The catalytic activity of layered double hydroxide (LDH) and the aqueous solution absorption capacity of ureasil polyethylene oxide (U-PEO) were combined to produce an easily recyclable solid-liquid (S-L) reactor (U-PEO:LDH). Scanning electron microscopy (SEM), X-ray diffraction (XRD) and small-angle X-ray scattering (SAXS) of LDH (CuZnAl), U-PEO, and U-PEO:LDH confirmed the layered structure of the catalyst and evidenced its inclusion in the free volume of U-PEO matrix. The catalytic activity of the CuZnAl in the composite prepared with different amounts of LDH, towards degradation of the Acid Blue 29 (AB29) dye by a heterogeneous Fenton-like process was investigated, and the results evidenced a maximum efficiency (96%) for composite with 10 wt.% of LDH. Recyclability assessments demonstrated that the superior performance of the U-PEO:LDH reactor was sustained over several cycles (4). The U-PEO:LDH reactor proposed in this work has excellent potential as a heterogeneous catalyst for effective dye removal in environmental applications. (LDH UPEO U PEO (U-PEO solidliquid solid liquid SL S L (S-L UPEOLDH. UPEOLDH . (U-PEO:LDH) SEM, SEM , (SEM) Xray X ray XRD (XRD smallangle small angle SAXS (SAXS CuZnAl, (CuZnAl) UPEO, PEO, matrix 2 AB29 AB (AB29 Fentonlike Fenton like investigated 96% 96 (96% 1 wt wt. 4. 4 (4) applications (U-PEO:LDH (SEM (CuZnAl AB2 (AB2 9 (96 (4 (AB (9 (

A specific antiserum to Candida albicans serotype A was prepared adsorbing a total antiserum with Candida albicans serotype B cells. This specific antiserum was used for serotyping C. albicans strains obtained from patients in different hospitals of Havana City, Cuba. Two hundred strains (95.2%) were serotype A, the remaining 10 (4.8%) were serotype B. Results were also correlated with strains isolated from the specimen origin, sex and race of the patient. The usefulness of this specific antiserum to determine C. albicans serotypes and its therapeutic value are pointed out.