ISSN:0165-0513    

DOI:10.1002/recl.19530720702

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe present paper describes the formation of the di‐ether of 2,3,3‐trichloropropanol‐1 (2,3,3,2′,3′,3′‐hexachloro‐di‐n‐propyl ether) by the condensation of paraformaldehyde with 1,2‐dichloroethene and of the same ether together with 2,3,3‐trichloropropanol‐1 when trioxane is used as the source of formaldehyde.The same ether is also obtained by condensingsymm.‐dichlorodimethyl ether with 1,2‐dichloroethene. The condensation of chloromethyl ether with 1,2‐dichloroethene gives the methyl ether of 2,3,3‐trichloropropanol‐1.The mechan

ISSN:0165-0513    

DOI:10.1002/recl.19530720703

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractBoiling α‐glycerophosphatidic acids with alcoholic sodium hydroxide gives only glycerol‐α‐phosphoric acid, whereas from β‐glycerophosphatidic acids only glycerol‐β‐phosphatidic acid is formed. It is pointed out that esters of these phosphatidic acids behave qu

ISSN:0165-0513    

DOI:10.1002/recl.19530720704

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe reaction of elaidic acid with atomic hydrogen at low temperatures (50° C) was investigated. Besides polymerization, a considerable hydrogenation took place; in contrast with catalytic hydrogenation processes no cis‐trans isomerism could be detected, and displacement of the double bond occurred to a small extent on

ISSN:0165-0513    

DOI:10.1002/recl.19530720705

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractDas 3,5‐Dinitropyridin wurde auf synthetischem Wege dargestelt, seine Eigenschaften wurden untersucht und einige neue, bisher unbekannte Pyridinderivate als Zwischenprodukte erhalte

ISSN:0165-0513    

DOI:10.1002/recl.19530720706

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe existing methods for the micro‐determination of mercury have not given reliable results for the determination of this metal in spray residues on the leaves of apple and pear.As most methods are complicated, simple methods for the destruction of the plant materials and for the separation of the mercury have now been develope

ISSN:0165-0513    

DOI:10.1002/recl.19530720707

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractConstruction of a v‐t‐x space model; its v‐t and v‐x projections, and sections at constant volume. Critical comparison with such diagrams from the lit

ISSN:0165-0513    

DOI:10.1002/recl.19530720708

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe influence of certain antibiotics and other biochemically active substances on CO2fixation in the dark and in the light was studied by C14tracer techniques. Dinitrophenol stopped both processes, whereas antifolics did not show any influence on the rate or the pattern in CO2fixation byScenedesmus obliquusunder the conditions of our experiments. Chloromycetin did not alter the velocity of CO2uptake in the dark or in the light.Penicillin did not alter the total uptake of CO2but apparently altered the metabolic pattern in dark fixation, e.g. the decrease in the amount of radioactive malic acid formed. In control experiments it was confirmed that malic acid becomes strongly labeled during dark CO2fixation. Pyrithiamine had no significant influence on total dark fixation, although it lowered the activity of the malic acid spot.Aureomycin hydrochloride had an inhibiting effect on dark fixation in concentrations of about 10−3M.It accelerated photosynthesis about two times in 3 × 10−5Mconcentration and six times in 1.5 × 10−4Mand higher concentrations. Terramycin hydrochloride showed a similar behaviour. Probably part of this effect is due to shifts in pH and another part to increased buffering capacity. While it was possible to eliminate the direct pH effect, it is difficult to estimate the influence of the buffer capacity. Analysis of the chromatograms of the products formed revealed that the activity in most of the products found in short period photosynthesis was increased proportionally. However, addition of aureomycin produced an abnormally high increase in sucrose. Phosphate increased the amount of alanine produced. A short discussion of these phenomena has bee

ISSN:0165-0513    

DOI:10.1002/recl.19530720709

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractLa réaction conduit à des thiolsulfonates (“disulfoxydes”) de la formule (C6H5)2CHSO2SR. On peut admettre une fixation des mercaptannes sur la double liaison d'un “sulfène” formé interm

ISSN:0165-0513    

DOI:10.1002/recl.19530720710

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY

摘要:

AbstractThe existence of POCl3‐complexes of complex‐forming chlorides (e.g. SnCl4, TiCl4, SbCl5), combined with the precipitation method in POCl3for the preparation of PCl5‐compounds1). strongly creates the impression that there might be an analogy between the H2O and the POCl3systems. It is known that hydrates of complex‐forming chlorides are decomposed by e.g. CsCl2CsCl + SnCl4· nH2O → Cs2SnCl6+ n H2O2 PCl5+ SnCl4· n POCl3→ (PCl4)2SnCl6+ n POCl3In order to get some information about the possibility of this process, the system POCl3‐PCl5‐complex‐forming chloride is investigated by condu

ISSN:0165-0513    

DOI:10.1002/recl.19530720711

出版商:WILEY‐VCH Verlag    

年代:1953

数据来源: WILEY