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Journal articles on the topic 'Fourier trans-formation'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Sarfaraz Ahmed Mahesar, Sarfaraz Ahmed Mahesar, Taimoor Hassan Shaikh Taimoor Hassan Shaikh, Zahid Hussain Shar Ghulam Abbas Kandhro Zahid Hussain Shar Ghulam Abbas Kandhro, and Abdul Rauf Khaskheli and Syed Tufail Hussain Sherazi Abdul Rauf Khaskheli and Syed Tufail Hussain Sherazi. "Evaluation of Trans Fat in Vermicelli by Fourier Transform Infrared Spectroscopy in Combination with Chemometric Technique." Journal of the chemical society of pakistan 42, no. 3 (2020): 468. http://dx.doi.org/10.52568/000642.

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Since there is limited knowledge about trans fat levels in snack foods available in Pakistan. This study aimed to determine trans fat content in fried vermicelli (a common snack food). It is prepared in partially hydrogenated oil (ghee), which is the main cause of trans fat formation. Twenty-one fried vermicelli samples were collected from different local shops of Hyderabad, Pakistan and subjected to oil extraction by using Soxhlet method. Partial least square regression model was developed to quantify trans fats in fried vermicelli using FTIR spectroscopy. Total oil content in fried vermicell

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2

Sarfaraz Ahmed Mahesar, Sarfaraz Ahmed Mahesar, Taimoor Hassan Shaikh Taimoor Hassan Shaikh, Zahid Hussain Shar Ghulam Abbas Kandhro Zahid Hussain Shar Ghulam Abbas Kandhro, and Abdul Rauf Khaskheli and Syed Tufail Hussain Sherazi Abdul Rauf Khaskheli and Syed Tufail Hussain Sherazi. "Evaluation of Trans Fat in Vermicelli by Fourier Transform Infrared Spectroscopy in Combination with Chemometric Technique." Journal of the chemical society of pakistan 42, no. 3 (2020): 468. http://dx.doi.org/10.52568/000642/jcsp/42.03.2020.

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Since there is limited knowledge about trans fat levels in snack foods available in Pakistan. This study aimed to determine trans fat content in fried vermicelli (a common snack food). It is prepared in partially hydrogenated oil (ghee), which is the main cause of trans fat formation. Twenty-one fried vermicelli samples were collected from different local shops of Hyderabad, Pakistan and subjected to oil extraction by using Soxhlet method. Partial least square regression model was developed to quantify trans fats in fried vermicelli using FTIR spectroscopy. Total oil content in fried vermicell

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3

Ortega, Jose, Arturo Martínez Zavala, Maribel Hernández, and Joel Díaz Reyes. "Analysis of trans fatty acids production and squalene variation during amaranth oil extraction." Open Chemistry 10, no. 6 (2012): 1773–78. http://dx.doi.org/10.2478/s11532-012-0104-4.

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AbstractThe purpose of this study was to evaluate the decay of squalene and the formation of trans fatty acids (TFAs) in the amaranth oil extracted with hexane with and without heat. Oils were analyzed by determining their chemical values, and the fatty acids were identified and quantified by using Fourier-transform infrared (FTIR) spectroscopy, in the mid-region of 400–4000 cm−1, and gas chromatography. The FTIR analysis shows that two oil extracts (with and without heat) present a well-defined peak at 968 cm−1, which represents the trans double bonds. The quantified TFAs are

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4

Johnson, W. C., and B. J. Lyons. "Radiolytic formation and decay of trans-vinylene unsaturation in polyethylene: Fourier transform infra-red measurements." Radiation Physics and Chemistry 46, no. 4-6 (1995): 829–32. http://dx.doi.org/10.1016/0969-806x(95)00271-x.

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Antiñolo, María, María Asensio, José Albaladejo, and Elena Jiménez. "Gas-Phase Reaction of trans-2-Methyl-2-butenal with Cl: Kinetics, Gaseous Products, and SOA Formation." Atmosphere 11, no. 7 (2020): 715. http://dx.doi.org/10.3390/atmos11070715.

