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71.
Hanna Leontowicz Maria Leontowicz Jacek Namiesnik Jerzy Drzewiecki Yong-Seo Park Zofia Zachwieja Pawel Zagrodzki Arkadi Gorinstein Simon Trakhtenberg Shela Gorinstein 《European Food Research and Technology》2008,227(4):1251-1258
The aim of this study was to determine the quality indices and assess the influence of diets supplemented with mussels from
contaminated (MCont) and non-contaminated areas (MNCont) on some indices of protein and lipid metabolism in rats fed with
cholesterol. A wide range of in vitro tests demonstrated that mussels from contaminated area have a higher content of proteins,
lipids and higher antioxidant capability. In the in vivo experiment, 28 male Wistar rats were divided into 4 diet groups each
of 7 and named Control, Cholesterol (Chol), Chol/MCont and Chol/MNCont. During 30 days of the experiment rats of all four
groups were fed basal diet (BD), supplemented with 1% of Chol, 1% of Chol and 5.6% of mussel’s dry matter (DM) from contaminated
and 1% Chol and 5.6% of mussel DM from non-contaminated areas for Chol/MCont and Chol/MNCont groups, respectively. At the
end of the experiment, a high digestibility coefficient of DM and crude protein in the Chol/MCont and Chol/MNCont groups of
rats was found: 93.56 and 93.87% and 91.64 and 91.36%, respectively, and the differences were not significant (P > 0.05). However, the protein efficiency ratio was significantly higher in the Chol/MCont and Chol/MNCont than in the Control
and Chol diet groups. Also the level of nitrogen retention as shown by feces and urine examination was higher in the Chol/MCont
and Chol/MNCont groups. Diet, supplemented with mussel dry matter from both contaminated and non-contaminated areas significantly
hindered the rise in plasma lipids and also hindered the decrease in plasma antioxidant activity. Minor changes were fixed
in the protein profile of rat’s plasma after both mussels’ diet. In conclusion, supplementation of diets, containing cholesterol
with mussels’ DM from both contaminated and non-contaminated areas improves animals’ protein metabolism and positively affects
plasma lipid profile and plasma antioxidant activity. Antioxidant tests can be used as an additional index for the quality
of mussels. 相似文献
72.
The aim of the investigation was to evaluate the level of amino acids and the quality of protein in fresh and cooked leaves of kale and in two types of frozen product prepared for consumption after 12-months storage at −20 °C. Kale blanched before freezing (the traditional method) was cooked after refrigerated storage, while that cooked before freezing (the modified method) was defrosted and heated in a microwave oven. Both fresh and processed leaves of kale were a good source of amino acids. In all the samples, glutamic acid, proline and aspartic acid were the dominant, while lysine and leucine were the limiting amino acids. Cooked leaves contained 78% of the total amino acid content found in fresh leaves, while the traditional and modified frozen products contained 76% and 78%, respectively. The proportion of essential amino acids in total amino acids was 44% and 43%, respectively for fresh and cooked leaves and 46% for the frozen products. The lowest EAA index was found for the traditional frozen product (99); it was higher for the remaining samples, which were broadly similar to each other (105–106). 相似文献
73.
Lipids - Phytanic, pristanic, and 4,8,12-trimethyltridecanoic acids were found to comprise from 2.7% (winter) to 13.3% (spring) of the fatty acids of the neutral lipids of earthworms collected in... 相似文献
74.
Wronska-Cwikowska Zofia Tatar Janusz 《Bulletin of Engineering Geology and the Environment》1984,30(1):301-304
Natural aggregates are characterized by considerable variability in their technical properties/sand, silt and clay fractions. The statistical estimation of the homogeneity of domestic natural aggregates was carried out at the Institute of Technology and Organization of Building Production in Warsaw Technical University. Total number of results amounted two thousand. A calculation has been made by EMC “Odra 204” for a program in algoritmic language Algol. Equations derived permit the forecast with 95% probability of the compressive strength of Portland—cement concrete on the basis of the variability of features of the aggregates. 相似文献
75.
The surface tension of atactic polystyrene (PS), isotactic poly(propylene) (PP) and PS/PP‐blends, and additionally the interfacial tension between PP/PS have been measured in the temperature range between 200 and 280°C using the pendant drop method. Within the temperature range studied, the surface tension decreased linearly with increasing temperature for all systems whereas the surface tension of neat PP is approximately 7 mN/m smaller than the value of PS. The interfacial tension between PS and PP is in the range of approximately 4 mN/m and this indicates a strong incompatibility. It results a heterogeneous PP/PS blend morphology. A significant increase of the surface tension of the blends as a function of composition is observed only when the PS content exceeds 60 wt.‐%. Furthermore, microscopic observations indicate that even if the bulk matrix material is PS, a thin layer of PP can be detected by atomic force microscopy on the droplet surface used for surface tension measurements. 相似文献
76.
