Development and application of a SQUID sensor array for the measurement of biomagnetic fields

Hahneiser, O.; Kohlsmann, S.; Hetscher, M.; Kramer, K.D.

doi:10.1016/0302-4598(95)01784-c

Cited by 6 publications

(1 citation statement)

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“…Of course various forms of natural and artificial radiation can have effects on the cellular processes but cells can compensate for this within a wide range. As we mentioned before, living cells can sense and use the Earth's weak magnetic fields, which are 100 billion times stronger than brain's magnetic processes [27]. At the same time, during MRI experiments we are exposed to very strong 1-14 Tesla magnetic fields, which are much stronger than Earth's magnetic field.…”

Section: Ion Gate Model Of Biomagnetitesmentioning

confidence: 98%

Information storing by biomagnetites

Bókkon

Salari

2009

J Biol Phys

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Since the discovery of the presence of biogenic magnetites in living organisms, there have been speculations on the role that these biomagnetites play in cellular processes. It seems that the formation of biomagnetite crystals is a universal phenomenon and not an exception in living cells. Many experimental facts show that features of organic and inorganic processes could be indistinguishable at nanoscale levels. Living cells are quantum "devices" rather than simple electronic devices utilizing only the charge of conduction electrons. In our opinion, due to their unusual biophysical properties, special biomagnetites must have a biological function in living cells in general and in the brain in particular. In this paper, we advance a hypothesis that while biomagnetites are developed jointly with organic molecules and cellular electromagnetic fields in cells, they can record information about the Earth's magnetic vector potential of the entire flight in migratory birds.

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Section: Ion Gate Model Of Biomagnetitesmentioning

confidence: 98%

Information storing by biomagnetites

Bókkon

Salari

2009

J Biol Phys

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Influence of modulated high-frequency electromagnetic fields on the functional organization and dynamics of the common brainstem system

Rittweger

Lambertz

Kluge

et al. 1995

Bioelectrochemistry and Bioenergetics

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Voltage response of non-uniform arrays of bi-superconductive quantum interference devices

Longhini

Berggren

Escobar

et al. 2012

Journal of Applied Physics

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Multi-loop arrays of Josephson junctions (JJs) with non-uniform area distributions, which are known as superconducting quantum interference filters (SQIFs), are the most highly sensitive sensors of changes in applied magnetic field as well as the absolute magnitude of magnetic fields. The non-uniformity of the loop sizes allows the array to produce a unique collective voltage response that has a pronounced single peak with a large voltage swing around zero magnetic field. To obtain high linear dynamic range, which is critical for a wide variety of applications, the linearity of the slope of the anti-peak response must be improved. We propose a novel scheme for enhancing linearity—a new configuration combining the SQIF array concept with the recently introduced bi-superconductive quantum interference device (SQUID) configuration, in which each individual SQUID loop is made up of three JJs as opposed to using two JJs per loop in standard dc SQUIDs. We show, computationally, that the additional junction offers a viable linearization method for optimizing the voltage response and dynamic range of SQIF arrays. We have realized SQIF arrays based on bi-SQUID cells and present first experimental results.

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Development and application of a SQUID sensor array for the measurement of biomagnetic fields

Cited by 6 publications

References 0 publications

Information storing by biomagnetites

Information storing by biomagnetites

Influence of modulated high-frequency electromagnetic fields on the functional organization and dynamics of the common brainstem system

Voltage response of non-uniform arrays of bi-superconductive quantum interference devices

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