Results 51 to 60 of about 45,782 (275)

On Total Positivity of the Discrete Spline Collocation Matrix

Journal of Approximation Theory, 1996
\textit{R. Q. Jia} [J. Approximation Theory 39, 11-23 (1983; Zbl 0515.41010)] proved that the discrete B-spine collocation matrix is totally positive, and he also gave necessary and sufficient conditions for a minor to be strictly positive. By a counterexample, it is shown in this paper that Jia's necessary and sufficient conditions are not quite ...
openaire   +1 more source

Eigenvalue Localization for Symmetric Positive Toeplitz Matrices

Axioms
Given a real symmetric matrix, several inclusion and exclusion intervals containing its eigenvalues can be given. In this paper, for symmetric positive Toeplitz matrices, we provide an inclusion interval and, under an additional hypothesis, we also give ...
Juan M. Peña
doaj   +1 more source

Totally nonpositive completions on partial matrices [PDF]

, 2006
An n £ n real matrix is said to be totally no positive if every minor is no positive. In this paper, we are interested in totally no positive completion problems, that is, does A partial totally no positive matrix have a totally no positive matrix ...
Araújo, C. Mendes, Torregrosa, Juan R., Urbano, Ana M.   +2 more
core   +1 more source

Role of CX3CR1 receptor in monocyte/macrophage driven neovascularization.

PLoS ONE, 2013
Monocyte/macrophages are implicated in initiation of angiogenesis, tissue/organ perfusion and atherosclerosis biology. We recently showed that chemokine receptor CX(3)CR1 is an essential regulator of monocyte/macrophage derived smooth muscle cell ...
Arun H S Kumar, Kenneth Martin, Elizebeth C Turner, Chirlei K Buneker, Karim Dorgham, Philippe Deterre, Noel M Caplice   +6 more
doaj   +1 more source

Geology, mineralogy, structure and texture, geochemistry and genesis of the Golestan Abad iron oxide- apatite deposit (East of Zanjan)

Journal of Economic Geology, 2020
Introduction Iron oxide-apatite deposits (IOA) are considered to be Kirune-type iron ores which have been formed during Proterozoic to Tertiary eras in different parts of the world.
Shiva Kordian, Mir Ali Asghar Mokhtari, Hossein Kouhestani, Somayeh Veiseh   +3 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Totally positive bases and progressive iteration approximation [PDF]

, 2005
In this paper, we study the progressive iteration approximation property of a curve (tensor product surface) generated by blending a given data point set and a set of basis functions.
Lin, Hong-Wei, Bao, Hu-Jun, Wang, Guo-Jin   +2 more
core   +1 more source

A consensus bacterial 6-phytase variant maintained growth, bone quality and carcass characteristics of broilers fed corn-soy diets without added inorganic phosphate and with a full matrix applied, during 0 to 42 days of age

Journal of Applied Poultry Research
Summary: Inorganic phosphate (iP) is added to broiler diets to meet phosphorus (P) requirements, but it is expensive and reduces production sustainability.
A. Bello, E.B. Sobotik, G.S. Archer, L. Marchal, Y. Dersjant-Li, J. Remus   +5 more
doaj   +1 more source

TRIMETAZIDINE INFLUENCE ON FILTRATION AND TUBULOINTERSTITIAL FUNCTION OF KIDNEYS IN ISCHEMIC HEART DISEASE PATIENTS WITH CHRONIC HEART FAILURE AND RENAL DYSFUNCTION

Российский кардиологический журнал, 2018
Aim.  Evaluation of trimetazidine influence on the parameters of filtration and tubulo-interstinal function of kidneys in angina patients of II-III functional class (FC) and stable chronic heart failure (CHF) of II-III FC with chronic kidney disease (CKD)
N. A. Koziolova, I. I. Kolegova, M. V. Surovtseva   +2 more
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

FEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson, Tomáš Gedeon, Mauricio Garcia Benitez, Campbell Putnam, William R. Harcombe, Radhakrishnan Mahadevan, Ashley E. Beck   +6 more
wiley   +1 more source