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Journal articles on the topic 'DSC - Differential Scanning Calorimetry'

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Published: 4 June 2021

Last updated: 19 February 2022

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1

Dranca, Ion, and Tudor Lupascu. "Implications of Global and Local Mobility in Amorphous Excipients as Determined by DSC and TM DSC." Chemistry Journal of Moldova 4, no. 2 (December 2009): 105–15. http://dx.doi.org/10.19261/cjm.2009.04(2).02.

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The paper explores the use of differential scanning calorimetry (DSC) and temperature modulated differential scanning calorimetry (TM DSC) to study α- and β- processes in amorphous sucrose and trehalose. The real part of the complex heat capacity is evaluated at the frequencies, f, from 5 to 20mHz. β-relaxations were studied by annealing glassy samples at different temperatures and subsequently heating at different rates in a differential scanning calorimeter.

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2

Chagovetz, Alexis A., Colette Quinn, Neil Damarse, Lee D. Hansen, Alexander M. Chagovetz, and Randy L. Jensen. "Differential Scanning Calorimetry of Gliomas." Neurosurgery 73, no. 2 (April 25, 2013): 289–95. http://dx.doi.org/10.1227/01.neu.0000430296.23799.cd.

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Abstract BACKGROUND: Thermal stability signatures of complex molecular interactions in biological fluids can be measured using differential scanning calorimetry (DSC). Evaluating the thermal stability of plasma proteomes offers a method of producing a disease-specific “signature” (thermogram) in neoplastic and autoimmune diseases. OBJECTIVE: The authors describe the use of DSC with human brain tumor tissue to create unique thermograms for correlation with histological tumor classification. METHODS: Primary brain tumors were classified according to the World Health Organization classification. Tumor samples were digested and assayed by a DSC calorimeter. Experimental thermograms were background subtracted and normalized to the total area of transitions to exclude concentration effects. The resulting thermograms were analyzed by applying 2-state, scaled, Gaussian distributions. RESULTS: Differences in glioma-specific signatures are described by using calculated parameters at transitions that are characterized, in the equilibrium approximation, by a melting temperature (Tm), an apparent enthalpy change (ΔH), and a scaling factor related to the relative abundance of the materials denatured in the transition (Aw). Thermogram signatures of glioblastoma multiforme and low-grade astrocytomas were differentiated by calculated values of Aw3 and Tm4, those of glioblastoma multiforme and oligodendrogliomas were differentiated by Aw2, ΔH2, ΔH4, and Tm4, and those of low-grade astrocytomas and oligodendroglioma were differentiated by Aw4. CONCLUSION: Our preliminary results suggest that solid brain tumors exhibit specific thermogram profiles that are distinguishable among glioma grades. We anticipate that our results will form the conceptual base of a novel diagnostic assay based on tissue thermograms as a complement to currently used histological analysis.

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3

Yang, Lu, and Shun Hong Lin. "City Sludge’s Differential Scanning Calorimetry Analysis." Advanced Materials Research 989-994 (July 2014): 2791–95. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2791.

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The differential scanning calorimetry is a thermal analysis. Under program controlled temperature, measure and input to the relationship between the the sample and the reference’s power difference and temperature. The curve which the differential scanning calorimetry recorded called DSC curve. DSC curve in the sample’s rate of endothermic or exothermic as ordinate and in temperature or time as abscissa, which can determine a variety of thermodynamic and dynamics parameters, such as specific heat capacity, the reaction heat, thermal changes, phase diagram, reaction rate, rate of crystallization, polymer crystallinity, purity of a sample,etc. The method has a wide temperature range-175 ~ 725 °C, high resolution, less samples . This topic utilizes differential scanning calorimetry and had a pyrolysis experimental analysis for urban sludge. Due to the rapid development of technology and analyzer’s constant improvement, and computer technology’s speedy development, DSC plays an increasing role in the sludge treatment field.

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4

Saranov, Igor' Aleksandrovich, Oleg Borisovich Rudakov, Konstantin Konstantinovich Polyansky, Natal'ya Leonidovna Kleymenova, and Aleksey Valer'yevich Vetrov. "DIFFERENTIAL SCANNING CALORIMETRY OF LIQUID VEGETABLE." chemistry of plant raw material, no. 4 (December 21, 2020): 157–64. http://dx.doi.org/10.14258/jcprm.2020047603.

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The thermophysical properties of vegetable oils were studied by differential scanning calorimetry method was used to study the fatty acid composition of vegetable oils liquid at room temperature, such as amaranth (Amaránthus), corn (Zea mays), flax (Línum usitatíssimum), sunflower (Helianthus), rape (Brusss napor), milk thistle (Sílybum mariánum), saffron milk cap (Camelina sativa) and pumpkin (Cucurbita pepo). The temperatures of the endothermic peak maxima and their area on the DSC thermograms of these oils were established as characteristic thermal effects. The interconnection between thermal effects and fatty acid composition are revealed. On the melting curves of liquid vegetable oils, up to 5 endothermic peaks of different intensities were selected in the ranges -80÷-55 °C, -40÷-15 °C, -25÷-8 °C, -19÷+6 °C and -10÷+4 °C. The coordinates of the maxima of these peaks (Ti) and their area (Si) significantly correlate with the content (Wi,%) in the oils, primarily oleic, linoleic and linolenic acids, the total proportion of which in oils is from 75 to 92%. Using the DSC thermograms of rapeseed oil as an example, it is shown that the program separation of DSC peaks allows a multiple increase in the number of analytical signals, an increase in the reliability of identification of the fat phase, and identification of the main fractions of triglycerides. DSC as a method for identifying vegetable oils using modern thermal analysis instruments is simple to sample, has good reproducibility and can be an independent method for identifying and controlling the quality of vegetable oils.

