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A Host‐Guest, Zeolite/Organocation Material With Isotropic Zero Thermal Expansion

open access: yesAdvanced Functional Materials, EarlyView.
The use of selected organic structure directing agents for the hydrothermal synthesis of targeted zeolites exhibiting negative thermal expansion provides a straightforward strategy to obtain a new class of host‐guest, nanostructured, crystalline zero thermal expansion materials made of light and abundant elements.
João Pedro Falk de Campos   +4 more
wiley   +1 more source
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Tissue compensation—difference compensators

The British Journal of Radiology, 1982
When a patient is treated with beams of ionising radiation, the shape of the patient's surface affects the distribution of absorbed dose received by the irradiated tissue. One way of dealing with the dosimetric problems thus caused is to construct compensating filters designed so that the effect of the patient's shape on the beam is counteracted by the
openaire   +2 more sources

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