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Effect of ship shadow on in-water irradiance measurements

100%

Piskozub J.

Oceanologia

|

2004

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tom 46

|

nr 1

Calculations of the effect of the ship’s shadow on in-water irradiance measurement errors were performed with a Monte Carlo radiance transfer algorithm. The algorithm contained the Cox-Munk wave-slope probability function. A simple 3-D model of the rectangular underwater part of a ship was used. The effect was calculated as a function of sea-water absorption, surface roughness (depending on an assumed wind velocity of up to 15 m s−1) with various wind velocities and directions, length and depth of the ship, distance of instrument from the ship, and bow-to-sun angle.

2

The effect of irradiance, p-chloromercuribenzenesulphonic acid and fusicoccin on the long distance transport in Zea mays L. seedlings

100%

Sowinski P.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 1

The system consisting of a few proportional detectors with appropriate electronic components was earlier developed for in vivo studies of long distance transport in whole maize seedlings. ¹⁴CO₂ assimilation rate (Pa), time of radioactivity appearing in the loading region (AT), transport speed in the leaf (TSl), transport speed between the leaf and the roots (TSr), the maximum radioactivity values detected in the leaf below the feeding area (Rl) and in the mesocotyl (Rr) from leaves to roots in maize seedlings were calculated from the obtained temporal profiles of radioactivity. The study was undertaken to follow the changes in separate steps of long distance transport in maize seedlings as affected by two light irradiances and application of p-chloromercuribenzenesulphonic acid and fusicoccin, with the aim to investigate different steps of long distance transport, particularly phloem loading. The method used allows to study in vivo the different aspects of long distance transport in maize seedlings, both qualitatively and quantitatively. It was shown that the characteristics obtained from the radioactivity profiles corresponded to different steps of long distance transport, as assimilate synthesis, phloem loading, and phloem translocation. It was also demonstrated that although active phloem loading participate in assimilate export from the leaves, assimilate transport along the maize seedling might undergo accordingly to assimilate gradient, particularly under light irradiance higher than during the growth.

3

Development of pepino [Solanum muricatum Aiton] in different light integrals

100%

Kowalczyk K., Kobryn J.

Folia Horticulturae

|

2003

|

tom 15

|

nr 1

4

Maximum effects of sunlight focusing under a wind-disturbed sea surface

86%

Dera J., Stramski D.

Oceanologia

|

1986

|

tom 23

5

The basis optical properties of the water in the Ezcurra Inlet

86%

Olszewski J.

Oceanologia

|

1983

|

tom 15

6

The aerosol optical thickness of the atmosphere over the Norwegian Sea obtained from different experimental data

86%

Kusmierczyk-Michulec J.

Oceanologia

|

1993

|

tom 34

7

Inverse methods in hydrologic optics

86%

Gordon H. R.

Oceanologia

|

2002

|

tom 44

|

nr 1

Methods for solving the hydrologic-optics inverse problem, i.e., estimating the inherent optical properties of a water body based solely on measurements of the apparent optical properties, are reviewed in detail. A new method is developed for the inverse problem in water bodies in which fluorescence is important. It is shown that in principle, given profiles of the spectra of up- and downwelling irradiance, estimation of the coefficient of inelastic scattering from any wave band to any other wave band can be effected.

8

Uncertainty in estimating mean solar radiation fluxes at the Baltic surface from irregular ship-borne meteorological observations

86%

Rozwadowska A.

Oceanologia

|

1999

|

tom 41

|

nr 1

9

Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters

86%

Pelevin V. N., Rostovtseva V. V.

Oceanologia

|

2001

|

tom 43

|

nr 4

A method for estimating the water backscattering coefficient was put forward on the basis of experimental data of diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance. Calculations were carried out for open sea waters of different types and the spectral dependencies were found (‘anomalous’ spectra) and explained. On this basis, a new model of light backscattering on particles in the sea is proposed. This model may be useful for modelling remote sensing reflectance spectra in order to solve the inverse problems of estimating the concentration of natural admixtures in shelf waters.

10

Aggregation of LS Rubisco in response to exposure of plants to low irradiance

72%

Grabsztunowicz M., Jackowski G.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

11

The effect of irradiance on the xanthophyll composition of Skeletonema marinoi (Bacillariophycae), Teleaulax sp., Rhodomonas sp. (Cryptophyceae), and Heterocapsa triquetra (Dinophyceae)

72%

Lotocka M.

Oceanological and Hydrobiological Studies

|

2015

|

tom 44

|

nr 2

12

Optical water types of the Nordic Seas and adjacent areas

72%

Aas E., Hojerslev N. K., Hokedal J., Sorensen K.

Oceanologia

|

2013

|

tom 55

|

nr 2

13

The inflow of solar energy and the irradiance of the euphotic zone in the region of Ezcurra Inlet during the Antarctic summer of 1977/78

72%

Wozniak B., Hapter R., Maj B.

Oceanologia

|

1983

|

tom 15

14

The effect of the light colour on the growth and flowering of narcissi under long-dey and high quantum irradiance conditions

72%

Wozny A., Zalewska M.

Electronic Journal of Polish Agricultural Universities. Series: Horticulture

|

2008

|

tom 11

|

nr 2

15

Finding the aerosol optical thickness over the Baltic Sea - comparison of two methods

72%

Rozwadowska A., Kusmierczyk-Michulec J.

Oceanologia

|

1998

|

tom 40

|

nr 3

16

Dependence of the photosynthesis quantum yield in oceans on environmental factors

72%

Wozniak B., Dera J., Ficek D., Ostrowska M., Majchrowski R.

