نتایج جستجو برای: waterlogged

تعداد نتایج: 578  

Journal: :Journal of Cultural Heritage 2021

Waterlogged archaeological wood can provide information on past human activities and technology but its structure may be modified due to microbial deterioration. Knowing conservation state is fundamental for restoration. Aim of this work was test the use non-destructive portable NMR microstructural characterization preservation three samples (Roman age, 5th century AD). 1D T1 T2 relaxation time...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Magnus Sandström Farideh Jalilehvand Emiliana Damian Yvonne Fors Ulrik Gelius Mark Jones Murielle Salomé

In marine-archaeological oak timbers of the Mary Rose large amounts of reduced sulfur compounds abound in lignin-rich parts such as the middle lamella between the cell walls, mostly as thiols and disulfides, whereas iron sulfides and elemental sulfur occur in separate particles. Synchrotron-based x-ray microspectroscopy was used to reveal this environmentally significant accumulation of organos...

2012
N. O. GREGORIO J. L. HERBOHN J. K. VANCLAY

A series of trials examining fertilizer-shading interactions on the island of Leyte (Philippines, 11°N) revealed that the endemic dipterocarp mayapis (Shorea palosapis) benefits from shade trees, either directly above or to the east, during the early stages of plantation establishment. Although it can attain 2 cm/year diameter increment in plantations, mayapis exhibits poor growth and survival ...

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