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  • 1
    Publication Date: 1995-02-01
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
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  • 2
    Publication Date: 1987-08-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1490-1492 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A facility to perform infrared microspectroscopy is under development at the NSLS of Brookhaven National Laboratory. The high brightness infrared light produced as synchrotron radiation makes a nearly ideal source for microspectroscopy. High quality spectra from 10 μm sized areas can be acquired in less than 1 min. A description of the installation, microspectroscopy performance, and an example application are presented. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 328 (1987), S. 837-838 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE is a natural synergism between light microscopy and Fourier transform-infrared (FT-IR) spectroscopy when both are combined. When a microscopist examines a sample, a major goal is to identify the various constituents of the sample. The geometry, colour and optical properties are valuable ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 19-36 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kombination von Thermomikroskopie, DSC, Thermomikrophotometrie (TPM) und Mikro-Fouriertransform-Infrarotspektroskopie (FTIR) ist erforderlich um Polymorphie eindeutig nachzuweisen. Die Notwendigkeit der Anwendung einer Kombination von Techniken wird an Hand der Polymorphic vonp-Hexadecylaminobenzoesäure (HABA), eines pharmazeutischen Zwischenproduktes, illustriert. DSC kann zur Registrierung thermisch ausgelöster Prozesse verwendet werden, es handelt sich aber nicht um eine spezifische Technik, die allein nicht geeignet ist, polymorphe Umlagerungen von anderen mit Enthalpieveränderungen einhergehenden Vorgängen zu unterscheiden. Thermomikroskopie erbringt gewöhnlich die Bestätigung bezüglich der Polymorphie durch direkte Beobachtung der polymorphen Formen und Umwandlungen, aber nicht alle Umwandlungen führen zu visuellen Veränderungen in der Struktur. Mit Thermomikroskopie kombiniert ermöglicht die Mikro-FTIR Aussagen über die Chemie dieser thermischen Veränderungen und liefert spezifische Informationen über Veränderungen in der Molekularstruktur.
    Abstract: Резюме Комбинированные мет оды термомикроскопи и, дифференциальной ск анирующей калориметрии, термом икрофотометрии и микро-инфракрасной ф урые-спектроскопии я вляются ценными для однознач ного определения пол иморфизма. С целью показа необход имости использования таких комбинированных мет одов, представлен полимор физмпгексадецилами нобензойнойпгексадециламинобе нзойной кислоты, как промежут очного фармацевтиче ского препарата. Например, ДСК может ре гистрировать термич ески наведенные процессы, но не является специфической и не мо жет отделить полимор фные превращения от други х процессов, связанны х с изменением энтальп ии. Термомикроскопия обычно подтверждает полимо рфизм прямым наблюдением полимор фных форм и превращен ий, но не все превращения сопрово ждаются визуальным изменени ем структуры. Микро-ин фракрасная фурье-спектроскопия в комбинации с термомикроскопией п одтверждает химию та ких термических изменен ий и представляет бол ее специфическую инфор мацию об изменении мо лекулярной структуры.
    Notes: Abstract The combined techniques of thermomicroscopy, differential scanning calorimetry (DSC), thermomicrophotometry (TMP), and micro-Fourier transform infrared spectroscopy (FTIR) are essential for the unequivocal detection of polymorphism. The polymorphism ofp-hexadecylaminobenzoic acid (HABA), a pharmaceutical intermediate, is presented to illustrate the need to use a multitechnique approach. While DSC can record thermally induced processes, it is not a specific technique and it alone cannot distinguish polymorphic transformations from other events connected with enthalpy changes. Thermomicroscopy usually provides confirmation of polymorphism by direct observation of polymorphic forms and transformations, but not all transformations result in visual changes in structure. Micro-FTIR, combined with thermomicroscopy, confirms the chemistry of these thermal changes and provides more specific information on changes in molecular structure.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 21 (1977), S. 1095-1102 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The variability in adhesive bond strength and extent of cure of room-temperature, amine-cured epoxy resins has limited their applications. This paper reports the observation of microscopic crystal formation at the interface of the resin with air, resulting in a variably lower resin curing rate, extent of cure, and up to ten times lower adhesive bond strength. These crystals were identified as an amine bicarbonate salt, resulting from the reaction of the amine at the surface of the curing mixture with air. The bicarbonate formation seems to be general for the types of hardeners used in room-temperature curing. The amine-bicarbonate compound can be decomposed back to the amine by heating above 80°C. Otherwise, exposure of room-temperature systems to air before bonding is undesirable.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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