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The gas-phase reaction between trans-2-methyl-2-butenal and chlorine (Cl) atoms has been studied in a simulation chamber at 298 ± 2 K and 760 ± 5 Torr of air under free-NOx conditions. The rate coefficient of this reaction was determined as k = (2.45 ± 0.32) × 10−10 cm3 molecule−1 s−1 by using a relative method and Fourier transform infrared spectroscopy. In addition to this technique, gas chromatography coupled to mass spectrometry and proton transfer time-of-flight mass spectrometry were used to detect and monitor the time evolution of the gas-phase reaction products. The major primary react

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Kalalian, Carmen, Asma Grira, Jan Niklas Illmann, et al. "Experimental and Theoretical Studies of Trans-2-Pentenal Atmospheric Ozonolysis." Atmosphere 13, no. 2 (2022): 291. http://dx.doi.org/10.3390/atmos13020291.

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We investigated the kinetics, mechanism and secondary organic aerosols formation of the ozonolysis of trans-2-pentenal (T2P) using four different reactors with Fourier Transform InfraRed (FTIR) spectroscopy and Gas Chromatography (GC) techniques at T = 298 ± 2 K and 760 Torr in dry conditions. The rate coefficients and branching ratios were also evaluated using the canonical variational transition (CVT) state theory coupled with small curvature tunneling (CVT/SCT) in the range 278–350 K. The experimental rate coefficient at 298 K was (1.46 ± 0.17) × 10−18 cm3 molecule−1 s−1, in good agreement

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García-González, Diego L., and Frederik R. Van De Voort. "A Novel Wire Mesh “Cell” for Studying Lipid Oxidative Processes by Fourier Transform Infrared Spectroscopy." Applied Spectroscopy 63, no. 5 (2009): 518–27. http://dx.doi.org/10.1366/000370209788346995.

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A novel infrared (IR) sample handling accessory has been developed to monitor and study oxidation processes of edible oils under moderate temperature conditions by Fourier transform infrared (FT-IR) spectroscopy. A reusable stainless steel mesh IR “cell” was designed and evaluated from the standpoint of mesh size, transmission characteristics, its ability to entrap oil, and techniques to apply sample and normalize path length so as to obtain good quality, reproducible spectra. The concept is to entrap oil within the mesh by means of its inherent surface tension and to take advantage of the hig

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8

Ito, Fumiyuki. "Observation of Light-Induced Reactions of Olefin–Ozone Complexes in Cryogenic Matrices Using Fourier-Transform Infrared Spectroscopy." Photochem 2, no. 1 (2022): 150–64. http://dx.doi.org/10.3390/photochem2010012.

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Each olefin (ethylene, trans-1,3-butadiene, isoprene, dimethyl butadiene (DMB)) and ozone molecules were codeposited on a CsI window at cryogenic temperature, and the products of photolysis with ultraviolet–visible light were observed using Fourier-transform infrared spectroscopy. The products of the C2H4–O3 system could be assigned to glyoxal (CHO–CHO), ethylene oxide (c–C2H4O), CO, and CO2. The formation of CHO–CHO and c–C2H4 and the absence of H2CO and HCOOH indicated that the main reaction channels did not involve C–C bond breaking. Based on this simple scheme, the photoproducts of differe

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9

Clark, Peter D., James F. Fait, Colin G. Jones, and Martin J. Kirk. "Reactions of benzo[b]thiophene with some aqueous platinum metal species at elevated temperatures." Canadian Journal of Chemistry 69, no. 4 (1991): 590–98. http://dx.doi.org/10.1139/v91-089.

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The desulfurization of benzo[b]thiophene 1 with aqueous transition metal species in the presence of various hydrocarbons at elevated temperatures is described. Mechanistic studies have shown that treatment of 1 with solutions of RuCl3 and other platinum metal species results in the formation of 2,3-dihydrobenzo[b]thiophene 2 and ethylbenzene 3 as major products. Metal coordinated species are probable intermediates in the formation of 2 and hydrocarbon products. 2 readily coordinates to PdCl2 to form square-planar trans-dichlorobis(2,3-dihydrobenzo[b]thiophene) palladium(II), which decomposes t

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Chawananon, Sathapana, Pierre Asselin, Jordan A. Claus, et al. "Rovibrational Spectroscopy of Trans and Cis Conformers of 2-Furfural from High-Resolution Fourier Transform and QCL Infrared Measurements." Molecules 28, no. 10 (2023): 4165. http://dx.doi.org/10.3390/molecules28104165.