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5

Schick, C. "Differential scanning calorimetry (DSC) of semicrystalline polymers." Analytical and Bioanalytical Chemistry 395, no. 6 (October 14, 2009): 1589–611. http://dx.doi.org/10.1007/s00216-009-3169-y.

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6

Liu, Peng, Cai Qin Gu, Qing Zhu Zeng, and Hao Huai Liu. "The Extrapolation Method for Hyper Differential Scanning Calorimetry." Advanced Materials Research 554-556 (July 2012): 1994–98. http://dx.doi.org/10.4028/www.scientific.net/amr.554-556.1994.

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In order to eliminate the temperature lag effect and obtain the accurate temperature results from hyper differential scanning calorimetry (Hyper-DSC) operated at high heating rate, an adjustable method, namely “Extrapolation Method”, had been introduced by us in former papers. And in this paper, we wanted to support the accuracy of this method by other instruments. Specifically, the extrapolated glass transition temperatures (Tg, 61.5 °C) of PLA film, which was obtained by Hyper-DSC, was close to the value detected directly by normal DSC (62.0 °C). And the extrapolated Tg of waxy starch film (59.7 °C for 8.7% moisture content, and 57.2 °C for 11.2% moisture content) was close to the values detected by modulated temperature DSC (MT-DSC) (63.6 °C and 56.8 °C correspondingly). Consequently, these experimental results support that the “Extrapolation Method” is a feasible way to eliminate temperature lag effect for Hyper-DSC.

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7

Leyva-Porras, César, Pedro Cruz-Alcantar, Vicente Espinosa-Solís, Eduardo Martínez-Guerra, Claudia I. Piñón-Balderrama, Isaac Compean Martínez, and María Z. Saavedra-Leos. "Application of Differential Scanning Calorimetry (DSC) and Modulated Differential Scanning Calorimetry (MDSC) in Food and Drug Industries." Polymers 12, no. 1 (December 18, 2019): 5. http://dx.doi.org/10.3390/polym12010005.

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Phase transition issues in the field of foods and drugs have significantly influenced these industries and consequently attracted the attention of scientists and engineers. The study of thermodynamic parameters such as the glass transition temperature (Tg), melting temperature (Tm), crystallization temperature (Tc), enthalpy (H), and heat capacity (Cp) may provide important information that can be used in the development of new products and improvement of those already in the market. The techniques most commonly employed for characterizing phase transitions are thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), thermomechanical analysis (TMA), and differential scanning calorimetry (DSC). Among these techniques, DSC is preferred because it allows the detection of transitions in a wide range of temperatures (−90 to 550 °C) and ease in the quantitative and qualitative analysis of the transitions. However, the standard DSC still presents some limitations that may reduce the accuracy and precision of measurements. The modulated differential scanning calorimetry (MDSC) has overcome some of these issues by employing sinusoidally modulated heating rates, which are used to determine the heat capacity. Another variant of the MDSC is the supercooling MDSC (SMDSC). SMDSC allows the detection of more complex thermal events such as solid–solid (Ts-s) transitions, liquid–liquid (Tl-l) transitions, and vitrification and devitrification temperatures (Tv and Tdv, respectively), which are typically found at the supercooling temperatures (Tco). The main advantage of MDSC relies on the accurate detection of complex transitions and the possibility of distinguishing reversible events (dependent on the heat capacity) from non-reversible events (dependent on kinetics).

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8

Gao, Jiawu, Lin Li, Yanping Deng, Zongming Gao, Changhua Xu, and Mingxi Zhang. "Study of gelation using differential scanning calorimetry (DSC)." Journal of thermal analysis 49, no. 1 (July 1997): 303–10. http://dx.doi.org/10.1007/bf01987451.

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9

Saranov, I. A., O. B. Rudakov, and K. K. Polansky. "Differential scanning calorimetry of cocoa butter and chocolate glaze." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 2 (September 18, 2020): 154–60. http://dx.doi.org/10.20914/2310-1202-2020-2-154-160.

