be the generalized Fibonacci polynomial. There are a few papers in the literature in which the distribution of the roots of fn is considered. For example, from [5] and [6] we know that there exists a unique positive root θ of fn, which is larger than 1, and all the other roots of fn have modulus less than 1. Moreover, if n is odd, then fn has only one real root, while if n is even, fn has exact...

21S Gly-Asp)-containing peptides inhibited branching of lung rudiments, which suggested involvement of integrin extracellular matrix receptors.t Incubation of li-d-old lung rudiments in the presence of exogenous FN resulted in impairment Of lung branching (14 new branching points, compared to more than 20 in controls). Moreover, dissociated cells from 11and 13-d embryos attached and spread on F...

  Background: Postmenopausal onset rheumatoid arthritis (post-RA) is expected to have greater bone mineral density (BMD) loss than premenopauasal onset (pre-RA) due to estrogen deficiency and aging. This study aimed to compare the BMD status of the two RA groups with age-matched non-RA controls.   Methods: The patients with RA on follow-up examination were stratified according to age of onset. ...

  Abstract   Background: Postmenopausal onset rheumatoid arthritis (post-RA) is expected to have greater bone mineral density (BMD) loss than premenopauasal onset (pre-RA) due to estrogen deficiency and aging. This study aimed to compare the BMD status of the two RA groups with age-matched non-RA controls.   Methods: The patients with RA on follow-up examination were stratified according to age...

We prove the so-called Addition Theorem for algebraic entropy of actions cancellative right amenable monoids S on discrete abelian groups A by endomorphisms, under hypothesis that is locally monotileable (that is, admits a Følner sequence (Fn)n?N such Fn monotile Fn+1 every n?N). study in details class groups, also relation with already existing notions monotileability introduced B. Weiss and d...

During the early phase of wound healing, first plasma fibronectin (FN) and then in situ FN are deposited at the site of injury. In situ FN--FN made by tissue cells at the injury site--often contains an extra domain A (EDA) insert. Multiple wound-related signal transduction pathways control the deposition of EDA FN, and the EDA insert can in turn trigger pathways that induce inflammation, increa...

Let G be a countable discrete amenable group which acts continuously on a compact metric space X and let μ be an ergodic G−invariant Borel probability measure on X. For a fixed tempered Følner sequence {Fn} inG with lim n→+∞ |Fn| logn =∞, we prove the following variational principle: h(Gμ, {Fn}) = hμ(X,G), where Gμ is the set of generic points for μ with respect to {Fn} and h(Gμ, {Fn}) is the B...

Initiation of fibronectin (FN) matrix assembly is dependent on specific interactions between FN and cell surface integrin receptors. Here, we show that de novo FN matrix assembly exhibits a slow phase during initiation of fibrillogenesis followed by a more rapid growth phase. Mn2+, which acts by enhancing integrin function, increased the rate of FN fibril growth, but only after the initial lag ...

We have investigated the effect of plasma fibronectin (Fn) on binding and phagocytosis of sheep erythrocytes (E) by human peripheral blood monocytes. Unopsonized E were not phagocytosed in the absence or presence of Fn, but Fn enhanced the phagocytosis of E bearing IgG. Sheep erythrocytes sensitized with IgM and C3b were ingested only when monocytes were exposed to Fn. The Fn enhancement of pha...

In the past 2 decades, it has been appreciated that the functions of the extracellular matrix (ECM) are not entirely structural. ECM components interact with specific adhesion receptors on cell surfaces and regulate various cellular functions, including differentiation, proliferation, migration, and apoptosis. Fibronectin (FN) is a paradigm adhesive protein, nonreactive with adhesion receptors ...