1
|
Mikušová L, Ciesarová Z, Hromádková Z, Valachovišová M, Penesová A, Kajaba I, Holubková A, Krajčíová Ľ, Mislovišová D, Bobrík M, Šturdík E. Novel cereal fibre drink as a tool for civilisation disease prevention. Quality Assurance and Safety of Crops & Foods 2014. [DOI: 10.3920/qas2013.0372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- L. Mikušová
- Institute of Biochemistry, Nutrition and Health Protection, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia
| | - Z. Ciesarová
- National Agricultural and Food Centre, Food Research Institute, Priemyselná 4, 824 75 Bratislava, Slovakia
| | - Z. Hromádková
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - M. Valachovišová
- Department of Bioactive Compounds in Food, Slovak Medical University, Limbová 14, 833 01 Bratislava, Slovakia
| | - A. Penesová
- Institute of Experimental Endocrinology, Slovak Academy of Sciences, Vlárska 3, 833 06 Bratislava, Slovakia
| | - I. Kajaba
- Department of Bioactive Compounds in Food, Slovak Medical University, Limbová 14, 833 01 Bratislava, Slovakia
| | - A. Holubková
- Institute of Biochemistry, Nutrition and Health Protection, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia
| | - Ľ Krajčíová
- First Department of Neurology, University Hospital, Comenius University, Mickiewiczova 13, 813 69 Bratislava, Slovakia
| | - D. Mislovišová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - M. Bobrík
- Department of Physical Education, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia
| | - E. Šturdík
- Institute of Biochemistry, Nutrition and Health Protection, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 81237 Bratislava, Slovakia
| |
Collapse
|
2
|
Hromádková Z, Kost'álová Z, Ebringerová A. Comparison of conventional and ultrasound-assisted extraction of phenolics-rich heteroxylans from wheat bran. Ultrason Sonochem 2008; 15:1062-8. [PMID: 18534894 DOI: 10.1016/j.ultsonch.2008.04.008] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2008] [Revised: 04/09/2008] [Accepted: 04/21/2008] [Indexed: 05/24/2023]
Abstract
Various two-step extraction procedures with and without a short application of ultrasound in the first step at various reaction conditions (extracting agent, temperature and time), and constant conditions in the second step (5% NaOH, room temperature, 60 min) were used to isolate the hemicellulose component of industrial wheat bran. The polysaccharides recovered from the extracts were characterised by yield, chemical composition and radical scavenging activity. Similar total yields of polysaccharides were achieved by a short ultrasound-assisted extraction (up to 10 min) in the first step using 0.5% or 2% NaOH, when compared to the classical extraction lasting 60 min, what represents a shortening of the process by about 60% and lower consumption of the NaOH. The extracted polysaccharides comprised a complex of phenolics-rich heteroxylans contaminated to various extents with co-extracted amylose-rich starch as well as protein, which can be in part governed by the extraction conditions. The water-soluble fractions from both the classical and ultrasonics experiments were shown to exhibit significant radical scavenging activity in vitro, indicating their potential application as polysaccharide-based antioxidants.
Collapse
Affiliation(s)
- Z Hromádková
- Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia.
