The fertilizing element of plants that contains the male GAMETOPHYTES.
A growth from a pollen grain down into the flower style which allows two sperm to pass, one to the ovum within the ovule, and the other to the central cell of the ovule to produce endosperm of SEEDS.
The transfer of POLLEN grains (male gametes) to the plant ovule (female gamete).
Allergic rhinitis that occurs at the same time every year. It is characterized by acute CONJUNCTIVITIS with lacrimation and ITCHING, and regarded as an allergic condition triggered by specific ALLERGENS.
A plant genus in the family LILIACEAE generally growing in temperate areas. The word lily is also used in the common names of many plants of other genera that resemble true lilies. True lilies are erect perennial plants with leafy stems, scaly bulbs, usually narrow leaves, and solitary or clustered flowers.
A plant genus of the family BETULACEAE. The tree has smooth, resinous, varicolored or white bark, marked by horizontal pores (lenticels), which usually peels horizontally in thin sheets.
Antigen-type substances that produce immediate hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).
The reproductive organs of plants.
Substances found in PLANTS that have antigenic activity.
A plant genus of the family ASTERACEAE. The POLLEN is one cause of HAYFEVER.
A plant genus of the family CUPRESSACEAE. Cypress ordinarily refers to this but also forms part of the name of plants in other genera.
A plant genus of the family TAXODIACEAE. Its POLLEN is one of the major ALLERGENS.
Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not include proteins found in vegetables for which VEGETABLE PROTEINS is available.
The initial stages of the growth of SEEDS into a SEEDLINGS. The embryonic shoot (plumule) and embryonic PLANT ROOTS (radicle) emerge and grow upwards and downwards respectively. Food reserves for germination come from endosperm tissue within the seed and/or from the seed leaves (COTYLEDON). (Concise Dictionary of Biology, 1990)
The element in plants that contains the female GAMETOPHYTES.
The failure of PLANTS to complete fertilization and obtain seed (SEEDS) as a result of defective POLLEN or ovules, or other aberrations. (Dict. of Plant Genet. and Mol. Biol., 1998)
One of many different processes which occur in ANGIOSPERMS by which genetic diversity is maintained while INBREEDING is prevented.
A plant genus of the family BETULACEAE that is distinguished from birch (BETULA) by its usually stalked winter buds and by cones that remain on the branches after the small, winged nutlets are released.
A plant genus of the family Oleaceae. The olive fruit is the source of olive oil.
The encapsulated embryos of flowering plants. They are used as is or for animal feed because of the high content of concentrated nutrients like starches, proteins, and fats. Rapeseed, cottonseed, and sunflower seed are also produced for the oils (fats) they yield.
The atmospheric properties, characteristics and other atmospheric phenomena especially pertaining to WEATHER or CLIMATE.
A plant genus of the family BRASSICACEAE that contains ARABIDOPSIS PROTEINS and MADS DOMAIN PROTEINS. The species A. thaliana is used for experiments in classical plant genetics as well as molecular genetic studies in plant physiology, biochemistry, and development.
A large family of narrow-leaved herbaceous grasses of the order Cyperales, subclass Commelinidae, class Liliopsida (monocotyledons). Food grains (EDIBLE GRAIN) come from members of this family. RHINITIS, ALLERGIC, SEASONAL can be induced by POLLEN of many of the grasses.
A plant genus in the family PINACEAE, order Pinales, class Pinopsida, division Coniferophyta. It is the source of cedarwood oil. Cedar ordinarily refers to this but also forms part of the name of plants in other genera.
The total process by which organisms produce offspring. (Stedman, 25th ed)
A genus of Eurasian herbaceous plants, the poppies (family PAPAVERACEAE of the dicotyledon class Magnoliopsida), that yield OPIUM from the latex of the unripe seed pods.
Members of the group of vascular plants which bear flowers. They are differentiated from GYMNOSPERMS by their production of seeds within a closed chamber (OVARY, PLANT). The Angiosperms division is composed of two classes, the monocotyledons (Liliopsida) and dicotyledons (Magnoliopsida). Angiosperms represent approximately 80% of all known living plants.
Insect members of the superfamily Apoidea, found almost everywhere, particularly on flowers. About 3500 species occur in North America. They differ from most WASPS in that their young are fed honey and pollen rather than animal food.
Woody, usually tall, perennial higher plants (Angiosperms, Gymnosperms, and some Pterophyta) having usually a main stem and numerous branches.
The process of germ cell development in plants, from the primordial PLANT GERM CELLS to the mature haploid PLANT GAMETES.
Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in plants.
An immunoglobulin associated with MAST CELLS. Overexpression has been associated with allergic hypersensitivity (HYPERSENSITIVITY, IMMEDIATE).
A plant family of the order Fagales, subclass Hamamelidae, class Magnoliopsida. They have simple, serrate, alternate leaves. Male flowers are borne in long, pendulous catkins; the female in shorter, pendulous or erect catkins. The fruit is usually a small nut or a short-winged samara.
Proteins that originate from plants species belonging to the genus ARABIDOPSIS. The most intensely studied species of Arabidopsis, Arabidopsis thaliana, is commonly used in laboratory experiments.
A plant family of the order Pinales, class Pinopsida, division Coniferophyta (conifers). They are mainly resinous, aromatic evergreen trees.
PLANTS, or their progeny, whose GENOME has been altered by GENETIC ENGINEERING.
A plant genus of the family POACEAE that contains the Phl p 4 allergen.
The fusion of a male gamete with a female gamete from the same individual animal or plant.
The reproductive cells of plants.
Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.
The functional hereditary units of PLANTS.
A plant species of the family POACEAE. It is a tall grass grown for its EDIBLE GRAIN, corn, used as food and animal FODDER.
Epicutaneous or intradermal application of a sensitizer for demonstration of either delayed or immediate hypersensitivity. Used in diagnosis of hypersensitivity or as a test for cellular immunity.
A plant genus of the family CUPRESSACEAE. The species are slow growing coniferous evergreen trees or shrubs.
Immunosuppression by the administration of increasing doses of antigen. Though the exact mechanism is not clear, the therapy results in an increase in serum levels of allergen-specific IMMUNOGLOBULIN G, suppression of specific IgE, and an increase in suppressor T-cell activity.
Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
A sweet viscous liquid food, produced in the honey sacs of various bees from nectar collected from flowers. The nectar is ripened into honey by inversion of its sucrose sugar into fructose and glucose. It is somewhat acidic and has mild antiseptic properties, being sometimes used in the treatment of burns and lacerations.
The motion of air relative to the earth's surface.
A plant genus of the family SOLANACEAE. Members contain steroidal glycosides.
A plant genus of the family OLEACEAE. Members contain secoiridoid glucosides.
A plant genus of the family Cruciferae. It contains many species and cultivars used as food including cabbage, cauliflower, broccoli, Brussel sprouts, kale, collard greens, MUSTARD PLANT; (B. alba, B. junica, and B. nigra), turnips (BRASSICA NAPUS) and rapeseed (BRASSICA RAPA).
A plant genus of the family ASTERACEAE with strong-smelling foliage. It is a source of SANTONIN and other cytotoxic TERPENES.
Common member of the Gramineae family used as cattle FODDER. It harbors several fungi and other parasites toxic to livestock and people and produces allergenic compounds, especially in its pollen. The most commonly seen varieties are L. perenne, L. multiflorum, and L. rigidum.
A plant genus of the family SOLANACEAE. Members contain NICOTINE and other biologically active chemicals; its dried leaves are used for SMOKING.
The process of germ cell development from the primordial GERM CELLS to the mature haploid GAMETES: ova in the female (OOGENESIS) or sperm in the male (SPERMATOGENESIS).

