Wyniki wyszukiwania - BazTech

1

Ocena podatności kompozytów cementowych z wypełniaczami organicznymi na oddziaływanie CO2

Bołtryk M., Krupa A.

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

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2015

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nr 1(15)

33--40

PL

W artykule przedstawiono wyniki badań nad właściwościami lekkich kompozytów cementowych z wypełniaczem organicznym typu trzcina pospolita (Phragmites australis) oraz trociny z drzew iglastych, będące produktem odpadowym występującym podczas obróbki mechanicznej drewna. Określono podatność kruszywa organicznego i kompozytu budowlanego na oddziaływanie dwutlenku węgla.

EN

The results concerning the determination of properties of lightweight cement composites with organic fillers, such as common reed (Phragmites australis) and conifer sawdust which are waste product that appears during the mechanical processing of wood are presented in this paper. Determined susceptibility of organic aggregates and composites to the impact on carbon dioxide.

2

Badania współczynnika trwałości peletów z trzciny pospolitej

Fiszer A., Dworecki Z.

Journal of Research and Applications in Agricultural Engineering

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2012

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Vol. 57, nr 2

69-72

PL

W artykule przedstawiono badania współczynnika trwałości dla peletów wykonanych z trzciny pospolitej i odniesiono otrzymane wyniki do współczynnika trwałości peletów ze słomy pszenicznej. Stwierdzono różnice badanych wielkości. Wskazano także na pracochłonność procedur badawczych i konieczność prowadzenia prac nad wpływem wilgotności na współczynnik trwałości.

EN

This paper presents the study of durability for common reed pellets and refers the results to durability of wheat straw pellets. Differences in researched quantities have been stated. Time-consuming testing procedures and the need to work on the influence of humidity on the durability factor have been also indicated.

3

Composition and distribution of epiphytic midges (Diptera: Chironomidae) in relation to emergent macrophytes cover in shallow lakes

Tarkowska-Kukuryk M.

Polish Journal of Ecology

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2011

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Vol. 59, nr 1

141-151

EN

The influence of emergent macrophytes (dominated by Phragmites australis (Cav.) Trin. ex Steud.) on the species composition, richness and abundance of epiphytic midges (Diptera: Chironomidae) was studied in five shallow lakes of eastern Poland during three seasons (May, July and October) of 2001. The lakes represented three states: clear (macrophyte dominated), intermediate (phytoplankton-macrophyte dominated) and turbid (phytoplankton dominated). The trophic status of lake strongly affected the assemblages of chironomids living on the surfaces of common reed. Habitat conditions regulated mostly densities and relative abundance of midge taxa and did not have any significant influence on the number of taxa. The Canonical Correspondence Analysis of epiphytic fauna showed the significance of 5 environmental variables: Secchi disc visibility, dissolved oxygen, reed density, concentration of total phosphorous and epiphytic chlorophyll-a. The analysis separated epiphytic midges into two groups. The first group included taxa limited by low oxygen content and water transparency and corresponds with clear state habitats. To the second group belong taxa typical of eutrophic waters with densities determined by the concentrations of total phosphorous and chlorophyll-a, common in lakes of intermediate state and in particular of turbid state.

4

Metale ciężkie w trzcinie pospolitej (Phragmites australis)

Sadecka Z.

Przemysł Chemiczny

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2008

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T. 87, nr 5

557-562

5

Effects of nutrient availability and competition between two grass species Leymus chinensis (Trin) Tzvel. and Phragmites communis Trin. on the plant performance

Ba L., Xiao N., Xu W., Wang D.

Polish Journal of Ecology

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2008

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Vol. 56, nr 3

453-462

EN

Leymus chinensis (Trin.) Tzvel., a perennial grass, is a dominant species from arid to semi-arid steppes in northern China and eastern Mongolia. Phragmites communis Trin. is also a perennial grass, and is distributed widely in the world. In the natural grasslands of northeastern China, both species always co-exist as co-dominating species due to their common characteristics such as propagation both by seeds and vegetative reproduction. Replacement series experiments were used to test the effects of nutrient availability and competitive interaction on the growth performance of two clonal plant species. The experimental treatments included five nutrient levels (3.6, 7.2, 10.8, 14.4 and 18.0 kg organic matter per pot, 20 cm diameter and 15 cm deep) and five species proportions (20:0, 16:4, 10:10, 4:16 and 0:20 for L. chinensis and P. communis, respectively) with twenty tillers in total per pot. Each treatment had 10 replications. Growth characteristics including tiller height, tiller number, plant biomass, rhizome length and bud number of plants in monoculture and mixture culture were recorded and compared to examine the effects of nutrient and competitive interaction on the plant performance. The growth of L. chinensis and P. communis in mixture was influenced by the nutrient availability and competition, which depended on the combination between nutrient level and species proportion. The results implied that the intensity of competition should be lower in nutrient-poor habitats when the co-existing species demanded on the same limiting resource. P. communis benefited from coexisting with L. chinensis, especially under nutrient-rich conditions. The aboveground relative yield (RY[above]) expressed in units of tiller height, dry biomass and daughter tiller number was recommended as an effective and simple index to predict the relative competitive ability for clonal plants. It was based on the regression for (RY[above] and RY[above] (the belowground relative yield) against RY (relative yield), measured as yield in mixture divided by that in monoculture.

6

Mineralizacja trzciny pospolitej (Phragmites communis Trin)

Bołtryk M., Rutkowska W.

Zeszyty Naukowe Politechniki Białostockiej. Budownictwo

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2005

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Z. 26

7-16

PL

W artykule przedstawiono wyniki badań własnych nad mineralizacją trzciny przy zastosowaniu różnych środków i preparatów chemicznych. W pierwszej serii badań trzcinę mineralizowano roztworem siarczanu glinu z wodorotlenkiem wapnia, w drugiej pastą bitumiczną z rozpuszczalnikiem organicznym. Określono wpływ mineralizacji trzciny na wybrane właściwości trzcinobetonu: wytrzymałość na ściskanie, gęstość pozorną i nasiąkliwość.

EN

The results of the investigation upon mineralization of common reed using different chemical agents and preparations are presented in this paper. In the first run reed was mineralized by the solution of aluminum sulfate and calcium hydroxide, in the second run by bituminous paste with organic dissolvent. The influence of reed mineralization upon chosen reed concrete properties: compressive strength, density and absorbability was evaluated.

7

Usuwanie fenolu przez wybrane rośliny mokradłowe - badania laboratoryjne

Chmielowska A. M.

Inżynieria Środowiska / Akademia Górniczo-Hutnicza im. S. Staszica w Krakowie

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2000

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T. 5, z. 2

279-292

PL

Związki organiczne stanowią poważny problem przy uzdatnianiu wody i oczyszczaniu ścieków. Są nie tylko toksyczne, ale również trudne do usunięcia. Konwencjonalne metody usuwania ich z wody są kosztowne i wymagają stosowania innych związków chemicznych. Dotychczas problem ten nie został do końca rozwiązany. Z tego powodu, uzasadnione wydaje się poszukiwanie nowych metod usuwania związków organicznych z wody. Do opisanych badań wybrano trzcinę pospolitą i fenol (jako toksyczny związek organiczny).

EN

Organic compounds constitute a serious problem in water and wa-stewater treatment. They are not only toxic, but they are also difficult to remove. Conventional wastewater treatment technologies are often expensive and require application of chemicals. Until now this problem has not been successfully resolved. That is one of the reasons it seems justified to investigate different methods of organic compounds removal. Common reed and phenol (as an organic contaminant) were used in researches mentioned below.