Pectin substances of seaweeds VI. An investigation of degraded zosterin

Summary It has been shown that the polyuronide chain of zosterin, the pectin of seaweeds of the family Zosteraceae, contains several L-rhamnose residues connected by 1,2 linkages and present at the points of branching of the carbohydrate chain.Institute of Biologically Active Substances, Far Eastern Scientific Center, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 246–249, May–June, 1971.     

Pectin substances of seaweeds XI. Aninvestigation of some products of the enzymatic hydrolysis of zosterin

Summary It has been established that calthoside D is hederagenin 3-[O--D-glucopyranosyl-(12)--L-arabopyranoside] and is identical with caulosaponin B.Institute of Biologically Active Substances, Far-Eastern Scientific Center, Academy of Sciences of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 3, p. 303–306, May–June, 1972.     

Pectin substances ofAmaranthus cruentus

Pectin substances have been isolated from the epigeal pan of love-lies-bleeding,Amaranthus cruentus (A. caudatus), and have been characterized. The presence in them of galacturonic acid, galactose, rhamnose, xylose, arabinose, fructose, and glucose residues has been established. The titrimetric indices of the substances isolated have been determined and they have been studied by IR spectroscopy.Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 7–9, January–February, 1996. Original article submitted August 14, 1995.     

Complexes of metallochromic substances. VII

Summary The dissociation constants of the sulphonazo III-proton complexes, and the composition and global stability constant of the sulphonazo III-barium(II) complex were determined. The optimum conditions for the spectrophotometric determination of barium(II) and sulphate ions by means of sulphonazo III were worked out. The determination of barium is the most sensitive and selective of all known spectrophotometric barium determinations.

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Zusammenfassung Die Dissoziationskonstanten der Sulphonazo III-Proton-Komplexe, sowie die Zusammensetzung und globale Stabilitätskonstante des Sulphonazo III-Barium(II)-Komplexes wurden festgestellt. Die optimalen Bedingungen für die spektralphotometrische Barium- und Sulfatbestimmung mit Hilfe von Sulfonazo III wurden ausgearbeitet. Die beschriebene Bestimmung von Barium stellt die empfindlichste und selektivste aller bekannten spektralphotometrischen Bariumbestimmungen dar.

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Part VI, see.     

Pectin substances of the mulberry

Several variants of the isolation of pectin substances from mulberry boughs are considered.Institute of the Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 773–775, November–December, 1989.     

Pectin substances of the mulberry

Several variants of the isolation of pectin substances from mulberry boughs are considered.     

Pectin substances of sugar beet pulp

Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, FAX (3712) 89 14 75. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 562–563, July–August, 1994.     

Pectin substances ofChara aculeolata

Summary The carbohydrate complex of the Chara algaChara aculeolata Kütz includes an acid polysaccharide similar to the pectin substances of higher plants. It is based on a fragment constructed of -14 bound residues of D-galacturonic acid in the pyranose form. The pectin is characterized by a high homogeneity, a considerable content of D-galacturonic acid, and a low degree of acidification of the carboxy groups.M. V. Lomonosov Odessa Technological Institute of the Food Industry. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 702–705, November–December, 1976.     

Polysaccharides ofEremurus. XXI. Pectin substances of the leaves ofEremurus regelii

The pectin substances have been isolated fromEremurus regelii Vved., their qualitative and quantitative monosaccharide compositions have been determined, and their physicochemical properties have been studied. The partial hydrolysis of the pectin gave a galacturonan. On the basis of the results of periodate-nitric acid oxidation, enzymatic hydrolysis, and methylation it has been shown that in the galacturoman the galacturonic acid residues are linked by -(1 4)-glycosidic bonds.Deceased.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 172–174, March–April, 1985.