摘要:

AbstractThe electronic structures oftrans‐ andcis‐stilbene are calculated using Pariser and Parr's semiempirical method. The resonance integrals are adjusted so as to give the best agreement with the spectroscopic data. In addition, the potential surfaces of various excited states in stilbene during its isomerization process are calculated. Our results differ significently from those of Borrell and Greenwood2)who did not realized the importance of a doubly excited singlet state to the potential surface of the ground state of stilbene. Our improved potential surfaces suggests mechanism of various radiationless leading to photoisomerization and sensitized isomerizat

ISSN:0009-4536    

DOI:10.1002/jccs.197100011

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractThe dissociation constants of 7‐iodo‐8‐quinolinol‐5‐sulfonic acid and the formation constants of it's chelates with La(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), Yb(III) and Lu(III) have been determined potentiometrically in 1:1 v/v dioxane‐water medium at 25±0.1°C and at an ionic strength of 1 with respect to so

ISSN:0009-4536    

DOI:10.1002/jccs.197100012

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractThe structure of 2:1 adduct of 1‐methylindole and dimethyl acetylenedicar‐boxylate was elucidated as dimethylα, α‐bis(1‐methylindol‐3‐yl)‐succinate. Some of its derivative

ISSN:0009-4536    

DOI:10.1002/jccs.197100013

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractThe decarboxylation and dimerization product of 1‐methylindole‐3‐fumaric acid was elucidated as 2, 4‐bis‐(1‐methylindol‐3‐yl)‐2‐methyl‐γ‐butyrolactone‐4‐carboxylic acid. Some of its de

ISSN:0009-4536    

DOI:10.1002/jccs.197100014

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

Abstract6‐(2‐Hydroxyethyl‐1, 2‐14C) amino‐9‐β‐D‐ribofuranosylpurine (I) and 6‐(2‐mercaptoethyl‐35S) amino‐9‐β‐D‐ribofuranosylpurine (II) were synthesized for the investigation of their in vivo distribution in mice. All the reaction conditions were made by non‐radioactive runs and it was found that thiol compound II was easily oxidized to form the disulfide

ISSN:0009-4536    

DOI:10.1002/jccs.197100015

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractChemical examination of the leaves ofAnona glabra L. (Anonaceae) has led to the isolation of a new alkaloid, (−)‐N‐methylactinodaphnine (I) together with reticuline (III) from the alcoholic extract. Characterization of this base (I) by spectral evidence and direct comparison of their infrared spectra (nujol) and tlc were found identical with (+)‐N‐methylactinodaphnine except the optical rotation and mixed melt

ISSN:0009-4536    

DOI:10.1002/jccs.197100016

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractFrom the peptic digest of normal human serum albumin., theN‐terminal peptide comprising 24 amino acid residues was obtained by means of peptide mapping. Combined uses of trypsin, α‐chymotrypsin, thermolysin, carboxypeptidase A and Dansyl‐Edman technique resulted in the elucidation of amino acid sequence of no. 1 to no. 24 as follows:NH2‐Asp‐Ala‐His‐Lys‐Ser‐Glu‐Val‐Ala‐His‐Arg‐Phe‐Lys‐Asp‐Leu‐GIy‐Glu‐Glu‐Asn‐Phe‐Lys‐Ala‐Leu‐Val‐Leu‐COOH These sequence results agree c

ISSN:0009-4536    

DOI:10.1002/jccs.197100017

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractA radiochemical method using14C‐labeled N‐ethylmaleimide (NEM‐14C) as a reagent for sulfhydryl determination is reassessed and described in detail. The method is based on the activity of14C‐labeled S‐succinyl‐L‐cysteine (III‐14C) recovered from the controlled hydrolysis of the NEM‐14C treated sulfhydryl‐containing peptide and the correlation between III‐14C and SH content established with glutathione. It is simple, accurate and highly sensitive and is not affected by disulfide group as indicated by experiments with insulin. Good result is obtained from tests with β‐lactoglobulin. It gives a value of 1.94moleSH permoleprotein, which is close to

ISSN:0009-4536    

DOI:10.1002/jccs.197100018

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY

摘要:

AbstractA two‐step synthesis of dihydrojasmone from 2‐n‐pentyl cyclopentan‐1,3‐dione is

ISSN:0009-4536    

DOI:10.1002/jccs.197100019

出版商:WILEY‐VCH Verlag    

年代:1971

数据来源: WILEY