| | | | | |
Collapse
|
3
|
Vodenicarová M, Drímalová G, Hromádková Z, Malovíková A, Ebringerová A. Xyloglucan degradation using different radiation sources: a comparative study. Ultrason Sonochem 2006; 13:157-64. [PMID: 15935720 DOI: 10.1016/j.ultsonch.2005.03.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2004] [Accepted: 03/29/2005] [Indexed: 05/02/2023]
Abstract
Tamarind seed xyloglucan was subjected to different radiation sources-ultrasound, gamma-radiation, and microwave heating, and the effects of these energies upon its molecular and structural properties were characterised by gel permeation chromatography, viscometry, sugar analysis, FT-IR and NMR spectroscopic techniques. In dependence on the degradation methods and experimental conditions used, the decrease of the relative molecular mass (RMM) was accompanied with alteration of the primary structure. Depolymerisation by ultrasound at a frequency of 20 kHz yielded after 120 min products with RMM of about 131 x 10(3) without significant alteration of the primary structure of the polysaccharide. Intense degradation of XG started by microwave heating at pH 1.5 yielding polymers with RMM in the range of higher oligosaccharides, however, with changed sugar composition due to cleavage of the glycosyl side chains. At gamma-irradiation doses >40 kGy, next to chain cleavage, very high-molecular mass components exhibiting UV(254)-absorption were formed, and the RMM decreased to about 50 x 10(3) at the highest applied dose (100 kGy). The results of the comparative study suggest that ultrasonication was the most convenient procedure to decrease the RMM of xyloglucan to 130 x 10(3) and preserve the primary structure of the polysaccharide.
Collapse
|
4
|
Abstract
Various one- and two-step extraction procedures with and without a short application of ultrasound at the beginning of the extraction were used to examine the effect of sonication on the extractibility of the hemicellulose components of buckwheat hulls. The polysaccharides recovered from the extracts were characterised by yield as well as composition determined by chemical methods and spectroscopic techniques. They comprised a complex of glucuronoxylan and co-extracted amylose-rich starch in various proportions contaminated with other cell wall components (protein, pectic polysaccharides). The hemicellulose fractions obtained by classical and ultrasound-assisted extraction exhibited significant immunomodulatory activities. The increased yield of ultrasonically extracted hemicelluloses, which have preserved their structural and molecular properties as well as immunological activity, confirmed the importance and great potential of ultrasound-assisted extraction of industrially important polysaccharides from different tissues of plant materials.
Collapse
Affiliation(s)
- Z Hromádková
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 842 38 Bratislava, Slovak Republic
| | | |
Collapse
|
5
|
Abstract
From the leaves of Plantago lanceolata, the green parts of Rudbeckia fulgida, the aerial parts of Salvia officinalis and the roots of Valeriana officinalis, crude polysaccharides have been isolated by extraction with water and further purified and fractionated by various techniques. The water-soluble polysaccharides obtained were examined for their immunomodulatory activities using the in vitro mitogenic and comitogenic rat thymocyte tests. The results indicate that in spite of the considerable differences in chemical composition and structural properties, the tested polysaccharides exhibited similar significant immunomodulatory properties with a particularly high adjuvans activity in the case of the Rudbeckia and Salvia polysaccharides. The pectic polysaccharide-rich complex from Valeriana was shown to also stimulate the immune function of bone marrow cells.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, SK-842 38, Bratislava, Slovak Republic.
| | | | | | | |
Collapse
|
6
|
Hromádková Z, Ebringerová A, Sasinková V, Šandula J, Hřı́balová V, Omelková J. Influence of the drying method on the physical properties and immunomodulatory activity of the particulate (1→3)-β-d-glucan from Saccharomyces cerevisiae. Carbohydr Polym 2003. [DOI: 10.1016/s0144-8617(02)00110-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
7
|
Abstract
Various two-step extraction procedures with and without a short application of ultrasound in the first step were used to examine the effect of sonication on the extractibility and properties of the non-cellulose components of industrial corn bran (CB). The polysaccharides recovered from the extracts of the first (FI) and second (FII) extraction step were characterised by yield and composition. Using water as extractant in the first step, similar yields of total extracted polysaccharides (FI + FII) were obtained by the short sonication treatment when compared to the classical procedures using H2O2-containing alkaline media in the first step. The yields of FI + FII showed a substantial increase (10-40%) after application of ultrasound in 1% and 5% NaOH in comparison to those of the classical procedures. The content of the neutral sugar components constituting the CB xylan varied from 65 to 88 mol% in dependence on the conditions used in the first extraction step.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 9, 842 38 Bratislava, Slovakia.
