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Spatially resolved oxidation of nanocrystalline silicon surfaces has been studied using Fourier Fourier-transformed infrared microscopy. At the same time, photoluminescence (PL) quenching has been recorded. Both characteristics are related to the increase of silicon oxide species on the sample surfaces. Illumination of surfaces by blue light increases oxidation rates and speeds PL quenching in the form of a stretched exponential function. A possible explanation of this behavior considering quantum dots and quantum wires present in the material is proposed. [ABSTRACT FROM AUTHOR]

Utilizing the solution casting technique, polymer nanocomposites (PNCs) films including polyethylene oxide and chitosan (PEO/CS) doped with titanium dioxide nanoparticles (TiO2 NPs) as nanoceramic were successfully synthesized. The study investigated how varying TiO2 nanoparticle concentrations influenced the structural, optical properties, and antibacterial activity of the polymeric matrix. XRD patterns revealed an increase in the amorphous nature of the polymer blend as the content of TiO2 NPs inside the PEO/CS blend grew. The FT-IR analysis confirmed the interaction between TiO2 NPs and the PEO/CS blend. This confirmation is attributed to the observed vibrational changes upon the incorporation of TiO2 dopant into the polymer matrix. The UV–visible spectrum aided in the determination of optical energy band gaps (both direct and indirect), showing reductions in both Egd and Egin with higher TiO2 concentrations. SEM highlighted the partial compatibility between PEO/CS and TiO2, while transmission electron microscopy depicted spherical TiO2 NPs with diameters ranging from approximately 9 to 25 nm. Antimicrobial assessments indicated heightened efficacy in all nanocomposite samples compared to the pure PEO/CS composite, with a linear correlation to the quantity of TiO2 nanoparticles present. These findings strongly suggest the potential of these nanocomposites for food packaging applications. [ABSTRACT FROM AUTHOR]

The present study referred to the lightweight cenosphere filled, and epoxy composites (0, 7.5, 15, and 22.5 vol.%.) developed with the help of the hot compression moulding process. To ensure the strength of composites, the prepared system was analyzed with tensile, flexural, impact properties, and dynamic mechanical characteristics discussed. Cenosphere-filled composites attained the maximum tensile strength of 19.5 MPa, which is 60% better than the neat epoxy. Adding cenosphere particles increases the tensile, flexural, and impact strength at a superior level. Dynamic mechanical analysis revealed that in 22.5 vol.% of cenosphere reinforced composites, energy dissipation and maximum storage modulus of 6 MPa was enhanced. The surface morphologies of the fractured specimens were characterized using scanning electron microscope (SEM). The morphological investigations indicate a good state of particle distribution in the epoxy matrix. [ABSTRACT FROM AUTHOR]

Forensic entomology plays an important role in medicolegal investigations by using insects, primarily flies, to estimate the time of colonization. This estimation relies on the development of the flies found at the (death) scene and can be affected (and sometimes corrected) by external factors, such as temperature and humidity, and internal factors, such as species and sex. This study leverages infrared (IR) spectroscopy combined with machine learning models—Partial Least Squares Discriminant Analysis (PLS‐DA) and eXtreme Gradient Boosting trees Discriminant Analysis (XGBDA)—to differentiate between male and female Cochliomyia macellaria larvae, commonly found on human remains. Significant vibrational differences were detected in the infrared spectra of third instar C. macellaria larvae, with distinct peaks showing variations in relative absorbance between sexes, suggesting differences in biochemical compositions such as cuticular proteins and lipids. The application of PLS‐DA and XGBDA yielded high classification accuracies of about 94% and 96%, respectively, with female spectra consistently having higher sensitivity than males. This non‐destructive approach offers the potential to refine supplemental post‐mortem interval estimations significantly, enhancing the accuracy of forensic analyses. [ABSTRACT FROM AUTHOR]

The 2,4,6-trifluoro-5-chloro pyrimidine (TF5CP) was chosen for extensive investigation of its theoretical and experimental vibrational assignments, structural benchmarks, and spectroscopic (FT-IR, FT-Raman, UV–Vis, and NMR) investigations by Hartree–Fock (HF) functional with 6-311 + G(2d,p) basis set. The spectrum of detailed vibrational interpretation was to be provided by the MOLVIB software. Bonding orbitals participate in all stages of natural bond orbitals (NBO) analysis as donors and acceptors, which stabilizes molecules through intermolecular charge transfer. Molecular docking research was used to foresee the binding interactions of the TF5CP derivative with the receptor 3WZD. Auto-dock software was used to a conduct receptor–ligand docking investigation. According to the molecular docking results, the highest mean negative binding affinity (–5.639 kcal/mol) was exhibited by the current chemical. Based on the five-point rule of Lipinski, drug similarity was determined, and the ADMET variables were also predicted. [ABSTRACT FROM AUTHOR]

Densities (ρ), speeds of sound (u), and viscosities (η) were derived for three distinct binary mixtures comprising allyl alcohol in conjunction with chlorinated methanes. The Exploration ranged from 303.15 K to 313.15 K, at atmospheric pressure across all composition. The empirical data from the measurements formed the foundational basis for the determination of excess molar volume, excess isentropic compressibility, viscosity deviation and excess Gibbs free energy with the activation of viscous flow. We computed partial molar and infinite dilution properties for each binary system. The results are interpreted in the forming complexes, chemical forces and specific interactions with binary mixtures. The implication drawn from the application of the Jouyban-Acree model are expounded, taking into account the mean relative deviation (MRDs) and individual relative deviation (IRD) between the calculated and experimental densities, speed of sound, and viscosities as a criterion for accuracy criterion. FTIR studies validate experimental findings in investigated mixtures. [ABSTRACT FROM AUTHOR]

Densities (ρ), speeds of sound (u) and viscosities (η) were measured for three binary mixtures of propargyl alcohol with tetra chloromethane, trichloromethane, and dichloromethane from 303.15 K to 313.15 K at atmospheric pressure across the composition range. Excess molar volume, excess isentropic compressibility, deviation in viscosity, and excess Gibbs free energy of activation of viscous flow were calculated. Partial molar properties and infinite dilution molar partial properties were also determined for each system. Results suggest heteroassociates forming cross complexes and chemical forces with specific interactions. PFP theory was used to identify the predominant molecular interactions. The Jouyban–Acree model findings were discussed, considering mean relative deviation (MRDs) and individual relative deviation (IRD) between calculated and experimental data. FTIR studies were included to corroborate the experimental findings. [ABSTRACT FROM AUTHOR]

Late and Inca period pottery in the Northwestern Argentine region present two or three characteristic prefiring colors (red, black, and white or cream) in their decoration. Sanagasta and Belén vessels from Late Period are characterized by a bichrome black‐on‐red/cream and black‐on‐red painted decoration, respectively, whereas Inca vessels exhibit a black‐on‐red painted decoration. Analytical results obtained by μRaman, FT‐IR, and XRD analyses on a relatively large number of samples show that the pre‐Hispanic potters during Late and Inca periods used a manganese‐based technique to obtain black colours in these large vessels fired in an oxidising atmosphere. Black paints were produced by the systematic use of different mineral complex mixtures of Mn (pyrolusite, bixbyte, and hausmannite) and hematite. As a result, spinel phases like jacobsite (a Fe‐Mn compound) and magnetite were formed at different firing temperatures. Red paints were obtained using the mineral hematite. A detailed discussion is presented concerning the firing conditions to obtain these black hues. [ABSTRACT FROM AUTHOR]

