摘要:

AbstractA further review is presented which summarises and comments on recent progress concerning decomposition and control of the self‐radiolysis of compounds labelled with radioisotopes. Organic compounds labelled with the radioisotopes carbon‐14, hydrogen‐3 (tritium), sulphur‐35, and phosphorus‐32 are dealt with principally, together with some problems concerning their analysis and the effect on their use of the presence of impurities. Tables for the self‐radiolysis rates of a number of groups of compounds a

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030502

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

摘要:

AbstractProgressive iodination of HSA affects its electrophoretic behaviour : however, no apparent formation of degradation products has been detected up to a substitution degree of about 24 iodine atoms per molecule of HSA.The HSA, progressively iodinated, shows an increased mobility on agar gel, and behaves as a single and homogeneous compound by moving boundary electrophoresis. No apparent correlation exists between the electrophoretic behaviour and the biological properties of the iodoalbumins which have been previously checked in humans. On this basis, the validity of electrophoresis as a control tool for the labelled albumin may be seriously questioned.

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030503

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

摘要:

AbstractStudies were performed on the radioactive yield of preparations of chromic phosphate and chromic hydroxide (as a particulate precipitate and as a true colloid) labelled with51Cr and32PUsing an EDTA solution, and under proposed standard conditions, the degree of polymerization (olation and oxolation) of these compounds was investigated.

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030504

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

摘要:

AbstractThe H/D exchange in 2,3‐dimethylbenzothiazolium iodide was studied. The deuteration took place exclusively at the methyl group in position 2, and the non‐catalyzed reaction followed a first order kinet

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030505

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

摘要:

AbstractHydrocarbons can easily be labelled by recoil tritium atoms. Near the end of the recoil track, after the triton has been neutralised and whilst it still retains some excess translational energy, a tritium atom can replace hydrogen atoms in C‐H bonds with high collision efficiency. Results of studies on this reaction in hydrocarbons (ethylene, ethane, propylene, butane, n‐pentane and trans‐butene‐2) are analysed using the Estrup‐ Wolfgang method. It is found that the reactivity integral (I) for the labelling reaction increases with the size of the molecule labelled and that it is usually larger for an alkene than for the corresponding alkane. Furthermore, it is shown that the labelling reaction commences at relatively higher tritium atom energies as the size of the molecule is increased. The implications of these results for the formation of tracer amounts of tritium labelled hydrocarbons are

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030506

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030507

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030508

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030509

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

摘要:

AbstractIn the course of an investigation dealing with the utilization of D‐mannitol and inorganic phosphate byAbsidia glaucait was found necessary to confirm the existence and establish the identity of the 1‐Phosphate ester of this polyol. This paper describes the synthesis of radioactive mannitol‐1‐phosphate labeled with carbon‐14 and phosphorus‐32 by a modification of the procedure of Seegmiller and Horecker (1951) for the synthesis of glucose‐6‐phosphate. In addition we document the paper and gel chromatographic behavior on Sephadex G‐15 of the products and32PPA prepared by the method of Bell (1948) for the synthesis of po

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030510

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY

ISSN:0022-2135    

DOI:10.1002/jlcr.2590030501

出版商:John Wiley&Sons, Ltd.    

年代:1967

数据来源: WILEY