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Znaczenie histogramu w ocenie jakości włókna alpak, przydatności tekstylnej i selekcji zwierząt

Morales Villavicencio Anna, Niżnikowski Roman

Przegląd Włókienniczy - Włókno, Odzież, Skóra

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2023

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nr 3

22--27

PL

Alpaki w Polsce w 2020 roku zostały uznane za zwierzęta hodowlane. Kolejnym etapem w rozwoju hodowli alpak w kraju było opracowanie wzorca dwóch ras alpak: Huacaya i Suri i wydanie decyzji przez MRiRW o prowadzeniu oceny wartości użytkowej tych zwierząt przez Stowarzyszenie Hodowców Alpak i Lam. Jednym z istotnych kryteriów jest ocena jakości runa w oparciu o analizę histogramu. W ten sposób runo alpak zostało docenione jako surowiec i poprzez prace badawcze i selekcyjne możliwe jest doskonalenie jego jakości a także zwierząt, które go produkują. Histogram jest stosowany do opisu zmian w badaniu grubości włókna alpak oraz parametrów statystycznych takich jak: odchylenie standardowe, współczynnik zmienności, wskaźnik komfortu. Umiejętna interpretacja wyników dostarcza informacji o jakości włókna i prognozy zmian w jakości na przestrzeni czasu.

EN

Alpacas in Poland in 2020 were recognized as farm animals. The next stage in the development of alpaca breeding in the country was the development of a standard for two alpaca breeds: Huacaya and Suri, and the decision of the Ministry of Agriculture and Rural Development to conduct an assessment of the working value of these animals by the Alpaca and Lama Breeders Association. One of the important criteria is the assessment of fleece quality based on histogram analysis. In this way, alpaca fleece has been appreciated as a raw material and through research and selection work it is possible to improve its quality as well as the animals that produce it. The histogram is used to describe changes in the alpaca fiber thickness test and statistical parameters such as: standard deviation, coefficient of variation, comfort index. Skilful interpretation of the results provides information about the quality of the fiber and forecasts of changes in quality over time.

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Development of an Electrospun Nanofibrous Web with Hyaluronic Acid

Milašius R., Ryklin D., Yasinskaya N., Yeutushenka A., Ragaišiene A., Rukuižiene Ž., Mikučioniene D.

Fibres & Textiles in Eastern Europe

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2017

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Vol. 25, no. 5 (125)

8--12

EN

Textile materials with an electrospun nanofibrous web can be used fo ar wide range of applications, including medicine and health care. In this research, polyamide-6 and hyaluronic acid were used for the development of a nanofibrous web via electrospinning. Hyaluronic acid is one of the most interesting ingredients used in skin care. It is very important that the electrospun polyamide-6 nanofibrous structure binds nanoparticles of hyaluronic acid not covering the surface of these particles. The main goal of this work was to develop an electrospun nanofibrous polyamide-6 web with hyaluronic acid which can be used for health care and/or cosmetology A. polyamide-6 nanofibrous web with hyaluronic acid was successfully developed via electrospinning. The presence of hyaluronic acid in the nanoweb was confirmed after web treatment with hot (95%) water. Hyaluronic acid was transported from the spinning solution to the electrospun web, was not isolated from the environment by polyamide-6, and could interact with human skin.

PL

Materiały tekstylne z elektroprzędzionym runem znajdują szeroki zakres zastosowań w produkcji materiałów do zastosowań medycznych. W pracy wytworzono za pomocą elektroprzędzenia runo z poliamidu 6 i kwasu hialuronowego. Kwas hialuronowy jest jednym z najbardziej obiecujących składników stosowanych w pielęgnacji skóry. Istotne jest, aby struktura nanowłókna poliamidowego wiązała nanocząsteczki kwasu hialuronowego, nie pokrywając powierzchni tych cząstek. Głównym celem pracy było opracowanie runa poliamidowego z kwasem hialuronowym, które może być zastosowane w wyrobach medycznych i/lub kosmetologii.

