaccioli, D. Prevosto та K. L. Ngai. "Is the Johari-Goldstein β-relaxation universal?" Philosophical Magazine 88, № 33-35 (21 листопада 2008): 4007–13. http://dx.doi.org/10.1080/14786430802270082.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Capaccioli, S., K. L. Ngai та N. Shinyashiki. "The Johari−Goldstein β-Relaxation of Water". Journal of Physical Chemistry B 111, № 28 (липень 2007): 8197–209. http://dx.doi.org/10.1021/jp071857m.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Cicerone, Marcus T., and Madhusudan Tyagi. "Metabasin transitions are Johari-Goldstein relaxation events." Journal of Chemical Physics 146, no. 5 (February 7, 2017): 054502. http://dx.doi.org/10.1063/1.4973935.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

HILFER, R. "ON FRACTIONAL RELAXATION." Fractals 11, supp01 (February 2003): 251–57. http://dx.doi.org/10.1142/s0218348x03001914.

Повний текст джерела
Анотація:
Generalized fractional relaxation equations based on generalized Riemann-Liouville derivatives are combined with a simple short time regularization and solved exactly. The solution involves generalized Mittag-Leffler functions. The associated frequency dependent susceptibilities are related to symmetrically broadened Cole-Cole susceptibilities occurring as Johari Goldstein β-relaxation in many glass formers. The generalized susceptibilities exhibit a high frequency wing and strong minimum enhancement.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Redondo-Foj, Belén, María Jesús Sanchis, Pilar Ortiz-Serna, Marta Carsí, José Miguel García та Félix Clemente García. "The effect of cross-linking on the molecular dynamics of the segmental and β Johari–Goldstein processes in polyvinylpyrrolidone-based copolymers". Soft Matter 11, № 36 (2015): 7171–80. http://dx.doi.org/10.1039/c5sm00714c.

Повний текст джерела
Анотація:
The cross-linking effect on the molecular dynamics of vinylpyrrolidone (VP)/butyl acrylate (BA) copolymers is reflected in the α process, but more significantly in the β Johari–Goldstein (JG) relaxation.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Kaminski, K., E. Kaminska, M. Paluch, J. Ziolo та K. L. Ngai. "The True Johari−Goldstein β-Relaxation of Monosaccharides". Journal of Physical Chemistry B 110, № 49 (грудень 2006): 25045–49. http://dx.doi.org/10.1021/jp064710o.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Massa, Carlo Andrea, Francesco Puosi, and Dino Leporini. "Fractional Coupling of Primary and Johari–Goldstein Relaxations in a Model Polymer." Polymers 14, no. 24 (December 19, 2022): 5560. http://dx.doi.org/10.3390/polym14245560.

Повний текст джерела
Анотація:
A polymer model exhibiting heterogeneous Johari–Goldstein (JG) secondary relaxation is studied by extensive molecular-dynamics simulations of states with different temperature and pressure. Time–temperature–pressure superposition of the primary (segmental) relaxation is evidenced. The time scales of the primary and the JG relaxations are found to be highly correlated according to a power law. The finding agrees with key predictions of the Coupling Model (CM) accounting for the decay in a correlation function due to the relaxation and diffusion of interacting systems. Nonetheless, the exponent of the power law, even if it is found in the range predicted by CM (0<ξ<1), deviates from the expected one. It is suggested that the deviation could depend on the particular relaxation process involved in the correlation function and the heterogeneity of the JG process.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Ngai, K. L., and M. Beiner. "Secondary Relaxation of the Johari−Goldstein Kind in Alkyl Nanodomains." Macromolecules 37, no. 21 (October 2004): 8123–27. http://dx.doi.org/10.1021/ma048645x.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Ngai, K. L., S. Pawlus, K. Grzybowska, K. Kaminski, S. Capaccioli та M. Paluch. "Does the Johari–Goldstein β-Relaxation Exist in Polypropylene Glycols?" Macromolecules 48, № 12 (12 червня 2015): 4151–57. http://dx.doi.org/10.1021/acs.macromol.5b00832.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Goldstein, Martin. "The past, present, and future of the Johari–Goldstein relaxation." Journal of Non-Crystalline Solids 357, no. 2 (January 2011): 249–50. http://dx.doi.org/10.1016/j.jnoncrysol.2010.05.105.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
11

