Results 21 to 30 of about 169,159 (312)

Chlorophyll fluorescence—a practical guide [PDF]

open access: yesJournal of Experimental Botany, 2000
Chlorophyll fluorescence analysis has become one of the most powerful and widely used techniques available to plant physiologists and ecophysiologists. This review aims to provide an introduction for the novice into the methodology and applications of chlorophyll fluorescence. After a brief introduction into the theoretical background of the technique,
Maxwell, Kate, Johnson, Giles N.
openaire   +3 more sources

Chlorophyll b to Chlorophyll a Conversion Precedes Chlorophyll Degradation in Hordeum vulgare L. [PDF]

open access: yesJournal of Biological Chemistry, 1999
This study reveals by in vivo deuterium labeling that in higher plants chlorophyll (Chl) b is converted to Chl a before degradation. For this purpose, de-greening of excised green primary leaves of barley (Hordeum vulgare) was induced by permanent darkness in the presence of heavy water (80 atom % (2)H).
P, Folly, N, Engel
openaire   +2 more sources

Chlorophyll a spatial inference using artificial neural network from multispectral images and in situ measurements [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2013
Considering the importance of monitoring the water quality parameters, remote sensing is a practicable alternative to limnological variables detection, which interacts with electromagnetic radiation, called optically active components (OAC). Among these,
MONIQUE S. FERREIRA   +1 more
doaj   +3 more sources

A Study on the effects of Monsoon phenomenon on physicochemical parameters, nutrients and Chl. a in Chabahar Bay [PDF]

open access: yesعلوم محیطی, 2021
Introduction: Chabahar Bay is a semi-enclosed marine environment in the southeastern coast of Iran, withtwo important ports i.e., Konarak and Chabahar in its margins.
Hamid Ershadifar   +4 more
doaj   +1 more source

Mesoscale variability of the Mexican Tropical Pacific using TOPEX and SeaWiFS data

open access: yesCiencias Marinas, 2006
The Mexican Tropical Pacific has oligotrophic characteristics; however, it sustains an abundant biodiversity, mainly because of upwelling promoted by its relatively shallow thermocline, strong winds and mesoscale eddies.
J López-Calderón   +5 more
doaj   +1 more source

Extracts of Ulva lactuca Induce Responses against Penicillium digitatum on Oranges

open access: yesPhycology, 2023
Penicillium digitatum causes severe damage to postharvest and stored citrus fruits, making it necessary to seek acceptable solutions limiting environmental and sanitary impacts.
Douaa Salim   +4 more
doaj   +1 more source

Remote Sensing Inversion of Typical Offshore Water Quality Parameter Concentration Based on Improved SVR Algorithm

open access: yesRemote Sensing, 2023
Chlorophyll a concentration and suspended matter concentration, as typical water quality parameters related to spectral characteristics, are essential for characterizing the degree of eutrophication in water bodies.
Jianghua Ren   +8 more
doaj   +1 more source

Effects of tetracycline on growth and antioxidant system of Selenastrum capricornutum

open access: yesJournal of Hebei University of Science and Technology, 2019
In order to study the toxic effects of tetracycline on algae, Selenastrum capricornutum is selected as the test organism. The growing situation, chlorophyll a contents, superoxide dismutase (SOD) activity, malondialdehyde (MDA) content and reactive ...
Yaxue WANG, Pengpeng WU, Hongyan SHEN
doaj   +1 more source

Role of physical forcings and nutrient availability on the control of satellite-based chlorophyll a concentration in the coastal upwelling area of the Sicilian Channel

open access: yesScientia Marina, 2010
The northern sector of the Sicilian Channel is an area of favourable upwelling winds, which ought to support primary production. However, the values for primary production are low when compared with other Mediterranean areas and very low compared with ...
Bernardo Patti   +5 more
doaj   +1 more source

Investigation of Chlorophyl-a Derived Compounds as Photosensitizer for Photodynamic Inactivation

open access: yesBulletin of Chemical Reaction Engineering & Catalysis, 2021
Chlorophyll has unique physicochemical properties which makes them good as photosensitizer of Photodynamic Inactivation (PDI). The physicochemical properties of chlorophyll as photosensitizer can be optimized through several routes.
Listiana Oktavia   +2 more
doaj   +1 more source

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