The combined physicochemical methods such as ultraviolet, infrared, nuclear magnetic resonance (1) and mass spectroscopy (2) made possible to determine the structures of small quantities of new gibberellins. Optical rotatory dispersion (ORD) and circular dichroism (CD) have been used for the elucida
Petroporphyrins: Structural elucidation and the application of HPLC fingerprinting to geochemical problems
โ Scribed by Geoffrey Eglinton; Saleh K. Hajibrahim; James R. Maxwell; J. Martin; E. Quirke
- Book ID
- 116087528
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 709 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0079-1946
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
In this paper the application of the theorems of structural variation to finite element problems is presented and a simplified procedure for constant strain triangular elements is developed. Applications for these techniques are discussed.
โฌI and =C NMR spectral data for 21 N-rnethyltetrahydroquinoxalines annelated with furan, p p l e , imidazole or thiazole rings are reported. Unambiguous assignments of the ring junction =C resonances were made on the basis of selective decoupling experiments and with the aid of one-bond and long-ran