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The ortho-isomer 2-furfural (2-FF), which is a primary atmospheric pollutant produced from biomass combustion, is also involved in oxidation processes leading to the formation of secondary organic aerosols. Its contribution to radiative forcing remains poorly understood. Thus, monitoring 2-FF directly in the atmosphere or in atmospheric simulation chambers to characterize its reactivity is merited. The present study reports an extensive jet-cooled rovibrational study of trans and cis conformers of 2-FF in the mid-IR region using two complementary setups: a continuous supersonic jet coupled to

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RATH, Parshuram, Frank DELANGE, J. Willem DEGRIP, and J. Kenneth ROTHSCHILD. "Hydrogen bonding changes of internal water molecules in rhodopsin during metarhodopsin I and metarhodopsin II formation." Biochemical Journal 329, no. 3 (1998): 713–17. http://dx.doi.org/10.1042/bj3290713.

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Rhodopsin is a 7-helix, integral membrane protein found in the rod outer segments, which serves as the light receptor in vision. Light absorption by the retinylidene chromophore of rhodopsin triggers an 11-cis → all-trans isomerization, followed by a series of protein conformational changes, which culminate in the binding and activation of the G-protein transducin by the metarhodopsin II (Meta II) intermediate. Fourier transform IR difference spectroscopy has been used to investigate the structural changes that water, as well as other OH- and NH-containing groups, undergo during the formation

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12

Miao, Xuepei, An Xing, Lifan He, Yan Meng, and Xiaoyu Li. "One-Step Preparation of Hyperbranched Polyether Functionalized Graphene Oxide for Improved Corrosion Resistance of Epoxy Coatings." Coatings 9, no. 12 (2019): 844. http://dx.doi.org/10.3390/coatings9120844.

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In this paper, hyperbranched polyether functionalized graphene oxide (EHBPE-GO) was prepared by a facile one-step method. Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), thermogravimetric analyzer (TGA), and trans-mission electron microscopy (TEM) results confirmed the formation of EHBPE-GO. Then, EHBPE-GO was cured with phenolic amides at room temperature to prepare epoxy coatings. The corrosion resistance of epoxy coatings was investigated systematically by using electrochemical and traditional immersion methods. Results show that a small amount of EHBPE-GO (8 wt

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Kuryliak, D. B., Z. T. Nazarchuk, M. V. Voytko, and Ya P. Kulynych. "Scattering of SH-wave by an impedance strip on the rigid wall of the plane elastic waveguide." Information extraction and processing 2022, no. 50 (2022): 19–25. http://dx.doi.org/10.15407/vidbir2022.50.019.

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The problem of SH-wave scattering from an impedance strip on the rigid wall of an elastic waveguide is considered. The opposite waveguide surface is free from tensions. This structure is illuminated by one of the normal SH-waves that propagate along the waveguide without attenuation. The displacement of the particles in this wave is perpendicular to the direction of wave propagation and has the harmonic dependence on time. The problem is two-dimensional and is reduced to the mixed boundary value problem for Helmholtz equation with respect to the unknown diffracted displacement field. The separ

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Onas, Andra Mihaela, Iuliana Elena Biru, Aida Petca, and Razvan Cosmin Petca. "The Aging Behavior of Polyurethane-based Ureteral Catheters." Materiale Plastice 58, no. 4 (2022): 65–72. http://dx.doi.org/10.37358/mp.21.4.5532.

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Ureteral catheters, commonly known as double j stents according to their specific shape, are largely used worldwide with good results to assure proper renal drainage and to overpass ureteral obstacles successfully. This study deals with the aging behavior of polyurethane-based urinary catheters, explanted at different time intervals: 22 days, 29 days, three months, and eight months respectively. TGA (Thermogravimetric analyses) tests showed significant differences in the thermal behavior of polyurethane-based material, especially at eight months, where a higher thermostability was noticed. Als

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15

Horn, Michael, Karin Nienhaus, and Gerd Ulrich Nienhaus. "Fourier transform infrared spectroscopy study of ligand photodissociation and migration in inducible nitric oxide synthase." F1000Research 3 (November 28, 2014): 290. http://dx.doi.org/10.12688/f1000research.5836.1.

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Inducible nitric oxide synthase (iNOS) is a homodimeric heme enzyme that catalyzes the formation of nitric oxide (NO) from dioxygen and L-arginine (L-Arg) in a two-step process. The produced NO can either diffuse out of the heme pocket into the surroundings or it can rebind to the heme iron and inhibit enzyme action. Here we have employed Fourier transform infrared (FTIR) photolysis difference spectroscopy at cryogenic temperatures, using the carbon monoxide (CO) and NO stretching bands as local probes of the active site of iNOS. Characteristic changes were observed in the spectra of the heme-

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Horn, Michael, Karin Nienhaus, and Gerd Ulrich Nienhaus. "Fourier transform infrared spectroscopy study of ligand photodissociation and migration in inducible nitric oxide synthase." F1000Research 3 (December 12, 2014): 290. http://dx.doi.org/10.12688/f1000research.5836.2.