Vij, J. K., and G. Power. "Physical ageing and the Johari–Goldstein relaxation in molecular glasses." Journal of Non-Crystalline Solids 357, no. 3 (February 2011): 783–92. http://dx.doi.org/10.1016/j.jnoncrysol.2010.07.067.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
12

Capaccioli, S., K. Kessairi, M. Shahin Thayyil, D. Prevosto та M. Lucchesi. "The Johari–Goldstein β-relaxation of glass-forming binary mixtures". Journal of Non-Crystalline Solids 357, № 2 (січень 2011): 251–57. http://dx.doi.org/10.1016/j.jnoncrysol.2010.08.007.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
13

Tripodo, Antonio, Francesco Puosi, Marco Malvaldi, Simone Capaccioli, and Dino Leporini. "Coincident Correlation between Vibrational Dynamics and Primary Relaxation of Polymers with Strong or Weak Johari-Goldstein Relaxation." Polymers 12, no. 4 (March 31, 2020): 761. http://dx.doi.org/10.3390/polym12040761.

Повний текст джерела
Анотація:
The correlation between the vibrational dynamics, as sensed by the Debye-Waller factor, and the primary relaxation in the presence of secondary Johari-Goldstein (JG) relaxation, has been investigated through molecular dynamics simulations. Two melts of polymer chains with different bond length, resulting in rather different strength of the JG relaxation are studied. We focus on the bond-orientation correlation function, exhibiting higher JG sensitivity with respect to alternatives provided by torsional autocorrelation function and intermediate scattering function. We find that, even if changing the bond length alters both the strength and the relaxation time of the JG relaxation, it leaves unaffected the correlation between the vibrational dynamics and the primary relaxation. The finding is in harmony with previous studies reporting that numerical models not showing secondary relaxations exhibit striking agreement with experimental data of polymers also where the presence of JG relaxation is known.
Стилі APA, Harvard, Vancouver, ISO та ін.
14

Singh, Abhishek K., and S. S. N. Murthy. "Johari–Goldstein relaxation in orientationally disordered phase of hexa-substituted benzenes." Thermochimica Acta 604 (March 2015): 33–44. http://dx.doi.org/10.1016/j.tca.2015.01.017.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
15

Zhang, M., Y. J. Wang, and L. H. Dai. "Understanding the serrated flow and Johari-Goldstein relaxation of metallic glasses." Journal of Non-Crystalline Solids 444 (July 2016): 23–30. http://dx.doi.org/10.1016/j.jnoncrysol.2016.04.036.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
16

Hu, Lina, and Yuanzheng Yue. "Secondary Relaxation in Metallic Glass Formers: Its Correlation with the Genuine Johari−Goldstein Relaxation." Journal of Physical Chemistry C 113, no. 33 (July 24, 2009): 15001–6. http://dx.doi.org/10.1021/jp903777f.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
17

Schroeder, Maria J., Kia L. Ngai та C. Michael Roland. "The nearly constant loss, Johari-Goldstein β-relaxation, and α-relaxation of 1,4-polybutadiene". Journal of Polymer Science Part B: Polymer Physics 45, № 3 (2006): 342–48. http://dx.doi.org/10.1002/polb.21051.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
18

Power, G., and J. K. Vij. "Johari–Goldstein relaxation and crystallization of sorbitol to ordered and disordered phases." Journal of Chemical Physics 120, no. 11 (March 15, 2004): 5455–62. http://dx.doi.org/10.1063/1.1648015.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
19

Prevosto, D., K. Kessairi, S. Capaccioli, M. Lucchesi, and P. A. Rolla. "Excess wing and Johari–Goldstein relaxation in binary mixtures of glass formers." Philosophical Magazine 87, no. 3-5 (January 21, 2007): 643–50. http://dx.doi.org/10.1080/14786430600986111.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
20

Wang, Z., K. L. Ngai, W. H. Wang та S. Capaccioli. "Coupling of caged molecule dynamics to Johari-Goldstein β-relaxation in metallic glasses". Journal of Applied Physics 119, № 2 (14 січня 2016): 024902. http://dx.doi.org/10.1063/1.4939676.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
21

Zhang, M., Y. Chen, R. G. He, S. F. Guo, J. Ma, and L. H. Dai. "Probing the role of Johari–Goldstein relaxation in the plasticity of metallic glasses." Materials Research Letters 7, no. 9 (May 22, 2019): 383–91. http://dx.doi.org/10.1080/21663831.2019.1620360.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
22

Valenti, Sofia, Luis Javier del Valle, Michela Romanini, Meritxell Mitjana, Jordi Puiggalí, Josep Lluís Tamarit, and Roberto Macovez. "Drug-Biopolymer Dispersions: Morphology- and Temperature- Dependent (Anti)Plasticizer Effect of the Drug and Component-Specific Johari–Goldstein Relaxations." International Journal of Molecular Sciences 23, no. 5 (February 23, 2022): 2456. http://dx.doi.org/10.3390/ijms23052456.

