Wyniki wyszukiwania - Biblioteka Nauki

1

Kapitał jako czynnik postępu technicznego – wybrane aspekty

100%

Ciborowski R.

Ekonomia XXI Wieku

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2015

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nr 3 (7)

9-29

PL

Models of accumulation show that capital goods have equal productivity and using them goods having similar quality can be produced. However, productivity increases together with technological change and the quality of goods gets higher. Capital accumulation influences technological change and technological change creates terms of new accumulation. Capital and the degree of its utilization have direct influence on technological capabilities of economy creating terms of faster economic development. The role of capital in different periods and economic approach evaluated but it was always a key factor of economic growth. Changes in the structure and character of capital directly decide about the efficiency of technological change reflected in the rate of profits and the level of savings, which influences the level of capital accumulation. High-level accumulation economies can pursue growth based on innovation, others have to find sources of capital gain. It is difficult because in a lot of countries a huge part of capital is wasted by inflation and public debt limiting sectors producing tangible goods. The use of innovation processes needs more widely capital resources. It may be accomplished through the reduction of constraints and the costs of raising and holding capital.

2

Accumulation of polonium by Mytilus trossulus under experimental conditions

100%

Stepnowski P. , Kożuch J.

Oceanological Studies

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1999

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tom Vol. 28, No. 1-2

73-82

EN

The bioaccumulation of polonium in the Baltic mussel Mytilus trossulus was studied experi-mentally in an attempt to discover the differences between food and water as sources of polonium. The 209Po isotope was used as tracer for accumulation and excretion. The highest 209Po con-centration was found in the hepatopancreas of mussels exposed to spiked water for 24 days. Both parts of the experiment (exposure to food and water) showed that while the rate of bioaccumula-tion of polonium by Mytilus trossulus was very high, the excretion rate was also relatively high. Furthermore, in both cases the duration of the accumulation-excretion (a-e) cycle of polonium in Mytilus trossulus was 10 days. Finally, a simple mathematical model approximating the experimental data was developed.

3

Forecasting deflections of plates in case of perception of transient loads

100%

Burakovskiy E. P. , Burakovskiy P. E.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2014

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tom nr 39 (111)

43--46

EN

In this paper the results of experimental research of residual deflection accumulation process in plates under the influence of repeated static loads in the mode of “creeping” and “relaxing” are presented. The main ideas of the nature of plate deformation, which make it possible to take into account the history of loading resulting deformation, and the results of modeling the process of accumulation of residual deflections in the use of short-term service loads are formulated in this document.

4

Lower Famennian evaporities within the Pripyat Though (Belarus)

100%

Kruchek S. A. , Vysotsky E.

Biuletyn Państwowego Instytutu Geologicznego

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1999

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tom nr 387

43--44

5

Determination of heavy metals in some tissues of four fish species from the Karasu River (Erzincan, Turkey) for public consumption

100%

Tanır Ö. Z.

Oceanological and Hydrobiological Studies

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2021

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tom Vol. 50, No. 2

232--246

EN

The study aimed at determining the concentration of heavy metals in muscle, liver, and gill tissues of four fish species (Acanthobrama marmid, Capoeta umbla, Capoeta trutta and Chondrostoma regium) collected from five sites in the Karasu River, Erzincan, between July 2019 and January 2020. The relationships between fish size (length and weight) and metal concentrations in the tissues were also investigated using Pearson correlation analysis. Concentrations of Al, Fe, Cu, Mn and Zn were higher than those of other metals in all tissue samples from four fish species. Fe and Al concentrations were very high, while the lowest Co, Cd and Pb concentrations were determined in the muscle, liver and gill tissues. The results of Pearson correlation analysis showed that significant relationships between heavy metal concentrations and fish size (length and weight) were positive (p < 0.01, p < 0.05), except for a few cases. Furthermore, heavy metal concentrations in the edible parts (muscle) of the studied fish species did not exceed the maximum acceptable concentrations (MACs) proposed by national and international food standards and were safe within human consumption limits, except for Cr.

6

Urządzenia i systemy grzewcze z akumulacją ciepła do indywidualnego ogrzewnictwa

100%

Zuwała J.