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Inducible nitric oxide synthase (iNOS) is a homodimeric heme enzyme that catalyzes the formation of nitric oxide (NO) from dioxygen and L-arginine (L-Arg) in a two-step process. The produced NO can either diffuse out of the heme pocket into the surroundings or it can rebind to the heme iron and inhibit enzyme action. Here we have employed Fourier transform infrared (FTIR) photolysis difference spectroscopy at cryogenic temperatures, using the carbon monoxide (CO) and NO stretching bands as local probes of the active site of iNOS. Characteristic changes were observed in the spectra of the heme-

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Suaniti, Ni Made, I. Wayan Bandem Adnyana, and Tjokorda Gde Tirta Nindhia. "Ester Group Detection of Biodiesel from Used Cooking Oil with Sulphuric and Toluene Sulphuric Acid Catalysts." Key Engineering Materials 877 (February 2021): 153–59. http://dx.doi.org/10.4028/www.scientific.net/kem.877.153.

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Used cooking oil is potential as raw material to produce biodiesel. We discovered fatty acid ethyl esters (FAEEs) and methyl esters (FAMEs) as biodiesel content indicator from esterification and trans-esterification reactions of used cooking oil with sulphuric acid and toluene sulphuric acid as catalysts. The purpose of this study was to examine some characteristics of FAEE and FAME synthesis from used cooking oil. The FAEEs and FAMEs were detected by separation in thin layer chromatography (TLC) and Fourier Transform Infrared (FT-IR) and compared to laurate standar. The used cooking oil was p

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Catenacci, Laura, Milena Sorrenti, Maria Cristina Bonferoni, Lee Hunt, and Mino R. Caira. "Inclusion of the Phytoalexin trans-Resveratrol in Native Cyclodextrins: A Thermal, Spectroscopic, and X-Ray Structural Study." Molecules 25, no. 4 (2020): 998. http://dx.doi.org/10.3390/molecules25040998.

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The aim of the study was to determine the feasibility of complexation between the antioxidant trans-resveratrol (RSV) and underivatized cyclodextrins (CDs) using a variety of preparative methods, including physical mixing, kneading, microwave irradiation, co-evaporation, and co-precipitation techniques. Products were characterized using differential scanning calorimetry (DSC), simultaneous thermogravimetric/DSC analysis (TGA/DSC), Fourier transform infrared (FT-IR) spectroscopy, and powder X-ray diffraction (PXRD). With α-CD and RSV, sample amorphization was revealed by PXRD and FT-IR, but no

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Mojumdar, Enamul Haque, Lone Bruhn Madsen, Henri Hansson, et al. "Probing Skin Barrier Recovery on Molecular Level Following Acute Wounds: An In Vivo/Ex Vivo Study on Pigs." Biomedicines 9, no. 4 (2021): 360. http://dx.doi.org/10.3390/biomedicines9040360.

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Proper skin barrier function is paramount for our survival, and, suffering injury, there is an acute need to restore the lost barrier and prevent development of a chronic wound. We hypothesize that rapid wound closure is more important than immediate perfection of the barrier, whereas specific treatment may facilitate perfection. The aim of the current project was therefore to evaluate the quality of restored tissue down to the molecular level. We used Göttingen minipigs with a multi-technique approach correlating wound healing progression in vivo over three weeks, monitored by classical metho

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McKinnon, Alexandra, Brendan Moore, Pavle Djuricanin, and Takamasa Momose. "UV Photolysis Study of Para-Aminobenzoic Acid Using Parahydrogen Matrix Isolated Spectroscopy." Photochem 2, no. 1 (2022): 88–101. http://dx.doi.org/10.3390/photochem2010008.