Oceanologia

|

2002

|

tom 44

|

nr 4

Statistical relationships between the quantum yield of photosynthesis and selected environmental factors in the ocean have been studied. The underwater irradiance, nutrient content, water temperature and water trophicity (i.e. the surface concentration of chlorophyll Ca(0)) have been considered, utilizing a large empirical data base. On the basis of these relationships, a mathematical model of the quantum yield was worked out in which the quantum yield Φ is expressed as a product of the theoretical maximum quantum yield ΦMAX = 0.125 atomC quanta−1 and six dimensionless factors. Each of these factors fi appears to be, to a sufficiently good approximation, dependent on one or two environmental factors and optical depth at most. The model makes it possible to determine the quantum yield from known values of these environmental factors. Empirical verification of the model yielded a positive result – the statistical error of the approximate values of the quantum yield Φ is 42%.

17

Solar radiation fluxes at the surface of the Baltic Proper. Part 1. Mean annual cycle and influencing factors

72%

Rozwadowska A., Isemer H. J.

Oceanologia

|

1998

|

tom 40

|

nr 4

18

Focusing of sunlight by sea surface waves : new results from the Black Sea

72%

Dera J., Sagan S., Stramski D.

Oceanologia

|

1993

|

tom 34

19

The after-effects of temperature and irradiance during early growth of winter oilseed rape [Brassica napus L.var.oleifera, cv.Gorczanski] seedlings on the progress of their cold acclimation

72%

Rapacz M.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 1

Experiments performed under controlled conditions showed that level of PPFD (photosynthetic photon flux density) during early seedlings growth (preceding cold acclimation at +2 °C) was not the key factor for the development of frost resistance. It did not modify the beneficial effects of prehardening (Rapacz 1997, in this issue) at moderately low (+12 °C) day temperature. Now I have shown that the increase of PPFD may replace to some extent prehardening in the development of frost resistance. It was particularly seen in non-prehardened plants, which had been grown under warm-day (+20 °C) conditions. Prehardening performed under controlled conditions, as well as seedlings growth under natural autumn conditions in the field, allowed to maintain a high net-photosynthesis rate at chilling temperatures. A net-photosynthesis rate during cold acclimation at +2 °C corresponded well with higher frost resistance. As a result, seedlings non subjected to prehardening and grown before cold acclimation under low PPFD acclimated better, if the cold treatment was applied only at nights (+20/2 °C day/night). Only under such conditions the photosynthetic rate was sufficiently high to allow plants to reach a higher level of frost resistance. All other plants acclimated better when they were exposed to the hardening temperature continuously during days and nights (+2/2 °C day/night).

20

Seed germination and emergence of Eragrostis tenuifolia (A. Rich.) Hochst. ex Steud. in response to environmental factors

58%

Bittencourt H. H., da Silva Bonome L. T., de Bortoli Pagnoncelli,Jr F., Lana M. A., Muzell Trezzi M.

Journal of Plant Protection Research

|

2016

|

tom 56

|

nr 1

Eragrostis tenuifolia is a weed species that is gaining ground in Brazil. This weed occurs in pastures, grasslands, crop fields, and roadsides. The objective of this study was to examine the effects of different environmental factors on E. tenuifolia seed germination and seedling emergence. The optimum constant temperature for germination was around 35–30°C. It was also found that 85% of seeds germinated under a 30/20°C alternate temperature regime. Light appears to have a positive effect on seed germination. No seedlings emerged when seeds were buried 3 cm or deeper. The results suggested that E. tenuifolia has the potential to spread into pastures and in no-tillage crop systems in Brazil. Measures such as the use of cover crops and/or soil cultivation can be used to limit germination and seedling emergence, respectively.

Ograniczanie wyników

Effect of ship shadow on in-water irradiance measurements

The effect of irradiance, p-chloromercuribenzenesulphonic acid and fusicoccin on the long distance transport in Zea mays L. seedlings

Development of pepino [Solanum muricatum Aiton] in different light integrals

Maximum effects of sunlight focusing under a wind-disturbed sea surface

The basis optical properties of the water in the Ezcurra Inlet

The aerosol optical thickness of the atmosphere over the Norwegian Sea obtained from different experimental data

Inverse methods in hydrologic optics

Uncertainty in estimating mean solar radiation fluxes at the Baltic surface from irregular ship-borne meteorological observations

Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters

Aggregation of LS Rubisco in response to exposure of plants to low irradiance

The effect of irradiance on the xanthophyll composition of Skeletonema marinoi (Bacillariophycae), Teleaulax sp., Rhodomonas sp. (Cryptophyceae), and Heterocapsa triquetra (Dinophyceae)

Optical water types of the Nordic Seas and adjacent areas

The inflow of solar energy and the irradiance of the euphotic zone in the region of Ezcurra Inlet during the Antarctic summer of 1977/78

The effect of the light colour on the growth and flowering of narcissi under long-dey and high quantum irradiance conditions

Finding the aerosol optical thickness over the Baltic Sea - comparison of two methods

Dependence of the photosynthesis quantum yield in oceans on environmental factors

Solar radiation fluxes at the surface of the Baltic Proper. Part 1. Mean annual cycle and influencing factors

Focusing of sunlight by sea surface waves : new results from the Black Sea

The after-effects of temperature and irradiance during early growth of winter oilseed rape [Brassica napus L.var.oleifera, cv.Gorczanski] seedlings on the progress of their cold acclimation

Seed germination and emergence of Eragrostis tenuifolia (A. Rich.) Hochst. ex Steud. in response to environmental factors