Results 91 to 100 of about 109,083 (346)

Effect of Fruit Maturation Stage on the Chemical Composition and Antioxidant and Cytotoxic Activities of Piper nigrum Essential Oil

Flavour and Fragrance Journal, EarlyView.
The essential oils of Piper nigrum show marked chemical and biological variation across fruit maturation stages. Ripe fruits yield oils with the strongest antioxidant and cytotoxic activities, demonstrating that maturation directly modulates volatile composition and enhances the bioactive potential of this aromatic species.
Marcio Marcelo da Siva Pessoa, Jorddy Neves Cruz, Ingryd Nayara de Farias Ramos, André Salim Khayat, Eloisa Helena de Aguiar Andrade, José de Arimatéia Rodrigues do Rego, Davi do Socorro Barros Brasil   +6 more
wiley   +1 more source

Angiospermas aquáticas da Área de Proteção Ambiental (APA) do Cariri, Paraíba, Brasil

Rodriguésia
A Área de Proteção Ambiental (APA) do Cariri está localizada entre os municípios de Boa Vista e Cabaceiras, estado da Paraíba, Nordeste do Brasil. Esta APA apresenta microhabitats variados, dentre os quais se destacam os corpos aquáticos.
Elimar Alves de Lima, Hermes de Oliveira Machado-Filho, José Iranildo Miranda de Melo   +2 more
doaj   +1 more source

Changes to Cretaceous surface fire behaviour influenced the spread of the early angiosperms

New Phytologist, 2016
Angiosperms evolved and diversified during the Cretaceous period. Early angiosperms were short‐stature weedy plants thought to have increased fire frequency and mortality in gymnosperm forest, aiding their own expansion.
C. Belcher, V. Hudspith
semanticscholar   +1 more source

Pollen Morphology of Crucianella L. (Rubiaceae) Based on Light and Scanning Electron Microscope Data and Implications for Taxonomy

Microscopy Research and Technique, EarlyView.
This study provides the palynological analysis of 12 Crucianella L. taxa using LM and SEM. Variations in pollen size, aperture number, and exine ornamentation were identified as key traits, demonstrating their taxonomic value for distinguishing closely related species and subspecies within the genus. ABSTRACT Crucianella L.
Sevcan Celenk, Zelal Kücük, Gülşah Bağcıvan, Ruziye Daşkın   +3 more
wiley   +1 more source

Variation in pollen limitation among reproductive modules points to likely resource reallocation in the alpine plant Veratrum grandiflorum

Nordic Journal of Botany, EarlyView.
Pollen limitation, a decrease in seed production due to insufficient pollen receipt, may influence plant demography and the evolution of sexual systems. Its empirical estimation of pollen supplementation of some of the flowers on an individual is well known to be prone to overestimation due to potential resource reallocation among the individual's ...
Xia Jiang, Kai‐Hsiu Chen, Shengman Lyu, Ling Liu, Meixian Yu, John R. Pannell, Guoxing Cao   +6 more
wiley   +1 more source

Flora do Espírito Santo: clado de Merianthera e gêneros afins (Melastomataceae)

Rodriguésia
Resumo Melastomataceae possui 22 gêneros e 182 espécies no Espírito Santo. Neste trabalho, são apresentados os tratamentos taxonômicos dos cinco gêneros pertencentes ao clado de Merianthera e gêneros afins, com 14 espécies: Behuria (3 espécies ...
Thuane Bochorny, Renato Goldenberg
doaj   +1 more source

Are sexes natural kinds? [PDF]

, 2021
Asking whether the sexes are natural kinds amounts to asking whether the categories, female and male, identify real divisions in nature, like the distinctions between biological species, or whether they mark merely artificial or arbitrary distinctions ...
Khalidi, Muhammad Ali
core  

Alpine flora of Kashmir Himalaya: floristic assessment, life history traits and threat status

Nordic Journal of Botany, EarlyView.
Alpine ecosystems in the Himalaya are considered to be at a higher risk to anthropogenic global change drivers. The Kashmir Himalaya, located in the north‐western side of the Himalayan biodiversity hotspot, harbors a diverse alpine flora, which remains systematically little investigated.
Bilal A. Rasray, Showkeen A. Lone, Rameez Ahmad, Tajamul Islam, Hitendra Padalia, Anzar Ahmad Khuroo   +5 more
wiley   +1 more source

MACROFITOBENTOS DEL SUBLITORAL SOMERO DEL MUNICIPIO PLAYA, LA HABANA, CUBA Macrophytobenthos of the shallow sublittoral at Playa, La Habana, Cuba

Revista de Investigaciones Marinas, 2015
Se presenta el inventario taxonómico actualizado del macrofitobentos de la zona litoral somera del municipio Playa, La Habana, Cuba. Se realizaron recolectas mensuales en cinco sitios con diferente grado de afectación antrópica entre los años 2011 y 2014.
Patricia González-Sánchez, Beatriz Martínez-Daranas, Macario Esquivel Céspedes, Arsenio J. Areces-Mallea   +3 more
doaj  

Observations of the Habits of \u3ci\u3eLygaeus Kalmii Angustomarginatus\u3c/i\u3e (Hemiptera: Lygaeidae) in Southern Michigan [PDF]

, 2017
Lygaeus kalmii Stal (Hemiptera: Lygaeidae) is an insect found throughout the eastern United States and Canada. There is extensive taxonomic literature on this insect (Stil, 1874; Townsend, 1887; Parshey, 1919, 1923; Slater and Knopf, 1969), but very ...
Hunt, Linda-Margaret
core   +2 more sources