Rational analyses of organelle trajectories in tobacco pollen tubes reveal characteristics of the actomyosin cytoskeleton. (1/2581)

To gain insight into the characteristics of organelle movement and the underlying actomyosin motility system in tobacco pollen tubes, we collected data points representing sequential organelle positions in control and cytochalasin-treated cells, and in a sample of extruded cytoplasm. These data were utilized to reconstruct approximately 900 tracks, representing individual organelle movements, and to produce a quantitative analysis of the movement properties, supported by statistical tests. Each reconstructed track appeared to be unique and to show irregularities in velocity and direction of movement. The regularity quotient was near 2 at the tip and above 3 elsewhere in the cell, indicating that movement is more vectorial in the tube area. Similarly, the progressiveness ratio showed that there were relatively more straight trajectories in the tube region than at the tip. Consistent with these data, arithmetical dissection revealed a high degree of randomlike movement in the apex, lanes with tip-directed movement along the flanks, and grain-directed movement in the center of the tube. Intercalated lanes with bidirectional movement had lower organelle velocity, suggesting that steric hindrance plays a role. The results from the movement analysis indicate that the axial arrangement of the actin filaments and performance of the actomyosin system increases from tip to base, and that the opposite polarity of the actin filaments in the peripheral (+-ends of acting filaments toward the tip) versus the central cytoplasm (+-ends of actin filaments toward to the grain) is installed within a few minutes in these tip-growing cells.  (+info)

Male gametic cell-specific gene expression in flowering plants. (2/2581)

The role of the male gamete-the sperm cell-in the process of fertilization is to recognize, adhere to, and fuse with the female gamete. These highly specialized functions are expected to be controlled by activation of a unique set of genes. However, male gametic cells traditionally have been regarded as transcriptionally quiescent because of highly condensed chromatin and a very reduced amount of cytoplasm. Here, we provide evidence for male gamete-specific gene expression in flowering plants. We identified and characterized a gene, LGC1, which was shown to be expressed exclusively in the male gametic cells. The gene product of LGC1 was localized at the surface of male gametic cells, suggesting a possible role in sperm-egg interactions. These findings represent an important step toward defining the molecular mechanisms of male gamete development and the cellular processes involved in fertilization of flowering plants.  (+info)

Exhaled and nasal NO levels in allergic rhinitis: relation to sensitization, pollen season and bronchial hyperresponsiveness. (3/2581)

Exhaled nitric oxide is a potential marker of lower airway inflammation. Allergic rhinitis is associated with asthma and bronchial hyperresponsiveness. To determine whether or not nasal and exhaled NO concentrations are increased in allergic rhinitis and to assess the relation between hyperresponsiveness and exhaled NO, 46 rhinitic and 12 control subjects, all nonasthmatic nonsmokers without upper respiratory tract infection, were randomly selected from a large-scale epidemiological survey in Central Norway. All were investigated with flow-volume spirometry, methacholine provocation test, allergy testing and measurement of nasal and exhaled NO concentration in the nonpollen season. Eighteen rhinitic subjects completed an identical follow-up investigation during the following pollen season. Exhaled NO was significantly elevated in allergic rhinitis in the nonpollen season, especially in perennially sensitized subjects, as compared with controls (p=0.01), and increased further in the pollen season (p=0.04), mainly due to a two-fold increase in those with seasonal sensitization. Nasal NO was not significantly different from controls in the nonpollen season and did not increase significantly in the pollen season. Exhaled NO was increased in hyperresponsive subjects, and decreased significantly after methacholine-induced bronchoconstriction, suggesting that NO production occurs in the peripheral airways. In allergic rhinitis, an increase in exhaled nitric oxide on allergen exposure, particularly in hyperresponsive subjects, may be suggestive of airway inflammation and an increased risk for developing asthma.  (+info)

LeProT1, a transporter for proline, glycine betaine, and gamma-amino butyric acid in tomato pollen. (4/2581)

During maturation, pollen undergoes a period of dehydration accompanied by the accumulation of compatible solutes. Solute import across the pollen plasma membrane, which occurs via proteinaceous transporters, is required to support pollen development and also for subsequent germination and pollen tube growth. Analysis of the free amino acid composition of various tissues in tomato revealed that the proline content in flowers was 60 times higher than in any other organ analyzed. Within the floral organs, proline was confined predominantly to pollen, where it represented >70% of total free amino acids. Uptake experiments demonstrated that mature as well as germinated pollen rapidly take up proline. To identify proline transporters in tomato pollen, we isolated genes homologous to Arabidopsis proline transporters. LeProT1 was specifically expressed both in mature and germinating pollen, as demonstrated by RNA in situ hybridization. Expression in a yeast mutant demonstrated that LeProT1 transports proline and gamma-amino butyric acid with low affinity and glycine betaine with high affinity. Direct uptake and competition studies demonstrate that LeProT1 constitutes a general transporter for compatible solutes.  (+info)

Process and current status of the epidemiologic studies on cedar pollinosis in Japan. (5/2581)

This paper reviews the present situation and future aspects of epidemiologic studies on Japanese cedar pollinosis. Increase of allergic rhinitis patients is observed in both the Patient Survey and the Reports on the Surveys of Social Medical Care Insurance Services, however, these surveys are conducted when cedar pollens do not pollute the air. Many have reported on the prevalence of pollinosis in limited areas but only a few nationwide epidemiologic surveys have been conducted. Most of the studies were conducted at special medical facilities such as university hospitals. There is a high possibility that patients who visit the specific facilities do not exactly represent the actual number of patients and epidemiologic pictures of pollinosis in Japan. The rapid advances in laboratory test methods may change the diagnostic criteria and increase the number of reported patients. Therefore, the prevalence of Japanese cedar pollinosis in Japan has not been determined yet. Determination of the prevalence of cedar pollinosis and description of the epidemiologic pictures constitute the essential steps toward the control of this clinical entity. Thus it is necessary to conduct an epidemiologic survey on Japanese representative samples with a standardized survey form with clear and concise diagnostic criteria.  (+info)

Pollen ultrastructure in anther cultures of Datura innoxia. I. Division of the presumptive vegetative cell. (6/2581)

Ultrastructural features of embryogenic pollen in Datura innoxia are described, just prior to, during, and after completion of the first division of the presumptive vegetative cell. In anther cultures initiated towards the end of the microspore phase and incubated at 28 degrees C in darkness, the spores divide within 24 h and show features consistent with those of dividing spores in vivo. Cytokinesis is also normal in most of the spores and the gametophytic cell-plate curves round the presumptive generative nucleus in the usual highly ordered way. Further differentiation of the 2 gametophytic cells does not take place and the pollen either switches to embryogenesis or degenerates. After 48-72 h, the remaining viable pollen shows the vegetative cell in division. The cell, which has a large vacuole and thin layer of parietal cytoplasm carried over from the microspore, divides consistently in a plane parallel to the microspore division. The dividing wall follows a less-ordered course than the gametophytic wall and usually traverses the vacuole, small portions of which are incorporated into the daughter cell adjacent to the generative cell. The only structural changes in the vegetative cell associated with the change in programme appear to be an increase in electron density of both plastids and mitochondria and deposition of an electron-dense material (possibly lipid) on the tonoplast. The generative cell is attached to the intine when the vegetative cell divides. Ribosomal density increases in the generative cell and exceeds that in the vegetative cell. A thin electron-dense layer also appears in the generative-cell wall. It is concluded that embryogenesis commences as soon as the 2 gametophytic cells are laid down. Gene activity associated with postmitotic synthesis of RNA and protein in the vegetative cell is switched off. The data are discussed in relation to the first division of the embryogenic vegetative cells in Nicotiana tabacum.  (+info)

Pollen ultrastructure in anther cultures of Datura innoxia. II. The generative-cell wall. (7/2581)

