Results 21 to 30 of about 978,649 (302)

A contribution to the knowledge of Scots pine (Pinus sylvestris L.) stem shape

open access: yesJournal of Forest Science, 2004
This is a study on the evaluation of stem shape in Scots pine. The experiments were carried out on 430 stems without bark, taken from 30 fully analysed sample trees that grew in 5 different locations in the Czech Republic. Generalized Procrustes analysis
M. Křepela, J. Sequens, D. Zahradník
doaj   +1 more source

An Anatomical Study of the Genus Psephellus (Asteraceae) from Flora of Iran [PDF]

open access: yesتاکسونومی و بیوسیستماتیک, 2017
The present study deals with leaf and stem anatomical survey of 10 species of the genus Psephellus (Asteraceae) from flora of Iran. After collecting and identifying the specimens, leaf and stem cross sections were prepared by hand and best sections were ...
MohammadReza Parishani   +2 more
doaj   +1 more source

Phenotypic diversity of wild Sierra Leonean coffee (Coffea stenophylla) collected from Kenema and Moyamba districts

open access: yesBeverage Plant Research, 2023
Coffee is a major cash and export crop in Sierra Leone and is mainly cultivated in southern and eastern provinces. Kenema, Kailahun, Moyamba, Bo, Pujehun and Kono are major coffee growing districts in the country.
Paul Musa Lahai   +4 more
doaj   +1 more source

Morphological Response of Eight Quercus Species to Simulated Wind Load. [PDF]

open access: yesPLoS ONE, 2016
Leaf shape, including leaf size, leaf dissection index (LDI), and venation distribution, strongly impacts leaf physiology and the forces of momentum exerted on leaves or the canopy under windy conditions.
Tonggui Wu   +4 more
doaj   +1 more source

Retrotransposons shape species-specific embryonic stem cell gene expression [PDF]

open access: yesRetrovirology, 2015
Over half of our genome is composed of retrotransposons, which are mobile elements that can readily amplify their copy number by replicating through an RNA intermediate. Most of these elements are no longer mobile but still contain regulatory sequences that can serve as promoters, enhancers or repressors for cellular genes.
Robbez-Masson, L, Rowe, HM
openaire   +3 more sources

Alginate Scaffolds for Mesenchymal Stem Cell Cardiac Therapy: Influence of Alginate Composition [PDF]

open access: yes, 2012
Despite the success of alginate scaffolds and mesenchymal stem cells (MSCs) therapy in cardiac failure treatment, the impact of the physicochemical environment provided by alginate matrices on cell behavior has never been investigated.
Alfarano, Chiara   +7 more
core   +2 more sources

A precision RNA degradation machinery shapes stem cell development [PDF]

open access: yesJournal of Cell Biology, 2019
In this issue, Belair et al. (2019. J. Cell Biol. https://doi.org/10.1083/jcb.201811148) show that, together with a complex network of transcription factors and chromatin modifiers, the RNA exosome regulates embryonic stem cell (ESC) differentiation and pluripotency.
Patrícia Pereira, Cecília M. Arraiano
openaire   +2 more sources

Tree stems from terrestrial laser scanner measurements

open access: yesMetsanduslikud Uurimused, 2015
Terrestrial laser scanner (TLS) measurements were carried out in mature birch, pine, and spruce stands in Järvselja, Estonia. The structure of stands has been previously studied.
Kuusk Andres   +3 more
doaj   +1 more source

Evaluation of silver fir provenances at 51 years of age in provenance trials in the Předhoří Hrubý Jeseník and Nízký Jeseník Mts. regions, Czech Republic

open access: yesJournal of Forest Science, 2023
In 2021, measurements were done at two international provenance research trials for silver fir originating from the same series of experiments. The investigation was carried out in the location Vítkov and Úsov, where both trials were established ...
Martin Fulín   +3 more
doaj   +1 more source

Physico-electrochemical Characterization of Pluripotent Stem Cells during Self-Renewal or Differentiation by a Multi-modal Monitoring System. [PDF]

open access: yes, 2017
Monitoring pluripotent stem cell behaviors (self-renewal and differentiation to specific lineages/phenotypes) is critical for a fundamental understanding of stem cell biology and their translational applications.
Horner, Christopher B   +7 more
core   +3 more sources

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