scholarly journals Chromatographic and Spectroscopic Identification and Recognition of Natural Dyes, Uncommon Dyestuff Components and Mordants Found in the 16th Century Carpet

2017 ◽  
Author(s):  
Olga Otłowska ◽  
Marek Ślebioda ◽  
Agata Kot-Wasik ◽  
Jakub Karczewski ◽  
Magdalena Śliwka-Kaszyńska
Keyword(s):  
High Performance ◽  
Natural Dyes ◽  
16Th Century ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Definite Structure ◽  
Lac Dye ◽  
Ft Ir ◽  
Spectroscopic Identification ◽  
Historical Samples

A multi-tool analytical practice was used for characterization of 16th century carpet manufactured in Cairo. Mild extraction method with hydrofluoric acid enabled isolation of intact flavonoids and their glycosides, anthraquinones, tannins and indigoids from fibre samples. High-performance liquid chromatography coupled to spectroscopic and mass spectrometric detectors was used for identification of natural dyes present in the historical samples. Weld, young fustic and brazilwood were identified as the dye sources in yellow thread samples. Red fibres have been colored with lac dye, whereas green fibre shades were obtained with indigo and weld. Tannin-containing plant material in combination with indigo and weld were used to obtain brown hue of thread. Four uncommon and thus-far unknown dye components were also found in the historical samples. These compounds probably represent unique fingerprint of dyed threads from this region. Scanning electron microscopy with energy-dispersive X-ray detector (SEM-EDS) and Fourier transformation infrared spectroscopy (FT-IR) were used for identification and characterization of substrates and mordants present in the historical carpet. Carbon and oxygen were detected in large quantities as a part of the wool protein. The presence of aluminum, iron and calcium indicated their usage as mordants. FT-IR analysis showed bands characteristic to woolen fibres and SEM micrographs definite structure of wool.

PREPARATION AND CHARACTERIZATION OF GLYCYRRHETINIC ACID-MODIFIED POLOXAMER 188/CHITOSAN NANOPARTICLES

NANO ◽  
2013 ◽  
Vol 08 (04) ◽  
pp. 1350042 ◽  
Author(s):  
JING WANG ◽  
LI GUO ◽  
LI FANG MA
Keyword(s):  
High Performance ◽  
Drug Loading ◽  
Chitosan Nanoparticles ◽  
Spherical Shape ◽  
Glycyrrhetinic Acid ◽  
Poloxamer 188 ◽  
H Nmr ◽  
Ft Ir

In this paper, we firstly synthesized glycyrrhetinic acid-modified double amino-terminated poloxamer 188 (GA–NH–POLO–NH–GA). The structure of the synthesized compound was confirmed by 1H-NMR and Fourier transform infrared (FT-IR) spectroscopy. Then the nanoparticles composed of GA–NH–POLO–NH–GA/chitosan (GA–NH–POLO–NH–GA/CTS) were prepared by an ionic gelation process. The characterization of the nanoparticles was measured by dynamic light scattering (DLS) and scanning electron microscope (SEM). The results showed that the nanoparticles were well dispersed with a spherical shape and the particle size was distributed between 100 nm and 300 nm. The cytotoxicity based on MTT assay against cells (QGY-7703 cells and L929 cells) showed that the nanoparticles had low toxicity and good biocompatibility. The encapsulation efficiency and drug loading of 5-fluorouracil-loaded nanoparticles (5-FU nanoparticles) were measured by high-performance liquid chromatography (HPLC) and fluorescence spectroscopy, ultraviolet-visible (UV-vis) absorbance. The encapsulation of 5-Fu-loaded CTS nanoparticles was 12.8% and the drug loading was 2.9%, while the encapsulation of 5-Fu-loaded GA–NH–POLO–NH–GA/CTS nanoparticles was 20.9% and the drug loading was 3.36%. The release profile showed that the GA–NH–POLO–NH–GA/CTS nanoparticles were available for sustained release of 5-Fu. The GA–NH–POLO–NH–GA/CTS nanoparticles have a higher affinity to the QGY-7703 cells, so indicated that the GA–NH–POLO–NH–GA/CTS nanoparticles have the capacity of liver-targeting in vitro.

