Results 101 to 110 of about 25,665 (226)

Effects of a large irrigation reservoir on aquatic and riparian plants: a history of survival and loss [PDF]

open access: yes, 2019
Dammed rivers have unnatural stream flows, disrupted sediment dynamics, and rearranged geomorphologic settings. Consequently, fluvial biota experiences disturbed functioning in the novel ecosystems.
Aguiar, Francisca C.   +3 more
core   +1 more source

Stilbenoids in Lianas of Gnetum parvifolium.

open access: yesChemical and Pharmaceutical Bulletin, 2001
Five new stilbene dimers were isolated from the lianas of Gnetum parvifolium in addition to known stilbenoids. The structures of the compounds were established on the basis of spectroscopic evidence, including long-range coupling and nuclear Overhauser effect experiments, in NMR spectrum.
T, Tanaka   +11 more
openaire   +3 more sources

Do fragment size and edge effects predict carbon stocks in trees and lianas in tropical forests? [PDF]

open access: yes, 2017
Summary Tropical forests are critical for protecting global biodiversity and carbon stores. While forest degradation and fragmentation cause negative impacts on trees, many woody lianas benefit, with associated negative effects on carbon storage.
Burnham K.P.   +7 more
core   +2 more sources

Characterizing amyloid and tau positron emission tomography‐based stages across the clinical continuum

open access: yesAlzheimer's &Dementia, Volume 22, Issue 1, January 2026.
Abstract INTRODUCTION We standardized positron emission tomography (PET) data across multiple cohorts and tracers to characterize the frequency of amyloid and tau PET severity along the clinical continuum. METHODS Clinical stage was defined using cohort‐specific criteria and included cognitively unimpaired (CU), mild cognitive impairment (MCI), and ...
Karly A. Cody   +21 more
wiley   +1 more source

Gray matter microstructure from in vivo diffusion magnetic resonance imaging reflects post mortem neuropathology severity and clinical progression of Alzheimer's disease

open access: yesAlzheimer's &Dementia, Volume 22, Issue 1, January 2026.
Abstract INTRODUCTION Diffusion‐weighted imaging derived mean diffusivity (MD) correlates with Alzheimer's disease (AD) biomarkers, yet its neuropathological correlates remain unclear. METHODS Diffusion‐weighted imaging, post mortem neuropathology, and cognitive performance data were obtained from the National Alzheimer's Coordinating Center (N = 97 ...
Zaki Alasmar   +9 more
wiley   +1 more source

The impact of lianas on tree regeneration in tropical forest canopy gaps: evidence for an alternative pathway of gap‐phase regeneration [PDF]

open access: yes, 2000
1 Regeneration in forest canopy gaps is thought to lead invariably to the rapid recruitment and growth of trees and the redevelopment of the canopy. Our observations, however, suggest that an alternate successional pathway is also likely, whereby gap ...
Carson, Walter P.   +2 more
core   +1 more source

Alzheimer's disease polygenic risk in early‐ and late‐onset Alzheimer's disease

open access: yesAlzheimer's &Dementia, Volume 22, Issue 1, January 2026.
Abstract INTRODUCTION The genetic basis of sporadic early‐onset Alzheimer's disease (EOAD) remains largely unknown, prompting evaluation of late‐onset Alzheimer's disease (LOAD) polygenic risk in EOAD. METHODS A LOAD polygenic score (PGS) was calculated in the Longitudinal Early‐onset Alzheimer's Disease Study (LEADS) and Alzheimer's Disease ...
Julian V. Pentchev   +56 more
wiley   +1 more source

Characterization of Complete Chloroplast Genome Sequences of Three Tropical Liana Dalbergia Species and Comparative Analysis of Phylogenetic and Structure Variations in Dalbergia Genus

open access: yesHorticulturae
The Dalbergia genus, a morphologically diverse group within the Fabaceae family, encompasses species of significant value in furniture production and medicinal and aromatic applications.
Jun Wang   +4 more
doaj   +1 more source

Comparación temporal de la riqueza y composición de insectos inductores de agallas en el dosel de un bosque tropical

open access: yesRevista Mexicana de Biodiversidad, 2010
Se compara, entre 2 periodos de muestreos con 9 años de distancia entre sí, la riqueza y composición de especies que forman la comunidad de insectos inductores de agallas en el dosel del Parque Natural Metropolitano (PNM), un bosque seco tropical en la ...
Enrique Medianero   +2 more
doaj   +1 more source

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