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  • 1
    ISSN: 1573-5028
    Keywords: patatin ; potato ; transposon ; gene inactivation ; β-glucuronidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The promoter of the PGT3 patatin gene belonging to the class II subfamily is highly homologous to other class II patatin genes except for a 736 bp insertion in front of the putative transcription start site. The insertion is characterized by structural features resembling a transposable element such as an 11 bp inverted repeat at the termini and an 8 bp duplication flanking the insertion site. Despite the high homology to active patatin genes, fusion of its promoter to the β-glucuronidase reporter gene does not lead to detectable β-glucuronidase (GUS) activity in transgenic potato or tobacco plants, suggesting that the inactivation of this gene might be caused by the insertion of the transposon like element.
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  • 2
    ISSN: 1573-5028
    Keywords: patatin ; promoter ; β-glucuronidase ; potato
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The class-specific expression of patatin genes was investigated by analysing four new patatin genes. A class I patatin gene from cv. Berolina as well as a class I and two class II patatin genes from the monohaploid cultivar AM 80/5793 were isolated and partially sequenced. Sequence comparison indicates rearrangements as the major source for the generation of diversity between the different members of the classes. The expression of single genes was studied in potato plants transformed with chimaeric genes where the putative patatin promoters were fused to the GUS reporter gene. A detailed histochemical analysis reveals that both class I genes are expressed as the previously described class I patatin gene B33 from cv. Berolina [1], i.e. in the starch-containing cells of potato tubers and in sucrose-induced leaves. The class II gene pgT12 shows the same pattern as the previously described class II gene pgT2 [2], i.e. expression in root tips and in the vascular tissue of tubers, whereas no activity was detectable for pgT4. Thus the expression pattern of both classes of genes seems to be stable at least within or even between different cultivars.
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  • 3
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fragmentation Reactions of Carbonyl Compounds with Electronegative β-Substituents, XXXII: Reaction of 2,2-Dialkyl-1-cyclohexyl-3-tosyloxy-1-propanone with NucleophilesTosylates 6 and 12 are synthesized starting from ketones 4 and 10,6 and 12 react with CH3Li to yield the oxetanes 17 and 20. LiBH4 reduction of 6 and 12 leads to the oxetanes 16 and 19, as well as to the tosyloxy alcohols 21 and 22. The neopentyl substitution products 7 and 13 are obtained from 6 and 12 with KCN in DMSO, whereas from 6 the cyano oxetane 18 was isolated too. With potassium tert-butoxide 6 reacts to give the enol ether 23, whereas 12 leads to the cyclo-butanone 25. The triflate 14 react with NaOCH3 to give the substitution product 15.
    Notes: Ausgehend von den Ketonen 4 und 10 werden die Tosylate 6 und 12 dargestellt, die mit CH3Li zu den Oxetanen 17 bzw. 20 reagieren. LiBH4-Reduktion von 6 bzw. 12 führt zu den Oxetanen 16 bzw. 19. daneben werden die Tosyloxy-alkohole 21 bzw. 22 isoliert. setzt man 6 bzw. 12 mit KCN in DMSO um, so werden die Neopentylsubstitutionsprodukte 7 bzw. 13, daneben aus 6 auch das Cyan-oxetan 18 erhalten. Mit Kalium-tert-butylalkoholat erhält man aus 6 den Enol-äther 23, dagegen aus 12 das Cyclobutanon 25. Das Triflat 14 reagiert mit NaOCH3 unter Substitution zu 15.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 538 (1986), S. 177-190 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation of the Reaction of Sulfur with Sodium Nitrite in DMF, DMSO, and HMPAThe mechanism of the title reaction has been elucidated by VIS/UV, IR, 15N NMR, and ESR spectrometric measurements, gas analysis, and chromatography. The course of the complex reaction and the great number of products  -  nitrous oxide, nitric oxide, sodium thiosulfate, sulfate, polysulfides, polythionates, nitrate  -  can be explained with the assumption that at first perthionitrates NaSxNO2 are formed, which are decomposed either to give dinitrogen monoxide and thiosulfate, or, react with nitrite to yield nitrate and perthionitrite NaS2NO which dissociates reversibly into sodium trisulfide(-I) and nitrogen monoxide. (The details of the two main series of competitive and consecutive reaction steps can be seen from the tabular summary at the end of the text). The characteristic colour change during the reaction from blue-Green to orange-red is due to the formation of the two coloured species: S3- (blue, λmax = 620 nm, g = 2.029) and ONSS- (red, λmax = 448 nm, δ(15N) = 334 ppm, ref. K15NO3).
