Aeropalinología de la ciudad de Yerba Buena, provincia de Tucumán (Argentina). Aeropalinology of Yerba Buena city, province of Tucumán (Argentina)

2010 ◽  
Vol 35 ◽  
pp. 115-131 ◽  
Author(s):  
María Elena García
Keyword(s):  
Pollen Grains ◽  
Pollen Calendar ◽  
Spore Trap ◽  
Continuous Sampling ◽  
Pollen Types ◽  
Atmospheric Pollen ◽  
Cultivated Species ◽  
Pollen Variation ◽  
The City

Español. Durante los años 1999 - 2002 se llevó a cabo la primera caracterización aerobiológica de la ciudad de Yerba Buena. El muestreo atmosférico se realizó con un captador gravimétrico de tipo Durham. El análisis de las muestras permitió la identificación de 46 tipos polínicos. Los granos de polen más relevantes en el muestreo son de especies cultivadas como Cupressaceae, Morus sp., Broussonetia sp., Fraxinus sp., Liquidambar sp., Salix sp. y Pinus sp. Desde julio a octubre se obtuvo el mayor registro de polen atmosférico con el 70,84 % anual, con una predominancia de granos de polen de especies arbóreas, el 25,05 % de noviembre a abril con un aporte principalmente de granos de polen de especies herbáceas y el 3,57 % de mayo a junio sin contribuciones dominantes de algún tipo polínico. Se elaboró un calendario polínico basado en los 17 tipos de polen de mayor registro atmosférico y se lo comparó con calendarios polínicos obtenidos en ciudades del país. La floración en las Sierra del San Javier en Tucumán, es marcadamente estacional con una acumulación de más de 70% de las especies que florecen en el período primaveral. El muestreo continuado a lo largo de 3 años ha permitido observar que las variaciones polínicas estacionales de la atmósfera de la ciudad de Yerba Buena se hallan en relación con los factores fenológicos y meteorológicos propios de cada año. English.  The first aerobiologic characterization of Yerba Buena city in Tucumán (Argentina) was carried out for the period 1999-2002 using a Durham gravimetric spore trap. The analysis of samples allowed the identification of 46 pollen types. The most outstanding pollen grains in these samples came from cultivated species such as Cupressaceae, Morus sp., Broussonetia sp., Fraxinus sp., Liquidambar sp., Salix sp.and Pinus sp. From July to October the largest atmospheric pollen records were obtained with 70,84% in arboreal species predominantly. From November to April, an important contribution of 25,05% in herbaceous species mainly, and with a 3,57% from May to June without observing predominant contribution of any pollen type. A pollen calendar based on the most frequent 17 pollen types, containing the largest atmospheric records, was elaborated. We compared the pollen calendar obtained with those of other cities in the country. Flowering in the Sierra San Javier at Tucumán is markedly seasonal with an accumulation of over 70% of the species that bloom in the spring period. Continuous sampling during 3 years has revealed that the seasonal pollen variation in the atmosphere of the city of Yerba Buena, is in connection with the phenological and meteorological factors characteristic of every year. 

scholarly journals Palynological characterization of honey samples from Kwara State, Nigeria

2017 ◽  
Vol 52 (1) ◽  
pp. 7-14
Author(s):  
SD Oyeyemi ◽  
J Kayode
Keyword(s):  
Pollen Grains ◽  
Species Level ◽  
Palynological Analysis ◽  
Genus Level ◽  
Pollen Types ◽  
Family Level

