Results 21 to 30 of about 1,403 (131)

ÍNDICE SPAD COMO ESTIMATIVA INDIRETA DO CONTEÚDO DE CLOROFILA EM PLANTAS DE QUIABO

Revista de Agricultura Neotropical, 2022
A clorofila, molécula responsável pela atividade fotossintética das plantas, pode ser quantificada por métodos diretos e indiretos. O objetivo do estudo foi relacionar os resultados do conteúdo de clorofila obtidos por diferentes métodos de determinação
Vinicius Villa e Vila, Gustavo Soares Wenneck , Daniele de Souza Terassi, Roberto Rezende, Reni Saath   +4 more
doaj   +1 more source

Primary productivity of the phytoplankton in a tropical Brazilian shallow lake: experiments in the lake and in mesocosms Produtividade primária em um lago tropical raso brasileiro: experimentos no lago e em mesocosmos

Acta Limnologica Brasiliensia, 2010
AIM: To evaluate the primary productivity of the phytoplankton in the Lake Monte Alegre, southeastern Brazil, and the factors that influence its fluctuations, experiments were carried out in the lake and in mesocosm; METHODS: Primary productivity rates ...
Eliana Garcia Feresin, Marlene Sofia Arcifa, Lúcia Helena Sampaio da Silva, André Luiz Henríques Esguícero   +3 more
doaj   +1 more source

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

New Phytologist, EarlyView.
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Pablo Almela, Scott Hotaling, J. Joseph Giersch, Helena C. L. Klip, James J. Elser, Trinity L. Hamilton   +5 more
wiley   +1 more source

VARIABILIDAD INTERANUAL DE CLOROFILA EN EL GOLFO DE CALIFORNIA

Ecología Aplicada, 2007
El Golfo de California es caracterizado como un mar semicerrado y una cuenca de evaporacion. Se ha divido en varias zonas fisicas y biogeograficas, caracteristicas dadas por la dinamica de cada zona. El objetivo de este trabajo fue el de conocer la variabilidad interanual de la clorofila de Septiembre de 1997 a Diciembre de 2002 bajo condiciones El ...
T. Leticia Espinosa-Carreón, J. Eduardo Valdez-Holguín   +1 more
openaire   +4 more sources

Fitoplancton de la zona litoral del departamento del Atlántico, Colombia

Intropica, 2022
Las comunidades biológicas están conformadas por grupos taxonómicos, donde el fitoplancton, como productor primario, tiene una relevancia ecológica: sirve para comprender la estructura y el funcionamiento de un ecosistema y la manera en la que los ...
Ana C. De la Parra-Guerra, Carlos García-Alzate, Luis C. Gutiérrez-Moreno (†)   +2 more
doaj  

Teor de nitrogênio, clorofila e relação clorofila-carotenoide em café arábica em solo submetido a diferentes corretivos de acidez

Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences, 2013
Resumen pt: Alguns residuos industriais possuem potencial de utilizacao para a correcao da acidez do solo, como a escoria e o oxido de magnesio; no entanto, os proce...
N.O. Nogueira, L.D. Martins, M.A. Tomaz, F.V. Andrade, R.R. Passos   +4 more
openaire   +1 more source

Assessing Closed Hydroponic Subsystems for Batavia Lettuce Growth Under Different Planting Densities

World Water Policy, Volume 11, Issue 2, Page 427-438, May 2025.
ABSTRACT Hydroponic systems have the potential to be sustainable and alternative methods for food production that confer advantages of high production and better control of growth. However, only a few studies have focused on leafy vegetable growth in different subsystems and environmental variables.
Demet Çekin, Hamis El‐Gabry, Ricarda Lothmann, Nayira Hassan, Mariam Hassanen, Mostafa Hassanen, Hani Sewilam   +6 more
wiley   +1 more source

Neutralização da toxina tetânica pela clorofila hidrossolúvel

Revista da Faculdade de Medicina Veterinária, Universidade de São Paulo, 1950
Confirming the studies of F onseca R ibeiro and Guimaraes, the authors showed besides that with a contact for 15 minutes, 0.5 ml. of hydro-soluble chlorophyll at 1% neutralizes 500 M.L.D. of tetanic toxine; that 100 ml. of tetanic toxine (concentration of 1 ml. = 15,000 M.L.D. guinea pigs) in contact with 1,0 g.
Fonseca Ribeiro, Paulo Maria Gonzaga de Lacerda Jr.   +1 more
openaire   +2 more sources

Hurricane‐induced changes in mayfly assemblage structure, production and emergence in a tropical island stream Cambios inducidos por los huracanes en la estructura, producción, y emergencia del ensamblaje de Ephemeroptera de una quebrada de isla tropical

Ecological Entomology, Volume 50, Issue 1, Page 201-213, February 2025.
Hurricanes create major disturbances to stream ecosystems by producing large floods and removing riparian vegetation. Understanding their impacts is a priority, as hurricane intensity will increase with global climate change. Hurricane disturbance shifts mayfly assemblages from dominance by Leptophlebiidae before to Baetidae after.
Alonso Ramírez, Ana M. Meza‐Salazar, Jesús E. Gómez, Pablo E. Gutiérrez‐Fonseca, José Sánchez‐Ruiz   +4 more
wiley   +1 more source

Ciclo anual de la clorofila-α satelital en el archipiélago de Juan Fernández (33°S), Chile Annual cycle of the satellite chlorophyll-a in the Juan Fernandez archipelago (33°S), Chile

Latin American Journal of Aquatic Research, 2012
La variabilidad espacial y temporal del ciclo anual de la clorofila-α en el archipiélago de Juan Fernández se analiza usando ocho anos de datos satelitales de clorofila-α, viento, corrientes y nivel del mar.
Isabel Andrade, Samuel E Hormazabal, Marco A Correa-Ramirez   +2 more
doaj