Structural Analysis of Nanofilms Using FTIR Spectroscopy. An Introduction to the Spectroscopic Analysis of Nanostructures for Undergraduate Students

2009 ◽  
Vol 86 (6) ◽  
pp. 719 ◽  
Author(s):  
Chad L. Leverette ◽  
Claire Wills ◽  
M. Andrew Perkins ◽  
Stephanie A. Jacobs
Keyword(s):  
Structural Analysis ◽  
Ftir Spectroscopy ◽  
Undergraduate Students ◽  
Spectroscopic Analysis

Key factors in FTIR spectroscopic analysis of DNA: the sampling technique, pretreatment temperature and sample concentration

2018 ◽  
Vol 10 (21) ◽  
pp. 2436-2443 ◽  
Author(s):  
Yahong Han ◽  
Lujia Han ◽  
Yumei Yao ◽  
Yanfei Li ◽  
Xian Liu
Keyword(s):  
Molecular Weight ◽  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Deoxyribonucleic Acid ◽  
Spectroscopic Analysis ◽  
Sampling Technique ◽  
Key Factors ◽  
Sample Concentration ◽  
Pretreatment Temperature ◽  
Molecular Weight Of Dna

Fourier transform infrared (FTIR) spectroscopy has been considered as a powerful tool for analysing the characteristics of deoxyribonucleic acid (DNA) regardless of physical states, sample amounts and the molecular weight of DNA.

scholarly journals Studies on Contributions of FTIR Spectroscopic analysis in the Puriৎication process of Veeram (Hg2Cl2) used in Siddha formulations

2020 ◽  
Vol 11 (SPL4) ◽  
pp. 1251-1259
Author(s):  
Madhavan R ◽  
Muthukumar N J ◽  
Savariraj Sagayam C ◽  
Rajalakshmi P ◽  
Brindha P
Keyword(s):  
Rheumatoid Arthritis ◽  
Ftir Spectroscopy ◽  
Functional Groups ◽  
Spectroscopic Analysis ◽  
Lemon Juice ◽  
Ftir Analysis ◽  
Chemical Formula ◽  
Chemical Changes ◽  
Before And After ◽  
Tender Coconut

In Siddha system Arsenics are called as Paasaanam (toxins). Veeram is one of the paasaanam, its chemical formula is Hg2Cl2 (Calomel). Internally arsenic based medicines are used for rheumatoid arthritis, generalized body pain, syphilis, epilepsy and cancer.Various organic agents are used to purify the veeram such as milk, tender coconut, bitter guard and lemon juice. In this study raw veeram and products obtained after purification were analyzed using FTIR Spectroscopy with a view to understand the need and mechanism of this purification processes. FTIR analysis was carried out before and after purification. Efforts were made to study various chemical changes veeram undergoes during this process. FTIR of the raw Veeram and its processed samples were recorded between 4000-400cm-1. In the study raw drug showed only nine functional groups in the region between 3789.36cm-1 and 468.75cm-1. Bitter gourd treated veeram peaks  were observed in the region between 3526.99 and 476.62cm-1 and a total of 13-peaks were obtained.  Milk treated veeram showed peaks in the region between 3851.10 and 470.39cm-1 and total of 16- peaks were obtained. This method indicated presence of large number of functional groups. Lemon juice treated veeram showed peaks in between 3839.33 and 471.99cm-1  total of 15-peaks were obtained. Tender coconut veeram peaks were observed in between 3877.84 and 477.33cm-1  and total of 15-peaks were obtained. From this data number of functional groups increased in purified samples which indicated that the toxic veeram is not only detoxified but also interacted with functional groups of purifying agents there by therapeutic potency is enhanced.

scholarly journals Structural analysis of proteins by isotope-edited FTIR spectroscopy

2010 ◽  
Vol 24 (1-2) ◽  
pp. 37-43 ◽  
Author(s):  
Suren A. Tatulian
Keyword(s):  
Structural Analysis ◽  
Ftir Spectroscopy ◽  
Structural Changes ◽  
Isotope Labeling ◽  
Structural Information ◽  
Attenuated Total Reflection ◽  
Site Specific ◽  
Segmental Isotope Labeling ◽  
Protein Membrane

Structure determination of multidomain proteins or protein–membrane complexes is one of the most challenging tasks in modern structural biology. High-resolution techniques, like NMR or X-ray crystallography, are limited to molecules of moderate size or those that can be crystallized easily. Both methods encounter serious technical obstacles in structural analysis of protein–membrane systems. This work describes an emerging biophysical technique that combines segmental isotope labeling of proteins with Fourier transform infrared (FTIR) spectroscopy, which provides site-specific structural information on proteins and allows structural characterization of protein–membrane complexes. Labeling of a segment of the protein with13C results in infrared spectral resolution of the labeled and unlabeled parts and thus allows identification of structural changes in specific domains/segments of the protein that accompany functional transitions. Segmental isotope labeling also allows determination of the precise configuration of protein–membrane complexes by polarized attenuated total reflection FTIR (ATR–FTIR) spectroscopy. These new developments offer solutions to functionally important site-specific structural changes in proteins and protein–membrane complexes that are hard to approach using conventional methods.

