Results 41 to 50 of about 43,577,290 (194)

A Framework to Unify the Relationship Between Numerical Abundance, Biomass, and Environmental DNA

open access: yesEnvironmental DNA, Volume 7, Issue 2, March/April 2025.
Whether eDNA correlates more strongly with numerical abundance or biomass remains an outstanding question. We resolve this issue by demonstrating, using frameworks developed from metabolic ecology, that eDNA data can be adjusted to simultaneously reflect both parameters.
Matthew C. Yates   +4 more
wiley   +1 more source

Significance of land management practices under haskap orchards to mitigate the degradations of soil organic carbon stocks and soil health because of land use changes from forest and grassland

open access: yesSoil Use and Management, Volume 41, Issue 1, January‐March 2025.
Abstract Managing the impact of land use change (LUC) in soil organic carbon (SOC) and soil health is imperative while climate change (CC) and food security are in concern. Land management practices in major land uses play a vital role in maintaining SOC concentrations and soil health.
Biplab Brahma   +4 more
wiley   +1 more source

Multiple‐dimensioned defect engineering for graphite felt electrode of vanadium redox flow battery

open access: yesCarbon Energy, Volume 6, Issue 2, February 2024.
An ultra‐homogeneous modification was used for multiple‐dimensioned defect engineering of graphite felt electrodes for a vanadium redox flow battery. Graphite felt obtains nano‐scale etching and atom‐scale N/O co‐doping. The electrode offers a larger surface area, more active sites, and better hydrophilicity for both VO2+/VO2+ and V3+/V2+ redox ...
Yingqiao Jiang   +9 more
wiley   +1 more source

On the role of pre and post-processing in environmental data mining [PDF]

open access: yes, 2008
The quality of discovered knowledge is highly depending on data quality. Unfortunately real data use to contain noise, uncertainty, errors, redundancies or even irrelevant information.
Athanasiadis, Ioannis   +5 more
core   +1 more source

Three-body resonances Lambda-n-n and Lambda-Lambda-n

open access: yes, 2007
Possible bound and resonant states of the hypernuclear systems $\Lambda nn$ and $\Lambda\Lambda n$ are sought as zeros of the corresponding three-body Jost functions calculated within the framework of the hyperspherical approach with local two-body S ...
Afnan   +33 more
core   +1 more source

N,N'-(p-Phenylene)dibenzamide (PPDB) [PDF]

open access: yes, 1977
C20N202H16, monoclinic, P2~/c, a = 18.065(1), b = 5.247(1), c = 8.027(1) A, fl = 93.99 (1) °, Z = 2. The crystal structure has been refined by least-squares techniques. R w = 7.3%.
Gaymans, R.J., Harkema, S.
core   +4 more sources

Análisis acústico de formantes en las intersecciones de Ai/ con oclusivas asimiladas

open access: yesCuadernos de Lingüística Hispánica, 2019
Este artículo averigua cuál es el trazo en el espectrograma de los recorridos de los formantes primero y segundo, en las intersecciones de los segmentos de /n/ seguida por consonante oclusiva bilabial y velar en secuencias de asimilación regresiva ...
CARLOS CÉSAR CASAS ORTIZ   +1 more
doaj   +1 more source

N,N,N′-Trimethyl-N′′-(4-nitrophenyl)-N′-phenylguanidine [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2014
The C—N bond lengths in the guanidine unit of the title compound, C16H18N4O2, are 1.298 (2), 1.353 (2) and 1.401 (3) Å, indicating double- and single-bond character. The N—C—N angles are 115.81 (16), 118.90 (18) and 125.16 (18)°, showing a deviation of the CN3plane from an ideal trigonal–planar geometry.
Ioannis Tiritiris   +2 more
openaire   +3 more sources

$n!$ matchings, $n!$ posets [PDF]

open access: yesProceedings of the American Mathematical Society, 2011
We show that there are $n!$ matchings on $2n$ points without, so called, left (neighbor) nestings. We also define a set of naturally labeled $(2+2)$-free posets, and show that there are $n!$ such posets on $n$ elements. Our work was inspired by Bousquet-Mélou, Claesson, Dukes and Kitaev [J. Combin. Theory Ser. A. 117 (2010) 884--909].
Claesson, Anders, Linusson, Svante
openaire   +3 more sources

Obituaries / Nécrologies [PDF]

open access: yes, 2020
WILLIAM RODNEY 5 January 1923 – 26 March 2012 DFC, BA, MA, PhD, FRGS, FR.Hist.S., Professor ...

core  

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