Results 101 to 110 of about 5,401,070 (277)

Macroscopic Anatomy as a Strategy for Recognizing Commercial Wood from the Brazilian Amazon

open access: yesBioResources
Wood anatomical characterization is a key method for species identification and for combating illegal logging. This study aimed to provide a detailed macroscopic anatomical characterization of twelve wood species from the Brazilian Amazon, supporting ...
Waldelaine R. Hoffmann   +4 more
doaj  

Reconstructing the temperature degree of the warm seasons through Quercus persica tree rings in Zagros forests Dena region [PDF]

open access: yesتحقیقات کاربردی علوم جغرافیایی, 2015
Trees can record long-term effects of climate variables. Using dendroclimatology knowledge, we can reconstruct such variables especially for areas which have short-term climatic data.
Hossein zarean
doaj  

The role of miR‐335‐5p in the redifferentiation of BRAF p.V600E thyroid cancers

open access: yesMolecular Oncology, EarlyView.
The BRAF p.V600E mutation promotes thyroid cancer dedifferentiation and radioiodine resistance. Using a network approach, we identified miR‐335‐5p as a key regulator of BRAF‐mutated thyroid tumors. Restoring miR‐335‐5p increased thyroid‐specific gene expression and iodine uptake in cells and organoids.
Valeria Pecce   +11 more
wiley   +1 more source

Crystal growth and Witt rings

open access: yesJournal of Algebra, 1991
The notion of mathematical crystal growth was used by D. A. Klarner [Kl, K2] to study spreading of information in a large computer net. His main result states that the generating function of a growing crystal is always a rational function with explicitly determined denominator. In a quite different context, W.
openaire   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Dendrochronological Potential of Tropical Species in the Peruvian Amazon: An Analysis in Flooded Forests of the Southeast

open access: yesBioResources
Research on growth rings in tropical trees within flooded forests has unveiled the complexity of climate change in these ecosystems. However, there has been limited understanding regarding species and their potential for dendrochronology.
Miguel A. Ranilla-Huamantuco   +6 more
doaj  

Circular RNA expression landscapes in myelodysplastic neoplasms: Associations with mutational signatures and disease progression

open access: yesMolecular Oncology, EarlyView.
In this explorative study, the abundance of circular RNA molecules in bone marrow stem cells was found to be elevated in patients with high‐risk myelodysplastic neoplasms, and to be associated with an increased risk of progression to acute myeloid leukemia.
Eileen Wedge   +17 more
wiley   +1 more source

Fossil wood from the Permian-Triassic Beaufort Group of South Africa’s Karoo Basin: Implications for palaeoclimate

open access: yesEarth History and Biodiversity
Tree-growth rings act as high-resolution climate proxies because wood anatomy is directly related to water uptake and tree growth. 190 silicified wood samples representing three taxa from the main Karoo Basin of South Africa were analysed. These samples (
Simoné Kock, Marion K. Bamford
doaj   +1 more source

Growth and Relations in Graded Rings

open access: yes, 1999
Suppose $A$ is a graded associative algebra over a field, $I$ is its ideal generated by a set $α$ of homogeneous elements, and B = A/I. In this note, some inequalities between Hilbert series of algebras $A,B$ and the number of elements of the set $α$ are announced. As in the Golod--Shafarevich inequality as in our case the equality in every estimate is
openaire   +2 more sources

IMPDH inhibition enhances cytarabine efficacy in SAMHD1‐expressing leukaemia cells via guanine nucleotide depletion

open access: yesMolecular Oncology, EarlyView.
Cytarabine is a key therapy for acute myeloid leukaemia (AML), but its efficacy is limited by the dNTPase SAMHD1, which hydrolyses its active metabolite. Screening nucleotide biosynthesis inhibitors revealed that IMPDH inhibitors selectively sensitise SAMHD1‐proficient AML cells to cytarabine.
Miriam Yagüe‐Capilla   +9 more
wiley   +1 more source

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