scholarly journals Natural Dyes from Mortiño (Vaccinium floribundum) as Sensitizers in Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 785 ◽  
Author(s):  
Miguel A. Taco-Ugsha ◽  
Cristian P. Santacruz ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
High Performance Liquid Chromatography ◽  
Solar Cells ◽  
Liquid Chromatography ◽  
Solar Cell ◽  
High Performance ◽  
Power Conversion ◽  
Natural Dyes ◽  
The Cost ◽  
Layer Chromatography

Photovoltaic energy presents environmental advantages; however, these advantages are limited by the cost of manufacturing solar cells and in many cases, scarce or dangerous materials are incorporated. Therefore, the use of natural dyes from mortiño (Vaccinium floribundum) as sensitizers in solar cells is proposed. The dyes were extracted by maceration in acidified methanol (HCl, citric acid and trifluoroacetic acid TFA) and were characterized by High-Performance Liquid Chromatography (HPLC), Thin-Layer Chromatography (TLC) and spectrometric methods (UV-Vis, IR and MS-MALDI). The construction and characterization of cells were in standard conditions. The study confirms that pigments in mortiño are flavonoids of the anthocyanidin group as: cyanidin-3-galactoside, and cyanidin-3-arabinoside. The efficiency of solar cells was between 0.18–0.26%; the extraction with TFA in methanol leads to the best performance. Although they have low power conversion efficiency, mortiño dyes could be an alternative to artificial sensitizers for solar cell technologies because they are harmless and abundant substances.

scholarly journals LC-MS and FT-IR characterization of amber artifacts

2012 ◽  
Vol 10 (6) ◽  
pp. 1882-1889 ◽  
Author(s):  
Georgiana Truică ◽  
Eugenia Teodor ◽  
Simona Litescu ◽  
Gabriel Radu
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Fourier Transform ◽  
Liquid Chromatography ◽  
Infrared Spectroscopy ◽  
Analytical Methods ◽  
High Performance ◽  
Archaeological Sites ◽  
Ft Ir

AbstractThis work focuses on using analytical methods, such as Fourier transform Infrared spectroscopy (FTIR) and high performance liquid chromatography (HPLC) with mass spectrometry (MS) detection to assess archaeological and geological amber. The main goal of this study is to apply the previously developed and optimized analytical methods in verifying criteria to ascribe and characterize the origin of materials found in archaeological sites. The proposed LC-MS method was successfully applied for the quantification of succinic acid content both in geological and archaeological samples of amber and offers excellent linearity between 0.1 and 5µg mL−1. The developed FTIR method provided some criteria which is able to differentiate between Baltic and Romanian amber (Romanite) that furthermore validates on archaeological amber artefacts.

scholarly journals Synthesis and Characterization of Graphene Oxide Derivatives via Functionalization Reaction with Hexamethylene Diisocyanate

Proceedings ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 8 ◽  
Author(s):  
José A. Luceño-Sánchez ◽  
Georgiana Maties ◽  
Camino Gonzalez-Arellano ◽  
Ana M. Díez-Pascual
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Organic Molecules ◽  
Hexamethylene Diisocyanate ◽  
Reaction Conditions ◽  
Ft Ir ◽  
Oxygen Groups ◽  
Functionalization Reaction ◽  
Ft Ir Spectroscopy

Graphene oxide (GO), the oxidized form of graphene, shows unique properties, such as strong mechanical strength, high thermal conductivity, amphiphilicity, and surface functionalization capability that make it very attractive in various fields, ranging from medicine to optoelectronic devices and solar cells. However, its insolubility in non-polar and polar aprotic solvents hinders some applications. To solve this issue, novel functionalization strategies are pursued. In this regard, the current study deals with the preparation and characterization of hexamethylene diisocyanate (HDI)-functionalized GO. Different reaction conditions were tested to optimize the functionalization degree (FD), and detailed characterization was conducted via Fourier-transformed infrared (FT-IR) spectroscopy to confirm the success of the functionalization reaction. The HDI-GO could further react with other organic molecules or polymers via the remaining oxygen groups, which makes them ideal candidates as nanofillers for high-performance GO-based polymer nanocomposites.

scholarly journals Fabrication and characterization of Zn doped CuO nanofiber using newly designed nanofiber generator for the photodegradation of methylene blue from textile effluent

