Výsledky vyhledávání - "Bekkum, H. Van"

Stepwise Dealumination of Zeolite Beta at Specific T-sites Observed with 27Al MAS and 27Al MQ MAS NMR

Autor: Koningsberger, D.C., Bokhoven, J.A. van, Kunkeler, P.J., Bekkum, H. van, Kentgens, A.P.M.

Publikováno v: Journal of the American Chemical Society, 122(51), 12842. American Chemical Society

Using 27Al MAS and 27Al MQ MAS NMR, dealumination of zeolite H-Beta has been observed at specific T-positions in the framework. 27Al MQ MAS NMR is able to resolve aluminum in the T1 and T2 positions from the other (T3 - T9) positions in the framework

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::0c4e821ce26dfe23f3615306fb803023
https://dspace.library.uu.nl/handle/1874/5941

Zobrazit plný text záznamu

Methods for the Selective Oxidation of Cellulose: Preparation of 2,3-Dicarboxycellulose and 6-Carboxycellulose

Autor: Besemer, A.C., Nooy, A.E.J. de, Bekkum, H. van

Publikováno v: ACS Symposium Series, 688, 73-82

Three methods for the selective oxidation of cellulose are described. The classical method consists of consecutive oxidation with sodium periodate, leading to 2,3-dialdehyde cellulose and sodium chlorite, giving 2,3-dicarboxy cellulose. This material

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::7189ebf68cc1eea8995f440bee65e329
http://resolver.tudelft.nl/uuid:19d8cb98-cb52-4d9a-b31e-c55011e03eda

Zobrazit plný text záznamu

Method for preparation of a calcium-binding polydicarboxy-inulin and its use as replacement for phosphates in detergents

Autor: Besemer, A.C., Bekkum, H. van

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::bf6f10588a5784e7ceda13d978ccae6c
http://resolver.tudelft.nl/uuid:6a6458f1-b910-452e-90e2-510078e242ec

Zobrazit plný text záznamu

Calcium sequestering agents based on carbohydrates

Autor: Besemer, A.C., Bekkum, H. van

Publikováno v: Carbohydrates as organic raw materials III, 273-294

Present-day West-European builder systems in detergent formulations often consist of zeolite NaA together with a synthetic polycarboxylate. The latter materials are nonbiodegradable and substitutes should be considered. Carbohydrates seem attractive

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::02f026b1318de87638b9e4bf32d844c2
http://resolver.tudelft.nl/uuid:9dc4f4a9-799f-4bbe-8b00-e0f7d158ebc2

Zobrazit plný text záznamu

Selective oxidation of primary alcohols mediated by nitroxyl radical in aqueous solution. Kinetics and mechanism

Autor: Nooy, A.E.J. de, Besemer, A.C., Bekkum, H. van

Publikováno v: Tetrahedron, 29, 51, 8023-8032

The kinetics of the TEMPO-mediated oxidation of methyl α-D- glucopyranoside to sodium methyl α-D-glucopyranosiduronate were studied. An intermediate was found which was identified as the hydrated aldehyde. This was oxidised in the same manner as th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::85e68cfa59887f9c03792d3275c296ff
http://resolver.tudelft.nl/uuid:7a3922a7-3422-4ded-aa06-954ec70a56e3

Zobrazit plný text záznamu

Highly selective nitroxyl radical-mediated oxidation of primary alcohol groups in water-soluble glucans

Autor: Nooy, A.E.J. de, Besemer, A.C., Bekkum, H. van

Publikováno v: Carbohydrate Research, 1, 269, 89-98

With catalytic amounts of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and hypochlorite/bromide as the regenerating oxidant in water, primary alcohol groups in glucans and derivatives thereof were rapidly and completely oxidised. For pyranosides, sel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a8fa8a851f00cba0d5c357552cbcbc23
http://resolver.tudelft.nl/uuid:e3d02e40-02d4-45a9-b836-d1ccbf1bde20

Zobrazit plný text záznamu