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Nowadays there is a wide market for cocoa butter equivalents, substitutes and improvers for the confectionery and dairy industries. An urgent task is the development of operational instrumental methods for cocoa butter and its substitutes quality control. Thermophysical parameters are among the most important characteristics of the fat phase for the food technology. Differential scanning calorimetry (DSC) is becoming one of the most promising methods for analytical control of fat and oil products. Thermophysical data (temperatures of the maximums of endothermic peaks and their areas) for cocoa butter and chocolate glaze typical samples applied at dairy processing enterprises of the Central black soil region for the production of chocolate glazed curd bars were obtained in the work performed with its help. DSC data were compared with chromatographic data on triglyceride composition of the fat phase of cocoa butter, cocoa butter equivalents, lauric and non-lauric substitutes, and POP and SOS cocoa butter improvers. It was shown that the DSC method can control the quality of cocoa butter and chocolate glaze, identify chocolate products of different origin and triglyceride composition. Melting thermograms obtained by DSC are highly sensitive to the fat phase triglyceride composition. DSC allows reliable identification of samples of cocoa butter and glaze by melting curves in the temperature range from -100 to +50 ° C. It was found that the main melting peak of cocoa butter and its substitutes, due to the presence of a certain set of triglycerides, is observed in the temperature range from -5 to +30 °C. When examining glazes, the melting peak changes: it bifurcates, expands or narrows. Additional application of computer separation of the unseparated peaks superposition on the DSC melting curves increases the information content of the method and improves the reliability of the fat phase identification. The DSC method is characterized by sample preparation simplicity, has good reproducibility and other metrological characteristics and can be an independent method for fat and oil products identifying and quality control..

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10

Stępień, Piotr, Zbigniew Rusin, and Karol Skowera. "Cement Mortar Porosity by Modified Analysis of Differential Scanning Calorimetry Records." Materials 13, no. 5 (February 28, 2020): 1080. http://dx.doi.org/10.3390/ma13051080.

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A modified method of interpreting a heat flux differential scanning calorimetry records in pore structure determination is presented. The method consists of determining the true phase transition energy distribution due to the melting of water during a differential scanning calorimetry (DSC) heating run. A set of original apparatus functions was developed to approximate the recorded calorimetric signals to the actual processes of the water phase transition at a given temperature. The validity of the proposed calorimetric curves-based algorithm was demonstrated through tests on a cement mortar sample. The correct analysis required taking into account both the thermal inertia of the calorimeter and the thermal effects that are associated with water transitions over the fairly narrow temperature ranges close to 0 °C. When evaluating energy distribution without taking the shifts of the proposed modified algorithm into account, the volume of the pores with radii bigger than 20 nm was greatly overestimated, while that of the smaller pores (rp < 20 nm) was underestimated, in some cases by approximately 70%.

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11

Fellah, Lahcene, and Zakaria Boumerzoug. "DSC Study of Recrystallization in Wiredrawn Industrial Copper." Advanced Materials Research 997 (August 2014): 646–50. http://dx.doi.org/10.4028/www.scientific.net/amr.997.646.

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The goal of this work is to investigate the recrystallization reaction in cold wiredrawn industrial copper. We have used a differential scanning calorimetry and X-ray Diffraction techniques. The stored and apparent activation energies have been determined by differential scanning calorimetry under isochronal conditions. The differential scanning calorimetry results have been analyzed using models developed by Kissinger, Ozawa, Boswell, and Starink. In addition, the transformed fraction, as a function of temperature, and some kinetic parameters have been determined. We have found that cold wiredrawn affects some microstructure proprieties of the material, such the increase of stored and apparent activation energies, and dislocation density after deformation.

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12

Nedelcu, Dumitru, Nicoleta Monica Lohan, Constantin Carausu, and Octavian Pruteanu. "Some Considerations Concerning the Differential Scanning Calorimetry of Ultra Tough Plastic Materials." Applied Mechanics and Materials 659 (October 2014): 107–11. http://dx.doi.org/10.4028/www.scientific.net/amm.659.107.

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The Differential Scanning Calorimetry (DSC) it’s an important analysis in research since the 20thcentury, being used is various fields such as: physics, chemistry, science and materials technology. Its applicability has also extended to other fields, such as nanothermodynamics and bio-thermodynamics. Calorimetry measures the amount of heat absorbed/dissipated by a test sample as compared to a reference value, when the test sample is subjected to a heating and/or cooling cycle. The calorimetric effect may be revealed by the temperature-and/or time-dependent heat flow variation, and its evaluation makes sense when particular heat flow variations, specific to the various transformations accompanying temperature variation, occur. The research described in this paper focuses on the study of calorimetry of ultra tough plastic materials such B4300G4 and B4300G6. The samples were obtained by injection moulding and the planning of the experiments was achieved by means of the Taguchi methodology. The differential scanning calorimetry will show the endothermal and exothermal transformations during which we measured the transformation onset and completion temperatures, as well as the temperature in the middle of the transformation process. Also will be measured the amount of absorbed and dissipated heat, respectively. The DSC diagram showed no temperature-dependent heat flow variation that could suggest a solid state transformation. This paper aims to highlight the behavior of glass transition using DSC analysis, the transformation that occurs during heating of the two polymers obtained using three injection angles: 0o, 45oand 90o.

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13

Yatagai, Mamiko, Motoko Komaki, and Toshimasa Hashimoto. "Applying Differential Scanning Calorimetry to Detergency Studies of Oily Soil." Textile Research Journal 62, no. 2 (February 1992): 101–4. http://dx.doi.org/10.1177/004051759206200207.

