𝔖 Bobbio Scriptorium
✦   LIBER   ✦

South African fish products. Part XXI. Recovery of vitaminA in the unsaponifiable matter of fish liver oils

✍ Scribed by Black, M. M. ;Lamchen, M. ;Rapson, W. S. ;Schwartz, H. M. ;Van Rensburg, N. J.

Publisher
Wiley (John Wiley & Sons)
Year
1946
Weight
411 KB
Volume
65
Category
Article
ISSN
0368-4075

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The percentage recovery of Vitamin A in the unsaponiflable matters from commercial South African hake, soupfin shark, dogfish, kabeljou and geelbek liver oils has been determined for a large number of samples and characteristic values for each type of oil have been established. Hake liver oils were exceptional in giving recoveries not significantly different from 100%, while recoveries from the other types of oils averaged from 93‐95%, and wore unaltered when the oils wore diluted with vegetable oils such as an employed in margarineo compositions. No explanation of the different recoveries if given, but possible causes are discussed.

πŸ“œ SIMILAR VOLUMES

South african fish products. Part XXV-Th
South african fish products. Part XXV-The recovery of unsaponifiable matter from marine oils by the society of public analysts' method
✍ Karnovsky, M. L. ;Rapson, W. S. ;Black, M. πŸ“‚ Article πŸ“… 1947 πŸ› Wiley (John Wiley & Sons) βš– 454 KB

S-0. of emactions Liver oil of Cmrrorry:n:nii furrw A. 1st extraction B. and extraction C. 3rd-61h extractions combined X. 11t cxtrnctlon Y 2nd extrnction Z: 31d-6th cxtrnctiona combined (I) More than the specified 2 6. of oil were employed in most cases, but the quantities of all reagents were adju

South African fish products. Part XXIII.
South African fish products. Part XXIII. Variations in the oil and vitaminA contents of the liver of the cape hake (Merluccius capensis, cast.)
✍ Roux, E. R. ;Molteno, C. J. πŸ“‚ Article πŸ“… 1946 πŸ› Wiley (John Wiley & Sons) βš– 426 KB

## Fnctory dntn collurtccl st C ~I E Town nnd Port Eliznhtll nro risecl to ilonionetrnto riiriiitions in tho oil nnd vitnniin -4 contcnts of tho liver of tlir C n p hnkc. Zn nddition to acnsoiinl c1inngr.s mlntctl to tho sosiinl rvcle, tIicm nro ninrkcd hctnntions rmln renr to venr, probtibly conn

South African fish products. Part II. Th
South African fish products. Part II. The Quantitative extraction of laboratory samples of oils from fish tissues
✍ Rapson, W. S. ;Schwartz, H. M. ;Van Rensburg, N. J. πŸ“‚ Article πŸ“… 1943 πŸ› Wiley (John Wiley & Sons) βš– 409 KB

grnph IIIb. If, with this sample weight, difficulty is experienced in redissolving the solid in dilute nitric ncid, the dnrk brown residue of mnngnnesc dioxide lllny be tnken up readily by the nddition of 2 or 3 drops of sulphur dioxide solution. Any excess must then be cxpelled by boiling gently, p

South African fish products. Part XXII.
South African fish products. Part XXII. Periodic acid as a reagent in the analysis of the unsaponifiable fractions of natural fats
✍ Karnovsky, M. L. ;Rapson, W. S. πŸ“‚ Article πŸ“… 1946 πŸ› Wiley (John Wiley & Sons) βš– 408 KB

## Abstract A study of the distribution, nature and metabolism of glyceryl ethers in natural fats is in progress, and as a preliminary to the publication of results, a method which has been used for the quantitative estimation of α‐glyceryl others in the unsaponifiable fractions of natural fats is

South african fish products. Part XXVI.
South african fish products. Part XXVI. Application of the fitelson method of β€œsqualene” determination to some marine oils
✍ Karnovsky, M. L. ;Rapson, W. S. πŸ“‚ Article πŸ“… 1947 πŸ› Wiley (John Wiley & Sons) βš– 266 KB

## Abstract The technique described by Fitelson^1^ for the determination of olive oil in edible oil mixtures has been applied to several marine oils with unsaponifiable fractions of different types. The results indicate that the method should be of particular value in the structural analysis and ch