Ciepłownictwo, Ogrzewnictwo, Wentylacja

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2007

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tom R. 38, nr 2

28-29

PL

Problem akumulacji ciepła wynika najczęściej z niezgodności czasowej pomiędzy wytwarzaniem a zapotrzebowaniem na nośnik energii. Zjawisko tego rodzaju najczęściej dotyczy energii elektrycznej, ale również podaż i popyt na nośniki ciepła grzejnego (para i gorąca woda) nie ma charakteru symultanicznego. Konieczność akumulacji ciepła wynika z potrzeby pokrycia szczytowego (chwilowego) zapotrzebowania na duży strumień nośnika energii. Akumulację ciepła stosuje się również tam, gdzie właściwości urządzenia wytwórczego nie pozwalają na zapewnienie dostawy ciepła w każdej chwili, w dostatecznej ilości i odpowiedniej jakości. Urządzenia, w których magazynuje się ciepło noszą nazwę zasobników ciepła lub akumulatorów ciepła.

EN

The principle of operation and exploitation advantages of a heat accumulator is presented.

7

Bioaccumulation of Macro- and Microelements in Herbaceous Plants in the River Valley

88%

Parzych A. , Jonczak J.

Journal of Ecological Engineering

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2018

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tom Vol. 19, nr 3

170--177

EN

The research was done in the upper course of the Kamienna Creek which is the left-bank tributary of River Słupia situated in the northern part of Poland within Leśny Dwór Forest Inspectorate area. The aim of the study was the comparison of accumulation properties of herbaceous plants in spring niches in relation to macro- and microelements. The shoots of research plant species showed a good supply of macro- and micronutrients. The highest contents of nutrients were found in the shoots of Athyrium filix-femina (Ni), Caltha palustris (Mg, Ca, Sr), Cardamine amara (K, Zn, Fe, Al), Carex rostrata (Mn) and Solanum dulcamara (N, P, Cu), and the lowest in shoots of Ajuga reptans (P, Zn, Mn), Cardamine amara (N, Cu) and Carex rostrata (K, Mg, Ca, Sr, Ni, Fe, Al). Herbaceous plants accumulated from 1767.23 mmol c99%), and microelements ranged from 0.33% in Solanum dulcamara to 0.67% in shoots Cardamine amara. The share of nitrogen was from 38.8% to 56.8% of this amount, phosphorus from 2.9% to 3.9%, potassium from 28.5% to 40.6%, magnesium from 4.8% to 7.6%, and calcium from 4.6% to 16.4%. A large share of iron (from 33.7% Athyrium filix-femina to 39.5% Caltha palustris), manganese (from 9.2% Cardamine amara to 28.8% Carex rostrata) and aluminum (from 16.7% Carex rostrata to 40.8% Cardamine amara) in total measured components indicates excessive downloading them through plants. During the three years of research done in spring niches, it was found that some plant species take up nutrients in the quantities exceeding their physiological demand, which enables to use some of them for forming e.g. artificial wetlands, stopping many impurities and forming protective barriers.

8

The content of macro and microelements in the shoots of Glyceria maxima of the Słupia River

88%

Parzych A. , Cymer M.

Journal of Ecological Engineering

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2014

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tom Vol. 15, nr 4

29--36

EN

The study shows the content of macro- and microelements in the leaves and rhizomes of Glyceria maxima of the Słupia River in Słupsk. The content of macro and micro-elements in G. maxima was analyzed for each component separately and in an integrated way, and comparing the demand for nutritions. The largest quantity of nitrogen, phosphorus, potassium, magnesium and calcium were found in the leaves, meanwhile zinc, iron, manganese, nickel and copper in the G. maxima rhizomes. The amount of Zn and Cu, in all of the tested positions, within the range of the limit for the plants, and the concentrations of Ni and Mn exceed physiological needs. The U Mann Whitney test showed a number of statistically significant differences in the concentration of the analyzed elements in leaves – rhizomes, leaves – bottom sediment and rhizome bottom sediment relation. The relations between designated heavy metals formed a following series: Mn>Fe>Zn>Ni>Cu in leaves and Fe>Mn>Zn>Ni>Cu in rhizomes. The G. maxima shoots accumulated 985.8 do 1441.4 mmolc∙kg-1 in all the analyzed components, and the lower value of the sum of the accumulated macro and microelements were found in rhizomes. The sum of ion comospition of the macronutrients in the leaves and rhizomes was similar. The content of nitrogen was 51.7–53.7% of this amount, 5.8–8.6% phosphorus, potassium 22.8 – 26.6%, 4.9-5.8% of magnesium, calcium, 8.2–11.9%, and trace elements were 0.58% in total, in the case of leaves and 8.70% in the rhizomes.

