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Topic: Differential scanning calorimetry

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	Differential Scanning Calorimetry - DSC, MDSC, Tzero and Automation (Site not responding. Last check: 2007-10-19)
		DSC measures temperatures and heat flows associated with thermal transitions in a material.
		Traditional DSC gives a single signal which is the sum of all thermal events occuring making it difficult to interpret the data or detect small transitions.
		These improvements result from a new cell design which produces two simultaneous differential measurements and enables the sensors to be individually calibrated for thermal resistance and heat capacitance as a function of temperature.
	www.itscb.com /newsitetest/services/asg/NewDSC.shtml (415 words)

	Differential scanning calorimetry - Wikipedia, the free encyclopedia
		Differential scanning calorimetry (DSC) is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference are measured as a function of temperature.
		A typical differential scanning calorimeter consists of two sealed pans: a sample pan and a reference pan (which is generally an empty sample pan).
		Using DSC, it is possible to observe the small energy changes that occur as matter transitions from a solid to a liquid crystal and from a liquid crystal to an isotropic liquid.
	en.wikipedia.org /wiki/Differential_scanning_calorimetry (1852 words)

	Differential Scanning Calorimetry: 100 % RH Exposure-Suspended hydration and loss of freezable water in cement ...
		The DSC data for the SWVE specimens are shown in Figures 4-6 for the three w/c values.
		Moreover, because the peaks indicate the size of the pores surrounding the reservoirs, the relative humidity corresponds to the equilibrium RH for the smaller pores surrounding the reservoir, and not the equilibrium RH for the reservoir itself, which would be a higher RH.
		An important feature of these DSC results for 100 % RH exposure specimens is the time-dependent behavior of the freezing peak at -30 ºC. This peak forms after the peak at -45 ºC, indicating that the pore throats that freeze at -30 ºC are the result of hydration.
	ciks.cbt.nist.gov /~garbocz/curing/paper/node5.html (784 words)

	TW Lectures \| Revising Scientific Prose (notes) (Site not responding. Last check: 2007-10-19)
		Dynamic differential scanning calorimetry is a relatively new thermal analysis procedure that modulates the temperature ramp of the ordinary differential scanning calorimeter.
		Dynamic differential scanning calorimetry (DDSC) is a relatively new thermal analysis procedure.
		DSC, on one hand, ramps the temperature linearly and requires an initial temperature, a final temperature, and a rate for achieving the final temperature.
	www-unix.oit.umass.edu /~pwtc/tw/lectures/sciprose.html (4140 words)

	calorimetry on Encyclopedia.com (Site not responding. Last check: 2007-10-19)
		CALORIMETRY [calorimetry], measurement of heat and the determination of heat capacity.
		Low-temperature thermal analyses are key to formulation design: electrical resistance, low-temperature scanning calorimetry, and freeze-drying microscopy are three analytical methods that can be used to determine the thermal characterization of a product during processing for intended development of a lyophilization cycle.
		Injection Molding of Poly(Ethylene Terephthalate): Differential Scanning Calorimetry and Confocal Micro-Raman Spectroscopy Investigations of the Skin-Core Morphology [*].
	www.encyclopedia.com /html/c1/calorimtry.asp (485 words)

	[No title]
		DSC, differs fundamentally from DTA in that the sample and reference are both maintained at the temperature predetermined by the programme even during a thermal event in the sample.
		The transition of protein from a native to a denatured conformation is accompanied by the rupture of inter- and intra-molecular bonds, and the process has to occur in a cooperative manner to be discerned by DSC (Ma and Harwalkar, 1991).
		Differential scanning calorimetry studies were carried out on a Setaram microcalorimeter using a sample mass of approx.
	www.friedli.com /research/PhD/DSC/chap3.html (1089 words)

	Materials Research Lab - Modulated Differential Scanning Calorimetry
		Both modulated DSC and DSC measure the difference in heat flow to a sample and to an inert reference.
		Whereas DSC measures heat flow as a function of a constant rate of change in temperature, modulated DSC superimpose a sinusoidal temperature modulation on this rate.
		Typical experimental procedure for an initial modulated DSC experiment include a heating rate from isothermal to 5 °C/min and a modulation amplitude from 0.01 to 10 °C. The modulation period can vary from 10 to 100 seconds or, expressed as a frequency, from 10 to 100 MHz.
	www.mrl.ucsb.edu /mrl/centralfacilities/polymer/ModDSC.html (291 words)

	Differential Scanning Calorimetry ASTM D3417 D3418 E1356 ISO 11357
		Differential Scanning Calorimetry ASTM D3417 D3418 E1356 ISO 11357
		The data can be used to identify materials, differentiate homopolymers from copolymers or to characterize materials for their thermal performance.
		in an aluminum sample pan is placed into the differential scanning calorimeter.
	www.ptli.com /testlopedia/tests/DSC-d3417.asp (255 words)

