Investigation of polysaccharide composition in medicinal and non-medicinal aloes

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
LI Ahl ◽  
HL Pedersen ◽  
WGT Willats ◽  
N Rønsted ◽  
OM Grace
Keyword(s):  
Polysaccharide Composition

scholarly journals Ultrasound treatment of crushed grapes: Effect on the must and red wine polysaccharide composition

2021 ◽  
pp. 129669
Author(s):  
Leticia Martínez Lapuente ◽  
Zenaida Guadalupe ◽  
Belén Ayestarán ◽  
Paula Pérez-Porras ◽  
Ana Belén Bautista-Ortín ◽  
...  
Keyword(s):  
Red Wine ◽  
Ultrasound Treatment ◽  
Polysaccharide Composition

Strain distribution and in planta production of an extracellular polysaccharide depolymerase from Bradyrhizobium japonicum

1992 ◽  
Vol 38 (8) ◽  
pp. 857-861 ◽  
Author(s):  
Michael F. Dunn ◽  
Arthur L. Karr
Keyword(s):  
Bradyrhizobium Japonicum ◽  
Root Nodules ◽  
Extracellular Polysaccharide ◽  
Extracellular Polysaccharides ◽  
Neutral Sugar ◽  
In Planta ◽  
In Vitro Production ◽  
Polysaccharide Composition ◽  
Vitro Production

Thirty-four strains of Bradyrhizobium japonicum were screened for the in vitro production of an extracellular polysaccharide depolymerase active against the B. japonicum acidic extracellular polysaccharide that contains mannose, glucose, galactose, and 4-O-methylgalactose as neutral sugar components. Over 90% of tested strains producing this type of extracellular polysaccharide also produced the extracellular polysaccharide depolymerase, whereas strains producing a compositionally different extracellular polysaccharide did not. In addition, representatives of species related to B. japonicum by extracellular polysaccharide composition or host range were also phenotypically depolymerase negative. Depolymerase was also present in soybean root nodules formed by B. japonicum strain 2143. In contrast to the cell-associated depolymerase activity found in free-living cells of this strain, most of the depolymerase activity present in nodules is free of the bacteroids. The widespread occurrence of the depolymerase among B. japonicum strains and the spatiotemporal distribution of its activity in planta are consistent with the enzyme playing a role in the removal of surface extracellular polysaccharide from the microorganism during the infection of nodulation process. Key words: Bradyrhizobium japonicum, soybean, extracellular polysaccharides, extracellular polysaccharide depolymerase, bacteroids.

Seasonal variations in a polysaccharide composition of Far Eastern red seaweed Ahnfeltiopsis flabelliformis (Phyllophoraceae)

2017 ◽  
Vol 30 (1) ◽  
pp. 535-545 ◽  
Author(s):  
A. O. Kravchenko ◽  
A. O. Byankina Barabanova ◽  
V. P. Glazunov ◽  
I. M. Yakovleva ◽  
I. M. Yermak
Keyword(s):  
Seasonal Variations ◽  
Red Seaweed ◽  
Polysaccharide Composition ◽  
Ahnfeltiopsis Flabelliformis ◽  
Far Eastern

scholarly journals PROSPECTS OF USE OF CRYSTOBILIZING PROTEIN-POLYSACCHARID COMPOSITION IN THE PRODUCTION OF MEAT CUTTED SEMI-FOODS

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
I. Shevchenko ◽  
G. Polishchuk ◽  
Ye. Kotliar ◽  
T. Osmak ◽  
A. Skochko
Keyword(s):  
Plasma Proteins ◽  
Raw Materials ◽  
Meat Products ◽  
Sodium Caseinate ◽  
Amorphous Structure ◽  
Organoleptic Characteristics ◽  
Duration Of Storage ◽  
Polysaccharide Composition ◽  
Minced Meat

