Results 31 to 40 of about 287,123 (361)

Caspian Sea is eutrophying: the alarming message of satellite data

open access: yesEnvironmental Research Letters, 2020
The competition over extracting the energy resources of the Caspian Sea together with the major anthropogenic changes in the coastal zones have resulted in increased pollution and environmental degradation of the sea.
Anahita Modabberi   +6 more
doaj   +1 more source

Investigating Changes in Chlorophyll a and Other Water Chemistry Variables in Response to Global Environmental Change [PDF]

open access: yes, 2020
Changes in water quality are influenced by climate change and other anthropogenic stressors. We 1) assessed changes in water quality in lakes in the Laurentian Great Lakes region, and 2) compiled water quality data for lakes across the world to assess ...
Mahdiyan, Octavia
core  

Indirect method for quantifying the content of photosynthetic pigments in genotypes of dwarf elephant grass - doi: 10.4025/actascianimsci.v35i1.15178

open access: yesActa Scientiarum: Animal Sciences, 2012
Equations that indirectly associate the rates obtained by chlorophyll meter SPAD-502 to chlorophyll and carotenoids rates of dwarf elephant grass genotype are provided. Leaves of the genotype of dwarf elephant grass were employed.
Saulo Alberto do Carmo Araújo   +5 more
doaj   +1 more source

From chlorophyll a towards bacteriochlorophyll a: Excited-state processes of modified pigments [PDF]

open access: yes, 1994
By means of fluorescence spectroscopy and nonlinear absorption experiments, excited-state processes of the modified pigments [3-acetyl]-chlorophyll a, [31-OH]-bacteriochlorophyll a and [3-vinyl]-bacteriochlorophyll a were investigated and compared with ...
Katheder, Ingrid   +4 more
core   +1 more source

Study some of Garden Cress (Lepidium sativum L.) Physiological Traits at Levels of Irrigation and Ascorbic Acid [PDF]

open access: yesIkufīziyuluzhī-i Giyāhān-i Zirā̒ī, 2017
Drought seriously reduces the quality and quantity of agronomic and horticultural plants. In such condition, using factors to reduce these effects on plants is indispensible. To evaluate the effect of water stress and different levels of ascorbic acid on
Zohre Akbari   +3 more
doaj  

Nitrogen uptake and the importance of internal nitrogen loading in Lake Balaton [PDF]

open access: yes, 2001
1. The importance of various forms of nitrogen to the nitrogen supply of phytoplankton has been investigated in the mesotrophic eastern and eutrophic western basin of Lake Balaton.<br /> 2.
Herodek, S.   +3 more
core   +1 more source

Photosynthetic responses of heat-stressed apple leaves to foliar application of salicylic and ascorbic acid

open access: yesPhotosynthetica
High temperatures have significant impacts on fruit tree production. Foliar spraying application of promoting agents can be a sustainable approach to managing high-temperature stress in orchards.
I. MIHALJEVIĆ   +4 more
doaj   +1 more source

Chlorophyll-a concentrations in 82 large alpine lakes on the Tibetan Plateau during 2003–2017: temporal–spatial variations and influencing factors

open access: yesInternational Journal of Digital Earth, 2021
As essential parts of the unique ecosystem of Tibetan Plateau (TP), the sizes and associated physical properties of alpine lakes have long been investigated. However, little is known about one of the most critical biogeochemical properties, i.e.
Xuehui Pi   +8 more
doaj   +1 more source

The Impact of Typhoon “In-Fa” (2021) on Temperature, Salinity, and Chlorophyll-a Concentration in the Upwelling Area of Northwestern East China Sea

open access: yesAtmosphere, 2023
Severe typhoon “In-Fa” passed through the northwestern region of East China Sea (ECS) in July 2021, affecting oceanic variables such as seawater temperature, salinity, and chlorophyll-a (Chl-a) concentration over the upwelling area.
Yingliang Che   +4 more
doaj   +1 more source

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