Infrared Studies

Gore, R. C.; Petersen, Elizabeth M.

doi:10.1111/j.1749-6632.1949.tb27319.x

Cited by 16 publications

(1 citation statement)

References 2 publications

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“…Most of the other papers of biological flavor might well be relegated to the other sections of this report. For the benefit of rapid scanners, however, these articles include studies on synthetic polypeptides (12), nucleic acids, nucleotides, and nucleosides (30), cancerous tissue (31), proteins (55), deuterium-labeled steroids ( 63), aqueous solutions of organic acids and salts (92), antibiotics derived from Bacillus polymyxa (93), native spruce lignin (122), the amide linkage in a native globular protein (141), and natural proteins (albumin) and related substances (142). POLYMERS Hampton (101) has described an infrared analysis for cis-trans forms in low temperature polymers; similar studies w'ere reported by Hart (106) and Treumann (253).…”

Section: Biologicalmentioning

confidence: 99%

Infrared Spectroscopy

Gore¹

1950

Anal. Chem.

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N T H E first annual review of analytical chemistry (18) it was I reported that some 1000 papers dealing with infrared spectroscopy had appeared since 1943. During 1948 more than 300 papers with bearing on the field were published. It appears likely that this upward trend in popularity will remain with infrared spectroscopy as more and more chemists discover its utility.If it is possible to observe developmental tendencies in the field over the passage of one year the following could be considered as important: The increasing recognition by many chemists of the infrared spectrum of a compound as an important physical property is shown by the fact that in one issue of the Journal of the American Chemical Society 33 spectra were reproduced. Papers on instrument design are decreasing, while those dealing with accessories and techniques involving novel application of the field are increasing. Empirical qualitative studies are being published from many new workers in the field on many different classes of compounds. Quantitative analvtical papers, representing only about 7% of the total published, are not stressing general principles as often as reporting specific analvses. Fundamental vibrational analyses lvith attendant calculation of thermodynamic functions are on the increase, even though moqt of the simpler molecules have been treated.A more detailed review of the published work during the year follows but no attempt is made to cite exhaustively all publications. Lecomte (155) and Sutherland (240) have also published reviews. BOOKSEarly in the year "Practical Spectroscopv" by Harrison, Lord, and Loofbourow (106) appeared with a useful treatment of infrared spectroscopy, especially from the experimental standpoint. Bhagavantam and Venkataravudu (2-9) published a book on the "Theory of Groups and Its .4pplication to Phvsical Problems " The monograph on "The Chemistry of Penicillin" (43) included an extensive chapter on the infrared work clone on that problem both here and in England. In France Lecomte published two volumes (152, 166), the first on biological applications, and the second on infrared spectrometry and its phvsicochemical applications. "Infrared Determination of Organic Structures" bv Randall, Fowler, Fuson, and Dangl (208) treats the subject from the standpoint of a practicing spectroscopist and offers many suggestions for beginners. This work reproduces 355 spectra mainly obtained while the authors x-ere engaged with the penicillin problem. INSTRUM ENTATIONModel 21 appears to be an exceptionally versatile instrument with such features as variable scanning time, automatic suppression, and relatively simple electronics. The Beckman instrument employs the unique system in which a recorded trace of the spec-t8rum of the source is played back while the sample spectrum is being taken. A nexv 13-cycle alternating current amplifier, developed by Perkin-Elmer for use with modulated beam spectrometers, has advantages in stability, linearity, and freedom from beat and pickup over the breaker-type amplifier. A ...

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Section: Biologicalmentioning

confidence: 99%

Infrared Spectroscopy

Gore¹

1950

Anal. Chem.

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Das Vorkommen von D‐Aminosäuren in Milchprodukten,

Schormüller

Weder

1962

Nahrung

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In friiheren Arbeiten hatten wir eine aus Penicillium roqueforti Stamm S , , gewonnene D-Aminosaureoxydase gekennzeichnet [I] und spater uber eine in Mikroorganismen von Sauermilchkase gefundene Alanin-Racemase berichtet [z] . Beide Untersuchungsreihen fuhrten zu der naheliegenden Frage, ob und in welchem Aus-ma13 ,,unnaturliche", besser nach dem Vorschlag von Fox [3] als ,,atypische" bezeichnete D-Aminosauren sich in Milchprodukten finden, die mikrobiell-enzymatische Umwandlungen erfahren hatten. Orientierende Vorversuche [4] in dieser Richtung lieferten positive Ergebnisse. Da D-Isomere der naturlichen L-Aminosauren mit wenigen Ausnahmen vom Menschen nicht ausgenutzt werden konnen [5] und die Unbedenklichkeit einer Zufuhr grol3erer Mengen solcher Sauren noch nicht erwiesen ist [6], haben wir in den anschlieBend beschriebenen Untersuchungen Sauermilchkase, Camembert und eine Reihe weiterer Milcherzeugnisse (Kefir, Kumys und Bioghurt), daneben aul3erdem zwei Bakterien-Reinkulturen, die d s sogenannte Rotbakterien in der Sauermilchkaserei Verwendung finden, auf ihren Gehalt an D-Aminosauren gepruft. Seit der ersten Entdeckung einer D-Aminosaure in Naturprodukten, des D-Tyrosins in Keimlingen von Zuckerruben [7], sind viele andere solche atypische Aminosiiuren in zahlreichen Organismen oder Naturstoffen gefunden worden, die allerdings nur vereinzelt fur lebensmittelchemische Fragestellungen Bedeutung besitzen. a) D-Alaszin-findet sich als Fumaryl-DL-danin in Penicillizlm resticdosum [S], in Milchsaurebaktenen [g], in Streptococclrs faecalis [IO] und in anderen Mikroorganismen [II]. Auch im Blut einer Insektenart (Oncopeltus fusciatus, ,,milkweed bug") wurde D-Alanin aufgefunden [12]. Zuweilen ist die Aminosaure in den sog. ,,teichoic acids" gebunden, die als Ribitylphosphat-polymere das Alanin esterartig verkniipft enthalten [13]. Neuere Untersuchungen von IKAWA und SNELL [14]ergaben, daI3 D-Alanyl-D-danin ein Hauptstoffwechselprodukt des D-Alaninstoffwechsels ist.

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Bacitracin I

Gross¹

1955

Journal of the American Pharmaceutical Association (Scientific

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Infrared Studies

Cited by 16 publications

References 2 publications

Infrared Spectroscopy

Infrared Spectroscopy

Das Vorkommen von D‐Aminosäuren in Milchprodukten,

Bacitracin I

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