Results 81 to 90 of about 4,754,290 (301)

Reflectance spectra from a white staminate-phase flower, Pinkness Index (PI) = 0.0764 (A) and a pink pistillate-phase flower, PI = 0.4896 (B) of Saponaria officinalis.

open access: yes, 2014
Reflectance spectra from a white staminate-phase flower, Pinkness Index (PI) = 0.0764 (A) and a pink pistillate-phase flower, PI = 0.4896 (B) of Saponaria officinalis.
Sandra L. Davis (545643)   +6 more
core   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices   +3 more
wiley   +1 more source

On the extremal graphs with respect to the vertex PI index

open access: yesApplied Mathematics Letters, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +1 more source

SENSITIVITY AND SPECIFICITY OF PULSATILITY INDEX UMBILICAL ARTERY AND MIDDLE CEREBRAL ARTERY IN DETECTING INTRA UTERINE GROWTH RESTRICTION

open access: yesPakistan Armed Forces Medical Journal, 2014
Objective: To determine the sensitivity and specificity of the pulsatile index in umbilical artery (PI-UA) and pulsatile index in middle cerebral artery (PI-MCA) in detecting IUGR by comparing it with the birth weight.
Muhammad Nafees   +2 more
doaj   +2 more sources

The structure of a finite group and the maximum $\pi$-index of its elements [PDF]

open access: yes
Given a set of primes $\pi$, the $\pi$-index of an element $x$ of a finite group $G$ is the $\pi$-part of the index of the centralizer of $x$ in $G$. If $\pi=\{p\}$ is a singleton, we just say the $p$-index.
Vasil'ev, Andrey V., Liu, A-Ming
core  

Vertex and edge PI indices of Cartesian product graphs

open access: yes, 2007
The Padmakar–Ivan (PI) index of a graph G is the sum over all edges uv of G of the number of edges which are not equidistant from u and v. In this paper, the notion of vertex PI index of a graph is introduced.
M.H. Khalifeh   +5 more
core   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

Scatter plot showing the correlation between mean middle cerebral artery pulsatility index (PI) and resistivity index (RI), and pollutant standards index (PSI).

open access: yes, 2019
Scatter plot showing the correlation between mean middle cerebral artery pulsatility index (PI) and resistivity index (RI), and pollutant standards index (PSI).
Bridget S. Ng (6180464)   +17 more
core   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Gestational age (GA)-specific longitudinal reference centiles for ductus venosus pulsatility index (DV-PI).

open access: yes, 2019
Gestational age (GA)-specific longitudinal reference centiles for ductus venosus pulsatility index (DV-PI).
Maria Angela Rustico (8098529)   +7 more
core   +1 more source

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