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Статті в журналах з теми "Infrared spectroscopic studies"

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Автор: Grafiati

Опубліковано: 6 вересня 2023

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1

Ganorkar, Shraddha, and K. R. Priolkar. "Infrared spectroscopic studies of." Solid State Communications 150, no. 41-42 (November 2010): 1963–66. http://dx.doi.org/10.1016/j.ssc.2010.08.031.

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2

Lewis, Lori, Peter Troost, Donald Lavery, and Koichi Nishikida. "Pharmaceutical Polymorphism Studies by Infrared Spectroscopic Imaging." Microscopy and Microanalysis 7, S2 (August 2001): 158–59. http://dx.doi.org/10.1017/s1431927600026866.

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Анотація:

Many drugs are known to crystallize in different polymorphic forms or as solvates. Solubility, melting point, density, hardness, optical properties, vapor pressure, and a host of other physical properties may all vary with polymorphic form. Not only do the various crystal structures of a given pharmaceutical compound affect the efficacy of the drug, but they may also carry enormous legal implications. Much product revenue can depend upon the identification and patent protection of certain polymorphic forms. Thus, the control of crystallization is a very important process parameter, and techniques such as X-ray crystallography, infrared spectroscopy, Raman spectroscopy, and polarized light microscopy are routinely used in the characterization of crystalline drugs.This presentation will involve the investigation of a variety of pharmaceutical polycrystalline films using infrared (IR) spectroscopic imaging. Preliminary data was collected using a conventional FT-IR microscope with visible polarized light capabilities. Correlating data was then collected using a commercially available IR imaging microscope.

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3

Cheng, Cungui, Jia Liu, Hong Wang, and Wei Xiong. "Infrared Spectroscopic Studies of Chinese Medicines." Applied Spectroscopy Reviews 45, no. 3 (May 17, 2010): 165–78. http://dx.doi.org/10.1080/05704920903574256.

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4

Moriya, Keiichi, Tohru Minagawa, and Shinichi Yano. "Infrared spectroscopic studies of thermotropic polyamides." Polymer Bulletin 33, no. 2 (July 1994): 209–13. http://dx.doi.org/10.1007/bf00297357.

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5

Moore, Andrew K., and Noel L. Owen. "INFRARED SPECTROSCOPIC STUDIES OF SOLID WOOD." Applied Spectroscopy Reviews 36, no. 1 (February 4, 2001): 65–86. http://dx.doi.org/10.1081/asr-100103090.

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6

Türker-Kaya, Sevgi, Verena AC Huck-Pezzei, and Christian W. Huck. "Infrared spectroscopic imaging studies of medicinal plants." NIR news 29, no. 4 (March 29, 2018): 9–14. http://dx.doi.org/10.1177/0960336018765592.

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Анотація:

Molecular knowledge about plant constituents and their localization is of interest for basic and applied plant sciences. Mid- and near-infrared imaging techniques have advantages over conventional methods. These technologies offer significant information for the studies on plant classification, physiology, ecology, genetics pathology and other related disciplines. This article aims to present a general perspective about infrared imaging/micro-spectroscopy in plant research.

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7

Kaiser, R. I., and Y. Osamura. "Infrared spectroscopic studies of hydrogenated silicon clusters." Astronomy & Astrophysics 432, no. 2 (March 2005): 559–66. http://dx.doi.org/10.1051/0004-6361:20040305.

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8

Landry, J. M., J. E. Katon, and J. M. Hughes. "Oriented Polycrystalline Films for Infrared Spectroscopic Studies." Applied Spectroscopy 39, no. 2 (March 1985): 273–78. http://dx.doi.org/10.1366/0003702854248980.

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9

Blitz, Jonathan P., Clement R. Yonker, and Richard D. Smith. "Infrared spectroscopic studies of supercritical fluid solutions." Journal of Physical Chemistry 93, no. 18 (September 1989): 6661–65. http://dx.doi.org/10.1021/j100355a019.

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10

Romeo, Melissa, Brian Mohlenhoff, Michael Jennings, and Max Diem. "Infrared micro-spectroscopic studies of epithelial cells." Biochimica et Biophysica Acta (BBA) - Biomembranes 1758, no. 7 (July 2006): 915–22. http://dx.doi.org/10.1016/j.bbamem.2006.05.010.