Anna Stasiowicz-Krzemie Micha Gobiewski Anita Paziska Wojciech Paziski Andrzej Miklaszewski Marcin arowski Zofia Adamska-Jerna Judyta Cielecka-Piontek 《International journal of molecular sciences》2022,23(2)
Background: Naringenin (NAR) is a flavonoid with excellent antioxidant and neuroprotective potential that is limited by its low solubility. Thus, solid dispersions with β-cyclodextrin (β-CD), hydroxypropyl-β-cyclodextrin (HP-β-CD), hydroxypropylmethylcellulose (HPMC), and microenvironmental pH modifiers were prepared. Methods: The systems formation analysis was performed by X-Ray Powder Diffraction (XRPD) and Fourier-transform infrared spectroscopy (FT-IR). Water solubility and dissolution rates were studied with a pH of 1.2 and 6.8. In vitro permeability through the gastrointestinal tract (GIT) and the blood-brain barrier (BBB) was assessed with the parallel artificial membrane permeability assay (PAMPA) assay. The antioxidant activity was studied with the 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and cupric ion reducing antioxidant capacity (CUPRAC) assays, while in vitro enzymes studies involved the inhibition of acetylcholinesterase, butyrylcholinesterase, and tyrosinase. For the most promising system, in silico studies were conducted. Results: NAR solubility was increased 458-fold by the solid dispersion NAR:HP-β-CD:NaHCO3 in a mass ratio of 1:3:1. The dissolution rate was elevated from 8.216% to 88.712% in a pH of 1.2 and from 11.644% to 88.843% in a pH of 6.8 (within 3 h). NAR GIT permeability, described as the apparent permeability coefficient, was increased from 2.789 × 10−6 cm s−1 to 2.909 × 10−5 cm s−1 in an acidic pH and from 1.197 × 10−6 cm s−1 to 2.145 × 10−5 cm s−1 in a basic pH. NAR BBB permeability was established as 4.275 × 10−6 cm s−1. The antioxidant activity and enzyme inhibition were also increased. Computational studies confirmed NAR:HP-β-CD inclusion complex formation. Conclusions: A significant improvement in NAR solubility was associated with an increase in its biological activity. 相似文献
77.
78.
Katarzyna Bednarska Agnieszka B. Olejniczak Błażej A. Wojtczak Zofia Sułowska Prof. Zbigniew J. Leśnikowski Prof. 《ChemMedChem》2010,5(5):749-756
Novel types of adenosine and 2′‐deoxyadenosine derivatives containing boron clusters at positions C2′, N6, or C8 were synthesized. The effect of these modified compounds on platelet function was studied. Modification of adenosine at the C2′ position with a para‐carborane cluster (C2B10H11) results in efficient inhibition of platelet function, including aggregation, protein secretion, and P‐selectin expression induced by thrombin or ADP. These preliminary findings and the new chemistry proposed form the basis for the development of a new class of adenosine analogues that modulate human blood platelet activities. 相似文献
79.
Monika Malicka Franco Magurno Zofia Piotrowska-Seget 《International journal of molecular sciences》2022,23(20)
Changes in soil microbial communities in response to hydrocarbon pollution are critical indicators of disturbed ecosystem conditions. A core component of these communities that is functionally adjusted to the life-history traits of the host and environmental factors consists of arbuscular mycorrhizal fungi (AMF). AMF communities associated with Poa trivialis and Phragmites australis growing at a phenol and polynuclear aromatic hydrocarbon (PAH)-contaminated site and at an uncontaminated site were compared based on LSU rDNA sequencing. Dissimilarities in species composition and community structures indicated soil pollution as the main factor negatively affecting the AMF diversity. The AMF communities at the contaminated site were dominated by fungal generalists (Rhizophagus, Funneliformis, Claroideoglomus, Paraglomus) with wide ecological tolerance. At the control site, the AMF communities were characterized by higher taxonomic and functional diversity than those exposed to the contamination. The host plant identity was the main driver distinguishing the two AMF metacommunities. The AMF communities at the uncontaminated site were represented by Polonospora, Paraglomus, Oehlia, Nanoglomus, Rhizoglomus, Dominikia, and Microdominikia. Polonosporaceae and Paraglomeraceae were particularly dominant in the Ph. australis mycorrhizosphere. The high abundance of early diverging AMF could be due to the use of primers able to detect lineages such as Paraglomeracae that have not been recognized by previously used 18S rDNA primers. 相似文献
80.
Elżbieta Rytel Agnieszka Nemś Anna Pęksa Agnieszka Kita Joanna Miedzianka Agnieszka Tajner-Czopek Alicja Zofia Kucharska Anna Sokół-Łętowska Karel Hamouz 《International Journal of Food Science & Technology》2019,54(1):92-101
Despite variations in the content of polyphenols, the tested potato varieties with red and purple flesh contained similar amounts of anthocyanins. Potatoes of the red-fleshed HBr variety were distinguished by a significant content of pelargonidin-3-feruloylrutinoside-5-glucoside, and those of the purple-fleshed Vitelotte variety were characterised by a significant cyanidin-3-rutinoside content. Immediately after cutting, raw potatoes with red flesh showed a small share of yellow (b* parameter) and double the share of red (a*) as compared to purple-fleshed tubers. A reduction in the share of red dye was observed in purple- and red-fleshed potatoes except Vitelotte and Rosalinde tubers, at both 1 and 4 h after being cut. The flesh colour of cooked potatoes was characterised by low susceptibility to darkening, and purple-fleshed tubers were more saturated by chroma than tubers of red-fleshed varieties. 相似文献