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Differential scanning calorimetry (DSC) has been applied to studies of oily soil removal from fibrous materials. Fabric and filter paper were soiled with various oily substances present in sebum. After washing, the fibrous samples were subjected to DSC measurements. The residual oily soils on the samples were analyzed by the melting peak areas of the DSC heating curves, a method that is widely applicable to various oily substances with different melting points and polymorphic forms. Various woven or nonwoven fibrous samples can be scanned, regardless of sample size in washing experiments.

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14

Burmester, A. "Investigation of Paint Media by Differential Scanning Calorimetry (DSC)." Studies in Conservation 37, no. 2 (May 1992): 73. http://dx.doi.org/10.2307/1506399.

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15

Burmester, A. "Investigation of paint media by differential scanning calorimetry (dsc)." Studies in Conservation 37, no. 2 (May 1992): 73–81. http://dx.doi.org/10.1179/sic.1992.37.2.73.

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16

Yatagai, Mamiko, Motoko Komaki, Toshinari Nakajima, and Toshimasa Hashimoto. "Analysis of detergency process by differential scanning calorimetry (DSC)." Sen'i Gakkaishi 45, no. 3 (1989): 102–6. http://dx.doi.org/10.2115/fiber.45.102.

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17

Harvey, Jean-Philippe, Nooshin Saadatkhah, Guillaume Dumont-Vandewinkel, Sarah L. G. Ackermann, and Gregory S. Patience. "Experimental methods in chemical engineering: Differential scanning calorimetry-DSC." Canadian Journal of Chemical Engineering 96, no. 12 (October 31, 2018): 2518–25. http://dx.doi.org/10.1002/cjce.23346.

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18

Lee, Jaesung, and Gönül Kaletunç. "Evaluation of the Heat Inactivation of Escherichia coli and Lactobacillus plantarum by Differential Scanning Calorimetry." Applied and Environmental Microbiology 68, no. 11 (November 2002): 5379–86. http://dx.doi.org/10.1128/aem.68.11.5379-5386.2002.

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ABSTRACT Differential scanning calorimetry (DSC) is used to evaluate the thermal stability and reversibility after heat treatment of transitions associated with various cellular components of Escherichia coli and Lactobacillus plantarum. The reversibility and the change in the thermal stability of individual transitions are evaluated by a second temperature scan after preheating in the DSC to various temperatures between 40 and 130°C. The viability of bacteria after a heat treatment between 55 and 70°C in the DSC is determined by both plate count and calorimetric data. The fractional viability values based on calorimetric and plate count data show a linear relationship. Viability loss and the irreversible change in DSC thermograms of pretreated whole cells are highly correlated between 55 and 70°C. Comparison of DSC scans for isolated ribosomes shows that the thermal stability of E. coli ribosomes is greater than that of L. plantarum ribosomes, consistent with the greater thermal tolerance of E. coli observed from viability loss and DSC scans of whole cells.

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19

Nassu, Renata Tieko, and Lireny Aparecida Guaraldo Gonçalves. "Determination of melting point of vegetable oils and fats by differential scanning calorimetry (DSC) technique." Grasas y Aceites 50, no. 1 (February 28, 1999): 16–21. http://dx.doi.org/10.3989/gya.1999.v50.i1.630.

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20

Chen, Yong Kang, Ming Hua Chen, Tao Zhang, and Xiao Le Wu. "The Application of Differential Scanning Calorimetry to Thermal Analysis for Energetic Materials." Applied Mechanics and Materials 423-426 (September 2013): 588–92. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.588.

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Differential Scanning Calorimetry (DSC) is a common and useful method for thermal analysis. This paper briefly introduces the thermal decomposition characteristic determination of the main components of propellant by DSC assay and the applications of DSC in thermal stability and compatibility evaluation research of energetic materials.

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21

Osten, Julia, Benjamin Milkereit, Michael Reich, Bin Yang, Armin Springer, Karina Nowak, and Olaf Kessler. "Development of Precipitation Hardening Parameters for High Strength Alloy AA 7068." Materials 13, no. 4 (February 19, 2020): 918. http://dx.doi.org/10.3390/ma13040918.

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The mechanical properties after age hardening heat treatment and the kinetics of related phase transformations of high strength AlZnMgCu alloy AA 7068 were investigated. The experimental work includes differential scanning calorimetry (DSC), differential fast scanning calorimetry (DFSC), sophisticated differential dilatometry (DIL), scanning electron microscopy (SEM), as well as hardness and tensile tests. For the kinetic analysis of quench induced precipitation by dilatometry new metrological methods and evaluation procedures were established. Using DSC, dissolution behaviour during heating to solution annealing temperature was investigated. These experiments allowed for identification of the appropriate temperature and duration for the solution heat treatment. Continuous cooling experiments in DSC, DFSC, and DIL determined the kinetics of quench induced precipitation. DSC and DIL revealed several overlapping precipitation reactions. The critical cooling rate for a complete supersaturation of the solid solution has been identified to be 600 to 800 K/s. At slightly subcritical cooling rates quench induced precipitation results in a direct hardening effect resulting in a technological critical cooling rate of about 100 K/s, i.e., the hardness after ageing reaches a saturation level for cooling rates faster than 100 K/s. Maximum yield strength of above 600 MPa and tensile strength of up to 650 MPa were attained.