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11

Boyarskaya, I. A., I. N. Domnin, and S. Kh Akopyan. "Infrared spectroscopic studies of substituted 1,2-diphenylcyclopropenes." Spectrochimica Acta Part A: Molecular Spectroscopy 45, no. 6 (January 1989): 695–96. http://dx.doi.org/10.1016/0584-8539(89)80179-5.

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12

Kandori, Hideki, Yuji Furutani, and Takeshi Murata. "Infrared spectroscopic studies on the V-ATPase." Biochimica et Biophysica Acta (BBA) - Bioenergetics 1847, no. 1 (January 2015): 134–41. http://dx.doi.org/10.1016/j.bbabio.2014.07.020.

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13

Yamada, Kazuhiro, and Yoshinori Funayama. "FTIR Spectroscopic Studies of Miscible Polymer Blends." Rubber Chemistry and Technology 63, no. 5 (November 1, 1990): 669–82. http://dx.doi.org/10.5254/1.3538281.

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Анотація:

Abstract The miscibility of IR and V-BRs with various vinyl contents has been investigated by using DSC and temperature-dependent FTIR spectroscopy, from which we conclude: 1. The glass-transition temperatures of the sequences which relate to the microstructures in IR and V-BRs can be detected by using temperature-dependent FTIR spectroscopy. 2. A miscible polymer blend exhibits a single Tg in DSC thermograms. But, judging from the infrared spectroscopic probe, the IR segments and the V-BR segments do not begin to move at the same temperature. When the data of infrared spectroscopy are compared with those of DSC, it would be possible to conclude that Tg− corresponds to the onset of the segmental movement of IR and then V-BR segments begin to move next, resulting in the broadening of the DSC transition region. 3. This broadening of the DSC transition region originates from the disparity of Tgs between IR and V-BR and may not be necessarily related to the onset of phase separation.

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14

Quaroni, Luca, Katarzyna Pogoda, Joanna Wiltowska-Zuber, and Wojciech M. Kwiatek. "Mid-infrared spectroscopy and microscopy of subcellular structures in eukaryotic cells with atomic force microscopy – infrared spectroscopy." RSC Advances 8, no. 5 (2018): 2786–94. http://dx.doi.org/10.1039/c7ra10240b.

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Atomic force microscopy – infrared (AFM-IR) spectroscopy allows spectroscopic studies in the mid-infrared (mid-IR) spectral region with a spatial resolution better than is allowed by the diffraction limit.

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15

Zhang, Ming, and Terry Moxon. "In situ infrared spectroscopic studies of OH, H2O and CO2 in moganite at high temperatures." European Journal of Mineralogy 24, no. 1 (February 24, 2012): 123–31. http://dx.doi.org/10.1127/0935-1221/2011/0023-2165.

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16

Gharde, Rita A., Santosh A. Mani, P. J. Jessy, Jyoti R. Amare, and Patrick Keller. "Spectroscopic and Thermo–Mechanical Studies of Liquid Crystal Elastomer." Key Engineering Materials 659 (August 2015): 495–99. http://dx.doi.org/10.4028/www.scientific.net/kem.659.495.

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The structure and influence of temperature on mechanical deformation of Liquid Crystal Elastomers (LCEs) were studied using various techniques like Raman Spectroscopy (RS), Fourier Transform Infrared (FTIR) Spectroscopy and Polarizing Microscopy Studies (PMS) etc. The spectroscopic studies confirmed the presence of functional group attached to the sample. The shrinkage in length was observed while heating whereas material returns to its original length on cooling which revealed the correlation of mechanical behavior of Liquid Crystal Elastomers with temperature. This spontaneous shape changing property indicates that LCE material plays an important role in biological applications.

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17

Fang, Guanwen, Xu Kong, Jia-Sheng Huang, and Zhongyang Ma. "IRS spectroscopic studies of ULIRGs at z ~ 2." Proceedings of the International Astronomical Union 8, S295 (August 2012): 82–85. http://dx.doi.org/10.1017/s1743921313004377.

