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Structural and Physiological Properties of Footwear Textiles

Kaziur Patrycja, Mikołajczyk Zbigniew

Fibres & Textiles in Eastern Europe

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2023

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Vol. 31, no. 5

75--85

EN

Textile uppers in the form of fitted knitted fabrics are now gaining in importance in the production of commercial footwear. The subject of this study was twelve different textile uppers and two reference leather materials. Structural properties and parameters of physiological comfort were characterized for selected variants. In order to analyze the thermo-physiological properties of the upper parts of the footwear, air permeability, thermal insulation properties, water vapor permeability and sorption properties were measured. Among the variants of textile uppers analyzed, the most desirable functional properties were shown by knitted fabrics made on cylindrical crochet machines of large diameters. The varnished cowhide leather variant was characterized by the worst hygienic properties.

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Wpływ surowca na właściwości preparatów wysokobłonnikowych

Anioła Jacek

Przemysł Spożywczy

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2019

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T. 73, nr 4

10--13

PL

Zwiększenie spożycia błonnika pokarmowego jest jedną z dróg uchronienia się przed chorobami dietozależnymi, stanowiącymi poważny problem zdrowotny. Stąd rosnące zainteresowanie skoncentrowanymi źródłami błonnika, szczególnie takimi o działaniu ukierunkowanym na zapobieganiu konkretnym schorzeniom. Błonnik pozyskany z różnych źródeł surowcowych różni się składem frakcyjnym, a co za tym idzie właściwościami i odziaływaniem fizjologicznym. Działanie preparatów wysokobłonnikowych pozyskanych z odpadowych źródeł zbożowych, o dużej zawartości frakcji nierozpuszczalnych (IDF) ukierunkowane jest bardziej na wypełnienie jelit i pobudzenie perystaltyki, dlatego mogą być stosowane jako suplementy diety wspomagające odchudzanie i przeciwdziałające zaparciom. Z kolei preparaty owocowe, zawierające więcej frakcji rozpuszczalnych (SDF), szczególnie pektyn, są skuteczne w leczeniu i profilaktyce miażdżycy i cukrzycy. Interesujące są jednak przykłady fizjologicznego odziaływania preparatów pozyskanych z mniej konwencjonalnych źródeł.

EN

Increased intake of dietary fiber is one of the ways to protect against diet-related diseases , which constitute a serious health problem. Thus, the growing interest in concentrated sources of fiber, especially those aimed at preventing specific diseases. The fiber obtained from various raw material sources differs in the fractional composition, and hence the properties and physiological impact. High-fiber preparations obtained from waste cereal sources with a high content of insoluble fraction (IDF) are directed more at filling the intestines and stimulating peristalsis, so they can be used as dietary supplements to support weight loss and counteract constipation. In turn, fruit preparations containing more soluble fraction (SDF), especially pectins, are effective in the treatment and prophylaxis of atherosclerosis and diabetes. Interesting, however, are examples of physiological effects of preparations obtained from less conventional sources.

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Analysis of Printed Fabrics for Military Camouflage Clothing

Kovacevic S., Gudlin Schwarz I., Durasevic V.

Fibres & Textiles in Eastern Europe

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2012

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Vol. 20, no. 3 (92)

82--86

EN

Several basic properties of fabrics for camouflage clothing and protection for military purposes are described. The physical and mechanical properties of the yarns and fabrics and their physiological properties with different structural parameters of fabrics were tested. The structural fabric parameters and after-treatment conditions affect the physical-mechanical and physiological properties of the fabrics. The correlation values of individual parameters are relatively high. The influence of abrasion on colour shades applied to camouflage fabrics is different, indicating a different resistance to the colour fastness of the fabrics.

PL

Opisano szereg właściwości istotnych dla tkanin maskujących. Sprawdzono właściwości mechaniczne, fizyczne i fizjologiczne wybranych tkanin. Analizowano również wpływ użytkowania na badane parametry. Wartości korelacji poszczególnych parametrów są stosunkowo bardzo wysokie. Testy ścieralności wykazały wyraźny wpływ na kolor i trwałość zabarwienia.

