An FT-IR based investigation of trehalose mediated thermal stabilisation of Bacillus clausii

2021 ◽  
Vol 17 ◽  
Author(s):  
Maria T. Caccamo ◽  
Salvatore. Magazù
Keyword(s):  
Fourier Transform ◽  
Food Industry ◽  
Thermal Response ◽  
Spectroscopy Analysis ◽  
External Temperature ◽  
Temperature Changes ◽  
Spectral Distance ◽  
Bacillus Clausii ◽  
Ft Ir

Background: Fourier Transform InfraRed spectroscopy analysis on Bacillus clausii and Bacillus clausii in the presence of trehalose are reported. Objective: in order to characterize the thermal response of such systems the InfraRed technique was employed to collect the spectra from 25.0°C to 80.0°C in the 4000 cm-1 - 400 cm-1 spectral range. Methods: The data analysis was performed focusing the attention to the intramolecular OH stretching vibrational region by means evaluating the spectral distance as a function of temperature. Results: From this analysis it emerges that the thermal restraint of Bacillus clausii in the presence of trehalose is higher in respect to Bacillus clausii alone. Conclusion: Such a result, which confirms the bioprotective role of trehalose against external temperature changes, provides useful information for the applications of the disaccharide in food industry.

scholarly journals SCREENING FOR PHYTOCHEMICALS AND FTIR ANALYSIS OF MYRISTICA DACTYLOIDS FRUIT EXTRACTS

2016 ◽  
Vol 9 (1) ◽  
pp. 315 ◽  
Author(s):  
P. Rajiv ◽  
A. Deepa ◽  
P. Vanathi ◽  
D. Vidhya
Keyword(s):  
Fourier Transform ◽  
Methanolic Extract ◽  
Phytochemical Analysis ◽  
Ftir Analysis ◽  
Spectroscopy Analysis ◽  
Standard Methods ◽  
Fruit Extracts ◽  
Ft Ir ◽  
Amine Groups ◽  
Ir Analysis

<p><strong>Objective: </strong>The present investigation focus on screening of phytochemicals and FT-IR analysis of <em>Myristica dactyloids </em>fruit extracts. The fruit extracts were prepared using five different solvents.</p><p><strong>Methods: </strong>The phytochemical analysis and FT-IR (Fourier transform infrared spectroscopy) analysis were performed using standard methods.</p><p><strong>Results: </strong>The results reveals that the alkaloids, steroids, flavonoids, phenolic compounds, proteins, carbohydrates, cardio glycosides and saponins were present in methanolic extract when compared to other solvent extracts. FT-IR analysis shows the presence of different functional groups such as carboxylic acids, aromatics, alkanes, alcohols, phenols, aliphatic amines, alkenes and amine groups in the fruit extracts.</p><p><strong>Conclusion: </strong>The study concluded that the methanolic extract (<em>M. dactyloides </em>fruit) has potential bioactive compounds.</p>

scholarly journals EFFECT OF POLYCAPROLACTONE ON CHARACTERISTICS AND MORPHOLOGY OF ALGINATE/CHITOSAN/LOVASTATINE COMPOSITE FILMS

2018 ◽  
Vol 56 (4A) ◽  
pp. 13 ◽  
Author(s):  
Nguyễn Thúy Chinh ◽  
Hoang Thai ◽  
Loc Thi Thach ◽  
Giang Duc Le ◽  
Thuy Phuong Ngo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Solution Method ◽  
Composite Films ◽  
Total Weight ◽  
Differential Scanning Calorimetric ◽  
Ft Ir ◽  
Scanning Electron

In this work, alginate (AG)/chitosan (CS)/lovastatine (LS) AG/CS/PCL/LS composite films using polycaprolactone (PCL)  are prepared by solution method with the ratio of AG/CS and LS content fixed at 4/1 and 10 wt.% (in comparison with the total weight of CS and AG), respectively.  The PCL content is used at 3, 5 and 10 wt.% (in compared with total weight of AG, CS and LS). The role of PCL as a compatibilizer in AG)/CS)/LS composites is considered by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Differential Scanning Calorimetric (DSC) methods. Based on the change in FTIR spectra, morphology and thermal parameters of AG/CS/PCL/LS composites, it can be seen that PCL has effectiveness of compatibility for AG, CS, and LS as well as plasticity for the composites. Besides, the influence of PCL content on the swelling degree of the composites is also investigated. 

scholarly journals Fourier-transform infrared (FT-IR) spectroscopy analysis discriminates asymptomatic and symptomatic Norway spruce trees

Plant Science ◽  
2019 ◽  
Vol 289 ◽  
pp. 110247
Author(s):  
Mukrimin Mukrimin ◽  
Anna O. Conrad ◽  
Andriy Kovalchuk ◽  
Riitta Julkunen-Tiitto ◽  
Pierluigi Bonello ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Norway Spruce ◽  
Fourier Transform Infrared ◽  
Spectroscopy Analysis ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

scholarly journals An FT-IR spectroscopic study of the role of hydrogen bonding in the formation of liquid crystallinity for mixtures containing bipyridines and 4-pentoxybenzoic acid

RSC Advances ◽  
2016 ◽  
Vol 6 (110) ◽  
pp. 108164-108179 ◽  
Author(s):  
Alfonso Martinez-Felipe ◽  
Andrew G. Cook ◽  
Jordan P. Abberley ◽  
Rebecca Walker ◽  
John M. D. Storey ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Spectroscopic Study ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Liquid Crystallinity ◽  
Ft Ir ◽  
Ir Spectroscopic

The relationships between liquid crystallinity and hydrogen bonding are studied in mixtures containing 4-pentoxybenzoic acid, 5OBA, and five bipyridines, XBiPy, with spacers having different flexibilities, by Fourier transform infrared spectroscopy.