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Post-fire changes of soil seed banks in the Elary succesionsl stage of pine forest

Kwiatkowska-Falińska A., Jankowska-Blaszczyk M., Jaroszewicz B.

Polish Journal of Ecology

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2014

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Vol. 62, nr 3

455--466

EN

Our research was conducted on abandoned fields which had been undergoing spontaneous succession for 40–50 years and then were partly burnt. The main objective of the study was to examine if spontaneous fire in the early successional stage of pine forest causes a decrease in the number of species, diversity and density of seed banks, and an increase in the share of species forming long term persistent seed banks. Standing vegetation and soil seed banks were studied on 20 permanent plots on adjacent burnt and unburnt sites one and twelve years after spontaneous fire. One year after the fire the number of species in the seed banks of both areas was similar (11 and 12 species). In the burnt area the Shannon index and the floristical similarity between the seed bank and standing vegetation were lower, and seed density five times higher than in the unburnt area (15 691.5 m-2 vs.3426.5 m-2). This was mainly the effect of the high number of seedlings of Calluna vulgaris (L.) Hull and Spergula morisonii Boreau germinating from the burnt plots. Twelve years after the fire the number of species in both seed banks had increased little, but seed density in the burnt area (1742.5 m-2) had decreased 16 times, while that of the unburnt area had changed only slightly (2875.5 m-2). At the same time the Shannon index for the burnt area increased considerably, whereas for the unburnt one it did not change. Our study shows that the long-term persistent soil seed bank plays a fundamental role at the beginning of the post-fire regeneration of temperate coniferous forest vegetation. Germination of Calluna seedlings from the burnt soil seed banks in several times higher numbers than from unburnt soil seed banks may suggest that heat from the fire promotes a loss of dormancy in the heather seeds.

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Ten years of change in ground-layer vegetation of European beech forest in the protected area (Ojców National Park, South Poland)

Łysik M.

Polish Journal of Ecology

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2008

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Vol. 56, nr 1

17-31

EN

Long-term changes in ground-layer vegetation of unique stand of Carpathian beech forest Dentario glandulosae-Fagetum considered partly as a natural succession due to climatic changes and partly as a response to canopy dynamics, were investigated in the Ojców National Park (South Poland). Species composition and structure of the herb layer in the permanent research area were compared in 1993 and after ten years. About 77% of the study area was changed in this period, but the spatial pattern of distribution and intensity was highly mosaic. The mean intensity of changes calculated according to formula (1) derived from changes in percent cover of species was 42%. Herb cover decreased by about 15%, probably due to the rapid development of natural recruitment of trees in the study area (48% of area was covered by dense tree recruitment). In the same time the number of plant species and vegetation types (homogeneous vegetation patches of the size at least 1m2, that differed from neighbouring patches in species composition and/or species share) increased substantially. It is probably due to greater variation of light condition in ground layer created as a result of canopy gaps dynamics (the area of windthrow mounds in the study area increased approximately eight times between 1993 and 2003). There was a significant decline of species typical for beech forests, especially of vernal geophytes like Dentaria glandulosa W.K. and Isopyrum thalictroides L. Although it is too early to predict any directional changes, it is possible that the beech forest community will change into the Tilio-Carpinetum association in some parts of study area. Nowadays the expansion of invasive alien species Impatiens parviflora DC. is the great threat to the forest vegetation of the protected study area and the Ojców National Park. This species in 10 years managed to displace native species in 3% of the study area. The drastic decrease in herbaceous plants cover connected with increase in tree seedlings and saplings, systematic decline of vernal geophytes and typical beechwood species, diversification of ground vegetation structure and composition, and finally occurrence of non-native invasive plant species inform about highly dynamic nature of climax beech forests and generally of temperate forests. Changes are induced probably by both changing climate and overstorey dynamics.