Category: 6. Chemistry
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Clay-supported bio-based Lewis acid ionic liquid as a potent catalyst for the dehydration of fructose to 5-hydroxymthylfurfural
Hal-IL structure In Fig. 1A the XRD patterns of Hal and Hal-IL are shown and compared. As depicted, the Hal provided from China exhibited the peaks at 2θ = 12.3°, 18.8°, 20.6°, 25.2°, 35.7°, 38.1°, 56.3° and 62.5°. Although in the XRD pattern of Hal-IL, the characteristic peaks of Hal are observed, this pattern is distinguished from pristine…
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Modeling sunset yellow removal from fruit juice samples by a novel chitosan-nickel ferrite nano sorbent
FTIR analysis The FTIR spectra of Cs, NiFe2O4 NPs, and Cs@NiFe2O4 NPs are presented in Fig. 2. The FTIR spectrum of Cs indicates a broad band at 3600–3267 cm-1 attributed to O–H (hydroxyl group) and NH2 (amine group) starching vibrations48,49, sharp peaks owing to symmetric and asymmetric C–H stretching vibrations at 2901 cm−1 and 2806 cm−1, respectively, and peaks…
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Suberin, the hallmark constituent of bark, identified in a 45-million-year-old monkeyhair tree (Coumoxylon hartigii) from Geiseltal, Germany
Tissue and extracts Three tissue samples from the two layers of the fossil monkeyhair tree (Fig. 1) as well as a recent control sample from the bark of Quercus suber were analyzed. The outer layer of the fossil (sample I) was interpreted as bark, the inner layer as degraded wood (sample II), and sample III as…
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Tailoring visible-light active TiO2/cellulose nanocomposites with controlled crystalline structure for enhanced photocatalytic performance
Effect of H2SO4 concentration on crystalline structure of TiO2 on cellulose TiO2 on cellulose support was fabricated through an in situ hydrolysis process. Titanium oxysulfate is a precursor that can be dissolved in water and acidic conditions. Thus, the effect of H2SO4 concentration, ranging from 0 to 10% wt on the TiO2 phase, was investigated by…
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Variability in proximate composition, phytochemical traits and antioxidant properties of Iranian agro-ecotypic populations of fenugreek (Trigonella foenum-graecum L.)
Morphological features The present data indicated a wide variability among the studies AEPs (Table 1). Comparison of quantitative and qualitative parameters for each ecotype showed significant (p < 0.05) differences correlated principally to origin and ecological conditions. Number of twin pods had the highest coefficient of variation (CV = 14.32%). Petropoulos7 noted that twin pods in fenugreek indicative of…
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Comparison between ammonium formate and ammonium fluoride in the analysis of stratum corneum lipids by reversed phase chromatography coupled with high resolution mass spectrometry
Effects of ammonium formate on the separation and detection of ceramides Using a gradient elution with ammonium formate as mobile phase modifier at the 5 mM concentration, the formation of the stable anionic adduct [M + HCOO]− was promoted, while the production of the deprotonated molecular ion [M − H]− was less favored. In some cases, the prominent peak due…
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Prediction model of spontaneous combustion risk of extraction borehole based on PSO-BPNN and its application
PSO-BPNN model prediction results The Matlab is used to establish a PSO-BPNN model with allowable error of 0.00001, the maximum number of particle iterations of 50, all learning factors of 2, inertial factor of 0.6 and maximum flying velocity of particles of 0.8. The results of training and prediction are shown in Figs. 5, 6 and Table 3.…
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Efficient extraction of oleoresin from Ferula gummosa roots by natural deep eutectic solvent and its structure and chemical characterizations
Sadraei, H., Asghari, G. R., Hajhashemi, V., Kolagar, A. & Ebrahimi, M. Spasmolytic activity of essential oil and various extracts of Ferula gummosa Boiss. on ileum contractions. Phytomedicine 8, 370–376 (2001). Article CAS PubMed Google Scholar Abedi, D., Jalali, M. & Sadeghi, N. Composition and antimicrobial activity of oleogumresin of Ferula gumosa Bioss. essential oil…
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Hexose phosphorylation for a non-enzymatic glycolysis and pentose phosphate pathway on early Earth
Fothergill-Gilmore, L. A. & Michels, P. A. M. Evolution of glycolysis. Prog. Biophys. Mol. Biol. 59, 105–235 (1993). Article CAS PubMed Google Scholar Potter, S. & Fothergill-Gilmore, L. A. Molecular evolution: The origin of glycolysis. Biochem. Educ. 21, 45–48 (1993). Article CAS Google Scholar Stincone, A. et al. The return of metabolism: Biochemistry and physiology…
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Orange peel magnetic activated carbon for removal of acid orange 7 dye from water
BET surface area The carbonization temperature impact on preparation of OPAC was investigated at pyrolysis temperatures ranged between 700 and 900 °C. As depicted in Table 1, the specific surface area and pore volume exhibit a noteworthy trend in response to varying carbonization temperatures. At a pyrolysis temperature of 700 °C (Fig. 1a), the OPAC sample displayed the…