2018 ◽  
Vol 36 (3) ◽  
pp. 520-529 ◽  
Author(s):  
Ramasamy Gopalsamy Sethuraman ◽  
Thangamuthu Venkatachalam ◽  
Selvaraj Dinesh Kirupha
Keyword(s):  
Methylene Blue ◽  
Copper Oxide ◽  
Copper Acetate ◽  
Average Crystallite Size ◽  
Blue Shift ◽  
X Ray Diffraction ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Ft Ir ◽  
The Stability

AbstractHigh aspect ratio, Zn doped copper oxide (Zn-CuO) nanofibers have been fabricated employing a newly designed electrospun coating unit using copper acetate, sodium hydroxide and polyethylene glycol in aqueous state. The prepared Zn doped copper oxide (Zn-CuO) nanofibers were sintered at 400 °C, 500 °C and 600 °C separately and characterized using X-ray diffraction XRD, Fourier transformation infrared spectroscopy FT-IR, scanning electron microscopy SEM, energy dispersive spectroscopy EDS. The average crystallite size was in the range of 28 nm to 30 nm. Optical properties of Zn-CuO nanofibers were analyzed using UV-DRS studies which showed a blue shift in the absorption band. An increase in band gap with the increase in postannealing temperature was observed due to the blue shift in absorption edge of CuO causing enhanced photodegradation. The catalytic properties of the CuO nanofibers were tested using methylene blue in aqueous medium. The influences of parameters responsible for high photodegradation were optimized and the rate of the photodegradation process was calculated using photodegradation kinetics. The reusability test was conducted to find the stability of the fabricated Zn-CuO nanofibers.

scholarly journals Novel Synthesis of N-Acetylcysteine Medicine Using an Effective Method

Molbank ◽  
10.3390/m1288 ◽  
2021 ◽  
Vol 2021 (4) ◽  
pp. M1288
Author(s):  
Farzaneh Ziaee ◽  
Mohammad Ziaee
Keyword(s):  
High Performance ◽  
Proton Nuclear Magnetic Resonance ◽  
High Yield ◽  
Multi Stage ◽  
Ft Ir ◽  
Stage Process ◽  
Antioxidant Supplement ◽  
High Level ◽  
Single Batch

N-acetylcysteine (NAC) is mainly administrated as a mucolytic medication, antioxidant supplement, antidote in paracetamol overdose, and a drug for the prevention of diabetic kidney disease. Its effect has been investigated for the treatment of several diseases such as COVID-19. In this work, an effective method for high-yield synthesis of N-acetylcysteine is proposed. This drug can be synthesized in a single-batch step instead of using a multi-stage process. The proposed method has shown the potential to be considered as an alternative method for producing NAC. The purification process was carried out using suitable solvents to reach a high level of purity. The characterization of the synthesized drug was undertaken through Elemental analysis, Proton Nuclear Magnetic Resonance (1H NMR), High Performance Liquid Chromatography (HPLC), Fourier Transform Infrared Spectroscopy (FT-IR), and melting point analyses.

Preparation and Characterization of PA6-PEG/Li High Performance Static Dissipation Composites

2017 ◽  
Vol 70 (6) ◽  
pp. 669
Author(s):  
Chongling Yang ◽  
Shouzai Tan ◽  
Gengen Chen ◽  
Litao Guan
Keyword(s):  
High Performance ◽  
Condensation Reaction ◽  
Polyamide 6 ◽  
Decomposition Temperature ◽  
Reaction Conditions ◽  
Comprehensive Properties ◽  
Ft Ir ◽  
Optimal Reaction ◽  
Resistivity Testing

A copolymer of PA6 (polyamide 6) and PEG (polyethylene glycol) was synthesized by a condensation reaction. The optimal reaction conditions were determined as the following: a reaction temperature of 255°C, –0.04 MPa vacuum, and a condensation time of 40 min. A series of novel PA6-PEG/Li composites were developed by melt blending the PA6-PEG copolymer (10 wt-% PEG) with three different kinds of colourless lithium salts (LiCl, C18H35LiO2, LiAc). FT-IR, NMR, thermogravimetric (TGA), electronic universal testing, and resistivity analyses were employed to investigate the comprehensive properties of the copolymers and composites. The results of FT-IR and 1H NMR analyses revealed that the PEG was copolymerized with PA6 successfully. TGA results indicated that the decomposition temperature of the PA6-PEG copolymer was above 350°C. Resistivity testing revealed that the surface resistivity (Rs) of the copolymer decreased from 1 × 1014 to 5.67 × 109 Ω square–1 with an increase of the content of PEG. The PA6-PEG/LiCl composite showed an excellent static dissipation performance of 2.71 × 108 Ω square–1.

