| [effects of global climate change on japanese cedar pollen concentration in air--estimated results obtained from yamagata city and its surrounding area]. | the effects of global warming on japanese cedar pollen concentration in air were examined. there was a significant increase in total pollen count in years where small or average values of pollen dispersion were observed and where summertime temperatures were postulated to have risen from 2 to 5 degrees c. there were no remarkable differences in total pollen count in years where large values of pollen dispersion were observed. on the other hand, a drastic decrease in total pollen count was expect ... | 1996 | 9133338 |
| [hourly variations in the dispersion of japanese cedar (cryptomeria japonica) pollens in the yamagata basin and the effect of cold and warm fronts on the pollen counts]. | airborne pollen counts of cryptomeria japonica (cj) were investigated at three points in the yamagata basin: 1. the central part of yamagata city (point a), 2. at the foot of a mountain with a cj grove (point b), 3. within the cj grove (point c). at the beginning of the cj pollen season, the airborne pollen counts at point b showed higher values than those at point a, whereas the relation of the count values was reversed later at the major pollen dispersion period. numerous airborne pollens were ... | 1989 | 2589976 |
| existence of exine-free airborne allergen particles of japanese cedar (cryptomeria japonica) pollen. | we investigated whether exine-free pollen allergen particles exist together with the intact pollen grains of japanese cedar (cryptomeria japonica) in the air during the pollen season in yamagata city. first, we separated the allergen particles in an andersen multi-stage air-sampler according to their aerodynamic diameters. the amount of major allergen (cry j i) on each stage of the sampler was determined by a sensitive fluorometric sandwich elisa, and the pollen count of the same samples was don ... | 1991 | 1789400 |