Since concrete is exposed to chemical, mechanical, or physical deteriorating effects simultaneously or successively under environmental conditions, this study focused on the durability of geopolymer concretes containing ground blast furnace slag (GGBFS) and fly ash (FA) under the effects of sulfate and salt after elevated temperatures. For this aim, five FA‐based geopolymer concrete mixtures with different GGBFS contents were produced and cured at 90°C for 72 h. First, the produced samples were exposed to 200, 400, 600, and 800°C for 2 h. Then, the samples were put into 5% sodium sulfate (Na2SO4) and 5% sodium chloride (NaCl) solutions for 30 days. The impacts of elevated temperature + Na2SO4 and elevated temperature + NaCl on geopolymer concrete were investigated by compressive strength, mass loss, visual examination, capillary water absorption, x‐ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT‐IR). As a result, although cracking or strength decreases in concrete have been observed after only elevated temperatures, it has exhibited significant resistance to the integrated deterioration influences, has not disintegrated, and maintained its integrity under appropriate mix design and curing conditions. Shortly, the results demonstrated the ability of geopolymer concrete subjected to elevated temperatures with acceptable strength and durability under chemical effects, even if left for a short time. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the degree of conversion (DC), Vickers microhardness (VHN), main components and surface properties of a microhybrid and two bulk-fill composite resins polymerized with second and third generation light emitting diodes (LED). Sixty cylindrical specimens of Filtek™ Bulk-Fill, everX Posterior (bulk technique) and Filtek Z250 (incremental technique) were prepared in plexiglass molds (5 mm in diameter and 4 mm in thickness) and cured with second-generation LED (Woodpecker LED.B) and third-generation LED (Valo) resulting in six groups (n = 10). DC was determined using Fourier transform infrared spectroscopy (FT-IR), and VHN with Vickers microhardness tester. The main components were identified by means of energy-dispersive X-ray spectroscopy (EDX) microanalysis; whereas filler particles and surface properties were analyzed by scanning electron microscopy (SEM). VHN and DC data were analyzed using two-way ANOVA, followed by t-test with Bonferroni correction for pairwise comparison (p < 0.05). When DC and VHN values were evaluated, after polymerization with second and third generation LED, there was a statistical difference in bulk-fill composites, while there was no statistical difference in microhybrid composite. While, the highest DC and VHN values were obtained after polymerization of Filtek Z250 with Valo, the lowest DC and VHN values were obtained with Filtek Bulk-Fill with Woodpecker LED.B. The degree of conversion and microhardness are affected by the structure of the composite resin and LEDs. [ABSTRACT FROM AUTHOR]

• The study explores antifungal activity of leaf extract of Chenopodium album var. album L. • The ethyl acetate extract of C. album showed excellent antifungal activity against Candida strains • Fraction 2, isolated via column chromatography, exhibited potent antifungal activity against pathogenic Candida strains. • The chemical characterization of F2 fraction were evaluated through GC–MS Chenopodium album var. album L., renowned as lamb's quarters, is a versatile medicinal plant, revealing its efficacy in treating various ailments. This study evaluated the in vitro antifungal activity of ethyl acetate extract of C. album var. album L. Chenopodium album leaf extract demonstrated antifungal potential via the Agar well-diffusion and Broth-dilution method. Active fractions, obtained through column chromatography, were rigorously tested against Candida spp. The most potent fraction underwent detailed analysis with High-Performance Thin-Layer Chromatography (HPTLC), Gas Chromatography Mass Spectrometry (GC–MS), and Fourier-Transform Infrared Spectroscopy (FT-IR), for comprehensive characterization. The ethyl acetate extract (EAE) exhibited significant antifungal activity, with Candida albicans being the most susceptible (inhibition zone of 14.67 ± 0.58a). Fractionation of the EAE yielded a highly active F2 fraction, which showed a remarkable zone of inhibition against C. albicans (17.50 ± 1.00a). Comprehensive examinations, including HPTLC, GC–MS, and FT-IR, identified 12 compounds in the F2 fraction, and the major compounds were Furo [2,3- c ] pyridine, 2,3-dihydro-2,7-dimethyl, Bis (2-ethylhexyl) phthalate, and 2,3,4,4-Tretrapropyl-1-(trimethylsilyl)-1-(trimethylsilyloxy)-1,3-diaza-2,4-diborabutane. This study marks the first report of these 12 compounds identified from the F2 fraction of C. album. The present study highlights the antifungal activity of EAE and its fractions from C. album var. album that could be further explored for the selection of leads that may contribute to novel drug development. [ABSTRACT FROM AUTHOR]

Urolithiasis is a medically significant crystallization process affecting the urinary tract. Kidney stones exhibit considerable diversity as they form in complex environments containing various molecules and pathogens. Understanding the formation and occurrence of kidney stones is essential for developing strategies to prevent or reduce the invasiveness of treatments. In this study, we investigated over 300 cases of urolithiasis in Styria, Austria. The composition of the stones was evaluated using infrared spectroscopy and scanning electron microscopy. Most stones were found to be heterogeneous, predominantly composed of calcium oxalate, followed by calcium phosphate. Other components such as struvite, uric acid, and cystine were present to a lesser extent and were more likely to form homogeneous crystals. Analyzing the occurrence of these different stone types provides valuable insights into the formation processes of kidney stones and can aid in the prevention of urolithiasis in the future. [ABSTRACT FROM AUTHOR]

Background: Ayurveda emphasizes the balance of mind, body, and spirit, drawing on ancient texts that highlight the medicinal properties of herbs like Withania somnifera, known for its wide range of therapeutic applications and pharmacological benefits. Commonly referred to as Indian ginseng or Ashwagandha, Withania somnifera, demonstrates a variety of therapeutic effect, including anti-inflammatory, antitumor, sedative, hypnotic, deobstruent effects, narcotic, antioxidant, tonic, antistress, diuretic, aphrodisiac, immunomodulatory, and rejuvenating properties. Nanotechnology, particularly through the development of nanosuspensions, offers a significant advancement in medicine, addressing challenges like poor solubility and low bioavailability of lipophilic drugs. Nanosuspensions can enhance drug safety and efficacy by improving solubility and altering pharmacokinetics. Methods: This study focuses on formulating and characterizing a nanosuspension using an ethanolic extract of Withania somnifera roots. The nanosuspension (NSWS) underwent comprehensive characterization, utilizing techniques such as FT-IR spectroscopy, particle size analysis, zeta potential measurement, polydispersity index (PDI) assessment, Field emission scanning electron microscopy (FESEM), X-ray diffraction analysis, pH measurement, and stability testing. This study seeks to explore the potential of nanosuspensions, aiming to integrate nanotechnology with herbal medicine to improve the safety and efficacy of herbal formulations. Results: The nanosuspension (NSWS) shown particle size about 133.09 nm, and its uniform particle distribution was indicated by a Polydispersity Index (PDI) about 0.27. Stability and uniformity were further supported by the zeta potential, particle size, and PDI values. Conclusion: Nanosuspension formulations represents a versatile strategy to improve the therapeutic efficacy of hydrophobic drugs across various routes of administration. [ABSTRACT FROM AUTHOR]

Hydrothermal treatment of wood, particularly steaming with saturated water steam, is often used to achieve a more intensive and homogenous wood color or to vary its hue. However, information on pear wood (Pyrus communis L.) steaming is limited in the available literature. This paper investigates the influence of steaming on the color of pear wood. Green, water-saturated samples of pear wood heartwood and sapwood were steamed with saturated water steam for 24 h at 98 °C. The color of the heartwood and sapwood was assessed both visually and with a standard three-stimulus colorimeter using the CIEL*a*b* system, and compared to the natural color of pear-wood. Additionally, FT-IR spectrometry was employed to analyze chemical changes in the wood samples. The results showed that both heartwood and sapwood experienced a decrease in lightening (L*), an increase in redness (a*), and a decrease in yellowness (b*) during steaming. Furthermore, a trend toward the equalization of L*, a*, and b* parameters between heartwood and sapwood over time was observed. FT-IR spectroscopy revealed that the chemical changes during steaming were primarily related to extractives and hemicelluloses, with no significant changes in cellulose and lignin. The obtained results suggest that pear wood color can be equalized to some extent by steaming and that the extent of the color change to darker tones is dependent on steaming time. [ABSTRACT FROM AUTHOR]

