Madrid, 38 years of pollen observation: Platanus pollen counts in a changing weather.

2018 ◽  
Author(s):  
Jonathan Kilimajer Astudillo
Keyword(s):  
Pollen Counts

scholarly journals The Relationship between Symptom Flare of Atopic Dermatitis and Airborne Japanese Cedar and Cypress Pollen Counts: A Self-Scoring Diary Study

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Haruko Nishie ◽  
Mariko Kato ◽  
Shiori Kato ◽  
Hiroshi Odajima ◽  
Rumiko Shibata ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
Real Time ◽  
Pollen Season ◽  
Airborne Pollen ◽  
Japanese Cedar ◽  
Diary Study ◽  
Pollen Counts ◽  
High Level ◽  
The Relationship

Background. With an increase in Japanese cedar and cypress (JC) pollinosis, the relationship between JC pollen and atopic dermatitis (AD) has been studied. Some reports suggest that JC pollen can be one exacerbating factor for AD, but there has been no report that discusses JC pollen counts relating to AD symptom flare although actual airborne JC pollen counts can widely fluctuate throughout the pollen season. Objective. The relationship between symptom flare of AD and airborne JC pollen counts was examined. Methods. We monitored JC pollen counts in real time and divided the counts into low and high level. We then analyzed self-scored “itch intensity” recorded by 14 AD patients through a self-scoring diary. Results. Among the 14 patients, 7 had significantly higher itch intensity while the pollen counts were high. Conclusion. Even during the pollen season, actual airborne pollen counts can widely fluctuate. Our study suggested that symptom flare of AD could be influenced by the actual pollen counts.

P090 A Case of recurrent angioedema associated with elevated tree pollen counts

2016 ◽  
Vol 117 (5) ◽  
pp. S48
Author(s):  
D. Jayaraman ◽  
N. Rabinovitch
Keyword(s):  
Tree Pollen ◽  
Pollen Counts

Chestnut Pollen Counts Related to Patients Pollinosis in Paris

1987 ◽  
pp. 113-117 ◽  
Author(s):  
J-P. Sutra ◽  
M-R. Ickovic ◽  
H. De Luca ◽  
G. Peltre ◽  
B. David
Keyword(s):  
Pollen Counts

Detection of airborne Par j 1 and Par j 2 allergens in relation to Urticaceae pollen counts in different bioclimatic areas

2010 ◽  
Vol 105 (1) ◽  
pp. 50-56 ◽  
Author(s):  
Victoria Jato ◽  
F. Javier Rodríguez-Rajo ◽  
Zulima González-Parrado ◽  
Belén Elvira-Rendueles ◽  
Stella Moreno-Grau ◽  
...  
Keyword(s):  
Pollen Counts ◽  
Urticaceae Pollen

scholarly journals A prognostic pollen emissions model for climate models (PECM1.0)

2017 ◽  
Author(s):  
Matthew C. Wozniak ◽  
Allison Steiner
Keyword(s):  
United States ◽  
Land Cover ◽  
Climate Models ◽  
Climate Model ◽  
Vegetation Type ◽  
Global Climate ◽  
The United States ◽  
Global Climate Models ◽  
Pollen Counts ◽  
Surface Pollen

Abstract. We develop a prognostic model of Pollen Emissions for Climate Models (PECM) for use within regional and global climate models to simulate pollen counts over the seasonal cycle based on geography, vegetation type and meteorological parameters. Using modern surface pollen count data, empirical relationships between prior-year annual average temperature and pollen season start dates and end dates are developed for deciduous broadleaf trees (Acer, Alnus, Betula, Fraxinus, Morus, Platanus, Populus, Quercus, Ulmus), evergreen needleleaf trees (Cupressaceae, Pinaceae), grasses (Poaceae; C3, C4), and ragweed (Ambrosia). This regression model explains as much as 57 % of the variance in pollen phenological dates, and it is used to create a climate-flexible phenology that can be used to study the response of wind-driven pollen emissions to climate change. The emissions model is evaluated in a regional climate model (RegCM4) over the continental United States by prescribing an emission potential from PECM and transporting pollen as aerosol tracers. We evaluate two different pollen emissions scenarios in the model: (1) using a taxa-specific land cover database, phenology and emission potential, and (2) a PFT-based land cover, phenology and emission potential. The resulting surface concentrations for both simulations are evaluated against observed surface pollen counts in five climatic subregions. Given prescribed pollen emissions, the RegCM4 simulates observed concentrations within an order of magnitude, although the performance of the simulations in any subregion is strongly related to the land cover representation and the number of observation sites used to create the empirical phenological relationship. The taxa-based model provides a better representation of the phenology of tree-based pollen counts than the PFT-based model, however we note that the PFT-based version provides a useful and climate-flexible emissions model for the general representation of the pollen phenology over the United States.

RECIPROCAL TRANSLOCATIONS INDUCED BY X-RAYS AND THERMO-NEUTRONS IN WILD SORGHUM (S. PURPUREO-SERICEUM ASCHERS AND SCHWEINF.)

1968 ◽  
Vol 10 (1) ◽  
pp. 152-160 ◽  
Author(s):  
T. P. Wu ◽  
C. P. Pi
Keyword(s):  
Considerable Degree ◽  
Seedling Height ◽  
X Rays ◽  
Wild Sorghum ◽  
Reciprocal Translocations ◽  
Pollen Counts ◽  
Significant Difference ◽  
Radiation Treatments

Dry seeds of S. purpureo-sericeum were irradiated with either X-rays or thermo-neutrons with three exposures each. No difference was shown in germination between the irradiated treatments and the control. The percentage of survival was greatly reduced to 2.2% in seeds treated with X-rays. However, there was no significant difference in survival between the thermo-neutron treatments and the control. Both radiation treatments inhibited seedling height to a considerable degree, and the variability of seedling height increased with higher exposures of irradiation. The types and the frequency of induced interchanges were proportional to the exposure of thermo-neutron irradiations.Twenty six translocation heterozygous plants were analyzed and considered to be semisterile plants. Spore quartet analysis revealed that the two types of adjacent segregations occur with nearly the same frequency.Six plants with pseudo-isochromosomes were detected. Pseudo-isochromosomes were often delayed in anaphase movement. They were excluded from daughter nuclei at telophase stages and eventually became micronuclei in the spore quartets.Two plants with a ring-of-six, and one plant with two pseudo-isochromosomes plus a ring-of-six were also found among the materials irradiated with high exposures of thermo-neutrons. Pollen counts showed that they had the lowest fertility among translocation heterozygous plants and no seed was obtained.

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