Palynological analysis of honey samples from different localities in Kwara State, Nigeria was carried out to isolate and identified pollen types in the honey samples. Out of forty two pollen types belonging to twenty two botanical families recovered, twenty five were identified to species level, eight to genus level and eight to family level. A total of 849,978 pollen grains were counted with 46,355 in Shao, 101,356 in Ganmo, 22,000 in Idofian, 28,337 in Omupo, 200,090 in Iludun Oro, 298,079 in Ijagbo, 22,100 in Offa I and 131,142 in Afon. The major pollen occurrences in the honey samples include those of Sarcocephaluslatifolius, Parkiabiglobosa, Phyllantusdiscoideus, Tridaxprocubens, Combretaceae/Melastomataceae, Spondiasmombins and Hymenocardiaacida. Other important honey plants identified are Elaeisguineensis, Lanneasp, Parinarisp, Celtissp and Entadaabssynica. All these are characteristic plant taxa of the Forest-Savanna ecotype of the studied area. The presence of relatively high quantity of pollen shows their richness in pollen composition and also a clear evidence that the honey are from botanical sourceand also multifloral.Bangladesh J. Sci. Ind. Res. 52(1), 7-14, 2017

scholarly journals Land-Use and Height of Pollen Sampling Affect Pollen Exposure in Munich, Germany

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 145 ◽  
Author(s):  
Jesús Rojo ◽  
Jose Oteros ◽  
Antonio Picornell ◽  
Franziska Ruëff ◽  
Barbora Werchan ◽  
...  
Keyword(s):  
Airborne Pollen ◽  
Pollen Grains ◽  
Ground Level ◽  
Large Area ◽  
Dispersal Capacity ◽  
Pollen Types ◽  
Pollen Concentrations ◽  
Pollen Sources ◽  
Poaceae Pollen ◽  
The City

Airborne pollen concentrations vary depending on the location of the pollen trap with respect to the pollen sources. Two Hirst-type pollen traps were analyzed within the city of Munich (Germany): one trap was located 2 m above ground level (AGL) and the other one at rooftop (35 m AGL), 4.2 km apart. In general, 1.4 ± 0.5 times higher pollen amounts were measured by the trap located at ground level, but this effect was less than expected considering the height difference between the traps. Pollen from woody trees such as Alnus, Betula, Corylus, Fraxinus, Picea, Pinus and Quercus showed a good agreement between the traps in terms of timing and intensity. Similar amounts of pollen were recorded in the two traps when pollen sources were more abundant outside of the city. In contrast, pollen concentrations from Cupressaceae/Taxaceae, Carpinus and Tilia were influenced by nearby pollen sources. The representativeness of both traps for herbaceous pollen depended on the dispersal capacity of the pollen grains, and in the case of Poaceae pollen, nearby pollen sources may influence the pollen content in the air. The timing of the pollen season was similar for both sites; however, the season for some pollen types ended later at ground level probably due to resuspension processes that would favor recirculation of pollen closer to ground level. We believe measurements from the higher station provides a picture of background pollen levels representative of a large area, to which local sources add additional and more variable pollen amounts.

scholarly journals Purification of Hollow Sporopollenin Microcapsules from Sunflower and Chamomile Pollen Grains

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2094
Author(s):  
Jose Manuel Ageitos ◽  
Sandra Robla ◽  
Lorena Valverde-Fraga ◽  
Marcos Garcia-Fuentes ◽  
Noemi Csaba
Keyword(s):  
Drug Delivery ◽  
Pollen Grains ◽  
Morphological Characterization ◽  
Product Density ◽  
Low Protein ◽  
Pollen Types ◽  
Delivery Platform ◽  
Nanoporous Surface ◽  
First Time

Pollen grains are natural microcapsules comprised of the biopolymer sporopollenin. The uniformity and special tridimensional architecture of these sporopollenin structures confer them attractive properties such as high resistance and improved bioadhesion. However, natural pollen can be a source of allergens, hindering its biomedical applicability. Several methods have been developed to remove internal components and allergenic compounds, usually involving long and laborious processes, which often cannot be extended to other pollen types. In this work, we propose an abridged protocol to produce stable and pristine hollow pollen microcapsules, together with a complete physicochemical and morphological characterization of the intermediate and final products. The optimized procedure has been validated for different pollen samples, also producing sporopollenin microcapsules from Matricaria species for the first time. Pollen microcapsules obtained through this protocol presented low protein content (4.4%), preserved ornamented morphology with a nanoporous surface, and low product density (0.14 g/cm3). These features make them interesting candidates from a pharmaceutical perspective due to the versatility of this biomaterial as a drug delivery platform.

