Results 21 to 30 of about 9,094 (177)

Normatiwiteit versus neutraliteit in die handelswetenskappe

open access: yesKoers : Bulletin for Christian Scholarship, 1974
Die sondeval van die mens het ’n tydperk van stryd ontsluit; dit is die stryd tussen die mag van die lig en die mag van die duisiternis wat hom telkens in nuwe en meer manifestasies openbaar het.
W. J. Venter
doaj   +1 more source

The importance of validated alpha taxonomy for phylogenetic and DNA barcoding studies: a comment on species identification of pygmy grasshoppers (Orthoptera, Tetrigidae)

open access: yesZooKeys, 2017
In a recently published paper on colour polymorphism in a Pygmy grasshopper from China (Zhao et al 2016) an unidentified Paratettix sp. was misidentified as Tetrix bolivari. This case highlights the need for correct species identification and provides an
Arne Lehmann   +5 more
doaj   +3 more sources

First occurrence of the Ponto-Caspian amphipod Echinogammarus trichiatus (Martynov, 1932) (Crustacea: Gammaridae) in Belgium [PDF]

open access: yes, 2012
The Ponto-Caspian amphipod species Echinogammarus trichiatus (Martynov, 1932) was found in Belgium for the first time in June 2009 at two different locations in an artificial lake bordered by two large canals.
Boets, Pieter   +5 more
core   +2 more sources

From Plastic Waste to Pharmaceutical Precursors: PET Upcycling Through Ruthenium Catalyzed Semi‐Hydrogenation

open access: yesAngewandte Chemie, Volume 138, Issue 5, 28 January 2026.
We present a new catalytic process that converts real‐life PET waste into ethyl 4‐hydroxymethylbenzoate (EHMB), which serves as a valuable intermediate for the synthesis of pharmaceuticals, an insecticide, and a novel polyester. Abstract We report here the upcycling of PET (polyethylene terephthalate) waste via semihydrogenation to make ethyl 4 ...
Pavel S. Kulyabin   +12 more
wiley   +2 more sources

A vertebra of a small species of Pachycetus from the North Sea and its inner structure and vascularity compared with other basilosaurid vertebrae from the same site [PDF]

open access: yesPeerJ
In the Western Scheldt Estuary near the Belgian-Dutch border, middle to late Eocene strata crop out at the current seafloor. Most vertebrae of large Eocene basilosaurid taxa from this area were previously described in several papers. They represent three
Henk Jan van Vliet   +5 more
doaj   +2 more sources

Description of Cithaeron dippenaarae sp. n. from Morocco (Araneae: Cithaeronidae) [PDF]

open access: yes, 2015
Cithaeron dippenaarae sp. n. is described from both sexes.
Bosmans, Robert, van Keer, Johan
core   +2 more sources

NO3− anions can act as Lewis acid in the solid state

open access: yesNature Communications, 2017
The nitrate anion, NO3−, is typically thought of as an electron-donating molecular moiety. Here the authors reveal, however, that when the negative charge on NO3−is smeared out over a large enough area, a positive potential emerges on N that can act as a
Antonio Bauzá   +2 more
doaj   +1 more source

On some new or rare spider species from Lesbos, Greece (Araneae: Agelenidae, Amaurobiidae, Corinnidae, Gnaphosidae, Liocranidae) [PDF]

open access: yes, 2011
In this paper, three new spider species are described from the Greek Aegean island Lesbos: Tegenaria maelfaiti sp. nov. (Agelenidae), Amaurobius lesbius sp. nov. (Amaurobiidae) and Agroeca parva sp. nov.
Bosmans, Robert
core   +2 more sources

Ligand‐specific tuning of CLEC10A signalling strength and dendritic cell responses through engagement of different GalNAc‐containing glycan structures

open access: yesThe FEBS Journal, EarlyView.
The authors investigated the effects of various glycan ligands for CLEC10A, a lectin receptor expressed on dendritic cells (DCs). Monocyte‐derived DCs were stimulated with glycan‐conjugated dendrimers in combination with the TLR1/2 ligand Pam3CysK4, and responses were investigated at the mRNA and protein level.
Nadia L. van der Meijs   +7 more
wiley   +1 more source

Wiskunde, mystiek en natuurwetenschappen [PDF]

open access: yes, 2009
Contains fulltext : 75546.pdf (author's version ) (Open Access)
Barendregt, H.P., Barendregt, H.P.
openaire   +2 more sources

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