In young pollen grains of Datura innoxia, a wall of the usual hemispherical type separates the 2 gametophytic cells initially and, in the electron microscope, appears as an electron-translucent matrix which is contiguous with the intine. Before detachment of the generative cell from the intine, the matrix decreases in thickness and in places is dispersed altogether leaving the plasmalemmae on either side of it in close apposition. A particularly prominent zone, triangular in profile, is left where the wall joins with the intine. After detachment of the cell, remnants of the matrix can be seen distributed irregularly around the cell and it is supposed that these are partly derived from material in the triangular zone as the cell is drawn away from the intine. The wall residues persist throughout the maturation phase of the pollen and are considered to be either callose resulting from incomplete digestion of the initial wall, or some other polysaccharide material which is unevenly laid down along the wall and concentrated at the junction with the intine. In pollen induced into embryogenesis by anther culture, wall material is also distributed irregularly around the detached cell in a series of discrete zones, but these are more extensive than in vivo, closer together and in many instances highly dilated. The wall profiles thus have a beaded appearance, the 'beads' being connected together by short links of the 2 apposed plasmalemmae. The contents of the swollen zones have a similar electron density to that of the matrix in vivo but also show traces of a fibrillar component. It is postulated that this unusual swelling is a prelude to dispersal of the wall by disruption of the plasmalemmal links and to the establishment of cytoplasmic continuity between the 2 cells. The significance of such binucleate pollen grains in the formation of non-haploid embryos is discussed.  (+info)

Pollen ultrastructure in anther cultures of Datura innoxia. III. Incomplete microspore division. (8/2581)

During the microspore division in Datura innoxia, the mitotic spindle is oriented in planes both perpendicular (PE) and oblique (OB) to the spore wall against which the nucleus is situated. However, irrespective of polarity, the usual type of hemispherical wall is laid down at cytokinesis and isolates the generative cell from the rest of the pollen grain (type A). In PE spores the vegetative nucleus initially occupies a central position in the pollen grain, whereas in OB spores the vegetative nucleus lies at the periphery of the grain close to the generative cell. In anther cultures initiated just before the microspore division is due to take place, no marked change can be observed in either orientation or symmetry of the mitotic spindle when the spores divide. In some, however, cytokinesis is disrupted and deposition of the hemispherical wall arrested. In the absence of a complete wall, differentiation of the generative cell cannot take place and binucleate pollen grains are formed having 2 vegetative-type nuclei (type B). The 2 nuclei in the B pollens are always situated against the pollen-grain wall, suggesting that the disruption phenomenon is related to the OB spores. The incomplete wall always makes contact with the intine on the intine-side of the spindle. Wall material may be represented merely as short stubs projecting out from the intine into the cytoplasm, in which event the 2 nuclei lie close to each other and are separated by only a narrow zone of cytoplasm. In other grains the wall is partially developed between the nuclei and terminates at varying distances from the tonoplast; in these, the nuclei are separated by a wider zone of cytoplasm. The significance of these binucleate grains in pollen embryogenesis is discussed.  (+info)

Rhinitis, allergic, seasonal, is a type of inflammation of the nasal passages that occurs in response to exposure to allergens, such as pollen, mold spores, or dust mites, that are typically present in the environment during certain times of the year. It is also known as seasonal allergic rhinitis or hay fever. Symptoms of seasonal allergic rhinitis can include sneezing, runny nose, itchy or watery eyes, congestion, and postnasal drip. These symptoms are usually worse in the morning or after exposure to allergens and can be relieved with over-the-counter antihistamines or nasal decongestants. Seasonal allergic rhinitis is a common condition that affects millions of people worldwide. It is typically treated with avoidance of allergens, the use of medications to relieve symptoms, and immunotherapy (allergy shots) to reduce sensitivity to allergens over time.

Plant proteins are proteins that are derived from plants. They are an important source of dietary protein for many people and are a key component of a healthy diet. Plant proteins are found in a wide variety of plant-based foods, including legumes, nuts, seeds, grains, and vegetables. They are an important source of essential amino acids, which are the building blocks of proteins and are necessary for the growth and repair of tissues in the body. Plant proteins are also a good source of fiber, vitamins, and minerals, and are generally lower in saturated fat and cholesterol than animal-based proteins. In the medical field, plant proteins are often recommended as part of a healthy diet for people with certain medical conditions, such as heart disease, diabetes, and high blood pressure.

Immunoglobulin E (IgE) is a type of antibody that plays a key role in the immune system's response to allergens and parasites. It is produced by B cells in response to specific antigens, such as those found in pollen, dust mites, or certain foods. When an allergen enters the body, it triggers the production of IgE antibodies by B cells. These antibodies then bind to mast cells and basophils, which are immune cells that are involved in the inflammatory response. When the same allergen enters the body again, the IgE antibodies on the mast cells and basophils bind to the allergen and cause the release of histamine and other inflammatory chemicals. This leads to symptoms such as itching, swelling, and difficulty breathing. IgE is also involved in the immune response to parasites, such as worms. In this case, the IgE antibodies help to trap and kill the parasites by binding to them and marking them for destruction by other immune cells. Overall, IgE is an important part of the immune system's defense against allergens and parasites, but it can also contribute to allergic reactions and other inflammatory conditions when it binds to inappropriate antigens.

Arabidopsis Proteins refer to proteins that are encoded by genes in the genome of the plant species Arabidopsis thaliana. Arabidopsis is a small flowering plant that is widely used as a model organism in plant biology research due to its small size, short life cycle, and ease of genetic manipulation. Arabidopsis proteins have been extensively studied in the medical field due to their potential applications in drug discovery, disease diagnosis, and treatment. For example, some Arabidopsis proteins have been found to have anti-inflammatory, anti-cancer, and anti-viral properties, making them potential candidates for the development of new drugs. In addition, Arabidopsis proteins have been used as tools for studying human diseases. For instance, researchers have used Arabidopsis to study the molecular mechanisms underlying human diseases such as Alzheimer's, Parkinson's, and Huntington's disease. Overall, Arabidopsis proteins have become an important resource for medical research due to their potential applications in drug discovery and disease research.

Hypersensitivity is a medical term used to describe an exaggerated immune response to a substance that is normally harmless or even beneficial to the body. This response can occur in response to a variety of stimuli, including allergens, toxins, and medications. There are four main types of hypersensitivity reactions, each with its own specific characteristics and mechanisms: 1. Type I hypersensitivity (also known as immediate hypersensitivity) is an allergic reaction that occurs within minutes or hours of exposure to an allergen. It is mediated by IgE antibodies and involves the release of histamine and other inflammatory mediators from mast cells and basophils. 2. Type II hypersensitivity (also known as cytotoxic hypersensitivity) is an immune response that involves the destruction of cells by antibodies. It is typically seen in autoimmune diseases, where the immune system mistakenly attacks the body's own cells. 3. Type III hypersensitivity (also known as immune complex-mediated hypersensitivity) is an immune response that involves the formation of immune complexes, which can deposit in tissues and trigger inflammation. It is seen in conditions such as systemic lupus erythematosus and rheumatoid arthritis. 4. Type IV hypersensitivity (also known as delayed-type hypersensitivity) is an immune response that occurs over a period of days or weeks after exposure to an allergen or antigen. It involves the activation of T cells and the release of cytokines, which can cause inflammation and tissue damage. Overall, hypersensitivity reactions can range from mild to severe and can cause a wide range of symptoms, including itching, swelling, redness, and pain. Treatment typically involves avoiding the allergen or antigen that triggers the reaction, as well as medications to manage symptoms and reduce inflammation.