| | | |
Collapse
|
8
|
Ebringerová A, Kardosová A, Hromádková Z, Malovíková A, Hríbalová V. Immunomodulatory activity of acidic xylans in relation to their structural and molecular properties. Int J Biol Macromol 2002; 30:1-6. [PMID: 11893388 DOI: 10.1016/s0141-8130(01)00186-6] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structure/function relationship of two acidic heteroxylan types, the arabino-(glucurono)xylan from corn cobs (AGX) and 4-O-methylglucuronoxylans (GXs) from beechwood and three medicinal herbs (Rudbeckia, Altheae, and Mahonia), has been studied. The effect of the molecular mass of AGX, as well as the content and distribution of the 4-O-methylglucuronic acid side chains in GXs on the immunological activity of these xylans was characterized by their biological response in the mitogenic and comitogenic thymocyte in vitro tests. Depolymerization of AGX by ultrasonication resulted in unequivocal decrease of the immunomodulatory activity, whereas already a short treatment by endo-beta-1,4-xylanase brought about a significant increase in its activity when applied in the highest dose. In the case of the GX samples, neither the uronic acid content nor the distribution pattern of the uronic acid side chains was found to be determinant for the expression of their immunomodulatory activity.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 842 38 Bratislava, Slovakia.
| | | | | | | | | |
Collapse
|
9
|
Hromádková Z, Ebringerová A, Valachovic P. Ultrasound-assisted extraction of water-soluble polysaccharides from the roots of valerian (Valeriana officinalis L.). Ultrason Sonochem 2002; 9:37-44. [PMID: 11602994 DOI: 10.1016/s1350-4177(01)00093-1] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The insoluble plant residues, obtained after preparation of medicinal tinctures from the roots of valerian (Valeriana officinalis L.) by classical and ultrasound-assisted extraction with aqueous ethanol in a pilot plant, were subsequently treated with hot water to isolate the accessible polysaccharide cell wall components. At almost equal amounts of the hot-water extractable material, the yields of the recovered polysaccharides were lower in the ultrasonical experiment. This is due to the fact that a part of accessible polysaccharides were already solubilised by the aqueous ethanol and recoverable from the medicinal tincture. Therefore, the net yield of extracted polysaccharides was enhanced in the ultrasonical procedure. This fact as well as the sugar composition and structural features of the isolated polysaccharides suggest that ultrasonication have attacked the integrity of cell walls, released and degraded its most accessible polysaccharides (pectic polysaccharides and starch) and increased also the extractibility of its less accessible components--xylan, mannan and glucan. The water-soluble polysaccharide fractions from both the conventional and ultrasonical experiments exhibit significant immunostimulatory activities in mitogenic and comitogenic thymocyte tests.
Collapse
Affiliation(s)
- Z Hromádková
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska Cesta 9, 842 38 Bratislava, Slovak Republic
| | | | | |
Collapse
|
10
|
|
11
|
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Science, Bratislava, Slovak Republic
| | | |
Collapse
|
12
|
Kačuráková M, Wellner N, Ebringerová A, Hromádková Z, Wilson R, Belton P. Characterisation of xylan-type polysaccharides and associated cell wall components by FT-IR and FT-Raman spectroscopies. Food Hydrocoll 1999. [DOI: 10.1016/s0268-005x(98)00067-8] [Citation(s) in RCA: 211] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
13
|
Hromádková Z, Ebringerová A, Valachovic P. Comparison of classical and ultrasound-assisted extraction of polysaccharides from Salvia officinalis L. Ultrason Sonochem 1999; 5:163-168. [PMID: 11269956 DOI: 10.1016/s1350-4177(98)00046-7] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
After preparation of medicine tinctures from the herbal plant Salvia officinalis by classical and ultrasound-assisted extraction with aqueous ethanol, the insoluble plant residues were subsequently treated with hot water and dilute alkali to isolate polysaccharide cell wall components. The yields of the hot water extract as well as total extracted polysaccharides were higher in the case of the ultrasound-treated plant in both laboratory and pilot plant experiments. The water-extractable polysaccharide fractions, in all cases, contained glucose, galactose and arabinose as main sugar components, whereas the alkali-extractable fractions were rich in xylans. The fractions also contained considerable amounts of proteins. The water-soluble polysaccharides may contribute to the biological activity of the plant decoction. The results indicate that the addition of a subsequent extraction step during the preparation of the herbal tincture might contribute to a better exploitation of the raw material.