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AbstractWe present a result of IRS spectroscopy of 14 Ultra-Luminous Infrared Galaxies (ULIRGs) in the Extended Groth Strip region. These galaxies are massive and have very high star formation rate. Four objects of this sample are detected in the HST/WFC3 near-infrared imaging. They show very diversified rest-frame optical morphologies, including string-like, extended/diffused, and even spiral with a possible bulge, implying different formation processes for these galaxies. We also search for signatures of active galactic nucleus (AGN) in our sample in the X-ray, mid-infrared and radio bands. This sample is dominated by objects with intensive star formation, only 14–29% of them have AGN activities.

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18

Kloprogge, J. Theo, and Concepcion P. Ponce. "Spectroscopic Studies of Synthetic and Natural Saponites: A Review." Minerals 11, no. 2 (January 23, 2021): 112. http://dx.doi.org/10.3390/min11020112.

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Saponite is a trioctahedral 2:1 smectite with the ideal composition MxMg3AlxSi4−xO10(OH,F)2.nH2O (M = interlayer cation). Both the success of the saponite synthesis and the determination of its applications depends on robust knowledge of the structure and composition of saponite. Among the routine characterization techniques, spectroscopic methods are the most common. This review, thus, provides an overview of various spectroscopic methods to characterize natural and synthetic saponites with focus on the extensive work by one of the authors (JTK). The Infrared (IR) and Raman spectra of natural and synthetic saponites are discussed in detail including the assignment of the observed bands. The crystallization of saponite is discussed based on the changes in the IR and Raman spectra and a possible crystallization model is provided. Infrared emission spectroscopy has been used to study the thermal changes of saponite in situ including the dehydration and (partial) dehydroxylation up to 750 °C. 27Al and 29Si magic-angle-spinning nuclear magnetic resonance spectroscopy is discussed (as well as 11B and 71Ga for B- and Ga-Si substitution) with respect to, in particular, Al(IV)/Al(VI) and Si/Al(IV) ratios. X-ray photoelectron spectroscopy provides chemical information as well as some information related to the local environments of the different elements in the saponite structure as reflected by their binding energies.

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19

Kamitsos, E. I. "Infrared and Resonance Raman Spectroscopic Studies of AgTCNQ." Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics 161, no. 1 (August 1988): 335–46. http://dx.doi.org/10.1080/00268948808070258.

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20

Petruska, E. A., D. V. S. Muthu, S. Carlson, A. M. Krogh Andersen, L. Ouyang, and M. B. Kruger. "High-pressure Raman and infrared spectroscopic studies of." Solid State Communications 150, no. 5-6 (February 2010): 235–39. http://dx.doi.org/10.1016/j.ssc.2009.11.022.

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21

Casal, H. L. "The water content of micelles: infrared spectroscopic studies." Journal of the American Chemical Society 110, no. 15 (July 1988): 5203–5. http://dx.doi.org/10.1021/ja00223a056.

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22

Nour, E. M., L. H. Chen, and J. Laane. "Far-infrared and Raman spectroscopic studies of polyiodides." Journal of Physical Chemistry 90, no. 13 (June 1986): 2841–46. http://dx.doi.org/10.1021/j100404a014.

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23

Kalinkova, G. N., and L. Dimitrova. "Infrared spectroscopic studies of the antibiotic cefamandole nafate." Vibrational Spectroscopy 10, no. 1 (November 1995): 41–47. http://dx.doi.org/10.1016/0924-2031(95)00022-m.

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24

Lee, David C., and Dennis Chapman. "Infrared spectroscopic studies of biomembranes and model membranes." Bioscience Reports 6, no. 3 (March 1, 1986): 235–56. http://dx.doi.org/10.1007/bf01115153.

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25

Moreira, Roberto L., Jéssica I. Viegas, and Anderson Dias. "Raman and infrared spectroscopic studies of LaTaTiO6 polymorphs." Journal of Alloys and Compounds 710 (July 2017): 608–15. http://dx.doi.org/10.1016/j.jallcom.2017.03.291.

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26

Kristiansson, Olof, and Jan Lindgren. "Infrared spectroscopic studies of concentrated aqueous electrolyte solutions." Journal of Physical Chemistry 95, no. 3 (February 1991): 1488–93. http://dx.doi.org/10.1021/j100156a085.

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27

Mishra, Sandeep, Sarvpreet Kaur, S. K. Tripathi, C. G. Mahajan, and G. S. S. Saini. "Fourier-transform infrared spectroscopic studies of dithia tetraphenylporphine." Journal of Chemical Sciences 118, no. 4 (July 2006): 361–69. http://dx.doi.org/10.1007/bf02708531.

