The lignin of the sea island cotton plant of variety S-6030 affected by fusarial wilt. I

A comparative study of the dioxane lignins isolated from healthy and wilt-affected cotton plant stems has shown thatFusarium fungi demethylate lignin and make it more oxidized than the lignin from healthy stems.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 825–827, November–December, 1985.     

The lignin of the sea island cotton plant of variety S-6030 affected by fusarial wilt. I

A comparative study of the dioxane lignins isolated from healthy and wilt-affected cotton plant stems has shown thatFusarium fungi demethylate lignin and make it more oxidized than the lignin from healthy stems.     

Phospholipids of the cotton plant of variety S-6030

Summary 1. The decomposition of sphagnum moss and of an isolated preparation of lignin (DLA) by means of metallic sodium in liquid ammonia has been performed, and a phenolic fraction has been isolated with a yield of 0.89% from the moss and 10.2% from the lignin.2. The following phenols were isolated from the phenolic fraction and their yields were determined by paper and gas-liquid chromatography: 4-hydroxyphenylpropane, 1-and 3-(4-hydroxyphenyl)propan-1-ols, 1-(4-hydroxy-3-methoxyphenyl)propane, 1-(4-hydroxy-3-methoxyphenyl)-propan-1-ol, p-hydroxybenzaldehyde, vanillin, and p-hydroxybenzyl and vanillyl alcohols.3. The quantitative figures on the composition of the phenolic fraction of the decomposition products give grounds for assuming that the uncondensed structural fragments of sphagnum moss lignin are composed to the extent of two thirds of structural units of the p-hydroxyphenyl type joined to one another by -alkyl aryl ether bonds.4. Weighty evidence is given in favor of the assumption that sphagnum moss lignin contains as monomeric structural fragments vanillin and p-hydroxybenzaldehyde, these being attached to the polymer chain by alkyl-aryl or aryl-aryl ether bonds.S. M. Kirov Belorussian Technologic Institute. Institute of Physical Organic Chemistry, Academy of Sciences of the Belorussian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 77–83, January–February, 1975.     

A study of the lignin of the sea island cotton plant of variety S-6030

The dioxane lignin has been isolated by Pepper's method with a yield of 9.5% on the Komarov lignin from the ripe stems of the sea island cotton plant of variety S-6030. The developed emperical formula has been calculated, the IR and UV spectra have been taken, and the molecular-mass distribution has been studied. The dioxane lignin is polydisperse. M_w=10,100, M_n=5350.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 628–630, September–October, 1983.     

Study of the lignin of a cotton plant of the variety S-6524

The dioxane lignin (DLA) has been isolated from ripe stems of a cotton plant of the variety S-6524, and its empirical formula and molecular mass have been determined. This DLA differed from the DLA of a cotton plant of variety 108-F by a lower degree of hydroxylation and a higher degree of substitution of the aromatic rings. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, FAX (3712) 62 73 48. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 430–431, May–June, 1994.     

Molecular composition of the N-acylphosphatidylethanolamine of the cotton plant of variety S-6029

An N-arylphosphatidylethanolamine has been isolated from the total phospholipids of the cotton plant of variety S-6029. The composition and the position distribution of the fatty-acid radicals has been studied with the aid of enzymatic hydrolysis with phospholipase A₁ (from the fungusRhisophus microsporus UzLT-1) and by alkaline and acid hydrolyses. From the results obtained, the possible molecular composition of the N-acylphosphatidylethanolamine has been calculated by Coleman's method. The total number of all the molecular species amounted to 720.     

Molecular composition of the N-acylphosphatidylethanolamine of the cotton plant of variety S-6029

An N-arylphosphatidylethanolamine has been isolated from the total phospholipids of the cotton plant of variety S-6029. The composition and the position distribution of the fatty-acid radicals has been studied with the aid of enzymatic hydrolysis with phospholipase A₁ (from the fungusRhisophus microsporus UzLT-1) and by alkaline and acid hydrolyses. From the results obtained, the possible molecular composition of the N-acylphosphatidylethanolamine has been calculated by Coleman's method. The total number of all the molecular species amounted to 720.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 780–783, November–December, 1979.     

Study of the lignin of a cotton plant of the variety S-6524

The dioxane lignin (DLA) has been isolated from ripe stems of a cotton plant of the variety S-6524, and its empirical formula and molecular mass have been determined. This DLA differed from the DLA of a cotton plant of variety 108-F by a lower degree of hydroxylation and a higher degree of substitution of the aromatic rings.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, FAX (3712) 62 73 48. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 430–431, May–June, 1994.     

A study of the dioxane lignin of the stems of the cotton plant of variety S-4880

The dioxane lignin (DLA) has been isolated from the ripe stems of a cotton plant of the variety S-4880 B by a modification of Pepper's method. The yield was 16.9% on the Komarov lignin. The semiempirical formula of a phenylpropane structural unit has been calculated on the basis of elementary and functional analyses. It has been established that the amount of the main functional groups in the DLA and in the lignins isolated from the varieties of 108-F and Tashkent-2 basically coincide, but the DLA investigated was appreciably more highly methoxylated. The IR, UV, and PMR spectra of the DLA have been taken. The molecular-weight distribution of the DLA has been investigated and it has been shown that is is poly-disperse and has a weight-average molecular weight of 7400. Nitrobenzene oxidation and cleavage with sodium and liquid ammonia of the isolated DLA has shown that guaiacyl structural units predominate in it.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 430–434, May–June, 1987.