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Elektronická kniha

Autor: T.J. Betts

40 Days in Psalms is part of a series of devotionals written for any Christian desiring to deepen his or her understanding of Scripture. The Holy Spirit uses God's Word to grow believers in their faith and increase their passion for Jesus. As each v

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Plots of relative retention against solute boiling point indicate extra solute interactions with a liquid crystal polysiloxane stationary phase

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 743:341-346

Using a commercial liquid crystal polysiloxane phase MPMS capillary, relative retention times to n-tetradecane were plotted against literature boiling points (°C, 760 nm) for 26 solutes found in volatile oils. Values for five low polarity solutes we

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13551fcef7c473f4b84bf158cbc005ec
https://doi.org/10.1016/0021-9673(96)00330-5

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Plots of relative retention against solute boiling points may indicate host-guest interactions with modified cyclodextrin gas chromatographic phases

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 732:408-413

Relative retention times with respect to n-undecane, obtained on six different modified α-, β- and γ-cyclodextrin capillary gas chromatographic stationary phases, were plotted against the literature boiling points for nine low-polarity solutes whi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3badb2362a499832b7eb6fe78badc4da
https://doi.org/10.1016/0021-9673(95)01383-0

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Indications of the chemical structure of oxygen-containing constituents of volatile oils by capillary gas chromatography using one or two modified β- and α-cyclodextrin phases

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 724:403-410

Three modified β-cyclodextrin (CD) and two α-CD phases were used at 125 and 150°C to gas chromatograph 22 diverse oxygen-containing substances from volatile oils. Percentage changes with temperature in retention times relative to n-undecane were d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::531a7a2d2269544a42d5f96366485631
https://doi.org/10.1016/0021-9673(95)00970-1

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Relative polarities of nine modified cyclodextrin commercial stationary phases in gas chromatographic capillaries

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 719:375-382

“Polarities” of commercial modified cyclodextrin (CD) gas chromatographic phases were rated at 100 °C by the averages of retention indices for eight McReynolds' probe solutes, by the sequence and proportion of three, and by values for two of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29fa9073103f843a2333014fc39346a0
https://doi.org/10.1016/0021-9673(95)00719-9

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Use of a trio of modified cyclodextrin gas chromatographic phases to provide structural information on some constituents of volatile oils

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 707:390-395

A trio of modified cyclodextrin (CD) gas chromatographic phases has been selected to provide structural information on some of the diverse constituents of volatile oils. Trifluoracetyl-CDs were found to be unstable phases, which probably hydrolyse du

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f152b49efe7bdc6ed4ef2c19ea85f156
https://doi.org/10.1016/0021-9673(95)00345-n

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Comparison of two esterified γ-cyclodextrins with some other chirally selective gas chromatographic phases using volatile oil constituents

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 678:370-374

Twenty-six different volatile oil constituents were used as solutes to check some chirally selective gas chromatographic phases for similar behaviour. Some diverse monoterpenoids and aromatics gave almost the same relative retention times on three di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f99c2d04fb0bf4c3546d8e43f3cbb5e
https://doi.org/10.1016/0021-9673(94)80486-9

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Use of esterified and unesterified dipentylated γ-, β- and α-cyclodextrins as gas chromatographic stationary phases to indicate the structure of monoterpenoid constituents of volatile oils

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 672:254-260

“Chiraldex-G-DA”, unesterified dipentylated γ-cyclodextrin, yields a twenty-nine solute sequence distinctively different to other cyclodextrin modifications and to conventional stationary phases, particularly retaining bicyclic molecules. Percen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::425f5d476c727c9cecefff071c91bc65
https://doi.org/10.1016/0021-9673(94)80615-2

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Evaluation of a 'Chirasil-Val' capillary for the gas chromatography of volatile oil constituents, including sesquiterpenes in patchouli oil

Autor: T.J. Betts

Publikováno v: Journal of Chromatography A. 664:295-300

The methyl-polysiloxane phase “Chirasil-Val” containing about 6% branched aliphatic side chains with l -valine in diamide linkage, has had its response assessed to various volatile oil constituents. Changes in relative retention times with temper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::54e1f07bbcba70dafb6da156a23139f9
https://doi.org/10.1016/0021-9673(94)87020-9

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