European Pollen Database Evolution of sex Honeybee starvation Pollen calendar Pollen count Pollen DNA barcoding Pollen source ... Sulcate pollen has a furrow across the middle of what was the outer face when the pollen grain was in its tetrad. If the pollen ... Pollen evidence can also reveal the season in which a particular object picked up the pollen. Pollen has been used to trace ... Pollen comes in many different shapes. Some pollen grains are based on geodesic polyhedra like a soccer ball. Triporate pollen ...
Pollen was a power pop band originally hailing from Pittsburgh, Pennsylvania. They released four albums and two split records ... Group Efforts from the Phoenix Archived 2013-10-16 at the Wayback Machine A Pollen Fan Site (Articles with hCards, Pages using ...
Pollen continued to advise the textile giant as a design consultant. In 1995, Pollen became a writer, working as Bella Pollen. ... Arabella Rosalind Hungerford Pollen, known as Bella Pollen, is the daughter of Peregrine Michael Hungerford Pollen, a former ... Arabella Pollen (born 22 June 1961) is an English fashion designer and, as Bella Pollen, journalist and author of five novels ... Pollen, Bella (11 May 2017). "My life in fashion: Bella Pollen". Financial Times. Retrieved 30 June 2021. Roger Tredre (20 May ...
... , also known as pollen robbery or floral larceny, occurs when an animal actively eats or collects pollen from a ... However pollen theft can also arise if pollen-collectors visit only male-phase (pollen-bearing) flowers of dichogamous species ... Few pollen-collecting animals are obligate pollen thieves. Rather pollen theft generally arises from a mismatch between the ... The clearest examples of pollen theft are when pollen-collecting insects visit only the male (pollen-bearing) plants of ...
Plate 45 Pollen 'Gunnery' p. 180 Pollen 'Gunnery' p. 173 Pollen 'Gunnery' pp. 231-249 Pollen 'Gunnery' pp. 146-149 Pollen ' ... Pollen 'Gunnery' p. 23 Pollen 'Gunnery' p. 35 Pollen 'Gunnery' p. 36 Pollen Aim Correction System. Part I. Technical History ... 151-155 Pollen 'Gunnery' pp. 159-162 Pollen 'Gunnery' pp. 203-212 Pollen 'Gunnery' pp. 215- 224 Massie 'Castles' pp. 741-742 ... Pollen had had a long relationship with Dreyer's predecessor, Lieutenant Harding. Pollen continued his work, with tests carried ...
Pollen married sculptor Nell Murphy in 1963, with the couple buying a house in Dublin in which Pollen had his studio. Murphy ... Pollen created the mosaic of St Joseph the Worker and windows for Galway Cathedral. In 1963 Pollen created a memorial window to ... Arthur Pollen was a sculptor of religious works, and grandson of John Hungerford Pollen. Daphne was the daughter of Cecil ... "Pollen, Patrick (Patrick Pollen metaphysician in glass)". Irish Arts Review 28 (2) p. 102 Jebb, Louis (30 December 2010). " ...
The mixing of the pollen with nectar or honey changes the color of the pollen. The color of the pollen can help identify the ... The pollen is transferred to the pollen comb on the hind legs and then combed, pressed, compacted, and transferred to the ... Either honey or nectar is used to moisten the dry pollen, producing the product known as bee pollen or bee bread. ... but is a dense mass of branched hairs into which pollen is pressed, with pollen grains held in place in the narrow spaces ...
"Pollen by Tennis Reviews and Tracks". Metacritic. Retrieved February 12, 2023. Sendra, Tim. "Tennis - Pollen Album Reviews, ... Pollen is the sixth studio album by the musical duo Tennis, released via their own label Mutually Detrimental on February 10, ... Pollen received a score of 82 out of 100 based on four critics' reviews on review aggregator Metacritic, indicating "universal ... Russell, Scott (November 15, 2022). "Tennis Announce New Album Pollen, Share Dreamy Lead Single 'One Night with the Valet'". ...
They carry pollen in their crops, and regurgitate it along with nectar when provisioning the cells of their nests, and they lay ... Pollen wasps, the Masarinae, are unusual wasps that are typically treated as a subfamily of Vespidae, but have in the past ... The Pollen Wasps: Ecology and Natural History of the Masarinae. Harvard University Press). Carpenter, J.M. 2001. Checklist of ... It is a small subfamily, unique among wasps in feeding their larvae exclusively with pollen and nectar, in a fashion quite ...
The pollen of such plants attracts and nourishes specialist pollen feeders that perform pollination, and many of those pollen ... Pollen beetle is an informal term for any species of beetle associated intimately with suitably pollen-rich species of flowers ... Species in at least sixteen families of the order Coleoptera could be counted as pollen beetles, and "pollen beetle" also is a ... Many insects of small to modest size benefit from feeding on pollen of suitable plants; pollen tends to be rich in protein, ...
On some accounts, Pollen's father helped to build the United States Capitol. A doctor, Pollen claimed to hold the MD degree, ... Hugh Pollen, Ringsend." D. Ruth Delany, The Grand Canal of Ireland (David & Charles, 1973): "Hugh Pollen died in 1837 and was ... The son of Hugh Pollen, a dock master, Pollen was born in Ringsend, Dublin. Little is known about the early part of his life, ... Pollen Island McLintock, A. H., ed. (22 April 2009) [1966]. "Pollen, Daniel (1813-96)". An Encyclopaedia of New Zealand. ...
Pollen was born on 8 January 1842 in Rotterdam, Netherlands. He had four siblings. His father M.P. Pollen (1806-1857) was owner ... Pollen's name is commemorated in the specific epithets of the Comoros olive pigeon (Columba pollenii ), the Pollen's vanga ( ... 255-266 (PDF, online). Entry for François Pollen at JSTOR Plant Science. Wikimedia Commons has media related to François Pollen ... Relation de voyage by François Pollen, Part 2. Mammifères et oiseaux by Hermann Schlegel and François Pollen, Part 3. Reptiles ...
... s are tolerant and even pollen damaged by X-rays and gamma rays can still grow pollen tubes. Pollen tube growth is ... Once the pollen grain is recognized and hydrated, the pollen grain germinates to grow a pollen tube. There is competition in ... Abdelgadir HA, Johnson SD, Van Staden J (2012-03-01). "Pollen viability, pollen germination and pollen tube growth in the ... outcrossed pollen grows and outcompetes self pollen. The interaction between the style and the pollen detects compatibility and ...
A pollen-presenter is an area on the tip of the style in flowers of plants of the family Proteaceae on which the anthers ... The systematic depositing of pollen on the tip of the style implies the plants have some strategy to avoid excessive self- ... To ensure pollination, the style grows during anthesis, sticking out the pollen-presenter prominently, and so ensuring that the ... P.F. Yeo (6 December 2012). Secondary Pollen Presentation: Form, Function and Evolution. Springer Science & Business Media. pp ...
Pollen is a 1995 science fiction novel written by British author Jeff Noon. Pollen is the sequel to Vurt and concerns the ... While working on Pollen, he often listened to 'Dream of a 100 Nations' album by Transglobal Underground on repeat. Things ... Pollen is a much more tangled book, more fertile, a very overgrown, edge-of-wilderness narrative. "John Barleycorn (Must Die ... Pollen title listing at the Internet Speculative Fiction Database v t e (Articles with short description, Short description is ...
Look up pollen in Wiktionary, the free dictionary. Pollen is a powdery substance in plant reproduction. Pollen may also refer ... Pollen Ndlanya, a retired South African football player Pollen (band), an American power pop band Pollen (novel), a 1995 ... a writer on naval affairs Daniel Pollen, the ninth Premier of New Zealand Francis Pollen, English architect Geir Pollen, a ... a 2023 album by musical duo Tennis Pollen (video game), a sci-fi video game Pet pollen, or dander, material shed from the body ...
A pollen core is a core sample of a medium containing a stratigraphic sequence of pollen. Analysis of the type and frequency of ... Degradation of the pollen exine and bioturbation may reduce the quality of the pollen grains and stratigraphy of the core so ... The cores are then subjected to pollen analysis by palynologists who are able to infer the proportions of major plant types ... Cores are obtained from deposits where pollen is likely to have been trapped. Cores are generally obtained from lacustrine ...
A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen ... Daily pollen reports in the US Daily pollen reports in the UK Daily and historical pollen counts US (Articles with short ... The number of pollen grains in a given volume of air can then be calculated by entering the pollen counts into a mathematical ... The National Pollen and Aerobiology Research Unit became the world's first pollen forecasting service in 1983. According to a ...
... (Xenopirostris polleni) is a species of bird in the family Vangidae. It is endemic to eastern Madagascar. Its ...
