In situ measurement of alternating current magnetic susceptibility of Pd–hydrogen system for determination of hydrogen concentration in bulk

2012 ◽  
Vol 83 (7) ◽  
pp. 075102 ◽  
Author(s):  
Satoshi Akamaru ◽  
Masanori Hara ◽  
Masao Matsuyama
Keyword(s):  
Magnetic Susceptibility ◽  
Hydrogen Concentration ◽  
Alternating Current ◽  
In Situ Measurement ◽  
Hydrogen System

Atmospheric pollution assessed by in situ measurement of magnetic susceptibility on lichens

2018 ◽  
Vol 95 ◽  
pp. 831-840 ◽  
Author(s):  
Débora C. Marié ◽  
Marcos A.E. Chaparro ◽  
Juan M. Lavornia ◽  
Ana M. Sinito ◽  
Ana G. Castañeda Miranda ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Atmospheric Pollution ◽  
In Situ Measurement

scholarly journals Quantum magnetic imaging of iron organelles within the pigeon cochlea

2021 ◽  
Vol 118 (47) ◽  
pp. e2112749118
Author(s):  
Robert W. de Gille ◽  
Julia M. McCoey ◽  
Liam T. Hall ◽  
Jean-Philippe Tetienne ◽  
E. Pascal Malkemper ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Particle ◽  
Imaging Techniques ◽  
Iron Storage ◽  
Magnetic Imaging ◽  
Geomagnetic Fields ◽  
The Individual ◽  
Individual Particles

The ability of pigeons to sense geomagnetic fields has been conclusively established despite a notable lack of determination of the underlying biophysical mechanisms. Quasi-spherical iron organelles previously termed “cuticulosomes” in the cochlea of pigeons have potential relevance to magnetoreception due to their location and iron composition; however, data regarding the magnetic susceptibility of these structures are currently limited. Here quantum magnetic imaging techniques are applied to characterize the magnetic properties of individual iron cuticulosomes in situ. The stray magnetic fields emanating from cuticulosomes are mapped and compared to a detailed analytical model to provide an estimate of the magnetic susceptibility of the individual particles. The images reveal the presence of superparamagnetic and ferrimagnetic domains within individual cuticulosomes and magnetic susceptibilities within the range 0.029 to 0.22. These results provide insights into the elusive physiological roles of cuticulosomes. The susceptibilities measured are not consistent with a torque-based model of magnetoreception, placing iron storage and stereocilia stabilization as the two leading putative cuticulosome functions. This work establishes quantum magnetic imaging as an important tool to complement the existing array of techniques used to screen for potential magnetic particle–based magnetoreceptor candidates.

In vivo and in situ measurement of electrical impedance for determination of distention in proximal stomach of rats

2006 ◽  
Vol 28 (7) ◽  
pp. 648-655 ◽  
Author(s):  
L. Garay ◽  
E.G. Ramos ◽  
E. Cardiel ◽  
R. Muñoz ◽  
P.R. Hernández
Keyword(s):  
Electrical Impedance ◽  
In Situ Measurement ◽  
Proximal Stomach

scholarly journals High-temperature superconductivity in sulfur hydride evidenced by alternating-current magnetic susceptibility

2019 ◽  
Vol 6 (4) ◽  
pp. 713-718 ◽  
Author(s):  
Xiaoli Huang ◽  
Xin Wang ◽  
Defang Duan ◽  
Bertil Sundqvist ◽  
Xin Li ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
High Temperature Superconductivity ◽  
Theoretical Calculations ◽  
Meissner Effect ◽  
Alternating Current ◽  
Superconducting Phase ◽  
Electron Phonon Interaction

ABSTRACT The search for high-temperature superconductivity is one of the research frontiers in physics. In the sulfur hydride system, an extremely high Tc (∼200 K) has been recently developed at pressure. However, the Meissner effect measurement above megabar pressures is still a great challenge. Here, we report the superconductivity identification of sulfur hydride at pressure, employing an in situ alternating-current magnetic susceptibility technique. We determine the superconducting phase diagram, finding that superconductivity suddenly appears at 117 GPa and Tc reaches 183 K at 149 GPa before decreasing monotonically with increasing pressure. By means of theoretical calculations, we elucidate the variation of Tc in the low-pressure region in terms of the changing stoichiometry of sulfur hydride and the further decrease in Tc owing to a drop in the electron–phonon interaction parameter λ. This work provides a new insight into clarifying superconducting phenomena and anchoring the superconducting phase diagram in the hydrides.

INDIREKTE PAPIERCHROMATOGRAPHISCHE METHODE ZUR BESTIMMUNG DER HARNOESTROGENE

1961 ◽  
Vol 38 (4) ◽  
pp. 545-562 ◽  
Author(s):  
L. Kecskés ◽  
F. Mutschler ◽  
I. Glós ◽  
E. Thán ◽  
I. Farkas ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Granulosa Cell ◽  
Iron Content ◽  
List Type ◽  
Granulosa Cell Tumour ◽  
Hydrolysis Of ◽  
Phenol Fraction ◽  
Qualitative Determination

ABSTRACT 1. An indirect paperchromatographic method is described for separating urinary oestrogens; this consists of the following steps: acidic hydrolysis, extraction with ether, dissociation of phenol-fractions with partition between the solvents. Previous purification of phenol fraction with the aid of paperchromatography. The elution of oestrogen containing fractions is followed by acetylation. Oestrogen acetate is isolated by re-chromatography. The chromatogram was developed after hydrolysis of the oestrogens 'in situ' on the paper. The quantity of oestrogens was determined indirectly, by means of an iron-reaction, after the elution of the iron content of the oestrogen spot, which was developed by the Jellinek-reaction. 2. The method described above is satisfactory for determining urinary oestrogen, 17β-oestradiol and oestriol, but could include 16-epioestriol and other oestrogenic metabolites. 3. The sensitivity of the method is 1.3–1.6 μg/24 hours. 4. The quantitative and qualitative determination of urinary oestrogens with the above mentioned method was performed in 50 pregnant and 9 non pregnant women, and also in 2 patients with granulosa cell tumour.

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