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The Absorption Spectra of some Indole Derivatives.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ward, Frederick William |
| Copyright Year | 1923 |
| Abstract | IN the course of an investigation on the metabolism of tryptophan and some of its derivatives, it was thought advisable to study the absorption spectra of several of these compounds. Apparatus. The apparatus used for the measurement of these absorption spectra was a quartz ultra-violet spectra photometer made by Adam Hilger, Ltd. It consisted of a quartz ultra-violet spectragraph with an electrode holder, a 1/4 kilowatt transformer, a suitable condenser and a rotating sector photometer. The spectragraph took a plate 10 x 4 inches and also contained a wave length scale mounted inside the spectragraph. By means of this scale the wave length could be photographed on the plates. For electrodes, nickel rods were found to be the best for this kind of work. The emission spectrum of nickel is nearly as rich in lines as that given by iron and continues as far down as 2200 A.U. whereas the spectrum of iron has relatively few lines below 2500 A.U. Copper gives an emission spectrum which goes as far down as 2100 A.U. but the lines are not nearly as plentiful and it does not give nearly as satisfactory results in the measurement of absorption spectra. Method. |
| File Format | PDF HTM / HTML |
| DOI | 10.1042/bj0170891 |
| PubMed reference number | 16743230 |
| Journal | Medline |
| Volume Number | 17 |
| Issue Number | 6 |
| Alternate Webpage(s) | https://www.be-md.ncbi.nlm.nih.gov/pmc/articles/PMC1259594/pdf/biochemj01164-0224.pdf |
| Alternate Webpage(s) | https://doi.org/10.1042/bj0170891 |
| Journal | The Biochemical journal |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
