chlorophyll a/atrophy

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Spatio-temporal patterns of Ulva prolifera blooms and the corresponding influence on chlorophyll-a concentration in the Southern Yellow Sea, China.

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The world's largest macroalgal blooms (MABs) caused by the Ulva prolifera outbreaks have occurred every summer since 2007 in the Southern Yellow Sea, China. Accumulating evidence showed that MABs may deteriorate the regional marine environment and influence the growth of some primary producers such

Photoinduced Intra- and Intermolecular Energy Transfer in Chlorophyll a Dimer.

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Applying nonadiabatic excited-state molecular dynamics, we investigate excitation energy transfer and exciton localization dynamics in a chlorophyll a (Chla) dimer system at the interface of two monomers of light-harvesting complex II trimer. After its optical excitation at the red edge of the Soret

Type I and type II genes for the chlorophyll a/b-binding protein in the gymnosperm Pinus sylvestris (Scots pine): cDNA cloning and sequence analysis.

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A cDNA library was constructed from mRNA prepared from light-treated seedlings of Scots pine (Pinus sylvestris L.) and cDNAs for the chlorophyll a/b-binding protein LHC-II were identified using a pea gene as the heterologous probe. Three cDNA clones were sequenced. The deduced amino acid sequences

Photostabilized chlorophyll a in mesoporous silica: adsorption properties and photoreduction activity of chlorophyll a.

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Chlorophyll a was adsorbed to mesoporous silica (FSM, folded-sheet mesoporous material) to form a chlorophyll-FSM conjugate, in which a nanometer-scale interaction between chlorophyll a molecules resembles a living plant leaf. The mesopores of FSM acted as nanoscale spaces not only for an

Watershed export of fine sediment, organic carbon, and chlorophyll-a to Chesapeake Bay: Spatial and temporal patterns in 1984-2016.

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Chesapeake Bay has long experienced nutrient enrichment and water clarity deterioration. This study provides new quantification of loads and yields for sediment (fine and coarse grained), organic carbon (total, dissolved, and particulate), and chlorophyll-a from the monitored nontidal Chesapeake Bay

Identification of a gene encoding the light-harvesting chlorophyll a/b proteins of photosystem I in green alga Dunaliella salina.

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There are four LhcII genes of Dunaliella salina have been submitted to the database of GenBank. However, little is known about Lhca genes of this green alga, although this knowledge might be available to study the composition and phylogenesis of Lhc gene family. Recently, one Lhca gene was been

Effect of core-shell copper oxide nanoparticles on cell culture morphology and photosynthesis (photosystem II energy distribution) in the green alga, Chlamydomonas reinhardtii.

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The effect of core-shell copper oxide nanoparticles with sizes smaller than 100 nm on cellular systems is still not well understood. Documenting these effects is pressing since core-shell copper oxide nanoparticles are currently components of pigments used frequently as antifouling paint protecting

Production and uptake of dissolved carbon, nitrogen, and phosphorus in overlying water of aquaculture shrimp ponds in subtropical estuaries, China.

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Water quality deterioration can adversely affect the long-term sustainability of aquaculture industry. Understanding the processes of nutrient regeneration and uptake is important for improving water quality and the overall ecosystem health of aquaculture system. In spite of the importance of

Effects of temperature-control curtain on algae biomass and dissolved oxygen in a large stratified reservoir: Sanbanxi Reservoir case study.

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A temperature-control curtain (TCC) is a new technique of selective withdrawal for controlling the outflow temperature of a reservoir. A TCC can significantly affect the reservoir hydrodynamic and thermal structure, but its effects on water quality and ecology remain unknown. In this study, we

Luminescence spectroscopic observation of singlet oxygen formation in extra virgin olive oil as affected by irradiation light wavelengths, 1,4-diazabicyclo[2.2.2]octane, irradiation time, and oxygen bubbling.

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A spectrofluorometer equipped with a highly sensitive near-IR InGaAs detector was used for the direct visualization of singlet oxygen emission at 1268 nm in olive oil during light irradiation with various different wavelengths. The virgin olive oil in methylene chloride (20% w/v, oxygen saturated)

Mapping spatio-temporal dynamics of main water parameters and understanding their relationships with driving factors using GF-1 images in a clear reservoir

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Due to eutrophication and water quality deterioration in clear reservoirs, it is necessary to monitor and manage the main water parameters: concentration of total phosphorus (C_TP), chemical oxygen demand (C_COD), chlorophyll-a (C_Chla), total suspended matter

Catastrophic effects of sand mining on macroinvertebrates in a large shallow lake with implications for management.

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Sand mining is a human activity that is increasing in inland waters and has profound effects on entire aquatic ecosystems. However, current knowledge of the effects of sand mining on freshwater lake ecosystems remains limited, especially for biotic communities. Here, we investigated the responses of

Ecophysiological responses to different forest patch type of two codominant tree seedlings.

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According to gap-phase dynamics theory, forests can be divided into four distinct patch types: gap patch (G), building patch (B), mature patch (M), and degeneration patch (D). Varying light conditions across patch types are one of the most important factors affecting the coexistence of vegetation.

Warming Affects Crustacean Grazing Pressure on Phytoplankton by Altering the Vertical Distribution in a Stratified Lake

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Zooplankton could efficiently graze algae and thus improve water quality. However, as thermal stratification commonly occurs in deep lakes, the effect of warming on the trophic interactions of plankton in depth profiles is still not clear. To explore the pressure of crustacean grazing on

Direct and indirect effects of the glyphosate formulation Glifosato Atanor® on freshwater microbial communities.

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Glyphosate-based formulations are among the most widely used herbicides in the world. The effect of the formulation Glifosato Atanor(®) on freshwater microbial communities (phytoplankton, bacterioplankton, periphyton and zooplankton) was assessed through a manipulative experiment using six small

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