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Physiological properties of bacteria inhabiting polluted and unpolluted marine sandy beaches (Southern Baltic Sea)

Podgórska Beata, Mudryk Zbigniew Jan

Polish Journal of Ecology

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2007

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Vol. 55, nr 1

15-26

EN

The occurrence of bacteria displaying particular physiological properties was studied in polluted (Sopot) and unpolluted (Czołpino) marine sandy beaches (southern Baltic Sea). All eight isolated physiological groups of bacteria were much more numerous in polluted than in unpolluted beach. In polluted beach, bacteria hydrolyzing uric acid (32.5 cells 10[^3] g[^-1] dry w. of sand) and ammonifying bacteria (32.3 cells 10[^3] g[^-1] dry w. of sand) were the most numerous, while nitrifying bacteria were the least numerous (0.014 cells 10[^3] g[^-1] dry w. of sand). In unpolluted beach, bacteria hydrolyzing uric acid (0.66 cells l0[^3] g[^-1] dry w. of sand) and reducing methylene blue (0.18 cells l0[^3] g[^-1] dry w. of sand) were the most numerous, while no bacteria producing hydrogen sulphide from organic compounds or bacteria decomposing urea were isolated. In both beaches, considerable differentiation in the distribution of physiological groups of bacteria was found in a horizontal profile i.e. from the water-line to the middle of beach ([similar to] 60 m). Data concerning horizontal distribution of the physiological groups of bacteria in the sand of the polluted beach show that the majority of those groups was most numerous in the dune. No clear regularity in the distribution of physiological groups of bacteria was found in the horizontal profile of the unpolluted beach. Results of the present study indicate differences in the distribution of the physiological groups of bacteria in the surface (0-5 cm) and subsurface (5-10 cm) sand layers. Generally, in both studied beaches all physiological groups of bacteria were much more numerous in the surface than in the subsurface sand layer. The exception were bacteria reducing sulphates which in the polluted beach were most numerous at the depth of 5-10 cm.

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Neustonic versus planktonic bacteria in eutrophic lake

Kalwasińska A., Donderski W.

Polish Journal of Ecology

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2005

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Vol. 53, nr 4

571-577

EN

This paper presents the results of research on the number, the rate of secondary production and physiological properties of neustonic (surface microlayer SM ≈ 250 μm) and planktonic (subsurface water SSW ≈ 10-15cm) bacteria of the eutrophic lake (TP 30-99 μg l-1; TN 0.94-1.76 mg l-1; chlorophyll a 26.4-56.9 mg l-1; water transparency 1.2-1.9 m). It was found that the total number of neustonic bacteria (TNB) varied from 1.28 × 106 to 1.98 × 106 cells ml-1 and was from 1.4 to 2.0 times higher than the number of planktonic bacteria (P <0.001). TNB range for planktonic bacteria oscillated between 0.75 × 106 and 1.45 × 106 cells ml-1. The number of heterotrophic neustonic (SM) bacteria (CFU 22°C) was also higher by 2.0 to 13.3 times (P <0.001) being between 1.48 and 12.5 × 103 cells ml-1 while the CFU of bacteria in the SSW oscillated between 0.35 to 0.94 × 103 cells ml-1. Both the values of TNB and CFU displayed a distinct seasonal variation (P <0.001). However, the rate of secondary production of planktonic bacteria was higher (from 1.1 to 6.0 times) than the rate of production of neustonic bacteria (P <0.05) and displayed seasonal variability (P <0.001). The rate of secondary production in subsurface water ranged from 0.676 to 1.265 μgC l-1 h-1 while in surface microlayer from 0.118 to 0.597 μgC l-1 h-1. In neuston the bacteria decomposing fat and DNA were more common than in plankton (P <0.05).