Background: Dissection of complex plant cell wall structures demands a sensitive and quantitative method. FTIR is used regularly as a screening method to identify specific linkages in cell walls. However, quantification and assigning spectral bands to particular cell wall components is still a major challenge, specifically in crop species. In this study, we addressed these challenges using ATR-FTIR spectroscopy as it is a high throughput, cost-effective and non-destructive approach to understand the plant cell wall composition. This method was validated by analysing different varieties of mungbean which is one of the most important legume crops grown widely in Asia. Results: Using standards and extraction of a specific component of cell wall components, we assigned 1050–1060 cm−1 and 1390–1420 cm−1 wavenumbers that can be widely used to quantify cellulose and lignin, respectively, in Arabidopsis, Populus, rice and mungbean. Also, using KBr as a diluent, we established a method that can relatively quantify the cellulose and lignin composition among different tissue types of the above species. We further used this method to quantify cellulose and lignin in field-grown mungbean genotypes. The ATR-FTIR-based study revealed the cellulose content variation ranges from 27.9% to 52.3%, and the lignin content variation ranges from 13.7% to 31.6% in mungbean genotypes. Conclusion: Multivariate analysis of FT-IR data revealed differences in total cell wall (600–2000 cm−1), cellulose (1000–1100 cm−1) and lignin (1390–1420 cm−1) among leaf and stem of four plant species. Overall, our data suggested that ATR-FTIR can be used for the relative quantification of lignin and cellulose in different plant species. This method was successfully applied for rapid screening of cell wall composition in mungbean stem, and similarly, it can be used for screening other crops or tree species. [ABSTRACT FROM AUTHOR]

Plastic pollution has become a growing concern for environmental and human health in recent years. Currently, research suggests that soil compartments might be highly contaminated, with compost being one of the major sources for plastic contamination, especially at reduced sizes. In Geneva, microplastic contamination has already been evaluated in industrial compost but not yet in field-side compost. Therefore, this work focuses on the evaluation of concentrations and the characterization of microplastic particles (MPs) in field-side compost in Geneva. Four different field-side composts were sampled in Geneva and sieved with sizes ranging from >5 mm to 0.5 mm. The MPs were visually sorted when possible, and the smaller ones were treated by digestion and density separation processes. All of the MPs were analyzed with infrared spectroscopy. The results (sizes > 5 mm to 1.25 mm) reveal concentrations between 195 ± 64 and 1315 ± 375 plastic particles/kg of compost and the presence of conventional plastics in every compost. MPs were present in almost every size fraction for the four composts, and the origin of waste seemed to influence their concentrations. Indeed, composts free from organic household waste had lower concentrations than the ones accepting that kind of waste. Littering and waste still wrapped in plastic were also noticed for the composts with higher concentrations of MPs. The characterization results highlight the variety of plastic types among the composts, mostly represented by PE (polyethylene), PVA (polyvinyl alcohol), PP (polypropylene), and DAIP (polydiallyl iso-phthalate) in general but also specific contamination by PEMA (poly ethyl methacrylate) for only one of the composts. Further work is needed to evaluate the distribution of MPs according to their size or the types of waste used in composting, especially the potential degrading conditions of plastics, to mitigate their presence in composts. [ABSTRACT FROM AUTHOR]

Various methods are applied to improve the quality of cement and concrete. Many efforts are made to enhance their quality by introducing additional compounds that can stabilize the chemical bonds between their components. Significant effects on hydrogen bonds under the influence of magnetic and electromagnetic waves have been observed. Results have been published with permanent magnetic fields for water treatment for concrete preparation with magnetic inductions B = 4000, 6000, 6000, 9000, and 9250 Gauss. Electromagnetic (e. m.) treated water has emerged as a promising approach for improving the properties of construction materials. Our investigation concerns the properties of concrete. Concrete is a composite building material mainly consisting of cement, aggregates, water, and various chemical additives. Water was activated with electromagnetic fields from solenoid, ranging from 20 to 40 kHz. The study employs Fourier Transform Infrared (FT-IR) spectroscopy analysis and the Scanning Electron Microscope (SEM) method. The experiments were performed on samples and control samples. The control samples were obtained with water before activation with EM fields. Treating the water in concrete preparation with electromagnetic fields leads to greater mixture homogeneity. SEM images substantiate this outcome. The FT-IR peaks are linked to heightened chemical reactivity from improved water parameters attributed to the treatment with the EVOdrop device. [ABSTRACT FROM AUTHOR]

Plants play an important role in nanoparticle preparation because they are easily accessible, environmentally friendly, and inexpensive. In this study, we used an ethanolic extract of Mangifera indica seed as a reducing and stabilising agent to create zinc oxide (ZnO) nanoparticles (NPs). The ZnO NPs were examined using characterization techniques such as UV-Vis, Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The interaction of phytochemical constituents from plant extracts providing the biological reduction of zinc metal ions to ZnO had been identified by the UV-visible absorption studies. According to the FT-IR results, metal oxides exhibited interatomic vibration-driven absorption in the fingerprint area below 1000 cm–1. Particles appeared to be crystalline and also a rice-grain shape of ZnO NPs was confirmed by XRD, SEM, and TEM, respectively. In addition, the cytotoxic effect of ZnO NPs was checked using the SKMEL-28 cell line, showing an IC50 value of 32.686 μg/mL in the SKMEL-28 cell line, and 49.011 μg/mL in the typical L6 cell line. Furthermore, the synthesized NPs were subjected to (AO/EB) double staining approach to examine the apoptotic activity. The acridine orange/ethidium bromide method made strong evidence for demonstrating chromatin condensation and membrane blebbing. [ABSTRACT FROM AUTHOR]

In this research, physical and mechanical properties, as well as color changes and FT-IR analyzes of 13 different wheat varieties, which are intensively produced, were examined. For this purpose, Altay, Harmankaya, Çetinel, Yunus, Mufitbey, Soyer 02, Dumlupınar, Bezostaja, Sönmez, ES-26, Reis, Karaman2000, and Nacibey varieties were used. As a result of the research the Soyer-02 variety exhibited the largest seed width (3.42 mm) and thickness (2.96 mm), while the Müfitbey variety had the smallest width (2.72 mm) and thickness (2.36 mm). Dumlupınar showed the greatest seed length (7.82 mm), with Müfitbey having the shortest (6.07 mm). Surface area was greatest in Dumlupınar (53.35 mm²) and lowest in Müfitbey (36.03 mm²). Arithmetic and geometric mean diameters were largest in Dumlupınar (4.61 mm and 4.12 mm, respectively), with Müfitbey showing the smallest (3.72 mm and 3.54 mm). Sphericity ranged from 61.22% in Reis to 52.67% in Dumlupınar. The thousand-kernel weight varied significantly, with Reis recording the highest (46.36 g) and Altay the lowest (33.58 g). Fracture resistance was highest in Dumlupınar and Bezostaja (10.89 N to 11.3 N), with the lowest in Altay (5.89 N). Color analysis revealed L values ranging from 63.77 in Çetinel to 51.16 in Harmankaya, with all varieties showing positive 'a' values, indicating red tones, and 'b' values indicating yellow tones, with Soyer-02 having the highest (32.81) and Harmankaya the lowest (24.68). FT-IR analysis revealed broad O-H stretch vibrations (3270-3300 1/cm) in Müfitbey, Altay, Soyer, and Reis, suggesting high moisture or phenolic content. Amide I (1640-1650 1/cm) and Amide II (1540-1545 1/cm) bands in Bezostaja, Yunus, Dumlupınar, and Çetinel indicated high protein content. Aliphatic C-H stretch vibrations (2920-2925 1/cm and 2850-2854 1/cm) in ES-26 and Karaman 2000 suggested high lipid content, while carbohydrate-specific C-O and C-C stretch vibrations (1000-1240 1/cm) in Sönmez and Harmankaya suggested high starch content. [ABSTRACT FROM AUTHOR]

Polyhydroxyalkanoates (PHAs) constitute a principal group of bio-degradable polymers that are produced by certain microbes under limited supply of nutrients. PHA is a linear polyester that comprises of 3-hydroxy fatty acid monomers. Triacylglycerol acylhydrolases are known to catalyze the hydrolysis of ester linkages and in turn they are beneficial in the degradation of PHA. In present study, lipase-catalyzed degradation of PHA synthesized by Priestia megatarium POD1 was monitored. A gene from thermotolerant Bacillus subtilis TTP-06 that was capable of expressing lipase enzyme was amplified by PCR, cloned into a pTZ57R/T-vector, transferred to an expression vector pET-23a (+) and expressed in Escherichia coli BL21 (DE3) cells. The recombinant enzyme purified to 19.37-fold had a molecular weight of 30 kDa (SDS-PAGE analysis). Scanning Electron Microscopy (SEM) revealed changes in the surface morphology of native and treated PHA films. Further, changes in molecular vibrations were confirmed by Fourier Transform Infrared Spectroscopy. [ABSTRACT FROM AUTHOR]

