Blanka Pophof

Bundesamt für Strahlenschutz, BfS | Bfs · Radiation and Health

This report summarizes effects of anthropogenic electric, magnetic, and electromagnetic fields in the frequency range from 0 to 100 MHz on flora and fauna, as presented at an international workshop held on 5–7 November in 2019 in Munich, Germany. Such fields may originate from overhead powerlines, earth or sea cables, and from wireless charging sys...

This report summarizes the effects of anthropogenic radiofrequency electromagnetic fields with frequencies above 100 MHz on flora and fauna presented at an international workshop held on 5–7 November 2019 in Munich, Germany. Anthropogenic radiofrequency electromagnetic fields at these frequencies are commonplace; e.g., originating from transmitters...

Background The World Health Organization (WHO) is currently assessing the potential health effects of exposure to radiofrequency electromagnetic fields (RF-EMFs) in the general and working population. Related to one such health effect, there is a concern that RF-EMFs may affect cognitive performance in humans. The systematic review (SR) aims to ide...

Artikel in UMID - Umwelt Mensch Informationsdienst, abrufbar unter https://www.umweltbundesamt.de/sites/default/files/medien/4031/publikationen/internetversion-02-2019_0.pdf Bei Nocebo-Effekten lösen wirkstofffreie Agentien negative Wirkungen aus. Solche Effekte treten nicht nur in der Medizin auf: In Studien zeigte sich, dass Menschen teil-weise...

Problem: During the last few years, new studies on biological effects of strong static magnetic fields and on thermal effects of high-frequency electromagnetic fields used in magnetic resonance imaging (MRI) were published. Many of these studies have not yet been included in the current safety recommendations. Method: Scientific publications sin...

The sensilla trichodea of the silkmoth Antheraea polyphemus are innervated by three types of receptor neurons each responding specifically to one of three pheromone components. The sensillum lymph of these sensilla surrounding the sensory dendrites contains three different types of pheromone-binding proteins (PBPs) in high concentrations. The sensi...

Pheromone binding proteins (PBPs) occur in high concentrations in the sensillum lymph surrounding the sensory dendrites of moth pheromone-sensitive sensilla. They were shown to transport the lipophilic odorants through the aqueous sensillum lymph to the receptor cells. The sensilla trichodea of the silkmoth Antheraea polyphemus are supplied with th...

Effects of octopamine on responses of olfactory receptor neurons of Bombyx mori males and females, specialized to the reception of pheromone components and general odorants, respectively, were compared. Injections of octopamine had no effect on the transepithelial potential of antennal sensilla trichodea in both sexes. In males, octopamine increase...

Electrophysiological responses of olfactory receptor neurons in both male and female silkmoths (Bombyx mori) were investigated. In both sexes, the G-protein activator sodium fluoride and 1,2-dioctanoyl-sn-glycerol, a membrane-permeable analog of the protein kinase C activator diacylglycerol, elicited nerve impulse responses similar to those elicite...

Effects of octopamine and its antagonist epinastine on electrophysiological responses of receptor neurons of Antheraea polyphemus specialised to the pheromone components (E,Z)-6,11-hexadecadienyl acetate and (E,Z)-6,11-hexadecadienal were investigated. Injections of octopamine and epinastine into the moths had no effect on the transepithelial poten...

An earlier study (Pophof 1998) showed that the esterase inhibitor decyl-thio-trifluoropropanone inhibited the responses of two receptor neurons of the moth Antheraea tuned to straight-chain pheromone components, an acetate and an aldehyde, respectively. Here we report that decyl-thio-trifluoropropanone also inhibited the responses of two pheromone...

The pheromone of Antherae polyphemus is slowly (within min) degraded by a sensillum lymph specific esterase. The effects of two volatile alkyl-thio-trifluoro-methyl-ketones with alkyl chain length of six (HTFP) and ten carbons (DTFP), which selectively inhibit the activity of the sensillar esterase, were tested. Single sensillum recordings from sen...

The Pheromone of Antheraea polyphemus is slowly (within min) degraded by a sensillum lymph specific esterase. The effects of two volatile alkyl-thio-trifluoro-methyl-ketones with alkyl chain length of six (HTFP) and ten carbons (DTFP), which selectively inhibit the activity of the sensillar esterase, were tested. Single sensillum recordings from se...

A study was conducted to evaluate the changes that occur with aging at the dendrite level of the olfactory receptor neuron in the male silkmoth Antheraea pernyi. Using calcein AM/ethidium homodimer-1 solutions, we found increased numbers of dendrites with damaged membrane with aging. Correspondingly there was an overall decrease in the electrophysi...

Extracellular single sensillum recordings were made from the double-walled multiporous sensilla coeloconica on the antennae of males and females of Bombyx mori L. (Lepidoptera: Bombycidae). The receptor neurones responded to olfactory stimuli; no thermo- or hygroreceptors were found. Many neurones responded with a decrease of the transepithelial po...

Problem: in recent years, new studies have been published on biological effects of strong static magnetic fields and on thermal effects of high-frequency electromagnetic fields as used in magnetic resonance imaging (MRI). Many of these studies have not yet been incorporated into current safety recommendations. Method: scientific publications from 20...