Results 71 to 80 of about 51,993 (280)

Efecto de factores ambientales en la actividad de la abeja y en el rendimiento de semilla de cebolla (Allium cepa L.) [PDF]

open access: yes, 2019
Los polinizadores son necesarios para producir semillas de cebolla. Esta especie es uno de los principales cultivos hortícolas. Dos tipos de variedades de cebolla se cultivan principalmente en todo el mundo: híbridos y cultivares de polinización abierta (
Caselles, Cristian   +2 more
core  

Pollination and nectar production of Psittacanthus schiedeanus (Loranthaceae) in central Veracruz, Mexico

open access: yesBotan‪ical Sciences, 2010
We assessed nectar production patterns, the breeding system, and overall pollinator dependence of Psittacanthus schiedeanus (Schlecht. & Cham.) G.Don (Loranthaceae), a mistletoe species that blooms in the late summer of the eastern cloud forests of ...
María Magdalena Ramírez   +1 more
doaj   +1 more source

Thermal inactivation of Byssochlamys nivea in pineapple nectar combined with preliminary high pressure treatments [PDF]

open access: yes, 2010
Byssochlamys nivea is a thermal resistant filamentous fungi and potential micotoxin producer. Recent studies have verified the presence of ascospores of such microorganism in samples of pineapple nectars.
Calado, V.   +5 more
core   +1 more source

NectarCAM : a camera for the medium size telescopes of the Cherenkov Telescope Array

open access: yes, 2015
NectarCAM is a camera proposed for the medium-sized telescopes of the Cherenkov Telescope Array (CTA) covering the central energy range of ~100 GeV to ~30 TeV.
Abril, O.   +65 more
core   +4 more sources

Self-pollination by sliding pollen in Caulokaempferia coenobialis (Zingiberaceae) [PDF]

open access: yes, 2005
Caulokaempferia coenobialis (Zingiberaceae) forms dense populations on steep cliffs in shady, humid monsoon forests in south China. It produces few consecutively opening bright yellow flowers that are 3 cm long and oriented parallel to the ground.
Chen, Zhongyi   +3 more
core   +1 more source

Application of Principal Component Analysis and Probabilistic Neural Networks in Ferralsols Recovery Evaluation Through Planting of Mabea Fistulifera and Eucalyptus Urograndis

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT This study presents an innovative assessment model for analyzing the evolution of degraded soils subjected to different reclamation strategies. The proposal combines statistical and artificial intelligence tools to jointly integrate multiple physical and chemical soil properties, allowing for a more synthetic view of the processes.
Melissa Alexandre Santos   +7 more
wiley   +1 more source

Floral nectar production in Helleborus foetidus: an ultrastructural study

open access: yesBotany, 2012
The floral nectaries of Helleborus foetidus L. were studied using scanning and transmission electron microscopy, as well as light microscopy. Nectaries are tubular and consist of an external epidermis, a photosynthesizing parenchyma, large branches of vascular tissue, a nectar-producing parenchyma, and an internal epidermis.
Vesprini J., Pacini E., Nepi M.
openaire   +4 more sources

Biosurfactant production byPseudomonasstrains isolated from floral nectar [PDF]

open access: yesJournal of Applied Microbiology, 2015
To screen and identify biosurfactant-producing Pseudomonas strains isolated from floral nectar; to characterize the produced biosurfactants; and to investigate the effect of different carbon sources on biosurfactant production.Four of eight nectar Pseudomonas isolates were found to produce biosurfactants.
Z, Ben Belgacem   +9 more
openaire   +2 more sources

Longitudinal Videofluorographic Dysphagia Measures in Progressive Supranuclear Palsy

open access: yesMovement Disorders Clinical Practice, EarlyView.
Abstract Background Dysphagia can lead to fatal aspiration pneumonia in progressive supranuclear palsy (PSP). Little is known about the longitudinal progression of dysphagia or whether it differs across PSP clinical variants. Objectives To characterize longitudinal changes in dysphagia across PSP variants and determine relationships with disease ...
Anna Chiara Cattani   +8 more
wiley   +1 more source

Generalist‐pollinated Arabis alpina exhibits floral scent variation at multiple scales

open access: yesNordic Journal of Botany, EarlyView.
Plants that depend on animals for reproduction often use complex floral traits to attract pollinators. Floral scent is recognized as part of the pollinator attraction module and can be shaped by plant‐pollinator interactions. In recent decades, research has started to reveal the dynamic properties of floral scent, identifying patterns of spatial and ...
Hanna Thosteman   +5 more
wiley   +1 more source

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