	DIFFERENTIAL SCANNING CALORIMETRY OF ERYTHROCYTE RECONSTITUTED MEMBRANE
		The thermal properties of biomembranes examined by dífferential calorimetry mimic the properties of bílayers formed from their isolated lipids or from synthetic lipids.
		In this study we have analyzed, by differential scanning calorimetry (DSC), the thermal behaviour of lipids extracted from bovine erythrocyte and of their reconstítuted mixtures.
		DSC was performed on aqueous buffer dispersions (pH 7.4) of the average lipid components but, ín some cases, the sample contained lipids ísolated from one animal.
	users.unimi.it /~monticy/cs071.htm (237 words)

	[No title]
		A differential scanning calorimeter (DSC) measures the differential heat flow required to maintain a sample of a material and an inert reference at the same temperature.
		The partial areas under the single thermogram are utilized to transform the experimental data into degree of conversion and the rate of heat evolution to determine the instantaneous reaction rates.
		Recent studies in kinetic parameter estimation from DSC analsysis suggest modifications to the above procedures to improve the accuracy and applicability of the decomposition equations.
	www.scs.unr.edu /~gotchy/dsc.html (617 words)

	Thermal Porosity Analysis of Croscarmellose Sodium and Sodium Starch Glycolate by Differential Scanning Calorimetry
		The aim of the study was to demonstrate the applicability of differential scanning calorimetry (DSC) on porosity analysis for cellulose and starch.
		are activity of the liquid water at corresponding temperature, partial area under the DSC cooling trace at a temperature where activity of the liquid water present, and total area, respectively.
		To examine frozen or nonfrozen sorbed water for each of the samples, the exotherm (cooling trace) was obtained by DSC study (DSC-7, Perkin Elmer Corp, Norwalk, CT); temperature ranged from 25°C to -50°C at a cooling rate of 10°C/min.
	www.aapspharmscitech.org /view.asp?art=pt040467&pdf=yes (3490 words)

	Differential Scanning Calorimetry (Site not responding. Last check: 2007-10-19)
		Use a differential scanning calorimeter to determine the heat capacity of a solid.
		DSC data is often plotted as “heat flow” vs. temperature or time.
		This is the DSC you will be using in the lab.
	chem.nicholls.edu /pchem/DSCspht.htm (1016 words)

	MicroDifferential Scanning Calorimeter
		Calorimetry is a measurement technique which measures the changes in heat of an isolated system.
		Differential scanning calorimetry (DSC) is a technique in which an approximately linear temperature profile is imposed on an isolated system, while a reaction takes place in one part of the system.
		The differential aspect of the measurement allows only small differences to be amplified, eliminating large common-mode signals, and greatly enhancing the sensitivity.
	www.cstl.nist.gov /div836/836.04/SensorProj/Microcal.html (1212 words)

	Differential Scanning Calorimetry (DSC) and Modulated DSC of Mouthguard Materials (Site not responding. Last check: 2007-10-19)
		Purpose: Employ differential scanning calorimetry (DSC) and modulated DSC to investigate the glass transition temperatures (Tg) and other transformations in these polymers and provide insight into their energy absorption.
		DSC was performed from —80° to 100°C at a heating rate of 10°C/minute to determine the temperature range for transformations in these materials; subsequently, modulated DSC was performed from —10° to 150°C at a heating rate of 3°C/minute (DSC Q100, TA Instruments).
		The heating modulated DSC curves were similar for EVA and ProForm, showing evidence of crystallization after the glass transition followed by a melting peak (onset temperature near 60°C), but the crystallization and melting peaks were much less prominent for Polyshok.
	iadr.confex.com /iadr/2005Balt/techprogram/abstract_60797.htm (361 words)

	Bibliography - General Technique References (Site not responding. Last check: 2007-10-19)
		Chernik G G, "A Differential Scanning Calorimetry Study of a Binary System I: Interpretation of DSC Curves for Isothermal and Nonisothermal Phase Transitions in Binary Systems", Journal of Colloid and Interface Science, 141(2): 400 (1990).
		Differential Scanning Calorimetry", Journal of the Science of Food and Agriculture, 60(2): 255-261 (1992).
		Lepock J R, Frey H E, Rodahl M A, "Thermal Analysis of CHL V79 Cells Using Differential Scanning Calorimetry: Implication for Hyperthermic Cell Killing and the Heat Shock Response", Journal of Cellular Physiology, 137(l):14 (1988).
	www.calscorp.com /Products/general.html (2303 words)

	Differential Scanning Calorimetry (DSC)/ Differential Thermal Analysis (DTA) - Setaram, calorimetry and thermal analysis
		DTA - Differential Thermal Analysis - & DSC - Differential Scanning Calorimetry - measure, respectively, the temperature difference and the heat flow difference between a sample and a reference material (subjected to the same temperature variation in a controlled atmosphere).
		Equipped with the exclusive "3D-Sensor Inside" Technology, the microcalorimeter Micro DSC VII is mainly designed for the study of substances in a confined environment (denaturation, transition, gelification, reaction, etc.) with rising and falling temperatures (no outside cooling system is needed) over a wide temperature range (–45 to 120°C).
		The Nano DSC III is specially designed to determine the thermal stability and heat capacity of proteins and other macromolecules in dilute solution.
	www.setaram.com /Differential-Scanning-Calorimetry-DSC-Differential-Thermal-Analysis-DTA.htm (612 words)