... (born 4 April 1953 in Målselv) is a Norwegian poet, novelist and translator. His literary debut was the poetry ... "Geir Pollen". Store norske leksikon (in Norwegian). Oslo: Kunnskapsforlaget. Retrieved 7 March 2010. v t e v t e (CS1 Norwegian ...
"POLLEN DUMİSANİ NDHLANYA". TFF. Retrieved 9 June 2009. Potter Ndlanya - FIFA competition record (archived) Pollen Ndlanya at ... Pollen Ndlanya (born 22 May 1970 in Daveyton) is a retired South African footballer who played as a striker. He played for ... He also hosts the Pollen Festive Games annually. "SowetanLIVE". Archived from the original on 7 January ...
... may refer to: Structures in plants that hold pollen Bee pollen, sacs or balls of pollen packed by bees This ... disambiguation page lists articles associated with the title Pollen sac. If an internal link led you here, you may wish to ...
Corn pollen is particularly prone to pollen drift. Corn plants release their pollen for around a week, and an entire field may ... Each individual plant can produce 4 to 5 million individual pollen grains. Its pollen is among the largest particles that can ... pollen release usually shows a spike two to three days after half the plants have released their pollen. ... Pollen drift can be avoided by careful examination of the geography of the area where the crop is to be grown combined with the ...
Pollen was born to Walter Michael Hungerford Pollen, a steel industrialist, and Rosalind Frances Pollen née Benson, the ... Pollen died on 18 February 2020. "Peregrine Pollen obituary". The Times. ISSN 0140-0460. Retrieved 26 March 2020. "Peregrine ... Pollen first began working for Sotheby's in 1957, rising to become an aide to the company's chairman, Peter Wilson, before he ... Pollen later had a caique from South America named Papagoya that accompanied him around the city and was reportedly addicted to ...
Pollen ran unsuccessfully as the British Columbia Social Credit Party candidate in the 1968 by-election in Oak Bay. From 1985 ... Peter Pollen (October 26, 1927 - January 3, 2017) was a Canadian politician from British Columbia who was the mayor of Victoria ... Pollen's still on road less travelled: [Final Edition] Gibson, JimView Profile. Times - Colonist [Victoria, B.C] 28 Apr 2002: ... "Victoria skyline Pollen's legacy". Victoria News. April 8, 2011. Retrieved 2017-01-04. Média, Bell (January 4, 2017). "Peter ...
His son, John Pollen I, grandson, John Pollen II (c. 1642 - by November 1719), and great-grandson, John Pollen III (c. 1702 - ... The heir-in-line is William Pollen's only son, Zach William Hungerford Pollen (born 2010). John Hungerford Pollen (senior) ( ... Sir John Pollen, 1st Baronet (c. 1731-1814) John Walter Pollen, 2nd Baronet (1784-1863), MP for Andover 1820-1821 and 1835-1841 ... He was only son of Lt-Cdr John Francis Hungerford Pollen, RN, eldest son of Capt Francis Gabriel Hungerford Pollen, CBE, RN ( ...
A pollen calendar is used to show the peak pollen times for different types of plant pollen, which causes allergic reactions in ... United States pollen calendars (Does not lead to any pollen calendars) Pollen calendar for the UK created by the National ... The use of pollen for criminal investigation purposes is called "forensic palynology". However, the use of a pollen calendar to ... "Pollen Calendar". National Pollen and Aerobiology Research Unit (UK). Archived from the original on May 16, 2008. E. Montali, A ...
... s are a system of subdividing the Last Glacial Period and Holocene paleoclimate using the data from pollen cores. ... By analysing pollen in core samples taken from peat bogs, von Post noticed that different plant species were represented in ... At present nine main pollen zones, I-IX, are defined, based on the work of J. Iversen, published in 1954. These are matched to ... It is acceptable, for example, to refer to the "Younger Dryas" of Antarctica, which has no pollen of its own. A few scientists ...
... is stored in brood cells, mixed with saliva, and sealed with a drop of honey. Bee pollen is harvested as food for ... Foraging bees bring pollen back to the hive, where they pass it off to other worker bees, who pack the pollen into cells with ... Bee pollen, also known as bee bread and ambrosia, is a ball or pellet of field-gathered flower pollen packed by worker ... Bee pollen is the primary source of protein for the hive. Bees other than Apis typically form pollen into balls; these are ...
Pollen died on 4 November 1987. Alan Powers, 'Pollen, Francis Anthony Baring (1926-1987)', Oxford Dictionary of National ... Pollen is regarded as one of the key British architects of the Roman Catholic Liturgical Movement in the UK that resulted in a ... Francis Anthony Baring Pollen, FRIBA (7 December 1926 - 4 November 1987) was an English architect who designed, amongst other ... A group of architects that included Gillespie, Kidd & Coia, Gerard Goalen, Desmond Williams, Austin Winkley and Pollen utilised ...
Pollen grains are tiny "seeds" dispersed from flowering plants, trees, grass, and weeds. The amount and type of pollen in the ... Higher pollen concentrations and longer pollen seasons can also make you more sensitive to allergens. This can trigger asthma ... People with respiratory illnesses like asthma may be more sensitive to pollen. Exposure to pollen has been linked to asthma ... Climate change will potentially lead to both higher pollen concentrations and longer pollen seasons, causing more people to ...
Bee pollen is flower pollen that collects on bees, which can be different for different flowers. It can also include some ... Bee Pollen Extract, Buckwheat Pollen, Extrait de Pollen dAbeille, Honeybee Pollen, Honey Bee Pollen, Maize Pollen, Pine Pollen ... Polen de Abeja, Pollen, Pollen dAbeille, Pollen dAbeille de Miel, Pollen de Sarrasin.. ... Pollen allergy: Bee pollen can cause serious allergic reactions in people who are allergic to certain types of pollen. Symptoms ...
... pollen count and pollution map from Weather Underground. ... Pollen and Air Quality forecast for Madisonville, LA with air ... Madisonville, LA Air Quality & Pollenstar_ratehome. 72 °F. Madisonville Station,Report. Report Station ...
Ragweed pollen makes your allergies bloom? Dont spend your day suffering and be prepared. Get your local ragweed pollen ... However, ragweed pollen can be carried hundreds of miles. Allergy symptoms are usually felt from mid-summer to early fall, ... The risk for ragweed pollen symptoms is very high. Consider covering your eyes with sunglasses and wearing a hat when spending ... The risk for ragweed pollen symptoms is extremely high. Take any allergy medication at least two hours before spending time ...
Tag: pollen Peloton snot rocket. Richard MasonerApril 8, 2010Leave a Comment The Weather Channel "Pollen Hot Spot" puts Santa ...
They had a positive skin reaction (a wheal greater than 5 mm) to timothy grass-pollen extract and a poor response to oral ... These patients received a regular series of depot grass-pollen injections over a three-year period. At the end of this first ... Long-term clinical efficacy of grass-pollen immunotherapy. N Engl J Med. August 12, 1999;341:468-75. ... This group was then randomized to continue monthly injections of grass-pollen extract for three more years or receive placebo ...
"The polar vortex will likely cause a pollen vortex," he said in the statement, "with mold, tree and even grass pollens ... Polar Vortex Soon to be Replaced By "Pollen Vortex" "Chicagoans who suffer from mold and tree allergies will be down for the ... "Last year at this time, we reported three times the tree pollen due to the early spring warm up," said Leija, who is predicting ... According to a local allergy specialist, its because the polar vortex is about to be replaced with a "pollen vortex.". Along ...
Remove the pollen from the anthers and freeze only the pollen. Will the , pollen alone tolerate thawing and freezing better ... Any suggestions on storing pollen?. Dennis Kramb [email protected]. Fri, 13 May 2016 09:40:27 PDT*Previous message: Any ... i never thaw pollen i wont use that day. Dennis in Cincinnati On May 13, 2016 12:35 PM, Michael Mace ,[email protected] ... If I want to make the widest range of , crosses, I need to store pollen from the early ones to use on the later , ones. The way ...
Professional features of Bee Pollen can be found at StockFood, the agency for food photography - finished features including ...
Doubting the Pollen Evidence. Date: September 13, 2015Author: Dan "… data concerning pollen grains should not be used in Shroud ... The comment that pollen cannot be identified at species level seems peculiar. One might expect that the DNA of pollen grains ... A paper from the Valencia conference, The question of pollen grains on the Shroud of Turin and the Sudarium of Oviedo, by ... We have discussed the pollen many times in this blog*. The subject came up again recently in some comments to the posting, New ...
To remove lily pollen stains from clothing DO NOT WASH!

