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Purified polysaccharides of Geoffroea spinosa barks have anticoagulant and antithrombotic activities devoid of hemorrhagic risks.

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Polysaccharides were extracted from the barks of Geoffroea spinosa, purified using anion exchange chromatography and characterized by chemical and methylation analysis, complemented by infrared and NMR spectroscopies. These polysaccharides were tested for their anticoagulant, antithrombotic and

Anticoagulant activity of native and partially degraded glycoglucuronomannan after chemical sulfation.

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Heparin has great clinical importance as anticoagulant and antithrombotic agent. However, because of its risks of causing bleeding and contamination by animal pathogens, several studies aim to obtain alternatives to heparin. In the search for anticoagulant and antithrombotic agents from a non-animal

Development of a versatile and stable internal control system for RT-qPCR assays.

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RT-qPCR, an established method for the detection of RNA viruses, requires internal RNA controls for the correct interpretation of PCR results. Robust and versatile RT-PCR controls can be achieved for example by packaging RNA into a virus-derived protein shell. In this study a MS2-based internal

Biological activities of leptospiral lipopolysaccharide.

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Lipopolysaccharide extracted with phenol-water from Leptospira interrogans serovar copenhageni strain Shibaura (L-LPS) showed various biological activities. In lethality for mice, L-LPS was active (LD 50, 3.4 mg/mouse) but about 12 times less potent than Escherichia coli LPS (E-LPS) per weight

Ischemia-induced endothelial cell dysfunction.

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Hemorrhagic transformation upon reperfusion therapy has focused attention on ischemia-induced endothelial dysfunction. This study examined whether hyperglycemia may induce hemorrhagic transformation by enhancing endothelial mitochondrial damage during ischemia and whether preconditioning (PC)

[Expression, refolding and biological activity of recombinant type-I metalloproteinase acutolysin a from Agkistrodon acutus].

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Type-I snake venom metalloproteinase acutolysin A gene was cloned into the prokaryotic expression vector pBAD/gIIIA and the resulting recombinant plasmid pDS was obtained. By the induction with 0.02% L-(+)-arabinose, the recombinant metalloproteinase was expressed in insoluble inclusion body in E.

An acidic glycoconjugate from Lythrum salicaria L. with controversial effects on haemostasis.

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OBJECTIVE Lythrum salicaria L. belongs to the small Lythraceae family of 22 genera, which range in habit from herbs to shrubs and trees found with worldwide distribution (Heywood, 1993). The generic name of Lythrum derived from Greek "luthron"--blood, possibly referring to the color of the flowers

Characterization, antioxidant, and anticancer activities of a neutral polysaccharide from Duchesnea indica (Andr.) Focke.

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A neutral polysaccharide (DIP-1) from Duchesnea indica (Andr.) Focke was obtained by hot water extraction, ethanol precipitation and chromatographic separation (DEAE-52 cellulose anion-exchange column and Sephadex G-100 gel column). The physicochemical properties of DIP-1 were elucidated by gel

Dickeyafangzhongdai sp. nov., a plant-pathogenic bacterium isolated from pear trees (Pyrus pyrifolia).

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Gram-stain-negative, pectinolytic bacteria were repeatedly isolated from pear trees displaying symptoms of bleeding canker in China. Three strains, JS5T, LN1 and QZH3, had identical 16S rRNA gene sequences that shared 99 % similarity to the type strain of Dickeya dadantii. Phylogenetic analysis of

Antioxidant and immunomodulatory activities of polysaccharides from the roots of Sanguisorba officinalis.

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The roots of Sanguisorba officinalis are used in traditional Chinese medicine for the treatment of diseases such as inflammation and internal haemorrhage. Several scientific investigations involving extraction and pharmacological studies of terpenoids and triterpenoid glycosides from this herb have

An arabinogalactan-glycoconjugate from Genipa americana leaves present anticoagulant, antiplatelet and antithrombotic effects.

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Glycoconjugates extracted from Genipa americana leaves (PE-Ga) were separated into two fractions, denominated as PFI and PFII (total carbohydrate: 23-36%/uronic acid: 9-30%; protein:4-5%; polyphenols:0.776-0.812 mg/g), mainly composed by arabinose, galactose and uronic acid and presenting high (PFI)

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