	MS&E 403/404 - Differential Scanning Calorimetry Experiment
		Differential Scanning Calorimetry (DSC) is a convenient and highly accurate method for performing thermal analysis on a wide variety of materials.
		This type of DSC includes two heating discs which are in thermal contact with one another and are isolated from the environment.
		In order to verify the DSC data, the composition should also be measured by a simple secondary method.
	people.ccmr.cornell.edu /~mseugrad/dsclab.html (1337 words)

	Differential scanning calorimetry (DSC)
		DSC is a technique which profiles calorie loss or gain from a substance heated at a constant rate.
		DSC is a method that allows for the determination of the thermal properties of materials.
		The instrument is started and a DSC scan is generated and printed.
	www.nelsonlabs.com /ds100.jsp (100 words)

	Differential Scanning Calorimetry - Acsion
		DSC is a thermal analysis technique that measures the energy absorbed or emitted by a sample as a function of temperature or time.
		When thermal transition occurs in the sample, DSC provides a direct calorimetric measurement of the transition energy at the temperature of the transition.
		DSC is often used to characterize the thermal transitions in polymers such as the glass transition temperature (Tg) and melting point (Tm).
	www.acsion.com /index.cfm?pageID=48 (156 words)

	Differential Scanning Calorimetry (DSC) & Calorimétrie Haute Pression - Setaram, calorimétrie et analyse thermique
		Differential Scanning Calorimetry (DSC) & Calorimétrie Haute Pression - Setaram, calorimétrie et analyse thermique
		Les mesures DSC sous très haute pression sont d'une importance majeure pour la recherche sur les matériaux et leur processus de fabrication, pour l'étude des propriétés PVT,dans différents domaines comme l'énergie (hydrates de gaz), l'alimentaire, les polymères, la sécurité des procédés, etc...
		La mesure DSC sous Très Haute Pression est d'une importance capitale pour la recherche sur les matériaux et sur leur processus de fabrictaion,pour l'étude des propriétés PVT, dans des domaines aussi différents que l'énergie (hydrates de gaz), l'alimentaire, les polymères, la sécurité des procédés, etc...
	www.setaram.fr /Differential-Scanning-Calorimetry-DSC-Calorimetrie-Haute-Pression-fr.htm (404 words)

	Cereal Chem 1998 \| Differential Scanning Calorimetry Glass Transition Temperatures of White Bread and Mold Growth in ... (Site not responding. Last check: 2007-10-19)
		Differential Scanning Calorimetry Glass Transition Temperatures of White Bread and Mold Growth in the Putative Glassy State.
		Differential scanning calorimetry (DSC) was used to determine the onset and end temperatures of the glass transition (T(g)) for white bread equilibrated between 53 and 84% rh.
		After storage, samples of bread (inoculated or not) were spoiled by xerophilic molds, suggesting that T(g), as measured by DSC, cannot be considered as an absolute threshold for mold growth inhibition.
	www.aaccnet.org /cerealchemistry/abstracts/1998/0106-03R.asp (212 words)

	IPS - Differential Scanning Calorimetry (Site not responding. Last check: 2007-10-19)
		In this updated and fully revised second edition, the authors provide the newcomer and the experienced practitioner with a balanced and comprehensive insight into all important methods and aspects of Differential Scanning Calorimetry (DSC), including a sound presentation of the theoretical basis of DSC thermal analysis and temperature-modulated DSC (TMDCS).
		Emphasis is placed on modern evaluation techniques, instrumentation, the underlying measurement principles, metrologically correct calibrations, factors influencing the measurement process, and on the exact interpretation of the results.
		The information enables the research scientist, the analyst and experienced laboratory staff to choose the most suitable equipment, to apply DSC methods successfully, to interpret the measurement curve, and thus to measure key properties precisely.
	www.ips.com.pl /cgi-bin/opisy.cgi?354000467X&S (135 words)

	IMB - IMB Facilities & Resources (Site not responding. Last check: 2007-10-19)
		Differential scanning calorimetry (DSC) is used to obtain thermodynamic parameters associated with heat-induced macromolecular transitions.
		DSC is typically applied to examine stability and domain structure of proteins and nucleic acids, temperature-induced transitions of lipids/membrane systems, and half-life of low molecular weight compounds.
		For example, proteins may be characterized in the context of mutagenesis, providing information on effects of a specific mutation on protein stability, folding intermediates, and oligomerization.
	www.sb.fsu.edu /imb/stures/dsc.html (615 words)

	Differential Scanning Calorimetry
		Differential scanning calorimetry is a technique we use to study what happens to polymers when they're heated.
		This means that the little heater under the sample pan is going to have to put a lot of heat into the polymer in order to both melt the crystals and keep the temperature rising at the same rate as that of the reference pan.
		DSC can also tell us how much of a polymer is crystalline and how much is amorphous.
	www.pslc.ws /macrog/dsc.htm (1913 words)

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