摘要:

Abstractγ ‐Glutamyl‐S‐methylcysteine has been isolated from extracts of lima beans (Phaseolus lunatus L.). Two further peptides, γ ‐glutamyl‐S‐methylcysteine sulfoxide and γ ‐glutamyl‐leucine have been tentatively identified. In addition, free S‐methylcysteine was found in such extracts. The presence of these constituents in varying amounts was observed in all of 6 other varieties of beans that were investigated. During germination S‐methylcysteine and all peptides occurring in lima beans are metabolized to unknown products. An oxidation‐reduction function during the early phases of growth is suggested for the system: γ ‐glutamyl‐S‐methylcysteine/ γ ‐g

ISSN:0018-019X    

DOI:10.1002/hlca.660410102

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractAusHolarrhena africana A. DC. (H. floribunda G. Don) konnten zwei unbekannte Esteralkaloide, Holafrin und Holarrhetin, isoliert und deren Konstitution aufgeklärt werden. Holafrin ist der Brenzterebinsäureester des 12β‐Hydroxyconessimins und Holarrhetin der Brenzterebinsäureester des 12β‐Hydroxyconessins (Hola

ISSN:0018-019X    

DOI:10.1002/hlca.660410103

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractSyntheses and properties of several N2‐substituted hydrazides are describe

ISSN:0018-019X    

DOI:10.1002/hlca.660410104

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractAus Desoxy‐calebassin konnte ein Desoxy‐calebassin‐N(a)‐monometho‐tripikrat der Formel C41H53N4· 3(C6H2O7N3) in schön kristallisierter und einheitlicher Form hergestellt werden, wodurch erneut bewiesen wird, dass dem Calebassin eine Formel mit 40 C‐Atomen (und nicht der Hälfte davon) zukommt. Diese Schlussfolgerung wird weiter bestätigt durch die Darstellung eines Isocalebassinperchlorat‐hydroperchlorats der Zusammensetzung C40H50

ISSN:0018-019X    

DOI:10.1002/hlca.660410105

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractDie optisch aktiven (+)‐ und (−)‐ϵ‐Carotine werden synthetisiert und bes

ISSN:0018-019X    

DOI:10.1002/hlca.660410106

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractThe proton magnetic resonance spectra of ethylenoxyde, trimethylenoxyde, tetramethylenoxyde, pentamethylenoxyde, cyclobutanone, cyclopentanone and cyclohexanone have been measured in pure liquid state and in solution in carbon disulfide and cyclopentane. The spectra of these compounds with one, two and more sets of equivalent nuclei show the expected behaviour with respect to chemical shifts, with the exception of cyclopentanone. In this compound the difference in chemical shifts of the α‐ and β‐protons is abnormally small. The analysis of the spectra will be discussed in a subsequent

ISSN:0018-019X    

DOI:10.1002/hlca.660410107

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractPer condensazione di N2‐acetil‐N2‐metil‐fenilidrazina con cloruri dialchilam minoacilici, dialchilamminoetilici e di acidi aromatici vennero sintetizzati alcuni derivati della fenilidrazina. Vengono esposte considerazioni avute nella preparazione dei derivati, le loro proprietà chimiche e farmacologiche. Vengono resi noti i risultati delle esperienze farmacologiche e batteriologiche sulla attività analgesica, spasmolitica e tuberco

ISSN:0018-019X    

DOI:10.1002/hlca.660410108

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractAneurine‐35S of high specific activity has been prepared following an industrial procedure based on the synthesis ofTodd&Bergel. Starting from 3,0 mmoles of H235S of the specific activity 40,3 mc/mmole, 216 mg of aneurine chloride hydrochloride monohydrate corresponding to a chemical yield of 40,5% based on H235S has been obtained. It was pure as shown by paper chromatography and had a calculated specific activity of 110 μc/mg or 39,1 mc/mmole immediately after synthes

ISSN:0018-019X    

DOI:10.1002/hlca.660410109

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractDie Überführung von 11‐Dehydro‐sarmentogenin in das bekannte 3β,21‐Diacetoxy‐5β‐pregnandion‐(11,20) und den bekannten 3β‐Acetoxy‐11‐keto‐5β‐ätiansäure‐methylester wird beschrieben, ferner die Überführung von 3‐De‐hydro‐sarmentogenin in den bekannten 11α‐Acetoxy‐3‐keto‐5β‐ätiansäure‐methylester. Die letzt

ISSN:0018-019X    

DOI:10.1002/hlca.660410110

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY

摘要:

AbstractIt is shown that the experimentally determined pK‐values and the position of the long wave absorption bands of the tropylium cation and some of its benzologues correlate closely with the theoretical predictions drawn from simple LCAO MO models for these compounds. The observed correlation may be used for predictions concerning still missing members of the serie

ISSN:0018-019X    

DOI:10.1002/hlca.660410111

出版商:WILEY‐VCH Verlag GmbH    

年代:1958

数据来源: WILEY