نتایج جستجو برای: pollen weight
تعداد نتایج: 369816 فیلتر نتایج به سال:
Abstract In eusocial honey bees, Apis mellifera , diet, gut microbiota and nestmates can all contribute to the health of freshly emerged individual workers, but their relative importance for longevity body weight is currently unknown. Here, we show that diet most relevant, followed by presence nestmates. Freshly workers were randomly assigned eight treatments (with or without honey/pollen, prot...
Citrus species are classified as a sensitive group of trees to salt stress, but the levels of their sensitivity or tolerance to salt are different among cultivars. In order to evaluate the effects of salinity stress on pollen germination of some citrus cultivars, an experiment was performed in factorial, based on completely randomized design in three replications with Cleopatra mandarin (Citrus...
Airborne olive pollen counts are not representative of exposure to the major olive allergen Ole e 1.
Pollen is routinely monitored, but it is unknown whether pollen counts represent allergen exposure. We therefore simultaneously determined olive pollen and Ole e 1 in ambient air in Córdoba, Spain, and Évora, Portugal, using Hirst-type traps for pollen and high-volume cascade impactors for allergen. Pollen from different days released 12-fold different amounts of Ole e 1 per pollen (both locati...
abstract background: bee-collected pollen and propolis are apicultural products which are recognized as a well balanced food. these beehive products are composed of nutritionally valuable substances and contain considerable amounts of polyphenol substances which may have several useful pharmacological properties. methods: the protective activity of bee-collected pollen (bpe) and water-soluble d...
Results of preliminary pollen analyses of 280 samples from selected intervals of cores from Hole 798 on the Oki Ridge in the Sea of Japan (Sections 798A-1H-1 through 798A-3H-3,798B-1H, 798B-13H1 through 798B-15H-8, and 798C-1H-1 through 798C-1H-3) indicate that (1) diagnostic pollen types of the vegetation of Japan are abundant and well-preserved in sediments deposited over the last 1.4 m.y.; (...
BACKGROUND Pollen are monitored in Europe by a network of about 400 pollen traps, all operated manually. To date, automated pollen monitoring has only been feasible in areas with limited variability in pollen species. There is a need for rapid reporting of airborne pollen as well as for alleviating the workload of manual operation. We report our experience with a fully automated, image recognit...
incompatibility in hazelnut (c. avellana l.) is the sporophytic type and under the control of a single s-locus with multiple alleles. compatibility of pollen-stigma in hazelnut is an important consideration in planning crosses in breeding program and in choosing pollinizers for orchard planting. in this study, fluorescence microscopy was used to determination of s-alleles and compatibility rela...
background: the cultivation of saffron is expanding through the southeast of iran, and allergy to saffron pollen occurs in workers involved in processing this plant. we aimed to clone, sequence and express a major allergen involved in saffron pollen allergy, and to compare the recombinant with the natural allergen. methods: the n-terminal amino acid sequence of cro s 1, an allergen from saffron...
weed pollen grains belonging to the asteraceae family contain a variety of allergens inducing type i and iv allergies in susceptible people. the aim of this research was to compare the allergenic properties of immature and mature shasta daisy pollen grains (chrysanthemum maximum ramond) to define the potential role of the maturation process on the allergenicity of asteraceae pol...
air pollutants are reported to increase the specific ige response to allergens. to study allergen proteins and determine the effect of air pollutants on the allergenic potential of pollen extracts, the extracts were injected intraperitoneally and subcutaneously in guinea pigs. the results were analyzed by skin prick test (spt), elisa and sds-page followed by immunoblotting. the pollen extract o...
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