    Notes: Durch VIS/UV-, IR-, 15N-NMR- und ESR-spektrometrische Messungen, sowie chromatographische und Gas-Analysen ist der Mechanismus der Titelreaktion aufgeklärt worden. Der Verlauf der komplexen Umsetzung und die groβe Anzahl von Produkten  -  Distickstoffoxid, Stickstoffmonoxid, Natriumthiosulfat, Sulfat, Polysulfide, Polythionate, Nitrat  -  können mit der Annahme erklärt werden, daß zunächst Natriumperthionitrate NaSxNO2 entstehen, die sich in Distickstoffoxid und Thiosulfat zersetzen, oder auch mit Nitrit zu Nitrat und Perthionitrit, NaSSNO, reagieren, das reversibel in Stickoxid und Natriumtrisulfid(1 - ) dissoziiert. (Bezüglich der Einzelheiten der konkurrierenden und aufeinander folgenden Reaktionsschritte vgl. Tab. 2.) Der charakteristische Farbwechsel während der Titelreaktion von blau-grün über braun nach orangerot ist auf die Entstehung zweier Farbträger zurückzuführen: S3- (blau, λmax = 620 nm, g = 2,029) und ONSS- (rot, λmax = 448 nm, δ(15N) = 334 ppm, bez. auf K15NO3).
    Additional Material: 8 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 497 (1983), S. 65-69 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Structural Investigation of K3NO3Synthesis and crystal growth of K3NO3 is described. At room temperature K3NO3 is cubic (a = 521.4 pm, Pm3m) and crystallizes corresponding to the formula (NO2)OK3 in the perovskite-type of structure (diffractometerdata, R = 5.5%).
    Notes: Es wird die Darstellung und Einkristallzüchtung von K3NO3 beschrieben. Bei Zimmertemperatur ist K3NO3 kubisch (a = 521,4 pm, Pm3m) und besitzt gemäß (NO2)OK3 Perowskitstruktur (Diffraktometerdaten, R = 5,5%).
    Additional Material: 3 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 502 (1983), S. 153-157 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On Low-temperature K3NO3Low-temperature Guinier photographs (+20 ← -140°C) indicate a reversible phase-transition at -42°C. From X-ray powder data a structural model based on ordered NO2- groups has been derived (I4cm, a = 726.9(1), c = 1046.3(2) pm).
    Notes: Tieftemperatur-Guinieraufnahmen (+20 ← -140°C) von K3NO3 zeigen eine reversible Phasentransformation bei -42°C an. Aus den Röntgenpulverdaten wird ein Strukturvorschlag abgeleitet (I4cm, a = 726,9(1), c = 1046,3(2) pm), der geordnete NO2--Anionen aufweist.
    Additional Material: 2 Ill.
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  • 7
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    Unknown
    In:  Other Sources
    Publication Date: 2019-06-27
    Description: Love wave propagation in layers with irregular boundaries, investigating scattered field to determine reflection from triangular notch
    Keywords: GEOPHYSICS
    Type: ; RNIER-POST (
    Format: text
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  • 8
    Publication Date: 2019-06-27
    Description: Propagation of Love waves in layers with irregular boundaries studied by earth model in which half space is elastic
    Keywords: GEOPHYSICS
    Type: NASA-CR-94362 , S-68-1
    Format: application/pdf
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