9

Trend Analyses of River Dragacina Runoff for Identification of the Water Availability and Accounting for Water Needs

88%

Kusari L. , Osmanaj L. , Bungu S. , Thaqi P. , Hajdari V.

Journal of Ecological Engineering

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2022

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tom Vol. 23, nr 7

246--256

EN

This study aimed to analyze the available amount of water in the Dragaçina River to meet the different water needs in the Municipality of Suhareka. The water problems in this city are more pronounced, especially in the vegetation period of July–September, where the area is significantly affected by drought. The Dragacina River carries about 10 hm3 of water per year, and affected neither by urbanism nor massive deforestation of the basin. However, there are no multi-year measurements of inflows for this river, whether they are average, maximum or minimum ones. Therefore, the study is based on several multi-annual monthly rainfall measurements and some characteristics of the Dragaçina River Basin. Knowing the average annual flow coefficient η = Peff / Pbruto it is possible to convert these precipitations to Peff [mm] flow and then to monthly flow. The inputs for other years from 1983/84 onwards are obtained by simulating time series. Then, for such inflows, the probability distribution functions of small waters are assigned and the usable volume balance is carried out. Assuming an average annual withdrawal from the reservoir QAmin mes. = 0.63 × Qmes. which should be constant throughout the years, then the length of the critical period will be 0.13 years or approximately 48 days, for PH = 95%. Starting from the initial acquired volume of 1 hm3 it is possible to achieve 95% < PH < 99%. Therefore, it follows from this analysis that this river can provide a significant amount of water for the needs of the Municipality of Suhareka.

10

The influence of marine and lacustrine humic substances on the accumulation of cadmium by the Baltic mussel Mytilus trossulus

88%

Kożuch J. , Pempkowiak J. , Gjessing E.

Oceanologia

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1998

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tom No. 40 (1)

39-49

EN

The accumulation of cadmium by the Baltic mussel Mytilus trossulus in the presence of marine and lacustrine humic substances (HS) was investigated under laboratory conditions. The tested organisms were exposed to Baltic Sea water (salinity 7.0 PSU, pH 7.85) spiked with cadmium (50 μg Cd l -1) and humic substances (6.0 mgHS l -1), isolated from either marine (6 sampling sites) or lacustrine (8 sampling sites) environments. Experiments were carried out at a constant seawater temperature of (10±C1oC). The exposure time was 21 days. On average, the humic substances, a fraction of naturally occurring organic matter, were found to stimulate cadmium accumulation in the mussels. Lacustrine humic substances stimulated cadmium uptake to a lesser extent than the marine ones. Cadmium was accumulated preferentially in the hepatopancreas, and to a smaller extent in the gills and muscles, regardless of the presence, properties and origin of the humic substances. However, the effect was modified by the dissimilar physical and chemical properties of the substances, which were related to their place of origin.

11

Accumulation of poly(A) RNA in the Cajal bodies and nucleus

88%

Rudzka M. , Kolowerzo A. , Smolinski D.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2014

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tom 56

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nr 1

12

Above - water accumulative forms within the shore zone of the reservoir showing significant seasonal water level fluctuations based on the Pakoski reservoir'

88%

Grobelska H.