Lithium-ion batteries (LIBs) are employed in a range of devices due to their high energy and power density. However, the increased power density of LIBs raises concerns regarding their safety when subjected to external abuse. The thermal behavior is influenced by a number of factors, i.e., the state of charge (SoC), the cell chemistry and the abuse conditions. In this study, three distinct cylindrical Li-ion cells, i.e., lithium nickel cobalt aluminum oxide (NCA), lithium titanate oxide (LTO), and lithium iron phosphate (LFP), were subjected to thermal abuse (heating rate of 5 °C/min) in an air flow reactor, with 100% SoC. Venting and thermal runaway (TR) were recorded in terms of temperature and pressure, while the emitted products (gas, solid, and liquid) were subjected to analysis by FT-IR and ICP-OES. The concentrations of the toxic gases (HF, CO) are significantly in excess of the Immediate Danger to Life or Health Limit (IDLH). Furthermore, it is observed that the solid particles are the result of electrode degradation (metallic nature), whereas the liquid aerosol is derived from the electrolyte solvent. It is therefore evident that in the event of a LIB fire, in order to enhance the safety of the emergency responders, it is necessary to use appropriate personal protective equipment (PPE) in order to minimize exposure to toxic substances, i.e., particles and aerosol. [ABSTRACT FROM AUTHOR]

Punica granatum (Pomegranate) is widely accessible and used by natural health professionals for a range of medicinal purposes. The purpose of the current study to use a derivatization method in conjunction with FT-IR, colorimetry, and UV-Visible spectroscopy to determine the total phenolic and flavonoid content of various pomegranate sections. Pomegranate is used to treat ulcers, diarrhoea, Male infertility and so on. Currently, pomegranate is marketed in different novel drug formulations such as nanoparticles for local mucosal drug delivery, niosomes, hydrogels for chronic ınflammation, microemulsion for skin care and analytical techniques using HPLC, GC and GC-MS, LC-MS for carrying out the various quantitative and qualitative analyses are some examples of these developments. In this study, a part of pomegranate was extracted and evaluated by using Microscopical and Macroscopical evaluation, Fluorescence Analysis, FT-IR studies using derivatisation method and finally quantified the phenol and flavonoid content using UVVisible Spectroscopy. Results of the study revealed that the pomegranate extract gives data about the linearity, precision, accuracy of peel and bark ethanolic and aqueous extract gives linearity 1-5µg/ml, Regression 0.998, LOD 0.691µg/ml, LOQ 1.32µg/ml. Through the appropriate selection of Solvents, we successfully developed a stable and effective method for the determination and estimation of phenol and flavonoid content by derivatization and FTIR studies. Method was developed, optimized and validated with its parameters. [ABSTRACT FROM AUTHOR]

Background and aims: This study investigated the biochemical components present in the leaves of Cissus assamica. The primary aim was to analyze these components using advanced techniques and assess their potential therapeutic applications. Methodology: Fourier Transform Infrared (FT‐IR) spectroscopy, Gas Chromatography‐Mass Spectrometry (GC‐MS), and Mass Spectral analysis were employed to identify and characterize the compounds in Cissus assamica leaves. The mass spectra of each compound were compared with data from the Wiley and NIST libraries to determine their names, molecular masses, and chemical structures. FT‐IR analysis identified characteristic functional groups by their specific frequencies. Results and discussion: FT‐IR spectroscopic analysis revealed significant molecular vibrations at frequencies of 3265.63, 2853.81, 1638.60, 1469.21, and 1384.95 cm⁻¹, indicating the presence of specific functional groups. The GC‐MS analysis identified distinct compounds, such as "aR‐Turmerone," "Curlone," "7,8‐Epoxylanostan‐11‐ol, 3‐acetoxy‐," "13‐Docosenamide, (Z)‐," "Phenol, 3,5‐bis(1,1‐dimethylethyl)‐," "9,19‐Cyclolanostan‐3‐ol, 24,24‐epoxymethano‐, acetate," and "Quinoline‐5,8‐dione‐6‐ol, 7‐[[(4‐cyclohexylbutyl)amino]methyl]‐." These compounds exhibited potential therapeutic applications. Their cytotoxic, antimicrobial, antidiarrheal, anti‐hyperglycemic, and pain‐relieving properties were evaluated by comparing them with reference ligands targeting specific receptors, including dihydrofolate reductase (DHFR), epidermal growth factor receptor (EGFR), kappa opioid receptor (KOR), glucose transporter 3 (GLUT 3), and cyclooxygenase 2 (COX‐2). Conclusion: The results of this study suggest that Cissus assamica leaves contain bioactive compounds with potential therapeutic benefits for treating infections, diarrhea, hyperglycemia, and pain. However, further research is needed to conduct comprehensive phytochemical screening and establish the precise mechanisms of action for the crude extract or the plant‐derived compounds. Highlights: Compound isolation and characterization of the plant Cissus assamica was done by GC‐MS/MS and FTIR analyses.A total of 15 Phytochemicals were identified.In silico analysis of the identified phytochemicals were carried out for the evaluation of antidiarrheal, analgesic, hypoglycemic, anticancer and antimicrobial potentiality of the compounds.ADME/T were shown to observe potential drug likeliness. [ABSTRACT FROM AUTHOR]

Featured Application: Staphylococcus epidermidis CECT 4183 presents a good capacity for its application in the bioremediation of Cu(II) in contaminated water, and at the same time, its cellular extract has a good capacity to synthesize CuO-NPs with potential applications in nanomedicine. Copper contamination of natural waters is a global problem that affects ecosystems and public health, yet this metal is an essential micronutrient and has important applications. The efficacy of Staphylococcus epidermidis CECT 4183 as a Cu(II) biosorbent in synthetic solutions and its potential ability to synthesize CuO nanoparticles (CuO-NPs) from its cellular extract was investigated. In addition, the biocidal potential of the nanoparticles was evaluated against five microorganisms. Using response surface methodology, the optimal operating conditions were determined to be biomass dose, 0.2 g/L, and pH 5.5. Equilibrium tests were performed, and biosorption isotherms were obtained for four models with a maximum biosorption capacity of 48.14 mg/g for the Langmuir model. Different spectroscopic and microscopic techniques were used to determine the mechanisms involved in the biosorption process, which was dominated by surface physicochemical interactions with strong involvement of methyl, methylene, carbonyl, amino, and phosphate groups. The techniques also allowed for characterizing the obtained nanoparticles, which had a quasi-spherical morphology and an average size of 14 nm. Finally, biocidal tests showed that the CuO-NPs had a good inhibitory capacity for the microorganisms tested, with minimum inhibitory concentrations (MIC) between 62.5 and 500 µg/mL for bacteria and between 1000 and 2000 µg/mL for yeasts. S. epidermidis CECT 4183 showed good potential for Cu(II) bioremediation and for the synthesis of CuO-NPs with biocidal capacity. S. epidermidis CECT 4183 showed good potential for use in Cu(II) biosorption, and its cell extract presented a high capacity for the green synthesis of CuO-NPs, which at the same time turned out to be good biocidal agents. [ABSTRACT FROM AUTHOR]

The research addresses challenges in food safety related to the migration of contaminants from plastics to food. It focused on the physicochemical and sensory degradation of olive oils packaged in polyethylene terephthalate (PET) and subjected to thermal exposure at 40 °C and 60 °C for several weeks and a subsequent 12 months of storage, as well as the stability and migration of compounds from the PET packaging itself. Olive oils (OO) from Spanish supermarkets (a mixture of refined and virgin, with commercial identifications of mild and intense) were selected and subjected to thermal treatments at 40 °C and 60 °C for 1, 2, and 3 weeks, followed by 12 months of storage. The treatments were conducted through the following two independent experiments: Experiment A focused on immediate analysis post-thermal treatment, while Experiment B included a 12-month storage period post-thermal treatment. The presence of antimony (Sb) was analyzed using acid digestion with nitric acid (HNO3) and high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS), while the metals cadmium (Cd), copper (Cu), lead (Pb), and iron (Fe) were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). The PET characterization was assessed using Fourier transform infrared spectroscopy in the mid-infrared range (FT-IR/MIR), carbonyl index, and differential scanning calorimetry (DSC). The results showed increases in the acidity index by 0.29%, the peroxide value by 25.92%, and the K268 coefficient by 51.22% between the control sample and the most severe treatments, with more pronounced effects observed after 12 months. Sensory quality declined, with reduced intensity of the "fruity" attribute and increased presence of the "rancid" defect. PET degradation was reflected in an increase in the carbonyl index and greater structural amorphization. Fe was the predominant metal, and Sb concentration increased after thermal treatments. The lack of studies on the raw consumption of oils packaged in PET and the concerns about the migration of compounds from the packaging to the food highlight the relevance of this research. This study provides new insights into the effects of thermal exposure and storage on the migration of PET contaminants into oils, contributing to the development of strategies to ensure food safety and product quality. [ABSTRACT FROM AUTHOR]

