keyword
MENU ▼
Read by QxMD icon Read
search

Pollen count

keyword
https://www.readbyqxmd.com/read/28448597/reconstructing-grassland-fire-history-using-sedimentary-charcoal-considering-count-size-and-shape
#1
Berangere A Leys, Julie L Commerford, Kendra K McLauchlan
Fire is a key Earth system process, with 80% of annual fire activity taking place in grassland areas. However, past fire regimes in grassland systems have been difficult to quantify due to challenges in interpreting the charcoal signal in depositional environments. To improve reconstructions of grassland fire regimes, it is essential to assess two key traits: (1) charcoal count, and (2) charcoal shape. In this study, we quantified the number of charcoal pieces in 51 sediment samples of ponds in the Great Plains and tested its relevance as a proxy for the fire regime by examining 13 potential factors influencing charcoal count, including various fire regime components (e...
2017: PloS One
https://www.readbyqxmd.com/read/28417625/influence-of-sensitization-patterns-on-fractional-exhaled-nitric-oxide-in-asthmatic-children
#2
Miao Qing, Xu Wei, Li Zhen, Guan Hui, Liu Xiao-Ying, Huang Hui-Jie, Wang Yan, Ren Yi-Xin, Liu Yong-Ge, Xiang Li
Fractional exhaled nitric oxide (FeNO) has been suggested as a non-invasive biomarker of airway inflammation, which is increased in atopic subjects. Whether sensitization to particular allergens is a predictive factor for increased FeNO levels is not yet fully understood. We conducted a retrospective cross-sectional study. From October to December in 2015, the medical documents of 127 mild, steroid-naive asthmatic children and 34 healthy age-matched children were enrolled in this study. The results of the FeNO measurements, skin prick test, and the spirometry were collected for analysis...
February 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28378978/poaceae-secale-spp-and-artemisia-spp-pollen-in-the-air-at-two-sites-of-different-degrees-of-urbanisation
#3
Aleksandra Kruczek, Małgorzata Puc, Tomasz Wolski
INTRODUCTION: Among herbal plants, most cases of allergic reactions, like seasonal inflammation of nasal mucosa, conjunctivitis and pollen asthma, are related to the allergens from grass pollen. As the blossoming and pollination of rye is known to start the pollen season of grasses, information about the airborne rye pollen count permits alerting the people allergic to certain allergens contained in rye pollen. An important cause of allergy is also the pollen from wormwood, blossoming in late summer, as its two main allergens produce cross-reactions with many other plant allergens...
March 21, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/28362553/agronomic-performance-of-insect-protected-and-herbicide-tolerant-mon-89034-%C3%A3-tc1507-%C3%A3-nk603-%C3%A3-das-40278-9-corn-is-equivalent-to-that-of-conventional-corn
#4
Denise T Rezende de Cerqueira, Ariane C Schafer, Brandon J Fast, Rod A Herman
Agronomic characteristics of genetically modified (GM) MON 89034 × TC1507 × NK603 × DAS-40278-9 (PowerCore™ Enlist™), MON 89034 × TC1507 × NK603 (PowerCore™), and DAS-40278-9 (Enlist™) corn, a non-GM near-isogenic hybrid, and 2 commercial non-GM hybrids were assessed in a field study to determine if the agronomic performance of the GM corn hybrids is equivalent to that of non-transgenic hybrid corn. The MON 89034 × TC1507 × NK603 × DAS-40278-9 hybrid corn was developed through stacking of 4 individual transgenic events, MON 89034, TC1507, NK603, and DAS-40278-9 by traditional breeding and contains the cry1A...
March 31, 2017: GM Crops & Food
https://www.readbyqxmd.com/read/28360459/correlation-of-pollen-counts-and-number-of-hospital-visits-of-asthmatic-and-allergic-rhinitis-patients
#5
Nishtha Singh, Udaiveer Singh, Dimple Singh, Mangal Daya, Virendra Singh
AIMS AND OBJECTIVES: Environmental pollens are known to cause exacerbation of symptoms of patients with allergic rhinitis (AR) and asthma. During pollen months, number of patients visiting hospital has been shown to increase in some studies. However, in India, such studies are lacking. Therefore, we aimed to study pollen counts and to find its correlation with number of new patients attending Asthma Bhawan for 2 years. MATERIALS AND METHODS: Aerobiological sampling was done using Burkard 24 h spore trap system...
