Results 41 to 50 of about 48,023 (185)

Teor de clorofila em folhas de capim Marandu em sistema silvipastoril. [PDF]

open access: yes, 2018
A clorofila é a principal responsável pela captação da energia luminosa, a sua falta restringe a capacidade de absorção da energia e a possibilidade de acúmulo de forragem. Desta forma, esse trabalho tem por objetivo avaliar o teor de clorofila em folhas
CARNEVALLI, R. A.   +6 more
core  

Neutralização da toxina tetânica pela clorofila hidrossolúvel

open access: yesRevista 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   +1 more
openaire   +2 more sources

Efeito de doses de nitrogênio sobre os teores de clorofila e nitrogênio foliar na pereira, cv. Princesinha, cultivada no Vale do São Francisco. [PDF]

open access: yes, 2013
O objetivo desse trabalho foi avaliar os índices de clorofila total, clorofila A e clorofila B e teor de N foliar em pereiras da cultivar Princesinha, cultivada sob condições irrigadas no Semiárido ...
DEON, M. D. I.   +2 more
core  

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

open access: yesWorld 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   +6 more
wiley   +1 more source

Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity [PDF]

open access: yes, 2012
The zooplankton of lakes is controlled by biological and physico-chemical parameters. Among the former, predation by fish can determine the replacement of large-sized species by small-sized ones and among the latter, salinity exerts negative effects on ...
Cabrera, Gabriela Cecilia   +3 more
core  

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

open access: yesEcological 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   +4 more
wiley   +1 more source

Ácido fólico (vitamina B9) y crecimiento de Phaseolus vulgaris L. micorrizado (Fabaceae)

open access: yesTerra Latinoamericana
El ácido fólico (vitamina B9) juega un papel crucial en la síntesis de clorofila y su aplicación exógena a las plantas podría influir positivamente en el índice de verdes obscuros (DGCI) y crecimiento vegetal.
Jacob Banuelos   +3 more
doaj   +1 more source

Calibração do medidor de clorofila Minolta SPAD-502 para avaliação do conteúdo de nitrogênio do milho. [PDF]

open access: yes, 2011
O objetivo deste trabalho foi calibrar o medidor de clorofila Minolta SPAD-502 para avaliação da nutrição nitrogenada das plantas de milho, baseando-se na prévia comparação das leituras de clorofila com os teores obtidos pelos extratores N,N ...
ALVES, B. J. R.   +6 more
core  

DIFFERENCES IN LEAF GAS EXCHANGE AND LEAF CHARACTERISTICS BETWEEN TWO ALMOND CULTIVARS [PDF]

open access: yesFruit Growing Research, 2013
Leaf chlorophyll content, specific leaf weight (SLW), photosynthetic and transpiration rates, stomatal functioning, water use efficiency and quantum yield were assessed during the kernel filling period for two consecutive years in order to understand ...
George D. Nanos   +3 more
doaj  

Metabolitos secundarios y clorofilas en cempasúchil en respuesta a estrés salino

open access: yesRevista Mexicana de Ciencias Agrícolas, 2018
Factores de estrés bióticos y abióticos tienen inf luencia en la biosíntesis de metabolitos secundarios en algunas especies medicinales. En este sentido, se ha reportado que el estrés salino altera las propiedades bioquímicas de un gran número de cultivos.
Ma. Guadalupe Peralta-Sánchez   +5 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy