Sucrose Ester
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. MicropropagaÃÃo calogÃnese e irradiaÃÃo da figueira "Roxo de valinhos" / Micropropagation, callogenesis and irradiation of fig plants âRoxo de Valinhosâ
It was carried out three in vitro works with âRoxo de Valinhosâ fig plants. The first one aimed to verify the sensibility of explants to gamma radiation and the plantlets were separated by size (2,5 to 4,5; 5 to 7 and 8 to 10 cm) and were taken to the Nuclear Energy Center, irradiated on the doses 10, 20,30,40 e 50 Gy and cutted separating the bud portion:
Publicado em: 2006
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14. Estudo da influência do solvente, carboidrato e ácido graxo na síntese enzimática de ésteres de açúcares
The aim of this work was to gain knowledge of enzymatic processes for the synthesis fatty acid esters of sugar, with the objective to develop an enzymatic process for the preparation of non-toxic biodegradable surface-active agents derived entirely from renewable resources. A wide range of data were collected for reaction conditions involving different sugar
Química Nova. Publicado em: 2005-10
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15. Estudo fitoquimico de Poecilanthe parviflora Benth. e Lonchocarpus atropurpureus Benth. (Leguminosae) isolamento, determinação estrutural e atividade biologica
Dichloromethanic extract from Poecilanthe parviflora roots was submitted to chromatographic analysis and furnished a mixture of steroids ( campesterol 1, b-sitosterol 2 and stigmasterol 3) and an unsaturated fatty acid methyl ester(C-22, three unsaturations) 6. Acetylation of methanolic extract followed by chromatographic analysis furnished peracetylated suc
Publicado em: 1978
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16. Phosphoenolpyruvate-dependent sucrose phosphotransferase activity in Streptococcus mutans NCTC 10449.
A phosphoenolpyruvate-dependent sucrose phosphotransferase system (PTS) has been demonstrated, by an enzyme-coupled reaction and product isolation, in decryptified cell suspensions of the cariogenic microorganism Streptococcus mutans NCTC 10449. The apparent sucrose PTS reaction for sucrose-adapted, sucrose-challenged cells displayed saturation kinetics with
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17. Changes in Cellular Fatty Acid Composition of Cephalosporium acremonium during Cephalosporin C Production
Cephalosporium acremonium was cultivated in fermentation medium containing sucrose or methyl oleate as a carbon source for cephalosporin C production. The level of antibiotic production was 48 g of cephalosporin C per liter under optimum conditions when methyl oleate was used. The C18:1 (oleic acid) methyl ester appeared to be utilized faster than the C18:2
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18. Protochlorophyll Biosynthesis in a Cell-free System from Higher Plants 1
A cell free system prepared from etiolated cucumber (Cucumis sativus, L) in tris-sucrose buffer is able to incorporate δ-aminolevulinic acid-4- 14C into the two components of protochlorophyll: protochlorophyllide and protochlorophyllide ester. The activity is associated with the etioplasts. Optimal incorporation is obtained at pH 7.7. For the formation of p
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19. Structure-activity study of inhibition of amphotericin B (Fungizone) binding to sterols, toxicity to cells, and lethality to mice by esters of sucrose.
The effects of four monoesters of sucrose with different acyl chain lengths (palmitate, C16; myristate, C14; laurate, C12; and caprate, C10) on the aggregation state of amphotericin B (AmB), its binding to cholesterol and ergosterol, its toxicity to cells, and its lethality to mice were determined. In solution, all four of these esters inhibited AmB binding
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20. Purification and Characterization of a Human Neutrophil Neutral Protease: THE NEUTRAL PEPTIDE-GENERATING PROTEASE
A human neutrophil neutral protease which generates a low molecular weight peptide from a plasma protein substrate and cleaves the basic amino acid ester substrates α-N-p-tosyl-l-arginine methyl ester HCl, α-N-benzoyl-l-arginine-methyl ester HCl, and α-N-carbobenzoxy-l-lysine-p-nitrophenyl ester has been purified to homogeneity and distinguished from the
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21. Metabolism of 14C-Chlorobenzilate and 14C-Chloropropylate by Rhodotorula gracilis1
Rhodotorula gracilis metabolizes Chlorobenzilate (ethyl 4,4′-dichlorobenzilate) and Chloropropylate (isopropyl 4,4′-dichlorobenzilate) to several metabolites in a basal medium supplemented by sucrose and by several intermediates of the citric acid cycle. Three identified metabolites resulting from the degradation of either acaricide, were 4,4′-dichloro
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22. Antiviral Effects of Amphotericin B Methyl Ester
The methyl ester of amphotericin B (AME) is water soluble, retains antifungal activity, and is significantly less toxic in mammals than amphotericin B. In contrast to amphotericin B, which is not water soluble, AME exhibits antiviral effects against vesicular stomatitis virus, herpes simplex virus types 1 and 2, Sindbis virus, and vaccinia virus in a plaque
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23. Partial characterization of gamma (immune) interferon mRNA extracted from human lymphocytes.
gamma (immune) interferon (IFN-gamma) was induced in cultures of fresh human lymphocytes by combined treatment with a phorbol ester (12-O-tetradecanoylphorbol 13-acetate, TPA) and the T cell mitogen phytohemagglutinin (PHA). Compared to the IFN-gamma yields obtained with PHA induction alone, the inclusion of TPA caused a significant enhancement of IFN-gamma
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24. Tween 80 effect on glucosyltransferase synthesis by Streptococcus salivarius.
Streptococcus salivarius (ATCC 25975) produced very low or nondetectable amounts of the extracellular enzyme glucosyltransferase (GTase) when grown in a chemically defined medium. The addition of Tween 80 to this medium resulted in the production of markedly enhanced levels of the enzyme. Oleic acid, the methyl ester of oleic acid, and sucrose each could not