March 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28331111/longitudinal-monitoring-of-tree-airborne-pollen-in-japan
#6
Reiko Kishikawa, Eiko Kotoh, Chie Oshikawa, Nobuo Soh, Terufumi Shimoda, Akemi Saito, Norio Sahashi, Tadao Enomoto, Atsushi Usami, Hidetoyo Teranishi, Yohko Fujisaki, Toshitaka Yokoyama, Kohji Murayama, Tohru Imai, Yuma Fukutomi, Masami Taniguchi, Tomoaki Iwanaga
RATIONAL: In Japan patients with Japanese Cedar (JC) pollinosis have increased nation widely since the latter of 1970's. The Ministry of Health and Welfare of Japanese Governments has begun to take preventive measures against JC pollinosis and airborne pollen monitoring has begun to investigate as a causative agent since 1986. We have estimated the longitudinal investigation result for successful prevention and treatment against pollinosis in Japan. METHOD: We have monitored airborne pollen all year around since July 1986 by gravitational pollen sampler, Durham's sampler, at more than 20 locations in the Japanese Islands...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28294585/static-and-elevated-pollen-traps-do-not-provide-an-accurate-assessment-of-personal-pollen-exposure
#7
V Penel, M Calleja, C Pichot, D Charpin
Background. Volumetric pollen traps are commonly used to assess pollen exposure. These traps are well suited for estimating the regional mean airborne pollen concentration but are likely not to provide an accurate index of personal exposure. In this study, we tested the hypothesis that hair sampling may provide different pollen counts from those from pollen traps, especially when the pollen exposure is diverse. Methods. We compared pollen counts in hair washes to counts provided by stationary volumetric and gravimetric pollen traps in 2 different settings: urban with volunteers living in short distance from one another and from the static trap and suburban in which volunteers live in a scattered environment, quite far from the static trap...
March 2017: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28217431/a%C3%A2-novel-experimental-technology-for-testing-efficacy-of-air-purifiers-on-pollen-reduction
#8
Karl-Christian Bergmann, Torsten Sehlinger, Julia Gildemeister, Torsten Zuberbier
BACKGROUND: Allergenic pollen exposure is mostly seen as an outdoor phenomenon but studies have shown an indoor exposure: different pollen species including birch and grass pollen in houses, schools, and shops are leading to long-lasting symptoms even after the pollen season because pollen settle on surfaces and re-enter the indoor air depending on ventilation. To reduce indoor pollen load, windows need to be closed and devices should be used: as pure wiping and cleaning of surfaces is mostly not sufficient, air cleaners may be helpful in reducing pollen counts in indoor environment...
2017: Allergo Journal International
https://www.readbyqxmd.com/read/28122685/aerobiological-importance-and-allergic-sensitization-to-amaranthaceae-under-arid-climate-conditions
#9
Belén Elvira-Rendueles, Juan J Zapata, Juan C Miralles, José M Moreno, Antonio García-Sánchez, Luis Negral, Stella Moreno-Grau
Species of the Amaranthaceae family are abundant in the Southeast of Spain, one of the driest areas in Europe. The Amaranthaceae include species of interest from the point of view of allergic diseases. With the expansion of aridity, many species belonging to this family will be favoured. The objectives of this study were: first, to define the prevalence of sensitization to Amaranthaceae pollen in allergic patients in the Southeast of Spain; second, to present the aerobiological features of this taxon; and, finally, to demarcate those periods of increased risk of suffering allergic symptoms with the aim of improving the diagnosis and prevention of hay fever...
January 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28120599/parietaria-pollination-duration-myth-or-fact
#10
R Ariano, L Cecchi, S Voltolini, O Quercia, E Scopano, G Ciprandi
Background. Even though the Parietaria pollen season may be rather long, it is commonly thought that Parietaria pollen is a perennial allergen present along the whole year. Objective. This study aimed at investigating the duration of Parietaria pollen season during a 10-year period in Italy, analysing also the annual pollen quantity and the differences among geographical areas. Methods. Pollen count was assessed daily for 10 years. Globally, ten Italian centers measured Parietaria pollen count. Start date, peak date, end date, duration (days), peak value, and seasonal pollen index were evaluated in each center...
