Results 21 to 30 of about 1,000 (183)

De natuurwetenschappen in het Sovjet-onderwijs

Pedagogische Studiën, 1974
Array
A.J. Treffers
doaj   +4 more sources

Normatiwiteit versus neutraliteit in die handelswetenskappe

Koers : 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)

ZooKeys, 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, Hendrik Devriese, Josef Tumbrinck, Josip Skejo, Gerlind U.C. Lehmann, Axel Hochkirch   +5 more
doaj   +3 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]

PeerJ
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, Mark E.J. Bosselaers, Dirk K. Munsterman, Marcel L. Dijkshoorn, Jeffrey Joël de Groen, Klaas Post   +5 more
doaj   +2 more sources

Wiskunde, mystiek en natuurwetenschappen [PDF]

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

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

Nature 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, Antonio Frontera, Tiddo J. Mooibroek   +2 more
doaj   +1 more source

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

Angewandte 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, James Luk, Evgeny A. Uslamin, Alexander A. Kolganov, Garima Saini, Raymundo Marcial‐Hernandez, Ketan Pancholi, Benjamin Kühne, Alexander Dauth, Aidan P. McKay, David B. Cordes, Evgeny A. Pidko, Amit Kumar   +12 more
wiley   +2 more sources

Stabilization of Cu Species in UiO‐66 Metal–Organic Framework for CO2‐to‐Methanol: Insights From Operando X‐ray and Electron Microscopy Studies

Small, Volume 22, Issue 48, 26 August 2026.
This study reveals how a zirconium‐based metal–organic framework (UiO‐66) stabilizes copper species during CO2 hydrogenation to methanol. Operando X‐ray spectroscopy, electron microscopy, and theory show that zinc promotes highly dispersed copper and suppresses particle growth, while the framework dynamically responds to reaction intermediates.
Anna Liutkova, Fabio André Peixoto Esteves, Marianela López Romero, Margareth S. Baidun, Anastasia Molokova, Davide Salusso, Kirill A. Lomachenko, Andrea Testino, Alexander A. Kolganov, Evgeny A. Pidko, Emiliya Poghosyan, Marco Ranocchiari   +11 more
wiley   +1 more source

A New Bowhead Whale-like Genus from the Early Pliocene of Antwerpen Illuminates Phylogenetic Relationships and Body Size Evolution in Balaenidae (Cetacea, Mysticeti)

Geosciences
Right and bowhead whales represent key species in modern-day marine ecosystems because of their capacity to catch enormous amounts of prey items (especially calanoid copepod crustaceans).
Michelangelo Bisconti, Mark Bosselaers
doaj   +1 more source

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

The FEBS Journal, Volume 293, Issue 11, Page 3187-3210, June 2026.
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, Remi Hatinguais, Mike de Kok, R. J. Eveline Li, Tesfay M. Godefa, Victor L. J. L. Thijssen, Yvette van Kooyk, Sandra J. van Vliet   +7 more
wiley   +1 more source