Wyniki wyszukiwania - Biblioteka Nauki

1

Growth rate of Pseudocalanus spp. as a function of food concentration, body weight and temperature

100%

Dzierzbicka-Głowacka L. , Zieliński A.

Oceanological and Hydrobiological Studies

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2003

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tom Vol. 32, No. 4

171-197

EN

This paper does not report the results of original research; it is an analysis of data from the literature. The aim of this project was to develop quantitative expressions to describe the effects of food concentration, temperature and body weight on the growth rate of copepodid stages of Pseudocalanus spp. Calculations were done for two geographically separate populations of Pseudocalanus – one from Puget Sound (Washington, USA) and the other from the southern North Sea- based on experimental data from the literature (see Vidal 1980, Thompson 1982). The relationships between the growth rate of Pseudocalanus from Puget Sound and temperatures in the range of 8o-15.5oC, food concentration and body weights ranging from 1.5 to 10 ěgd.w. (case 1) and 0.51 to 3.7 ěgC (case 2) were determined, as were those for Pseudocalanus from the southern North Sea at a high food concentration and at temperatures ranging from 4o to 15oC. The results demonstrate that the maximum growth rate decreased as temperature fell and that it become less dependent on temperature at higher body weights. The critical food concentration for growth increased with body size proportionally more at high than at low temperatures. Slight differences in growth rate were also detected between the two species of Pseudocalanus.

2

Development and growth of Temora longicornis: numerical simulations using laboratory culture data

100%

Dzierzbicka-Głowacka L. , Lemieszek A. , Żmijewska I. M.

Oceanologia

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2011

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tom No. 53 (1)

137-161

EN

Quantitative expressions are presented to describe the effects of temperature and food concentration on stage duration and growth rate of Temora longicornis for each of the model stage groups (N1-N6 - naupliar stages, C1, C2, C3, C4, C5 - the five copepodid stages). The calculations were made on the basis of experimental data from the literature for Temora longicornis from the south-eastern and the southern North Sea. Relationships were obtained between the growth parameters and temperature for the 5-10°C temperature range and food concentrations from 25 mgC m-3 to excess. Also computed was the total mean development time as a function of the above-mentioned parameters, temperature and food availability. The simulations computed here are similar to the experimental results. The growth rates for successive stages were obtained according to the correction of the "Moult Rate" method, which allows the use of mean weights and stage durations. The calculations also suggest that three complete generations of T. longicornis from the Gdańsk Deep (the southern Baltic Sea) can develop during a single year.

3

The situation on the credit market versus the rate of economic growth in chosen countries of East-Central Europe

100%

Mikołajczak P. , Skikiewicz R.

Ekonomia i Zarzadzanie

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2016

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tom 8

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nr 1

62-70

EN

The article concerns the comparative analysis concerning credit market situation on the background of economic growth changes in Poland, the Czech Republic, Lithuania and Hungary. The main objective of this article is to identify the similarities and differences in the economic situation of the whole economies and credits market conditions in individual countries. This relationship has been verified for each country. To determine the strength of the relationship between the dynamics of changes in the value of credits and GDP, Pearson correlation analysis was used. The basis of the analysis presented in the article was data from central banks, Central Statistical Office and Eurostat. Time horizon under investigation covered the period of 2004-2013. The results of analysis indicate that both the economic condition of entire economies, as well as the situation in the credit market remained diverse in all analyzed countries. Among the most significant similarities there was found that changes in the rate of economic growth in the analyzed countries remained at a moderate depending on the dynamics of changes in the credit market. Although the analyzed countries experienced a financial crisis, not all of them recorded a negative growth rate of GDP and credits.

4

Equivalence of rates of growth and egg production of Pseudocalanus

100%

Dzierzbicka-Głowacka L.

Oceanological and Hydrobiological Studies

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2005

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tom Vol. 34, No.4

19--32

EN

The equivalence of rates of growth and egg production is analyzed for well-fed females of Pseudocalanus from Puget Sound (Washington, USA) and from the southern North Sea. The hypothesis is tested using published data on the Pseudocalanus species. The growth rates of the copepodite stages for species from these two regions as a function of temperature and food concentration were used. Quantitative expressions describing the effects of temperature and the cephalothorax length of females on potential reproductive rate were compared. Food-saturated egg production was computed as the mean number of eggs per sac divided by 1.25 times the embryonic duration at the given temperature. The calculations were done based on experimental data from the literature for some geographically separate populations of Pseudocalanus from southwest Baffin Island, Nova Scotia, Long Island Sound, Scotland, and the southern North Sea and adjacent waters. These values were compared with the average number of eggs produced per day by one female obtained here as a function of growth rate, i.e., multiplying exp gmax – 1 from the growth rate equation by Wfemale/Wegg. The combined effect of food concentration and temperature as a function of these two parameters on egg production (reduced by food limitation) was also established for Pseudocalanus from Puget Sound. These assumptions and estimations appear to predict the temperature-length of female dependent daily rates of egg production of well-fed females of Pseudocalanus spp. for the above waters. Suggestions are made as to how to obtain and present data to test this hypothesis more thoroughly.