January 2017: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28024990/molecular-approaches-for-the-analysis-of-airborne-pollen-a-case-study-of-juniperus-pollen
#11
Rashmi Prava Mohanty, Mark Alan Buchheim, Estelle Levetin
BACKGROUND: Pollen monitoring is a common and vital tool in the field of allergy, creating awareness in pollen sensitive individuals. Traditionally, pollen monitoring has been based on conventional microscopic counting techniques that are labor intensive and limited in the identification to the genus or family level. Molecular techniques provide an alternative approach that is less labor intensive and enable identification of any species by its genetic fingerprint. OBJECTIVE: To use quantitative polymerase chain reaction (qPCR) to evaluate pollen concentrations in air samples...
December 23, 2016: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28024227/the-role-of-outdoor-fungi-on-asthma-hospital-admissions-in-children-and-adolescents-a-5-year-time-stratified-case-crossover-analysis
#12
Rachel Tham, Constance H Katelaris, Don Vicendese, Shyamali C Dharmage, Adrian J Lowe, Gayan Bowatte, Philip Taylor, Pamela Burton, Michael J Abramson, Bircan Erbas
BACKGROUND: Some fungal spores can trigger asthma exacerbation but knowledge of which outdoor fungal spores contribute to asthma hospitalisation is limited. OBJECTIVES: To examine the role of outdoor fungal spores in child and adolescent asthma hospitalisations. METHODS: We conducted a bi-directional time-stratified case-crossover study of child and adolescent asthma hospitalisations over 5 years. Conditional logistic regression assessed the role of 20 fungi taxa (Same day [L0] and lagged [L1-3]) adjusted for maximum temperature, humidity and grass pollen...
April 2017: Environmental Research
https://www.readbyqxmd.com/read/28008277/technical-and-clinical-validation-of-an-environmental-exposure-unit-for-ragweed
#13
Paul J Gomes, Keith J Lane, Endri Angjeli, Linda Stein, Mark B Abelson
BACKGROUND: Allergic rhinitis is a common condition, with ragweed pollen one of the more prevalent aeroallergens. Environmental exposure units such as the Allergen BioCube(®) are valuable models for clinical allergy studies. A study was conducted to validate the Allergen BioCube for uniform ragweed pollen concentrations and clinically relevant sign and symptom responses to ragweed exposure. METHODS: Ragweed pollen concentrations were measured on 3 consecutive days in the Allergen BioCube and verified by Rotorod collection and continuous laser particle count measurements...
2016: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/27911374/flow-cytometric-analysis-of-particle-bound-bet-v-1-allergen-in-pm10
#14
Katrin Süring, Sabine Bach, Conny Höflich, Wolfgang Straff
Flow cytometry is a method widely used to quantify suspended solids such as cells or bacteria in a size range from 0.5 to several tens of micrometers in diameter. In addition to a characterization of forward and sideward scatter properties, it enables the use of fluorescent labeled markers like antibodies to detect respective structures. Using indirect antibody staining, flow cytometry is employed here to quantify birch pollen allergen (precisely Bet v 1)-loaded particles of 0.5 to 10 µm in diameter in inhalable particulate matter (PM10, particle size ≤10 µm in diameter)...
November 19, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27903420/microbiology-of-processed-edible-insect-products-results-of-a-preliminary-survey
#15
Nils Th Grabowski, Günter Klein
Little is known of the microbiology of processed insect products. The present survey analysed a total of n=38 samples of deep-fried and spiced (Acheta domesticus, Locusta migratoria, and Omphisa fuscidentalis), cooked in soy sauce ("tsukudani"; Oxya yezoensis, Vespula flaviceps, and Bombyx mori), dried (A. domesticus, L. migatoria, Alphitobius diaperinus, Tenebrio molitor, B. mori, Hermetia illucens, and Musca domestica), powdered (H. illucens, T. molitor) and other (incl. deep-frozen B. mori and honeybee pollen) insect products microbiologically (total bacterial count [TBC], Enterobacteriaceae, staphylococci, bacilli, and yeasts and moulds counts, salmonellae, Listeria monocytogenes, and Escherichia coli)...
