Results 161 to 170 of about 284,257 (387)

SHED: Stem cells from human exfoliated deciduous teeth

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2003
M. Miura   +6 more
semanticscholar   +1 more source

Effects of the Grazing Exclusion Policy on Pheasant Nesting Success and Predation Risk in the Protected Areas of Southwestern China 森林禁牧对中国西南保护区雉类繁殖成功率与捕食风险的影响研究

open access: yesIntegrative Conservation, EarlyView.
Grazing bans improved vegetation but increased predator activity, reducing pheasant nesting success in Giant Panda National Park—highlighting trade‐offs in conservation policy. ABSTRACT Grazing has a profound impact on forest ecosystems and biodiversity.
Yifei Zhang   +7 more
wiley   +1 more source

Can Solar‐Powered Irrigation Systems Naturally Meet Crop Water Requirements? Proof of Concept From a Case Study in Sub‐Saharan Africa

open access: yesIrrigation and Drainage, EarlyView.
ABSTRACT Irrigation scheduling is crucial for ensuring precise water delivery to crops. However, in many sub‐Saharan African irrigation schemes, water is applied without considering crop water needs, resulting in low crop water productivity and low yields. Solar‐powered irrigation systems can automatically meet these needs by utilizing solar radiation,
Eric Oppong Danso   +15 more
wiley   +1 more source

The prevalence of impacted permanent maxillary canines in Maltese school children : a pilot study [PDF]

open access: yes, 1995
The aetiology of ectopic canines is not clear. A number of causes have been put forward such as the long path of eruption of the maxillary canine, lack of guidance by the lateral incisor root, narrow arches, cystic enlargement of the dental follicle ...
Camilleri, Simon
core  

Pollen Morphology of Selected Endemic Eudicots From the FLORAS Botanical Garden, Southern Bahia, Brazil

open access: yesMicroscopy Research and Technique, EarlyView.
This study describes the pollen morphology of twelve endemic species from the Atlantic Forest, revealing subtle morphopollinic variations. Diagnostic characters such as pollen shape, exine ornamentation, and amb type highlight the region's floristic diversity, providing valuable insights into the ecological and conservation significance of Brazil's ...
Agatha Carvalho Pinto   +6 more
wiley   +1 more source

Utility of near‐surface phenology in estimating productivity and evapotranspiration across diverse ecosystems

open access: yesJournal of Environmental Quality, EarlyView.
Abstract Agroecosystems, which include row crops, pasture, and grass and shrub grazing lands, are sensitive to changes in management, weather, and genetics. To better understand how these systems are responding to changes, we need to improve monitoring and modeling carbon and water dynamics.
Sander O. Denham   +17 more
wiley   +1 more source

Carbon loss by deciduous trees in a CO2-rich ancient polar environment [PDF]

open access: yes, 2003
Fossils demonstrate that deciduous forests covered the polar regions for much of the past 250 million years 1 when the climate was warm and atmospheric CO2 high 2.
Beerling, D.J.   +2 more
core  

Devastating Rio Doce mining disaster sends shockwaves through earthworm populations

open access: yesJournal of Environmental Quality, EarlyView.
Abstract The Fundão dam breach is considered one of the most severe environmental mining disasters globally, causing widespread changes to the soils of the Rio Doce watershed, one of Brazil's most important catchments. Given the ecological importance of earthworms to soil structure and dynamics, we investigated the richness, abundance, and biomass of ...
Herlon Nadolny   +9 more
wiley   +1 more source

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