Sigmosceptrins A - C: New Norditerpenes from a Southern Australian Marine Sponge, Sigmosceptrella sp.

1997 ◽  
Vol 50 (12) ◽  
pp. 1137 ◽  
Author(s):  
Sean Bassett, ◽  
Simon P. B. Ovenden ◽  
Robert W. Gable ◽  
Robert J. Capon
Keyword(s):  
Structural Analysis ◽  
Single Crystal ◽  
Ethyl Ester ◽  
Marine Sponge ◽  
Biosynthetic Pathway ◽  
Spectroscopic Analysis ◽  
Methyl Esters ◽  
Chemical Degradation ◽  
X Ray ◽  
Great Australian Bight

A Sigmosceptrella sp. of sponge collected during trawling operations in the Great Australian Bight, Australia, has yielded a series of new norterpenes. These include a new bisnorditerpene, sigmosceptrin-A (5); two new norditerpenes, sigmosceptrin-B (14) and sigmosceptrin-C (15), isolated as their methyl esters (6) and (7) respectively; and an ethylated artefact, sigmosceptrin-B ethyl ester (8). Complete stereostructures were assigned to the sigmosceptrins by spectroscopic analysis, chemical degradation, derivatization, and by a single-crystal X-ray structural analysis. A biosynthetic pathway is proposed that requires a common biosynthetic precursor to both the sigmosceptrins and norterpene cyclic peroxides.

Structural Analysis of Powder Celluloses by FTIR Spectroscopy

2021 ◽  
Vol 14 (2) ◽  
pp. 288-292
Author(s):  
K. S. Momzyakova ◽  
Z. T. Valishina ◽  
T. R. Deberdeev ◽  
A. A. Aleksandrov ◽  
A. A. Berlin ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Ftir Spectroscopy

Analysis of dentistry cements using FTIR Spectroscopy

2021 ◽  
Vol 11 (4) ◽  
pp. 33-39
Author(s):  
Agata Lada
Keyword(s):  
Ftir Spectroscopy ◽  
Calcium Hydroxide ◽  
Zinc Sulphate ◽  
Spectroscopic Analysis ◽  
Artificial Saliva ◽  
Dental Materials ◽  
Ftir Spectra ◽  
Transmission Technique ◽  
Before And After ◽  
Materials Used

The aim of this study was to evaluate the influence of artificial saliva on dental materials. Dental cements of various compositions and applications were analyzed. Five types of cements were selected for the study: ionomer glass, carboxylic glass and cements used for temporary fillings: zinc-sulphate cement and cement containing calcium hydroxide. Dental materials were prepared in accordance with the manufacturer's instructions. In the first stage, the cements were examined using the transmission technique in the range of 400-4000 cm-1. Dental cements were incubated in saliva at pH 5 for 21 days. After this time, the FTIR spectra for the cements were measured again and placed in artificial saliva. It was found that the FTIR spectra of dentistry cements after contact with artificial saliva differ from those corresponding to the starting materials. Spectroscopic analysis was also performed on saliva before and after incubating dental cements and materials used as temporary fillings. FTIR results indicate that under these conditions changes occur on the surface of dental materials due to their incubation in artificial saliva. The composition of saliva changes after the incubation of dental materials in it. Urea present in artificial saliva is degraded. Carbonates and phosphates are formed on the surface of dental materials. The disappearance of some bands in the spectra of the cements and their appearance in the spectra of the artificial saliva indicates the transfer of some components from the cements to the artificial saliva. The environment of the artificial saliva affects the dental materials. Analogous changes in the spectra of all tested dental materials are observed. These changes are limited to their area.

Multidimensional scaling assisted Fourier-transform infrared spectroscopic analysis of fruit wine samples: introducing a novel analytical approach

2019 ◽  
Vol 11 (32) ◽  
pp. 4106-4115
Author(s):  
Keshav Kumar ◽  
Anja Giehl ◽  
Ralf Schweiggert ◽  
Claus-Dieter Patz
Keyword(s):  
Fourier Transform ◽  
Multidimensional Scaling ◽  
Ftir Spectroscopy ◽  
Analytical Approach ◽  
Spectroscopic Analysis ◽  
Fourier Transform Infrared ◽  
Classification Procedure ◽  
Infrared Spectroscopic Analysis ◽  
Fruit Wine ◽  
Infrared Spectroscopic

The present work introduces a novel classification procedure by combining the multidimensional scaling (MDS) with Fourier transform infrared (FTIR) spectroscopy.

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