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22

Gao, Nong. "Applications of Differential Scanning Calorimetry on Materials Subjected by Severe Plastic Deformation." Materials Science Forum 584-586 (June 2008): 255–60. http://dx.doi.org/10.4028/www.scientific.net/msf.584-586.255.

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Differential Scanning Calorimetry (DSC) is a thermal analysis technique that measures the energy absorbed or released by a sample as a function of temperature or time. DSC has wide application for analysis of solid state reactions and solid-liquid reactions in many different materials. In recent years, DSC has been applied to analyze materials and alloys processed through Severe Plastic Deformation (SPD). The basic principle of SPD processing is that a very high strain is introduced into materials which achieve significant grain refinement and improve properties of materials. This review paper presents some recent examples of the applications of DSC for materials subjected to SPD, especially by Equal-Channel Angular Pressing and High-Pressure Torsion.

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23

Zhang, Ru Guo, Hong Zhang, Zheng Zhang, Hua Zheng, Ying Feng, and Wen Wen Zhang. "Characterization of Five Natural Resins and Waxes by Differential Scanning Calorimetry (DSC)." Advanced Materials Research 418-420 (December 2011): 643–50. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.643.

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Thermal properties of 5 natural resin and wax samples (shellac, rosin, shellac wax, beeswax, Chinese insect wax) were examined by differential scanning calorimetry (DSC). The DSC melting and crystallization curves of the samples were presented in this paper. Three DSC parameters, To, Tf and ΔT (difference between To and Tf), were selected from each curve. Evaluation results of the parameters showed that they were statistically significant with individual excellent reproducibility. Information was provided by evaluation of changes among thermal absorption or release peaks of the curves in differentiating the five resins and waxes. It was demonstrated in this paper that DSC is rapid, convenient, reliable and accurate to qualitatively identify the resins and waxes mentioned above.

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Masberg, S., C. Ernst, G. M. Schneider, A. Würflinger, and R. Dąbrowski. "Differential Scanning Calorimetry (DSC) under High Pressure on 10-TPEB." Zeitschrift für Naturforschung A 54, no. 5 (May 1, 1999): 287–90. http://dx.doi.org/10.1515/zna-1999-0503.

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Abstract The phase behaviour of a new liquid crystal, belonging to the series l-[4-n-alkyl-biphenyl]-2-[4-isothio-cyanato-phenyl]ethane (nTPEB), n = 10, has been investigated with differential scanning calorimetry at ambient and high pressure. The phase behaviour depends on the thermal treatment. Phase transition temperatures have been determined as a function of pressure up to 300 MPa. No pressure-induced or pressure-limited phases are observed in this pressure range. Enthalpy-and volume-changes accompanying the phase transitions have been calculated using the Clausius-Clapeyron equation.

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Rahman, M. Shafiur. "State Diagram of Date Flesh Using Differential Scanning Calorimetry (DSC)." International Journal of Food Properties 7, no. 3 (December 31, 2004): 407–28. http://dx.doi.org/10.1081/jfp-200032930.

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Battezzati, L., F. Demichelis, C. F. Pirri, and E. Tresso. "Differential scanning calorimetry (DSC) studies of hydrogenated amorphous semiconductor alloys." Physica B: Condensed Matter 176, no. 1-2 (January 1992): 73–77. http://dx.doi.org/10.1016/0921-4526(92)90599-n.

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Schuch, A., K. Köhler, and H. P. Schuchmann. "Differential scanning calorimetry (DSC) in multiple W/O/W emulsions." Journal of Thermal Analysis and Calorimetry 111, no. 3 (November 9, 2012): 1881–90. http://dx.doi.org/10.1007/s10973-012-2751-2.

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MENG, F., S. SCHRICKER, W. BRANTLEY, D. MENDEL, R. RASHID, H. FIELDSJR, K. VIG, and S. ALAPATI. "Differential scanning calorimetry (DSC) and temperature-modulated DSC study of three mouthguard materials☆." Dental Materials 23, no. 12 (December 2007): 1492–99. http://dx.doi.org/10.1016/j.dental.2007.01.006.

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Drogoń, Agata, Marcin Skotnicki, Agnieszka Skotnicka, and Marek Pyda. "Physical Ageing of Amorphous Indapamide Characterised by Differential Scanning Calorimetry." Pharmaceutics 12, no. 9 (August 25, 2020): 800. http://dx.doi.org/10.3390/pharmaceutics12090800.

