Results 101 to 110 of about 293,429 (371)

Ecological stoichiometry of the honeybee: Pollen diversity and adequate species composition are needed to mitigate limitations imposed on the growth and development of bees by pollen quality

PLoS ONE, 2017
The least understood aspects of the nutritional needs of bees are the elemental composition of pollen and the bees’ need for a stoichiometrically balanced diet containing the required proportions of nutrients. Reduced plant diversity has been proposed as
Michał Filipiak, K. Kuszewska, M. Asselman, B. Denisow, E. Stawiarz, M. Woyciechowski, J. Weiner   +6 more
semanticscholar   +1 more source

Pollen Histochemistry and Pollen : Ovule Ratios in Zingiberaceae [PDF]

Annals of Botany, 2004
Pollen grains of 37 species from 11 genera in the family Zingiberaceae were examined to assess qualitatively starch or lipid contents; the pollen grain and ovule numbers per flower and pollen : ovule ratios were also counted and calculated. Pollen : ovule ratios were studied to reveal patterns of variation in the Zingiberaceae.Freshly open flowers with
Zhongyi Chen, Y. J. Wang, Dianxiang Zhang   +2 more
openaire   +3 more sources

Analysis of plant metabolomics data using identification‐free approaches

Applications in Plant Sciences, EarlyView.
Abstract Plant metabolomes are structurally diverse. One of the most popular techniques for sampling this diversity is liquid chromatography–mass spectrometry (LC‐MS), which typically detects thousands of peaks from single organ extracts, many representing true metabolites.
Xinyu Yuan, Nathaniel S. S. Smith, Gaurav D. Moghe   +2 more
wiley   +1 more source

Poaceae pollen as the leading aeroallergen worldwide: A review

Allergy. European Journal of Allergy and Clinical Immunology, 2017
The Poaceae family comprises over 12 000 wind‐pollinated species, which release large amounts of pollen into the atmosphere. Poaceae pollen is currently regarded as the leading airborne biological pollutant and the chief cause of pollen allergy worldwide.
H. García-Mozo
semanticscholar   +1 more source

The transcription factors and pathways underpinning male reproductive development in Arabidopsis

Frontiers in Plant Science
As Arabidopsis flowers mature, specialized cells within the anthers undergo meiosis, leading to the production of haploid microspores that differentiate into mature pollen grains, each containing two sperm cells for double fertilization.
Anna Johanna Wiese, Elnura Torutaeva, Elnura Torutaeva, David Honys, David Honys   +4 more
doaj   +1 more source

Unsupervised Representations of Pollen in Bright-Field Microscopy [PDF]

arXiv, 2019
We present the first unsupervised deep learning method for pollen analysis using bright-field microscopy. Using a modest dataset of 650 images of pollen grains collected from honey, we achieve family level identification of pollen. We embed images of pollen grains into a low-dimensional latent space and compare Euclidean and Riemannian metrics on these
arxiv  

Waste Management and Waste Disposal Detected by Combination of Analytical Methods: Late Bronze Age Březnice Settlement Site (South Bohemia)

Archaeological Prospection, EarlyView.
ABSTRACT Waste disposal processes and landfill management are crucial subjects in the field of settlement archaeology. Our study is focused on understanding the processes that are connected to the formation of the infills of settlement features and the recycling of the building materials (daub and wood) and waste management.
Tereza Šálková, Kristýna Budilová, Jaromír Kovárník, Antonín Majer, Jan Novák, Jaroslav Pavelka, Barbora Strouhalová, Libor Vobejda, Ondřej Šťastný, Martin Kuna, Ondřej Chvojka   +10 more
wiley   +1 more source

[b][/b]Relative efficiencies of the Burkard 7-Day, Rotorod and Burkard Personal samplers for Poaceae and Urticaceae pollen under field conditions

Annals of Agricultural and Environmental Medicine, 2014
[b]Introduction[/b]. In aerobiological studies it is often necessary to compare concentration data recorded with different models of sampling instrument.
Robert Peel, Roy Kennedy, Matt Smith, Ole Hertel   +3 more
doaj  

Frustration-induced inherent instability and growth oscillations in pollen tubes [PDF]

, 2012
In a seed plant a pollen tube is a vessel that transports male gamete cells to an ovule to achieve fertilization. It consists of one elongated cell, which exhibits growth oscillations, until it bursts completing its function. Up till now, the mechanism behind the periodic character of the growth has not been fully understood.
arxiv   +1 more source

The role of Moringa oleifera in the development of alternative biofuels, under the concept of an integral one‐tree biorefinery: A minireview

Biofuels, Bioproducts and Biorefining, EarlyView.
Abstract The Moringa oleifera oil tree is commonly known as the ‘tree of life’ or the ‘miracle tree’ owing to its multiple benefits for humans. The different parts that make up this tree (leaves, seeds and bark) have been used to treat various ailments, diseases and wounds. However, in recent years this tree is being used by the scientific community to
J. L. Aleman‐Ramirez, Patrick U. Okoye, S. Saldaña‐Trinidad, S. Torres‐Arellano, P. J. Sebastian   +4 more
wiley   +1 more source