Results 21 to 30 of about 118,702,901 (260)

Influence of alcoholic extracts from Helianthus annnus L. roots on the photosynthetic activity of Sinapis alba L. cv. Barka plants

open access: yesActa Agriculturae Scandinavica. Section B, Soil and Plant Science, 2020
Allelopathy substances stimulate or inhibit seed germination, growth and development of plant species living in their neighbouring, or occupying the same place directly after them.
Joanna Puła   +5 more
doaj   +1 more source

Identifying Oceanic Responses with Validated Satellite Observations after the Passage of Typhoons in the Northern South China Sea

open access: yesRemote Sensing, 2022
Tropical cyclone-induced upwelling has an important influence on ocean temperature and chlorophyll-a (Chl-a) concentrations, which are modified by the existence of mesoscale eddies. This paper investigates the regional dynamics and associated variability
Weifang Jin   +7 more
doaj   +1 more source

Validation and application of the MERIS Terrestrial Chlorophyll Index. [PDF]

open access: yes
Climate is one of the key variables driving ecosystems at local to global scales. How and to what extent vegetation responds to climate variability is a challenging topic for global change analysis.
Almond, Samuel Francis
core   +5 more sources

Estudo das diferentes formas de fósforo nas águas da plataforma continental do Amazonas Study of different forms of phosphorus in the Amazon continental shelf waters

open access: yesQuímica Nova, 2007
Hydrological samples were collected on the continental shelf of the Amazon river to determine particulate organic and inorganic matter, dissolved organic phosphorus (DOP), phosphate, total particulate phosphorus (TPP), chlorophyll a, temperature ...
Maria de Lourdes Souza Santos   +3 more
doaj   +1 more source

Variability in the Sea Surface Temperature Gradient and Its Impacts on Chlorophyll-a Concentration in the Kuroshio Extension

open access: yesRemote Sensing, 2021
Sixteen years of satellite observational data in the Northwestern Pacific Ocean are used to describe the variability in the sea surface temperature (SST) gradient and its impact on chlorophyll-a concentrations (Chl-a).
Yuntao Wang, Rui Tang, Yi Yu, Fei Ji
doaj   +1 more source

Relationship between chlorophyll a pigment and algal geometric biovolume determination in a floodplain lake (Ciénaga Ayapel, Córdoba-Colombia)

open access: yesRevista Facultad de Ingeniería Universidad de Antioquia, 2012
The estimation of biomass of planktonic algae can be done by two methods, the quantification of geometric biovolume and chlorophyll a. This work which considers as environmental scenario the Ayapel-Cordoba flood-plain lake, introduces (presents) the two
Esnedy Hernández   +2 more
doaj   +1 more source

The Symbiodiniaceae and Bacterial Dynamic Composition of the Coral Echinopora gemmacea on Wuzhizhou Island

open access: yesJournal of Marine Science and Engineering, 2023
Coral’s susceptibility to bleaching is determined by the strength of the intricate mutual relationships among coral symbionts. However, there is limited knowledge about how the symbiotic members of the scleractinian coral Echinopora gemmacea respond to ...
Zhuoran Li   +6 more
doaj   +1 more source

The derivation of the formyl-group oxygen of chlorophyll b in higher plants from molecular oxygen. [PDF]

open access: yes, 1994
The mechanism of formation of the formyl group of chlorophyll b has long been obscure but, in this paper, the origin of the 7-formyl-group oxygen of chlorophyll b in higher plants was determined by greening etiolated maize leaves, excised from dark-grown
Edmund CMIEL   +9 more
core   +1 more source

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

Cloning and characterisation of chlorophyll synthase from Avena sativa [PDF]

open access: yes, 2001
The chlorophyll synthase gene from oat (Avena sativa) was cloned and expressed in Escherichia coli. The deduced amino acid sequence consists of 378 amino acids including a presequence, of 46 amino acids.
Kögel, Julia   +4 more
core   +1 more source

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