scholarly journals Atmospheric pollen and spore content in the urban area of the city of Medellin, Colombia

Hoehnea ◽  
2015 ◽  
Vol 42 (1) ◽  
pp. 9-19 ◽  
Author(s):  
Fernando Alzate Guarín ◽  
Mario Alberto Quijano Abril ◽  
Astrid Alvarez ◽  
Ramiro Fonnegra
Keyword(s):  
Urban Area ◽  
Considerable Increase ◽  
Airborne Pollen ◽  
Pollen Grains ◽  
Airborne Spores ◽  
Spores And Pollen ◽  
Atmospheric Pollen ◽  
Pollen And Spores ◽  
Airborne Pollen And Spores ◽  
The City

The atmosphere of the urban area of the city of Medellin, Colombia was monitored with the objective of identifying airborne pollen and spores throughout a whole year. Sampling was performed between February 2010 and March 2011, coinciding with the La Niña climate phenomenon, which is characterized by a considerable increase in precipitation. Samples of airborne spores and pollen were obtained from a suction Hirst-type volumetric sampler. A total of 62 pollen and spores types were recorded during sampling, of which 30 were angiosperms, two were gymnosperms, 10 were monilophytes, and 20 were fungi. The families displaying the highest pollen counts were Oleaceae, Poaceae, Cyperaceae, Chenopodiaceae and Polypodiaceae. We recorded an inverse relationship among precipitation and the quantity and diversity of pollen grains and fern spores. The angiosperm and gymnosperm taxa showed the greatest recorded grains throughout the sampling year with respect to the species mentioned herewith, which have been reported as allergenic in various aerobiological studies.

scholarly journals Application of decision tree algorithms for discriminating among woody plant taxa based on the pollen season characteristics

2015 ◽  
Vol 67 (4) ◽  
pp. 1127-1135 ◽  
Author(s):  
Agnieszka Kubik-Komar ◽  
Elżbieta Kubera ◽  
Krystyna Piotrowska-Weryszko ◽  
Elżbieta Weryszko-Chmielewska
Keyword(s):  
Decision Tree ◽  
Pollen Season ◽  
Airborne Pollen ◽  
Classification Tree ◽  
Pollen Grains ◽  
Pollen Concentration ◽  
Pollen Types ◽  
Tree Algorithms ◽  
Atmospheric Pollen ◽  
Parameter Ranges

The aim of this study was to verify whether and which parameters of the atmospheric pollen season can distinguish between pollen types, the ranges of parameter values that delineate classes of taxa, and finally which taxa are similar to others within the domain of these parameter ranges. Decision tree algorithms were applied and the best tree was chosen to describe the rules of pollen classification. The study material consisted of airborne pollen grains of the following eight taxa: Alnus, Betula, Carpinus, Corylus, Cupressaceae, Fraxinus, Populus and Ulmus. Research was conducted in Lublin in eastern Poland during 2001-2013. The following six atmospheric pollen season parameters were analyzed: season start and end, duration, maximum daily pollen concentration, date of maximum pollen concentration, and the Seasonal Pollen Index (SPI). Four algorithms were used in data analysis and the J4.8 algorithm was chosen as the best for taxa classification, date of the end of season and the SPI value belonging to characteristics that served most to discriminate between pollen types. Based on the classification tree, the following four groups of taxa were identified: (i) Ulmus; (ii) Corylus, Alnus, Populus; (iii) Betula; and (iv) Carpinus, Fraxinus, Cupressaceae.

Aerobiology of Grass Pollen in the City Atmosphere of Melbourne: Effects of Weather Parameters and Pollen Sources.