Landform Analysis

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2008

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tom Vol. 6

28--40

EN

The Pakoski reservoir .was created in 1975 as a result of damming the lakes located within the Western Valley of the Noteć River. This reservoir operates in rearly cycles with water level fluctuations of up to 3.6 m. The researches carried off by the author in the years 1998-2003 indicate that the thirty-year exploitation period has not ended the intense reshaping phase of the shore zone of the reservoir. Both intensive shore abrasion and various accumulative forms support the above statement. These forms include the small ones of distinctively initial character, such as accumulative spurs or berms, as well as the complex ones whose shaping process has almost finished and the area of which exceeds a few hundred square metres. Due to constant lowering of the water level, accumulative forms occur within the entire width of the shore-platform which is being dried. In most cases these are whole groups of smaller forms related to one another. A beach can constitute a good example, as it predominantly combines a few, most often 5 to 6, adjoining beach ridges separated with small lagoons.

13

Manganese accumulation by two species of Chara

88%

Urbaniak J.

Oceanological and Hydrobiological Studies

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2010

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tom Vol. 39, No.4

145-154

EN

This paper reports the results of Mn accumulation in two species of green algae: Chara globularis and Chara hispida. The results of laboratory and field experiments show a rapid accumulation of Mn by charophytes and demonstrate that deposit formation on the plant surface in the so-called adsorption phase occurs in Mn accumulation. Both species can be an important factor in Mn circulation in lakes.

14

Determination and mapping of cadmium accumulation in plant leaves on the highway roadside, Turkey

88%

Çolak M. , Gümrükçüoğlu M. , Boysan F. , Baysal E.

Archives of Environmental Protection

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2016

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tom Vol. 42, no. 3

11--16

EN

This study investigates cadmium (Cd) accumulation in the plant leaves of juglans regia (walnut) and cydonia oblanga (quince) trees related to traffic emissions on the highway roadside. The plant leaf samples were collected from 20 sites on the D-100 Highway roadside and washed with deionized water before analyzed. Determination of Cd was carried out using an inductively-coupled plasma-mass spectrometer after microwave digestion of the samples. Cd concentration on the plant leaves was found to be between 0.04–0.11 mg/kg. In order to determine the traffic-based emissions, vehicles were counted and an emission inventory was prepared. 0.18 tons of Cd was found to be delivered into the atmosphere every day. Cd accumulation depends on traffic density because there were no residential area and industrial plants. The distribution of Cd accumulation caused by traffic emissions was mapped by using a geographic information system (GIS). The maps showed that the Cd accumulation was high in the areas near the highway and then gradually decreased by moving away from the highway.

15

Heavy metal accumulation in wild plants: implications for phytoremediation

88%

Porebska G. , Ostrowska A.

Polish Journal of Environmental Studies

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1999

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tom 08

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nr 6

EN

The work undertakes the issue of Zn, Cu, Pb, Cd, Ni and Cr accumulation in wild grown plants in the context of their possible use for the sanitation of sludge and waste substrates. The highest contents of heavy metals were noted in Lactuca serriola, Chenopodium album, Artemisia vulgaris and Atriplex nitens. Assuming maximum crop production which is to be obtained from sludge and waste substrates at a level of 2 kg d.w./m2, it is clear that from 1 hectare several hundred grams of Pb and Cd, as well as up to 2 kg of Cu and 20 kg of Zn may be removed.

16

Accumulation of polyphenolic acids in the herb of five populations of Hypericum genus

88%

Osinska E.

Folia Horticulturae

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2003

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tom 15

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nr 1

17

Changes in nitrate content of red beet caused by different methods of nitrogen fertilization

88%

Grzebelus D.

Folia Horticulturae

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1995

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tom 07

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nr 2

18

Methyl jasmonate stimulates the formation and the accumulation of anthocyanin in Kalanchoe blossfeldiana

88%

Saniewski M. , Horbowicz M. , Puchalski J. , Ueda J.

Acta Physiologiae Plantarum

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2003

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tom 25

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nr 2

19

Non-lymphoid cultured cells possess a system controlling cellular compatibility

88%

Sashchenko L. P. , Dukhanin E. A. , Ioudinkova E. S. , Iarovaia O. V. , Lukianova T. I. , Razin S. V.

Cellular and Molecular Biology Letters

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2000

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tom 05

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nr 2

20

Changes in nitrate content of red beet with growing time

88%

Grzebelus D.

Folia Horticulturae

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1995

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tom 07

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nr 2