| galactomannans from brazilian seeds: characterization of the oligosaccharides produced by mild acid hydrolysis. | galactomannans with man:gal ratios ranging from 1.1:1 to 3:1, obtained from the seeds of mimosa scabrella, stryphnodendron barbatiman, schizolobium parahybum and schizolobium amazonicum, were submitted to mild acid hydrolysis. the products were fractionated by gel permeation chromatography on biogel p2 yielding fractions with degrees of polymerization (dp) of 1 to 6. those with dp 2 to 6 from each species were analysed by ion-exchange high-performance liquid chromatography and characterized by 1 ... | 1995 | 7772557 |
| galactomannan from the seeds of mimosa scabrella: a scale-up process. | in view of the wide industrial applications of galactomannans as a thickening agent, those of mimosa scabrella (bracatinga), a leguminous tree abundant in southern brazil, are under investigation. seeds of bracatinga were processed on a pilot plant scale in order to obtain its galactomannan. the process consisted of successive milling, enzyme inactivation, aqueous extraction, precipitation of polysaccharide, and drying and milling. the product was obtained in 20% yield, with characteristics simi ... | 1997 | 9283028 |
| role of galactomannan composition on the binary gel formation with xanthan. | the influence of the galactomannan characteristic ratios (m/g) on the temperature of gelation (tg) and the gel strength of mixtures of galactomannan with xanthan is reported. two galactomannans were investigated: one highly substituted from the seeds of mimosa scabrella (m/g = 11), and the other, less substituted, from the endosperm of schizolobium parahybae, with (m/g = 30) [ganter jlms, zawadzki-baggio sf, leitner sc, sierakowski mr, reicher f. j carbohydr chem 1993;12:753]. the xanthan:galact ... | 1999 | 10569283 |
| effects of substrates composed of biosolids on the production of eucalyptus viminalis, schinus terebinthifolius and mimosa scabrella seedlings and on the nutritional status of schinus terebinthifolius seedlings. | six substrates made up with heated and composted anaerobic biosolid were tested for the production of eucalyptus viminalis, schinus terebinthifolius and mimosa scabrella forest seedlings in a nursery in southern brazil. the produced seedlings were statistically evaluated in relation to height, stem diameter, height/stem diameter ratio, aerial and root dry biomass, survival, and also for nutritional status on s. terebinthifolius seedlings. as a function of their high ph, heated biosolids turned o ... | 2002 | 12479477 |
| in vitro and in vivo antiviral properties of sulfated galactomannans against yellow fever virus (beh111 strain) and dengue 1 virus (hawaii strain). | two galactomannans, one extracted from seeds of mimosa scabrella, having a mannose to galactose ratio of 1.1, and another with a 1.4 ratio from seeds of leucaena leucocephala, were sulfated. the products from m. scabrella (brs) and l. leucocephala (lls) had a degree of sulfation of 0.62 and 0.50, and an average molecular weight of 620x10(3) and 574x10(3) gmol(-1), respectively. their activities against yellow fever virus (yfv; beh111 strain) and dengue 1 virus (den-1; hawaii strain) were evaluat ... | 2003 | 14638396 |
| evaluation of xanthan and highly substituted galactomannan from m. scabrella as a sustained release matrix. | a highly substituted galactomannan (g) from mimosa scabrella bentham (man:gal 1.1:1), isolated from the seeds of a brazilian leguminous tree and xanthan (x), an exopolysaccharide secreted by xanthomonas campestris (keltrol), were evaluated as a hydrophilic matrix system (xg) for controlled release (cr) of diclofenac sodium (ds) in tablets and capsules. the performance of xg (2:1) matrices containing 50 mg (a) or 100 mg (b) of ds was compared with a commercial cr product of ds. the drug release s ... | 2004 | 15129986 |
| xanthan and galactomannan (from m. scabrella) matrix tablets for oral controlled delivery of theophylline. | directly compressed theophylline tablets, containing commercial xanthan (x) (keltrol) and a highly hydrophilic galactomannan (g) from the seeds of mimosa scabrella (a brazilian leguminous tree called bracatinga) as release-controlling agents, were obtained. gums were used at 4, 8, 12.5 and 25% (w/w), either alone or in mixture (x:g 1:1). during galactomannan extraction process, the biopolymer was dried in a scale up, by vacuum oven (vo) or spray dryer (sd). the in vitro drug release was evaluate ... | 2005 | 15885450 |
| burkholderia nodosa sp. nov., isolated from root nodules of the woody brazilian legumes mimosa bimucronata and mimosa scabrella. | three strains, br3437(t), br3461 and br3470, were isolated from nitrogen-fixing nodules on the roots of mimosa scabrella (br3437(t)) and mimosa bimucronata (br3461, br3470), both of which are woody legumes native to brazil. on the basis of 16s rrna gene sequence similarities, all the strains were shown previously to belong to the genus burkholderia. a polyphasic approach, including dna-dna hybridizations, pfge of whole-genome dna profiles, whole-cell protein analyses, fatty acid methyl ester ana ... | 2007 | 17473258 |