Rather, brush off excess pollen and... ... Remove lily pollen easy with sellotape... Share on Facebook: On Twitter: Tweet this! Reply to How To Remove Lily Pollen. ... How To Remove Lily Pollen. Cleaning : Useful Cleaning Tips. To remove lily pollen stains from clothing DO NOT WASH!. Rather, ... if you have washed the garment with pollen on are there any more tips for removi.... - Fri, Jan 30th 2004. Ask question. More ...
Pollen images. This page displays a low-resolution inlined image of Linum catharticum pollen. Select from the options below for ...
High Desert Bee Pollen Granules information including description from CC Pollen, supplement facts, and suggested use. Order ... High Desert Bee Pollen Granules Description from CC Pollen High Desert Bee Pollen is a blend of Domestic & European Bee Pollen ... High Desert Bee Pollen Granules Overview Bee pollen is rich in nutrients that support overall health and well-being. Three of ... All other bee pollen Ive found is dried and tastes horrible. Im very thankful to find this wonderful fresh pollen. Order it for ...
Sen4Pol Phase 1. NDVI-based method for daily birch pollen prediction from Sentinel-3. Trier, Øivind Due ... and Allergy Alert are registered trademarks of IQVIA. Page last modified: 09/21/2023 ...
To make the gel, they removed sticky, oil-based pollen cement from the flowers and incubated the pollen in an alkaline solution ... Sciences latest mash-ups: pollen-powered muscles, batteries built with salmon sperm, and a golden tongue by Alex Scott June 11 ... Theyve created a form of paper from pollen that they say could be used to make soft robots or artificial muscles (Proc. Natl. ... In this way, a pollen-paper muscle could be made to contract and relax using cycles of exposure to water vapor followed by a ...
... ... The Possible Pollen Cone of the Late Triassic Conifer Heidiphyllum/Telemachus (Voltziales) From Antarctica. Antarctic Science ... In this contribution we describe the first compression material of a voltzialean pollen cone from Upper Triassic strata of the ... Seed cones assigned to Telemachus have become increasingly well understood in recent decades, but the pollen cones belonging to ...
Packed with B vitamins, minerals, free forming amino acids, and protein, bee pollen is the perfect dose of clean energy for ... Beekeepers Naturals Bee Pollen. Regular price $23.99 Sale Meet natures multivitamin. Packed with B vitamins, minerals, free ... forming amino acids, and protein, bee pollen is the perfect dose of clean energy for active humans. ...
We compared weekly Twitter trends with National Allergy Bureau weekly pollen counts derived from US stations, and found a high ... Longitude and latitude of the pollen stations affected the strength of the correlation. Twitter and other social networks may ... Pollen forecasts are in use everywhere to inform therapeutic decisions for patients with allergic rhinoconjunctivitis (ARC). We ... correlation of the sum of the total pollen counts from each stations with tweets reporting ARC symptoms (Pearsons correlation ...
The first pollen bomb of the year arrived this month and many people are struggling with hay fever. ... Pollen bomb: 8 useful ways Lancashire hay fever sufferers can ease symptoms at night. The first pollen bomb of the year arrived ... The sun has finally arrived in Lancashire, but it has brought with it a massive release of pollen, known as a pollen bomb, ... As well as pollen, one of the main causes of an allergy reaction is dust. So, with that in mind, you need to keep on top of ...
Microorganisms associated with pollen, honey, and brood provisions in the nest of a stingless bee, Melipona fasciata Apidologie ... Microbiology of pollen and bee bread : taxonomy and enzymology of molds Apidologie 20, 53-68 (1989). ... MICROBIOLOGY OF POLLEN AND BEE BREAD : THE YEASTS Apidologie 10, 43-53 (1979). ... BIOCHEMISTRY AND MICROBIOLOGY OF POLLEN COLLECTED BY HONEY BEES (APIS MELLIFERA L.) FROM ALMOND, PRUNUS DULCIS. II. PROTEIN, ...
From: CC Pollen Company. Item Code: CJ0025. Our Price: $14.50, 2/$28.13. As low as: $14.06 per unit Please call for deeper ... CC Pollen Company - High Desert Royal Jelly 1 g - 60 Capsules. Our Price: $15.69, 2/$30.44, 6/$89.43. ... You are Currently Viewing High Desert Royal Jelly 1 g, 60 Tablets, CC Pollen Company. Look for Similar Products by Category:. ... CC Pollen Royal Jelly. The Queen bee can live up to 40 times longer than the typical bee solely due to her diet of Royal Jelly ...
Allergy Tracker gives pollen forecast, mould count, information and forecasts using weather conditions historical data and ... Pollen Breakdown covers specific pollens like ragweed, while Todays Pollen Count tracks ALL pollen. The 15 Day forecast covers ... Pollen Breakdown. Do you know which kinds of pollen aggravate your symptoms? Here is the 3 day outlook for the worst offenders. ... Minimise indoor pollenKeep your windows shut and use your AC or a HEPA purifier to filter allergens. ...
Queensland allergy expert welcomes next gen pollen monitoring. Posted on Nov 8 2022. By Dow Jaemjamrat asthma, AusPollen ...
... Its not enough to be an environmentalist. We must be anti-racist environmentalists. Racism and climate change ...
Pollen. Posted on November 15, 2021 by Stevenadmin Vitamins that are part of the preparation, broaden the range of ... Dominant in the pollen of rutin and quercetin enhance the elasticity of blood capillaries and their permeability. Vitamin C ... pharmacological activity "VAZAVITAL." Pollen has protivoskleroticheskim effect, reduces the amount of cholesterol in the blood ...
Kiwi Pollen of Te Puke has appointed Monica Roach as its Chief Executive Officer. Monica is taking over from her parents Jill ... Hamlyn and Graeme Crawshaw after their 34 years with New Zealands first commercial kiwifruit pollen company. While Jill and ...
... A blog for achoo! and all things sneezy, wheezy, dusty, pollen ... Her book, Achoo! Why Pollen Counts, is perfect with spring right around the corner. One of our student reviewers gave it 5 out ... Shennen Bersani, author and illustrator of Achoo! Why Pollen Counts; the illustrator of 31 childrens picture books. ... "It is a fantastic multi-purpose book that is perfect for anyone who enjoys nature or wants to know more about pollen." -----. ...
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you. ...
Jordan 1 Pollen BMF Bunny Long Sleeve Vintage Wash Heavyweight T-Shirt $46 ...
  • Despite the importance of pollination, for many years research has been limited as there is no efficient way to study pollen distribution or track individual pollen grains. (
  • The quantum dots were equipped with lipophilic (fat-loving) ligands to allow them to stick to the fatty outer layer of pollen grains. (
  • Bee was caught after it visited a flower of which the pollen grains were labelled with quantum dots. (
  • After successfully labelling the pollen, the next step was to design a cheap and effective method to view the fluorescent pollen grains under a field dissection microscope. (
  • The method has proven to be successful in tracking individual pollen grains so far, despite the meticulous pollen counting work that is required. (
  • data concerning pollen grains should not be used in Shroud research. (
  • A paper from the Valencia conference, The question of pollen grains on the Shroud of Turin and the Sudarium of Oviedo , by Emanuela Marinelli, came up in the discussion. (
  • In subsequent analyses of dust samples it was possible to find and classify a large number of pollen grains which, properly treated, have allowed the precise determination of the family, genus and species of the plant itself. (
  • He examined 165 pollen grains, of which 45 (27.3%) were Gundelia tournefortii. (
  • Prof. Litt concluded that none of the pollen grains he saw could be named at a species level. (
  • Hence, all the conclusions drawn from previous palynological investigations of Dr. Frei's material should be suspended until a new collection of pollen grains can be carried out and the grains thus obtained can be studied with modern equipment and by an expert of pollen of this area. (