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Many sunscreen chemical agents are designed to absorb UVB radiation (and in some cases UVA) to protect the skin from sunlight, but UV absorption is often accompanied by photodissociation of the chemical agent, which may reduce its UV absorption capacity. Therefore, it is important to understand the photochemical processes of sunscreen agents. In this study, the photolysis of para-aminobenzoic acid (PABA), one of the original sunscreen chemical agents, at three different UV ranges (UVA: 355 nm, UVB: >280 nm, and UVC: 266 nm and 213 nm) was investigated using parahydrogen (pH2) matrix isolati

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Hiendrawan, Stevanus, Bambang Veriansyah, and Raymond R. Tjandrawinata. "SOLID-STATE PROPERTIES AND SOLUBILITY STUDIES OF NOVEL PHARMACEUTICAL COCRYSTAL OF ITRACONAZOLE." International Journal of Applied Pharmaceutics 10, no. 5 (2018): 97. http://dx.doi.org/10.22159/ijap.2018v10i5.26663.

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Objective: Pharmaceutical cocrystal is a promising method to improve the solubility of active pharmaceutical ingredients (APIs). Itraconazole (ITZ) is a BCS class II antifungal drug with poor aqueous solubility, therefore an attempt was made to improve the solubility of ITZ using cocrystallization technique. In this work, six novel pharmaceutical cocrystals of ITZ with various coformers, including 4-hydroxybenzoic acid (4HBA), trans-cinnamic acid (TCA), suberic acid (SUB), sebacic acid (SBC), 1-hydroxy-2-naphthoic acid (1H2N), and benzamide (BZD) were prepared.Methods: ITZ cocrystals was prepa

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Lopez, T., J. Hernandez-Ventura, D. H. Aguilar, and P. Quintana. "Thermal Phase Stability and Catalytic Properties of Nanostructured TiO2-MgO Sol–Gel Mixed Oxides." Journal of Nanoscience and Nanotechnology 8, no. 12 (2008): 6608–17. http://dx.doi.org/10.1166/jnn.2008.18434.

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Several compositions in the system TiO2-MgO were prepared via sol–gel method. The structural evolution of the samples was followed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and thermal analysis (DTA/TG). In order to study the crystalline phase stability over time, the amorphous fresh gels were subjected to successive thermal treatments from 100 to 1100 °C, with a total annealing time of 442 h. Below 350 °C, magnesium acetates and oxalates phases were detected; at higher temperatures the binary compounds MgTi2O5, MgTiO3 and Mg2TiO4 appeared over a wide range of

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23

Athanasiadis, Vassilis, Theodoros Chatzimitakos, Dimitrios Kalompatsios, Eleni Bozinou, and Stavros I. Lalas. "Exploration of High-Nutritional-Quality Vegetable Oil Blend with Enhanced Oxidative Stability as a Frying Medium Substitute for Palm Oil." Lipidology 1, no. 1 (2024): 75–91. http://dx.doi.org/10.3390/lipidology1010006.

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Blending is a commonly utilized technique for enhancing the oxidative stability, nutritional quality, and physicochemical properties of vegetable oils. This study explored the potential of a vegetable oil blend consisting of common seed oils (sunflower, soybean, rapeseed, cottonseed, and corn oils), through partial least squares analysis, as a substitute for palm oil in the food preparation sector. Oxidative stability assays were conducted initially and after 14 and 28 days of incubation at 60 °C. These assays included radical inhibition activities between the optimal blended oil and palm oil

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Zemskov, A. V., and Van Hao Le. "UNSTEADY THERMOELASTIC DIFFUSION VIBRATIONS OF THE BERNOULLI – EULER BEAM UNDER THE ACTION OF A DISTRIBUTED TRANSVERSE LOAD." PNRPU Mechanics Bulletin, no. 3 (December 15, 2023): 75–85. http://dx.doi.org/10.15593/perm.mech/2023.3.07.

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The paper deals with the problem of unsteady vibrations of the Bernoulli – Euler beam, taking into account relaxation of temperature and diffusion processes. The original mathematical model includes a system of equations of non-stationary bending oscilla-tions of the beam taking into account heat and mass transfer, which is obtained from the general model of thermoelastic diffusion for continuum using variational D'Alembert prin-ciple. Based on the obtained equations, the statement of the initial-boundary problem concerning bending of the hinged orthotropic beam, which is under the action of t

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25

Witt, Matthias, and Hans-Friedrich Grützmacher. "Effects of Internal Hydrogen Bonds between Amide Groups: Gas-Phase Basicity and Proton Affinity of Linear Aliphatic Dicarboxamides." European Journal of Mass Spectrometry 6, no. 2 (2000): 97–107. http://dx.doi.org/10.1255/ejms.317.

