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Assessment of blood pressure in brachial artery(one-step method)

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Using Adeno-associated Virus as a Tool to Study Retinal Barriers in Disease

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Published on: April 19, 2015

Bernauer's bands.

Alexander Shtukenberg¹, Erica Gunn, Massimo Gazzano

¹Department of Chemistry, New York University, 100 Washington Square East, Room 1001, New York, NY 10003, USA. bart.kahr@nyu.edu

Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry

|March 4, 2011

Summary

This summary is machine-generated.

Bernauer

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Area of Science:

Crystallography
Materials Science
Chemical Physics

Background:

Ferdinand Bernauer's 1929 monograph proposed helical twisting in polycrystalline spherulites.
This hypothesis lacked theoretical grounding in polycrystalline pattern formation.
Recent studies suggest rhythmic precipitation can explain modulated optical properties.

Purpose of the Study:

Re-examine Bernauer's hypothesis on helical crystal growth.
Investigate potassium dichromate, hippuric acid, and tetraphenyl lead.
Utilize contemporary analytical methods for detailed characterization.

Main Methods:

Micro-focus X-ray diffraction
Electron microscopy
Mueller matrix imaging polarimetry

Main Results:

Potassium dichromate exhibits rhythmic precipitation without helical twisting.
Hippuric acid spherulites are characterized as helical fibrils.
Tetraphenyl lead spherulites demonstrate combined twisting and rhythmic precipitation.

Conclusions:

Bernauer's hypothesis requires re-evaluation based on new evidence.
Rhythmic precipitation and helical twisting can coexist in crystal growth.
Complex growth mechanisms complicate optical analysis of crystalline substances.