Повний текст джерела
Анотація:
Amorphous molecule-macromolecule mixtures are ubiquitous in polymer technology and are one of the most studied routes for the development of amorphous drug formulations. For these applications it is crucial to understand how the preparation method affects the properties of the mixtures. Here, we employ differential scanning calorimetry and broadband dielectric spectroscopy to investigate dispersions of a small-molecule drug (the Nordazepam anxiolytic) in biodegradable polylactide, both in the form of solvent-cast films and electrospun microfibres. We show that the dispersion of the same small-molecule compound can have opposite (plasticizing or antiplasticizing) effects on the segmental mobility of a biopolymer depending on preparation method, temperature, and polymer enantiomerism. We compare two different chiral forms of the polymer, namely, the enantiomeric pure, semicrystalline L-polymer (PLLA), and a random, fully amorphous copolymer containing both L and D monomers (PDLLA), both of which have lower glass transition temperature (Tg) than the drug. While the drug has a weak antiplasticizing effect on the films, consistent with its higher Tg, we find that it actually acts as a plasticizer for the PLLA microfibres, reducing their Tg by as much as 14 K at 30%-weight drug loading, namely, to a value that is lower than the Tg of fully amorphous films. The structural relaxation time of the samples similarly depends on chemical composition and morphology. Most mixtures displayed a single structural relaxation, as expected for homogeneous samples. In the PLLA microfibres, the presence of crystalline domains increases the structural relaxation time of the amorphous fraction, while the presence of the drug lowers the structural relaxation time of the (partially stretched) chains in the microfibres, increasing chain mobility well above that of the fully amorphous polymer matrix. Even fully amorphous homogeneous mixtures exhibit two distinct Johari–Goldstein relaxation processes, one for each chemical component. Our findings have important implications for the interpretation of the Johari–Goldstein process as well as for the physical stability and mechanical properties of microfibres with small-molecule additives.
Стилі APA, Harvard, Vancouver, ISO та ін.
23

Ngai, K. L., Marian Paluch та Cristian Rodríguez-Tinoco. "Why is the change of the Johari–Goldstein β-relaxation time by densification in ultrastable glass minor?" Physical Chemistry Chemical Physics 20, № 43 (2018): 27342–49. http://dx.doi.org/10.1039/c8cp05107k.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
24

Ngai, K. L., S. Capaccioli, M. Paluch та Limin Wang. "Clarifying the nature of the Johari-Goldstein β-relaxation and emphasising its fundamental importance". Philosophical Magazine 100, № 20 (20 червня 2020): 2596–613. http://dx.doi.org/10.1080/14786435.2020.1781276.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
25

Qiao, Jichao, Riccardo Casalini, and Jean-Marc Pelletier. "Effect of physical aging on Johari-Goldstein relaxation in La-based bulk metallic glass." Journal of Chemical Physics 141, no. 10 (September 14, 2014): 104510. http://dx.doi.org/10.1063/1.4895396.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
26

Yardimci, Hasan, and Robert L. Leheny. "Aging of the Johari-Goldstein relaxation in the glass-forming liquids sorbitol and xylitol." Journal of Chemical Physics 124, no. 21 (June 7, 2006): 214503. http://dx.doi.org/10.1063/1.2197494.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
27

Mandanici, A., and M. Cutroni. "A trace of the Johari–Goldstein relaxation in the mechanical response of supercooled ethylcyclohexane?" Materials Science and Engineering: A 521-522 (September 2009): 279–82. http://dx.doi.org/10.1016/j.msea.2008.09.152.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
28

Ngai, K. L. "Johari–Goldstein relaxation as the origin of the excess wing observed in metallic glasses." Journal of Non-Crystalline Solids 352, no. 5 (May 2006): 404–8. http://dx.doi.org/10.1016/j.jnoncrysol.2006.01.012.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
29

Prevosto, D., S. Capaccioli, M. Lucchesi, P. A. Rolla та K. L. Ngai. "Does the entropy and volume dependence of the structural α-relaxation originate from the Johari–Goldstein β-relaxation?" Journal of Non-Crystalline Solids 355, № 10-12 (травень 2009): 705–11. http://dx.doi.org/10.1016/j.jnoncrysol.2008.09.043.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
30