  • Since writing [Prof. Litt's] conclusions in 2001 no pollen grains have been collected and investigated as he suggested, so the data concerning pollen grains should not be used in Shroud research. (
  • In order for pollination to occur, pollen grains must be transferred from the anther to the female stigma of another plant. (
  • They have found fossilised grains of pollen that provide us with answers to what happened to plant life at the time of the extinction of the dinosaurs. (
  • Looking at variations in pollen grains is therefore a good way to study how plant life changed after the asteroid impact. (
  • Some pollen grains look the same as their modern equivalents, and sometimes the researchers are lucky enough to find a fossilised flower with its pollen - this makes it possible to identify more specifically what plant the pollen is from. (
  • The surface of pollen grains is reinforced by pollen wall components produced noncell autonomously by tapetum cells that surround developing pollen within the male floral organ, the anther. (
  • Coordination of tapetum activity with pollen grain development depends on the action of subtilases, including AtSBT5.4, which are produced stage specifically by developing pollen grains . (
  • Climate change will potentially lead to both higher pollen concentrations and longer pollen seasons, causing more people to suffer more health effects from pollen and other allergens. (
  • Hay fever, also known as allergic rhinitis, occurs when allergens like pollen enter your body and your immune system mistakenly identifies them as a threat. (
  • Allergic conjunctivitis is the inflammation of the lining of the eye (conjunctiva) due to exposure to allergens like those in pollen. (
  • Higher pollen concentrations and longer pollen seasons can also make you more sensitive to allergens. (
  • Pollen is one of the most common allergens in the United States. (
  • Grasses mix (51.4% of patients), thistleweed (46.9%) and olive tree (45.3%) pollens were the most common allergens in this group of patients (all seasonal). (
  • Allergic Rhinitis Allergic rhinitis is seasonal or perennial itching, sneezing, rhinorrhea, nasal congestion, and sometimes conjunctivitis, caused by exposure to pollens or other allergens. (
  • Pollen is an airborne allergen that can affect our health. (
  • The Washington Manual , (
  • Vallerand AHA, Sanoski CAC, Quiring CC. Mixed pollens allergen extract. (
  • The most common allergen is pollen, and pollen causes the most common allergy, known as "hay fever. (
  • This is also why hazel pollen has been calculated since 2023. (
  • Since 2023, the official pollen measurement network of MeteoSwiss consists of automatic measuring devices that can measure pollen in real time. (
  • Each microscopic grain of pollen contains proteins that can cause allergic reactions when breathed in. (
  • The process whose specific outcome is the progression of the pollen grain over time, from its formation to the mature structure. (
  • The nucleus of each microspore then divides by mitosis to form a two-celled organism, the pollen grain, that contains a tube cell as well as a smaller generative cell. (
  • The pollen grain is surrounded by an elaborate cell wall. (
  • In most flowering plants, however this division takes place later, in the tube that develops when a pollen grain germinates. (
  • Pollen grain coats from the end of the dinosaur era. (
  • Only the outer shell of the pollen grain is preserved in the rock, but that is sufficient to be able to identify what type of plant the pollen came from - whether a flowering plant or a coniferous tree. (
  • Next, you need to regularly clean your car's fuel injection system to remove pine pollen or any particulate build-up. (
  • The official count for the first day of the season was "Trees Low and Mold Low," and while Monday's count, which is seeing mainly oak and maple pollen, was an improvement from a year ago, things will be changing for the worse as soon as warm weather takes hold, he said. (
  • The polar vortex will likely cause a pollen vortex," he said in the statement, "with mold, tree and even grass pollens happening simultaneously due to the final break in the weather and all the nourishing moisture. (
  • Allergies occur when harmless water-soluble proteins released by pollen enter the mucous membranes of the eyes, nose, and mouth. (
  • Oral allergy syndrome (pollen food allergy syndrome) is caused by proteins in pollens and foods that cross-react (frequently raw fruits and vegetables and nuts). (
  • She says she's been seeing earlier peaks of tree pollen and longer grass pollen seasons in recent years. (
  • Last year at this time, we reported three times the tree pollen due to the early spring warm up," said Leija, who is predicting a bad allergy season. (
  • For the more than 26 million Americans who suffer from allergic rhinitis including pollen allergies, however, this season can be full of misery. (
  • Pollen exposure can trigger various allergic reactions, including symptoms of hay fever. (
  • Pollen exposure can also trigger symptoms of allergic conjunctivitis. (
  • Münstedt K, Voss B, Kullmer U, Schneider U, Hübner J. Bee pollen and honey for the alleviation of hot flushes and other menopausal symptoms in breast cancer patients. (
  • The risk for ragweed pollen symptoms is extremely high. (
  • The risk for ragweed pollen symptoms is moderate. (
  • Pollen forecasts are an important tool for those suffering from allergies, allowing them to minimise the symptoms of their allergy, plan outdoor activities and take their medication in a more targeted manner. (
  • Pollen allergy symptoms typically flare up when it is hot, dry, and windy out. (
  • Symptoms of a pollen allergy vary from person to person. (
  • People suffering from allergies can also better coordinate their holidays and holiday destination with the blooming period for the allergenic pollen types. (
  • While pollen allergies might appear to be the unavoidable cost of living with flowering plants, the suffering engendered by pollen allergies is largely our own creation. (
  • Reducing much of the human suffering caused by pollen allergies simply requires removing certain allergenic plants from cities and replacing them with less allergenic species near where we live and work. (
  • Several cities already regulate allergenic plants, but government can do more to reduce pollen allergies. (
  • If you're susceptible to allergies, your immune system mistakes pollen for invading germs. (
  • Many people wonder if pollen allergies are genetic. (
  • It is possible for adults to develop allergies to pollen and other triggers even into middle age. (
  • Once you reach middle age, however, your chance of developing allergies to pollen decreases. (
  • In order to protect the polyphenols, the saffron pollen extract was microencapsulated by the spray drying method with maltodextrin as a carrier. (
  • The results showed that the total polyphenol content of saffron pollen extract was found to be 620 ± 4.50, 470 ± 2.65, 420 ± 2.18 mg gallic acid per g, for 140, 160 and 180 , respectively and spraying drying could significantly maintain the polyphenolic content as well as the antioxidant capacity of extracts. (
  • The IC50 results for saffron pollen extract was found to be 0.177 ± 0.08, 0.191 ± 0.09, 0.182 ± 0.08 g per 100 g, for 140, 160 and 180 , respectively. (
  • Though pollen counts are typically higher during the warmer seasons, some plants pollinate year-round. (
  • Changes in patterns of outdoor aeroallergens caused by increasing temperatures and amounts of carbon dioxide in the atmosphere are major factors linked to increased duration of pollen seasons, increased pollen production, and possibly increased allergenicity of pollen. (
  • Longer warm seasons mean longer pollen seasons. (
  • From 1995 to 2011, pollen seasons lasted two weeks longer in some northern cities. (
  • Sample preparation: double sided tape on microscope slide used to hold down pollen touched on slide from a stamen. (
  • Objects as small as pollen must then be studied under a scanning electron microscope. (
