Zobrazeno 1 - 10
of 89
pro vyhledávání: '"J. Fenk"'
Publikováno v:
Journal of Chemical Education. 87:838-841
An undergraduate LC−MS experiment is described for the identification and quantitative determination of acetaminophen, acetylsalicylic acid, and caffeine in commercial analgesic tablets. This inquiry-based experimental procedure requires minimal sa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fadf5da2c4f4e70ad0ac6dc37fca3ba
https://doi.org/10.1021/ed100280y
https://doi.org/10.1021/ed100280y
Publikováno v:
Journal of Science Teacher Education. 20:437-457
The purpose of this study was to explore the relationship between teachers’ (N = 69) participation in constructivist chemistry professional development (PD) and enhancement of content (CK) and pedagogical content knowledge (PCK) (representational t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::740ddd926ce1d4d0bf6b513ac94fe194
https://doi.org/10.1007/s10972-009-9140-0
https://doi.org/10.1007/s10972-009-9140-0
Publikováno v:
IEEE Journal of Solid-State Circuits. 36:1407-1419
A fully integrated, dual intermediate frequency (IF) receiver and an IF transmitter, each with on-chip IF synthesizer, for use in third-generation wide-band code division multiple access (W-CDMA) mobiles has been implemented in a standard, high-frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::206ed202a6a0eb785d5b27e51c2784c7
https://doi.org/10.1109/4.944670
https://doi.org/10.1109/4.944670
Publikováno v:
The American Biology Teacher. 62:583-587
s should provide enough information to initiate discussion of the application. It is important to note, however, that great care must be exercised when using other Internet resources which may not be directly associated with the primary literature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb283fed1f4fff8e031be99d0cf4f979
https://doi.org/10.2307/4450982
https://doi.org/10.2307/4450982
Autor:
Christopher J. Fenk
Publikováno v:
Tetrahedron Letters. 40:7955-7959
The preparation of novel 3-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octyl)-Δ2-isoxazolines 2 via nitrile oxide cycloaddition chemistry is described. The target compounds were produced in moderate to good yields using only 2.2 equivalents of alkene and wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0fef15a3d8e5d39a925cf021696fa13
https://doi.org/10.1016/s0040-4039(99)01656-1
https://doi.org/10.1016/s0040-4039(99)01656-1
Publikováno v:
e & i Elektrotechnik und Informationstechnik. 115:353-359
Die in Handfunkgeraten der GSM- und DECT-Mobilfunksysteme benutzten Frequenzerzeugerkonzepte beruhen im wesentlichen auf dem Einsatz dreier von dem Sende- und Empfangssynthesizer angesteuerten abstimmbaren Ozsillatoren. Ziel der gegenwartigen Arbeite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5abbccdafd26f00ecaa618b52e8718ff
https://doi.org/10.1007/bf03159604
https://doi.org/10.1007/bf03159604
Autor:
J. Fenk
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 45:2531-2539
TDMA based digital systems like GSM for cellular and DECT for cordless application have created an increasing market within Europe and gained widespread acceptance also outside Europe. This paper gives an overview of both systems, The system requirem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::876f568620ea07d284823621316d3e55
https://doi.org/10.1109/22.643870
https://doi.org/10.1109/22.643870
Publikováno v:
IEEE Journal of Solid-State Circuits. 31:1517-1525
A second-order active bandpass filter using integrated inductors was implemented in Si bipolar technology. The filter uses special techniques to make the quality factor and the center frequency tunable. For a nominal center frequency of 1.8 GHz and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74a4343a7279afc5062cf6bc79d6a07f
https://doi.org/10.1109/4.540064
https://doi.org/10.1109/4.540064
Autor:
Thomas E. Royster, Schwender Charles F, John H. Dodd, Gregory C. Lindabery, Christopher J. Fenk, Stephen M. Stefanick, Richard A. Conley
Publikováno v:
Journal of Heterocyclic Chemistry. 31:351-355
An eight membered cyclic sulfone 1,4-dihydropyridine, RWJ 22726, 1, with remarkable cardiovascular activity was prepared by isomerization of an exocyclic double bond isomer using various reaction conditions. Under acidic and thermal isomerization con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ba17dbbc86cb19b2d78dae3058d13c8
https://doi.org/10.1002/jhet.5570310216
https://doi.org/10.1002/jhet.5570310216
Autor:
Richard A. Conley, Schwender Charles F, Stephen M. Stefanick, Gregory C. Lindabery, John H. Dodd, Christopher J. Fenk, Thomas E. Royster
Publikováno v:
ChemInform. 26
An eight membered cyclic sulfone 1,4-dihydropyridine, RWJ 22726, 1, with remarkable cardiovascular activity was prepared by isomerization of an exocyclic double bond isomer using various reaction conditions. Under acidic and thermal isomerization con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1feb956fc7b03ea75cc65939882bc89e
https://doi.org/10.1002/chin.199512238
https://doi.org/10.1002/chin.199512238