منابع مشابه
Pistillate Flower Abscission (pfa)
PFA was not different with shaded vs. exposed limbs of the same trees nor between shaded interior trees and outside ones with high light exposure. Tehama trees expressed lower PFA than adjacent Serre PFA of Tehama was also low at a site where Serr trees (removed 1982) had very high drop the previous three years. Fruitfulness of all monitored limbs in 1982 ranged from 6 to 97% and the earlier co...
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Ependymal tumours are uncommon neoplasms of the central nervous system. Basic molecular alterations underlying their development are not so well defined in contrast to the astrocytic tumours. We compiled literature data on the molecular changes in ependymomas to show clinical and pathological correlations and review the prognostic factors that may much better predict their clinical behaviour.
متن کاملNervous system: Ependymomas
Ependymomas are well-delineated moderately cellular gliomas. Histolological features are perivascular pseudo rosettes and ependymal rosettes. WHO classification differentiate four major types: 1. Ependymoma and variants (grade II): Cellular ependymoma: a variant of ependymoma with conspicuous cellularity but often less prominent pseudo-rosette or rosette formation. Papillary ependymoma: a rare ...
متن کاملPfa(s) and Countable Tightness
Todorcevic introduced the forcing axiom PFA(S) and established many consequences. We contribute to this project. In particular, we consider status under PFA(S) of two important consequences of PFA concerning spaces of countable tightness. In particular we prove that the existence of a Souslin tree does not imply the existence of a compact non-sequential space of countable tightness. We contrast...
متن کاملA Combinatorial Algorithm for Pfa
The Pfaaan of a graph is closely linked to Perfect Matching. It is also naturally related to the determinant of an appropriately deened matrix. This relation between Pfaaan and determinant is usually exploited to give a fast algorithm for computing Pfaaans. We present the rst completely combinatorial algorithm for computing the Pfaaan in polynomial time. In fact, we show that it can be computed...
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ژورنال
عنوان ژورنال: Neuro-Oncology
سال: 2019
ISSN: 1522-8517,1523-5866
DOI: 10.1093/neuonc/noz194