Results 111 to 120 of about 293,429 (371)

Pollen nightmare: elevated airborne pollen levels at night [PDF]

Aerobiologia, 2016
High airborne pollen concentrations are generally associated with daylight hours when it is sunny and warm and plants release pollen into the air (Alcázar et al. 1999; Dahl et al. 2013). In contrast, cooler night-time periods are usually considered to be the time of low-allergy risk.
Matt Smith, Łukasz Grewling, Paweł Bogawski   +2 more
openaire   +3 more sources

Standard methods for inexpensive pollen loads authentication by means of computer vision and machine learning [PDF]

arXiv, 2015
We present a complete methodology for authenticating local bee pollen against fraudulent samples using image processing and machine learning techniques. The proposed standard methods do not need expensive equipment such as advanced microscopes and can be used for a preliminary fast rejection of unknown pollen types. The system is able to rapidly reject
arxiv  

Variations in the Availability of Pollen Resources Affect Honey Bee Health

PLoS ONE, 2016
Intensive agricultural systems often expose honey bees (Apis mellifera L.) to large temporal variations in the availability (quantity, quality and diversity) of nutritional resources.
Garance Di Pasquale, C. Alaux, Y. Le Conte, J. Odoux, M. Pioz, B. Vaissière, L. Belzunces, A. Decourtye   +7 more
semanticscholar   +1 more source

Individual behavioral rules sustain the cell allocation pattern in the combs of honey bee colonies (Apis mellifera) [PDF]

, 2012
In the beeswax combs of honey bees, the cells of brood, pollen, and honey have a consistent spatial pattern that is sustained throughout the life of a colony. This spatial pattern is believed to emerge from simple behavioral rules that specify how the queen moves, where foragers deposit honey/pollen and how honey/pollen is consumed from cells.
arxiv   +1 more source

Relationship between airborne pollen assemblages and major meteorological parameters in Zhanjiang, South China.

PLoS ONE, 2020
Pollen is an important component of bioaerosol and the distribution of pollen and its relationship with meteorological parameters can be analyzed to better prevent hay fever.
Chen Bishan, Li Bing, Chen Chixin, Song Junxia, Zhu Shulin, Li Cailang, Yang Siqiao, Luo Chuanxiu   +7 more
doaj   +1 more source

Analysis of 3D Urticaceae Pollen Classification Using Deep Learning Models [PDF]

Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - BIOIMAGING, 2025
Due to the climate change, hay fever becomes a pressing healthcare problem with an increasing number of affected population, prolonged period of affect and severer symptoms. A precise pollen classification could help monitor the trend of allergic pollen in the air throughout the year and guide preventive strategies launched by municipalities.
arxiv   +1 more source

Assessment of pollen rewards by foraging bees

, 2017
Summary The removal of pollen by flower-visiting insects is costly to plants, not only in terms of production, but also via lost reproductive potential.
E. Nicholls, N. H. D. Ibarra
semanticscholar   +1 more source

Automatic Pollen Grain and Exine Segmentation from Microscope Images [PDF]

arXiv, 2015
In this article, we propose an automatic method for the segmentation of pollen grains from microscope images, followed by the automatic segmentation of their exine. The objective of exine segmentation is to separate the pollen grain in two regions of interest: exine and inner part. A coarse-to-fine approach ensures a smooth and accurate segmentation of
arxiv  

CHIP‐NMC: An Application for Corn Hybrid and Inbred Prediction of Nixtamalization Moisture Content

Cereal Chemistry, EarlyView.
ABSTRACT Background and Objectives The quantity of water absorbed during the nixtamalization of maize greatly influences the final product's taste, nutritional profile, and machinability. A machine learning model that uses near‐infrared spectroscopy to predict the moisture content of nixtamalized maize inbred lines was previously developed.
Michael J. Burns, Sydney P. Berry, Molly Loftus, Amanda M. Gilbert, Candice N. Hirsch   +4 more
wiley   +1 more source

Cyclic nucleotide-gated channel 18 is an essential Ca2+ channel in pollen tube tips for pollen tube guidance to ovules in Arabidopsis

Proceedings of the National Academy of Sciences of the United States of America, 2016
Significance In flowering plants, pollen tubes deliver paired sperm cells into ovules for double fertilization by perceiving and responding to multiple attractants secreted from the ovules. Ca2+ gradients in pollen tube tips are essential for pollen tube
Qi-Fei Gao, Li-Li Gu, Hui-Qin Wang, Cui-Fang Fei, Xiang Fang, J. Hussain, Shujing Sun, Jing-Yun Dong, Hongtao Liu, Yong-Fei Wang   +9 more
semanticscholar   +1 more source