February 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27890967/airborne-pollen-and-fungal-spores-in-garki-abuja-north-central-nigeria
#16
Dimphna Nneka Ezike, Catherine V Nnamani, Oluwatoyin T Ogundipe, Olushola H Adekanmbi
The ambient atmosphere is dominated with pollen and spores, which trigger allergic reactions and diseases and impact negatively on human health. A survey of pollen and fungal spores constituents of the atmosphere of Garki, Abuja (North-Central Nigeria) was carried out for 1 year (June 1, 2011-May 31, 2012). The aim of the study was to determine the prevalence and abundance of pollen and fungal spores in the atmosphere and their relationship with meteorological parameters. Airborne samples were trapped using modified Tauber-like pollen trap, and the recipient solutions were subjected to acetolysis...
2016: Aerobiologia
https://www.readbyqxmd.com/read/27864812/how-in-vitro-assays-contribute-to-allergy-diagnosis
#17
REVIEW
Anne Casset, Naji Khayath, Frédéric de Blay
Diagnosis of allergic disorders is based upon the clinical history of the disease, the immunoglobulin E (IgE) antibody response, and the allergen exposure. During the last decade, many changes have occurred in the in vitro diagnostic tests used in daily practice. The most important one is the use of allergenic molecules, which helps to define severe profile of allergy and/or to better understand cross-reactivity. The correlation between IgE sensitization and bronchial or nasal response in provocation tests is not so clear, which implies that such tests are still helpful in allergy diagnosis...
November 2016: Current Allergy and Asthma Reports
https://www.readbyqxmd.com/read/27847501/chicken-igy-fc-linked-to-bordetella-avium-ompa-and-taishan-pinus-massoniana-pollen-polysaccharide-adjuvant-enhances-macrophage-function-and-specific-immune-responses
#18
Wenwen Dong, Hao Zhang, He Huang, Jianbo Zhou, Liping Hu, Ailing Lian, Lijun Zhu, Ningning Ma, Pingping Yang, Kai Wei, Ruiliang Zhu
Fc-fusion technologies, in which immunoglobulin Fc is genetically fused to an antigenic protein, have been developed to confer antibody-like properties to proteins and peptides. Mammalian IgG Fc fusion exhibits improved antigen-induced immune responses by providing aggregates with high avidity for the IgG Fc receptor and salvaging the antigenic portion from endosomal degradation. However, whether the linked chicken IgY Fc fragment shares similar characteristics to mammalian IgG Fc remains unclear. In this study, we linked the chicken IgY Fc gene to the outer membrane protein A (ompA) of Bordetella avium through overlapping PCR...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27795686/induced-parthenogenesis-by-gamma-irradiated-pollen-in-loquat-for-haploid-production
#19
Manuel Blasco, María Luisa Badenes, María Del Mar Naval
Successful haploid induction in loquat (Eriobotrya japonica (Thunb.) Lindl.) through in situ-induced parthenogenesis with gamma-ray irradiated pollen has been achieved. Female flowers of cultivar 'Algerie' were pollinated using pollen of cultivars 'Changhong-3', 'Cox' and 'Saval Brasil' irradiated with two doses of gamma rays, 150 and 300 Gy. The fruits were harvested 90, 105 and 120 days after pollination (dap). Four haploid plants were obtained from 'Algerie' pollinated with 300-Gy-treated pollen of 'Saval Brasil' from fruits harvested 105 dap...
September 2016: Breeding Science
https://www.readbyqxmd.com/read/27761736/the-medical-and-scientific-responsibility-of-pollen-information-services
#20
Katharina Bastl, Markus Berger, Karl-Christian Bergmann, Maximilian Kmenta, Uwe Berger
Pollen information as such is highly valuable and was considered so far as a self-evident good free for the public. The foundation for reliable and serious pollen information is the careful, scientific evaluation of pollen content in the air. However, it is essential to state and define now the requirements for pollen data and qualifications needed for institutions working with pollen data in the light of technical developments such as automated pollen counting and various political interests in aerobiology including attempts to finally acknowledge pollen and spores as relevant biological particles in the air worth being considered for pollution and health directives...
January 2017: Wiener Klinische Wochenschrift
keyword
keyword
13109
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"