Results 61 to 70 of about 8,652 (169)

Phytoliths of pteridophytes

open access: yesSouth African Journal of Botany, 2011
AbstractStudy of phytoliths of pteridophytes is an emerging area of research. Literature on this aspect is limited but increasing. Some recent findings have shown that phytoliths may have systematic and phylogenetic utility in pteridophytes. Phytoliths are functionally significant for the development and survival of pteridophytes. Experiments with some
openaire   +1 more source

Geoarchaeological and Paleoenvironmental context of the human settlement in the Eastern Tandilia Range, Argentina [PDF]

open access: yes, 2013
The Tandilia range is a discontinuous series of hills and valleys located at the central area of the Pampean region (Argentina). The process of human settlement reached in this zone the highest population densities and reoccupation levels of Southern ...
Brea, Mariana   +7 more
core   +1 more source

Les phytolithes, indicateurs du cycle biogéochimique du silicium en forêt équatoriale [PDF]

open access: yes, 1994
L'étude des phytolithes permet de mieux comprendre les mécanismes de transfert du silicium entre géosphère et biosphère. Dans la forêt équatoriale du Mayombe (Congo), les phytolithes de feuilles de #Trichillia$ (#Meliaceae$) montrent une dissolution ...
Alexandre, A.   +2 more
core  

Eleanor Harrison-Buck Associate Professor of Archaeology travels to Belize [PDF]

open access: yes, 2014
Since 2011, I have directed the Belize River East Archaeology (BREA) project, which is a 6000 km2study area in the eastern half of the Belize watershed in Belize, Central America. According to sixteenth century Spanish ethnohistoric accounts, settlements
Harrisson-Buck, Eleanor
core   +1 more source

Phenotypic and Molecular Characterisation of Silicon Uptake and Deposition in Festuca arundinacea [PDF]

open access: yes, 2017
Silicon (Si) is taken up from the soil as monosilicilic acid by plant roots, transported to leaves and deposited as phytoliths, amorphous silica (SiO2) bodies, which are a key component of anti-herbivore defense in grasses. Silicon transporters have been
McLarnon, Emma
core  

Phytolith systematics, guideline for a classificatory system. A study case in the Alvear Formation (Lower Pleistocene) [PDF]

open access: yes, 2005
Se plantean las pautas clasificatorias para establecer una sistemática de fitolitos que permita un preciso tratamiento y delimitación de sus categorías, de acuerdo a las normativas de la nomenclatura botánica.
Brea, Mariana, Zucol, Alejandro Fabián
core  

AMS dates and phytolith data from mud wasp and bird nests at Carpenter's Gap, Northern Australia [PDF]

open access: yes, 2002
This paper reports a small suite of AMS radiocarbon dates and phytolith data derived from mud nests collected at the Carpenter's Gap 1 rockshelter in the southwest Kimberley, a site which has a 40,000 year old human occupation sequence.
Wallis, Lynley Anne
core  

Neandertal man the hunter: A history of Neandertal subsistence

open access: yes, 2010
The history of Neandertals has been examined by a number of researchers who highlight how historical biases have impacted popular and scientific perceptions of Neandertals.
Ready, E.
core  

Molecular Dating, Evolutionary Rates, and the Age of the Grasses [PDF]

open access: yes, 2017
Many questions in evolutionary biology require an estimate of divergence times but, for groups with a sparse fossil record, such estimates rely heavily on molecular dating methods.
Christin, Pascal-Antoine   +5 more
core  

Phytolith-Mediated Biocarbon Sequestration

open access: yesInternational Journal of Plant & Soil Science
The sequestration of biocarbon primarily arises from natural mechanisms and is acknowledged as a critical measure in mitigating climate change. An inactive form of carbon, known as phytolith occluded carbon, is sequestered within plants and persists in soil for thousands of years following the breakdown of vegetation.
Ahla K., Raji Swaroop
openaire   +1 more source

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