One of the technological ways to improve the quality of frozen meat chopped semi-finished products is to use in their composition protein-polysaccharide composite mixtures, which mechanism of cryoprotective action is associated with the formation of amorphous structure of the product, reducing the number of crystallization centers and reducing the activity of water, which is especially important for long-term meat products storage at sub-zero temperatures. For this purpose, the composition of a protein-polysaccharide composition was developed consisting of blood plasma proteins, sodium caseinate, flax fiber and plantain in a ratio of 1:1:2:2. The regularities of the influence of the selected composition on the physicochemical properties of model minced meat systems have been established. The possibility of using this composition to eliminate the disadvantages of low-quality meat raw materials in the semi-finished meat products of  has been proved and to counteract the negative effects of their long-term storage in the frozen state. It has been found that the composite mixture of plasma proteins, sodium caseinate, fibers of linen and plantain in the amount of 3% reduces the cryoscopic temperature, decreases the mass fraction of frozen moisture by 1.7% and also reduces water activity by 0.031… 0.067, which helps to extend the shelf life of chopped semi-finished products. Based on the search for the extrema of the mathematical dependence of the amount of frozen water on the duration of storage of minced meat semi-finished products at a temperature of minus 10 ° C was established a rational content of the protein-polysaccharide composition (3%). This allows you to purposefully form and stabilize the specified functional-technological, structural-mechanical and organoleptic characteristics of the finished product. In order to develop recommendations on the use of the protein-polysaccharide composition as a cryoprotectant, the chemical composition and functional-technological properties (FCS) of model minced meat systems with different levels of its use were studied. The technological feasibility of using protein-polysaccharide composition in the amount of 3%, which is an effective cryoprotectant in meat minced systems during low-temperature processing has been proved.

scholarly journals Reinforcement of Thermoplastic Corn Starch with Crosslinked Starch/Chitosan Microparticles

Polymers ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 985 ◽  
Author(s):  
Diana Paiva ◽  
André Pereira ◽  
Ana Pires ◽  
Jorge Martins ◽  
Luísa Carvalho ◽  
...  
Keyword(s):  
Water Solubility ◽  
Corn Starch ◽  
Polymer Network ◽  
Xrd Analysis ◽  
Thermoplastic Starch ◽  
Interpenetrating Polymer Network ◽  
Melt Mixing ◽  
Chitosan Microparticles ◽  
Polysaccharide Composition ◽  
Low Solubility

Microparticles of corn starch and chitosan crosslinked with glutaraldehyde, produced by the solvent exchange technique, are studied as reinforcement fillers for thermoplastic corn starch plasticized with glycerol. The presence of 10% w/w chitosan in the microparticles is shown to be essential to guaranteeing effective crosslinking, as demonstrated by water solubility assays. Crosslinked chitosan forms an interpenetrating polymer network with starch chains, producing microparticles with a very low solubility. The thermal stability of the microparticles is in agreement with their polysaccharide composition. An XRD analysis showed that they have crystalline fraction of 32% with Va-type structure, and have no tendency to undergo retrogradation. The tensile strength, Young’s modulus, and toughness of thermoplastic starch increased by the incorporation of the crosslinked starch/chitosan microparticles by melt-mixing. Toughness increased 360% in relation to unfilled thermoplastic starch.

scholarly journals Mucilage Polysaccharide Composition and Exudation in Maize From Contrasting Climatic Regions

2020 ◽  
Vol 11 ◽  
Author(s):  
Meisam Nazari ◽  
Sophie Riebeling ◽  
Callum C. Banfield ◽  
Asegidew Akale ◽  
Margherita Crosta ◽  
...  
Keyword(s):  
Vapor Pressure ◽  
Vapor Pressure Deficit ◽  
Genetic Material ◽  
Root Tips ◽  
High Vapor Pressure ◽  
Climatic Regions ◽  
Randomized Field Experiment ◽  
Neutral Sugars ◽  
High Vapor ◽  
Polysaccharide Composition

Mucilage, a gelatinous substance comprising mostly polysaccharides, is exuded by maize nodal and underground root tips. Although mucilage provides several benefits for rhizosphere functions, studies on the variation in mucilage amounts and its polysaccharide composition between genotypes are still lacking. In this study, eight maize (Zea mays L.) genotypes from different globally distributed agroecological zones were grown under identical abiotic conditions in a randomized field experiment. Mucilage exudation amount, neutral sugars and uronic acids were quantified. Galactose (∼39–42%), fucose (∼22–30%), mannose (∼11–14%), and arabinose (∼8–11%) were the major neutral sugars in nodal root mucilage. Xylose (∼1–4%), and glucose (∼1–4%) occurred only in minor proportions. Glucuronic acid (∼3–5%) was the only uronic acid detected. The polysaccharide composition differed significantly between maize genotypes. Mucilage exudation was 135 and 125% higher in the Indian (900 M Gold) and Kenyan (DH 02) genotypes than in the central European genotypes, respectively. Mucilage exudation was positively associated with the vapor pressure deficit of the genotypes’ agroecological zone. The results indicate that selection for environments with high vapor pressure deficit may favor higher mucilage exudation, possibly because mucilage can delay the onset of hydraulic failure during periods of high vapor pressure deficit. Genotypes from semi-arid climates might offer sources of genetic material for beneficial mucilage traits.

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