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28

Pradhan, A. K., B. K. Choudhary, R. N. P. Choudhary, and B. E. Watts. "Raman scattering and infrared spectroscopic studies of TbAsO4." Journal of Materials Science Letters 7, no. 10 (October 1988): 1094–95. http://dx.doi.org/10.1007/bf00720841.

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29

Senthilkumar, S., M. Briget Mary, and V. Ramakrishnan. "Infrared and Raman spectroscopic studies ofL-valinium picrate." Journal of Raman Spectroscopy 38, no. 3 (2007): 288–94. http://dx.doi.org/10.1002/jrs.1641.

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30

Nada, A. M. A., A. A. Shabaka, M. A. Yousef, and K. N. Abd-El-Nour. "Infrared spectroscopic and dielectric studies of swollen cellulose." Journal of Applied Polymer Science 40, no. 56 (September 5, 1990): 731–39. http://dx.doi.org/10.1002/app.1990.070400510.

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31

Pandiarajan, S., M. Umadevi, M. Briget Mary, R. K. Rajaram, and V. Ramakrishnan. "Infrared and Raman spectroscopic studies ofL-methioninium nitrate." Journal of Raman Spectroscopy 35, no. 11 (2004): 907–13. http://dx.doi.org/10.1002/jrs.1224.

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32

Meyer, Jeffrey D., Shu Jun Bai, Meena Rani, Raj Suryanarayanan, Rajiv Nayar, John F. Carpenter, and Mark C. Manning. "Infrared spectroscopic studies of protein formulations containing glycine." Journal of Pharmaceutical Sciences 93, no. 5 (May 2004): 1359–66. http://dx.doi.org/10.1002/jps.20019.

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33

Glaser, Tobias, Martin Binder, Christian Lennartz, Christian Schildknecht, and Annemarie Pucci. "Infrared spectroscopic growth studies of an organic semiconductor." physica status solidi (a) 208, no. 8 (March 31, 2011): 1873–78. http://dx.doi.org/10.1002/pssa.201026766.

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34

Wilkosz, Natalia, Michał Czaja, Sara Seweryn, Katarzyna Skirlińska-Nosek, Marek Szymonski, Ewelina Lipiec, and Kamila Sofińska. "Molecular Spectroscopic Markers of Abnormal Protein Aggregation." Molecules 25, no. 11 (May 27, 2020): 2498. http://dx.doi.org/10.3390/molecules25112498.

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Анотація:

Abnormal protein aggregation has been intensively studied for over 40 years and broadly discussed in the literature due to its significant role in neurodegenerative diseases etiology. Structural reorganization and conformational changes of the secondary structure upon the aggregation determine aggregation pathways and cytotoxicity of the aggregates, and therefore, numerous analytical techniques are employed for a deep investigation into the secondary structure of abnormal protein aggregates. Molecular spectroscopies, including Raman and infrared ones, are routinely applied in such studies. Recently, the nanoscale spatial resolution of tip-enhanced Raman and infrared nanospectroscopies, as well as the high sensitivity of the surface-enhanced Raman spectroscopy, have brought new insights into our knowledge of abnormal protein aggregation. In this review, we order and summarize all nano- and micro-spectroscopic marker bands related to abnormal aggregation. Each part presents the physical principles of each particular spectroscopic technique listed above and a concise description of all spectral markers detected with these techniques in the spectra of neurodegenerative proteins and their model systems. Finally, a section concerning the application of multivariate data analysis for extraction of the spectral marker bands is included.

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35

Kaczmarek, Katarzyna, Andrzej Leniart, Barbara Lapinska, Slawomira Skrzypek, and Monika Lukomska-Szymanska. "Selected Spectroscopic Techniques for Surface Analysis of Dental Materials: A Narrative Review." Materials 14, no. 10 (May 17, 2021): 2624. http://dx.doi.org/10.3390/ma14102624.

