Search results for " suber"
showing 4 items of 34 documents
Immediate early response of the marine sponge Suberites domuncula to heat stress: Reduction of trehalose and glutathione concentrations and glutathio…
1997
The marine sponge Suberites domuncula was used to identify early markers for thermal stress. Cubes from sponges have been kept for 30 min at 31°C (10 °C higher than the ambient temperature). After this treatment the sponge cubes were kept again at 21°C. To demonstrate that the animals reacted to the elevated temperature, the expression of heat shock protein (HSP) was determined. Using an antibody raised against HSP70, it was found by Western blotting that the animals specifically express a 45 kDa polypeptide after heat treatment. It was shown that even after 10 min of heat treatment the steady-state concentration of trehalose drops by 40% from a base level of 13 nmol/mg protein. The activit…
Initiation of an Aquaculture of Sponges for the Sustainable Production of Bioactive Metabolites in Open Systems: Example, Geodia cydonium.
1999
Among Metazoa, sponges (phylum Porifera) are the richest source for different bioactive compounds. The availability of the raw material is, however, restricted. To obtain enough of the bioactive compounds for application in human therapy, sponges have to be cultured in in vitro systems. One technique for the establishment of a long-term cell culture from sponges has recently been elaborated. Here, we present a procedure to cultivate tissue samples from sponges in an open system. The species Geodia cydonium, which produces bioactive compounds, has been selected. Tissue samples of approximately 10 g were attached to the bottoms of cultivation trays. After 2 to 3 days, the tissue samples forme…
Prime osservazioni sulle micorrize di Quercus suber L. in Sicilia
2001
La qualità del sughero: metodologie di valutazione e norme tecniche per il sughero grezzo e per i prodotti derivati.
2007
La possibilità di ritrarre dal sughero prodotti derivati dipende fortemente dalla sua qualità. Il termine «qualità» del sughero non è sostenuto da chiari riferimenti normativi e non esiste, allo stato attuale, una metodologia oggettiva per la sua valutazione univocamente accettata. In questi ultimi anni si sta producendo uno sforzo teso all’oggettivazione di metodologie di valutazione della qualità del sughero attraverso la definizione di norme di classificazione e standardizzazione dei prodotti ritraibili e/o attraverso sperimentazioni concernenti l’applicazione sul sughero grezzo o sui prodotti derivati di particolari tecniche utilizzate in altri campi scientifici e/o su altri materiali. …