H. Schaefer, H. Schwan · 1947
This 1947 research investigated whether ultrashort radio frequency waves could selectively heat individual cells in biological tissue, focusing on bacteria and microorganisms. The study explored how electromagnetic fields might target single cells rather than heating tissue uniformly, examining the role of different dielectric properties between cell types.
Ward G E · 1947
This 1947 study examined electrosurgery techniques that use high-frequency electrical currents to cut and destroy tissue during surgical procedures. The research focused on methods like electrocoagulation and electrodesiccation, which apply radiofrequency energy directly to human tissue. This represents one of the earliest documented medical applications of RF energy in direct contact with the human body.
Lion KS · 1947
This 1947 research investigated how metals present in biological tissues affect heating patterns during diathermy treatment, which uses radiofrequency electromagnetic fields for therapeutic heating. The study examined whether metal implants or naturally occurring metals in tissues could concentrate electromagnetic fields and create dangerous hot spots. This early work helped establish safety protocols for electromagnetic medical treatments.
H. Schaefer, H. Schwan · 1947
This 1947 research investigated how ultrashort radiofrequency waves could selectively heat individual cells within biological tissues. The study examined the potential for targeted heating effects at the cellular level using RF energy. This early work explored fundamental questions about how electromagnetic fields interact with living tissue.
MM. LES SECRÉTAIRES PERPÉTUELS · 1947
This 1947 French Academy of Sciences publication represents proceedings from academic sessions covering various scientific topics including biological chemistry. While specific EMF-related findings aren't detailed, this historical document reflects the early institutional scientific discussions that would later inform electromagnetic field research.
de Seguin L., Castelain G. · 1947
This 1947 study by De Seguin examined how ultra high frequency electromagnetic waves affected body temperature in small laboratory animals like rats and mice. The research represents early scientific investigation into whether radiofrequency radiation could cause measurable biological changes in living organisms. This work helped establish the foundation for understanding thermal effects of EMF exposure that remain relevant today.
CIGNOLINI, P · 1947
This 1947 medical research examined how to measure and calculate proper doses of shortwave radio frequency energy used in therapeutic treatments. The study focused on dosimetry methods for shortwave diathermy, a common medical practice that uses RF energy to heat deep tissues for pain relief and healing.
K. S. Lion · 1947
This article examines how the presence of metallic materials in body tissues affects the safety and efficacy of diathermy treatment using radiofrequency and short-wave energy. The research addresses thermal effects and potential complications arising from metal-tissue interactions during therapeutic diathermy applications.
URSULA M. LEDEN et al. · 1947
This 1947 study investigated how microwave radiation from radar systems affects human heating and blood circulation patterns. The research examined the biological effects of early radar technology, particularly focusing on how microwaves generate heat in human tissue and alter circulatory function. This represents some of the earliest scientific documentation of microwave biological effects in humans.
H. S. ETTER, R. H. PUDENZ, I. GERSH · 1947
This 1947 study examined how diathermy (medical heating using radio frequency radiation) affects tissues surrounding surgically implanted metals in animals. The research investigated whether RF radiation used in medical treatments could cause dangerous heating or tissue damage around metal implants. This early work established important safety considerations for medical RF procedures that remain relevant today.
F. C. HENRIQUES Jr., Ph.D. · 1947
This 1947 research by Henriques established fundamental mathematical principles for predicting how heat exposure causes permanent skin damage. The study developed rate process equations to determine when thermal injury becomes irreversible in human skin tissue. This foundational work created the scientific framework still used today to assess thermal damage from any heat source.
de Saguin, L., Costechain, C. · 1947
This 1947 French study examined how ultra high frequency electromagnetic waves at 21 centimeter wavelengths affected body temperature in small laboratory animals. The research represents one of the earliest investigations into microwave radiation's biological effects, decades before microwave ovens and wireless devices became common. This pioneering work helped establish the foundation for understanding how electromagnetic fields interact with living tissue.
Grant E. Ward, M.D. · 1947
This 1947 medical study examined electrosurgery techniques, which use high-frequency electrical currents to cut tissue and control bleeding during surgical procedures. The research focused on methods like electrocoagulation and electrodesiccation, representing early documentation of how radiofrequency energy interacts with human tissue in medical settings.