Schulz, Michael. "Relaxation behavior of a supercooled liquid near the bifurcation of α and Johari-Goldstein processes". Physics Letters A 251, № 4 (січень 1999): 269–72. http://dx.doi.org/10.1016/s0375-9601(99)80002-4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
31

Bhardwaj, Sunny P., and Raj Suryanarayanan. "Subtraction of DC Conductivity and Annealing: Approaches To Identify Johari–Goldstein Relaxation in Amorphous Trehalose." Molecular Pharmaceutics 8, no. 4 (June 30, 2011): 1416–22. http://dx.doi.org/10.1021/mp2000154.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
32

Casalini, R., A. W. Snow, and C. M. Roland. "Temperature Dependence of the Johari–Goldstein Relaxation in Poly(methyl methacrylate) and Poly(thiomethyl methacrylate)." Macromolecules 46, no. 1 (December 18, 2012): 330–34. http://dx.doi.org/10.1021/ma3021322.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
33

Bedrov, Dmitry, and Grant D. Smith. "Secondary Johari–Goldstein relaxation in linear polymer melts represented by a simple bead-necklace model." Journal of Non-Crystalline Solids 357, no. 2 (January 2011): 258–63. http://dx.doi.org/10.1016/j.jnoncrysol.2010.06.043.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
34

Tripodo, Antonio, Francesco Puosi, Marco Malvaldi, and Dino Leporini. "Mutual Information in Molecular and Macromolecular Systems." International Journal of Molecular Sciences 22, no. 17 (September 3, 2021): 9577. http://dx.doi.org/10.3390/ijms22179577.

Повний текст джерела
Анотація:
The relaxation properties of viscous liquids close to their glass transition (GT) have been widely characterised by the statistical tool of time correlation functions. However, the strong influence of ubiquitous non-linearities calls for new, alternative tools of analysis. In this respect, information theory-based observables and, more specifically, mutual information (MI) are gaining increasing interest. Here, we report on novel, deeper insight provided by MI-based analysis of molecular dynamics simulations of molecular and macromolecular glass-formers on two distinct aspects of transport and relaxation close to GT, namely dynamical heterogeneity (DH) and secondary Johari–Goldstein (JG) relaxation processes. In a model molecular liquid with significant DH, MI reveals two populations of particles organised in clusters having either filamentous or compact globular structures that exhibit different mobility and relaxation properties. In a model polymer melt, MI provides clearer evidence of JG secondary relaxation and sharper insight into its DH. It is found that both DH and MI between the orientation and the displacement of the bonds reach (local) maxima at the time scales of the primary and JG secondary relaxation. This suggests that, in (macro)molecular systems, the mechanistic explanation of both DH and relaxation must involve rotation/translation coupling.
Стилі APA, Harvard, Vancouver, ISO та ін.
35

Capaccioli, S., D. Prevosto, M. Lucchesi, P. A. Rolla, R. Casalini та K. L. Ngai. "Identifying the genuine Johari–Goldstein β-relaxation by cooling, compressing, and aging small molecular glass-formers". Journal of Non-Crystalline Solids 351, № 33-36 (вересень 2005): 2643–51. http://dx.doi.org/10.1016/j.jnoncrysol.2005.03.071.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
36

Wu, Xuebang, Lijun Guo та C. S. Liu. "Dynamics of Johari-Goldstein β relaxation and its universal relation to α relaxation in bulk metallic glasses by mechanical spectroscopy". Journal of Applied Physics 115, № 22 (14 червня 2014): 223506. http://dx.doi.org/10.1063/1.4882183.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
37

Kaminska, Ewa, Kamil Kaminski, Marian Paluch, Jerzy Ziolo, and K. L. Ngai. "Additive property of secondary relaxation processes in di-n-octyl and di-isooctyl phthalates: Signature of non-Johari-Goldstein relaxation." Journal of Chemical Physics 126, no. 17 (May 7, 2007): 174501. http://dx.doi.org/10.1063/1.2728903.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
38

Ngai, K. L., J. Habasaki, D. Prevosto, S. Capaccioli та Marian Paluch. "Thermodynamic scaling of α-relaxation time and viscosity stems from the Johari-Goldstein β-relaxation or the primitive relaxation of the coupling model". Journal of Chemical Physics 137, № 3 (21 липня 2012): 034511. http://dx.doi.org/10.1063/1.4736547.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
39