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The apparent gas-phase basicity GBapp and the proton affinity PA of aliphatic dicarboxamides has been determined by tandem mass spectrometry using the kinetic method. The diamides analyzed are primary maleic acid diamide (1a), fumaric acid diamide (2a) and trans, trans-muconic acid diamide (3a) and the tertiary N,N,N‘,N’-tetramethyl derivatives 2b and 3b, which have an almost fixed relative orientation of the terminal amide groups because of the C–C double bond(s) in the carbon skeleton, and the 1,n-dicarboxamides of succinic acid (4a) and (4b), of glutaric acid (5a) and (5b), of adipinic acid

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Lopresti, Mattia, Marco Milanesio, and Luca Palin. "The Crystal Structure of Calcium Sebacate by X-ray Powder Diffraction Data." Crystals 13, no. 2 (2023): 261. http://dx.doi.org/10.3390/cryst13020261.

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Sodium sebacate salts have several industrial applications as additives, lubricants, and a metal self-healing promoter in general industry, and some derivatives also have wide applications in cosmetics and pharmaceutical fields. Calcium sebacate formation and precipitation can be detrimental for the systems where sodium sebacate is used. It is thus important to investigate their crystallization features. Sodium and calcium sebacate were prepared, purified, and crystallized with different approaches to carry out a full X-ray diffraction powder diffraction structural analysis since suitable sing

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Frauenrath, Marvin, Pablo Acosta Alba, Anne-Marie Papon, and Jean-Michel Hartmann. "Nanosecond Laser Annealing of In-Situ Boron-Doped Ge Layers for Dopant Activation." ECS Meeting Abstracts MA2022-02, no. 32 (2022): 1228. http://dx.doi.org/10.1149/ma2022-02321228mtgabs.

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Doped Ge can be employed in the sources and drains of Ge pMOS transistors 1 or as p-type films in Ge p-i-n Photo-Detectors (PDs) 2. If the growth temperature is low enough, they can even be used in GeSn PDs and Light Emitting Devices 3. Those Short and Mid Wavelength Infra-Red devices are rapidly gaining interest especially since the demonstration of electrically pumped lasing in GeSn at temperatures up to 100K by the University of Arkansas 4. The electrically active carrier concentration in binary Si:P was significantly increased thanks to a dissolution with nanosecond laser annealing (NLA) o

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Liu, Nan, Jie Xiao, Ling-He Zang, Peng Quan, and Dong-Chun Liu. "Preparation of trans-Crocetin with High Solubility, Stability, and Oral Bioavailability by Incorporation into Three Types of Cyclodextrins." Pharmaceutics 15, no. 12 (2023): 2790. http://dx.doi.org/10.3390/pharmaceutics15122790.

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Crocetin (CRT), an active compound isolated from saffron, exhibits several pharmacological activities, including anti-tumor and immune-regulatory activities, and is effective against myocardial ischemia and coronary heart disease; however, its low stability and solubility limit its clinical application. Therefore, we investigated CRT inclusion complexes (ICs) with three cyclodextrins—α-CD, HP-β-CD, and γ-CD—suitable for oral administration prepared using an ultrasonic method. Fourier transform infrared spectroscopy and powder X-ray diffraction indicated that the crystalline state of CRT in ICs

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Michaud, Laurent Gaëtan, Frank Fournel, Christophe Morales, et al. "Inline Bondwave Monitoring for Direct Bonding, Process Optimization and Impact on Post-Bond Distortion." ECS Meeting Abstracts MA2023-02, no. 33 (2023): 1587. http://dx.doi.org/10.1149/ma2023-02331587mtgabs.

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Direct wafer bonding, named also fusion wafer bonding, is based on the formation of molecular bonds between the two surfaces placed in contact. By the initiation of the contact between the two surfaces the bond is self-propagating: at the initiation point a bondwave is generated, which propagates free until the entire surfaces are in contact (bonded). The dynamic of the bondwave propagation is depending on various material (substrates) and process parameters. As shown by Rieutord et al. (1), and experimentally confirmed (2), for a given material and geometry, the speed is function of adhesion

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Sawatari, Yuki, Yoshimichi Shimomura, Masato Takeuchi, et al. "Supramolecular liquid crystals from the dimer of L‐shaped molecules with tertiary amide end groups." Aggregate, January 23, 2024. http://dx.doi.org/10.1002/agt2.507.

