Microdetermination of l-leucine and dl-valine
โ Scribed by O.C. Saxena
- Publisher
- Elsevier Science
- Year
- 1968
- Tongue
- English
- Weight
- 261 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0026-265X
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๐ SIMILAR VOLUMES
Di-and triblock copolymers of poly(ethylene oxide) (PEO) and poly(DL-valine-co-DL-leucine) were synthesized by ring-opening polymerization of N-carboxyanhydride (NCA)s of DL-valine and DL-leucine initiated by amine-terminated PEOs. The resulting block copolymers were characterized by 1 H NMR; FT-IR,
A comparative study of the infrared and Raman spectra of L-valine nitrate and L-leucine nitrate helps in determining the role of hydrogen bonds in these crystals. Both compounds have carboxylic and protonated amino groups in the cation while the nitrate ion forms the anion. The wavenumbers of severa
## Abstract The Raman spectrum of polyโDLโalanine (PDLA) in the solid state is interpreted in terms of the disordered chain conformation, in analogy with the spectrum of mechanically deformed polyโLโalanine. The polymer is largely disordered with only a small ฮฑโhelical content in the solid state. W
## Abstract Molecular motion in solid poly(Lโalanine), Poly(Lโleucine), poly(Lโvaline), and polyglycine has been investigated through measurement of the portion spinโlattice relaxation time at 30 and 60 MHz between 110 and 350ยฐK. Rapid random reoriention of siedโchain methyl groups provides the dom