摘要:

Differential enthalpic analysis of the thermal degradation of aromatic and heteroaromatic amino acids provides thermograms which are characteristic of specific amino acids (e.g. phenylalanine, tyrosine, tryptophan or histidine). Curve resolution of the resulting thermograms suggests that a minimum of three reactions are involved in the degradation (within the temperature limits of 500–620 [ddot]K) and provides TMvalues for each of these concurrent reactions.

ISSN:0003-2719    

DOI:10.1080/00032716908051323

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

Pyridine-2-aldehyde-l-thionaphthylhydrazone (PATNH) reacts with copper in IN hydrochloric acid to give a complex suitable for the absorptiometric determination of copper in non-ferrous alloys and in salts.

ISSN:0003-2719    

DOI:10.1080/00032716908051324

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A new solid-state cadmium ion selective electrode is evaluated. Interference effects are considered and the electrode is used to detect the endpoint in titrations of cadmium ion in water and in dimethylsulfoxide.

ISSN:0003-2719    

DOI:10.1080/00032716908051325

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A non-destructive method for the neutron activation analysis of chondritic meteorites by multiparameter coincidence spectrometry is described. Results for sodium, cobalt, nickel and iridium are presented, and agree with single coincidence spectrometry measurements. Scandium photopeaks are prominent in the multiparameter spectrum and this element could also be determined. The advantages of multiparameter spectrometry over single coincidence counting are outlined.

ISSN:0003-2719    

DOI:10.1080/00032716908051326

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

When yeast β-fructofuranosidase is chromatographed on DEAE-callulose with a linear gradient, subfractions of the emergent peak can be individually rechromatographed on new columns as essentially separate entities. This behavior is related to the polydispersity in polysaccharide to protein ratio which is encountered in this glycoprotein enzyme.

ISSN:0003-2719    

DOI:10.1080/00032716908051327

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

A spectropolarimetric method of analysis was developed for calcium(II), strontium(II), barium(II) and yttrium(III) utilizing the stereospecific ligand, D-(-)-1,2-propylenediaminetetraacetic acid (D(-)PDTA). The optical rotation of the solution was monitored with a photoelectric polarimeter to determine the end point of the titration. The metal complexes and titrant are optically active and serve as self-indicators. Since D(-)PDTA is stereospecific in its reaction with these metals, maximum utilization of the optical rotation of these complexes is achieved. The observed optical rotation is linear with respect to concentration of the metal complexes; consequently, it is possible to perform straight line extrapolations to the end point. The effects of some parameters were investigated and optimum conditions were established. The range of the average deviations from visual chelometry for the four metals determined was 0.00 to 0.50%.

ISSN:0003-2719    

DOI:10.1080/00032716908051328

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

ISSN:0003-2719    

DOI:10.1080/00032716908051329

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0003-2719    

DOI:10.1080/00032716908051322

出版商:Taylor & Francis Group    

年代:1969

数据来源: Taylor