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Анотація:

The presented work focuses on the application of spectroscopic methods, such as Infrared Spectroscopy (IR), Fourier Transform Infrared Spectroscopy (FT-IR), Raman spectroscopy, Ultraviolet and Visible Spectroscopy (UV-Vis), X-ray spectroscopy, and Mass Spectrometry (MS), which are widely employed in the investigation of the surface properties of dental materials. Examples of the research of materials used as tooth fillings, surface preparation in dental prosthetics, cavity preparation methods and fractographic studies of dental implants are also presented. The cited studies show that the above techniques can be valuable tools as they are expanding the research capabilities of materials used in dentistry.

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36

Renugopalakrishnan, V., P. Piazzolla, A. M. Tamburro, and O. P. Lamba. "Structural studies of cucumber mosaic virus: Fourier transform infrared spectroscopic studies." IUBMB Life 46, no. 4 (November 1998): 747–54. http://dx.doi.org/10.1080/15216549800204292.

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37

Munyendo, Leah, Daniel Njoroge, and Bernd Hitzmann. "The Potential of Spectroscopic Techniques in Coffee Analysis—A Review." Processes 10, no. 1 (December 30, 2021): 71. http://dx.doi.org/10.3390/pr10010071.

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Анотація:

This review provides an overview of recent studies on the potential of spectroscopy techniques (mid-infrared, near infrared, Raman, and fluorescence spectroscopy) used in coffee analysis. It specifically covers their applications in coffee roasting supervision, adulterants and defective beans detection, prediction of specialty coffee quality and coffees’ sensory attributes, discrimination of coffee based on variety, species, and geographical origin, and prediction of coffees chemical composition. These are important aspects that significantly affect the overall quality of coffee and consequently its market price and finally quality of the brew. From the reviewed literature, spectroscopic methods could be used to evaluate coffee for different parameters along the production process as evidenced by reported robust prediction models. Nevertheless, some techniques have received little attention including Raman and fluorescence spectroscopy, which should be further studied considering their great potential in providing important information. There is more focus on the use of near infrared spectroscopy; however, few multivariate analysis techniques have been explored. With the growing demand for fast, robust, and accurate analytical methods for coffee quality assessment and its authentication, there are other areas to be studied and the field of coffee spectroscopy provides a vast opportunity for scientific investigation.

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38

Hadden, Jonathan M., Parvez I. Haris, Kaila S. Srai, and Dennis Chapman. "FOURIER TRANSFORM INFRARED SPECTROSCOPIC STUDIES ON HUMAN TRANSFERRIN RECEPTOR." Biochemical Society Transactions 21, no. 2 (May 1, 1993): 75S. http://dx.doi.org/10.1042/bst021075s.

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39

Kumar, Sushil, Seema Gupta, and Harish Chandra. "Electronic and Infrared Spectroscopic Studies of Aggregation of Cholesterol." Spectroscopy Letters 40, no. 4 (May 2007): 583–90. http://dx.doi.org/10.1080/00387010701301188.

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40

SIMON, S., R. GRECU, and V. SIMON. "INFRARED SPECTROSCOPIC STUDIES ON AMORPHOUS AND CRYSTALLINE LANTHANUM ALUMINOBORATES." Modern Physics Letters B 16, no. 08 (April 10, 2002): 291–98. http://dx.doi.org/10.1142/s0217984902003749.

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Анотація:

The development of lanthanum aluminoborate crystalline phase of LaAl 2.03 B 4 O 10.5 (124) composition from the amorphous xerogels prepared by sol-gel technique has been characterized by thermal analysis and infrared spectroscopy. Thermal analysis evidenced continuous weight losses up to 800°C as a result of nitrates decomposition, glycerol combustion and dehydroxylation. The crystallization of amorphous xerogels occurs between 760 and 860°C. The IR data indicate that the local structure dramatically modifies as crystalline phases are developed from the amorphous xerogels. The major changes occur in the boron surrounding where, from the most borons which are three-coordinated in amorphous xerogels, almost only tetra-coordinated species appear in the crystalline samples. While in amorphous xerogels, aluminum occurs as hexa-, penta- and tetra-coordinated by oxygen, in the crystalline samples obtained from lanthanum aluminoborates, amorphous precursors of composition corresponding to 124-lanthanum aluminoborate phase aluminum, it is preponderantly penta- and hexa-coordinated.

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41

Fink, Peter, and Jerzy Datka. "Infrared spectroscopic studies of amination of ZSM-5 zeolites." Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases 85, no. 10 (1989): 3079. http://dx.doi.org/10.1039/f19898503079.