Ngai, K. L., Li-Min Wang та Hai-Bin Yu. "Relating Ultrastable Glass Formation to Enhanced Surface Diffusion via the Johari–Goldstein β-Relaxation in Molecular Glasses". Journal of Physical Chemistry Letters 8, № 12 (7 червня 2017): 2739–44. http://dx.doi.org/10.1021/acs.jpclett.7b01192.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
40

Tuncer, Enis. "Change in dielectric relaxation with the presence of water in highly filled composites." Journal of Advanced Dielectrics 07, no. 05 (October 2017): 1750033. http://dx.doi.org/10.1142/s2010135x17500333.

Повний текст джерела
Анотація:
It is important to determine the dielectric characteristics of semiconductor encapsulation materials based on epoxy resins. We employed the dielectric spectroscopy technique to investigate the dielectric relaxation in the presence of water and how it changes the relaxation. It was observed that the dielectric relaxation of the material was significantly influenced by absorbed water, the local segmental motion (also known as Johari–Goldstein ([Formula: see text]) relaxation) was influenced most by the presence of the water, it was modified by the wet sample compared to dry one, and required high activation energy. The relaxation related to the glass transition was contributed by the cooperative motion (the [Formula: see text]-relaxation) of the epoxy resin system. The [Formula: see text]-relaxation was shifted to a low temperature in the wet sample compared to dry one. The relaxation was modeled with a clear Vogel–Fulcher–Tammann–Hesse (VFTH) behavior; the Vogel temperature of the wet sample was 8[Formula: see text]K lower than the dry sample. The presence of water acts as a plasticizer for the molecular relaxation, and speed-up the cooperative process. The measured data were also used to estimate the electrical properties of the resin system by employing an effective-medium model together with a porous media continuum model by taking into account the physical properties of the system. It is already known that the influence of water in semiconductor packaging is important in sensitive applications. The presented measurements and the analysis method would be appreciated within the semiconductor packaging community to improve material selection and performance evaluation efforts.
Стилі APA, Harvard, Vancouver, ISO та ін.
41

PIGORSCH, C., M. SCHULZ, and S. TRIMPER. "AN ANALYTICAL APPROACH TO THE FREDRICKSON–ANDERSEN MODEL WITH VACANCIES." International Journal of Modern Physics B 13, no. 11 (May 10, 1999): 1379–96. http://dx.doi.org/10.1142/s0217979299001454.

Повний текст джерела
Анотація:
The dynamics of the n-spin facilitated kinetic Ising model (Fredrickson–Andersen model) with mobile vacancies as a model for the glassy materials are studied analytically by means of the Fock-space representation of the master equation. The system is mapped onto a three state model characterizing mobile, immobile and vacant cells. The characteristic cooperativity for glass forming systems are introduced by restrictions influencing the local dynamics and subsequently the local mobility of different lattice cells. In a moderate temperature regime the relaxation time versus the inverse temperature T-1 reveals two processes. Whereas the slow process can be identified with the conventional α-process of the supercooled liquid, the fast one originated by the additional empty sites is suggested to be the β JG -process due to Johari–Goldstein. The results are accordant with numerical simulations and suggest that the modified n-spin facilitated kinetic Ising model is able to describe qualitatively the behaviour of a supercooled liquid near the glass transition temperature T g .
Стилі APA, Harvard, Vancouver, ISO та ін.
42

Ngai, K. L., та Li-Min Wang. "Relations between the Structural α-Relaxation and the Johari–Goldstein β-Relaxation in Two Monohydroxyl Alcohols: 1-Propanol and 5-Methyl-2-hexanol". Journal of Physical Chemistry B 123, № 3 (2 січня 2019): 714–19. http://dx.doi.org/10.1021/acs.jpcb.8b11453.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
43

Kessairi, Khadra, Simone Capaccioli, Daniele Prevosto, Soheil Sharifi та Pierangelo Rolla. "Effect of temperature and pressure on the structural (α-) and the true Johari–Goldstein (β-) relaxation in binary mixtures". Journal of Non-Crystalline Solids 353, № 47-51 (грудень 2007): 4273–77. http://dx.doi.org/10.1016/j.jnoncrysol.2007.01.095.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
44