Collapse
Affiliation(s)
- Z Hromádková
- Institute of Chemistry, Slovak Academy of Sciences, 842 38 Bratislava, Slovak Republic
| | | | | |
Collapse
|
14
|
Ebringerová A, Hromádková Z, Høíbalová V. Ultrasound-mediated Extraction of the Immunologically Active Xylan Component of Corn Cobs. Carbohydr Polym 1997. [DOI: 10.1016/s0144-8617(97)87374-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
15
|
Abstract
Ultrasonic irradiation of a water-soluble corn hull xylan fraction in neutral and alkaline aqueous medium has been found to produce significant changes in its molecular properties. Degradation is first manifested by a decrease in the large molar mass component under generation of polymer chains with about the same size as those of the main molar mass component. The latter is slightly shifted to the lower molar mass region only at stronger irradiation conditions. Ultrasonication of the xylan in neutral aqueous medium at high ultrasound power and/or long irradiation caused no significant changes in its sugar composition, primary structure and viscoelastic properties.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
| | | |
Collapse
|
16
|
Abstract
Changes in the structural, molecular and functional properties of the immunogenic corn cob xylan evoked by ultrasonication in water, 1% NaOH and 5% NaOH were investigated. The reduction of the high molar mass (MM) fraction was more intense than that of the medium MM fraction, depending on the sonic power, sonication time, and alkali concentration. The chain degradation was more effective in the alkaline media. The UV-absorbing component, accompanying the xylan polymers in the whole MM range, showed an accumulation in the high MM region as well as shiftening to higher sizes, particularly in 5% NaOH. The sugar composition and primary structure of the xylan was almost retained under all irradiation conditions studied. Although the biological activity of the xylan was affected by the ultrasound, no significant decrease of the biological response was found at short irradiation time and low sonic power.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
| | | | | | | |
Collapse
|
17
|
Abstract
Various structurally different water-soluble (ws) and water-insoluble (wis) heteroxylans have been tested for mitogenic and co-mitogenic activity and shown to differ in their stimulating potency. The ws arabinoglucuronoxylan (ws-AGX) from corn cobs exhibited the highest potency which was comparable to that of the immunomodulator zymosan, whereas the wis-AGX from corn cobs was inactive. Water-soluble derivatives of wis-AGX as well as hydrolytically modified ws-AGX fractions were prepared and tested for their mitogenic and co-mitogenic activity. The results indicate that the disaccharide side chains present only in ws-AGX might be important for expression of the immunostimulatory activity of this xylan.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
| | | | | |
Collapse
|
18
|
|
19
|
|
20
|
|
21
|
Abstract
A water-soluble L-arabino-D-xylan, obtained from the chlorite holocellulose of de-lipidated, de-starched, and de-pectinated rye bran by ammoniacal extraction, was composed of L-Ara and D-Xyl in the molar ratio 7.8:10 and had Mw 36,500 and Mn 26,950. The backbone of the polysaccharide was shown to comprise (1----4)-linked beta-D-Xylp residues, with approximately 41% unsubstituted, approximately 33% 2- or 3-substituted, and approximately 26% disubstituted. Single alpha-L-Araf groups were attached to the xylan core; only a small proportion was 2-, 3-, or 5-linked.
Collapse
Affiliation(s)
- A Ebringerová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Czechoslovakia
| | | | | | | |
Collapse
|
22
|
|