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The objective of this study was to characterise amorphous indapamide (IND) subjected to the physical ageing process by differential scanning calorimetry (DSC). The amorphous indapamide was annealed at different temperatures below the glass transition, i.e., 35, 40, 45, 65, 75 and 85 °C for different lengths of time, from 30 min up to a maximum of 32 h. DSC was used to characterise both the crystalline and the freshly prepared glass and to monitor the extent of relaxation at temperatures below the glass transition (Tg). No ageing occurred at 35, 40 and 45 °C at the measured lengths of times. Molecular relaxation time constants (τKWW) for samples aged at 65, 75 and 85 °C were determined by the Kohlrausch-Williams-Watts (KWW) equation. The fragility parameter m (a measure of the stability below the glass transition) was determined from the Tg dependence from the cooling and heating rates, and IND was found to be relatively stable (“moderately fragile”) in the amorphous state. Temperature-modulated DSC was used to separate reversing and nonreversing processes for unaged amorphous IND. The enthalpy relaxation peak was clearly observed as a part of the nonreversing signal. Heat capacities data for unaged and physically aged IND were fitted to Cp baselines of solid and liquid states of IND, were integrated and enthalpy was presented as a function of temperature.

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Sopko, Martin, František Kováč, Ivan Petryshynets, Mária Molnárová, and Petra Gavendová. "Differential Scanning Calorimetry and Metallographic Analysis of Fe-Si Electrical Steel." Materials Science Forum 782 (April 2014): 129–32. http://dx.doi.org/10.4028/www.scientific.net/msf.782.129.

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The microstructure development in cold rolled electrical steel under dynamic heat treatments was subjected to investigation. Significantly distinguish types of microstructures were obtained in the investigated steels confirming the different character of grain boundary motion. Application of annealing temperature within two phase region (austenite+ferrite) leads to abnormal grain growth in silicon steels. Moreover, in the optimum temperature range, there was a particular temperature leading to the most optimal microstructure and texture[1]. The effect of Si content on the phase transition temperature of the electrical steel (0.6, 1, 2.5, 2.9 % Si) was studied by using differential scanning calorimetry (DSC) analysis. The result indicated that DSC analysis could be used to detect the shift temperature of phase transformation in the electrical steel with different Si addition. DSC have been used in thermochemical studies and as complementary to the study of phase transformation. It can be used as a compliment to optical and electron microscopy.

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Harju, Mauno E. E. "Solid-State Transition Mechanisms of Ammonium Nitrate Phases IV, III, and II Investigated by Simultaneous Raman Spectrometry and Differential Scanning Calorimetry." Applied Spectroscopy 47, no. 11 (November 1993): 1926–30. http://dx.doi.org/10.1366/0003702934066127.

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The solid-state transition mechanisms of ammonium nitrate IV, III, and II were studied by measuring samples simultaneously by Raman spectrometry and differential scanning calorimetry (DSC). The Raman instruments were a Fourier transform Raman spectrophotometer and triple monochromator Raman spectrophotometer with charge-coupled-device (CCD) detector. The spectral data of the transitions were collected simultaneously with the calorimetric data in the temperature-scanning mode of the calorimeter and then isothermally between transitions. The phase transition from phase IV to phase III occurred through an intermediate phase II*, whose lifetime was seven minutes maximum when the onset temperature of the reaction was close to the phase-transition IV → II onset temperature. It is concluded that there is always an intermediate phase II* between IV and III. Simultaneous Raman measurements are shown to be an effective tool for interpreting complex DSC curves.

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Bĕhálek, Luboš. "Differential Scanning Calorimetry as a Tool for Quality Testing of Plastics." Key Engineering Materials 669 (October 2015): 485–93. http://dx.doi.org/10.4028/www.scientific.net/kem.669.485.

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Differential scanning calorimetry (DSC) is the most frequently used method from thermal analysis to characterize plastics and which can be applied not only in the R&D but also in the industrial praxis as input and output control. This paper deals with the most important DSC application which arises from results of applied and contractual research at Technical university of Liberec. In the paper are introduced examples of its utilization for plastics identification and characterization, for analysis influence of plastics processing process parameters on their quality, to describe crystallization kinetics and so on.

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Almoselhy, Rania I. M. "Applications of Differential Scanning Calorimetry (DSC) in Oils and Fats Research. A Review." American Research Journal of Agriculture 6, no. 1 (December 22, 2020): 1–9. http://dx.doi.org/10.21694/2378-9018.20002.

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This review is designed to be a comprehensive review in a new way to help you to understand the principle and theory of Thermal Analysis with special emphasis on Differential Scanning Calorimetry (DSC) as a new fast-growing and important technique used for authentication, characterization and detecting adulterations of oils and fats. DSC is a powerful instrument that measures the energy absorbed or released as a function of time or a controlled temperature profile. The sensor of the DSC is the heat flux plate which is designed to give superior performance and rugged reliability. The heat flux plate is capable of measuring small energy changes over the entire temperature range. Examples of measurements with DSC are Oxidative Stability, Melting Enthalpy, Glass Transition, Heat of Crystallization, Purity Determination and Heat Capacity. DSC can be used as a rapid method for assessment of oxidative stability, prediction of shelf life and evaluation of the quality of edible oils during refining. DSC holds a potential to be used as the reliable and reproducible technique for the detection of adulteration of animal body fat added in ghee individually and in combination of vegetable oil. DSC method is faster, require less sample size and no chemicals or solvents compared to other conventional, modern oxidative stability methods and conventional shelf life estimation.