1979 ◽  
Vol 27 (3) ◽  
pp. 333 ◽  
Author(s):  
IJ Smart ◽  
WG Tuddenham ◽  
RB Knox
Keyword(s):  
Grass Pollen ◽  
Spore Trap ◽  
North West ◽  
The North ◽  
High Maximum ◽  
Atmospheric Pollen ◽  
Canary Grass ◽  
Weather Parameters ◽  
Maximum Temperatures ◽  
The City

The incidence of grass pollen, estimated by using a Burkard spore trap sited above a city building, is correlated with meteorological factors. Pollen incidence was greatest on days with high maximum temperatures and reduced on days of high humidity or rainfall. Winds from the north, north-west and south-east carried the highest concentrations of pollen. Remote sensing image analysis has been used to identify the grasslands over which these winds may have passed before entering the city. An analysis of pollen yield and relative abundance of grasses in pastures and roadsides north of Melbourne has implicated ryegrass (Lolium perenne and L. rigidum) and canary grass (Phalaris tuberosa) as the major sources of atmospheric pollen.

scholarly journals Airborne Pollens and their Association with Meteorological Parameters in the Atmosphere of Shiraz, Southwest Iran

2021 ◽  
Author(s):  
Heidar Ali Kafashan ◽  
Ahmad Reza Khosravi ◽  
Soheila Alyasin ◽  
Najmeh Sepahi ◽  
Zahra Kanannejad ◽  
...  
Keyword(s):  
Meteorological Parameters ◽  
Airborne Pollen ◽  
Pollen Grains ◽  
Spore Trap ◽  
Pollen Counts ◽  
Positive Correlation ◽  
Airborne Pollens ◽  
Pollen Types ◽  
Causative Agents ◽  
Southwest Of Iran

Airborne pollen is considered one of the causative agents of hay fever, allergic rhinitis, conjunctivitis, and asthma. We aimed to investigate airborne pollens in the context of Shiraz located in the southwest of Iran and find their association with meteorological parameters. The survey was conducted from October 2017 to September 2018, using seven days of volumetric Burkard spore trap, located in the center of the city. A total of 5810 pollen grains/m3 belonging to 15 taxa were identified and recorded. Among them, 73.8% was the tree, while the grass, shrub, and weed constituted 13.56%, 3.5%, and 9.2% of total reported pollens, respectively. The major pollen types were Platanaceae (28.39%), Oleaceae (21.17%), Pinaceae (15.11%), Amaranthaceae (9.29%), and Brassicaceae (8.02%). A higher number of pollen counts and types were recorded in March, followed by September, while it was lower in May. Meteorological parameters were correlated with the monthly pollen counts. Wind speed was found to have a positive correlation with Platanaceae concentration. The significant correlation between pollen concentration and the temperature was positive for Poaceae, Amaranthaceae, and Plantaginaceae and negative for Rosaceae, Oleaceae, and Ulmaceae. Poaceae and Amaranthaceae were negatively correlated with humidity and positively with Rosaceae, Oleaceae, and Plantaginaceae. A negative correlation was found between rainfall and Poaceae and Amaranthaceae, while Plantaginaceae had a positive correlation with this parameter. The results of this study may be helpful for allergologists in the diagnosis and treatment of airborne allergic disorders due to pollen grains.

scholarly journals Pollen spectrum of the honey of Apis mellifera L. collected in the period of honey production

2019 ◽  
Vol 12 (6) ◽  
pp. 69
Author(s):  
A. M. V. Santos ◽  
A. S. Nascimento ◽  
J. S. Santos ◽  
S. M. P. C. Silva ◽  
C. I. S. Lucas ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Pollen Grains ◽  
Optical Microscope ◽  
Pollen Spectrum ◽  
Honey Production ◽  
Pollen Content ◽  
Pollen Types ◽  
Production Period ◽  
Sample Set

