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Knowing the quality of mill streams is very important for obtaining standardized flours with intended qualities for specific applications. The physicochemical and rheological quality of wheat flour mill streams obtained through industrial milling were analyzed. Rheological behavior was tested using alveograph, rheofermentograph, and mixolab equipment. The results obtained indicate that the starch damage, protein quality, and rheological properties vary with the mill streams. Three variants of breadmaking flours, obtained by blending different milling fractions without negatively affecting the extraction and final product quality, were characterized. 相似文献
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Knowing the quality of mill streams is very important for getting flours with improved quality. In the present work, 49 mill streams, obtained by milling common wheat with an industrial roller mill, were characterized in terms of phenolic content, antioxidant activity and iron content. The antioxidant activity was estimated using different methods: DPPH-radical scavenging, Trolox equivalent antioxidant capacity, and iron reducing antioxidant power. The break tailings and first tailings of the reduction passages had the largest contents of iron. The total phenolic contents (TPC) from flour streams ranged between 76.3 and 369 mg ferulic acid equivalent/100 g d.w. The highest TPC were obtained for the second fractions resulting from 1st and 2nd break rolls. The highest antioxidant activity was registered for flour streams collected from: the last two break rolls, the reduction rolls that process the tailings of the first three reduction passages and bran finisher. Trolox equivalent antioxidant capacity had the same trend as DPPH-radical scavenging activity. The highest iron reducing antioxidant power was found in the tailings of the reduction rolls. The knowledge provided by this study could be successfully applied for getting flour with improved antioxidant activity and iron content by mixing different types of mill streams. 相似文献
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Gianina Popescu-Pelin Carmen Ristoscu Liviu Duta Iuliana Pasuk George E. Stan Miruna Silvia Stan Marcela Popa Mariana C. Chifiriuc Claudiu Hapenciuc Faik N. Oktar Anca Nicarel Ion N. Mihailescu 《Marine drugs》2020,18(12)
We report on new biomaterials with promising bone and cartilage regeneration potential, from sustainable, cheap resources of fish origin. Thin films were fabricated from fish bone-derived bi-phasic calcium phosphate targets via pulsed laser deposition with a KrF * excimer laser source (λ = 248 nm, τFWHM ≤ 25 ns). Targets and deposited nanostructures were characterized by SEM and XRD, as well as by Energy Dispersive X-ray (EDX) and FTIR spectroscopy. Films were next assessed in vitro by dedicated cytocompatibility and antimicrobial assays. Films were Ca-deficient and contained a significant fraction of β-tricalcium phosphate apart from hydroxyapatite, which could contribute to an increased solubility and an improved biocompatibility for bone regeneration applications. The deposited structures were biocompatible as confirmed by the lack of cytotoxicity on human gingival fibroblast cells, making them promising for fast osseointegration implants. Pulsed laser deposition (PLD) coatings inhibited the microbial adhesion and/or the subsequent biofilm development. A persistent protection against bacterial colonization (Escherichia coli) was demonstrated for at least 72 h, probably due to the release of the native trace elements (i.e., Na, Mg, Si, and/or S) from fish bones. Progress is therefore expected in the realm of multifunctional thin film biomaterials, combining antimicrobial, anti-inflammatory, and regenerative properties for advanced implant coatings and nosocomial infections prevention applications. 相似文献
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Popa I Pin D Remoué N Remoué N Osta B Callejon S Videmont E Gatto H Portoukalian J Haftek M 《Veterinary research communications》2011,35(8):501-509
Alterations of the lipid expression in the skin of human and canine atopic subjects may be one of the key factors in the disease
development. We have analyzed the ultrastructure of the clinically uninvolved skin of atopic dogs and compared it with the
lipid composition of their tape-stripped stratum corneum (SC). The effect of a 2 month treatment of atopic dogs by food supplementation
with a mixture of essential fatty acids was evaluated on skin samples taken before and after the treatment period. Electron
microscopy revealed that the non-lesional skin of atopic dogs exhibited an abnormal and largely incomplete structure of the
lamellar lipids with little cohesion between the corneocyte strata. The SC of atopic dogs was characterized by a significant
decrease in the lipid content when compared to the healthy controls. Following oral supplementation with the mixture of essential
fatty acids, the overall lipid content of the SC markedly increased. This feature was observed both with the free and, most
importantly, with the protein-bound lipids (cholesterol, fatty acids and ceramides), the latter constituting the corneocyte-bound
scaffold for ordinate organisation of the extracellular lipid bi-layers. Indeed, the semi-quantitative electron microscopy
study revealed that the treatment resulted in a significantly improved organization of the lamellar lipids in the lower SC,
comparable to that of the healthy dogs. Our results indicate the potential interest of long-term alimentary supplementation
with omega-6 and omega-3 essential fatty acids in canine atopic dermatitis. 相似文献
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Radu IP Miller JB Marcus CM Kastner MA Pfeiffer LN West KW 《Science (New York, N.Y.)》2008,320(5878):899-902
Quasi-particles with fractional charge and statistics, as well as modified Coulomb interactions, exist in a two-dimensional electron system in the fractional quantum Hall (FQH) regime. Theoretical models of the FQH state at filling fraction v = 5/2 make the further prediction that the wave function can encode the interchange of two quasi-particles, making this state relevant for topological quantum computing. We show that bias-dependent tunneling across a narrow constriction at v = 5/2 exhibits temperature scaling and, from fits to the theoretical scaling form, extract values for the effective charge and the interaction parameter of the quasi-particles. Ranges of values obtained are consistent with those predicted by certain models of the 5/2 state. 相似文献
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