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Romanowska, Jolanta. "Calorimetric study on Bi-Cu-Sn alloys." High Temperature Materials and Processes 38, no. 2019 (February 25, 2019): 541–46. http://dx.doi.org/10.1515/htmp-2019-0052.

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AbstractThe paper presents results of calorimetric investigation of the Bi-Cu-Sn system by means of differential scanning calorimetry (DSC) at the temperature interval 25-1250∘C, Values of liquidus, solidus and invariant reactions temperatures, as well as melting enthalpies of the selected alloys were determined. Microstructure investigation of the alloys were performed by the use of a scanning electron microscope (SEM) equipped with an energy-dispersive spectrometer (EDS).

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Mezbahul-Islam, Mohammad, Elhachmi Essadiqi, and Mamoun Medraj. "A Differential Scanning Calorimetric Study of the Mg-Cu-Y System." Materials Science Forum 706-709 (January 2012): 1215–20. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1215.

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The Mg-Cu-Y system has been experimentally investigated using differential scanning calorimetry (DSC). Vertical sections and phase assemblage diagrams are calculated using thermodynamic modeling. Solidification behavior of the key alloys was discussed in light of the thermodynamic calculation. Melting temperatures of two of the ternary compounds; Mg18CuY and Mg4CuY, are predicted using the modified thermodynamic database of this system. Key words: Mg alloys, Bulk metallic glass, Differential scanning calorimetry, Thermodynamic modeling.

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Cardona-Rodríguez, Yaneth, Diana Alexandra Torres-Sánchez, and Wolfgang Hoffmann. "Análisis térmico de mieles de Trigona (Tetragonisca) angustula de Norte de Santander, Colombia." Respuestas 20, no. 2 (July 1, 2015): 135. http://dx.doi.org/10.22463/0122820x.380.

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ResumenAntecedentes: Las mieles de abejas sin aguijón se utilizan principalmente con fines terapéuticos y medicinales; sin embargo, los estudios relacionados con estas mieles, son escasos y están enfocados en la determinación de algunas de sus características fisicoquímicas y microbianas. Objetivo: En este trabajo, se estudió el comportamiento térmico de mieles de Trigona (Tetragonisca) angustula, provenientes de tres lugares de Norte de Santander (Durania, Granja experimental Villa Marina y Los Patios), mediante calorimetría diferencial de barrido (DSC). Métodos: Se determinó el comportamiento térmico de las muestras de miel (~10 mg), utilizando un equipo SDT-Q600 de TA Instruments, que realiza simultáneamente Análisis Termogravimétrico y Calorimetría Diferencial de Barrido (TGA/DSC). Resultados: Se encontró que las muestras presentan 4 transiciones térmicas, independientemente del sitio de muestreo. Adicionalmente, se encontraron diferencias estadísticamente significativas en las entalpías de dichas transiciones. Conclusión: Las mieles producidas por la especie T. angustula presentan un comportamiento térmico característico, que permite diferenciarlas según su procedencia geográfica.Abstract Background: Honey of stingless bees is used in traditional medicine; nevertheless, studies related to these honeys are scarce and are focused in physicochemical and microbiological properties. Objective: We studied thermal behavior of honeys produced by Trigona (Tetragonisca) angustula, collected from three different places (Durania, Villa Marina and Los Patios), using Differential Scanning Calorimetry (DSC). Methods: We determined thermal behavior of honey samples (~10 mg), using a SDT-Q600, TA Instruments, simultaneous differential scanning calorimetry/thermogravimetric analysis (DSC/TGA). Results: T. angustula honeys exhibited four thermal transitions regardless sampling place. In addition, we found significant differences in the enthalpies of these transitions. Conclusion: Honey produced by T. angustula exhibited a characteristic thermal behavior, that will allow differentiate its geographical origin.Palabras Clave: Análisis térmico, Calorimetría Diferencial de Barrido (DSC), Miel, Trigona (Tetragonisca) angustula.

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Bibi, S., D. H. Bremner, M. Macdougall-Heasman, R. Reid, K. Simpson, A. Tough, S. Waddell, I. J. Stewart, and K. H. Matthews. "A preliminary investigation to group disparate batches of licit and illicit diazepam tablets using differential scanning calorimetry." Analytical Methods 7, no. 20 (2015): 8597–604. http://dx.doi.org/10.1039/c5ay01711d.

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Lv, Jia Yu, Shuiai Wei, Wang Hua Chen, Gu Feng Chen, Li Ping Chen, and Ying Tao Tian. "Thermal Kinetic Analysis of Tert-butyl Peroxybenzoate under Dynamic and Adiabatic Conditions." Advanced Materials Research 550-553 (July 2012): 2782–85. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.2782.

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This study demonstrates the thermal actions of tert-butyl peroxybenzoate (TBPB) which is widely used in the plastic and rubber industries. The thermodynamic and kinetic analysis were performed on the basis of dynamic and adiabatic calorimetric applications which had been accepted as good assistants for investigating materials’ thermal decomposition. In essence, TBPB is reactive and exothermically unstable. Differential scanning calorimetry (DSC) and accelerating rate calorimeter (ARC) were employed to supply basic data and safety index. Experiments were taken under different scanning rates as well as various sample mass. The temperature and pressure curves of TBPB during decomposition were recorded. Based on the significant parameters calculated, self-accelerating decomposition temperature (SADT) of TBPB worked out was 50°C.

