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Results for “Solar Activity”

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PubMedDate not supplied

[The human body response to factors related to solar activity variations].

The effect of nonstationary solar processes on human organism was studied. Daily measurements of electrical conductivity of 22 biologically active points on human skin, arterial pressure, and pulse frequency of 30 persons were performed, and their subjective sensations were registered. A comparative analysis of the data and variations in environment parameters, such as local A-index, atmospheric pressure, temperature, and indices of cosmic rays indicated a coincidence of their main periods. The conclusion is made that the reaction of the human organism on abrupt solar disturbances is biphasic and that there is a semiannual wave of synchronization of work of internal organs. The results are confirmed by simultaneous measurements in different cities.

Acupuncture Points↗
PubMedDate not supplied

[Fluctuations in biophysical measurements as a result of variations in solar activity].

A theory is proposed to explain variations in the net electrical charge of biological substances at the Earth's surface. These are shown to occur in association with changes in the solar wind and geomagnetic field. It is suggested that a liquid dielectric's net volume charge will imitate pH effects, influence chemical reaction rates, and alter ion transfer mechanisms in biophysical systems. An experiment is described which measures dielectric volume charge, or non-neutrality, to allow correlation of this property with daily, 28-day, and 11-year fluctuation patterns in geophysical and satellite data associated with solar activity and the interplanetary magnetic field.

Biophysical Phenomena↗
PubMed1992

Description, analysis and impact of major solar activity during recent U.S. Shuttle missions.

Since STS-26, three large solar events have occurred during Shuttle missions; a geomagnetic storm during STS-29 and solar particle events (SPEs) during STS-28 and -34. The maximum dose to a crew attributed to an SPE was estimated to be 30 microGy (70 microSv). Time-resolved dosimetry measurements of the SPE dose during STS-28 were made using the Air Force Radiation Monitoring Equipment (RME)-III. Comparison of calculated and measured dose demonstrated a discrepancy, possibly a result of deficiencies in the geomagnetic cutoff model used. This experience demonstrates that dose from an SPE is strongly dependent on numerous factors such as orbit inclination, SPE start time, spectral parameters and geomagnetic field conditions; the exact combination of these factors is fortuitous. New sources of data and procedures are being investigated, including real-time tracking of auroral oval positions or determination of particle cutoff latitudes, for incorporation into operational Shuttle radiation support practices.

Cosmic Radiation↗
PubMed2002

The biological effects of solar activity.

The synchronization of biological circadian and circannual rhythms is broadly viewed as a result of photic solar effects. Evidence for non-photic solar effects on biota is also slowly being recognized. The ultrastructure of cardiomyocytes from rabbits, the time structure of blood pressure and heart rate of neonates, and the heart rate variability of human adults on earth and in space were examined during magnetically disturbed and quiet days, as were morbidity statistics. Alterations in both the about-daily (circadian) and about-weekly (circaseptan) components are observed during disturbed vs. quite days. The about-weekly period of neonatal blood pressure correlates with that of the local geomagnetic disturbance index K. Circaseptans which are seen early in human life and in various other forms of life, including unicells, may provide information about the possible site(s) of life's origins from an integrative as well as adaptive evolutionary perspective.

Animals↗
PubMed2004

Beryllium-7 and solar activity.

A very low concentration of (7)Be in air at Thessaloniki, Northern Greece (40 degrees 38'N, 22 degrees 58'E) was recorded on November 9, 2003 following a strong event of solar wind that occurred on October 29, 2003.

Air Pollutants, Radioactive↗
PubMed1999

[The determination of the radiation risk during an interplanetary space flight at different periods of solar activity].

Based on the own algorithm and Fortran calculation program the authors estimated radiation risk to cosmonauts on an interplanetary mission. They also analyzed the dependence of risk values on mission duration, space vehicle shield thickness, solar phase, and cosmonaut's age. The magnitudes of radiation risk to cosmonauts were compared with the national demographic risk of male lethality over a similar period of time.

Adult↗
PubMedDate not supplied

[A possible biophysical mechanism of the solar activity effect on the central nervous system in man].

A biophysical mechanism of interaction between the man and environment is proposed, which treats these components as two correlated oscillation contours with discrete resonance frequencies. The coincidence of biocurrent frequencies of the human brain with the resonance frequencies of the cavity formed by the Earth surface and the lower ionosphere boundary allows one to consider the influence of solar flares on the human organism in terms of variations of the cavity frequencies due to changes in the parameters of its upper wall.

Atmosphere↗