FR-IR Molecular Microanalysis System

1990 ◽  
Vol 48 (2) ◽  
pp. 270-271
Author(s):  
John A. Reffner ◽  
William T. Wihlborg
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Integrated System ◽  
Morphological Examination ◽  
Fully Integrated ◽  
Ir Microscopy ◽  
Normal Functions ◽  
Infrared Microspectroscopy ◽  
Infrared Spectral ◽  
Ft Ir

The IRμs™ is the first fully integrated system for Fourier transform infrared (FT-IR) microscopy. FT-IR microscopy combines light microscopy for morphological examination with infrared spectroscopy for chemical identification of microscopic samples or domains. Because the IRμs system is a new tool for molecular microanalysis, its optical, mechanical and system design are described to illustrate the state of development of molecular microanalysis. Applications of infrared microspectroscopy are reviewed by Messerschmidt and Harthcock.Infrared spectral analysis of microscopic samples is not a new idea, it dates back to 1949, with the first commercial instrument being offered by Perkin-Elmer Co. Inc. in 1953. These early efforts showed promise but failed the test of practically. It was not until the advances in computer science were applied did infrared microspectroscopy emerge as a useful technique. Microscopes designed as accessories for Fourier transform infrared spectrometers have been commercially available since 1983. These accessory microscopes provide the best means for analytical spectroscopists to analyze microscopic samples, while not interfering with the FT-IR spectrometer’s normal functions.

Sticky ends in a self-assembling ABA triblock copolymer: the role of ureas in stimuli-responsive hydrogels

2019 ◽  
Vol 4 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Ryan T. Shafranek ◽  
Joel D. Leger ◽  
Song Zhang ◽  
Munira Khalil ◽  
Xiaodan Gu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Viscoelastic Properties ◽  
Triblock Copolymer ◽  
Thermal Response ◽  
Stimuli Responsive ◽  
Self Assembling ◽  
Polymeric Hydrogels ◽  
Aba Triblock Copolymer ◽  
Responsive Hydrogels

Directed self-assembly in polymeric hydrogels allows tunability of thermal response and viscoelastic properties.

scholarly journals Experimental and Theoretical Studies of Sonically Prepared Cu–Y, Cu–USY and Cu–ZSM-5 Catalysts for SCR deNOx

Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 824
Author(s):  
Przemysław J. Jodłowski ◽  
Izabela Czekaj ◽  
Patrycja Stachurska ◽  
Łukasz Kuterasiński ◽  
Lucjan Chmielarz ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Ultrasonic Irradiation ◽  
Active Phase ◽  
Spectroscopic Studies ◽  
In Situ Drifts ◽  
Ft Ir ◽  
Diffuse Reflectance Infrared ◽  
Experimental And Theoretical Studies

The objective of our study was to prepare Y-, USY- and ZSM-5-based catalysts by hydrothermal synthesis, followed by copper active-phase deposition by either conventional ion-exchange or ultrasonic irradiation. The resulting materials were characterized by XRD, BET, SEM, TEM, Raman, UV-Vis, monitoring ammonia and nitrogen oxide sorption by FT-IR and Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS). XRD data confirmed the purity and structure of the Y/USY or ZSM-5 zeolites. The nitrogen and ammonia sorption results indicated that the materials were highly porous and acidic. The metallic active phase was found in the form of cations in ion-exchanged zeolites and in the form of nanoparticle metal oxides in sonochemically prepared catalysts. The latter showed full activity and high stability in the SCR deNOx reaction. The faujasite-based catalysts were fully active at 200–400 °C, whereas the ZSM-5-based catalysts reached 100% activity at 400–500 °C. Our in situ DRIFTS experiments revealed that Cu–O(NO) and Cu–NH3 were intermediates, also indicating the role of Brønsted sites in the formation of NH4NO3. Furthermore, the results from our experimental in situ spectroscopic studies were compared with DFT models. Overall, our findings suggest two possible mechanisms for the deNOx reaction, depending on the method of catalyst preparation (i.e., conventional ion-exchange vs. ultrasonic irradiation).

The role of melatonin on zebrafish follicle development: An FT-IR imaging approach

2012 ◽  
Vol 62 ◽  
pp. 279-285 ◽  
Author(s):  
Elisabetta Giorgini ◽  
Giorgia Gioacchini ◽  
Carla Conti ◽  
Paolo Ferraris ◽  
Simona Sabbatini ◽  
...  
Keyword(s):  
Follicle Development ◽  
Ir Imaging ◽  
Imaging Approach ◽  
Ft Ir
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