Knowledge of the flora that bees visit is important for characterization of their products and conservation of flora and fauna. Thus, this study identified the flora used by Apis mellifera L. (Hymenoptera: Apidae) during the honey production period through the pollen spectrum. Honey samples were collected at apiaries in the municipality of Cruz das Almas, Bahia, Brazil. International methods for samples preparation were used. ETOH was use for honey dilution and subsequently subjected to acidic treatment by the standard method of acetolysis. The pollen content resulting from the analysis was examined under an optical microscope, with separation and counting of pollen grains. Pollen types were identified by consultation and comparison to reference pollen collections and specialized literature. Twenty-seven pollen types distributed among 19 botanical families were identified in the sample set, and Fabaceae, Rubiaceae, Asteraceae and Sapindaceae were the families with a greater number of pollen types. The most frequent pollen types were Mimosa tenuiflora, Vernonia condensata, Bidens, Hyptis, Amaranthus spinosus, Schefflera morototoni and Serjania pernambucensis, all with relative frequency in samples equal to or greater than 70%. The honey evaluated showed a diverse pollen spectrum, evidencing multifloral characteristic.

Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)

2019 ◽  
Vol 6 (1) ◽  
pp. 13 ◽  
Author(s):  
Denise M. D. S. Mouga ◽  
Gabriel R. Schroeder ◽  
Nilton P. Vieira Junior ◽  
Enderlei Dec
Keyword(s):  
Pollen Morphology ◽  
Pollen Grains ◽  
Radial Symmetry ◽  
Morphological Data ◽  
Medium Size ◽  
Ornamental Species

The pollen morphology of thirteen species of Cactaceae was studied: M. backebergiana F.G. Buchenau, M. decipiens Scheidw, M. elongata DC, M. gracilis Pfeiff., M. hahniana Werderm., M. marksiana Krainz, M. matudae Bravo, M. nejapensis R.T. Craig & E.Y. Dawson, M. nivosa Link ex Pfeiff., M. plumosa F.A.C. Weber, M. prolifera (Mill.) Haw, M. spinosissima var. “A Peak” Lem. and M. voburnensis Scheer. All analysed pollen grains are monads, with radial symmetry, medium size (M. gracilis, M. marksiana, M. prolifera, large), tricolpates (dimorphs in M. plumosa [3-6 colpus] and M. prolifera [3-6 colpus]), with circular-subcircular amb (quadrangular in M. prolifera and M. plumosa with six colpus). The pollen grains presented differences in relation to the shape and exine thickness. The exine was microechinate and microperforated. The pollen morphological data are unpublished and will aid in studies that use pollen samples. These pollen grains indicate ornamental cacti.

scholarly journals Genomic investigation of a dengue virus outbreak in Thiès, Senegal, in 2018

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Amy Gaye ◽  
Tolla Ndiaye ◽  
Mouhamad Sy ◽  
Awa B. Deme ◽  
Alphonse B. Thiaw ◽  
...  
Keyword(s):  
West Africa ◽  
Dengue Virus ◽  
Clinical Signs ◽  
Health Concern ◽  
Public Health Concern ◽  
Local Circulation ◽  
Viral Genomes ◽  
Genomic Characterization ◽  
The City

AbstractDengue virus is a major and rapidly growing public health concern in tropic and subtropic regions across the globe. In late 2018, Senegal experienced its largest dengue virus outbreak to date, covering several regions. However, little is known about the genetic diversity of dengue virus (DENV) in Senegal. Here we report complete viral genomes from 17 previously undetected DENV cases from the city of Thiès. In total we identified 19 cases of DENV in a cohort of 198 individuals with fever collected in October and November 2018. We detected 3 co-circulating serotypes; DENV 3 was the most frequent accounting for 11/17 sequences (65%), 4 (23%) were DENV2 and 2 (12%) were DENV1. Sequences were most similar to recent sequences from West Africa, suggesting ongoing local circulation of viral populations; however, detailed inference is limited by the scarcity of available genomic data. We did not find clear associations with reported clinical signs or symptoms, highlighting the importance of testing for diagnosing febrile diseases. Overall, these findings expand the known range of DENV in Senegal, and underscore the need for better genomic characterization of DENV in West Africa.

Sign in / Sign up

Export Citation Format

Share Document