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42

Jackson, Michael, Parvez I. Haris, and Dennis Chapman. "Fourier transform infrared spectroscopic studies of calcium-binding proteins." Biochemistry 30, no. 40 (October 8, 1991): 9681–86. http://dx.doi.org/10.1021/bi00104a016.

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43

Irusta, L., M. L’Abee, J. J. Iruin, and M. J. Fernández-Berridi. "Infrared spectroscopic studies of the urethane/ether inter-association." Vibrational Spectroscopy 27, no. 2 (December 2001): 183–91. http://dx.doi.org/10.1016/s0924-2031(01)00133-3.

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44

Miller, S., D. Rego, N. Achilleos, T. S. Stallard, R. Prangé, M. Dougherty, R. D. Joseph, et al. "Infrared spectroscopic studies of the jovian ionsophere and aurorae." Advances in Space Research 26, no. 10 (January 2000): 1477–88. http://dx.doi.org/10.1016/s0273-1177(00)00081-8.

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45

Radhi, Muhammed Mizher, Emad A. Jaffar Al-Mulla, and Wisam H. Hoiwdy. "Effect of temperature on frying oils: infrared spectroscopic studies." Research on Chemical Intermediates 39, no. 7 (October 5, 2012): 3173–79. http://dx.doi.org/10.1007/s11164-012-0830-4.

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46

Takase, A., and E. Tani. "Infrared and Raman spectroscopic studies of Si3N4-SiC composites." Journal of Materials Science Letters 8, no. 6 (June 1989): 684–86. http://dx.doi.org/10.1007/bf01730442.

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47

Machado, M. A. C., C. W. A. Paschoal, J. Mendes Filho, A. P. Ayala, R. L. Moreira, and J.-Y. Gesland. "Raman and infrared spectroscopic studies of the Li3Na3In2F12fluoride garnet." Journal of Physics: Condensed Matter 14, no. 2 (December 19, 2001): 271–80. http://dx.doi.org/10.1088/0953-8984/14/2/313.

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48

Cassells, J. A., R. Reuss, B. G. Osborne, and I. J. Wesley. "Near Infrared Spectroscopic Studies of Changes in Stored Grain." Journal of Near Infrared Spectroscopy 15, no. 3 (June 2007): 161–67. http://dx.doi.org/10.1255/jnirs.727.

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Анотація:

The potential for near infrared (NIR) spectroscopy to be used to detect quality changes in stored grain was investigated. Wheat, barley and canola were stored at different temperatures and moisture content for a period of 12 months. NIR reflectance spectra of the samples recorded prior to storage were contrasted against the spectra of the samples stored under various conditions by calculating the root mean squares of the point-for-point spectral differences. The ability of NIR to indicate whether there were changes occurring in the grain was determined by the spectral differences being greater than the differences due to repacking. Changes in NIR spectra were low in grain stored at low temperatures and moisture content, but increased in grain stored under more adverse conditions. For wheat and barley stored for 12 months at 30°C and 14% moisture content, spectral contrasts increased to 1294 and 790 microabsorbance units, respectively. Changes in spectral contrast of canola were higher with contrasts of canola stored for 12 months at 30°C and 8% moisture content reaching 2700 microabsorbance units. In order to confirm that the changes seen in the contrast were due to changes in the grain and not due to the drift in the NIR instrument, a stable chemical standard (polyethylene) was used as a control. The results show that spectral differences can be used to monitor the post-harvest maturity of wheat and barley. Spectral changes observed in standard cells containing wheat and barley decreased after six months. The continual high rate of change observed in spectral differences of canola makes it unsuitable for use in standard cells.

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49

Desyatov, I. V., E. A. Paukshtis та A. V. Mashkina. "Infrared spectroscopic studies of H2S adsorption on γ-Al2O3". Reaction Kinetics & Catalysis Letters 41, № 1 (березень 1990): 85–88. http://dx.doi.org/10.1007/bf02075486.

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50

Ishii, M., and M. Saeki. "Raman and Infrared Spectroscopic Studies of Ba3TiS5 and Ba2TiS4." physica status solidi (b) 169, no. 1 (January 1, 1992): K53—K58. http://dx.doi.org/10.1002/pssb.2221690138.

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