| two galactomannan preparations from seeds from mimosa scabrella (bracatinga): complexation with oxovanadium(iv/v) and cytotoxicity on hela cells. | two galactomannans, galman-a and galman-b, were isolated from seeds of mimosa scabrella (bracatinga), with deactivation and exposure to native enzymes, respectively. they were treated with oxovanadium(iv) and oxovanadium(v), designated (vo(2+)/vo(3+)) to form galman-a:vo(2+)/vo(3+) and galman-b:vo(2+)/vo(3+) complexes, respectively. the potentiometric studies provided the binding constants for the complexes and the resulting complexed species were a function of ph. (51)v nmr spectra of galman-a: ... | 2009 | 19230977 |
| in vitro antiherpetic and antirotaviral activities of a sulfate prepared from mimosa scabrella galactomannan. | a chemically sulfated galactomannan (brs) from seeds of mimosa scabrella had in vitro antiviral activity against herpes simplex virus 1 (hsv-1), but not against simian rotavirus a/sa11 (sirv-a/sa11). it was examined by (13)c nmr spectroscopy, which showed the sulfate groups to be mainly at c-6 of galactose residues. brs had a selective inhibition against hsv-1 during its attachment step, having an ic(50) lower than 2.5microg/ml, determined by plaque reduction, and a selectivity index of greater ... | 2009 | 19751759 |
| comparative pollen preferences by africanized honeybees apis mellifera l. of two colonies in pará de minas, minas gerais, brazil. | the aim of this study was to investigate the polliniferous floral sources used by apis mellifera (l.) (africanized) in an apiary situated in pará de minas, minas gerais state, and evaluate the pollen prefences among the beehives. two beehives of langstroth type with frontal pollen trap collectors were used. the harvest was made from september 2007 to march 2008, with three samples of pollen pellets colected per month per beehive. the subsamples of 2 grams each were prepared according to the euro ... | 2010 | 20563410 |
| rheological characterization of o/w emulsions incorporated with neutral and charged polysaccharides. | the effects of polysaccharides, including xyloglucan from hymenaea courbaril (xg), galactomannans from schizolobium parahybae (gmsp) and mimosa scabrella (gmms), xanthan gum (xt), sodium hyaluronate (hna) and fucogel(®) (fg), on the rheological behavior of cosmetic emulsions were evaluated. these incorporations gave rise to six emulsified systems, denoted xge, gmspe, gmmse, xte, hnae and fge, respectively. the emulsion consistency was found to follow the trend gmspe>xge>hnae>fge>xte>gmmse. in ge ... | 2012 | 23465929 |
| diversity and symbiotic effectiveness of beta-rhizobia isolated from sub-tropical legumes of a brazilian araucaria forest. | while the occurrence of betaproteobacteria occupying the nodules of tropical legumes has been shown, little is known about subtropical areas. araucaria forest is a subtropical endangered ecosystem, and a better understanding of the legume-rhizobial symbionts may allow their use in land reclamation. the 16s rrna gene of bacteria isolated from nine leguminous species was sequenced and their nodulation tested in mimosa scabrella and phaseolus vulgaris. 196 isolates were identified as eight genotype ... | 2013 | 23861038 |
| topical anti-inflammatory activity of a monofloral honey of mimosa scabrella provided by melipona marginata during winter in southern brazil. | melipona marginata is an endangered species of stingless bee from brazil that produces honey with particular physicochemical features and a remarkable exotic flavor. to the best of our knowledge, this is the first report devoted to exploring the medicinal potential of this honey. thus, the aim of this paper was to investigate the potential anti-inflammatory activity of honey extract from m. marginata on skin inflammation. the honey sample was classified as a monofloral honey of mimosa scabrella. ... | 2014 | 24650139 |
| proteome comparison for discrimination between honeydew and floral honeys from botanical specie mimosa scabrella bentham by principal component analysis. | due to increasing valuation and appreciation of honeydew honey in many european countries and also to existing contamination among different kinds of honeys, the authentication is an important aspect of quality control and its regard with the origin guarantee in terms of source, honeydew or floral, needs to be determined. furthermore, belonging to the minority composition of the honey, beyond of the importance of its physiological effects, proteins can differ according to these sources. in this ... | 2017 | 28337740 |