5

Prawa własności i tempo ich zmian

100%

Staniek Z.

Postępy Techniki Przetwórstwa Spożywczego

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2016

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tom Nr 1

156--164

PL

Wiązki praw własności stanowią jedną z podstawowych instytucji formalnych. Ich waga wynika z pełnionych funkcji w gospodarce, zwłaszcza funkcji motywacyjno -bodźcowej. Ekonomiczny charakter praw własności ulega stałym zmianom. Znajduje to wyraz w transferach praw własności zachodzących na rynkach odpowiednio regulowanych przez państwo. Procesy prywatyzacji przebiegają zawsze w konkretnych warunkach gospodarowania, przy odpowiednich proporcjach sektora prywatnego i publicznego. Przy zbyt dużym udziale sektora publicznego istnieje potrzeba transferów praw własności do sektora prywatnego, co dokonuje się w warunkach istnienia rynku prywatyzacyjnego. Rynek ten charakteryzują relacje popytowo-podażowe i kształtowanie cen prywatyzowanego majątku. W praktyce prywatyzacyjnej siły rynkowe ograniczone są działaniami instytucji odpowiedzialnych za prywatyzację (często działających w sposób nieskoordynowany), które kierują się różnego rodzaju interesami. Interes publiczny (interes Skarbu Państwa) rozumiany jako imperium czy dominium wymaga zapewnienia optymalnego tempa zmian praw własności. Tempo to prowadzi do realnych zmian w prywatyzowanych przedsiębiorstwach, do zwiększania ich konkurencyjności i tym samym sprzyjania konkurencyjności całej gospodarki narodowej. W dłuższym czasie wpływa na zwiększenie tempa wzrostu gospodarczego.

EN

Bundles of property rights are one of the basic formal institutions. Their importance results from the function that they play in economy, especially the motivational and incentive function. The economical character of property rights undergoes permanent changes. This is reflected in the transfers of property rights which take place in markets and which are suitably regulated by the State. The processes of privatisation always proceed in specific conditions of management, with appropriate proportions of the private and public sector. With a large share of the public sector there is a need of property rights transfers to the private sector, which takes place in the conditions of the existence of the privatisation market. This market is characerised by supply-demand relations and the price formation of the privatised property. In privatisation practice the market forces are limited by the actions of institutions responsible for privatisation (often acting in an uncoordinated way) which are guided by different types of interests. Public interest (the State Treasury’s interest) understood as empire or dominum requires ensuring an optimal pace of changes of property rights. This pace leads to substantial changes in privatised enterprises, increasing their competetiveness and thereby favouring the competetiveness of the whole national economy. In the long run this influences the growth rate of economic growth.

6

The effect of infestation with Diplostomum spp. on growth rate of Siberian sturgeon fry, Acipenser baeri Brandt

100%

Kolman R. , Kolman H. , Dzika E.

Wiadomości Parazytologiczne

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1998

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tom 44

|

nr 3

7

Postnatale Entwicklung weiblicher und mannlicher Jungrinder

100%

Panicke L. , Matthes H. D.

|

tom 12

8

Growth effect of aid and its volatility: An individual country study in South Asian economies

88%

Bhavan T. , Xu C. , Zhong C.

Business and Economic Horizons

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2010

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tom 3

|

nr 3

1-9

EN

This paper empirically investigates the growth effect associated with aid and its volatility during the period 1995-2008 in the case of five South Asian economies. The aid is classified into short impact, long impact and humanitarian aid. We obtained results for each of the country by employing two-stage least squares method. The results suggest that gross aid is positively associated with growth rate where as its volatility negatively effects growth rate South Asian countries. Short impact and long impact aid positively effect on growth rate whereas respective aid volatilities have negative affects on all the economies, excluding at least one country in each case. Humanitarian aid and its volatility have mixed results. Thus, we come to a conclusion that, aid and aid volatility have strong association with growth rate in the South Asian countries, but varies considerably from country to country in terms of magnitude of effect and in relation to the growth rates

9

Temperature Effect on the Growth Rate and Physical Characteristics of SnO2 Thin Films Grown by Atomic Layer Deposition

88%

Kim D. , Kim D. H. , Riu D.-H. , Choi B. J.

