Preliminary study of the effects of wind velocities and wind shadows upon suction trap catches of mosquitoes (Diptera: Culicidae).
Explore the source record for details and available documents.
Animals↗
SEARCH · Search PubMed
Results for “Wind”
Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
[Aerodynamics close to the ground: representation of local wind conditions across built-up and vacant lots based on the available literature. Part I: description of natural wind close to the ground].
Explore the source record for details and available documents.
Air Movements↗
[Close-to-the-ground aerodynamics. Description of local wind conditions over built-up and empty spaces as based on available literature. II. Simulation of close-to-the-ground wind currents as well as currents around buildings and building complexes].
Explore the source record for details and available documents.
Air Movements↗
Wind me up! Wind me down! Regulation of Eukaryotic DNA Replication, sponsored by McGill University, Montreal, Canada, March 5-8, 1990.
Explore the source record for details and available documents.
Animals↗
Avoidance response, house response, and wind responses of the sporangiophore of Phycomyces.
Avoidance response: An object placed 1 mm from the growing zone of a Phycomyces sporangiophore elicits a tropic response away from the object. The dependence of this response on the size of the object and its distance from the specimen is described, as well as measurements which exclude electric fields, electromagnetic radiation, temperature, and humidity as avoidance-mediating signals. This response is independent of the composition and surface properties of the object and of ambient light. House Response: A house of 0.5- to 10-cm diameter put over a sporangiophore elicits a transient growth response. Avoidance responses inside closed houses are slightly smaller than those in the open. Wind responses: A transverse wind elicits a tropic response into the wind, increasing with wind speed. A longitudinal wind, up or down, elicits a transient negative growth response to a step-up in wind speed, and vice versa. It is proposed that all of the effects listed involve wind sensing. This proposal is supported by measurements of aerodynamic effects of barriers and houses on random winds. The wind sensing is discussed in terms of the hypothesis that a gas is emitted by the growing zone (not water or any normal constituent of air), the concentration of which is modified by the winds and monitored by a chemical sensor. This model puts severe constraints on the physical properties of the gas.
Fungi↗
Anatomy and physiology of identified wind-sensitive local interneurons in the cricket cercal sensory system.
1. A group of wind sensitive local interneurons (9DL Interneurons) in the terminal abdominal ganglion of the cricket Acheta domesticus were identified and studied using intracellular staining and recording techniques. 2. The 9DL interneurons had apparent resting potentials ranging from -38 mV to -45 mV. At this membrane potential, these cells produced graded responses to wind stimuli; action potentials were never observed at these resting potentials. However, when the 9DL interneurons were hyperpolarized to a membrane potential of approximately -60 mV, a single action potential at the leading edge of the wind stimulus response was sometimes observed. 3. The wind stimulus threshold of the 9DL interneurons to the types of stimuli used in these studies was approximately 0.01 cm/s. Above this threshold, the excitatory responses increased logarithmically with increasing peak wind velocity up to approximately 0.5 cm/s. 4. The 9DL interneurons were directionally sensitive; their response amplitudes varied with wind stimulus orientation. 9DL1 cells responded maximally when stimulated with wind directed at the front of the animal. The apparent peak in directional sensitivity of the 9DL2 interneurons varied between the side and the rear of the animal, depending upon the site of electrode penetration within the cell's dendritic arbor. 5. The locations of dendritic branches of the 9DL interneurons within the afferent map of wind direction were used to predict the excitatory receptive field of these interneurons.
Action Potentials↗
An explication of 'wind illness' in northern Thailand.
'Wind illness' is a very common complaint among the Northern Thai, yet is rarely recognized by Thai physicians trained in biomedicine. Persons most susceptible to 'wind illness' are adult women who have ever borne a child. Consequently, data were obtained from 415 everparous women, 43% of whom reported ever having had 'wind illness' and 57%. never having had it. In addition, 20 individuals who had ever had the syndrome were followed for case study, and 13 indigenous healers who traditionally treat clients suffering 'wind illness' were interviewed. Their perceptions of the etiology, symptomatology and treatment of 'wind illness' are reported in Part I. Part II is an attempt to define 'wind illness' in terms of biomedicine and as a consequence of fertility. Part III synthesized the emic and etic accounts with explanations for the perdurance of 'wind illness' despite the advances of biomedicine and the recent fertility decline in Northern Thailand.
Adult↗
Influence of wind on chronic ultraviolet light-induced carcinogenesis.
Wind enhances the carcinogenic effect of chronic Iltraviolet radiation (UVL). This was demonstrated in hairless mice that were irradiated for 42 weeks with mercury are lamps. One group of animals was exposed to continuous wind flow of 2.7 m/s except for the daily I-2 min time interval when they were removed from the wind tunnel and irradiated. Another group of animals received identical irradiation but were protected from wind. The first tumour appeared in the UVL and wind group after 105 days of irradiation, and at 164 days of irradiation all surviving mice in the group had developed tumours. The group of mice receiving identical irradiation but protected from wind had their first tumour appear at 154 days of irradiation, and by 164 days of irradiation only 40% of the mice had developed tumours.
