Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
The effect of phenotypic plasticity on agar from Gracilaria salicornia (J.Ag.) Dawson (Gracilariales, Rhodophyta) in Kenya
Oyieke, H. A. (1994). The effect of phenotypic plasticity on agar from Gracilaria salicornia (J.Ag.) Dawson (Gracilariales, Rhodophyta) in Kenya. Bioresour. Technol. 49(3): 267-271. dx.doi.org/10.1016/0960-8524(94)90051-5
In: Bioresource Technology. Elsevier: Barking. ISSN 0960-8524; e-ISSN 1873-2976, meer
|  |
| Trefwoorden |
Gracilaria salicornia (C.Agardh) E.Y.Dawson, 1954 [WoRMS]
Marien/Kust |
| Author keywords |
phenotype, agar yield, quality |
| Abstract |
Hot water agar extracts were made from different phenotypes of Gracilaria salicornia and their chemical and physical properties studied. The highest agar yield (12-16% dry weight) was obtained from the phenotype that grows in bundles in intertidal muddy-rocky surfaces (ecotype B), while the lowest yield (6.5-7.8%) came from the phenotype that grows as cushions on exposed intertidal rocky surfaces (ecotype C). Gelling temperatures were generally higher in the extracts obtained from the intertidal phenotypes (ranging from 36 to 38-degrees-C) and lower in those obtained from the sublittoral phenotype (phenotype D) which ranged between 34 and 35-degrees-C. Conversely the melting temperatures were higher in the extracts obtained from the sublittoral phenotype than those of the intertidals. The highest gel strength of 240 g/cm2 was recorded from the extracts of phenotype C whereas the lowest, 78.7 g/cm2, was recorded from the exposed intertidal pool phenotype (A). Highest 3,6-anhydrogalactose and sulphate contents, 19.4 and 1.6% respectively, were recorded from agar extracts of phenotype C while phenotype B had the lowest sugar content (11.1%) and phenotype D the lowest sulphate content (1.25%). The effect of age on the different parameters measured varied from phenotype to phenotype. The influence of macro- and micro-habitats on the quality and quantity of agar from different phenotypes is discussed. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
