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J Morales

Publications and source records attributed to J Morales.

202 records · Page 12Linked to original sources
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[Brain stem auditory evoked responses in rats. Effects of the development, stimulation rate and electrode placement].

Brainstem auditory evoked responses (BAER) were studied in Long-Evans rats in relation to development, stimulation frequency and electrode placement. Recordings made on day 11 of life showed no BAER. From day 14 on, four BAER waves were observed and centripetal maturational changes in wave latency were evident. Wave I attained adult latency values at day 20-22, wave II at day 24-25, wave II at day 24-25, and wave IV at day 39 of life. BAER latencies elicited by 8,000-Hertz tone-pips were shorter than those obtained with clicks and 4,000 Hz. Only wave II latency measures were affected significantly by electrode location.

Animals↗
PubMedDate not supplied

Daily variation patterns of airborne allergenic pollen in southwestern Spain.

The study was carried out using a Burkard sampler installed on the roof terrace of the School of Pharmacy, Seville, for two years (1995 and 1996). Eight pollen types described in the literature as having allergenic activity were chosen. They were Poaceae, Olea europaea, Chenopodiaceae/Amaranthaceae, Plantago, Rumex, Urticaceae (including Parietaria), Cupressaceae, and Platanus hispanica. The types were grouped according to the similarity of their pattern of intradiurnal variation in pollen concentration. The following associations were established by multivariate analysis: Urticaceae and Chenopodiaceae/Amaranthaceae (appearing mainly between 11:00 and 20:00), Olea europaea and Plantago (12:00 to 19:00), Poaceae and Rumex (appearing throughout the day), and Cupressaceae and Platanus hispanica (8:00 to 14:00). The patterns of intradiurnal variation were similar both years for each type, despite the fact that the two years were climatologically different (1995 was dry and 1996 wet). We conclude that these behavior patterns are endogenous to the plants, and are hardly affected by meteorological parameters.

Air Pollution↗