The study of wax gelators is a new direction with the potential for use in foods for special dietary uses. Waxes of both plant and animal origin, which consist of various combinations of organic compounds: hydrocarbons, wax esters, free fatty acids and free higher alcohols, are among the studied ones. One of the main characteristics of these gelling agents is their melting point, which largely depends on the component composition of the wax. However, at present there are no models capable to reliably predict this parameter depending on the gel-forming agent composition. of this work was to build models predicting the influence of wax composition on its melting temperature. . Preparative flash chromatography was used to obtain individual fractions of the beeswax (obtained from a Russian apiary). On the basis of these fractions, combinations were made and their melting temperatures were measured using the method of differential scanning calorimetry. Two approaches were used to predict the melting temperatures of wax gel-formers: multiple linear regression and the construction of artificial neural networks. . A total of 68 gelling agent combinations were analyzed. The model obtained on the basis of multiple linear regression was characterized by high values of the multiple correlation coefficient (r=0.77). Nevertheless, high values of the standard deviation in the most cases led to false prediction results. The application of artificial neural networks made it possible to get a more reliable prognosticating system with high values of the correlation coefficient (r=0.97) and the standard deviation not exceeding 3 °С. . As a result of the conducted work it has been shown that it is possible to predict melting temperatures on the basis of the component composition of gel-forming fractions. The use of the data obtained in the article will allow to develop oleogels with the specified composition and properties for their use in new types of foodstuffs.
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http://dx.doi.org/10.33029/0042-8833-2022-91-2-99-104 | DOI Listing |
Int J Biol Macromol
January 2025
Department of Chemistry, Suleyman Demirel University, Faculty of Arts and Science, 32260 Isparta, Turkey.
Poly(lactic) (PLA) is a biodegradable material obtained from renewable resources and is recognized as a safe biopolymer by the Food and Drug Administration. PLA expresses excellent mechanical and moldability attributes nonetheless poor elasticity/functionality limits its widespread utilization. One approach to compensate for this is chemical surface modification through free radical grafting with small organic molecules like maleic anhydride (MA).
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
January 2025
Institute of Chemistry, Military University of Technology, Kaliskiego 2, PL-00908 Warsaw, Poland.
Molecular arrangement in the chiral smectic phases of the glassforming (S)-4'-(1-methylheptylcarbonyl)biphenyl-4-yl 4-[7-(2,2,3,3,4,4,4-heptafluorobutoxy) heptyl-1-oxy]benzoate is investigated by X-ray diffraction. An increased correlation length of the positional short-range order in the supercooled state agrees with the previous assumption of the hexatic smectic phase. However, the registered X-ray diffraction patterns are not typical for the hexatic phases.
View Article and Find Full Text PDFPhys Chem Chem Phys
January 2025
Theoretical Physics Section, Bhabha Atomic Research Centre, Mumbai-400085, India.
Extensive research on ultrashort laser-induced melting of noble metals like Au, Ag and Cu is available. However, studies on laser energy deposition and thermal damage of their alloys, which are currently attracting interest for energy harvesting and storage devices, are limited. This study investigates the melting damage threshold (DT) of three intermetallic alloys of Au and Cu (AuCu, AuCu and AuCu) subjected to single-pulse femtosecond laser irradiation, comparing them with their constituent metals.
View Article and Find Full Text PDFThe EFSA Panel on Food Contact Materials (FCM) assessed the safety of the recycling process NGR LSP (EU register number RECYC328). The input is hot washed and dried poly(ethylene terephthalate) (PET) flakes mainly originating from collected post-consumer PET containers, with no more than 5% PET from non-food consumer applications. The flakes are dried (step 2), melted in an extruder (step 3) and decontaminated during a melt-state polycondensation step under high temperature and vacuum (step 4).
View Article and Find Full Text PDFMater Horiz
January 2025
Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu 610031, China.
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