Developing the most reliable and eco-friendly techniques for nanoparticle synthesis is an emerging step in green nanotechnology. Intending to avoid the potential risks of harmful substances for a safe environment, research on environmentally friendly methods of generating metal/metal oxide nanoparticles (NP) is increasing. In this study, the aqueous leaf extract of Elephantopus scaber was used to create bimetallic nanoparticles (Ag-ZnO), and the synthesized Ag-ZnO NPs were characterized for their physical and chemical properties. Different spectroscopic and microscopic methods, including UV–visible spectroscopy, FTIR, scanning electron microscopy (SEM), EDX, and XRD, were used to characterize the synthesized Ag-ZnO NPs. SEM revealed the nanoparticles' irregular shape, and FTIR demonstrated that secondary metabolites served as capping and stabilising agents during the production of the particles. The antioxidant activity of biosynthesised bimetallic nanoparticles was determined using DPPH, hydroxyl and reducing power assays. The E. scaber-mediated Ag-ZnO NPs were tested for their antibiofilm, antibacterial, and antioxidant effects and are reported. The biosynthesised nanoparticles showed significant antioxidant activity of 62% at 500 µg/ml concentration. The results of antibacterial activity showed that MIC of biosynthesised Ag-ZnO NPs was 0.125 μg/ml against Staphylococcus aureus and Bacillus subtilis. The results of studying the antibiofilm activity of Ag-ZnO NPs showed that it was concentration-dependent. Results obtained from the present study indicate that the biosynthesised Ag-ZnO NPs using E. scaber leaf extract are eco-friendly and can be used as a good antibacterial, antibiofilm and antioxidant agent. [ABSTRACT FROM AUTHOR]

Over the year, garbage from industry establishments' everyday operations included several different sorts. For instance, among the most prevalent industrial wastes formed in India is sugarcane bagasse ash (SCBA). This study's main goal is to examine the possibilities for using SCBA in burnt clay bricks. Using mechanical and thermal characteristics, the impact of SCBA and ruthenium (Ru) nanoparticle additions to the brick production clay has been studied. To achieve this, combinations of brick-making clay containing 15 wt% SCBA and different weight portions of Ru nanoparticles (by 0, 1, 3, 5, and 7%) were hydraulically uniaxially squeezed and sintered at 1000 ℃. Compressive strength, thermogravimetric analysis (TGA), and a water absorption test were among the mechanical and thermal parameters that were assessed and contrasted. Using a scanning electron microscope, the microstructure of the specimen's interfacial layer was also investigated. Additionally, Fourier-transform infrared spectroscopy is used to examine the novel nano clay brick's chemical structure. A clay brick with up to 5 wt% Ru nanoparticles has greater compressive strength (32.6 MPa maximum) and thermal strength (8.8% wt loss) than a brick with 0 wt% (24.8 MPa and 31% wt loss), according to experimental results. However, the compressive and thermal strengths were decreased for 7% Ru nanoparticles brick (30.2 MPa and 9.1% wt loss). [ABSTRACT FROM AUTHOR]

Aiming at solving difficulties related to aero-engine classification and identification, two telemetry Fourier transform infrared spectrometers are utilized to measure the infrared spectra of six types of aero-engine hot jets, and create a spectral data set, which is divided into a training set (80%), a validation set (10%), and a prediction set (10%). A peak-finding Siamese convolutional neural network (PF-SCNN) is used to match and classify the spectral data. During the training stage, the Siamese convolutional neural network (SCNN) is designed to extract spectral features and calculate the distance similarity. In order to improve the efficiency of the SCNN, a peak-finding method is introduced to extract the spectral peaks, which are used to train the model instead of the original spectral data. During the prediction stage, the trained model is used to calculate the similarity between the prediction set and the combined set of the training set and validation set, and the label of the most similar training data in each prediction set is used as the prediction label. The performance measures of the classification results include accuracy, precision, recall, confusion matrix, and F1-score. The experimental results show that the PF-SCNN can achieve a high classification accuracy rate of 99% and can complete the task of classifying the infrared spectra of aero-engine hot jets. [ABSTRACT FROM AUTHOR]

Spent mushroom substrates (SMSs) and mushroom basal bodies (MBBs) are significant by-products because of their nutrient content even after harvesting. This study aimed to evaluate the effect of these two by-products, derived from Agaricus bisporus (Ab) and Cyclocybe cylindracea (Cc) cultivation, as potential growth and biochemical composition add-value enhancers of edible mushroom mycelia such as Pleurotus ostreatus, C. cylindracea, and Lentinula edodes. Fungal growth substrates enriched with SMS and MBB extracts significantly affected the growth of mushroom mycelia. In particular, on P. ostreatus, the MBBs Ab and Cc extracts determined an increase in mycelial weight by 89.5%. Also, by-products influenced mushrooms' mycelial texture, which appeared more floccose and abundant in growth. FT-IR analysis showed that L. edodes mycelium, grown on MBB substrates, showed the highest increase in bands associated with proteins and chitin. Results demonstrated that mushroom by-products enhance mycelial growth and confer an enrichment of compounds that could increase mycelial resistance to pathogens and make a nutraceutical improvement. [ABSTRACT FROM AUTHOR]

The segment character of polyurethanes (PUs) determines the micromorphology and properties. The effective segment regulation can customize the favorable performance of PUs. Herein, silicon covalent‐modified polyurethanes (MPUs) were prepared by incorporating diphenylmethane diisocyanate (MDI) and diphenyl silanediol (DPSD) into PU molecules as hard segments via a two‐step method. Distinctive microphase separation structures from sheet morphology to radial sheet or withered flower‐like microdomain were formed by adjusting hydrogen bonding of hard segments and post‐treatment techniques. Thus, with the addition of DPSD in hard segments, the thermo‐optic responses for MPUs occurred due to the different microphase evolution under thermal effect. And with the further addition of DPSD, the effect of thermal stimuli on the transmittance gradually weakened. It was very clear that with increasing the temperature, the transmittance of MPUs showed a gradual increase owing to melting the microcrystals or destroying the ordered accumulation of hard segments. Meanwhile, the high mechanical properties were obtained, higher 15 times tensile strength and more than 100 times elastic modulus than those of pure PU as well as the excellent thermal stability. In sum, this study was of great significance for developing new functionalized PU materials. Highlights: Polyurethanes were prepared by inducing modified silicon functionality.The distinctive microphase separation evolution of MPUs was found.Thermal stimuli responses showed a gradual decrease due to different structure.High mechanical properties and thermal stability were also obtained. [ABSTRACT FROM AUTHOR]

This study aimed to isolate bacteria from poultry droppings for the degradation of lowdensity polyethylene (LDPE). Poultry droppings were collected from the Instructional Livestock Farm Complex (ILFC), Veterinary College, Mhow, Madhya Pradesh, India. LDPE films were treated with UV rays for 48 hours and used for the study. Four isolates were identified by Gram's staining. In M9, K9, P9, and E9; one was identified as Gram-positive, and 3 were found as Gram-negative bacteria. Screening of bacteria for LDPE biodegradation was done by clear zone formation. Out of 4 isolates, P9 was identified as LDPE degrading bacteria. LDPE degradation was analyzed by gravimetric analysis using the weight loss method, the functional group was analyzed by Fourier transform infrared spectroscopy, and the surface was analyzed by scanning electron microscopy. LDPE films with isolate P9 showed significant weight loss (16.98%±0.47) after 60 days. FT-IR analysis showed a decrease (58.8%) in carbonyl index and changes in functional group vibrations indicating LDPE degradation. SEM image examination revealed bacterial colonization, biofilm formation, surface erosions, cracks, and pit formation on the surface of LDPE which was indicative of the degradation of LDPE film. Further, the identification of isolate P9 was done by BD Phoenix M50 automated identification system and 16S rRNA sequencing. Sequencing and phylogenetic analysis of the P9 isolate showed 99.76% similarity with Pseudomonas aeruginosa (OR921266.1). Our findings underscore the potential of strain P9 from poultry droppings to efficiently utilize LDPE as a sole carbon source, thereby contributing to its degradation. This is the first report of isolating LDPE-degrading bacteria from poultry droppings. It is crucial to analyze the poultry gut microbiota for plastic degradation since this discovery highlights the need for further investigation.