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Zhao, Zi Nian, and Xiao Li Lei. "Research in Non-Isothermal Crystallization Kinetics of LDPE Composite Films." Advanced Materials Research 848 (November 2013): 46–49. http://dx.doi.org/10.4028/www.scientific.net/amr.848.46.

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By means of melt blending process in a co-rotating twin screw extruder and blow molding , the low density polyethylene (LDPE)/thermoplastic elastomer(TPE) mixed membranes and LDPE/inorganic particles composite membrane were prepared. by differential scanning calorimetry(DSC) to study the non-isothermal crystallization kinetics of the LDPE composite system by differential scanning calorimetry (DSC).Use modified Jeziorny method to process the data ,the results shows that ZMS, SiO2, EVA and EMAA all play a role of heterogeneous nucleation and the crystallization rate of LDPE has been increased,especially the ZMS/LDPE composite system which heterogeneous nucleation is more obvious and crystallization rate is faster.

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Torres, Kamil, Hanna Trębacz, Andrzej Chrościcki, Łukasz Pietrzyk, and Anna Torres. "Evaluation of peritoneal tissue by means of differential scanning calorimetry (DSC)." Folia Histochemica et Cytobiologica 49, no. 4 (January 16, 2012): 700–705. http://dx.doi.org/10.5603/fhc.2011.0094.

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Miyawaki, Masaaki, Tsuyoshi Sakai, and Hiroaki Konishi. "Evaluation on Oxidative Stability of Lipsticks Using Differential Scanning Calorimetry(DSC)." Journal of Society of Cosmetic Chemists of Japan 32, no. 2 (1998): 186–89. http://dx.doi.org/10.5107/sccj.32.186.

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Degutytė-Fomins, Laima, Rasa Žūkienė, Žaneta Maijorovaitė, Zita Naučienė, and Vida Mildažienė. "Differential scanning calorimetry (DSC) analysis of isolated liver and heart mitochondria." Biologija 54, no. 3 (January 1, 2008): 167–70. http://dx.doi.org/10.2478/v10054-008-0034-4.

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BONNET, MADELEINE, AHMED OUALI, and JEAN KOPP. "Beef muscle osmotic pressure as assessed by differential scanning calorimetry (DSC)." International Journal of Food Science & Technology 27, no. 4 (July 1, 2007): 399–408. http://dx.doi.org/10.1111/j.1365-2621.1992.tb01205.x.

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Schmidt-Naake, Gudrun, and Melanie Stenzel. "Studium der lebenden radikalischen Polymerisation mit der Differential Scanning Calorimetry (DSC)." Die Angewandte Makromolekulare Chemie 254, no. 1 (February 1, 1998): 55–60. http://dx.doi.org/10.1002/(sici)1522-9505(19980201)254:1<55::aid-apmc55>3.0.co;2-f.

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Soutzidou, Maria, Alexandros Panas, and Kyriakos Viras. "Differential scanning calorimetry (DSC) and Raman spectroscopy study of poly(dimethylsiloxane)." Journal of Polymer Science Part B: Polymer Physics 36, no. 15 (November 15, 1998): 2805–10. http://dx.doi.org/10.1002/(sici)1099-0488(19981115)36:15<2805::aid-polb14>3.0.co;2-l.

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Miao, Dagang, Jiangtao Xu, Shouxiang Jiang, Xin Ning, Jie Liu, and Songmin Shang. "Crystallization temperature investigation of Cu2ZnSnS4 by using Differential scanning calorimetry (DSC)." Ceramics International 44, no. 4 (March 2018): 4256–61. http://dx.doi.org/10.1016/j.ceramint.2017.12.006.

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Goodman, M., and B. W. Barry. "DIFFERENTIAL SCANNING CALORIMETRY (DSC) OF HUMAN STRATUM CORNEUM: EFFECT OF AZONE." Journal of Pharmacy and Pharmacology 37, S12 (December 1985): 80P. http://dx.doi.org/10.1111/j.2042-7158.1985.tb14152.x.

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Van-de-Velde, J. G., and J. D. Mitchell. "A new precision-controlled cooling system in Differential Scanning Calorimetry (DSC)." Polimery 38, no. 06 (June 1993): 274–78. http://dx.doi.org/10.14314/polimery.1993.274.

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Herrera, M. L., and M. C. Añón. "Crystalline fractionation of hydrogenated sunflowerseed oil. II. Differential scanning calorimetry (DSC)." Journal of the American Oil Chemists' Society 68, no. 11 (November 1991): 799–803. http://dx.doi.org/10.1007/bf02660590.

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Den Ouden, A. T., J. C. Van Miltenburg, and A. Schuijff. "Direct measurement of the thomson heat by differential scanning calorimetry (DSC)." Thermochimica Acta 124 (February 1988): 329–38. http://dx.doi.org/10.1016/0040-6031(88)87035-7.

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