Wyniki wyszukiwania - Biblioteka Nauki

1

Seasonal fluctuations and long-term trends of nutrient concentrations in the Polish zone of the Baltic Sea

100%

Trzosinska A.

Oceanologia

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1990

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tom 29

2

Seasonal fluctuations of photosynthetic pigments content in Taxus baccata needles

100%

Zarek M.

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2016

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tom 76

EN

Yew is a coniferous, evergreen, dioecious species. The objective of the study was to present a comprehensive characteristic of changes occurring throughout the year in terms of the content of photosynthetic pigments and related compounds in the needles of yew, depending on the sex of individuals and age of needles. Eight compounds, particularly chlorophyll a (Chl a), chlorophyll b (Chl b), carotenoids (Car), protoporphyrin IX (PPIX), magnesium protoporphyrin IX (MgPPIX), protochlorophyllide (Pchlide), chlorophyllide a (Chlide a), and chlorophyllide b (Chlide b), were subjected to quantitative analysis. Based on the several parameters under study, significant differences between male and female individuals were observed, while most commonly, the largest differences were reported in the autumn and winter period. They were related to the content of Chl a, Chl b and Chl/Car ratio. The remaining compounds showed no significant differences according to the sex and were slightly different only in single periods. For all the studied parameters except for Chl/Car ratio, interaction between sampling dates and sex was not statistically significant. Significant differences between the needles of different age were observed only in terms of the content of Chl b, MgPPIX, Pchlide, Chlide b, and Chl a/b ratio, and these differences were always caused by the current-year needles.

3

The occurrence and activity of sulphate-reducing bacteria in the bottom sediments of the Gulf of Gdańsk

100%

Mudryk Z. J. , Podgorska B. , Ameryk A. , Bolalek J.

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nr 1

EN

The paper presents the results of investigations concerning the number, distribution and physiological activity of sulphate-reducing bacteria (SRB) inhabiting the bottom sediments of the Gulf of Gdańsk. The numbers of this group of bacteria range between 0.76 × 103 and 1.27 × 104 cells per g wet sediment. The bacterial sulphate reduction rate in bottom sediments of this area of the Baltic Sea varies from 1.89 to 31.6 nM SO2− 4 g−1 24 h−1. The numbers of SRB and their physiological activity were subject to considerable seasonal fluctuations, maximum values being noted in summer (June) and minima in spring (April). A direct relationship has been found between the number of SRB and hydrogen sulphide concentrations; there is, however, no such relationship with reference to sulphate concentrations. The numbers and distributions of SRB demonstrated considerable variation in a depth profile of bottom sediments. SRB inhabiting the bottom sediments of the Gulf of Gdańsk were able to use three different organic substrates (lactate, acetate, propionate) as electron donors and as carbon and energy sources.

4

Cyanobacteria in a slightly eutrophic lake: seasonal fluctuations and contribution to total phytoplankton

100%

Szelag-Wasielewska E.

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tom 34

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nr Suppl.3

5

Seasonal fluctuation of the prevalence of cymothoids representing the genus Nerocila (Crustacea, Isopoda), parasitizing commercially exploited marine fish from the Malabar Coast, India

80%

Aneesh P.-T. , Sudha K. , Arshad K. , Anilkumar G. , Trilles J.-P.

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nr 1

EN

The presently reported study investigated seasonal fluctuations in the prevalence in four species of Nerocila infesting commercially exploited marine fishes representing the families Engraulidae, Clupeidae and Ambassidae, from the Malabar coast (Kerala, India). Seven of 56 fish species belonging to 23 families were infested by either one or two species of Nerocila. All the collected Nerocila species showed significant seasonal fluctuations in the prevalence of infestation, reaching maximum from October through April and minimum (or total absence of the parasites) from May through September. Such fluctuations were analyzed based on environmental parameters. Body surface, postero-ventral side of the head and the lateral line of the host fish form the major infestation site for the recovered Nerocila species. Skin lesion and hemorrhages were observed on the fish parasitized with these cymothoids.

6

Oxygen and nutrients in the southern Baltic Sea

80%

Trzosinska A. , Lysiak-Pastuszak E.

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nr 1-2

7

Wahania sezonowe w zawartości hemoglobiny we krwi u dzieci szkolnych

70%

Zahorska A.

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nr 3-4

8

Wpływ systemu wodno-melioracyjnego na wahania zwierciadła wody gruntowej na zalesionych użytkach rolnych

70%

Kowalczyk T. , Plywaczyk A. , Orzepowski W.

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nr 2

PL

W artykule przedstawiono wyniki analizy przestrzennej średniej rocznej amplitudy wahań zwierciadła wody gruntowej określonej na podstawie badań stosunków wodnych wykonanych w latach hydrologicznych 2001-2008 na zmeliorowanych zalesionych gruntach porolnych w rejonie Wrocławia. Celem badań było określenie wpływu systemu wodno-melioracyjnego na dynamikę pierwszego poziomu wodonośnego. Stwierdzono, że na terenach położonych w rejonie cieków naturalnych roczna amplituda wynosi około 50 cm, a w rejonie objętym regulowanym odpływem z lokalnej mikrozlewni oraz sztucznie podpiętrzanego zbiornika wodnego wzrasta ona do 75-100 cm.

EN

Spatial analysis of the mean annual amplitude of the ground water table changes is presented in this paper. Data were collected during the survey research carried out in the hydrological years 2001-2008 at the study site located on the reclaimed and reforested post-arable lands near Wroclaw. The aim of the study was to assess the influence of the land reclamation system on hydrodynamics of the 1st groundwater layer. It was recognized that the mean amplitude recorded in the neighborhood of natural watercourses was about 50 cm, when in the areas impacted by controlled outflow as well as artificial water damming it ranged from 75 to 100 cm.

9

Porownanie sposobu zywienia sluchaczek medycznych szkol zawodowych w latach 1985-86 i 1995-96

61%

Szewczynski J. , Ostrowska A.

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tom 32

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nr 4

403-408

PL

Dokonano oceny wahań sezonowych w sposobie odżywiania się badanej populacji na podstawie analizy jakościowej i ilościowej żywienia. Stwierdzono, że w okresie po urynkowieniu gospodarki żywnościowej zmienność sezonowa spożycia żywności ulegała niwelacji.

EN

The aim of the study was to compare the seasonal variability in food consumption in 1985/86 and 1995/96 years - the periods before and after marketisation of food economy in Poland. The investigation was conducted in I semester (September-January) and II semester (February-May) of academic year. In 1985/86 diets of 312 female students were examined using 24-hour recall in 1995/96 - 246 ones. The seasonal variability in food consumption was observed only in 1985/86 year. Intake of vegetables and fruit was less in II semester and level of retinol and vitamin C in diets was lower compared with I semester (p < 0,05). Any differences in intake of products and nutrients between semester I and II were found in 1995/96 year. The results indicate that seasonal variability in food consumption among examined students was reduced in conditions of marketisation of food economy in Poland.