Abstract Background Dissection of complex plant cell wall structures demands a sensitive and quantitative method. FTIR is used regularly as a screening method to identify specific linkages in cell walls. However, quantification and assigning spectral bands to particular cell wall components is still a major challenge, specifically in crop species. In this study, we addressed these challenges using ATR-FTIR spectroscopy as it is a high throughput, cost-effective and non-destructive approach to understand the plant cell wall composition. This method was validated by analysing different varieties of mungbean which is one of the most important legume crops grown widely in Asia. Results Using standards and extraction of a specific component of cell wall components, we assigned 1050–1060 cm−1 and 1390–1420 cm−1 wavenumbers that can be widely used to quantify cellulose and lignin, respectively, in Arabidopsis, Populus, rice and mungbean. Also, using KBr as a diluent, we established a method that can relatively quantify the cellulose and lignin composition among different tissue types of the above species. We further used this method to quantify cellulose and lignin in field-grown mungbean genotypes. The ATR-FTIR-based study revealed the cellulose content variation ranges from 27.9% to 52.3%, and the lignin content variation ranges from 13.7% to 31.6% in mungbean genotypes. Conclusion Multivariate analysis of FT-IR data revealed differences in total cell wall (600–2000 cm−1), cellulose (1000–1100 cm−1) and lignin (1390–1420 cm−1) among leaf and stem of four plant species. Overall, our data suggested that ATR-FTIR can be used for the relative quantification of lignin and cellulose in different plant species. This method was successfully applied for rapid screening of cell wall composition in mungbean stem, and similarly, it can be used for screening other crops or tree species.

In this work, we have successfully fabricated a calcium titanate perovskite compound. The resulting CaTiO3 compound was studied by preparing samples by compacting it in a powder state and using a Pousson device. The distance between the planes dhkl, Miller indices (hkl), degree of crystallinity and amorphism, structure and lattice parameters of the calcium titanate perovskite compound were determined using an X-ray diffractometer. Also, according to the results of FT-IR analysis, the formation of CaTiO3 perovskite is confirmed as a result of the study of molecular vibrations. The main broad peaks are observed in the range of 680÷400 cm-1, the absorption band at the wave number of 543,93 cm-1 corresponds to the specific stretching vibrations of Ti-O bonds and indicates the formation of the CaTiO3 perovskite type structure implies. Based on the results of these measurements, it will be possible to use semiconductor compounds in the future to create nanofilms by magnetron sputtering.

Phytochemical analysis of Artemisia herba-alba Asso (Asteraceae) species has been carried out using fourier-transform infrared spectroscopy (FT-IR) technique and gas chromatography–mass spectrometry (GC-MS) analyses. FT-IR spectra of the aerial parts (buds AB, leaves AL and flowers AF) of A. herba-alba powder revealed the presence of 12 peaks, of which 11 common peaks characteristics of the three A. herba-alba studied aerial parts. Whereas, the peak of 1632 cm-1 [(assigned to Alkenyl C=C stretch-Olefinic (alkene) group)] was observed in AB and AF aerial parts and not in AL. As for GC-MS analysis, data revealed 12 & 10 chemical compounds classes in A. herba-alba buds extracts of which, Bicyclic monoterpenoids (37.026 & 49.022%) was presented as a major compound in methanolic and ethanolic buds extracts, respectively. Whereas, 17 & 14 chemical compounds classes were detected in A. herba-alba leaves extracts, of which, Fatty acid amides (28.687 & 25.687%) was presented as a major compound in methanolic and ethanolic leaves extracts, respectively. While, 16 & 11 chemical compounds classes were detected in A. herba-alba flowers extracts, of which Fatty acid amides (25.623 & 23.295%) was presented as a major compound in methanolic and ethanolic flowers extracts, respectively. These bioactive materials make this species as a good candidates for different pharmaceutical and medicine academic researches and applications.

Summary: The objective of this study was to employ multi‐elemental analysis and chemometric multivariate data analysis for identifying the geographical origin of Camellia sinensis cultivated in Vietnam's northeastern region. Ninety‐two tea leaf samples encompassing four distinct varieties were sourced from Bac Can and Thai Nguyen provinces. These samples underwent analysis through Fourier transform infrared (FTIR) spectroscopy and chemometrics, while elemental quantification was achieved via inductively coupled plasma mass spectrometry (ICP‐MS), utilising mixed standards for 26 elements. The FTIR spectra exhibited characteristic peaks, denoting the functional groups of the potential compounds present. ICP/MS analysis identified the presence of 14 elements in the tea samples, revealing significant variations in content across the four varieties. principal component analysis (PCA) of the FTIR data illustrated that the initial two principal components accounted for 91.26% of the total variance, effectively segregating the four green tea varieties into distinct clusters. Conversely, PCA of the ICP‐MS spectra also distinguished the four varieties, albeit Trung Du and Hybrid F1 exhibited a proximate distribution. This closeness may be incidental and not indicative of correlation, considering the limited variable set. Our findings ascertain that ICP/MS and FTIR, augmented by chemometric software, serve as efficacious tools for ascertaining the geographical origins of tea. [ABSTRACT FROM AUTHOR]

In this experimental study, zinc aluminate and calcium aluminate spinel nano-powders were synthesized using the solution combustion method. Subsequently, we explored the impact of metal cation substitution (Zn+2 and Ca+2) on the optical and structural properties of these samples through ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction analysis (XRD). Crystalline forms of ZnAl2O4 and CoAl2O4 were obtained after calcination at 900 °C for 4 h under atmospheric air conditions. The UV–visible spectroscopy results revealed optical bandgap values of 3.771 and 3.507 eV for ZnAl2O4 and CaAl2O4 respectively. The FT-IR spectra demonstrated the presence of intense fundamental absorption peaks in the wavenumbers range 400–745 cm−1, confirming the formation of metal aluminate spinel structure. The X-ray diffraction analysis confirmed the spinel structure of the prepared samples. Furthermore, the XRD results revealed that the variation of the M element in the structure led to change in the lattice type and the crystallite size, which is ranged from 26.003 to 42.001 nm. These findings indicate that these compounds are promising candidates for a range of optoelectronic applications. [ABSTRACT FROM AUTHOR]

The extraction process of hemp seeds glycoprotein (HGP) was optimized by using response surface methodology based on the single-factor experiments, and the structure characteristic and antioxidant activity of HGP were evaluated. The optimum conditions were extracting temperature of 58.54 °C, material–liquid ratio of 1:22.21 and ultrasonic power of 344.53 W. The molecular weight of HGP was identified by SDS-PAGE to be about 35 kDa. The FT-IR results demonstrated the presence of uronic acid and pyranose in the HGP structure. UV spectral scanning results confirmed the presence of a polypeptide skeleton structure and aromatic amino acids in HGP. TGA analysis revealed two weight loss intervals for HGP, with a thermal degradation temperature of 341.6 °C. Moreover, HGP demonstrated good antioxidant activity in vitro, with IC50 values of all antioxidant indexes below 0.5 mg/mL. These findings provide a basis for in-depth exploration of functional characteristics of hemp seeds glycoprotein. [ABSTRACT FROM AUTHOR]

Plastic pollution has become a growing concern for environmental and human health in recent years. Currently, research suggests that soil compartments might be highly contaminated, with compost being one of the major sources for plastic contamination, especially at reduced sizes. In Geneva, microplastic contamination has already been evaluated in industrial compost but not yet in field-side compost. Therefore, this work focuses on the evaluation of concentrations and the characterization of microplastic particles (MPs) in field-side compost in Geneva. Four different field-side composts were sampled in Geneva and sieved with sizes ranging from >5 mm to 0.5 mm. The MPs were visually sorted when possible, and the smaller ones were treated by digestion and density separation processes. All of the MPs were analyzed with infrared spectroscopy. The results (sizes > 5 mm to 1.25 mm) reveal concentrations between 195 ± 64 and 1315 ± 375 plastic particles/kg of compost and the presence of conventional plastics in every compost. MPs were present in almost every size fraction for the four composts, and the origin of waste seemed to influence their concentrations. Indeed, composts free from organic household waste had lower concentrations than the ones accepting that kind of waste. Littering and waste still wrapped in plastic were also noticed for the composts with higher concentrations of MPs. The characterization results highlight the variety of plastic types among the composts, mostly represented by PE (polyethylene), PVA (polyvinyl alcohol), PP (polypropylene), and DAIP (polydiallyl iso-phthalate) in general but also specific contamination by PEMA (poly ethyl methacrylate) for only one of the composts. Further work is needed to evaluate the distribution of MPs according to their size or the types of waste used in composting, especially the potential degrading conditions of plastics, to mitigate their presence in composts.

