Characterizing the properties of anticancer silibinin and silybin B complexes with UV–Vis, FT-IR, and Raman spectroscopies: A combined experimental and theoretical study

2019 ◽  
Vol 1182 ◽  
pp. 109-118 ◽  
Author(s):  
A. Solís-Gómez ◽  
R.Y. Sato-Berrú ◽  
M.E. Mata-Zamora ◽  
J.M. Saniger ◽  
R.A. Guirado-López
Keyword(s):  
Theoretical Study ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Ir And Raman

scholarly journals Sonochemical-assisted magnesium borate synthesis from different boron sources

2017 ◽  
Vol 19 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Meral Yildirim ◽  
Azmi Seyhun Kipcak ◽  
Emek Moroydor Derun
Keyword(s):  
High Efficiency ◽  
Synthesis Method ◽  
Spectroscopic Studies ◽  
X Ray Diffraction ◽  
Magnesium Borate ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Surface Morphologies ◽  
Ir And Raman ◽  
Good Agreement

Abstract In this study, sonochemical-assisted magnesium borate synthesis is studied from different boron sources. Various reaction parameters are successfully applied by a simple and green method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and Raman spectroscopies are used to characterize the synthesized magnesium borates on the other hand surface morphologies are investigated by using scanning electron microscope (SEM). The XRD analyses showed that the products were admontite [MgO(B2O3)3 · 7(H2O)] with JCPDS (Joint Committee on Powder Diffraction Standards) no. of 01-076-0540 and mcallisterite [Mg2(B6O7(OH)6)2 · 9(H2O)] with JCPDS no. of 01-070-1902. The results that found in the spectroscopic studies were in a good agreement with characteristic magnesium borate bands in both regions of infra-red and visible. According to SEM results, obtained borates were in micro and sub-micro scales. By the use of ultrasonication, reaction yields were found between 84.2 and 97.9%. As a result, it is concluded that the sonochemical approach is a practicable synthesis method to get high efficiency and high crystallinity in the synthesis magnesium borate compounds.

Hydration of L-tyrosine in Aqueous Solution. An FT-IR and Raman Spectroscopic and Theoretical Study

2010 ◽  
Author(s):  
Ana E. Ledesma ◽  
Christian D. Contreras ◽  
Hernán E. Lanús ◽  
Silvia A. Brandán ◽  
P. M. Champion ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Theoretical Study ◽  
Raman Spectroscopic ◽  
Ft Ir ◽  
Ir And Raman

scholarly journals The FT-IR and Raman Spectroscopies as Tools for Biofilm Characterization Created by Cariogenic Streptococci

2020 ◽  
Vol 21 (11) ◽  
pp. 3811 ◽  
Author(s):  
Barbara Gieroba ◽  
Mikolaj Krysa ◽  
Kinga Wojtowicz ◽  
Adrian Wiater ◽  
Małgorzata Pleszczyńska ◽  
...  
Keyword(s):  
Extracellular Polymeric Substances ◽  
Inorganic Ions ◽  
Bacterial Biofilm ◽  
Tooth Decay ◽  
Bacterial Proteins ◽  
Product Characterization ◽  
Complex Microbial Community ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Ir And Raman

Fourier transform infrared (FT-IR) and Raman spectroscopy and mapping were applied to the analysis of biofilms produced by bacteria of the genus Streptococcus. Bacterial biofilm, also called dental plaque, is the main cause of periodontal disease and tooth decay. It consists of a complex microbial community embedded in an extracellular matrix composed of highly hydrated extracellular polymeric substances and is a combination of salivary and bacterial proteins, lipids, polysaccharides, nucleic acids, and inorganic ions. This study confirms the value of Raman and FT-IR spectroscopies in biology, medicine, and pharmacy as effective tools for bacterial product characterization.

scholarly journals Mechanical Properties and Weathering Behavior of Polypropylene-Hemp Shives Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Marcel Ionel Popa ◽  
Silvia Pernevan ◽  
Cecilia Sirghie ◽  
Iuliana Spiridon ◽  
Dorina Chambre ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Degradation ◽  
Accelerated Weathering ◽  
Ir And Raman Spectroscopies ◽  
Before And After ◽  
Ft Ir ◽  
Main Components ◽  
Poly Propylene ◽  
Ir And Raman

This paper presents the obtaining and the characterization of composites with polypropylene matrix and hemp shives as filler in different ratios and containing poly(propylene)-co maleic anhydride (MAH-PP) 3% wt as compatibility agent. The weathering behavior of the composite enclosing 60% hemp shives, performed after the exposure to UV radiations at different exposure times, was evaluated. The changes in the chemical and morphological structures were investigated by FT-IR and RAMAN spectroscopies and AFM microscopy. The mechanical characteristics of the composites were determined before and after an artificial aging process, and they are within the limits of the values reported for polyolefin-based composites and materials with natural fillers. During the accelerated weathering process, the correlation between the chemical degradation of the main components of the composite and the modification of the mechanical properties after the process of aging has been observed.

FT-IR AND RAMAN SPECTROSCOPIC STUDIES OF xAg2O · (100 - x)[B2O3 · As2O3] GLASS SYSTEM

2010 ◽  
Vol 24 (01) ◽  
pp. 51-58 ◽  
Author(s):  
S. C. BAIDOC ◽  
I. ARDELEAN
Keyword(s):  
Ir Spectroscopy ◽  
Structural Changes ◽  
Spectroscopic Studies ◽  
Glass System ◽  
Structural Units ◽  
Raman Spectroscopic ◽  
Ir And Raman Spectroscopies ◽  
Ft Ir ◽  
Ir And Raman ◽  
Ft Ir Spectroscopy

Structural analysis of x Ag 2 O · (100-x)[ B 2 O 3 · As 2 O 3] glass system, with 0 ≤ x ≤ 10 mol%, was performed by means of FT-IR and Raman spectroscopies. The purpose of this work is to investigate the structural changes that appear in the B 2 O 3 · As 2 O 3 glass matrix with the addition and increase of silver ion content. Boroxol rings, pyro-, ortho-, di-, tri-, tetra- and penta-borate groups, structural units characteristic to As 2 O 3 were found in the structure of the studied glasses. FT-IR spectroscopy measurements show that BO 3 units are the main structural units of the glass system. The presence of structural units characteristic to Ag 2 O were not directly evidenced by FT-IR spectroscopy. The Raman analysis leads to similar conclusions as the FT-IR measurements.

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