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AbstractSupramolecular liquid crystals (SLCs) are attractive materials for fabricating devices with new optoelectronic functions. Conventional SLCs are made from hydrogen‐bonded mesogens. However, these mesogens suffer from high melting points, and the types of formable aggregates are limited owing to the directionality of the hydrogen bonding. Therefore, to fabricate non‐hydrogen‐bonded SLCs, we hypothesized that the introduction of tertiary amide groups into calamitic molecules would be advantageous because they have an L‐shaped structure with N‐ or C‐alkyl side chains not aligned along the

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Cai, Jia-Rong, Jung-Hsuan Su, and Yuan-Pern Lee. "Formation reaction mechanism and infrared spectra of anti-trans-methacrolein oxide and its associated precursor and adduct radicals." Communications Chemistry 5, no. 1 (2022). http://dx.doi.org/10.1038/s42004-022-00644-0.

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AbstractMethacrolein oxide (MACRO) is an important carbonyl oxide produced in ozonolysis of isoprene, the most abundantly-emitted non-methane hydrocarbon in the atmosphere. We employed a step-scan Fourier-transform infrared spectrometer to investigate the source reaction of MACRO in laboratories. Upon UV irradiation of precursor CH2IC(CH3)CHI (1), the CH2C(CH3)CHI radical (2) was detected, confirming the fission of the allylic C‒I bond rather than the vinylic C‒I bond. Upon UV irradiation of (1) and O2 near 21 Torr, anti-trans-MACRO (3a) was observed to have an intense OO-stretching band near

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Kumar, Sunil, Ashutosh Sharma, Suman Mahala та ін. "Macrocyclic Sulfur Ligand Stabilized Trans‐Palladium Dichloride Complex: Syntheses, Structure, Chlorine Rotation, and Application in α‐Olefination of Nitriles by Primary Alcohols". Chemistry – An Asian Journal, 20 грудня 2023. http://dx.doi.org/10.1002/asia.202300935.

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Herein, we have reported synthesis of a macrocyclic organosulfur ligand (L1) having seventeen‐membered macrocyclic ring. Subsequently, the corresponding trans‐palladium complex (C1) of bulky macrocyclic organosulfur ligand was synthesized by reacting it with PdCl2(CH3CN)2 salt. The newly synthesized ligand and complex were characterized using various analytical and spectroscopic techniques such as 1H, 13C{1H} Nuclear Magnetic Resonance (NMR), Ultraviolet–visible (UV‐Visible), Fourier Transform Infrared (FTIR) Spectroscopy, High‐Resolution Mass Spectrometry (HRMS), and elemental analysis. The b

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., Reham G. Elkomy. "Antimicrobial screening of silver nanoparticles synthesized by marine cyanobacterium Phormidium formosum." Iranian Journal of Microbiology, June 16, 2020. http://dx.doi.org/10.18502/ijm.v12i3.3242.

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Background and Objectives: Nanoparticles are widely used in various fields such as electronics, cosmetics, water purifica- tion, biomedical and biotechnology. Biosynthesis of nanoparticles using biological agents have gained much attention in the area of nanotechnology in the last few decades because of cost effective, non-toxic, and eco-friendly. Algae have been used to reduce metal ions and subsequently for the biosynthesis of nanoparticles. Materials and Methods: Silver nanoparticles (AgNPs) have been biosynthesized by Phormidium formosum isolated from Mediterranean Sea coast Egypt in

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Tomoaia-Cotisel, Maria, Attila-Zsolt Kun, Csaba-Pál Rácz, et al. "Enhanced stability of curcumin and polyethylene glycol composites in the presence of flavonoids and whey protein concentrate: synthesis, structural evaluation and thermal analysis." Journal of Thermal Analysis and Calorimetry, February 22, 2025. https://doi.org/10.1007/s10973-025-14111-0.

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Abstract Curcumin (CCM) is a natural polyphenol with promising pharmacological potential. This potential is severely restricted, however, due to its limited bioavailability, poor solubility and stability. To address this, several systems of curcumin and polyethylene glycol, PEG (PEG4000 or PEG6000), were synthetized, with or without whey protein concentrate (WPC), trans-resveratrol (RES) or silymarin (SIL) using solid dispersion technique. Firstly, CCM-PEG composites were synthesized using PEG4000 or PEG6000 for 1:8 mol ratio by polymer melting method. Further, the CCM-WPC-PEG4000 composite fo

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Kumar, R., B. Bhattacharya, T. Agarwal, and S. Chakkaravarthi. "Trans Fatty Acid Analysis of Frying Oil Using ATR-FTIR Spectroscopy: A Study on Indian Traditional Snack Foods." Journal of Food Quality and Hazards Control, May 30, 2020. http://dx.doi.org/10.18502/jfqhc.7.2.2887.

