Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Christopher T. G. Knight"'
Publikováno v:
Angewandte Chemie International Edition. 51:9900-9903
Conspicuous absence: (29)SiNMR studies show that highly condensed, four-coordinate Si-containing anions are common in concentrated alkali-metal silicate solutions, but reveal no evidence for the existence of specialized zeolite building units. The re
Publikováno v:
Angewandte Chemie. 119:8296-8300
Autor:
Gad G. Yousef, Muriel Cuendet, Mary Ann Lila, Tristan F. Burns Kraft, Young Hwa Kang, John M. Pezzuto, David S. Seigler, Barbara M. Schmidt, Christopher T. G. Knight
Publikováno v:
Journal of Food Science. 70:S159-S166
Wild lowbush blueberry fruit extract was fractionated using vacuum chromatography and analyzed for chemopreventive potential using bioassays that test the ability of compounds to inhibit the initiation, promotion, and progression stages of carcinogen
Publikováno v:
Plant, Cell and Environment. 27:51-54
The chemical speciation of silicon in xylem exudate from wheat (Triticum aestivum L.) was examined by 29Si NMR spectroscopy. Wheat plants were grown to maturity in silicon-free nutrient medium, and then transferred to a solution containing 0.02 mm29S
Publikováno v:
The Journal of Physical Chemistry B. 106:3329-3332
Publikováno v:
Inorganic Chemistry. 37:4278-4283
The kinetics of formation of the silicate cubic octamer, Q(3)(8), in aqueous tetramethylammonium (TMA) silicate solutions was investigated by (29)Si NMR. The rate equation for solutions at pH 13.2-13.6 is d[Q(3)(8)]/dt = k(f) [H(+)](1.6)(+/-)(0.1)[TM
Publikováno v:
The Journal of Physical Chemistry. 100:18351-18356
We report the results of a wide ranging 29Si longitudinal (spin−lattice) relaxation study of aqueous alkali-metal silicate solutions. Measurement and interpretation of relaxation rates for the many chemically distinct Si centers found in these solu
Publikováno v:
Journal of the Chemical Society, Dalton Transactions. :1250-1252
Two novel silicate anions, a singly-substituted cubic octamer (double four-ring cage with a pendant orthosilicate group) and its dimeric counterpart (two octameric cages linked by a single siloxane bridge), are detected by 29Si NMR spectroscopy in co
Publikováno v:
Journal of Non-Crystalline Solids. 116:140-144
The application of two-dimensional silicon-29 homonuclear shift correlated magic angle spinning nuclear magnetic resonance (COSY MAS NMR) spectroscopy to silicate glasses prepared using silica isotopically enriched in silicon-29 is reported. Two sodi
Publikováno v:
Physical chemistry chemical physics : PCCP. 8(26)
The authors of a recent report in this journal (Houssin, et al., Phys. Chem. Chem. Phys., 2003, 5, 3518, ) claim that a tetrapropylammonium (TPA) silicate mixture with molar composition 4.41 TPAOH : 10 SiO(2) : 117 H(2)O contains high concentrations