نتایج جستجو برای: co pi matrix

تعداد نتایج: 725636  

Journal: :Annals of diagnostic pathology 2006
Lars-Cristian Horn Christine E Richter Bettina Hentschel Alexander Schütz Henryk Pilch Cornelia Leo Michael Höckel

There are different types of tumoral growth patterns invading host tissue. During tumor infiltration, cancer cells not only destroy the pre-existing extracellular matrix, but usually induce new matrix formation by activating the peritumoral stromal cells; that is, desmoplastic stromal reaction (DSR) at the front of invasion (juxtatumoral stroma). This study evaluates the association between dif...

Journal: :Journal of experimental botany 2004
José Manuel Franco-Zorrilla Esperanza González Regla Bustos Francisco Linhares Antonio Leyva Javier Paz-Ares

Plants have evolved an array of responses that adapt their growth to conditions of limited phosphate (Pi) supply. These involve biochemical and developmental changes that improve Pi acquisition and recycling, and protect against the stress of Pi starvation. The induction of these responses requires a sophisticated regulatory system that integrates information on external and internal plant Pi s...

Journal: :The Biochemical journal 1989
N Aiyar C F Bennett P Nambi W Valinski M Angioli M Minnich S T Crooke

Vasopressin V1 receptors were solubilized from rat liver plasma membranes with the detergent lysophosphatidylcholine. [[3H]Arginine]vasopressin (AVP) binding to the solubilized preparations was specific and saturable, with a dissociation constant of 0.6 nM. Cross-linking of [125I]vasopressin to the solubilized fraction, studied by SDS/polyacrylamide-gel-electrophoretic analysis, demonstrated th...

2008
Arkady Berenstein

Let A be an arbitrary symmetrizable Cartan matrix of rank r, and n = n+ be the standard maximal nilpotent subalgebra in the Kac-Moody algebra associated with A (thus, n is generated by E1, . . . , Er subject to the Serre relations). Let Ûq(n) be the completion (with respect to the natural grading) of the quantized enveloping algebra of n. For a sequence i = (i1, . . . , im) with 1 ≤ ik ≤ r, let...

Journal: :Logical Methods in Computer Science 2023

We study the expressive power and complexity of second-order revised Krom logic (SO-KROM$^{r}$). On ordered finite structures, we show that its existential fragment $\Sigma^1_1$-KROM$^r$ equals $\Sigma^1_1$-KROM, captures NL. all for $k\geq 1$, $\Sigma^1_{k}$ $\Sigma^1_{k+1}$-KROM$^r$ if $k$ is even, $\Pi^1_{k}$ $\Pi^1_{k+1}$-KROM$^r$ odd. The result gives an alternative to capture polynomial h...

Journal: :Journal of the American Chemical Society 2001
A Kuznetsova I Popova J T Yates M J Bronikowski C B Huffman J Liu R E Smalley H H Hwu J G Chen

Single-walled nanotubes (SWNTs) produced by plasma laser vaporization (PLV) and containing oxidized surface functional groups have been studied for the first time with NEXAFS. Comparisons are made to SWNTs made by catalytic synthesis over Fe particles in high-pressure CO, called HiPco material. The results indicate that the acid purification and cutting of single-walled nanotubes with either HN...

1999
In Chan Kim

A generalized Brownian motion simulation technique developed by Kim and Torquato [J. Appl. Phys. 68, 3892 ( 1990) ] is applied to compute “exactly” the effective conductivity a, of heterogeneous media composed of regular and random distributions of hard spheres of conductivity a, in a matrix of conductivity (pi for virtually the entire volume fraction range and for several values of the conduct...

S. R. Allahkaram, Z. Shahri,

Metal matrix nano composite coatings possess enhanced properties such as corrosion and wear resistance. This paper aims to study the corrosion behavior of pure Co and Co-BN nano composite coatings deposited with different particles concentration (5-20 g L-1) on copper substrates using electroplating technique. Morphology and elemental compositions of the coatings were investigated by means of s...

Journal: :Current Biology 1998
Traci Zell Christopher S. Warden Anissa S.H. Chan Molly E. Cook Cheryl L. Dell Stephen W. Hunt Yoji Shimizu

Background: Leukocyte activation results in a rapid increase in adhesion to the extracellular matrix due to the activation of β1 integrin receptors. A role for phosphatidylinositol (PI) 3-kinase in integrin activation has been proposed, as activation of integrins by many receptors can be blocked by PI 3-kinase inhibitors. One receptor that regulates integrins is the CD28 surface antigen; here, ...

Journal: :The Journal of Experimental Medicine 1987
C Barbey-Morel J A Pierce E J Campbell D H Perlmutter

alpha 1 Proteinase inhibitor (PI) is the principle inhibitor of neutrophil elastase, an enzyme that degrades many components of the extracellular matrix. Expression and regulation of alpha 1 PI, therefore, affects the delicate balance of elastase and antielastase, which is critical to turnover of connective tissue during homeostasis, tissue injury, and repair. In this study we show that express...

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