These findings have shown that, like sperm, oocytes also lose their integrity and viability when coincubated with the polymer or medium containing the polymer.
For this reason, to facilitate suturing and post-operative recovery, almost all organ cultured corneas stored in European Eye Banks are thinned in medium containing the polyglucose polymer, Dextran T500, prior to transplant [ 1, 2].
Amorphous polymers themselves are superior to semicrystalline polymers for the dissolution enhancement of the crystalline API in a medium containing pre-dissolved polymers.
HNep cells were infected with influenza virus (5 PFU/cell) in the presence of iota-carrageenan or CMC as a control polymer and subsequently maintained in medium containing different amounts of polymers (0.5 µg/ml to 400 µg/ml).
Fresh medium containing various concentrations of polymers was added after 48 h, and the cell suspensions were incubated for an additional 48 h.
The thiol concentration in the incubation medium containing the bacteria culture and polymer was significantly higher than that of incubation medium with polymer and bacteria individually [post hoc Dunnett (2-sided) test, p < 0.05] (Table 4).
Preliminary experiments carried out using corneas held in MegaCell™MEM and transferred to the same medium containing 4 % PEG 10,000 indicated that this polymer would thin them with minimal endothelial cell loss over a 14 day period.
Among the various initial [PO4 3-] theted, the medium containing initially 25 mM of [PO4 3-] resulted in the higher polymer production after 72 h of cultivation (Table 1), consistent with the report that the initial [PO4 3-] in the culture medium influences both the cell density and the PHAs production (Lee et al. 2000).
Interfacial deposition of preformed polymer technique is based upon interfacial deposition of a polymer followed by diffusion of a semi-polar and miscible solvent in aqueous medium containing surfactant (Fessi et al. 1989; Barichello et al. 1999).
Table 1 PLA-like polymer production in engineered C. glutamicum a Relevant genes Cell dry weight (g/L) Polymer content (wt%) None (wild-type control) 11.4 ± 1.7 NDb phaC1STQK, pct, ldhA 10.7 ± 2.0 0.27 ± 0.01 epctC1STQK, pct, ldhA 9.3 ± 0.5 1.19 ± 0.01 aCells were grown on 2 mL MMTG medium containing glucose for 72 h at 30°C.