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Background: Trans Fatty Acid (TFA) content in oil is an important quality parameter due to its adverse health effect. This study was aimed to examine the TFA content in the frying oil used by street food vendors in India for two traditional snack foods. Methods: Totally, 143 oil samples were collected at different frying times (0, 2, and 4 h) from five different vendors for Samosa and Jalebi. TFA levels of the oil samples were analyzed by Attenuated Total Reflection-Fourier Transform Infrared Spectroscopy (ATRFTIR). Statistical analyses were carried out using SPSS software version 23.0.&

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Sasmaz, Hatice Kubra, Eda Adal, Pınar Kadiroğlu, Serkan Selli, Turkan Uzlasir, and Hasim Kelebek. "Optimization of complex coacervation parameters for the production of encapsulated black garlic using response surface methodology." Journal of Food Science, October 2, 2023. http://dx.doi.org/10.1111/1750-3841.16768.

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AbstractThe purpose of this study was to optimize black garlic encapsulation parameters (core/coating ratio, extract concentration, and coacervate/maltodextrin [MD] ratio) using central composite design of the response surface methodology based on encapsulation efficiency (EE) (%). The optimum parameters were determined as 4.0 for the coating material/core ratio, 50% for the extract concentration, and 6.0 for the MD/coacervate ratio depending on the EE (%). The antioxidant activity values were determined as 101 and 134 µmol Trolox/100 g dry weight (DW) for the 2,2‐diphenyl‐1‐picrylhydrazyl and

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Ganić, Tea, Stefana Vuletić, Biljana Nikolić, et al. "Cinnamon essential oil and its emulsion as efficient antibiofilm agents to combat Acinetobacter baumannii." Frontiers in Microbiology 13 (October 10, 2022). http://dx.doi.org/10.3389/fmicb.2022.989667.

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Acinetobacter baumannii is an emerging nosocomial pathogen resistant to a wide spectrum of antibiotics, with great potential to form a biofilm, which further aggravates treatment of infections caused by it. Therefore, searching for new potent agents that are efficient against A. baumannii seems to be a necessity. One of them, which has already been proven to possess a wide spectrum of biological activities, including antimicrobial effect, is cinnamon essential oil. Still, further increase of antibacterial efficacy and improvement of bioavailability of cinnamon oil is possible by emulsification

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Chen, Hongmei, Fengyi Chen, Hui Chen, Hongsheng Liu, Ling Chen, and Long Yu. "Thermal degradation and combustion properties of most popular synthetic biodegradable polymers." Waste Management & Research: The Journal for a Sustainable Circular Economy, October 15, 2022, 0734242X2211290. http://dx.doi.org/10.1177/0734242x221129054.

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Various products made from biodegradable polymers have been increasing rapidly in the market since the use of non-biodegradable materials has been banned, particularly for the disabled packaging materials. Burning remains the most popular method that is increasingly used in treating city wastes. The impact of these polymers on environmental during thermal degradation and combustion is an important issue for city waste management. In this work, the thermal degradation and combustion behaviours of the most popular synthetic biodegradable polymers in the market, poly(lactide acid) (PLA), poly(e-c

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Chung, Chen-An, and Yuan-Pern Lee. "Infrared characterization of formation and resonance stabilization of the Criegee intermediate methyl vinyl ketone oxide." Communications Chemistry 4, no. 1 (2021). http://dx.doi.org/10.1038/s42004-020-00447-1.

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AbstractMethyl vinyl ketone oxide (MVKO) is an important Criegee intermediate in the ozonolysis of isoprene. MVKO is resonance stabilized by its allyl moiety, but no spectral characterization of this stabilization was reported to date. In this study, we photolyzed a mixture of 1,3-diiodo-but-2-ene and O2 to produce MVKO and characterized the syn-trans-MVKO, and tentatively syn-cis-MVKO, with transient infrared spectra recorded using a step-scan Fourier-transform spectrometer. The O‒O stretching band at 948 cm−1 of syn-trans-MVKO is much greater than the corresponding bands of syn-CH3CHOO and (

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