Preparation and Characterization of Magnesium Borate Whisker

2013 ◽  
Vol 662 ◽  
pp. 481-484
Author(s):  
Zhi Liang Jin ◽  
Xu Jing ◽  
Yuan Hong ◽  
Xue Ying Nai ◽  
Li Wu
Keyword(s):  
Reaction Time ◽  
Molten Salt ◽  
Reaction Temperature ◽  
High Performance ◽  
Raw Materials ◽  
Price Ratio ◽  
Magnesium Borate ◽  
Synthesis Conditions ◽  
Ft Ir

Being a new whisker products with high performance to price ratio, magnesium borate whiskers with a length of 10 - 50μm and a diameter of 0.5 - 2μm were prepared by molten salt and characterized by XRD, FT - IR, SEM and chemical titration. The experiments show that the synthesis conditions are as follows: raw materials ratio: Mg:B:flux =1:11.05:1-3.5(mol); reaction temperature: 800 - 950°C;reaction time:6 - 10hours; flux: NaCl、KCl or NaOH.

scholarly journals Chromatographic and Spectroscopic Identification and Recognition of Natural Dyes, Uncommon Dyestuff Components, and Mordants: Case Study of a 16th Century Carpet with Chintamani Motifs

Molecules ◽  
2018 ◽  
Vol 23 (2) ◽  
pp. 339 ◽  
Author(s):  
Olga Otłowska ◽  
Marek Ślebioda ◽  
Agata Kot-Wasik ◽  
Jakub Karczewski ◽  
Magdalena Śliwka-Kaszyńska
Keyword(s):  
Natural Dyes ◽  
16Th Century ◽  
Spectroscopic Identification

scholarly journals Phenotypic Characterization of Shewanella oneidensis MR-1 under Aerobic and Anaerobic Growth Conditions by Using Fourier Transform Infrared Spectroscopy and High-Performance Liquid Chromatography Analyses

2010 ◽  
Vol 76 (18) ◽  
pp. 6266-6276 ◽  
Author(s):  
Hui Wang ◽  
Katherine Hollywood ◽  
Roger M. Jarvis ◽  
Jonathan R. Lloyd ◽  
Royston Goodacre
Keyword(s):  
Ir Spectroscopy ◽  
High Performance ◽  
Shewanella Oneidensis ◽  
Anaerobic Respiration ◽  
Electron Acceptors ◽  
Redox Mediators ◽  
Ft Ir ◽  
Aerobic And Anaerobic ◽  
Ft Ir Spectroscopy

ABSTRACT Shewanella oneidensis is able to conserve energy for growth by reducing a wide variety of terminal electron acceptors during anaerobic respiration, including several environmentally hazardous pollutants. This bacterium employs various electron transfer mechanisms for anaerobic respiration, including cell-bound reductases and secreted redox mediators. The aim of this study was to develop rapid tools for profiling the key metabolic changes associated with these different growth regimes and physiological responses. Initial experiments focused on comparing cells grown under aerobic and anaerobic conditions. Fourier transform infrared (FT-IR) spectroscopy with cluster analysis showed that there were significant changes in the metabolic fingerprints of the cells grown under these two culture conditions. FT-IR spectroscopy clearly differentiated cells of S. oneidensis MR-1 cultured at various growth points and cells grown using different electron acceptors, resulting in different phenotypic trajectories in the cluster analysis. This growth-related trajectory analysis is applied successfully for the first time, here with FT-IR spectroscopy, to investigate the phenotypic changes in contrasting S. oneidensis cells. High-performance liquid chromatography (HPLC) was also used to quantify the concentrations of flavin compounds, which have been identified recently as extracellular redox mediators released by a range of Shewanella species. The partial least-squares regression (PLSR) multivariate statistical technique was combined with FT-IR spectroscopy to predict the concentrations of the flavins secreted by cells of S. oneidensis MR-1, suggesting that this combination could be used as a rapid alternative to conventional chromatographic methods for analysis of flavins in cell cultures. Furthermore, coupling of the FT-IR spectroscopy and HPLC techniques appears to offer a potentially useful tool for rapid characterization of the Shewanella cell metabolome in various process environments.

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