Abstract The current study focuses on examining the characteristics of biofuel obtained from the pyrolysis of Madhuca longifolia residues, since the selected forest residue was primarily motivated by its greater volatile matter content. The study used several analytical techniques to describe pyrolysis oil, char, and gas obtained from slow pyrolysis process conducted between 350 and 600 °C in a fixed-bed reactor. Initially, the effect of process temperature on product distribution was assessed to motivate maximum pyrolysis oil yield and found to be 44.2 wt% at pyrolysis temperature of 475 °C, while the yields of char and gas were 22.1 wt% and 33.7 wt%, respectively. In order to determine the suitability of the feedstock, the Madhuca longifolia residues were analyzed by TGA and FT-IR, which revealed that the feedstock could be a feasible option as an energy source. The characterization of pyrolysis oil, char, and gas has been done through various analytical methods like FT-IR, GC-MS, and gas chromatography. The physicochemical characteristics of the pyrolysis oil sample were examined, and the results showed that the oil is a viscous liquid with a lower heating value than conventional diesel. The FT-IR and GC-MS analysis of pyrolysis oil revealed the presence of increased levels of oxygenated chemicals, acids, and phenol derivatives. The findings of the FT-IR analysis of char indicated the existence of aromatic and aliphatic hydrocarbons. The increased carbon content in the char indicated the possibility of using solid fuel. Gas chromatography was used to examine the chemical structure of the pyrolysis gas, and the results showed the existence of combustible elements.

Focusing on the problem of identifying and classifying aero-engine models, this paper measures the infrared spectrum data of aero-engine hot jets using a telemetry Fourier transform infrared spectrometer. Simultaneously, infrared spectral data sets with the six different types of aero-engines were created. For the purpose of classifying and identifying infrared spectral data, a CNN architecture based on the continuous wavelet transform peak-seeking attention mechanism (CWT-AM-CNN) is suggested. This method calculates the peak value of middle wave band by continuous wavelet transform, and the peak data are extracted by the statistics of the wave number locations with high frequency. The attention mechanism was used for the peak data, and the attention mechanism was weighted to the feature map of the feature extraction block. The training set, validation set and prediction set were divided in the ratio of 8:1:1 for the infrared spectral data sets. For three different data sets, the CWT-AM-CNN proposed in this paper was compared with the classical classifier algorithm based on CO2 feature vector and the popular AE, RNN and LSTM spectral processing networks. The prediction accuracy of the proposed algorithm in the three data sets was as high as 97%, and the lightweight network structure design not only guarantees high precision, but also has a fast running speed, which can realize the rapid and high-precision classification of the infrared spectral data of the aero-engine hot jets. [ABSTRACT FROM AUTHOR]

An Fe(III)-carbonato six-coordinate picket fence porphyrin complex with the formula [K(2,2,2-crypt)][FeIII(TpivPP)(CO3)]·C6H5Cl·3H2O (I) has been synthesized and characterized by UV-Vis and FT-IR spectra. The structure of (carbonato)(α,α,α,α-tetrakis(o-pivalamidophenyl)porphinato)ferrate(III) was also established by XRD. The iron atom is hexa-coordinated by the four nitrogen atoms of the pyrrol rings and the two oxygen atoms of the CO32− group. Complex I, characterized as a ferric high-spin complex (S = 5/2), presented higher Fe-Np (2.105(6) Å) and Fe-PC (0.654(2) Å) distances. Both X-ray molecular structure and Hirshfeld surface analysis results show that the crystal packing of I is made by C-H⋯O and C-H⋯Cg weak intermolecular hydrogen interactions involving neighboring [FeIII(TpivPP)(CO3)]− ion complexes. Computational studies were carried out at DFT/B3LYP-D3/LanL2DZ to investigate the HOMO and LUMO molecular frontier orbitals and the reactivity within the studied compound. The stability of compound I was investigated by analyzing both intra- and inter-molecular interactions using the 2D and 3DHirshfeld surface (HS) analyses. Additionally, the frontier molecular orbital (FMO) calculations and the molecular electronic potential (MEP) analyses were conducted to determine the electron localizations, electrophilic, and nucleophilic regions, as well as charge transfer (ECT) within the studied system. [ABSTRACT FROM AUTHOR]

Polypyrrole (PPy)/Yttrium Iron oxide (YIG) nanocomposite was synthesized by the chemical oxidation polymerization method. Yttrium iron oxide is also known as iron yttrium oxide or yttrium iron garnet denoted as YIG (Y3Fe5O12). YIG is a familiar material among the rare earth garnets and is also commonly used in electronic devices. Fourier transform infrared (FT-IR) spectroscopy analysis reveals the strong interaction between PPy and YIG nanoparticles. The crystal structure for the PPy and PPy nanocomposites is observed by X-ray Diffraction (XRD) and the average crystalline size calculated by Scherrer's formula for PPy/n-YIG is 27.47 nm. Surface morphology of the samples identified by scanning electron microscopy. Optical properties were studied by UV–Vis spectroscopy. From the 2-probe method, AC electrical conductivity for n-YIGPPy is found to be 1.05 × 10−5 S/cm, higher than that of the polypyrrole. The electrochemical performance of PPy and YIG/PPy nanocomposites was observed by cyclic voltammetry (CV). The combination of optical, electrical properties of YIG/PPy nanocomposites suits supercapacitor applications. [ABSTRACT FROM AUTHOR]

The study in Rey County, Tehran, Iran, examined microplastics (MPs) and heavy metals (Pb, Cd, Cu) in agricultural soils. Results show microplastic quantities (29–270 items kg−1), predominantly small particles (100–500 µm), black (42.70%) and white (40.5%) in color, with Polystyrene (PS) and Polypropylene (PP) as dominant polymers from plastic mulches. Soil concentrations of Pb, Cu, and Cd averaged 30.41 mg kg−1, 23.02 mg kg−1, and 4.97 mg kg−1, respectively. Microplastic-AES analysis detected Cu (5.86 mg kg−1), Cd (3.45 mg kg−1). Agricultural activities, especially plastic mulches, contribute significantly to soil contamination, emphasizing the need for sustainable practices in the region. [ABSTRACT FROM AUTHOR]

The polysaccharide (HUP-1) was fractionated and purified from crude polysaccharide of Hypsizygus ulmarius by using ion-exchange and gel-permeation chromatography. The chemical composition analysis of the HUP-1 noted 60.07% of carbohydrate, 2.22% of protein, 11.08% of uronic acid, and 4.39% of sulfate content respectively. The molecular weight of HUP-1 was 27,887 Da, and its monosaccharide composition disclosed 44.4% of mannose, 36.4% of glucose, and 19.18% of fucose. Further, the HUP-1 was examined for the structural characterization through the FTIR, 1H-NMR, 13C NMR, XRD, and SEM analysis. The HUP-1 showed the DPPH and ABTS scavenging activity were 16.38–61.60% and 21.33–85.08% at 1–5mg/ml concentration, with the EC50 values which were 4.160 and 2.245mg/ml and the significant value which was p < 0.05. The anticancer activity of HUP-1 reported 70% at 100μg/ml concentration against human lung carcinoma A549 cells. Hence, the above results of the HUP-1 showed good antioxidant and anticancer activity; it was well correlated for their molecular weight and monosaccharide composition such as mannose, glucose, and fucose. So, the good antioxidant and anticancer activity of the HUP-1 suggested that may be an effective chemotherapeutic treatment for lung cancer in the future pharmacological industry. [ABSTRACT FROM AUTHOR]