  • The maps show the concentrations of hazel, alder, birch, grasses and ragweed pollen according to the season (approx. (
  • The COSMO pollen module calculates the pollen concentrations of hazel, alder, birche, grasses and ragweed. (
  • The main culprits tend to be grasses , trees , and weeds , which have pollen that is small, light, and dry and therefore easily dispersed by the wind. (
  • With insects facing rapid global decline, it is crucial that we understand which insects are important pollinators of different plants - this starts with tracking pollen,' said Dr Corneile Minnaar, Postdoctoral Fellow at Stellenbosch and first author of the study. (
  • I've done studies where I caught the insects after they have visited the plant with quantum-dot labelled anthers, and you can see where the pollen is placed, and which insects actually carry more or less pollen. (
  • By contrast, plants with brightly colored flowers (such as roses) have large, waxy pollen that's transported between plants by bees and other pollinating insects. (
  • In the rock, individual fossils of leaves, flowers, insects and large quantities of microfossils such as pollen have been preserved. (
  • This is pollen that attaches to insects and is spread by them. (
  • By studying pollen we can therefore see that the asteroid impact 66 million years ago not only affected dinosaurs and plants, but also insects. (
  • Bee pollen might help stimulate the immune system, but it's not clear how bee pollen causes these effects. (
  • Pollen is nature's way of propagating, but it is also the main culprit that can give car owners a major headache-and that is a car covered in pollen. (
  • Perhaps some of you have frozen pollen that you would exchange for some of the seeds, if the pollination takes? (
  • They show the average pollen concentrations [pollen per m3] over an area of 1.2 km2. (
  • Below we have outlined the easiest ways to eliminate pesky pollen particles from your car and maintain your vehicle's showroom glow. (
  • The best way to remove pollen particles from your car's exterior is by washing. (
  • You don't need a special pollen remover, just use good car soap and a pressure spray to knock off stubborn pollen particles that can get stuck to the car's surface. (
  • Without washing regularly, pollen particles can build up in the wiper blades. (
  • Your car's interior can be as susceptible to pollen particles as the outside. (
  • Larger or more coarse particles, including dust and pollen are more restricted to the thoracic cavity and unable to penetrate the smaller airway systems. (
  • Bee pollens come from many different plants, so the contents of bee pollen can vary significantly. (
  • During the spring, summer, and fall, plants release pollen (a fine powder that is carried by the wind from plant to plant in order to fertilize them). (
  • The pollen concentration is largely determined by the abundance of flowering plants, the weather and the conditions for pollen transport. (
  • Plants will always flower, but people have built a world that increases the harm we suffer from pollen. (
  • Our pollen archive shows us that some plants survived the disaster, but also that many were wiped out. (
  • Exposure to pollen has been linked to asthma attacks and increases in hospital admissions for respiratory illness. (
  • Now we're really keen on going back after reading yesterday's article in The Atlantic on growing and harvesting your own fennel pollen and seeds. (
  • Most people are familiar with the plant's bulb and seeds, but the flowers are also edible and the pollen is a magical, aromatic spice. (
  • With these five species, the most important species are covered throughout the entire pollen season, as they bloom one after another over the course of the year. (
  • MeteoSwiss is now expanding this system and investing in development work concerning the calculation of the pollen count, for example to improve the quality of the pollen counts for the existing species or to introduce additional pollen species that are important for allergy sufferers. (
  • It is not true that pollen is classifiable at species level even today, and was even less so 40 years ago. (
  • For narrow valleys such as the Lauterbrunnental (Fr: Val d'Hérens, It: Val Verzasca), however, the resolution of 1.1 km is still too coarse for a local pollen forecast. (
  • Rather, brush off excess pollen and hang garment outdoors in direct sunlight for a few hours and the stain will disappear! (
  • Since pollen is small, dry, and lightweight, it can easily become airborne and be spread over long distances by wind. (
  • The scientists are already using the methodology for finding new information about the distribution of pollen. (
  • Bee pollen is flower pollen that's collected by worker bees, mixed with nectar and bee saliva, and then packed into honeycomb cells in the hive. (
  • Pollen forecast with COSMO-ART - how should the maps be interpreted? (
  • The numerical weather forecast model used by MeteoSwiss, COSMO, can model the pollen count with the ART pollen module. (
  • This makes it possible to correct the COSMO pollen forecast at regular intervals with the real-time data and thus improve it. (
  • The amount and type of pollen in the air depends on the season and geographic region. (
  • During the pollen season, MeteoSwiss publishes text forecasts and pollen count maps that are updated daily. (
  • This handy step-by-step guide will help keep your vehicle in tip-top shape, especially during the challenging pollen season. (
  • Professional car washers can apply a shine protectant so you're prepared for the incoming pollen season. (
  • A layer of waterproof sealant can last for four months, helping you through the pollen season. (
  • When is pollen season? (
  • Pollen season reaches its peak during spring but can begin as early as February and can last until early summer in June. (
  • Then wash a car to clean all your exterior, along with gaskets, jams, and caps that might have pollen. (
  • Set the hose aside and add a car wash soap for pollen to a water-filled bucket. (
  • People take bee pollen for athletic performance, hay fever, eczema, constipation, obesity, and many other conditions, but there is no good scientific evidence to support these uses. (
  • People with respiratory illnesses like asthma may be more sensitive to pollen. (
  • There is also no good evidence to support using bee pollen for COVID-19. (
  • This is followed by the calculation of the pollen emissions, which is greatly dependent on the current weather: High temperatures, dry conditions and a little wind generally favour pollen release. (
  • Bee pollen can cause serious allergic reactions in people who are allergic to certain types of pollen. (
  • Three concentrically organized cell types, therefore, cooperate to coordinate pollen wall deposition through a multilateral molecular dialogue. (
  • Daily pollen count can be accessed on Twitter, online at or by calling (866) 476-5536. (
  • Researchers at Stellenbosch University in South Africa have found a way to track pollen using quantum dots, developing a simple and cost-effective method for studying pollen distribution. (
  • Pollen can enter through your car's ventilation system or every time you open your windows. (
  • However, if you live in an area with a high pollen level, consider cleaning your air filters every spring. (
  • This seemingly annoying reaction helps physically expel the pollen from your system, and it also serves as a red flag to tell you there is a high pollen count and you should leave the area if possible. (
  • This simple act can shield your car from the everyday pollen fallout, especially during early mornings when pollen usually forms. (
  • Naseri L, Khazaei MR, Khazaei M. Potential therapeutic effect of bee pollen and metformin combination on testosterone and estradiol levels, apoptotic markers and total antioxidant capacity in a rat model of polycystic ovary syndrome. (
  • This enables the public to obtain information on pollen levels for every location in Switzerland. (