Zobrazeno 1 - 10
of 367
pro vyhledávání: '"GARY E. MACIEL"'
Publikováno v:
NMR of Humic Substances and Coal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b402efe85469249081d8911947669e01
https://doi.org/10.1201/9781003069805-3
https://doi.org/10.1201/9781003069805-3
Autor:
Paul D. Ellis, Gary E. Maciel
For a variety of reasons, silica and alumina structures are important frameworks for the subject of heterogeneous catalysis. Aluminas, and perhaps to a lesser extent silicas, are employed directly as cracking catalysts or as substrates for assorted c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::124afe53df202d3ed92e91615aa5bd5b
https://doi.org/10.1201/9781003067238-5
https://doi.org/10.1201/9781003067238-5
Publikováno v:
Energy & Fuels. 25:2301-2313
In situ 13C NMR measurements are reported on 13C-enriched powdered poplar wood that is subjected to pretreatment with 0.5 M sulfuric acid as a function of time and at two temperatures. 13C MAS (mag...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e96f67ab1f5d9814d0acec4680947a3d
https://doi.org/10.1021/ef2000213
https://doi.org/10.1021/ef2000213
Molecular-Level Consequences of Biomass Pretreatment by Dilute Sulfuric Acid at Various Temperatures
Autor:
Lesley Holmes, Takeshi Kobayashi, Rebecca A. Faulkner, Benjamin L. Kohn, Gary E. Maciel, Mark F. Davis
Publikováno v:
Energy & Fuels. 25:1790-1797
Ex situ room-temperature 13C nuclear magnetic resonance (NMR) measurements are reported on powdered poplar wood that has been pretreated with dilute sulfuric acid (concentrations up to 1 wt %) for times ranging up to 20 min and at temperatures of 120
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d289a595c388181bd43c6a6f7b68dc9e
https://doi.org/10.1021/ef1017219
https://doi.org/10.1021/ef1017219
Publikováno v:
The Journal of Physical Chemistry C. 112:4315-4326
The molecular dynamics of the silanols of high surface-area silica gel was studied using solid-state deuterium NMR spectroscopy. Deuterated silica gel samples were prepared by replacement of the exchangable silanol protons upon exposure to liquid 2H2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d82a94596f2d652a7ad9b25e6ac2fe4
https://doi.org/10.1021/jp709759e
https://doi.org/10.1021/jp709759e
Publikováno v:
The Journal of Physical Chemistry C. 111:5982-5989
The molecular dynamics of pyridine adsorbed onto dry high-surface-area silica gel was studied using solid-state deuterium NMR spectroscopy. Selectively and totally deuterated pyridine samples were used to identify the spectral signatures associated w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d186e7165b0dc6170febe1bf1cd4621
https://doi.org/10.1021/jp067353q
https://doi.org/10.1021/jp067353q
Publikováno v:
Journal of the American Chemical Society. 128:17093-17101
The reaction of trimethylaluminum and dry, high-surface-area (500 m2/g) silica gel in a mixed slurry was studied using multinuclear, solid-state NMR spectroscopy. The products of the initial reaction were characterized, and their progress through sub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0f8bed9846f62f3b97763b09c4f88fb9
https://doi.org/10.1021/ja065497c
https://doi.org/10.1021/ja065497c
Publikováno v:
Geoderma. 130:124-140
Chemically and physically fractionated samples extracted from the surface horizon of a soil developed under a mix of coniferous and deciduous vegetation in southwestern Colorado were studied. 13 C NMR data on this soil ' s organic matter and its HF(a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4f7ee609c3d458c72c7c3f89aa3273f6
https://doi.org/10.1016/j.geoderma.2005.01.015
https://doi.org/10.1016/j.geoderma.2005.01.015
Autor:
Mark R. Seger, Gary E. Maciel
Publikováno v:
Environmental Science & Technology. 40:797-802
Phosphorus-31 nuclear magnetic resonance (31P NMR) was used to explore the decomposition of chlorpyrifos (an organothiophosphate pesticide) sorbed at high concentration (typically 2-10 wt %) on partially hydrated montmorillonite clays in four differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d97d2a0d146486213833fb7a47b734bd
https://doi.org/10.1021/es051704h
https://doi.org/10.1021/es051704h
Publikováno v:
Energy & Fuels. 19:2247-2253
In situ high-temperature EPR has been used to study the 350 and 500 °C pyrolysis (under a He atmosphere) of tobacco, as well as the EPR-signaled changes in the resulting char under exposure to O 2 and H 2 O after quenching to room temperature. Expos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afa5f5162924d0b0abdf36338896589e
https://doi.org/10.1021/ef058012z
https://doi.org/10.1021/ef058012z