The chitosan (CH) from chitin of Sepia brevimana's cuttlebone was refined and converted into sulfated chitosan (SCH). The SCH was further translated into a low molecular weight sulfated chitosan (LMW-SCH), and its structure was analyzed with FT-IR and NMR spectroscopic techniques. Molecular docking of LMW-SCH was carried out to find out the white spot syndrome virus (WSSV) envelope proteins (5HLJ, 2EDM, and 2ED6) for identifying the bonding of LMW-SCH. The LMW-SCH has a high binding affinity with 5HLJ. As a result, the in silico analyses of LMW-SCH evaluated in this study are potential inhibitors of the three WSSV membrane protein targets and can function as a component of WSSV inhibition. [ABSTRACT FROM AUTHOR]

In the current study, the effect of rGO ratio on the N-dopped TiO2 has been synthesized through sol–gel method. The prepared N-doped TiO2/rGO composites were examined for humidity sensing applications. The relationship between optical properties and the humidity sensing properties was studied. The structure, morphology, and bonding interaction have been examined using XRD, FT-IR, PL and HRTEM respectively. The average particle size as estimated from XRD and HRTEM was found to be about 9 nm. The optical properties have been studied using UV/ Vis. Spectroscopy. Further, optical parameters including refractive index and optical band gap energy have been estimated. The humidity sensing behavior of the resultant composites were evaluated in a wide range of humidity (7%–97% RH) at different testing frequencies. The optical band gap was found to be decreased as the amount of rGO increase. Among all prepared samples, both the optical parameters and humidity sensing experiments confirmed that the 0.5% rGO@N-dopped TiO2 sample is the best candidate for the humidity sensing applications. The best optimum testing frequency was demonstrated to be 50 Hz. The sensor demonstrates a fast response and recovery times of 13 s and 33 s with low hysteresis and large sensitivity. The humidity sensing mechanism was studied using complex impedance spectroscopy at different RH levels under testing frequency range from 50 Hz to 5 MHz and testing voltage of 1 VAC. The produced structure demonstrated a promising material for humidity measuring devices. [ABSTRACT FROM AUTHOR]

• Analysis of Iyengaria stellata for its nutritional composition. • Detection of chemical constituents through GC-MS, FT-IR, Total Flavonoid and Phenolic contents. • Evaluation of pharmacological potential for hypoglycemic activity. • Evaluation of potential for pharmacological antimicrobial. • Evaluation of pharmacological potential for antioxidant. Seaweeds have gained significant attention for their bioactive compounds and extensive use in pharmaceuticals, nutraceuticals and cosmeceuticals. Therefore, comprehensive analysis was conducted to investigate the nutritional composition, identify and quantify the Phyco-chemicals and to evaluate the pharmacological potential using hypoglycemic, antimicrobial and antioxidant activities of Iyengaria stellata extract. The results of nutritional analysis revealed 39.72±2.60 % total ash, 14.54±0.44 % crude fat, 9.61±0.60 % proteins, 5.29±0.52 % crude fibers, 10.49±1.00 % moisture content, and total energy was 108.26±2.01 Kcal 100 g −1 of dry powder. Approximately, 15 compounds were tentatively detected in ethyl acetate extract with major compounds being Pentadecanoic acid, 14-methyl-, easter (31.62 %), (Z) -9- stearic acid, methyl easter (13.36 %), Elaidic acid, methyl easter (11.46 %), Phytol (6.31 %), n -Hexadecanoic acid (7.47 %), Linolelaidic acid, methyl ester (5.64 %) and 1-octadecyne (5.34 %). Similarly, n -butanol extract contained 16 compounds with primary compounds being Hexadecanoic acid, methyl ester (25.96 %), Elaidic acid methyl ester (21.39 %), Linolelaidic acid methyl ester (11.53 %), Octadecanoic acid, methyl ester (5.89 %), and Hexanedioic acid, dioctyl ester (5.26 %). FT-IR analysis revealed the presence of similar groups of compounds i.e. alcohols, phenols, lipids, carboxylic acids, amines, aromatics, ketones and halogens. Total phenolic contents (TPC) in ethyl acetate and n -butanol extract were measured as 2.982±0.876 mg GAEg−1 and 1.538±0.711 mg GAE g −1, whereas Total Flavonoids contents (TFC) were 2.058 ± 0.121 mg QE g −1 and 1.614 ± 0.643 mg QE g −1, respectively. Ethyl acetate extract exhibited more antioxidant potential with an IC 50 (2.59±1.34) compared to n -butanol extract (2.75±1.60). Moreover, n -butanol extract exhibited strong antimicrobial activity. The most susceptible strains were E. coli, S. aureus and P. aeruginosa. In terms of in-vivo hypoglycemic activity, the n -butanol extract proved to be more effective which significantly reduced the blood glucose level up to 226.17±3.43, 201.33±4.63 and 265.17±3.92 at 300, 200 and 100 mg kg−1 doses respectively after 24 h. In conclusion, the seaweed I. stellata exhibited significant potential in terms of its antioxidant, antimicrobial, and hypoglycemic properties. [ABSTRACT FROM AUTHOR]

The effect of varying extrusion conditions on the functional properties of hulless barley–mung bean (70:30) extruded snacks was investigated using response surface methodology with feed moisture (FM), barrel temperature (BT), and screw speed (SS) as process variables. Results revealed significant impacts on functional characteristics with varying extrusion conditions. Bulk density (BD) of extruded snacks ranged from 0.24 to 0.42 g/cm3, showing that lower FM and higher BT results in lower BD while it increased with increasing FM, SS, and BT. The expansion ratio (ER) of extruded snacks ranged between 2.03 and 2.33, showing BT and SS had a desirable positive effect, whereas increasing FM led to decreased ER. Increasing BT and SS depicted a negative effect on water absorption index, whereas FM showed positive effect, which ranged between 4.21 and 4.82 g/g. A positive effect on water solubility index was depicted by BT and SS, which ranges between 9.01% and 13.45%, as higher SS and BT led to starch degradation and increased solubility suggesting better digestibility. The hardness of extruded snacks ranged from 32.56 to 66.88 Newton (N), showing increasing FM increased hardness, whereas higher SS and BT resulted in lowering the hardness. Scanning electronic microscope (SEM) analysis revealed structural changes in extrudates in comparison with nonextruded flour, indicating starch gelatinization and pore formation affected by varying processing parameters. Shifts in absorption bands were observed in Fourier transform infrared spectroscopy (FT‐IR), suggesting structural changes in starch and protein. Understanding the effects of extrusion parameters on product properties can help tailored production to meet consumers' preferences and the development of functional snacks with improved nutritional quality. [ABSTRACT FROM AUTHOR]

Bio-fabrication of silver nanoparticles (AgNPs) was performed using the extracts of the brown seaweed Dictyota ciliolata (DC) and the resultant AgNPs were characterized by biophysical and chemical techniques. A prominent absorbance peak observed at 417 nm in the UV-Vis spectroscopy confirmed the presence of AgNPs. The FTIR spectrum revealed the presence of various functional groups at 2988.16, 1763.58, 1375.96, 1242.9 and 1055.84 cm-1 which indicates their involvement in the stabilization of nanoparticles. XRD analysis showed the crystalline nature of DC-AgNPs. SEM analysis confirmed the presence of particles with an agglomerated clusters of micro flakes-like structure with the size range of 10 –120 nm. The weight percentage of elemental silver was determined as 54.96 % using the EDX analysis. DC-AgNPs showed potent larvicidal toxicity on the larvae of Anopheles stephensi, Aedes aegypti and Culex quinquefasciatus at first, second and third instars as well as against pupae stages when compared to the aqueous extract of D. ciliolata (DC-AE). The eco-toxicity assessment of the DC-AgNPs showed only very low toxicity against the non-target species, Artemia salina. The study results show the efficacy of the brown seaweed, D. ciliolata for the cost-effective and eco-friendly synthesis of AgNPs and their potential against mosquito-vectors. [ABSTRACT FROM AUTHOR]