Search results for "chemical parameters"
showing 10 items of 17 documents
Comparative Study of Several Machine Learning Algorithms for Classification of Unifloral Honeys
2021
Unifloral honeys are highly demanded by honey consumers, especially in Europe. To ensure that a honey belongs to a very appreciated botanical class, the classical methodology is palynological analysis to identify and count pollen grains. Highly trained personnel are needed to perform this task, which complicates the characterization of honey botanical origins. Organoleptic assessment of honey by expert personnel helps to confirm such classification. In this study, the ability of different machine learning (ML) algorithms to correctly classify seven types of Spanish honeys of single botanical origins (rosemary, citrus, lavender, sunflower, eucalyptus, heather and forest honeydew) was investi…
Distinct photodynamics of κ-N and κ-C pseudoisomeric iron(ii) complexes
2021
Two closely related FeII complexes with 2,6-bis(1-ethyl-1H-1,2,3-triazol-4yl)pyridine and 2,6-bis(1,2,3-triazol-5-ylidene)pyridine ligands are presented to gain new insights into the photophysics of bis(tridentate) iron(II) complexes. The [Fe(N^N^N)2]2+ pseudoisomer sensitizes singlet oxygen through a MC state with nanosecond lifetime after MLCT excitation, while the bis(tridentate) [Fe(C^N^C)2]2+ pseudoisomer possesses a similar 3MLCT lifetime as the tris(bidentate) [Fe(C^C)2(N^N)]2+ complexes with four mesoionic carbenes. Financial support from the Deutsche Forschungsge-meinschaft [DFG, Priority Program SPP 2102] "Light-controlled reactivity of metal complexes" (BA 4467/7-1, LO 714/11-1, …
Estudio experimental comparado de marcadores bioquímicos en la infección por Fasciola hepatica y F. gigantica
2017
Fascioliasis is caused by the genetically and phenotypically very close Fasciola hepatica and F. gigantica. The latter, always considered secondary in human infection, appears nowadays increasingly involved in human endemic areas of Africa and Asia. Unfortunately, little is known about the pathogenicity of this liver fluke species, mainly due to difficulties assessing the moment of a patient's infection in the anamnesis and in the differential diagnosis with F. hepatica. This is the first experimental study comparing F. hepatica and F. gigantica in a long-term study of up to 24 weeks with genotypically and phenotypically standardised fluke strains in the same animal model host, the Guirra s…
From the Beehives: Identification and Comparison of Physicochemical Properties of Algerian Honey
2021
In this study, the authors aimed at characterizing 11 Algerian kinds of honey taken from various geographical locations (beehives located at Djelfa (Medjbara and Dzaira), Laghouat, Aflou, Medea, Tiaret, Sidi bel-Abbes, Tiaret, Ain-Safra, Mostaganem, El Bayadh, and Ghardïa). The authors investigated the physicochemical parameters of these honey samples, including density, water content, electrical conductivity, ash content, pH, hydroxymethylfurfural (HMF) content, free acidity, and color. The physicochemical parameters obtained were found to be within acceptable ranges according to the international standards (Codex Alimentarius) for 9 out of 11 analyzed samples: density 1.38–1.50 g/cm3 (the…
Ocena mikrobiologiczna niepasteryzowanych soków owocowych i warzywnych
2017
Celem pracy była ocena parametrów fizykochemicznych oraz mikrobiologicznych niepasteryzowanych soków owocowych i warzywnych podczas próby przechowalniczej. Analizie poddano takie parametry fizykochemiczne, jak: pH, kwasowość ogólną, gęstość względną oraz zawartość ekstraktu. W badaniach mikrobiologicznych określono ilość mikroorganizmów oraz przeprowadzono ocenę jakościową badanych soków. Przetrzymywanie otwartych soków przez jedną godzinę w temperaturze pokojowej nie wpłynęło istotnie na zmianę parametrów fizykochemicznych. W trakcie badań odnotowano wzrost ogólnej liczby drobnoustrojów, stwierdzono obecność bakterii grupy coli oraz bakterii rodzaju Pseudomonas. Nie stwierdzono obecności S…
Fucus vesiculosus extracts as natural antioxidants for improvement of physicochemical properties and shelf life of pork patties formulated with oleog…
2018
There is limited information in the literature concerning the feasibility of using algal extracts as natural additives for improvement of the quality and shelf-life ofmeat products. Hence, a Fucus vesiculosus extract (FVE) at the concentrations of 250mg kg-1 (FVE-250), 500mg kg-1 (FVE-500) and 1000mg kg-1 (FVE-1000) were added to pork patties with linseed oil oleogel as a fat replacer. RESULTS: Total polyphenol content of FVE was determined to be 20 g phloroglucinol equivalents 100 g-1 extract. Antioxidant values ranged from 37.5 𝛍mol of Trolox equivalents (TE) g-1 (FRAP assay) to 2111 𝛍mol TE g-1 extract (ABTS assay). Regarding oxidation stability, FVE-1000 showed the lowest values of th…
Thermomineral waters of Greece: geochemical characterization
2020
DETERMINAZIONE DI PARAMETRI CHIMICI MEDIANTE TECNOLOGIA NIR (FOODSCAN™ DAIRY ANALYSER) IN CAMPIONI DI FORMAGGIO “CACIOCAVALLO PALERMITANO"
2012
The aim of the study was to evaluate the “Global Cheese” calibration for FoodScan ™ Dairy Analyser by Foss to determination chemical and nutritional characteristics of “Caciocavallo Palermitano” cheese: fat, protein, chloride, total solids and humidity. A total of 42 samples of “Caciocavallo Palermitano” were analyzed by two methods: FoodScan™ and the official chemical methods. The statistics used for the comparison of the methods showed a more than good capacity of analysis of the NIT method. Therefore FoodScan ™ is a valuable tool to support the activities of analysis of dairy products.