Air Movements↗
Cold wind stimulation reflex.
The bradycardia induced by cold wind blown on the face and the early cephalic release of insulin induced by feeding have been shown to be caused by a vagal reflex stimulation. An experiment was designed to determine whether cold wind blown on the face would induce both pancreatic and cardiac stimulation. A 4 degrees C wind blown on the face for 4 min produced a rapid and persistent bradycardia, which interestingly persisted for up to 35 min after the test. The effect on respiration rate is more gradual and vanishes immediately after cold wind stimulation. Cold wind produced a slight reduction of insulin secretion, as evidenced by the fall of both plasma insulin and C-peptide, and caused a significant increase in plasma norepinephrine. These results suggest that the cold wind action of the vagus nerve is exerted on the heart and that of the sympathetic on the pancreas, whereas during the cephalic phase of feeding a vagal influence is observed on the pancreas and a sympathetic action on the heart. The mechanisms of the quantitative and qualitative control of these autonomic responses are not known and deserve further investigation.
Adult↗
Wind velocity effects on sampling rate of NO2 badge.
The effects of wind velocity on a sampling rate of a nitrogen dioxide (NO2) diffusive badge were experimentally determined using a turntable. The use of a turntable permits the collection of the large amounts of data that are needed for statistically reliable results at several wind velocities in one experiment. The regression model for the wind effect determined by these experiments was closely correlated with data previously gathered from experiments using wind tunnels. Experiments at two different relative humidities, 35% and 60%, were performed and analyzed by a simple least square regression model. A multi-regression model containing two independent variables, wind velocity and relative humidity, also was developed. The multi-regression model was useful at relative humidity between 20% and 60% and wind velocity between 0 and 7 meter per second (m/sec).
Air Pollutants↗
[Correlation of certain parameters of solar winds and sudden cardiovascular deaths].
In day-to-day investigations the closest correlation with sudden cardiovascular mortality is displayed by the density of solar wind. An increased mortality is recorded after its brisk rise (in particular after potent proton phenomena) and paradoxically also in case of very low density value. Minor proton phenomena and eruptions with X-ray emission did not influence the mortality in the authors' group. This type of increased solar activity thus should not influence the prognosis of morbidity and mortality from cardiovascular diseases. When mean monthly density values of solar wind are correlated with mortality, the relationship is paradoxically indirect. The rate and temperature of the solar wind does not play any part due to its phase retardation after increased density. The correlation of mean annual values of all parameters of solar wind (i.e. density, velocity and temperature) and mortality is also indirect. There is no explanation so far for the increased mortality during low density levels during the interval between two rises in the course of day-to-day monitoring. For the short-term mortality prognosis thus potent proton phenomena can be used; the effect of very low values of solar wind density will have to be confirmed. The biogenic action of solar wind is obviously more complex than was formerly assumed.
Cardiovascular Diseases↗
[Experimental examinations about the influence of prosthetic therapeutic remedies for players on a wind-instrument as to the quality of the instrumental sound].
In 20 professional players on a wind-instrument (10 musicians on wood wind-instruments, 10 ones on brass wind-instruments) the condition was examined if there are significant connections between the meanwhile applied prosthetic therapeutic remedies (imitated by measuring bodies) and the instrumental sound produced by them. The sound quality was analysed as to the quality as well as to the quantity by an appropriate narrow band spectrometer, and a sound index was figured out. By this method we succeeded in demonstrating the use of a maxillary plate in the anterior third of the palate and that one of back-ground splints in the upper front tooth region of players on brass wind-instruments to cause significant sound changes. Additionally, a significant change in sound impression was stated by placing a maxillary plate into the middle of the third of the palate. Thus we succeeded to point out the prosthetic-critical zones of players on a wood wind- and a brass wind-instrument.
Adolescent↗
Possible spread of African horse sickness on the wind.
Analyses of outbreaks of African horse sickness showed that movement of infected Culicoides midges on the wind was most likely responsible for the spread of the disease over the sea from Morocco to Spain in 1966, from Turkey to Cyprus in 1960, and from Senegal to the Cape Verde Islands in 1943. The pattern of spread of the epidemic in the Middle East in 1960 could have been laid down by the infected midges carried on spells of south-east winds, and analyses of outbreaks in Algeria in 1965 and India in 1960 also suggested windborne spread of the disease. Each spread occurred when the presence of virus, host and vector coincided either with a spell of winds unusual for a particular time of year (Spain, Cyprus, Cape Verde Islands and Algeria) or with a series of disturbances usual at that time of the year (Middle East and India). Inferred flight endurance of the midge varied up to at least 20 h and flight range from 40 to 700 km. Flight occurred when temperatures were likely to have been in the range of 15-25 degrees C if it was at night or 20 to about 40 degrees C if it was by day.It is suggested that likely movements of midges on the wind can be estimated from synoptic weather charts, and should be taken into account when planning control of the disease in the face of an outbreak. Such control includes a ban on movement of horses, vaccination and spraying of insecticide.The risk of spread to countries outside the endemic areas should be assessed by reference to possible wind dispersal of infected midges.
