Results 81 to 90 of about 541 (161)

Anatomia foliar comparativa em espécies de guanxuma Comparative leaf anatomy of guanxuma species

open access: yesPlanta Daninha, 2013
O estudo da anatomia e morfologia das plantas pode ajudar a conhecer prováveis mecanismos que promovem maior capacidade competitiva pelos recursos naturais, principalmente água, luz e nutrientes, além da maior capacidade na retenção e/ou impedimento no ...
V.C. Cunha   +5 more
doaj  

Potential of Vochysia divergens extracts as a post-emergence bioherbicide [PDF]

open access: yesBrazilian Journal of Biology
The genus Vochysia, particularly Vochysia divergens Pohl, has been studied for its diverse biological activities and phytochemical composition. This study investigates the phytotoxic potential of V.
R. de Almeida   +7 more
doaj   +1 more source

Dinâmica de infestação de plantas daninhas em variedades de cana-de-açúcar

open access: yesBioscience Journal, 2013
A seleção de genótipos mais adaptados às condições de estresses bióticos e abióticos aliados com características agronômicas favoráveis são fatores preponderantes para o sucesso no cultivo da cana-de-açúcar. Neste contexto objetivou-se avaliar a dinâmica
Edimilson Alves Barbosa   +6 more
doaj  

Efeito da cobertura morta de milheto (Pennisetum americanum) sobre a eficácia do herbicida metribuzin no controle de Ipomoea grandifolia e Sida rhombifolia Effect of Pennisetum americanum mulch in the metribuzin efficacy on the control of Ipomoea grandifolia and Sida rhombifolia

open access: yesPlanta Daninha, 2007
Com o objetivo de avaliar a eficácia do metribuzin (480 g i.a. ha-1) associado à palha de milheto no controle de Ipomoea grandifolia e Sida rhombifolia, foram realizados dois experimentos em casa de vegetação.
M.C. Godoy   +4 more
doaj   +1 more source

NOTAS CITOTAXONOMJCAS SOBRE MALVACEAS

open access: yesBonplandia, 1969
Se presentan por primera vez los números cromosómicos de las siguientes especies: Palaua rhombifolia Graham (2n = 10), Sida angustissima St. Hil. (2n = 14), S. hassleri Hochr. (2n = 14), S. lindheimeri A. Gr. (2n = 28), S.
Antonio Krapovickas
doaj  

Anti-hyperglycemic, antioxidant, and anti-inflammatory activities of extracts and metabolites from Sida acuta and Sida rhombifolia

open access: yesQuímica Nova
Species of genus Sida are used around the world for a large amount of therapeutic treatments, including hyperglycemia. α-Glucosidase inhibitors are recognized as valuable tools for reducing postprandial hyperglycemia by retarding absorption of glucose ...
Amira Arciniegas   +4 more
doaj   +1 more source

Acylated Flavone O-Glycoside from Sida rhombifolia

open access: yes, 2015
A new acylated flavone O-glycoside has been isolated from the methanol fraction of the root part of the Sida rhombifolia. The structure of the new compound has been established as, 4',6-dihydroxy-7-methoxy flavone-3-O-α-(6"'-acetyl glucosyl-β-1,4-rhamnopyranose) based on the spectral (UV, IR, 1H, 13C NMR and Mass) data.
openaire   +1 more source

Phytosociology and morphological characteristics of weeds after corn cropping on conventional till in the savanna of Roraima = Fitossociologia e características morfológicas de plantas daninhas após cultivo de milho em plantio convencional no cerrado de Roraima

open access: yesAgro@mbiente On-line, 2013
The Phytosociology is the floristic and structural study playing a very important role for the management of Weeds. The objective of this work was to study the phytosociology of weed after growing corn in conventional tillage in the savanna of Roraima ...
José de Anchieta Alves Albuquerque   +5 more
doaj  

Evaluación preliminar de toxicidad, genotoxicidad y actividad antimicrobiana de Sida rhombifolia L. Preliminary evaluation of Sida rhombifolia L. toxicity, genotoxicity and antimicrobial activity

open access: yesRevista Colombiana de Biotecnología, 2007
La actual predisposición a consumir productos naturales y, en muchas regiones, la difícil disponibilidad y accesibilidad a los medicamentos han llevado a las poblaciones del mundo a buscar otras alternativas para aliviar sus dolencias.
Brugés Keile   +1 more
doaj  

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