Archives of Metallurgy and Materials

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2018

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tom Vol. 63, iss. 2

1061--1064

EN

Among the various thin film coating techniques, atomic layer deposition (ALD) has features of good controllability of the thickness, excellent step-coverage in 3-dimensional object even in the sub-nm thickness range at the relatively low deposition temperature. In this study, SnO2 thin films were grown by ALD in the variation of substrate temperatures from 150 to 250°C. Even such a low temperature may influence on the growth kinetics of the ALD reaction and thus the physical characteristics of thin films, such as crystallinity, film density and optical band gap, etc. We observed the decrease of the growth rate with increasing substrate temperature, at the same time, the density of the film was decreased with increasing temperature. Steric hindrance effect of the precursor molecule was attributed to the inverse relationship of the growth temperature and growth rate as well as the film density. Optical indirect band gap energy (~3.6 eV) of the ALD-grown amorphous SnO2 films grown at 150°C was similar with that of the literature value, while slightly lower band gap energy (~3.4 eV) was acquired at the films grown at higher temperature.

10

Effects of warmness and spatial nonuniformity of plasma waveguide on periodic absolute parametric instability

88%

Zaki N. G. , Bekheit A. H.

Nukleonika

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2011

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tom Vol. 56, No. 4

305-309

EN

The periodic absolute parametric instability (API) of the low-frequency oscillations excited by a monochromatic pumping field of an arbitrary amplitude in a warm 1-D (one-dimensional) nonuniform magnetoactive plasma is investigated. The separation method can be used for solving the two-fluid plasma equations describing the system. By applying this method we were able to determine the frequencies and growth rates of unstable modes and the self-consistent electric field. Plasma electrons are considered to have a thermal velocity. Different solutions for the spatial equation can be obtained the following cases: A) API in a uniform plasma, B) API in a nonuniform plasma. The latter has been studied here for two cases: B.1) the exact harmonic oscillator and B.2) the bounded harmonic oscillator (a bounded plasma). An increment has been found in the build-up of the oscillations, and it has been shown that the spatial nonuniformity of the plasma exerts the stabilizing effect on the parametric instability. A reduced growth rate of API in the warm plasma, in comparison to the cold plasma, is reported. It has also been found that the warmness of the plasma has no effect on the solution of the space part of the problem (only through the separation constant).

11

Application of a Logistic Function to Describe the Growth of Fodder Galega

88%

Rymuza K. , Bombik A.

Journal of Ecological Engineering

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2017

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tom Vol. 18, nr 1

125--131

EN

It was attempted in the paper to describe the growth of oriental goat’s rue (Galega orientalis Lam.) growth by means of a logistic function. The studies demonstrated that the function describes empirical data well as the coefficients of determination obtained ranged between 97 to 98%, depending on the growing season. The estimated function parameters indicate that both the plant height and growth rate were conditioned by thermal conditions and moisture during the growing season. Plants had the longest stems in the year 2010 (127.9 cm), and the shortest in 2008 (105.9 cm). The maximum growth rate ranged from 2.12 to 3.97 cm per day in, respectively, 2009 and 2008. Also the inflection point, the point at which plants grew the fastest, depended on the conditions of the growing season.

12

The growth performance of selected spice crops in Haryana state

88%

Lal C. , Kait R.

Economic and Regional Studies

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2021

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tom 14

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nr 3

13

Age and growth rate of Pseudochaenichthys georgianus Norman, 1937 (family Chaenichthyidae) of the South Georgia region

88%

Chojnacki J. , Palczewski P. , Chojnacki J. , Palczewski P.

|

14

Studies on Pesticides Mixture Degradation by White Rot Fungi

88%

Gouma S. , Papadaki A. A. , Markakis G. , Magan N. , Goumas D.

Journal of Ecological Engineering

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2019

|

tom Vol. 20, nr 2

16--26

EN

The capacity of five white rot fungi species to degrade linuron, metribuzin and chlorpyrifos when applied both as single pesticides and mixed together in different concentrations on nutritionally poor media was investigated. Our results suggested that Pleurotus ostreatus, Pycnoporus coccineus, Phlebiopsis gigatea and Τrametes versicolor showed a remarkable tolerance to the pesticides, in all media tested. The EC50 values presented a noticeable difference in the mixtures as compared with the individual ones. The minimum growth rate in the mixture was obtained by P. ostreatus whereas P. coccineus appeared to be more efficient than the rest fungal isolates, when cultivated in the soil extract medium. P. coccineus, P. gigantea and T. versicolor produce high levels of polyphenol oxidase, but only T. versicolor was capable of decomposing linuron when combined with metribuzin and chlorpyrifos.

15

The Continuous Growth of Bulk Si by Temperature Gradient Zone Melting Method

88%

Li J. , Wang L. , Hao J. , Ni P. , Tan Y.

Archives of Metallurgy and Materials

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2019

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tom Vol. 64, iss. 1

271--278

EN

Temperature gradient zone melting (TGZM) method was used to obtain bulk Si continuously for the efficient separation and purification of primary Si from the Si-Al alloy in this work. The effects of alloy thickness, temperature gradient and holding time in TGZM purification technology were investigated. Finally, the continuous growth of bulk Si without eutectic inclusions was obtained. The results showed that the growth rate of bulk Si was independent of the liquid zone thickness. When the temperature gradient was changed from 2.48 K/mm to 3.97 K/mm, the growth rate of bulk Si was enhanced from 7.9×10-5 mm/s to 2.47×10-4 mm/s, which was increased by about 3 times. The bulk Si could grow continuously and the growth rate was decreased with the increase of holding time from 1 h to 5 h. Meanwhile, low refining temperature was beneficial to the removal of impurities. With a precipitation temperature of 1460 K and a temperature gradient of 2.48 K/mm, the removal rates of Fe, P and B were 99.8%, 94.0% and 63.6%, respectively.

16

Selected elements of the biology of ruffe [Gymnocephalus cernuus L.] of the Vistula Lagoon

88%

Rychter A.

Bulletin of the Sea Fisheries Institute

|

1997

|

nr 2

17

Growth rate of Scenedesmus acutus [Meyen] in cultures exposed to trifluralin

88%

Cetin A. K. , Mert N.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 4

EN

The objective of this study was to determine the effect of trifluralin on the growth of Scenedesmus acutus in comparison to growth without trifluralin during 5 days. For growth in trifluralin 20-40 |g/L, four days of S. acutus growth occurred compared to growth in the absence of trifluralin. This decrease in growth in S. acutus was correlated with an increased amount of trifluralin concentration. At trifluralin concentration of 60 |g/L, growth was maintaned for three days. S. acutus in the presence of at 80 |g/L trifluralin showed one-day growth. It was concluded that increasing trifluralin concentration decreased growth of S. acutus in a dose-dependent manner.

18

The growth rate and condition of asp Aspius aspius [L., 1758] from Miedzyodrze waters

88%

Kompowski A. , Neja Z.

Bulletin of the Sea Fisheries Institute

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2003

|

nr 3

19

Effect of IAA and 4-Cl-IAA on growth rate in maize coleoptile segments

88%

Karcz W. , Luthen H. , Bottger M.

Acta Physiologiae Plantarum

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1999

|

tom 21

|

nr 2

EN

The dose-response curves for IAA and 4-Cl-IAA-induced growth of Zea mays L. coleoptile segments were studied as a function of time. Moreover, some characteristic growth parameters for both auxins were compared. The dose-response curve of growth rate measured after IAA or 4-Cl-IAA application was bell-shaped in all experiments. The optimum concentration was 10⁻⁶ M for 4-Cl-IAA and was found not to depend on the time of the growth measurement. However, in the case of IAA the optimum shifted from 10⁻⁶ M at the time of maximal growth rate to 10⁻⁵ M or even 10⁻⁴ M, when growth measured 3–4 hours after auxin application was analysed. The relative activity of 4-Cl-IAA-induced growth rate (as compared to IAA) increased significantly with increasing time from addition of this auxin to the medium. For both auxins the time needed to reach the maximal growth rate was clearly related to their concentrations. These data provided further evidence that 4-Cl-IAA is much more active auxin than IAA and can also suggest that IAA is more rapidly metabolized in comparison to 4-Cl-IAA.

20

Reducing Nitrate and Phosphate Concentrations in Shrimp Wastewater Aquaculture Using Gelidium corneum

75%

Indraswari N. , Adharini R. I.

Ecological Engineering & Environmental Technology

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2022

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tom Vol. 23, iss. 5

137--144

EN

Shrimp culture wastewater contains residual feed and shrimp metabolism. Shrimp wastewater if not managed properly will be harmful to the long term viability of the farming itself and threatens environmental sustainability. This study aims to determine the potential and effectiveness of Gelidium corneum with different densities as a biofilter for vaname shrimp culture waste. This study used a completely randomized design method consisting of 3 treatments and 3 replications using different density treatments, namely T1 (1 gL-1); T2 (2 gL-1); and T3 (3 gL-1) in an aquarium volume of 30 L. The parameters observed included the concentration of nitrate, phosphate, temperature, TDS, TSS, salinity, DO, pH. Absorption effectiveness and growth of G. corneum were measured at the beginning and end of the study. G. corneum is able to reduce the concentration of phosphate in water is higher than lowering the content of nitrate. G. corneum with a density of 1 gL-1 showed the best performance in absorbing nitrate by 8% on day 15. While the 2 gL-1 treatment was able to reduce the phosphate concentration by 92% in 25 days. Absorption of Total Nitrogen content in the thallus obtained in the treatment of 2 gL-1 was 32% and total phosphate was 58% for 25 days. Therefore G. corneum can be used as a candidate for commodity in Integrated Multi Trophic Aquaculture (IMTA).