R. COOPER · 1946
This 1946 study measured the electrical properties of salt water solutions at radio frequencies from 1-4000 MHz to understand how saltwater conducts electromagnetic energy. The research provided foundational data for predicting how seawater behaves at high frequencies, which became crucial for understanding EMF propagation through biological systems since the human body is roughly 60% saltwater.
Richard H. Follis, Jr. · 1946
This 1946 military study investigated whether radar equipment used during World War II caused biological harm to personnel, following widespread rumors of sterilization and hair loss. The research found no evidence that radar waves produced dangerous biological effects. This represents one of the earliest systematic investigations into high-frequency electromagnetic radiation health effects.
Johan E. Nyrop · 1946
This 1946 research by J.E. Nyrop investigated how high-frequency electric currents specifically affect biological objects, focusing on tissue heating and modulation effects. The study examined radiofrequency electromagnetic field interactions with living tissue in laboratory conditions. This represents early scientific recognition that high-frequency electrical fields can produce measurable biological effects beyond simple heating.
Willis Jackson · 1946
This 1946 technical study by Jackson established methods for measuring how materials interact with microwave radiation at centimeter wavelengths. The research focused on developing standardized techniques and terminology for characterizing dielectric properties, which describe how substances respond to electromagnetic fields. This foundational work helped establish the scientific framework still used today to understand how microwaves interact with biological tissues.
Maj Bernard J. Lidman, MC, Capt Clarence Cohn, MC · 1945
This 1945 Naval Research Laboratory study examined 45 radar operators exposed to radar emissions for up to 9 years, finding no blood abnormalities or health effects. Parallel animal studies on guinea pigs also showed no reproductive, behavioral, or tissue changes from heavy radar exposure.
Ed. Gilles · 1944
This 1944 study by Gilles investigated how ultrashort waves (microwave radiation) kill microorganisms like bacteria. The research examined the lethal effects of this electromagnetic radiation on various microbes, providing early evidence that microwaves can damage living biological systems. This work helped establish that electromagnetic fields can have profound biological effects at the cellular level.
E. Gilles · 1944
This 1944 research investigated whether ultrashort radio waves could kill fungi and bacteria through thermal (heating) effects. The study found that these electromagnetic waves could destroy microorganisms, but only when they generated enough heat under specific conditions.
Hugh Fleming · 1944
This 1944 study by Fleming examined how high-frequency electromagnetic fields affect microorganisms like bacteria. The research investigated biological effects of RF fields on microbes, likely in connection with medical diathermy treatments. This represents early scientific inquiry into how electromagnetic energy interacts with living organisms at the cellular level.
H. Schaefer, H. Schwan · 1943
This 1973 research examined how small particles heat up differently when exposed to ultrashort wave (high-frequency) electromagnetic fields in a condenser setup. The study investigated selective heating patterns, where certain particles absorb more energy than others under specific electromagnetic conditions. This early work helped establish fundamental principles about how electromagnetic energy interacts with small-scale materials.
Daily LE · 1943
This 1943 clinical study examined the health effects of radar and high-frequency radio exposure on laboratory personnel during World War II. The research represents one of the earliest documented investigations into occupational EMF exposure in workers handling radar equipment. This pioneering study helped establish the foundation for understanding potential health risks from high-powered electromagnetic radiation in workplace settings.
Daily LE · 1943
This 1943 clinical study examined laboratory personnel exposed to radar and high-frequency radio equipment, conducting blood counts and physical examinations to assess health effects. The research represents one of the earliest documented investigations into occupational EMF exposure from radar technology. This wartime study established a foundation for understanding potential health impacts from high-powered electromagnetic radiation sources.
H. Schaefer, H. Schwan · 1943
This 1943 German technical study examined temperature distribution and heating effects in water-oil emulsions when exposed to radiofrequency radiation. The research focused on mathematical modeling and experimental verification of how RF energy creates selective heating patterns in these mixed liquid systems. This represents early scientific work on how electromagnetic fields interact with biological-like materials.