Ngai, K. L., P. Lunkenheimer, C. León, U. Schneider, R. Brand та A. Loidl. "Nature and properties of the Johari–Goldstein β-relaxation in the equilibrium liquid state of a class of glass-formers". Journal of Chemical Physics 115, № 3 (15 липня 2001): 1405–13. http://dx.doi.org/10.1063/1.1381054.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
45

Kołodziej, Sławomir, Sebastian Pawlus, K. L. Ngai та Marian Paluch. "Verifying the Approximate Coinvariance of the α and Johari–Goldstein β Relaxation Times to Variations of Pressure and Temperature in Polyisoprene". Macromolecules 51, № 12 (4 червня 2018): 4435–43. http://dx.doi.org/10.1021/acs.macromol.8b00811.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
46

Ngai, K. L., J. Habasaki, D. Prevosto, S. Capaccioli та Marian Paluch. "Erratum: “Thermodynamic scaling of α-relaxation time and viscosity stems from the Johari-Goldstein β-relaxation or the primitive relaxation of the coupling model” [J. Chem. Phys. 137, 034511 (2012)]". Journal of Chemical Physics 140, № 1 (7 січня 2014): 019901. http://dx.doi.org/10.1063/1.4860575.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
47

Valenti, Sofia, Claudio Cazorla, Michela Romanini, Josep Tamarit, and Roberto Macovez. "Eutectic Mixture Formation and Relaxation Dynamics of Coamorphous Mixtures of Two Benzodiazepine Drugs." Pharmaceutics 15, no. 1 (January 5, 2023): 196. http://dx.doi.org/10.3390/pharmaceutics15010196.

Повний текст джерела
Анотація:
The formation of coamorphous mixtures of pharmaceuticals is an interesting strategy to improve the solubility and bioavailability of drugs, while at the same time enhancing the kinetic stability of the resulting binary glass and allowing the simultaneous administration of two active principles. In this contribution, we describe kinetically stable amorphous binary mixtures of two commercial active pharmaceutical ingredients, diazepam and nordazepam, of which the latter, besides being administered as a drug on its own, is also the main active metabolite of the other in the human body. We report the eutectic equilibrium-phase diagram of the binary mixture, which is found to be characterized by an experimental eutectic composition of 0.18 molar fraction of nordazepam, with a eutectic melting point of Te = 395.4 ± 1.2 K. The two compounds are barely miscible in the crystalline phase. The mechanically obtained mixtures were melted and supercooled to study the glass-transition and molecular-relaxation dynamics of amorphous mixtures at the corresponding concentration. The glass-transition temperature was always higher than room temperature and varied linearly with composition. The Te was lower than the onset of thermal decomposition of either compound (pure nordazepam decomposes upon melting and pure diazepam well above its melting point), thus implying that the eutectic liquid and glass can be obtained without any degradation of the drugs. The eutectic glass was kinetically stable against crystallization for at least a few months. The relaxation processes of the amorphous mixtures were studied by dielectric spectroscopy, which provided evidence for a single structural (α) relaxation, a single Johari–Goldstein (β) relaxation, and a ring-inversion conformational relaxation of the diazepinic ring, occurring on the same timescale in both drugs. We further characterized both the binary mixtures and pure compounds by FTIR spectroscopy and first-principles density functional theory (DFT) simulations to analyze intermolecular interactions. The DFT calculations confirm the presence of strong attractive forces within the heteromolecular dimer, leading to large dimer interaction energies of the order of −0.1 eV.
Стилі APA, Harvard, Vancouver, ISO та ін.
48

Hensel-Bielówka, S., M. Paluch, and K. L. Ngai. "Emergence of the genuine Johari–Goldstein secondary relaxation in m-fluoroaniline after suppression of hydrogen-bond-induced clusters by elevating temperature and pressure." Journal of Chemical Physics 123, no. 1 (July 2005): 014502. http://dx.doi.org/10.1063/1.1946752.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
49

Yu, Hai-Bin, Ranko Richert, and Konrad Samwer. "Structural rearrangements governing Johari-Goldstein relaxations in metallic glasses." Science Advances 3, no. 11 (November 2017): e1701577. http://dx.doi.org/10.1126/sciadv.1701577.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
50

Capaccioli, S., K. Kessairi, D. Prevosto, M. Lucchesi та K. L. Ngai. "Genuine Johari–Goldstein β-relaxations in glass-forming binary mixtures". Journal of Non-Crystalline Solids 352, № 42-49 (листопад 2006): 4643–48. http://dx.doi.org/10.1016/j.jnoncrysol.2006.01.145.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії