Results 11 to 20 of about 402,938 (213)

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   +5 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

Relationship Between Physiological Characteristic and Bean Quality on Some Cocoa Clones (Theobroma Cacao L.) [PDF]

open access: yes, 2015
Photosynthesis is one of the physiological process that influence the bean weight and this process related with the efectiveness of the stomata character and chlorophyll content in the leaves.
Sari, I. A. (Indah)   +2 more
core   +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

REACTIVITY OF CHLOROPHYLL a/b-PROTEINS AND MICELLAR TRITON X-100 COMPLEXES OF CHLOROPHYLLS a OR b WITH BOROHYDRIDE [PDF]

open access: yes, 1989
The reaction of several plant chlorophyll-protein complexes with NaBH4 has been studied by absorption spectroscopy. In all the complexes studied, chlorophyll b is more reactive than Chi a, due to preferential reaction of its formyl substituent at C-7 ...
Arnon D. I.   +15 more
core   +1 more source

Underwater optical wireless communications : depth dependent variations in attenuation [PDF]

open access: yes, 2013
Depth variations in the attenuation coefficient for light in the ocean were calculated using a one-parameter model based on the chlorophyll-a concentration Cc and experimentally-determined Gaussian chlorophyll-depth profiles.
Green, Roger   +2 more
core   +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

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
Abraham R. J.   +27 more
core   +1 more source

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