M. del Pilar Sánchez-Saavedra

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The thickness of the walls of the capsules of chitosan-immobilized Synechococcus cultures was dependent on the time of contact with NaOH and was directly related to culture growth. After an initial lag phase, probably caused by cell damage, the capsules obtained after 80 s in a 0.1 N NaOH solution showed better growth than that of free cell cultures (6.9(More)
Coating with polymers and re-calcifying have been done to retard the liberation of immobilized cells. Considering that sodium tripolyphosphate (TPP) is highly effective for chelating calcium ions, it is possible to postulate that if a layer of TPP is deposited over calcium alginate beads, the strong interaction between TPP ions and calcium may help in(More)
Vibrio alginolyticus, Vibrio campbellii, and Vibrio harveyi were inhibited by Isochrysis galbana in batch cultures. I. galbana reduced the V. alginolyticus, V. campbellii, and V. harveyi counts to undetectable levels in 2, 4, and 7 days (<0.01 Vibrio spp. mL−1), respectively, remaining so until the end of the experiment on day 15. Other heterotrophic(More)
Synechococcus elongatus cells were immobilized in alginate beads, and the effects of increasing the cross-linker concentration from 2 to 4 % CaCl2 were evaluated, as well as the effects of coating the beads with either glycerol or poly(ethylene glycol) methyl ether methacrylate (PEGMA)—not previously reported for immobilized microalgae—to improve the(More)
This study examined the co-immobilization of the cyanobacterium Synechococcus elongatus with the plant growth-promoting bacterium Azospirillum brasilense in alginate beads and its potential application for the removal of phosphorus from aquaculture wastewater. Co-immobilization of both microorganisms significantly increased the cell density of S. elongatus(More)
The in vitro digestibility of lipids from Chaetoceros muelleri that were cultured in Guillard medium (F/2) and agricultural fertilizer medium (AF/2) and performance index was examined in enzymatic extracts of Litopenaeus vannamei larvae. The highest enzymatic activity (EA) of lipases was observed in Zoea I (1.53 ± 0.14 EA/10 EU) and Mysis I (1.26 ± 0.01(More)
Removal of nitrogen and phosphorous by immobilized microalgae is an advantageous approach for wastewater treatment. Although immobilized microalgae cells remain viable to remove nutrients for several weeks, early leakage of cells because of deterioration of the capsules prevents further use of the immobilized microalgae. This study aimed at increasing the(More)
We determined the effects of various light spectra (white, green, blue, and red) on the growth rate, biochemical composition, and fatty acid content of Tisochrysis lutea (Haptophyta, Isochrysidales) maintained in batch cultures. The growth rate peaked with white and blue light, and the lowest rate was observed with green and red light. The chlorophyll a(More)
Geitlerinema lemmermannii is a cosmopolitan cyanobacterium that is highly adapted to natural and artificial environments in which concentrations of phosphorus and nitrogen have been altered. G. lemmermannii was detected and isolated from the wastewater discharge of Mexican shrimp cultures. Its nutrition and potential incorporation into wastewater treatment(More)
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