Africa, Northern↗
Impact of supersonic versus propeller wind data on dispersion estimates for nuclear plants.
Statistical analyses and comparisons of the wind data obtained by the propeller and supersonic anemometers at the Japan Atomic Energy Research Institute (JAERI) were performed. For wind speeds less than 1 ms-1, the propeller readings are inaccurate and are generally 0.5 ms-1 less than the supersonic readings. Thus, the number of calms recorded differs. These differences affect the sum of the inverse of wind speed, frequency distribution of wind direction, and the annual percentage frequency distribution of stability categories. The resultant average air concentrations and ground-level gamma exposure rates due to the normal operational releases from a nuclear plant are overestimated when calculated using the propeller wind data.
Air Pollutants, Radioactive↗
Effects of temperature and wind on facial temperature, heart rate, and sensation.
Skin temperature measurements of the face have shown that the cheek cools faster than the nose and the nose faster than the forehead. The cooling effect of wind is maximum at wind speeds between 4.5 and 6.7 m/s. Cold winds produce significant bradycardia, which is, however, much more pronounced during the expiratory phase of respiration. A significant correlation was noted between cooling of face and the reflex bradycardia observed. Similarly, a very significant correlation was noted between drop in skin temperature and subjective evaluation of cold discomfort. Consequently, the drop in skin temperature, reflex bradycardia, and subjective evaluation are parameters which are directly affected by cold wind and can be used as adequate indicators of the degree of discomfort. When comparing the present results with the windchill index, it was found that in the zone described as "dangerously cold" the index fits well with the physiological measurements. In the zone described as "bitterly cold," the index by comparison with actual skin temperature measurements and subjective evaluation underestimates the cooling effects of combined temperature and wind by approximately 10 degrees C.
Adult↗
Injuries related to wind speed.
This is a retrospective study of the injuries caused by high wind speeds during the storms of early 1990. Injured patients seen on windy days were compared with those seen on a group of control days. It was found that high wind speeds were associated with an increased risk of injury, especially when wind gusts exceeded 60 knots. This apparent wind speed threshold, above which injury is more likely, corresponds to the curve used by the Meteorological Office to predict wind-related structural damage. It is postulated that this finding may be of use in assisting the Government in formulating its guidelines on when to warn the public that it is unsafe to venture out.
Adolescent↗
Wind-up of tooth pulp-evoked responses and its suppression in rat trigeminal caudal neurons.
Induction and suppression of wind-up were studied in 97 tooth pulp-driven neurons in the trigeminal subnucleus caudalis, using Wistar albino rats anesthetized with urethane and alpha-chloralose. Tooth pulp stimulation applied to an ipsilateral lower incisor evoked early discharges, indicating excitatory inputs from A-delta fibers and subsequent late discharges from C-fiber volleys in caudal neurons. Wind-up was efficiently evoked by stimulation delivered at 0.3-1 Hz, with current intensity sufficient to evoke late discharges. Conditioning stimulation of the arcuate nucleus of the hypothalamus (ARH) suppressed late discharges, including wind-up, without affecting the A-fiber response. Focal cooling of the periaqueductal gray (PAG) abolished the suppression by the ARH and further enhanced the wind-up of the caudal neurons. These results suggest: 1) Temporal summation of depolarization evoked by C-fiber volleys builds wind-up in caudal neurons; 2) ARH stimulation suppresses late discharges by blocking synaptic transmission from C-fiber inputs, and this interrupts prolonged facilitation of the neurons; 3) the ARH is involved in induction of inhibitory controls descending from the PAG to the trigeminal caudalis.
Animals↗
Relation of musical wind instruments to malocclusion.
Eighty-four seventh graders of both sexes, not undergoing orthodontic treatment, participated in a double-blind study to determine the effect on the anterior teeth of playing a musical wind instrument. The instrument players were just beginning their studies. Seventh graders not playing a musical wind instrument served as the control group. Impressions and plaster casts were made of each mouth at the beginning and conclusion of the study. The plaster casts were marked with the same numerical code assigned to each student. Overjet and overbite measurements of the anterior teeth were taken from the plaster casts and recorded. Findings indicate that, on an individual basis, the effect on the anterior teeth of playing a musical wind instrument is unpredictable. Only on a group basis can a class of musical wind instruments be theorized to have a certain effect on the anterior teeth. The playing of a musical wind instrument should not be used as a substitute for orthodontic treatment.
Adolescent↗